--- /dev/null
+/* Interfaces to system-dependent kernel and library entries.
+ Copyright (C) 1985, 1986, 1987, 1988 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+
+#include <signal.h>
+#include <setjmp.h>
+
+#include "config.h"
+#include "lisp.h"
+#undef NULL
+
+#define min(x,y) ((x) > (y) ? (y) : (x))
+
+/* In this file, open, read and write refer to the system calls,
+ not our sugared interfaces sys_open, sys_read and sys_write.
+ Contrariwise, for systems where we use the system calls directly,
+ define sys_read, etc. here as aliases for them. */
+#ifndef read
+#define sys_read read
+#define sys_write write
+#endif /* `read' is not a macro */
+
+#undef read
+#undef write
+
+#ifndef close
+#define sys_close close
+#else
+#undef close
+#endif
+
+#ifndef open
+#define sys_open open
+#else /* `open' is a macro */
+#undef open
+#endif /* `open' is a macro */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+extern int errno;
+#ifndef VMS
+extern char *sys_errlist[];
+#endif
+
+#ifdef VMS
+#include <rms.h>
+#include <ttdef.h>
+#include <tt2def.h>
+#include <iodef.h>
+#include <ssdef.h>
+#include <descrip.h>
+#include <fibdef.h>
+#include <atrdef.h>
+#include <ctype.h>
+#include <string.h>
+#ifdef __GNUC__
+#include <sys/file.h>
+#else
+#include <file.h>
+#endif
+#undef F_SETFL
+#ifndef RAB$C_BID
+#include <rab.h>
+#endif
+#define MAXIOSIZE ( 32 * PAGESIZE ) /* Don't I/O more than 32 blocks at a time */
+#endif /* VMS */
+
+#ifndef BSD4_1
+#ifdef BSD /* this is done this way to avoid defined (BSD) || defined (USG)
+ because the vms compiler doesn't grok `defined' */
+#include <fcntl.h>
+#endif
+#ifdef USG
+#include <fcntl.h>
+#endif
+#endif /* not 4.1 bsd */
+
+/* Get DGUX definition for FASYNC - DJB */
+#ifdef DGUX
+#include <sys/file.h>
+#endif /* DGUX */
+
+#include <sys/ioctl.h>
+
+#ifdef APOLLO
+#undef TIOCSTART
+#endif
+
+#ifdef BSD
+#ifdef BSD4_1
+#include <wait.h>
+#else /* not 4.1 */
+#include <sys/wait.h>
+#endif /* not 4.1 */
+#endif /* BSD */
+
+#ifdef AIX
+/* Get files for keyboard remapping */
+#define HFNKEYS 2
+#include <sys/hft.h>
+#include <sys/devinfo.h>
+#endif
+
+/* Get rid of LLITOUT in 4.1, since it is said to stimulate kernel bugs. */
+#ifdef BSD4_1
+#undef LLITOUT
+#define LLITOUT 0
+#endif /* 4.1 */
+
+#ifdef HAVE_TERMIOS
+#include <termio.h>
+#include <termios.h>
+#ifdef TIOCGETP
+#undef TIOCGETP
+#endif
+#define TIOCGETP TCGETS
+#undef TIOCSETN
+#define TIOCSETN TCSETSW
+#undef TIOCSETP
+#define TIOCSETP TCSETSF
+#undef TCSETAW
+#define TCSETAW TCSETS
+#define TERMINAL struct termios
+#define OSPEED(str) (str.c_cflag & CBAUD)
+#define SETOSPEED(str,new) (str.c_cflag = (str.c_cflag & ~CBAUD) | (new))
+#define TABS_OK(str) ((str.c_oflag & TABDLY) != TAB3)
+#else
+#define tcgetattr(fd, addr) ioctl (fd, TIOCGETP, addr)
+#endif /* HAVE_TERMIOS */
+
+#ifdef HAVE_TERMIO
+#include <termio.h>
+#undef TIOCGETP
+#define TIOCGETP TCGETA
+#undef TIOCSETN
+/* Wait for output to finish before switching modes.
+ Otherwise screen can be garbaged. */
+#define TIOCSETN TCSETAW
+#undef TIOCSETP
+#define TIOCSETP TCSETAF
+#define TERMINAL struct termio
+#define OSPEED(str) (str.c_cflag & CBAUD)
+#define SETOSPEED(str,new) (str.c_cflag = (str.c_cflag & ~CBAUD) | (new))
+#define TABS_OK(str) ((str.c_oflag & TABDLY) != TAB3)
+#endif /* HAVE_TERMIO */
+
+#ifdef BROKEN_TIOCGETC
+#undef TIOCGETC /* Avoid confusing some conditionals that test this. */
+#endif
+
+#ifdef BROKEN_TIOCGWINSZ
+#undef TIOCGWINSZ
+#endif
+
+#ifndef HAVE_TERMIO
+#ifndef VMS
+#include <sgtty.h>
+#define TERMINAL struct sgttyb
+#define OSPEED(str) str.sg_ospeed
+#define SETOSPEED(str,new) (str.sg_ospeed = (new))
+#define TABS_OK(str) ((str.sg_flags & XTABS) != XTABS)
+#undef TCSETAW
+#define TCSETAW TIOCSETN
+#endif /* not VMS */
+#endif /* not HAVE_TERMIO */
+
+#ifdef USG
+#include <sys/utsname.h>
+#include <string.h>
+#ifndef MEMORY_IN_STRING_H
+#include <memory.h>
+#endif
+#ifdef TIOCGWINSZ
+#ifdef NEED_SIOCTL
+#include <sys/sioctl.h>
+#endif
+#ifdef NEED_PTEM_H
+#include <sys/stream.h>
+#include <sys/ptem.h>
+#endif
+#endif /* TIOCGWINSZ */
+#ifdef NEED_TIME_H
+#include <time.h>
+#else /* not NEED_TIME_H */
+#ifdef HAVE_TIMEVAL
+#include <sys/time.h>
+#endif /* HAVE_TIMEVAL */
+#endif /* not NEED_TIME_H */
+#endif /* USG */
+
+#ifdef NEED_BSDTTY
+#include <sys/bsdtty.h>
+#endif
+
+#if defined (HPUX) && defined (HAVE_PTYS)
+#include <sys/ptyio.h>
+#endif
+
+#ifdef AIX
+#include <sys/pty.h>
+#include <unistd.h>
+#endif /* AIX */
+
+#ifdef SYSV_PTYS
+#include <sys/tty.h>
+#include <sys/pty.h>
+#endif
+
+#ifdef BROKEN_FIONREAD
+#undef FIONREAD
+#undef FASYNC
+#endif
+
+extern int quit_char;
+
+#include "screen.h"
+#include "window.h"
+#include "termhooks.h"
+#include "termchar.h"
+#include "termopts.h"
+#include "dispextern.h"
+#include "process.h"
+
+#ifdef NONSYSTEM_DIR_LIBRARY
+#include "ndir.h"
+#endif /* NONSYSTEM_DIR_LIBRARY */
+
+#include "emacssignal.h"
+
+#ifndef sigunblock
+#define sigunblock(SIG) \
+{ SIGMASKTYPE omask = sigblock (SIGEMPTYMASK); sigsetmask (omask & ~SIG); }
+#endif
+
+/* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
+ testing SIGCHLD. */
+
+#ifndef VMS
+#ifdef SIGCLD
+#ifndef SIGCHLD
+#define SIGCHLD SIGCLD
+#endif /* not SIGCHLD */
+#endif /* SIGCLD */
+#endif /* not VMS */
+
+static int baud_convert[] =
+#ifdef BAUD_CONVERT
+ BAUD_CONVERT;
+#else
+ {
+ 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
+ 1800, 2400, 4800, 9600, 19200, 38400
+ };
+#endif
+
+extern short ospeed;
+
+#ifdef VMS
+static struct iosb
+{
+ short status;
+ short offset;
+ short termlen;
+ short term;
+} input_iosb;
+
+int kbd_input_ast ();
+
+int waiting_for_ast;
+int stop_input;
+int input_ef = 0;
+int timer_ef = 0;
+int process_ef = 0;
+int input_eflist;
+int timer_eflist;
+
+static int input_chan;
+static $DESCRIPTOR (input_dsc, "TT");
+static int terminator_mask[2] = { 0, 0 };
+
+static struct sensemode {
+ short status;
+ unsigned char xmit_baud;
+ unsigned char rcv_baud;
+ unsigned char crfill;
+ unsigned char lffill;
+ unsigned char parity;
+ unsigned char unused;
+ char class;
+ char type;
+ short scr_wid;
+ unsigned long tt_char : 24, scr_len : 8;
+ unsigned long tt2_char;
+} sensemode_iosb;
+#define TERMINAL struct sensemode
+#define OSPEED(str) (str.xmit_baud)
+#define TABS_OK(str) ((str.tt_char & TT$M_MECHTAB) != 0)
+#endif /* VMS */
+
+discard_tty_input ()
+{
+ TERMINAL buf;
+
+ if (noninteractive)
+ return;
+
+ /* Discarding input is not safe when the input could contain
+ replies from the X server. So don't do it. */
+ if (read_socket_hook)
+ return;
+
+#ifdef VMS
+ end_kbd_input ();
+ SYS$QIOW (0, input_chan, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
+ &buf, 0, 0, terminator_mask, 0, 0);
+ queue_kbd_input ();
+#else /* not VMS */
+#ifdef APOLLO
+ {
+ int zero = 0;
+ ioctl (0, TIOCFLUSH, &zero);
+ }
+#else /* not Apollo */
+ tcgetattr (0, &buf);
+#ifndef HAVE_TCATTR
+ ioctl (0, TIOCSETP, &buf);
+#else
+ tcsetattr (0, TCSAFLUSH, &buf);
+#endif
+#endif /* not Apollo */
+#endif /* not VMS */
+}
+
+#ifdef SIGTSTP
+
+stuff_char (c)
+ char c;
+{
+/* Should perhaps error if in batch mode */
+#ifdef TIOCSTI
+ ioctl (0, TIOCSTI, &c);
+#else /* no TIOCSTI */
+ error ("Cannot stuff terminal input characters in this version of Unix.");
+#endif /* no TIOCSTI */
+}
+
+#endif /* SIGTSTP */
+
+init_baud_rate ()
+{
+ TERMINAL sg;
+
+ if (noninteractive)
+ ospeed = 0;
+ else
+ {
+#ifdef VMS
+ SYS$QIOW (0, input_chan, IO$_SENSEMODE, &sg, 0, 0,
+ &sg.class, 12, 0, 0, 0, 0 );
+#else
+ SETOSPEED (sg, B9600);
+ tcgetattr (0, &sg);
+#endif /* not VMS */
+ ospeed = OSPEED (sg);
+ }
+
+ baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
+ ? baud_convert[ospeed] : 9600);
+ if (baud_rate == 0)
+ baud_rate = 1200;
+}
+
+/*ARGSUSED*/
+set_exclusive_use (fd)
+ int fd;
+{
+#ifdef FIOCLEX
+ ioctl (fd, FIOCLEX, 0);
+#endif
+ /* Ok to do nothing if this feature does not exist */
+}
+
+#ifndef subprocesses
+
+wait_without_blocking ()
+{
+#ifdef BSD
+ wait3 (0, WNOHANG | WUNTRACED, 0);
+#else
+ croak ("wait_without_blocking");
+#endif
+ synch_process_alive = 0;
+}
+
+#endif /* not subprocesses */
+
+int wait_debugging; /* Set nonzero to make following function work under dbx
+ (at least for bsd). */
+
+SIGTYPE
+wait_for_termination_signal ()
+{}
+
+/* Wait for subprocess with process id `pid' to terminate and
+ make sure it will get eliminated (not remain forever as a zombie) */
+
+wait_for_termination (pid)
+ int pid;
+{
+ while (1)
+ {
+#ifdef subprocesses
+#ifdef VMS
+ int status;
+
+ status = sys$forcex (&pid, 0, 0);
+ break;
+#else /* not VMS */
+
+ /* Exit if the process has terminated. */
+ if (!synch_process_alive)
+ break;
+ /* Otherwise wait 1 second or until a signal comes in. */
+ signal (SIGALRM, wait_for_termination_signal);
+ alarm (1);
+ pause ();
+ alarm (0);
+ signal (SIGALRM, SIG_IGN);
+#endif /* not VMS */
+#else /* not subprocesses */
+#ifndef BSD4_1
+ if (kill (pid, 0) < 0)
+ break;
+ wait (0);
+#else /* BSD4_1 */
+ int status;
+ status = wait (0);
+ if (status == pid || status == -1)
+ break;
+#endif /* BSD4_1 */
+#endif /* not subprocesses */
+ }
+}
+
+#ifdef subprocesses
+
+/*
+ * flush any pending output
+ * (may flush input as well; it does not matter the way we use it)
+ */
+
+flush_pending_output (channel)
+ int channel;
+{
+#ifdef HAVE_TERMIOS
+ /* If we try this, we get hit with SIGTTIN, because
+ the child's tty belongs to the child's pgrp. */
+#else
+#ifdef TCFLSH
+ ioctl (channel, TCFLSH, 1);
+#else
+#ifdef TIOCFLUSH
+ int zero = 0;
+ /* 3rd arg should be ignored
+ but some 4.2 kernels actually want the address of an int
+ and nonzero means something different. */
+ ioctl (channel, TIOCFLUSH, &zero);
+#endif
+#endif
+#endif
+}
+
+#ifndef VMS
+/* Set up the terminal at the other end of a pseudo-terminal that
+ we will be controlling an inferior through.
+ It should not echo or do line-editing, since that is done
+ in Emacs. No padding needed for insertion into an Emacs buffer. */
+
+child_setup_tty (out)
+ int out;
+{
+ TERMINAL s;
+
+ tcgetattr (out, &s);
+#ifdef HAVE_TERMIO
+ s.c_oflag |= OPOST; /* Enable output postprocessing */
+ s.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
+ s.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY); /* No output delays */
+ s.c_lflag &= ~ECHO; /* Disable echo */
+ s.c_lflag |= ISIG; /* Enable signals */
+ s.c_iflag &= ~IUCLC; /* Disable map of upper case to lower on input */
+ s.c_oflag &= ~OLCUC; /* Disable map of lower case to upper on output */
+/* said to be unnecesary
+ s.c_cc[VMIN] = 1; /* minimum number of characters to accept
+ s.c_cc[VTIME] = 0; /* wait forever for at least 1 character
+*/
+ s.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
+ s.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
+ s.c_cc[VERASE] = 0377; /* disable erase processing */
+ s.c_cc[VKILL] = 0377; /* disable kill processing */
+#ifdef HPUX
+ s.c_cflag = (s.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
+#endif /* HPUX */
+#ifdef AIX
+/* AIX enhanced edit loses NULs, so disable it */
+#ifndef IBMR2AIX
+ s.c_line = 0;
+ s.c_iflag &= ~ASCEDIT;
+#endif
+ /* Also, PTY overloads NUL and BREAK.
+ don't ignore break, but don't signal either, so it looks like NUL. */
+ s.c_iflag &= ~IGNBRK;
+ s.c_iflag &= ~BRKINT;
+/* QUIT and INTR work better as signals, so disable character forms */
+ s.c_cc[VQUIT] = 0377;
+ s.c_cc[VINTR] = 0377;
+ s.c_cc[VEOL] = 0377;
+ s.c_lflag &= ~ISIG;
+ s.c_cflag = (s.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
+#endif /* AIX */
+
+#else /* not HAVE_TERMIO */
+ s.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE | CBREAK | TANDEM);
+ s.sg_erase = 0377;
+ s.sg_kill = 0377;
+#endif /* not HAVE_TERMIO */
+
+#ifndef HAVE_TCATTR
+ ioctl (out, TIOCSETN, &s);
+#else
+ tcsetattr (out, TCSADRAIN, &s);
+#endif
+
+#ifdef BSD4_1
+ if (interrupt_input)
+ reset_sigio ();
+#endif /* BSD4_1 */
+#ifdef RTU
+ {
+ int zero = 0;
+ ioctl (out, FIOASYNC, &zero);
+ }
+#endif /* RTU */
+}
+#endif /* not VMS */
+
+#endif /* subprocesses */
+
+/*ARGSUSED*/
+setpgrp_of_tty (pid)
+ int pid;
+{
+#ifdef IBMR2AIX
+ tcsetpgrp ( 0, pid);
+#else
+#ifdef TIOCSPGRP
+ ioctl (0, TIOCSPGRP, &pid);
+#else
+ /* Just ignore this for now and hope for the best */
+#endif
+#endif
+}
+
+/* Record a signal code and the handler for it. */
+struct save_signal
+{
+ int code;
+ SIGTYPE (*handler) ();
+};
+
+/* Suspend the Emacs process; give terminal to its superior. */
+
+sys_suspend ()
+{
+#ifdef VMS
+ unsigned long parent_id;
+
+ parent_id = getppid ();
+ if (parent_id && parent_id != 0xffffffff)
+ {
+ SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
+ int status = LIB$ATTACH (&parent_id) & 1;
+ signal (SIGINT, oldsig);
+ return status;
+ }
+ else
+ {
+ struct {
+ int l;
+ char *a;
+ } d_prompt;
+ d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
+ d_prompt.a = "Emacs: "; /* Just a reminder */
+ lib$spawn (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
+ return 1;
+ }
+ return -1;
+#else
+#ifdef SIGTSTP
+
+#ifdef BSD
+ killpg (getpgrp (0), SIGTSTP);
+#else
+ kill (-getpgrp (0), SIGTSTP);
+#endif
+
+#else /* No SIGTSTP */
+#ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
+ ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
+ kill (getpid (), SIGQUIT);
+
+#else /* No SIGTSTP or USG_JOBCTRL */
+
+/* On a system where suspending is not implemented,
+ instead fork a subshell and let it talk directly to the terminal
+ while we wait. */
+ int pid = fork ();
+ struct save_signal saved_handlers[5];
+
+ saved_handlers[0].code = SIGINT;
+ saved_handlers[1].code = SIGQUIT;
+ saved_handlers[2].code = SIGTERM;
+#ifdef SIGIO
+ saved_handlers[3].code = SIGIO;
+ saved_handlers[4].code = 0;
+#else
+ saved_handlers[3].code = 0;
+#endif
+
+ if (pid == -1)
+ error ("Can't spawn subshell");
+ if (pid == 0)
+ {
+ char *sh;
+
+ sh = (char *) egetenv ("SHELL");
+ if (sh == 0)
+ sh = "sh";
+ /* Use our buffer's default directory for the subshell. */
+ {
+ Lisp_Object dir;
+ unsigned char *str;
+ int len;
+
+ /* mentioning current_buffer->buffer would mean including buffer.h,
+ which somehow wedges the hp compiler. So instead... */
+
+ dir = intern ("default-directory");
+ /* Can't use NULL */
+ if (XFASTINT (Fboundp (dir)) == XFASTINT (Qnil))
+ goto xyzzy;
+ dir = Fsymbol_value (dir);
+ if (XTYPE (dir) != Lisp_String)
+ goto xyzzy;
+
+ str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
+ len = XSTRING (dir)->size;
+ bcopy (XSTRING (dir)->data, str, len);
+ if (str[len - 1] != '/') str[len++] = '/';
+ str[len] = 0;
+ chdir (str);
+ }
+ xyzzy:
+#ifdef subprocesses
+ close_process_descs (); /* Close Emacs's pipes/ptys */
+#endif
+ nice (-nice (0)); /* Give the new shell the default piority */
+ execlp (sh, sh, 0);
+ write (1, "Can't execute subshell", 22);
+ _exit (1);
+ }
+
+ save_signal_handlers (saved_handlers);
+ wait_for_termination (pid);
+ restore_signal_handlers (saved_handlers);
+
+#endif /* no USG_JOBCTRL */
+#endif /* no SIGTSTP */
+#endif /* not VMS */
+}
+
+save_signal_handlers (saved_handlers)
+ struct save_signal *saved_handlers;
+{
+ while (saved_handlers->code)
+ {
+ saved_handlers->handler = signal (saved_handlers->code, SIG_IGN);
+ saved_handlers++;
+ }
+}
+
+restore_signal_handlers (saved_handlers)
+ struct save_signal *saved_handlers;
+{
+ while (saved_handlers->code)
+ {
+ signal (saved_handlers->code, saved_handlers->handler);
+ saved_handlers++;
+ }
+}
+\f
+#ifdef F_SETFL
+
+int old_fcntl_flags;
+
+init_sigio ()
+{
+#ifdef FASYNC
+ old_fcntl_flags = fcntl (0, F_GETFL, 0) & ~FASYNC;
+#endif
+ request_sigio ();
+}
+
+reset_sigio ()
+{
+ unrequest_sigio ();
+}
+
+#ifdef FASYNC /* F_SETFL does not imply existance of FASYNC */
+
+request_sigio ()
+{
+#ifdef SIGWINCH
+ sigunblock (sigmask (SIGWINCH));
+#endif
+ fcntl (0, F_SETFL, old_fcntl_flags | FASYNC);
+
+ interrupts_deferred = 0;
+}
+
+unrequest_sigio ()
+{
+#ifdef SIGWINCH
+ sigblock (sigmask (SIGWINCH));
+#endif
+ fcntl (0, F_SETFL, old_fcntl_flags);
+ interrupts_deferred = 1;
+}
+
+#else /* no FASYNC */
+#ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
+
+request_sigio ()
+{
+ int on = 1;
+ ioctl (0, FIOASYNC, &on);
+ interrupts_deferred = 0;
+}
+
+unrequest_sigio ()
+{
+ int off = 0;
+
+ ioctl (0, FIOASYNC, &off);
+ interrupts_deferred = 1;
+}
+
+#else /* not FASYNC, not STRIDE */
+
+request_sigio ()
+{
+ croak ("request_sigio");
+}
+
+unrequest_sigio ()
+{
+ croak ("unrequest_sigio");
+}
+
+#endif /* STRIDE */
+#endif /* FASYNC */
+#endif /* F_SETFL */
+\f
+TERMINAL old_gtty; /* The initial tty mode bits */
+
+int term_initted; /* 1 if outer tty status has been recorded */
+
+#ifdef F_SETOWN
+int old_fcntl_owner;
+#endif /* F_SETOWN */
+
+#ifdef TIOCGLTC
+struct ltchars old_ltchars;
+#endif /* TIOCGLTC */
+
+#ifdef TIOCGETC
+struct tchars old_tchars;
+int old_lmode;
+
+int lmode; /* Current lmode value. */
+ /* Needed as global for 4.1 */
+#endif /* TIOCGETC */
+
+/* This may also be defined in stdio,
+ but if so, this does no harm,
+ and using the same name avoids wasting the other one's space. */
+
+#if defined (USG) || defined (DGUX)
+unsigned char _sobuf[BUFSIZ+8];
+#else
+char _sobuf[BUFSIZ];
+#endif
+
+#ifdef TIOCGLTC
+static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
+#endif
+#ifdef TIOCGETC
+ static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
+#endif
+
+init_sys_modes ()
+{
+ TERMINAL tty;
+#ifdef TIOCGETC
+ struct tchars tchars;
+#endif
+#ifdef VMS
+#if 0
+ static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
+ extern int (*interrupt_signal) ();
+#endif
+#endif
+
+ if (noninteractive)
+ return;
+
+#ifdef VMS
+ if (!input_ef)
+ input_ef = get_kbd_event_flag ();
+ /* LIB$GET_EF (&input_ef); */
+ SYS$CLREF (input_ef);
+ waiting_for_ast = 0;
+ if (!timer_ef)
+ timer_ef = get_timer_event_flag ();
+ /* LIB$GET_EF (&timer_ef); */
+ SYS$CLREF (timer_ef);
+ if (!process_ef)
+ {
+ LIB$GET_EF (&process_ef);
+ SYS$CLREF (process_ef);
+ }
+ if (input_ef / 32 != process_ef / 32)
+ croak ("Input and process event flags in different clusters.");
+ if (input_ef / 32 != timer_ef / 32)
+ croak ("Input and process event flags in different clusters.");
+ input_eflist = ((unsigned) 1 << (input_ef % 32)) |
+ ((unsigned) 1 << (process_ef % 32));
+ timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
+ ((unsigned) 1 << (timer_ef % 32));
+ SYS$QIOW (0, input_chan, IO$_SENSEMODE, &old_gtty, 0, 0,
+ &old_gtty.class, 12, 0, 0, 0, 0);
+#ifndef VMS4_4
+ sys_access_reinit ();
+#endif
+#else /* not VMS */
+ tcgetattr (0, &old_gtty);
+#endif /* not VMS */
+ if (!read_socket_hook && EQ (Vwindow_system, Qnil))
+ {
+ tty = old_gtty;
+
+#ifdef HAVE_TERMIO
+ tty.c_iflag |= (IGNBRK); /* Ignore break condition */
+ tty.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
+#ifdef ISTRIP
+ tty.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
+#endif
+ tty.c_lflag &= ~ECHO; /* Disable echo */
+ tty.c_lflag &= ~ICANON; /* Disable erase/kill processing */
+ tty.c_lflag |= ISIG; /* Enable signals */
+ if (flow_control)
+ {
+ tty.c_iflag |= IXON; /* Enable start/stop output control */
+#ifdef IXANY
+ tty.c_iflag &= ~IXANY;
+#endif /* IXANY */
+ }
+ else
+ tty.c_iflag &= ~IXON; /* Disable start/stop output control */
+ tty.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
+ tty.c_oflag &= ~TAB3; /* Disable tab expansion */
+#ifdef CS8
+ if (meta_key)
+ {
+ tty.c_cflag |= CS8; /* allow 8th bit on input */
+ tty.c_cflag &= ~PARENB;/* Don't check parity */
+ }
+#endif
+ tty.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
+ /* Set up C-g for both SIGQUIT and SIGINT.
+ We don't know which we will get, but we handle both alike
+ so which one it really gives us does not matter. */
+ tty.c_cc[VQUIT] = quit_char;
+ tty.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
+ tty.c_cc[VTIME] = 0; /* no matter how long that takes. */
+#ifdef VSWTCH
+ tty.c_cc[VSWTCH] = CDEL; /* Turn off shell layering use of C-z */
+#endif /* VSWTCH */
+#if defined (mips) || defined (HAVE_TCATTR)
+ /* The following code looks like the right thing in general,
+ but it is said to cause a crash on USG V.4.
+ Let's play safe by turning it on only for the MIPS. */
+#ifdef VSUSP
+ tty.c_cc[VSUSP] = CDEL; /* Turn off mips handling of C-z. */
+#endif /* VSUSP */
+#ifdef V_DSUSP
+ tty.c_cc[V_DSUSP] = CDEL; /* Turn off mips handling of C-y. */
+#endif /* V_DSUSP */
+#endif /* mips or HAVE_TCATTR */
+#ifdef AIX
+#ifndef IBMR2AIX
+ /* AIX enhanced edit loses NULs, so disable it */
+ tty.c_line = 0;
+ tty.c_iflag &= ~ASCEDIT;
+#else
+ tty.c_cc[VSTRT] = 255;
+ tty.c_cc[VSTOP] = 255;
+ tty.c_cc[VSUSP] = 255;
+ tty.c_cc[VDSUSP] = 255;
+#endif /* IBMR2AIX */
+ /* Also, PTY overloads NUL and BREAK.
+ don't ignore break, but don't signal either, so it looks like NUL.
+ This really serves a purpose only if running in an XTERM window
+ or via TELNET or the like, but does no harm elsewhere. */
+ tty.c_iflag &= ~IGNBRK;
+ tty.c_iflag &= ~BRKINT;
+#endif
+#else /* if not HAVE_TERMIO */
+#ifdef VMS
+ tty.tt_char |= TT$M_NOECHO;
+ if (meta_key)
+ tty.tt_char |= TT$M_EIGHTBIT
+ if (flow_control)
+ tty.tt_char |= TT$M_TTSYNC;
+ else
+ tty.tt_char &= ~TT$M_TTSYNC;
+ tty.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
+#else /* not VMS (BSD, that is) */
+ tty.sg_flags &= ~(ECHO | CRMOD | XTABS);
+ if (meta_key)
+ tty.sg_flags |= ANYP;
+ tty.sg_flags |= interrupt_input ? RAW : CBREAK;
+#endif /* not VMS (BSD, that is) */
+#endif /* not HAVE_TERMIO */
+
+#ifdef VMS
+ SYS$QIOW (0, input_chan, IO$_SETMODE, &input_iosb, 0, 0,
+ &tty.class, 12, 0, 0, 0, 0);
+#else
+#ifndef HAVE_TCATTR
+ ioctl (0, TIOCSETN, &tty);
+#else
+ tcsetattr (0, TCSADRAIN, &tty);
+#endif
+#endif /* not VMS */
+
+ /* This code added to insure that, if flow-control is not to be used,
+ we have an unlocked screen at the start. */
+#ifdef TCXONC
+ if (!flow_control) ioctl (0, TCXONC, 1);
+#endif
+#ifndef APOLLO
+#ifdef TIOCSTART
+ if (!flow_control) ioctl (0, TIOCSTART, 0);
+#endif
+#endif
+
+#ifdef AIX
+ hft_init ();
+#ifdef IBMR2AIX
+ {
+ /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
+ to be only LF. This is the way that is done. */
+ struct termio tty;
+
+ if (ioctl (1, HFTGETID, &tty) != -1)
+ write (1, "\033[20l", 5);
+ }
+#endif
+#endif
+
+ /* If going to use CBREAK mode, we must request C-g to interrupt
+ and turn off start and stop chars, etc. If not going to use
+ CBREAK mode, do this anyway so as to turn off local flow
+ control for user coming over network on 4.2; in this case,
+ only t_stopc and t_startc really matter. */
+#ifdef TIOCGLTC
+ ioctl (0, TIOCGLTC, &old_ltchars);
+#endif /* TIOCGLTC */
+#ifndef HAVE_TERMIO
+#ifdef TIOCGETC
+ ioctl (0, TIOCGETC, &old_tchars);
+ ioctl (0, TIOCLGET, &old_lmode);
+
+ /* Note: if not using CBREAK mode, it makes no difference how we set this */
+ tchars = new_tchars;
+ tchars.t_intrc = quit_char;
+ if (flow_control)
+ {
+ tchars.t_startc = '\021';
+ tchars.t_stopc = '\023';
+ }
+/* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
+#ifndef LPASS8
+#define LPASS8 0
+#endif
+
+#ifdef BSD4_1
+#define LNOFLSH 0100000
+#endif
+
+ lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_lmode;
+
+ ioctl (0, TIOCSETC, &tchars);
+ ioctl (0, TIOCLSET, &lmode);
+#endif /* TIOCGETC */
+#endif /* not HAVE_TERMIO */
+#ifdef TIOCGLTC
+ ioctl (0, TIOCSLTC, &new_ltchars);
+#endif /* TIOCGLTC */
+
+#ifdef VMS
+/* Appears to do nothing when in PASTHRU mode.
+ SYS$QIOW (0, input_chan, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
+ interrupt_signal, oob_chars, 0, 0, 0, 0);
+*/
+ queue_kbd_input (0);
+#endif /* VMS */
+ }
+
+#ifdef F_SETFL
+#ifdef F_GETOWN /* F_SETFL does not imply existance of F_GETOWN */
+ if (interrupt_input)
+ {
+ old_fcntl_owner = fcntl (0, F_GETOWN, 0);
+ fcntl (0, F_SETOWN, getpid ());
+ init_sigio ();
+ }
+#endif /* F_GETOWN */
+#endif /* F_SETFL */
+
+#ifdef BSD4_1
+ if (interrupt_input)
+ init_sigio ();
+#endif
+
+#ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
+#undef _IOFBF
+#endif
+#ifdef _IOFBF
+ /* This symbol is defined on recent USG systems.
+ Someone says without this call USG won't really buffer the file
+ even with a call to setbuf. */
+ setvbuf (stdout, _sobuf, _IOFBF, sizeof _sobuf);
+#else
+ setbuf (stdout, _sobuf);
+#endif
+ set_terminal_modes ();
+ if (term_initted && no_redraw_on_reenter)
+ {
+ if (display_completed)
+ direct_output_forward_char (0);
+ }
+ else
+ {
+ screen_garbaged = 1;
+#ifdef MULTI_SCREEN
+ if (SCREENP (Vterminal_screen))
+ SCREEN_GARBAGED_P (XSCREEN (Vterminal_screen)) = 1;
+#endif
+ }
+ term_initted = 1;
+}
+
+/* Return nonzero if safe to use tabs in output.
+ At the time this is called, init_sys_modes has not been done yet. */
+
+tabs_safe_p ()
+{
+ TERMINAL tty;
+ if (noninteractive)
+ return 1;
+#ifdef VMS
+ SYS$QIOW (0, input_chan, IO$_SENSEMODE, &tty, 0, 0,
+ &tty.class, 12, 0, 0, 0, 0);
+#else
+ tcgetattr (0, &tty);
+#endif /* not VMS */
+ return (TABS_OK (tty));
+}
+
+/* Get terminal size from system.
+ Store number of lines into *heightp and width into *widthp.
+ If zero or a negative number is stored, the value is not valid. */
+
+get_screen_size (widthp, heightp)
+ int *widthp, *heightp;
+{
+/* Define the 4.3 names in terms of the Sun names
+ if the latter exist and the former do not. */
+#ifdef TIOCGSIZE
+#ifndef TIOCGWINSZ
+#define TIOCGWINSZ TIOCGSIZE
+#define winsize ttysize
+#define ws_row ts_lines
+#define ws_col ts_cols
+#endif
+#endif /* Sun */
+
+/* Do it using the 4.3 names if possible. */
+#ifdef TIOCGWINSZ
+ struct winsize size;
+ *widthp = 0;
+ *heightp = 0;
+ if (ioctl (0, TIOCGWINSZ, &size) < 0)
+ return;
+ *widthp = size.ws_col;
+ *heightp = size.ws_row;
+#else /* not TIOCGWNSIZ */
+#ifdef VMS
+ TERMINAL tty;
+ SYS$QIOW (0, input_chan, IO$_SENSEMODE, &tty, 0, 0,
+ &tty.class, 12, 0, 0, 0, 0);
+ *widthp = tty.scr_wid;
+ *heightp = tty.scr_len;
+#else /* system doesn't know size */
+ *widthp = 0;
+ *heightp = 0;
+#endif /* system does not know size */
+#endif /* not TIOCGWINSZ */
+}
+\f
+reset_sys_modes ()
+{
+ if (noninteractive)
+ {
+ fflush (stdout);
+ return;
+ }
+ if (!term_initted)
+ return;
+ if (read_socket_hook || !EQ (Vwindow_system, Qnil))
+ return;
+ cursor_to (SCREEN_HEIGHT (selected_screen) - 1, 0);
+ clear_end_of_line (SCREEN_WIDTH (selected_screen));
+ /* clear_end_of_line may move the cursor */
+ cursor_to (SCREEN_HEIGHT (selected_screen) - 1, 0);
+#ifdef IBMR2AIX
+ {
+ /* HFT devices normally use ^J as a LF/CR. We forced it to
+ do the LF only. Now, we need to reset it. */
+ struct termio tty;
+
+ if (ioctl (1, HFTGETID, &tty) != -1)
+ write (1, "\033[20h", 5);
+ }
+#endif
+
+ reset_terminal_modes ();
+ fflush (stdout);
+#ifdef BSD
+#ifndef BSD4_1
+ /* Avoid possible loss of output when changing terminal modes. */
+ fsync (fileno (stdout));
+#endif
+#endif
+#ifdef TIOCGLTC
+ ioctl (0, TIOCSLTC, &old_ltchars);
+#endif /* TIOCGLTC */
+#ifndef HAVE_TERMIO
+#ifdef TIOCGETC
+ ioctl (0, TIOCSETC, &old_tchars);
+ ioctl (0, TIOCLSET, &old_lmode);
+#endif /* TIOCGETC */
+#endif /* not HAVE_TERMIO */
+#ifdef F_SETFL
+#ifdef F_SETOWN /* F_SETFL does not imply existance of F_SETOWN */
+ if (interrupt_input)
+ {
+ reset_sigio ();
+ fcntl (0, F_SETOWN, old_fcntl_owner);
+ }
+#endif /* F_SETOWN */
+#endif /* F_SETFL */
+#ifdef BSD4_1
+ if (interrupt_input)
+ reset_sigio ();
+#endif /* BSD4_1 */
+#ifdef VMS
+ end_kbd_input ();
+ SYS$QIOW (0, input_chan, IO$_SETMODE, &input_iosb, 0, 0,
+ &old_gtty.class, 12, 0, 0, 0, 0);
+#else /* not VMS */
+#ifndef HAVE_TCATTR
+ while (ioctl (0, TCSETAW, &old_gtty) < 0 && errno == EINTR);
+#else
+ while (tcsetattr (0, TCSADRAIN, &old_gtty) < 0 && errno == EINTR);
+#endif
+#endif /* not VMS */
+
+#ifdef AIX
+ hft_reset ();
+#endif
+}
+\f
+#ifdef HAVE_PTYS
+
+/* Set up the proper status flags for use of a pty. */
+
+setup_pty (fd)
+ int fd;
+{
+ /* I'm told that TOICREMOTE does not mean control chars
+ "can't be sent" but rather that they don't have
+ input-editing or signaling effects.
+ That should be good, because we have other ways
+ to do those things in Emacs.
+ However, telnet mode seems not to work on 4.2.
+ So TIOCREMOTE is turned off now. */
+
+ /* Under hp-ux, if TIOCREMOTE is turned on, some calls
+ will hang. In particular, the "timeout" feature (which
+ causes a read to return if there is no data available)
+ does this. Also it is known that telnet mode will hang
+ in such a way that Emacs must be stopped (perhaps this
+ is the same problem).
+
+ If TIOCREMOTE is turned off, then there is a bug in
+ hp-ux which sometimes loses data. Apparently the
+ code which blocks the master process when the internal
+ buffer fills up does not work. Other than this,
+ though, everything else seems to work fine.
+
+ Since the latter lossage is more benign, we may as well
+ lose that way. -- cph */
+#ifdef FIONBIO
+#ifdef SYSV_PTYS
+ {
+ int on = 1;
+ ioctl (fd, FIONBIO, &on);
+ }
+#endif
+#endif
+#ifdef IBMRTAIX
+ /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
+ /* ignore SIGHUP once we've started a child on a pty. Note that this may */
+ /* cause EMACS not to die when it should, i.e., when its own controlling */
+ /* tty goes away. I've complained to the AIX developers, and they may */
+ /* change this behavior, but I'm not going to hold my breath. */
+ signal (SIGHUP, SIG_IGN);
+#endif
+}
+#endif /* HAVE_PTYS */
+\f
+#ifdef VMS
+
+/* Assigning an input channel is done at the start of Emacs execution.
+ This is called each time Emacs is resumed, also, but does nothing
+ because input_chain is no longer zero. */
+
+init_vms_input ()
+{
+ int status;
+
+ if (input_chan == 0)
+ {
+ status = SYS$ASSIGN (&input_dsc, &input_chan, 0, 0);
+ if (! (status & 1))
+ LIB$STOP (status);
+ }
+}
+
+/* Deassigning the input channel is done before exiting. */
+
+stop_vms_input ()
+{
+ return SYS$DASSGN (input_chan);
+}
+
+short input_buffer;
+
+/* Request reading one character into the keyboard buffer.
+ This is done as soon as the buffer becomes empty. */
+
+queue_kbd_input ()
+{
+ int status;
+ waiting_for_ast = 0;
+ stop_input = 0;
+ status = SYS$QIO (0, input_chan, IO$_READVBLK,
+ &input_iosb, kbd_input_ast, 1,
+ &input_buffer, 1, 0, terminator_mask, 0, 0);
+}
+
+int input_count;
+
+/* Ast routine that is called when keyboard input comes in
+ in accord with the SYS$QIO above. */
+
+kbd_input_ast ()
+{
+ register int c = -1;
+ int old_errno = errno;
+ extern int *input_available_clear_word;
+
+ if (waiting_for_ast)
+ SYS$SETEF (input_ef);
+ waiting_for_ast = 0;
+ input_count++;
+#ifdef ASTDEBUG
+ if (input_count == 25)
+ exit (1);
+ printf ("Ast # %d,", input_count);
+ printf (" iosb = %x, %x, %x, %x",
+ input_iosb.offset, input_iosb.status, input_iosb.termlen,
+ input_iosb.term);
+#endif
+ if (input_iosb.offset)
+ {
+ c = input_buffer;
+#ifdef ASTDEBUG
+ printf (", char = 0%o", c);
+#endif
+ }
+#ifdef ASTDEBUG
+ printf ("\n");
+ fflush (stdout);
+ sleep (1);
+#endif
+ if (! stop_input)
+ queue_kbd_input ();
+ if (c >= 0)
+ {
+ struct input_event e;
+ e.kind = ascii_keystroke;
+ XSET (buf[i].code, Lisp_Int, cbuf[i]);
+ e.screen = selected_screen;
+ kbd_buffer_store_event (&e);
+ }
+
+ if (input_available_clear_word)
+ *input_available_clear_word = 0;
+ errno = old_errno;
+}
+
+/* Wait until there is something in kbd_buffer. */
+
+wait_for_kbd_input ()
+{
+ extern int have_process_input, process_exited;
+
+ /* If already something, avoid doing system calls. */
+ if (detect_input_pending ())
+ {
+ return;
+ }
+ /* Clear a flag, and tell ast routine above to set it. */
+ SYS$CLREF (input_ef);
+ waiting_for_ast = 1;
+ /* Check for timing error: ast happened while we were doing that. */
+ if (!detect_input_pending ())
+ {
+ /* No timing error: wait for flag to be set. */
+ set_waiting_for_input (0);
+ SYS$WFLOR (input_ef, input_eflist);
+ clear_waiting_for_input (0);
+ if (!detect_input_pending ())
+ /* Check for subprocess input availability */
+ {
+ int dsp = have_process_input || process_exited;
+
+ SYS$CLREF (process_ef);
+ if (have_process_input)
+ process_command_input ();
+ if (process_exited)
+ process_exit ();
+ if (dsp)
+ {
+ update_mode_lines++;
+ redisplay_preserve_echo_area ();
+ }
+ }
+ }
+ waiting_for_ast = 0;
+}
+
+/* Get rid of any pending QIO, when we are about to suspend
+ or when we want to throw away pending input.
+ We wait for a positive sign that the AST routine has run
+ and therefore there is no I/O request queued when we return.
+ SYS$SETAST is used to avoid a timing error. */
+
+end_kbd_input ()
+{
+#ifdef ASTDEBUG
+ printf ("At end_kbd_input.\n");
+ fflush (stdout);
+ sleep (1);
+#endif
+ if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
+ {
+ SYS$CANCEL (input_chan);
+ return;
+ }
+
+ SYS$SETAST (0);
+ /* Clear a flag, and tell ast routine above to set it. */
+ SYS$CLREF (input_ef);
+ waiting_for_ast = 1;
+ stop_input = 1;
+ SYS$CANCEL (input_chan);
+ SYS$SETAST (1);
+ SYS$WAITFR (input_ef);
+ waiting_for_ast = 0;
+}
+
+/* Wait for either input available or time interval expiry. */
+
+input_wait_timeout (timeval)
+ int timeval; /* Time to wait, in seconds */
+{
+ int time [2];
+ static int zero = 0;
+ static int large = -10000000;
+
+ LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
+
+ /* If already something, avoid doing system calls. */
+ if (detect_input_pending ())
+ {
+ return;
+ }
+ /* Clear a flag, and tell ast routine above to set it. */
+ SYS$CLREF (input_ef);
+ waiting_for_ast = 1;
+ /* Check for timing error: ast happened while we were doing that. */
+ if (!detect_input_pending ())
+ {
+ /* No timing error: wait for flag to be set. */
+ SYS$CANTIM (1, 0);
+ if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
+ SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
+ }
+ waiting_for_ast = 0;
+}
+
+/* The standard `sleep' routine works some other way
+ and it stops working if you have ever quit out of it.
+ This one continues to work. */
+
+sys_sleep (timeval)
+ int timeval;
+{
+ int time [2];
+ static int zero = 0;
+ static int large = -10000000;
+
+ LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
+
+ SYS$CANTIM (1, 0);
+ if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
+ SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
+}
+
+init_sigio ()
+{
+ request_sigio ();
+}
+
+reset_sigio ()
+{
+ unrequest_sigio ();
+}
+
+request_sigio ()
+{
+ croak ("request sigio");
+}
+
+unrequest_sigio ()
+{
+ croak ("unrequest sigio");
+}
+
+#endif /* VMS */
+\f
+/* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
+#ifndef CANNOT_DUMP
+#define NEED_STARTS
+#endif
+
+#ifndef SYSTEM_MALLOC
+#ifndef NEED_STARTS
+#define NEED_STARTS
+#endif
+#endif
+
+#ifdef NEED_STARTS
+/* Some systems that cannot dump also cannot implement these. */
+
+/*
+ * Return the address of the start of the text segment prior to
+ * doing an unexec. After unexec the return value is undefined.
+ * See crt0.c for further explanation and _start.
+ *
+ */
+
+#ifndef CANNOT_UNEXEC
+char *
+start_of_text ()
+{
+#ifdef TEXT_START
+ return ((char *) TEXT_START);
+#else
+#ifdef GOULD
+ extern csrt ();
+ return ((char *) csrt);
+#else /* not GOULD */
+ extern int _start ();
+ return ((char *) _start);
+#endif /* GOULD */
+#endif /* TEXT_START */
+}
+#endif /* not CANNOT_UNEXEC */
+
+/*
+ * Return the address of the start of the data segment prior to
+ * doing an unexec. After unexec the return value is undefined.
+ * See crt0.c for further information and definition of data_start.
+ *
+ * Apparently, on BSD systems this is etext at startup. On
+ * USG systems (swapping) this is highly mmu dependent and
+ * is also dependent on whether or not the program is running
+ * with shared text. Generally there is a (possibly large)
+ * gap between end of text and start of data with shared text.
+ *
+ * On Uniplus+ systems with shared text, data starts at a
+ * fixed address. Each port (from a given oem) is generally
+ * different, and the specific value of the start of data can
+ * be obtained via the UniPlus+ specific "uvar" system call,
+ * however the method outlined in crt0.c seems to be more portable.
+ *
+ * Probably what will have to happen when a USG unexec is available,
+ * at least on UniPlus, is temacs will have to be made unshared so
+ * that text and data are contiguous. Then once loadup is complete,
+ * unexec will produce a shared executable where the data can be
+ * at the normal shared text boundry and the startofdata variable
+ * will be patched by unexec to the correct value.
+ *
+ */
+
+char *
+start_of_data ()
+{
+#ifdef DATA_START
+ return ((char *) DATA_START);
+#else
+ extern int data_start;
+ return ((char *) &data_start);
+#endif
+}
+#endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
+
+#ifndef CANNOT_DUMP
+/* Some systems that cannot dump also cannot implement these. */
+
+/*
+ * Return the address of the end of the text segment prior to
+ * doing an unexec. After unexec the return value is undefined.
+ */
+
+char *
+end_of_text ()
+{
+#ifdef TEXT_END
+ return ((char *) TEXT_END);
+#else
+ extern int etext;
+ return ((char *) &etext);
+#endif
+}
+
+/*
+ * Return the address of the end of the data segment prior to
+ * doing an unexec. After unexec the return value is undefined.
+ */
+
+char *
+end_of_data ()
+{
+#ifdef DATA_END
+ return ((char *) DATA_END);
+#else
+ extern int edata;
+ return ((char *) &edata);
+#endif
+}
+
+#endif /* not CANNOT_DUMP */
+\f
+/* Get_system_name returns as its value
+ a string for the Lisp function system-name to return. */
+
+#ifdef BSD4_1
+#include <whoami.h>
+#endif
+
+#ifdef USG
+/* Can't have this within the function since `static' is #defined to nothing */
+static struct utsname get_system_name_name;
+#endif
+
+char *
+get_system_name ()
+{
+#ifdef USG
+ uname (&get_system_name_name);
+ return (get_system_name_name.nodename);
+#else /* Not USG */
+#ifdef BSD4_1
+ return sysname;
+#else /* not USG, not 4.1 */
+ static char system_name_saved[32];
+#ifdef VMS
+ char *sp;
+ if ((sp = egetenv ("SYS$NODE")) == 0)
+ sp = "vax-vms";
+ else
+ {
+ char *end;
+
+ if ((end = index (sp, ':')) != 0)
+ *end = '\0';
+ }
+ strcpy (system_name_saved, sp);
+#else /* not VMS */
+ gethostname (system_name_saved, sizeof (system_name_saved));
+#endif /* not VMS */
+ return system_name_saved;
+#endif /* not USG, not 4.1 */
+#endif /* not USG */
+}
+\f
+#ifndef VMS
+#ifndef HAVE_SELECT
+
+#ifdef HAVE_X_WINDOWS
+/* Cause explanatory error message at compile time,
+ since the select emulation is not good enough for X. */
+int *x = &x_windows_lose_if_no_select_system_call;
+#endif
+
+/* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
+ * Only checks read descriptors.
+ */
+/* How long to wait between checking fds in select */
+#define SELECT_PAUSE 1
+int select_alarmed;
+
+/* For longjmp'ing back to read_input_waiting. */
+
+jmp_buf read_alarm_throw;
+
+/* Nonzero if the alarm signal should throw back to read_input_waiting.
+ The read_socket_hook function sets this to 1 while it is waiting. */
+
+int read_alarm_should_throw;
+
+SIGTYPE
+select_alarm ()
+{
+ select_alarmed = 1;
+#ifdef BSD4_1
+ sigrelse (SIGALRM);
+#else /* not BSD4_1 */
+ signal (SIGALRM, SIG_IGN);
+#endif /* not BSD4_1 */
+ if (read_alarm_should_throw)
+ longjmp (read_alarm_throw, 1);
+}
+
+/* Only rfds are checked. */
+int
+select (nfds, rfds, wfds, efds, timeout)
+ int nfds;
+ int *rfds, *wfds, *efds, *timeout;
+{
+ int ravail = 0, orfds = 0, old_alarm;
+ int timeoutval = timeout ? *timeout : 100000;
+ int *local_timeout = &timeoutval;
+ extern int proc_buffered_char[];
+#ifndef subprocesses
+ int process_tick = 0, update_tick = 0;
+#else
+ extern int process_tick, update_tick;
+#endif
+ SIGTYPE (*old_trap) ();
+ unsigned char buf;
+
+ if (rfds)
+ {
+ orfds = *rfds;
+ *rfds = 0;
+ }
+ if (wfds)
+ *wfds = 0;
+ if (efds)
+ *efds = 0;
+
+ /* If we are looking only for the terminal, with no timeout,
+ just read it and wait -- that's more efficient. */
+ if (orfds == 1 && *local_timeout == 100000 && process_tick == update_tick)
+ {
+ if (! detect_input_pending ())
+ read_input_waiting ();
+ *rfds = 1;
+ return 1;
+ }
+
+ /* Once a second, till the timer expires, check all the flagged read
+ * descriptors to see if any input is available. If there is some then
+ * set the corresponding bit in the return copy of rfds.
+ */
+ while (1)
+ {
+ register int to_check, bit, fd;
+
+ if (rfds)
+ {
+ for (to_check = nfds, bit = 1, fd = 0; --to_check >= 0; bit <<= 1, fd++)
+ {
+ if (orfds & bit)
+ {
+ int avail = 0, status = 0;
+
+ if (bit == 1)
+ avail = detect_input_pending (); /* Special keyboard handler */
+ else
+ {
+#ifdef FIONREAD
+ status = ioctl (fd, FIONREAD, &avail);
+#else /* no FIONREAD */
+ /* Hoping it will return -1 if nothing available
+ or 0 if all 0 chars requested are read. */
+ if (proc_buffered_char[fd] >= 0)
+ avail = 1;
+ else
+ {
+ avail = read (fd, &buf, 1);
+ if (avail > 0)
+ proc_buffered_char[fd] = buf;
+ }
+#endif /* no FIONREAD */
+ }
+ if (status >= 0 && avail > 0)
+ {
+ (*rfds) |= bit;
+ ravail++;
+ }
+ }
+ }
+ }
+ if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
+ break;
+ old_alarm = alarm (0);
+ old_trap = (int (*)()) signal (SIGALRM, select_alarm);
+ select_alarmed = 0;
+ alarm (SELECT_PAUSE);
+ /* Wait for a SIGALRM (or maybe a SIGTINT) */
+ while (select_alarmed == 0 && *local_timeout != 0
+ && process_tick == update_tick)
+ {
+ /* If we are interested in terminal input,
+ wait by reading the terminal.
+ That makes instant wakeup for terminal input at least. */
+ if (orfds & 1)
+ {
+ read_input_waiting ();
+ if (detect_input_pending ())
+ select_alarmed = 1;
+ }
+ else
+ pause ();
+ }
+ (*local_timeout) -= SELECT_PAUSE;
+ /* Reset the old alarm if there was one */
+ alarm (0);
+ signal (SIGALRM, old_trap);
+ if (old_alarm != 0)
+ {
+ /* Reset or forge an interrupt for the original handler. */
+ old_alarm -= SELECT_PAUSE;
+ if (old_alarm <= 0)
+ kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
+ else
+ alarm (old_alarm);
+ }
+ if (*local_timeout == 0) /* Stop on timer being cleared */
+ break;
+ }
+ return ravail;
+}
+
+/* Read keyboard input into the standard buffer,
+ waiting for at least one character. */
+
+/* Make all keyboard buffers much bigger when using X windows. */
+#ifdef HAVE_X_WINDOWS
+#define BUFFER_SIZE_FACTOR 16
+#else
+#define BUFFER_SIZE_FACTOR 1
+#endif
+
+read_input_waiting ()
+{
+ char buf[256 * BUFFER_SIZE_FACTOR];
+ struct input_event e;
+ int nread;
+
+ if (read_socket_hook)
+ {
+ read_alarm_should_throw = 0;
+ if (! setjmp (read_alarm_throw))
+ nread = (*read_socket_hook) (0, buf, 256 * BUFFER_SIZE_FACTOR, 1, 0);
+ else
+ nread = -1;
+ }
+ else
+ nread = read (fileno (stdin), buf, 1);
+
+ /* Scan the chars for C-g and store them in kbd_buffer. */
+ e.kind = ascii_keystroke;
+ e.screen = selected_screen;
+ for (i = 0; i < nread; i++)
+ {
+ XSET (e.code, Lisp_Int, buf[i]);
+ kbd_buffer_store_event (&e);
+ /* Don't look at input that follows a C-g too closely.
+ This reduces lossage due to autorepeat on C-g. */
+ if (buf[i] == Ctl ('G'))
+ break;
+ }
+}
+
+#endif /* not HAVE_SELECT */
+#endif /* not VMS */
+\f
+#ifdef BSD4_1
+/* VARARGS */
+setpriority ()
+{
+ return 0;
+}
+
+/*
+ * Partially emulate 4.2 open call.
+ * open is defined as this in 4.1.
+ *
+ * - added by Michael Bloom @ Citicorp/TTI
+ *
+ */
+
+int
+sys_open (path, oflag, mode)
+ char *path;
+ int oflag, mode;
+{
+ if (oflag & O_CREAT)
+ return creat (path, mode);
+ else
+ return open (path, oflag);
+}
+
+init_sigio ()
+{
+ if (noninteractive)
+ return;
+ lmode = LINTRUP | lmode;
+ ioctl (0, TIOCLSET, &lmode);
+}
+
+reset_sigio ()
+{
+ if (noninteractive)
+ return;
+ lmode = ~LINTRUP & lmode;
+ ioctl (0, TIOCLSET, &lmode);
+}
+
+request_sigio ()
+{
+ sigrelse (SIGTINT);
+
+ interrupts_deferred = 0;
+}
+
+unrequest_sigio ()
+{
+ sighold (SIGTINT);
+
+ interrupts_deferred = 1;
+}
+
+/* still inside #ifdef BSD4_1 */
+#ifdef subprocesses
+
+int sigheld; /* Mask of held signals */
+
+sigholdx (signum)
+ int signum;
+{
+ sigheld |= sigbit (signum);
+ sighold (signum);
+}
+
+sigisheld (signum)
+ int signum;
+{
+ sigheld |= sigbit (signum);
+}
+
+sigunhold (signum)
+ int signum;
+{
+ sigheld &= ~sigbit (signum);
+ sigrelse (signum);
+}
+
+sigfree () /* Free all held signals */
+{
+ int i;
+ for (i = 0; i < NSIG; i++)
+ if (sigheld & sigbit (i))
+ sigrelse (i);
+ sigheld = 0;
+}
+
+sigbit (i)
+{
+ return 1 << (i - 1);
+}
+#endif /* subprocesses */
+#endif /* BSD4_1 */
+\f
+/* POSIX signals support - DJB */
+/* Anyone with POSIX signals should have ANSI C declarations */
+
+#ifdef POSIX_SIGNALS
+
+sigset_t old_mask, empty_mask, full_mask, temp_mask;
+static struct sigaction new_action, old_action;
+
+init_signals ()
+{
+#ifdef POSIX_SIGNALS
+ sigemptyset (&signal_empty_mask);
+ sigfillset (&signal_full_mask);
+#endif
+}
+
+int (*signal_handler_t) ();
+
+signal_handler_t
+sys_signal (int signal_number, signal_handler_t action)
+{
+#ifdef DGUX
+ /* This gets us restartable system calls for efficiency.
+ The "else" code will works as well. */
+ return (berk_signal (signal_number, action));
+#else
+ sigemptyset (&new_action.sa_mask);
+ new_action.sa_handler = action;
+ new_action.sa_flags = NULL;
+ new_action (signal_number, &new_action, &old_action);
+ return (old_action.sa_handler);
+#endif /* DGUX */
+}
+
+int
+sys_sigpause (sigset_t new_mask)
+{
+ /* pause emulating berk sigpause... */
+ sigsuspend (&new_mask);
+ return (EINTR);
+}
+
+/* I'd like to have these guys return pointers to the mask storage in here,
+ but there'd be trouble if the code was saving multiple masks. I'll be
+ safe and pass the structure. It normally won't be more than 2 bytes
+ anyhow. - DJB */
+
+sigset_t
+sys_sigblock (sigset_t new_mask)
+{
+ sigset_t old_mask;
+ sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
+ return (old_mask);
+}
+
+sigset_t
+sys_sigunblock (sigset_t new_mask)
+{
+ sigset_t old_mask;
+ sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
+ return (old_mask);
+}
+
+sigset_t
+sys_sigsetmask (sigset_t new_mask)
+{
+ sigset_t old_mask;
+ sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
+ return (old_mask);
+}
+
+#endif /* POSIX_SIGNALS */
+\f
+#ifndef BSTRING
+
+void
+bzero (b, length)
+ register char *b;
+ register int length;
+{
+#ifdef VMS
+ short zero = 0;
+ long max_str = 65535;
+
+ while (length > max_str) {
+ (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
+ length -= max_str;
+ b += max_str;
+ }
+ max_str = length;
+ (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
+#else
+ while (length-- > 0)
+ *b++ = 0;
+#endif /* not VMS */
+}
+
+/* Saying `void' requires a declaration, above, where bcopy is used
+ and that declaration causes pain for systems where bcopy is a macro. */
+bcopy (b1, b2, length)
+ register char *b1;
+ register char *b2;
+ register int length;
+{
+#ifdef VMS
+ long max_str = 65535;
+
+ while (length > max_str) {
+ (void) LIB$MOVC3 (&max_str, b1, b2);
+ length -= max_str;
+ b1 += max_str;
+ b2 += max_str;
+ }
+ max_str = length;
+ (void) LIB$MOVC3 (&length, b1, b2);
+#else
+ while (length-- > 0)
+ *b2++ = *b1++;
+#endif /* not VMS */
+}
+
+int
+bcmp (b1, b2, length) /* This could be a macro! */
+ register char *b1;
+ register char *b2;
+ register int length;
+{
+#ifdef VMS
+ struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
+ struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
+
+ return STR$COMPARE (&src1, &src2);
+#else
+ while (length-- > 0)
+ if (*b1++ != *b2++)
+ return 1;
+
+ return 0;
+#endif /* not VMS */
+}
+#endif /* not BSTRING */
+\f
+#ifdef USG
+/*
+ * The BSD random returns numbers in the range of
+ * 0 to 2e31 - 1. The USG rand returns numbers in the
+ * range of 0 to 2e15 - 1. This is probably not significant
+ * in this usage.
+ */
+
+long
+random ()
+{
+ /* Arrange to return a range centered on zero. */
+ return (rand () << 15) + rand () - (1 << 29);
+}
+
+srandom (arg)
+ int arg;
+{
+ srand (arg);
+}
+
+#endif /* USG */
+
+#ifdef BSD4_1
+long random ()
+{
+ /* Arrange to return a range centered on zero. */
+ return (rand () << 15) + rand () - (1 << 29);
+}
+
+srandom (arg)
+ int arg;
+{
+ srand (arg);
+}
+#endif /* BSD4_1 */
+\f
+#ifdef WRONG_NAME_INSQUE
+
+insque (q,p)
+ caddr_t q,p;
+{
+ _insque (q,p);
+}
+
+#endif
+\f
+#ifdef VMS
+
+#ifdef getenv
+/* If any place else asks for the TERM variable,
+ allow it to be overridden with the EMACS_TERM variable
+ before attempting to translate the logical name TERM. As a last
+ resort, ask for VAX C's special idea of the TERM variable. */
+#undef getenv
+char *
+sys_getenv (name)
+ char *name;
+{
+ register char *val;
+ static char buf[256];
+ static struct dsc$descriptor_s equiv
+ = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
+ static struct dsc$descriptor_s d_name
+ = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
+ short eqlen;
+
+ if (!strcmp (name, "TERM"))
+ {
+ val = (char *) getenv ("EMACS_TERM");
+ if (val)
+ return val;
+ }
+
+ d_name.dsc$w_length = strlen (name);
+ d_name.dsc$a_pointer = name;
+ if (lib$sys_trnlog (&d_name, &eqlen, &equiv) == 1)
+ {
+ char *str = (char *) xmalloc (eqlen + 1);
+ bcopy (buf, str, eqlen);
+ str[eqlen] = '\0';
+ /* This is a storage leak, but a pain to fix. With luck,
+ no one will ever notice. */
+ return str;
+ }
+ return (char *) getenv (name);
+}
+#endif /* getenv */
+
+#ifdef abort
+/* Since VMS doesn't believe in core dumps, the only way to debug this beast is
+ to force a call on the debugger from within the image. */
+#undef abort
+sys_abort ()
+{
+ reset_sys_modes ();
+ LIB$SIGNAL (SS$_DEBUG);
+}
+#endif /* abort */
+#endif /* VMS */
+\f
+#ifdef VMS
+#ifdef LINK_CRTL_SHARE
+#ifdef SHAREABLE_LIB_BUG
+/* Variables declared noshare and initialized in shareable libraries
+ cannot be shared. The VMS linker incorrectly forces you to use a private
+ version which is uninitialized... If not for this "feature", we
+ could use the C library definition of sys_nerr and sys_errlist. */
+int sys_nerr = 35;
+char *sys_errlist[] =
+ {
+ "error 0",
+ "not owner",
+ "no such file or directory",
+ "no such process",
+ "interrupted system call",
+ "i/o error",
+ "no such device or address",
+ "argument list too long",
+ "exec format error",
+ "bad file number",
+ "no child process",
+ "no more processes",
+ "not enough memory",
+ "permission denied",
+ "bad address",
+ "block device required",
+ "mount devices busy",
+ "file exists",
+ "cross-device link",
+ "no such device",
+ "not a directory",
+ "is a directory",
+ "invalid argument",
+ "file table overflow",
+ "too many open files",
+ "not a typewriter",
+ "text file busy",
+ "file too big",
+ "no space left on device",
+ "illegal seek",
+ "read-only file system",
+ "too many links",
+ "broken pipe",
+ "math argument",
+ "result too large",
+ "I/O stream empty",
+ "vax/vms specific error code nontranslatable error"
+ };
+#endif /* SHAREABLE_LIB_BUG */
+#endif /* LINK_CRTL_SHARE */
+#endif /* VMS */
+\f
+#ifdef INTERRUPTIBLE_OPEN
+
+int
+/* VARARGS 2 */
+sys_open (path, oflag, mode)
+ char *path;
+ int oflag, mode;
+{
+ register int rtnval;
+
+ while ((rtnval = open (path, oflag, mode)) == -1
+ && (errno == EINTR));
+ return (rtnval);
+}
+
+#endif /* INTERRUPTIBLE_OPEN */
+
+#ifdef INTERRUPTIBLE_CLOSE
+
+sys_close (fd)
+ int fd;
+{
+ register int rtnval;
+
+ while ((rtnval = close (fd)) == -1
+ && (errno == EINTR));
+ return rtnval;
+}
+
+#endif /* INTERRUPTIBLE_CLOSE */
+
+#ifdef INTERRUPTIBLE_IO
+
+int
+sys_read (fildes, buf, nbyte)
+ int fildes;
+ char *buf;
+ unsigned int nbyte;
+{
+ register int rtnval;
+
+ while ((rtnval = read (fildes, buf, nbyte)) == -1
+ && (errno == EINTR));
+ return (rtnval);
+}
+
+int
+sys_write (fildes, buf, nbyte)
+ int fildes;
+ char *buf;
+ unsigned int nbyte;
+{
+ register int rtnval;
+
+ while ((rtnval = write (fildes, buf, nbyte)) == -1
+ && (errno == EINTR));
+ return (rtnval);
+}
+
+#endif /* INTERRUPTIBLE_IO */
+\f
+#ifdef USG
+/*
+ * All of the following are for USG.
+ *
+ * On USG systems the system calls are INTERRUPTIBLE by signals
+ * that the user program has elected to catch. Thus the system call
+ * must be retried in these cases. To handle this without massive
+ * changes in the source code, we remap the standard system call names
+ * to names for our own functions in sysdep.c that do the system call
+ * with retries. Actually, for portability reasons, it is good
+ * programming practice, as this example shows, to limit all actual
+ * system calls to a single occurance in the source. Sure, this
+ * adds an extra level of function call overhead but it is almost
+ * always negligible. Fred Fish, Unisoft Systems Inc.
+ */
+
+char *sys_siglist[NSIG + 1] =
+{
+#ifdef AIX
+/* AIX has changed the signals a bit */
+ "bogus signal", /* 0 */
+ "hangup", /* 1 SIGHUP */
+ "interrupt", /* 2 SIGINT */
+ "quit", /* 3 SIGQUIT */
+ "illegal instruction", /* 4 SIGILL */
+ "trace trap", /* 5 SIGTRAP */
+ "IOT instruction", /* 6 SIGIOT */
+ "crash likely", /* 7 SIGDANGER */
+ "floating point exception", /* 8 SIGFPE */
+ "kill", /* 9 SIGKILL */
+ "bus error", /* 10 SIGBUS */
+ "segmentation violation", /* 11 SIGSEGV */
+ "bad argument to system call", /* 12 SIGSYS */
+ "write on a pipe with no one to read it", /* 13 SIGPIPE */
+ "alarm clock", /* 14 SIGALRM */
+ "software termination signum", /* 15 SIGTERM */
+ "user defined signal 1", /* 16 SIGUSR1 */
+ "user defined signal 2", /* 17 SIGUSR2 */
+ "death of a child", /* 18 SIGCLD */
+ "power-fail restart", /* 19 SIGPWR */
+ "bogus signal", /* 20 */
+ "bogus signal", /* 21 */
+ "bogus signal", /* 22 */
+ "bogus signal", /* 23 */
+ "bogus signal", /* 24 */
+ "LAN I/O interrupt", /* 25 SIGAIO */
+ "PTY I/O interrupt", /* 26 SIGPTY */
+ "I/O intervention required", /* 27 SIGIOINT */
+ "HFT grant", /* 28 SIGGRANT */
+ "HFT retract", /* 29 SIGRETRACT */
+ "HFT sound done", /* 30 SIGSOUND */
+ "HFT input ready", /* 31 SIGMSG */
+#else /* not AIX */
+ "bogus signal", /* 0 */
+ "hangup", /* 1 SIGHUP */
+ "interrupt", /* 2 SIGINT */
+ "quit", /* 3 SIGQUIT */
+ "illegal instruction", /* 4 SIGILL */
+ "trace trap", /* 5 SIGTRAP */
+ "IOT instruction", /* 6 SIGIOT */
+ "EMT instruction", /* 7 SIGEMT */
+ "floating point exception", /* 8 SIGFPE */
+ "kill", /* 9 SIGKILL */
+ "bus error", /* 10 SIGBUS */
+ "segmentation violation", /* 11 SIGSEGV */
+ "bad argument to system call", /* 12 SIGSYS */
+ "write on a pipe with no one to read it", /* 13 SIGPIPE */
+ "alarm clock", /* 14 SIGALRM */
+ "software termination signum", /* 15 SIGTERM */
+ "user defined signal 1", /* 16 SIGUSR1 */
+ "user defined signal 2", /* 17 SIGUSR2 */
+ "death of a child", /* 18 SIGCLD */
+ "power-fail restart", /* 19 SIGPWR */
+#endif /* not AIX */
+ 0
+ };
+
+/*
+ * Warning, this function may not duplicate 4.2 action properly
+ * under error conditions.
+ */
+
+#ifndef MAXPATHLEN
+/* In 4.1, param.h fails to define this. */
+#define MAXPATHLEN 1024
+#endif
+
+#ifndef HAVE_GETWD
+
+char *
+getwd (pathname)
+ char *pathname;
+{
+ char *npath, *spath;
+ extern char *getcwd ();
+
+ spath = npath = getcwd ((char *) 0, MAXPATHLEN);
+ /* On Altos 3068, getcwd can return @hostname/dir, so discard
+ up to first slash. Should be harmless on other systems. */
+ while (*npath && *npath != '/')
+ npath++;
+ strcpy (pathname, npath);
+ free (spath); /* getcwd uses malloc */
+ return pathname;
+}
+
+#endif /* HAVE_GETWD */
+
+/*
+ * Emulate rename using unlink/link. Note that this is
+ * only partially correct. Also, doesn't enforce restriction
+ * that files be of same type (regular->regular, dir->dir, etc).
+ */
+
+rename (from, to)
+ char *from;
+ char *to;
+{
+ if (access (from, 0) == 0)
+ {
+ unlink (to);
+ if (link (from, to) == 0)
+ if (unlink (from) == 0)
+ return (0);
+ }
+ return (-1);
+}
+
+/* Set priority value to PRIO. */
+
+void
+setpriority (which, who, prio)
+ int which, who, prio;
+{
+ int nice ();
+
+ nice (prio - nice (0));
+ return (0);
+}
+
+#ifndef HAVE_VFORK
+
+/*
+ * Substitute fork for vfork on USG flavors.
+ */
+
+vfork ()
+{
+ return (fork ());
+}
+
+#endif /* not HAVE_VFORK */
+
+#ifdef MISSING_UTIMES
+
+/* HPUX (among others) sets HAVE_TIMEVAL but does not implement utimes. */
+
+utimes ()
+{
+}
+#endif
+
+#ifdef IRIS_UTIME
+
+/* The IRIS (3.5) has timevals, but uses sys V utime, and doesn't have the
+ utimbuf structure defined anywhere but in the man page. */
+
+struct utimbuf
+ {
+ long actime;
+ long modtime;
+ };
+
+utimes (name, tvp)
+ char *name;
+ struct timeval tvp[];
+{
+ struct utimbuf utb;
+ utb.actime = tvp[0].tv_sec;
+ utb.modtime = tvp[1].tv_sec;
+ utime (name, &utb);
+}
+#endif /* IRIS_UTIME */
+
+
+#ifdef HPUX
+#ifndef HAVE_PERROR
+
+/* HPUX curses library references perror, but as far as we know
+ it won't be called. Anyway this definition will do for now. */
+
+perror ()
+{
+}
+
+#endif /* not HAVE_PERROR */
+#endif /* HPUX */
+
+#ifndef HAVE_DUP2
+
+/*
+ * Emulate BSD dup2. First close newd if it already exists.
+ * Then, attempt to dup oldd. If not successful, call dup2 recursively
+ * until we are, then close the unsuccessful ones.
+ */
+
+dup2 (oldd, newd)
+ int oldd;
+ int newd;
+{
+ register int fd, ret;
+
+ sys_close (newd);
+
+#ifdef F_DUPFD
+ fd = fcntl (oldd, F_DUPFD, newd);
+ if (fd != newd)
+ error ("can't dup2 (%i,%i) : %s", oldd, newd, sys_errlist[errno]);
+#else
+ fd = dup (old);
+ if (fd == -1)
+ return -1;
+ if (fd == new)
+ return new;
+ ret = dup2 (old,new);
+ sys_close (fd);
+ return ret;
+#endif
+}
+
+#endif /* not HAVE_DUP2 */
+
+/*
+ * Gettimeofday. Simulate as much as possible. Only accurate
+ * to nearest second. Emacs doesn't use tzp so ignore it for now.
+ * Only needed when subprocesses are defined.
+ */
+
+#ifdef subprocesses
+#ifndef VMS
+#ifndef HAVE_GETTIMEOFDAY
+#ifdef HAVE_TIMEVAL
+
+/* ARGSUSED */
+gettimeofday (tp, tzp)
+ struct timeval *tp;
+ struct timezone *tzp;
+{
+ extern long time ();
+
+ tp->tv_sec = time ((long *)0);
+ tp->tv_usec = 0;
+ tzp->tz_minuteswest = -1;
+}
+
+#endif
+#endif
+#endif
+#endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
+
+/*
+ * This function will go away as soon as all the stubs fixed. (fnf)
+ */
+
+croak (badfunc)
+ char *badfunc;
+{
+ printf ("%s not yet implemented\r\n", badfunc);
+ reset_sys_modes ();
+ exit (1);
+}
+
+#endif /* USG */
+\f
+#ifdef DGUX
+
+char *sys_siglist[NSIG + 1] =
+{
+ "null signal", /* 0 SIGNULL */
+ "hangup", /* 1 SIGHUP */
+ "interrupt", /* 2 SIGINT */
+ "quit", /* 3 SIGQUIT */
+ "illegal instruction", /* 4 SIGILL */
+ "trace trap", /* 5 SIGTRAP */
+ "abort termination", /* 6 SIGABRT */
+ "SIGEMT", /* 7 SIGEMT */
+ "floating point exception", /* 8 SIGFPE */
+ "kill", /* 9 SIGKILL */
+ "bus error", /* 10 SIGBUS */
+ "segmentation violation", /* 11 SIGSEGV */
+ "bad argument to system call", /* 12 SIGSYS */
+ "write on a pipe with no reader", /* 13 SIGPIPE */
+ "alarm clock", /* 14 SIGALRM */
+ "software termination signal", /* 15 SIGTERM */
+ "user defined signal 1", /* 16 SIGUSR1 */
+ "user defined signal 2", /* 17 SIGUSR2 */
+ "child stopped or terminated", /* 18 SIGCLD */
+ "power-fail restart", /* 19 SIGPWR */
+ "window size changed", /* 20 SIGWINCH */
+ "undefined", /* 21 */
+ "pollable event occured", /* 22 SIGPOLL */
+ "sendable stop signal not from tty", /* 23 SIGSTOP */
+ "stop signal from tty", /* 24 SIGSTP */
+ "continue a stopped process", /* 25 SIGCONT */
+ "attempted background tty read", /* 26 SIGTTIN */
+ "attempted background tty write", /* 27 SIGTTOU */
+ "undefined", /* 28 */
+ "undefined", /* 29 */
+ "undefined", /* 30 */
+ "undefined", /* 31 */
+ "undefined", /* 32 */
+ "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
+ "I/O is possible", /* 34 SIGIO */
+ "exceeded cpu time limit", /* 35 SIGXCPU */
+ "exceeded file size limit", /* 36 SIGXFSZ */
+ "virtual time alarm", /* 37 SIGVTALRM */
+ "profiling time alarm", /* 38 SIGPROF */
+ "undefined", /* 39 */
+ "file record locks revoked", /* 40 SIGLOST */
+ "undefined", /* 41 */
+ "undefined", /* 42 */
+ "undefined", /* 43 */
+ "undefined", /* 44 */
+ "undefined", /* 45 */
+ "undefined", /* 46 */
+ "undefined", /* 47 */
+ "undefined", /* 48 */
+ "undefined", /* 49 */
+ "undefined", /* 50 */
+ "undefined", /* 51 */
+ "undefined", /* 52 */
+ "undefined", /* 53 */
+ "undefined", /* 54 */
+ "undefined", /* 55 */
+ "undefined", /* 56 */
+ "undefined", /* 57 */
+ "undefined", /* 58 */
+ "undefined", /* 59 */
+ "undefined", /* 60 */
+ "undefined", /* 61 */
+ "undefined", /* 62 */
+ "undefined", /* 63 */
+ "notification message in mess. queue", /* 64 SIGDGNOTIFY */
+ 0
+};
+
+#endif /* DGUX */
+\f
+/* Directory routines for systems that don't have them. */
+
+#ifdef SYSV_SYSTEM_DIR
+
+#include <dirent.h>
+
+#ifndef AIX
+int
+closedir (dirp)
+ register DIR *dirp; /* stream from opendir */
+{
+ sys_close (dirp->dd_fd);
+ free ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
+ free ((char *) dirp);
+}
+#endif /* not AIX */
+#endif /* SYSV_SYSTEM_DIR */
+
+#ifdef NONSYSTEM_DIR_LIBRARY
+
+DIR *
+opendir (filename)
+ char *filename; /* name of directory */
+{
+ register DIR *dirp; /* -> malloc'ed storage */
+ register int fd; /* file descriptor for read */
+ struct stat sbuf; /* result of fstat */
+
+ fd = sys_open (filename, 0);
+ if (fd < 0)
+ return 0;
+
+ if (fstat (fd, &sbuf) < 0
+ || (sbuf.st_mode & S_IFMT) != S_IFDIR
+ || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
+ {
+ sys_close (fd);
+ return 0; /* bad luck today */
+ }
+
+ dirp->dd_fd = fd;
+ dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
+
+ return dirp;
+}
+
+void
+closedir (dirp)
+ register DIR *dirp; /* stream from opendir */
+{
+ sys_close (dirp->dd_fd);
+ free ((char *) dirp);
+}
+
+
+#ifndef VMS
+#define DIRSIZ 14
+struct olddir
+ {
+ ino_t od_ino; /* inode */
+ char od_name[DIRSIZ]; /* filename */
+ };
+#endif /* not VMS */
+
+struct direct dir_static; /* simulated directory contents */
+
+/* ARGUSED */
+struct direct *
+readdir (dirp)
+ register DIR *dirp; /* stream from opendir */
+{
+#ifndef VMS
+ register struct olddir *dp; /* -> directory data */
+#else /* VMS */
+ register struct dir$_name *dp; /* -> directory data */
+ register struct dir$_version *dv; /* -> version data */
+#endif /* VMS */
+
+ for (; ;)
+ {
+ if (dirp->dd_loc >= dirp->dd_size)
+ dirp->dd_loc = dirp->dd_size = 0;
+
+ if (dirp->dd_size == 0 /* refill buffer */
+ && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
+ return 0;
+
+#ifndef VMS
+ dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
+ dirp->dd_loc += sizeof (struct olddir);
+
+ if (dp->od_ino != 0) /* not deleted entry */
+ {
+ dir_static.d_ino = dp->od_ino;
+ strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
+ dir_static.d_name[DIRSIZ] = '\0';
+ dir_static.d_namlen = strlen (dir_static.d_name);
+ dir_static.d_reclen = sizeof (struct direct)
+ - MAXNAMLEN + 3
+ + dir_static.d_namlen - dir_static.d_namlen % 4;
+ return &dir_static; /* -> simulated structure */
+ }
+#else /* VMS */
+ dp = (struct dir$_name *) dirp->dd_buf;
+ if (dirp->dd_loc == 0)
+ dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
+ : dp->dir$b_namecount;
+ dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
+ dir_static.d_ino = dv->dir$w_fid_num;
+ dir_static.d_namlen = dp->dir$b_namecount;
+ dir_static.d_reclen = sizeof (struct direct)
+ - MAXNAMLEN + 3
+ + dir_static.d_namlen - dir_static.d_namlen % 4;
+ strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
+ dir_static.d_name[dir_static.d_namlen] = '\0';
+ dirp->dd_loc = dirp->dd_size; /* only one record at a time */
+ return &dir_static;
+#endif /* VMS */
+ }
+}
+
+#ifdef VMS
+/* readdirver is just like readdir except it returns all versions of a file
+ as separate entries. */
+
+/* ARGUSED */
+struct direct *
+readdirver (dirp)
+ register DIR *dirp; /* stream from opendir */
+{
+ register struct dir$_name *dp; /* -> directory data */
+ register struct dir$_version *dv; /* -> version data */
+
+ if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
+ dirp->dd_loc = dirp->dd_size = 0;
+
+ if (dirp->dd_size == 0 /* refill buffer */
+ && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
+ return 0;
+
+ dp = (struct dir$_name *) dirp->dd_buf;
+ if (dirp->dd_loc == 0)
+ dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
+ : dp->dir$b_namecount;
+ dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
+ strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
+ sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
+ dir_static.d_namlen = strlen (dir_static.d_name);
+ dir_static.d_ino = dv->dir$w_fid_num;
+ dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
+ + dir_static.d_namlen - dir_static.d_namlen % 4;
+ dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
+ return &dir_static;
+}
+
+#endif /* VMS */
+
+#endif /* NONSYSTEM_DIR_LIBRARY */
+\f
+/* Functions for VMS */
+#ifdef VMS
+#include "pwd.h"
+#include <acldef.h>
+#include <chpdef.h>
+#include <jpidef.h>
+
+/* Return as a string the VMS error string pertaining to STATUS.
+ Reuses the same static buffer each time it is called. */
+
+char *
+vmserrstr (status)
+ int status; /* VMS status code */
+{
+ int bufadr[2];
+ short len;
+ static char buf[257];
+
+ bufadr[0] = sizeof buf - 1;
+ bufadr[1] = (int) buf;
+ if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
+ return "untranslatable VMS error status";
+ buf[len] = '\0';
+ return buf;
+}
+
+#ifdef access
+#undef access
+
+/* The following is necessary because 'access' emulation by VMS C (2.0) does
+ * not work correctly. (It also doesn't work well in version 2.3.)
+ */
+
+#ifdef VMS4_4
+
+#define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
+ { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
+
+typedef union {
+ struct {
+ unsigned short s_buflen;
+ unsigned short s_code;
+ char *s_bufadr;
+ unsigned short *s_retlenadr;
+ } s;
+ int end;
+} item;
+#define buflen s.s_buflen
+#define code s.s_code
+#define bufadr s.s_bufadr
+#define retlenadr s.s_retlenadr
+
+#define R_OK 4 /* test for read permission */
+#define W_OK 2 /* test for write permission */
+#define X_OK 1 /* test for execute (search) permission */
+#define F_OK 0 /* test for presence of file */
+
+int
+sys_access (path, mode)
+ char *path;
+ int mode;
+{
+ static char *user = NULL;
+ char dir_fn[512];
+
+ /* translate possible directory spec into .DIR file name, so brain-dead
+ * access can treat the directory like a file. */
+ if (directory_file_name (path, dir_fn))
+ path = dir_fn;
+
+ if (mode == F_OK)
+ return access (path, mode);
+ if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
+ return -1;
+ {
+ int stat;
+ int flags;
+ int acces;
+ unsigned short int dummy;
+ item itemlst[3];
+ static int constant = ACL$C_FILE;
+ DESCRIPTOR (path_desc, path);
+ DESCRIPTOR (user_desc, user);
+
+ flags = 0;
+ acces = 0;
+ if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
+ return stat;
+ if (mode & R_OK)
+ acces |= CHP$M_READ;
+ if (mode & W_OK)
+ acces |= CHP$M_WRITE;
+ itemlst[0].buflen = sizeof (int);
+ itemlst[0].code = CHP$_FLAGS;
+ itemlst[0].bufadr = (char *) &flags;
+ itemlst[0].retlenadr = &dummy;
+ itemlst[1].buflen = sizeof (int);
+ itemlst[1].code = CHP$_ACCESS;
+ itemlst[1].bufadr = (char *) &acces;
+ itemlst[1].retlenadr = &dummy;
+ itemlst[2].end = CHP$_END;
+ stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
+ return stat == SS$_NORMAL ? 0 : -1;
+ }
+}
+
+#else /* not VMS4_4 */
+
+#include <prvdef.h>
+#define ACE$M_WRITE 2
+#define ACE$C_KEYID 1
+
+static unsigned short memid, grpid;
+static unsigned int uic;
+
+/* Called from init_sys_modes, so it happens not very often
+ but at least each time Emacs is loaded. */
+sys_access_reinit ()
+{
+ uic = 0;
+}
+
+int
+sys_access (filename, type)
+ char * filename;
+ int type;
+{
+ struct FAB fab;
+ struct XABPRO xab;
+ int status, size, i, typecode, acl_controlled;
+ unsigned int *aclptr, *aclend, aclbuf[60];
+ union prvdef prvmask;
+
+ /* Get UIC and GRP values for protection checking. */
+ if (uic == 0)
+ {
+ status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
+ if (! (status & 1))
+ return -1;
+ memid = uic & 0xFFFF;
+ grpid = uic >> 16;
+ }
+
+ if (type != 2) /* not checking write access */
+ return access (filename, type);
+
+ /* Check write protection. */
+
+#define CHECKPRIV(bit) (prvmask.bit)
+#define WRITEABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
+
+ /* Find privilege bits */
+ status = sys$setprv (0, 0, 0, prvmask);
+ if (! (status & 1))
+ error ("Unable to find privileges: %s", vmserrstr (status));
+ if (CHECKPRIV (PRV$V_BYPASS))
+ return 0; /* BYPASS enabled */
+ fab = cc$rms_fab;
+ fab.fab$b_fac = FAB$M_GET;
+ fab.fab$l_fna = filename;
+ fab.fab$b_fns = strlen (filename);
+ fab.fab$l_xab = &xab;
+ xab = cc$rms_xabpro;
+ xab.xab$l_aclbuf = aclbuf;
+ xab.xab$w_aclsiz = sizeof (aclbuf);
+ status = sys$open (&fab, 0, 0);
+ if (! (status & 1))
+ return -1;
+ sys$close (&fab, 0, 0);
+ /* Check system access */
+ if (CHECKPRIV (PRV$V_SYSPRV) && WRITEABLE (XAB$V_SYS))
+ return 0;
+ /* Check ACL entries, if any */
+ acl_controlled = 0;
+ if (xab.xab$w_acllen > 0)
+ {
+ aclptr = aclbuf;
+ aclend = &aclbuf[xab.xab$w_acllen / 4];
+ while (*aclptr && aclptr < aclend)
+ {
+ size = (*aclptr & 0xff) / 4;
+ typecode = (*aclptr >> 8) & 0xff;
+ if (typecode == ACE$C_KEYID)
+ for (i = size - 1; i > 1; i--)
+ if (aclptr[i] == uic)
+ {
+ acl_controlled = 1;
+ if (aclptr[1] & ACE$M_WRITE)
+ return 0; /* Write access through ACL */
+ }
+ aclptr = &aclptr[size];
+ }
+ if (acl_controlled) /* ACL specified, prohibits write access */
+ return -1;
+ }
+ /* No ACL entries specified, check normal protection */
+ if (WRITEABLE (XAB$V_WLD)) /* World writeable */
+ return 0;
+ if (WRITEABLE (XAB$V_GRP) &&
+ (unsigned short) (xab.xab$l_uic >> 16) == grpid)
+ return 0; /* Group writeable */
+ if (WRITEABLE (XAB$V_OWN) &&
+ (xab.xab$l_uic & 0xFFFF) == memid)
+ return 0; /* Owner writeable */
+
+ return -1; /* Not writeable */
+}
+#endif /* not VMS4_4 */
+#endif /* access */
+
+static char vtbuf[NAM$C_MAXRSS+1];
+
+/* translate a vms file spec to a unix path */
+char *
+sys_translate_vms (vfile)
+ char * vfile;
+{
+ char * p;
+ char * targ;
+
+ if (!vfile)
+ return 0;
+
+ targ = vtbuf;
+
+ /* leading device or logical name is a root directory */
+ if (p = strchr (vfile, ':'))
+ {
+ *targ++ = '/';
+ while (vfile < p)
+ *targ++ = *vfile++;
+ vfile++;
+ *targ++ = '/';
+ }
+ p = vfile;
+ if (*p == '[' || *p == '<')
+ {
+ while (*++vfile != *p + 2)
+ switch (*vfile)
+ {
+ case '.':
+ if (vfile[-1] == *p)
+ *targ++ = '.';
+ *targ++ = '/';
+ break;
+
+ case '-':
+ *targ++ = '.';
+ *targ++ = '.';
+ break;
+
+ default:
+ *targ++ = *vfile;
+ break;
+ }
+ vfile++;
+ *targ++ = '/';
+ }
+ while (*vfile)
+ *targ++ = *vfile++;
+
+ return vtbuf;
+}
+
+static char utbuf[NAM$C_MAXRSS+1];
+
+/* translate a unix path to a VMS file spec */
+char *
+sys_translate_unix (ufile)
+ char * ufile;
+{
+ int slash_seen = 0;
+ char *p;
+ char * targ;
+
+ if (!ufile)
+ return 0;
+
+ targ = utbuf;
+
+ if (*ufile == '/')
+ {
+ ufile++;
+ }
+
+ while (*ufile)
+ {
+ switch (*ufile)
+ {
+ case '/':
+ if (slash_seen)
+ if (index (&ufile[1], '/'))
+ *targ++ = '.';
+ else
+ *targ++ = ']';
+ else
+ {
+ *targ++ = ':';
+ if (index (&ufile[1], '/'))
+ *targ++ = '[';
+ slash_seen = 1;
+ }
+ break;
+
+ case '.':
+ if (strncmp (ufile, "./", 2) == 0)
+ {
+ if (!slash_seen)
+ {
+ *targ++ = '[';
+ slash_seen = 1;
+ }
+ ufile++; /* skip the dot */
+ if (index (&ufile[1], '/'))
+ *targ++ = '.';
+ else
+ *targ++ = ']';
+ }
+ else if (strncmp (ufile, "../", 3) == 0)
+ {
+ if (!slash_seen)
+ {
+ *targ++ = '[';
+ slash_seen = 1;
+ }
+ *targ++ = '-';
+ ufile += 2; /* skip the dots */
+ if (index (&ufile[1], '/'))
+ *targ++ = '.';
+ else
+ *targ++ = ']';
+ }
+ else
+ *targ++ = *ufile;
+ break;
+
+ default:
+ *targ++ = *ufile;
+ break;
+ }
+ ufile++;
+ }
+ *targ = '\0';
+
+ return utbuf;
+}
+
+char *
+getwd (pathname)
+ char *pathname;
+{
+ char *ptr;
+ strcpy (pathname, egetenv ("PATH"));
+
+ ptr = pathname;
+ while (*ptr)
+ {
+ if ('a' <= *ptr && *ptr <= 'z')
+ *ptr -= 040;
+ ptr++;
+ }
+ return pathname;
+}
+
+getppid ()
+{
+ long item_code = JPI$_OWNER;
+ unsigned long parent_id;
+ int status;
+
+ if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return -1;
+ }
+ return parent_id;
+}
+
+#undef getuid
+unsigned
+sys_getuid ()
+{
+ return (getgid () << 16) | getuid ();
+}
+
+int
+sys_read (fildes, buf, nbyte)
+ int fildes;
+ char *buf;
+ unsigned int nbyte;
+{
+ return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
+}
+
+#if 0
+int
+sys_write (fildes, buf, nbyte)
+ int fildes;
+ char *buf;
+ unsigned int nbyte;
+{
+ register int nwrote, rtnval = 0;
+
+ while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
+ nbyte -= nwrote;
+ buf += nwrote;
+ rtnval += nwrote;
+ }
+ if (nwrote < 0)
+ return rtnval ? rtnval : -1;
+ if ((nwrote = write (fildes, buf, nbyte)) < 0)
+ return rtnval ? rtnval : -1;
+ return (rtnval + nwrote);
+}
+#endif /* 0 */
+
+/*
+ * VAX/VMS VAX C RTL really loses. It insists that records
+ * end with a newline (carriage return) character, and if they
+ * don't it adds one (nice of it isn't it!)
+ *
+ * Thus we do this stupidity below.
+ */
+
+int
+sys_write (fildes, buf, nbytes)
+ int fildes;
+ char *buf;
+ unsigned int nbytes;
+{
+ register char *p;
+ register char *e;
+ int retval, sum;
+ p = buf;
+ sum = 0;
+ while (nbytes > 0)
+ {
+ e = p + min (MAXIOSIZE, nbytes) - 1;
+ while (*e != '\n' && e > p) e--;
+ if (p == e) /* Ok.. so here we add a newline... sigh. */
+ e = p + min (MAXIOSIZE, nbytes) - 1;
+ retval = write (fildes, p, e - p + 1);
+ if (retval != e - p + 1) return -1;
+ p = e + 1;
+ sum = sum + retval;
+ nbytes -= retval;
+ }
+ return sum;
+}
+
+/* Create file NEW copying its attributes from file OLD. If
+ OLD is 0 or does not exist, create based on the value of
+ vms_stmlf_recfm. */
+
+/* Protection value the file should ultimately have.
+ Set by create_copy_attrs, and use by rename_sansversions. */
+static unsigned short int fab_final_pro;
+
+int
+creat_copy_attrs (old, new)
+ char *old, *new;
+{
+ struct FAB fab = cc$rms_fab;
+ struct XABPRO xabpro;
+ char aclbuf[256]; /* Choice of size is arbitrary. See below. */
+ extern int vms_stmlf_recfm;
+
+ if (old)
+ {
+ fab.fab$b_fac = FAB$M_GET;
+ fab.fab$l_fna = old;
+ fab.fab$b_fns = strlen (old);
+ fab.fab$l_xab = (char *) &xabpro;
+ xabpro = cc$rms_xabpro;
+ xabpro.xab$l_aclbuf = aclbuf;
+ xabpro.xab$w_aclsiz = sizeof aclbuf;
+ /* Call $OPEN to fill in the fab & xabpro fields. */
+ if (sys$open (&fab, 0, 0) & 1)
+ {
+ sys$close (&fab, 0, 0);
+ fab.fab$l_alq = 0; /* zero the allocation quantity */
+ if (xabpro.xab$w_acllen > 0)
+ {
+ if (xabpro.xab$w_acllen > sizeof aclbuf)
+ /* If the acl buffer was too short, redo open with longer one.
+ Wouldn't need to do this if there were some system imposed
+ limit on the size of an ACL, but I can't find any such. */
+ {
+ xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
+ xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
+ if (sys$open (&fab, 0, 0) & 1)
+ sys$close (&fab, 0, 0);
+ else
+ old = 0;
+ }
+ }
+ else
+ xabpro.xab$l_aclbuf = 0;
+ }
+ else
+ old = 0;
+ }
+ fab.fab$l_fna = new;
+ fab.fab$b_fns = strlen (new);
+ if (!old)
+ {
+ fab.fab$l_xab = 0;
+ fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
+ fab.fab$b_rat = FAB$M_CR;
+ }
+
+ /* Set the file protections such that we will be able to manipulate
+ this file. Once we are done writing and renaming it, we will set
+ the protections back. */
+ if (old)
+ fab_final_pro = xabpro.xab$w_pro;
+ else
+ sys$setdfprot (0, &fab_final_pro);
+ xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
+
+ /* Create the new file with either default attrs or attrs copied
+ from old file. */
+ if (!(SYS$CREATE (&fab, 0, 0) & 1))
+ return -1;
+ sys$close (&fab, 0, 0);
+ /* As this is a "replacement" for creat, return a file descriptor
+ opened for writing. */
+ return open (new, O_WRONLY);
+}
+
+#ifdef creat
+#undef creat
+#include <varargs.h>
+#ifdef __GNUC__
+#ifndef va_count
+#define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
+#endif
+#endif
+
+sys_creat (va_alist)
+ va_dcl
+{
+ va_list list_incrementor;
+ char *name;
+ int mode;
+ int rfd; /* related file descriptor */
+ int fd; /* Our new file descriptor */
+ int count;
+ struct stat st_buf;
+ char rfm[12];
+ char rat[15];
+ char mrs[13];
+ char fsz[13];
+ extern int vms_stmlf_recfm;
+
+ va_count (count);
+ va_start (list_incrementor);
+ name = va_arg (list_incrementor, char *);
+ mode = va_arg (list_incrementor, int);
+ if (count > 2)
+ rfd = va_arg (list_incrementor, int);
+ va_end (list_incrementor);
+ if (count > 2)
+ {
+ /* Use information from the related file descriptor to set record
+ format of the newly created file. */
+ fstat (rfd, &st_buf);
+ switch (st_buf.st_fab_rfm)
+ {
+ case FAB$C_FIX:
+ strcpy (rfm, "rfm = fix");
+ sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
+ strcpy (rat, "rat = ");
+ if (st_buf.st_fab_rat & FAB$M_CR)
+ strcat (rat, "cr");
+ else if (st_buf.st_fab_rat & FAB$M_FTN)
+ strcat (rat, "ftn");
+ else if (st_buf.st_fab_rat & FAB$M_PRN)
+ strcat (rat, "prn");
+ if (st_buf.st_fab_rat & FAB$M_BLK)
+ if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
+ strcat (rat, ", blk");
+ else
+ strcat (rat, "blk");
+ return creat (name, 0, rfm, rat, mrs);
+
+ case FAB$C_VFC:
+ strcpy (rfm, "rfm = vfc");
+ sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
+ strcpy (rat, "rat = ");
+ if (st_buf.st_fab_rat & FAB$M_CR)
+ strcat (rat, "cr");
+ else if (st_buf.st_fab_rat & FAB$M_FTN)
+ strcat (rat, "ftn");
+ else if (st_buf.st_fab_rat & FAB$M_PRN)
+ strcat (rat, "prn");
+ if (st_buf.st_fab_rat & FAB$M_BLK)
+ if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
+ strcat (rat, ", blk");
+ else
+ strcat (rat, "blk");
+ return creat (name, 0, rfm, rat, fsz);
+
+ case FAB$C_STM:
+ strcpy (rfm, "rfm = stm");
+ break;
+
+ case FAB$C_STMCR:
+ strcpy (rfm, "rfm = stmcr");
+ break;
+
+ case FAB$C_STMLF:
+ strcpy (rfm, "rfm = stmlf");
+ break;
+
+ case FAB$C_UDF:
+ strcpy (rfm, "rfm = udf");
+ break;
+
+ case FAB$C_VAR:
+ strcpy (rfm, "rfm = var");
+ break;
+ }
+ strcpy (rat, "rat = ");
+ if (st_buf.st_fab_rat & FAB$M_CR)
+ strcat (rat, "cr");
+ else if (st_buf.st_fab_rat & FAB$M_FTN)
+ strcat (rat, "ftn");
+ else if (st_buf.st_fab_rat & FAB$M_PRN)
+ strcat (rat, "prn");
+ if (st_buf.st_fab_rat & FAB$M_BLK)
+ if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
+ strcat (rat, ", blk");
+ else
+ strcat (rat, "blk");
+ }
+ else
+ {
+ strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
+ strcpy (rat, "rat=cr");
+ }
+ /* Until the VAX C RTL fixes the many bugs with modes, always use
+ mode 0 to get the user's default protection. */
+ fd = creat (name, 0, rfm, rat);
+ if (fd < 0 && errno == EEXIST)
+ {
+ if (unlink (name) < 0)
+ report_file_error ("delete", build_string (name));
+ fd = creat (name, 0, rfm, rat);
+ }
+ return fd;
+}
+#endif /* creat */
+
+/* fwrite to stdout is S L O W. Speed it up by using fputc...*/
+sys_fwrite (ptr, size, num, fp)
+ register char * ptr;
+ FILE * fp;
+{
+ register int tot = num * size;
+
+ while (tot--)
+ fputc (*ptr++, fp);
+}
+
+/*
+ * The VMS C library routine creat actually creates a new version of an
+ * existing file rather than truncating the old version. There are times
+ * when this is not the desired behavior, for instance, when writing an
+ * auto save file (you only want one version), or when you don't have
+ * write permission in the directory containing the file (but the file
+ * itself is writable). Hence this routine, which is equivalent to
+ * "close (creat (fn, 0));" on Unix if fn already exists.
+ */
+int
+vms_truncate (fn)
+ char *fn;
+{
+ struct FAB xfab = cc$rms_fab;
+ struct RAB xrab = cc$rms_rab;
+ int status;
+
+ xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
+ xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
+ xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
+ xfab.fab$l_fna = fn;
+ xfab.fab$b_fns = strlen (fn);
+ xfab.fab$l_dna = ";0"; /* default to latest version of the file */
+ xfab.fab$b_dns = 2;
+ xrab.rab$l_fab = &xfab;
+
+ /* This gibberish opens the file, positions to the first record, and
+ deletes all records from there until the end of file. */
+ if ((sys$open (&xfab) & 01) == 01)
+ {
+ if ((sys$connect (&xrab) & 01) == 01 &&
+ (sys$find (&xrab) & 01) == 01 &&
+ (sys$truncate (&xrab) & 01) == 01)
+ status = 0;
+ else
+ status = -1;
+ }
+ else
+ status = -1;
+ sys$close (&xfab);
+ return status;
+}
+
+/* Define this symbol to actually read SYSUAF.DAT. This requires either
+ SYSPRV or a readable SYSUAF.DAT. */
+
+#ifdef READ_SYSUAF
+/*
+ * getuaf.c
+ *
+ * Routine to read the VMS User Authorization File and return
+ * a specific user's record.
+ */
+
+static struct UAF retuaf;
+
+struct UAF *
+get_uaf_name (uname)
+ char * uname;
+{
+ register status;
+ struct FAB uaf_fab;
+ struct RAB uaf_rab;
+
+ uaf_fab = cc$rms_fab;
+ uaf_rab = cc$rms_rab;
+ /* initialize fab fields */
+ uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
+ uaf_fab.fab$b_fns = 21;
+ uaf_fab.fab$b_fac = FAB$M_GET;
+ uaf_fab.fab$b_org = FAB$C_IDX;
+ uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
+ /* initialize rab fields */
+ uaf_rab.rab$l_fab = &uaf_fab;
+ /* open the User Authorization File */
+ status = sys$open (&uaf_fab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ status = sys$connect (&uaf_rab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ /* read the requested record - index is in uname */
+ uaf_rab.rab$l_kbf = uname;
+ uaf_rab.rab$b_ksz = strlen (uname);
+ uaf_rab.rab$b_rac = RAB$C_KEY;
+ uaf_rab.rab$l_ubf = (char *)&retuaf;
+ uaf_rab.rab$w_usz = sizeof retuaf;
+ status = sys$get (&uaf_rab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ /* close the User Authorization File */
+ status = sys$disconnect (&uaf_rab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ status = sys$close (&uaf_fab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ return &retuaf;
+}
+
+struct UAF *
+get_uaf_uic (uic)
+ unsigned long uic;
+{
+ register status;
+ struct FAB uaf_fab;
+ struct RAB uaf_rab;
+
+ uaf_fab = cc$rms_fab;
+ uaf_rab = cc$rms_rab;
+ /* initialize fab fields */
+ uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
+ uaf_fab.fab$b_fns = 21;
+ uaf_fab.fab$b_fac = FAB$M_GET;
+ uaf_fab.fab$b_org = FAB$C_IDX;
+ uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
+ /* initialize rab fields */
+ uaf_rab.rab$l_fab = &uaf_fab;
+ /* open the User Authorization File */
+ status = sys$open (&uaf_fab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ status = sys$connect (&uaf_rab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ /* read the requested record - index is in uic */
+ uaf_rab.rab$b_krf = 1; /* 1st alternate key */
+ uaf_rab.rab$l_kbf = (char *) &uic;
+ uaf_rab.rab$b_ksz = sizeof uic;
+ uaf_rab.rab$b_rac = RAB$C_KEY;
+ uaf_rab.rab$l_ubf = (char *)&retuaf;
+ uaf_rab.rab$w_usz = sizeof retuaf;
+ status = sys$get (&uaf_rab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ /* close the User Authorization File */
+ status = sys$disconnect (&uaf_rab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ status = sys$close (&uaf_fab);
+ if (!(status&1))
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return 0;
+ }
+ return &retuaf;
+}
+
+static struct passwd retpw;
+
+struct passwd *
+cnv_uaf_pw (up)
+ struct UAF * up;
+{
+ char * ptr;
+
+ /* copy these out first because if the username is 32 chars, the next
+ section will overwrite the first byte of the UIC */
+ retpw.pw_uid = up->uaf$w_mem;
+ retpw.pw_gid = up->uaf$w_grp;
+
+ /* I suppose this is not the best sytle, to possibly overwrite one
+ byte beyond the end of the field, but what the heck... */
+ ptr = &up->uaf$t_username[UAF$S_USERNAME];
+ while (ptr[-1] == ' ')
+ ptr--;
+ *ptr = '\0';
+ strcpy (retpw.pw_name, up->uaf$t_username);
+
+ /* the rest of these are counted ascii strings */
+ strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
+ retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
+ strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
+ retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
+ strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
+ retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
+ strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
+ retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
+
+ return &retpw;
+}
+#else /* not READ_SYSUAF */
+static struct passwd retpw;
+#endif /* not READ_SYSUAF */
+
+struct passwd *
+getpwnam (name)
+ char * name;
+{
+#ifdef READ_SYSUAF
+ struct UAF *up;
+#else
+ char * user;
+ char * dir;
+ unsigned char * full;
+#endif /* READ_SYSUAF */
+ char *ptr = name;
+
+ while (*ptr)
+ {
+ if ('a' <= *ptr && *ptr <= 'z')
+ *ptr -= 040;
+ ptr++;
+ }
+#ifdef READ_SYSUAF
+ if (!(up = get_uaf_name (name)))
+ return 0;
+ return cnv_uaf_pw (up);
+#else
+ if (strcmp (name, getenv ("USER")) == 0)
+ {
+ retpw.pw_uid = getuid ();
+ retpw.pw_gid = getgid ();
+ strcpy (retpw.pw_name, name);
+ if (full = egetenv ("FULLNAME"))
+ strcpy (retpw.pw_gecos, full);
+ else
+ *retpw.pw_gecos = '\0';
+ strcpy (retpw.pw_dir, egetenv ("HOME"));
+ *retpw.pw_shell = '\0';
+ return &retpw;
+ }
+ else
+ return 0;
+#endif /* not READ_SYSUAF */
+}
+
+struct passwd *
+getpwuid (uid)
+ unsigned long uid;
+{
+#ifdef READ_SYSUAF
+ struct UAF * up;
+
+ if (!(up = get_uaf_uic (uid)))
+ return 0;
+ return cnv_uaf_pw (up);
+#else
+ if (uid == sys_getuid ())
+ return getpwnam (egetenv ("USER"));
+ else
+ return 0;
+#endif /* not READ_SYSUAF */
+}
+
+/* return total address space available to the current process. This is
+ the sum of the current p0 size, p1 size and free page table entries
+ available. */
+vlimit ()
+{
+ int item_code;
+ unsigned long free_pages;
+ unsigned long frep0va;
+ unsigned long frep1va;
+ register status;
+
+ item_code = JPI$_FREPTECNT;
+ if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return -1;
+ }
+ free_pages *= 512;
+
+ item_code = JPI$_FREP0VA;
+ if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return -1;
+ }
+ item_code = JPI$_FREP1VA;
+ if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return -1;
+ }
+
+ return free_pages + frep0va + (0x7fffffff - frep1va);
+}
+
+define_logical_name (varname, string)
+ char *varname;
+ char *string;
+{
+ struct dsc$descriptor_s strdsc =
+ {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
+ struct dsc$descriptor_s envdsc =
+ {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
+ struct dsc$descriptor_s lnmdsc =
+ {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
+
+ return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
+}
+
+delete_logical_name (varname)
+ char *varname;
+{
+ struct dsc$descriptor_s envdsc =
+ {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
+ struct dsc$descriptor_s lnmdsc =
+ {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
+
+ return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
+}
+
+ulimit ()
+{}
+
+setpriority ()
+{}
+
+setpgrp ()
+{}
+
+execvp ()
+{
+ error ("execvp system call not implemented");
+}
+
+int
+rename (from, to)
+ char *from, *to;
+{
+ int status;
+ struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
+ struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
+ char from_esn[NAM$C_MAXRSS];
+ char to_esn[NAM$C_MAXRSS];
+
+ from_fab.fab$l_fna = from;
+ from_fab.fab$b_fns = strlen (from);
+ from_fab.fab$l_nam = &from_nam;
+ from_fab.fab$l_fop = FAB$M_NAM;
+
+ from_nam.nam$l_esa = from_esn;
+ from_nam.nam$b_ess = sizeof from_esn;
+
+ to_fab.fab$l_fna = to;
+ to_fab.fab$b_fns = strlen (to);
+ to_fab.fab$l_nam = &to_nam;
+ to_fab.fab$l_fop = FAB$M_NAM;
+
+ to_nam.nam$l_esa = to_esn;
+ to_nam.nam$b_ess = sizeof to_esn;
+
+ status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
+
+ if (status & 1)
+ return 0;
+ else
+ {
+ if (status == RMS$_DEV)
+ errno = EXDEV;
+ else
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return -1;
+ }
+}
+
+/* This function renames a file like `rename', but it strips
+ the version number from the "to" filename, such that the "to" file is
+ will always be a new version. It also sets the file protection once it is
+ finished. The protection that we will use is stored in fab_final_pro,
+ and was set when we did a creat_copy_attrs to create the file that we
+ are renaming.
+
+ We could use the chmod function, but Eunichs uses 3 bits per user category
+ to describe the protection, and VMS uses 4 (write and delete are seperate
+ bits). To maintain portability, the VMS implementation of `chmod' wires
+ the W and D bits together. */
+
+
+static struct fibdef fib; /* We need this initialized to zero */
+char vms_file_written[NAM$C_MAXRSS];
+
+int
+rename_sans_version (from,to)
+ char *from, *to;
+{
+ short int chan;
+ int stat;
+ short int iosb[4];
+ int status;
+ struct FAB to_fab = cc$rms_fab;
+ struct NAM to_nam = cc$rms_nam;
+ struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
+ struct dsc$descriptor fib_attr[2]
+ = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
+ char to_esn[NAM$C_MAXRSS];
+
+ $DESCRIPTOR (disk,to_esn);
+
+ to_fab.fab$l_fna = to;
+ to_fab.fab$b_fns = strlen (to);
+ to_fab.fab$l_nam = &to_nam;
+ to_fab.fab$l_fop = FAB$M_NAM;
+
+ to_nam.nam$l_esa = to_esn;
+ to_nam.nam$b_ess = sizeof to_esn;
+
+ status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
+
+ if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
+ *(to_nam.nam$l_ver) = '\0';
+
+ stat = rename (from, to_esn);
+ if (stat < 0)
+ return stat;
+
+ strcpy (vms_file_written, to_esn);
+
+ to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
+ to_fab.fab$b_fns = strlen (vms_file_written);
+
+ /* Now set the file protection to the correct value */
+ sys$open (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
+
+ /* Copy these fields into the fib */
+ fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
+ fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
+ fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
+
+ sys$close (&to_fab, 0, 0);
+
+ stat = sys$assign (&disk, &chan, 0, 0); /* open a channel to the disk */
+ if (!stat)
+ lib$signal (stat);
+ stat = sys$qiow (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
+ 0, 0, 0, &fib_attr, 0);
+ if (!stat)
+ lib$signal (stat);
+ stat = sys$dassgn (chan);
+ if (!stat)
+ lib$signal (stat);
+ strcpy (vms_file_written, to_esn); /* We will write this to the screen*/
+ return 0;
+}
+
+link (file, new)
+ char * file, * new;
+{
+ register status;
+ struct FAB fab;
+ struct NAM nam;
+ unsigned short fid[3];
+ char esa[NAM$C_MAXRSS];
+
+ fab = cc$rms_fab;
+ fab.fab$l_fop = FAB$M_OFP;
+ fab.fab$l_fna = file;
+ fab.fab$b_fns = strlen (file);
+ fab.fab$l_nam = &nam;
+
+ nam = cc$rms_nam;
+ nam.nam$l_esa = esa;
+ nam.nam$b_ess = NAM$C_MAXRSS;
+
+ status = SYS$PARSE (&fab);
+ if ((status & 1) == 0)
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return -1;
+ }
+ status = SYS$SEARCH (&fab);
+ if ((status & 1) == 0)
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return -1;
+ }
+
+ fid[0] = nam.nam$w_fid[0];
+ fid[1] = nam.nam$w_fid[1];
+ fid[2] = nam.nam$w_fid[2];
+
+ fab.fab$l_fna = new;
+ fab.fab$b_fns = strlen (new);
+
+ status = SYS$PARSE (&fab);
+ if ((status & 1) == 0)
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return -1;
+ }
+
+ nam.nam$w_fid[0] = fid[0];
+ nam.nam$w_fid[1] = fid[1];
+ nam.nam$w_fid[2] = fid[2];
+
+ nam.nam$l_esa = nam.nam$l_name;
+ nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
+
+ status = SYS$ENTER (&fab);
+ if ((status & 1) == 0)
+ {
+ errno = EVMSERR;
+ vaxc$errno = status;
+ return -1;
+ }
+
+ return 0;
+}
+
+croak (badfunc)
+ char *badfunc;
+{
+ printf ("%s not yet implemented\r\n", badfunc);
+ reset_sys_modes ();
+ exit (1);
+}
+
+long
+random ()
+{
+ /* Arrange to return a range centered on zero. */
+ return rand () - (1 << 30);
+}
+
+srandom (seed)
+{
+ srand (seed);
+}
+#endif /* VMS */
+\f
+#ifdef AIX
+
+/* Called from init_sys_modes. */
+hft_init ()
+{
+ int junk;
+
+ /* If we're not on an HFT we shouldn't do any of this. We determine
+ if we are on an HFT by trying to get an HFT error code. If this
+ call fails, we're not on an HFT. */
+#ifdef IBMR2AIX
+ if (ioctl (0, HFQERROR, &junk) < 0)
+ return;
+#else /* not IBMR2AIX */
+ if (ioctl (0, HFQEIO, 0) < 0)
+ return;
+#endif /* not IBMR2AIX */
+
+ /* On AIX the default hft keyboard mapping uses backspace rather than delete
+ as the rubout key's ASCII code. Here this is changed. The bug is that
+ there's no way to determine the old mapping, so in reset_sys_modes
+ we need to assume that the normal map had been present. Of course, this
+ code also doesn't help if on a terminal emulator which doesn't understand
+ HFT VTD's. */
+ {
+ struct hfbuf buf;
+ struct hfkeymap keymap;
+
+ buf.hf_bufp = (char *)&keymap;
+ buf.hf_buflen = sizeof (keymap);
+ keymap.hf_nkeys = 2;
+ keymap.hfkey[0].hf_kpos = 15;
+ keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
+#ifdef IBMR2AIX
+ keymap.hfkey[0].hf_keyidh = '<';
+#else /* not IBMR2AIX */
+ keymap.hfkey[0].hf_page = '<';
+#endif /* not IBMR2AIX */
+ keymap.hfkey[0].hf_char = 127;
+ keymap.hfkey[1].hf_kpos = 15;
+ keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
+#ifdef IBMR2AIX
+ keymap.hfkey[1].hf_keyidh = '<';
+#else /* not IBMR2AIX */
+ keymap.hfkey[1].hf_page = '<';
+#endif /* not IBMR2AIX */
+ keymap.hfkey[1].hf_char = 127;
+ hftctl (0, HFSKBD, &buf);
+ }
+ /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
+ at times. */
+ line_ins_del_ok = char_ins_del_ok = 0;
+}
+
+/* Reset the rubout key to backspace. */
+
+hft_reset ()
+{
+ struct hfbuf buf;
+ struct hfkeymap keymap;
+ int junk;
+
+#ifdef IBMR2AIX
+ if (ioctl (0, HFQERROR, &junk) < 0)
+ return;
+#else /* not IBMR2AIX */
+ if (ioctl (0, HFQEIO, 0) < 0)
+ return;
+#endif /* not IBMR2AIX */
+
+ buf.hf_bufp = (char *)&keymap;
+ buf.hf_buflen = sizeof (keymap);
+ keymap.hf_nkeys = 2;
+ keymap.hfkey[0].hf_kpos = 15;
+ keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
+#ifdef IBMR2AIX
+ keymap.hfkey[0].hf_keyidh = '<';
+#else /* not IBMR2AIX */
+ keymap.hfkey[0].hf_page = '<';
+#endif /* not IBMR2AIX */
+ keymap.hfkey[0].hf_char = 8;
+ keymap.hfkey[1].hf_kpos = 15;
+ keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
+#ifdef IBMR2AIX
+ keymap.hfkey[1].hf_keyidh = '<';
+#else /* not IBMR2AIX */
+ keymap.hfkey[1].hf_page = '<';
+#endif /* not IBMR2AIX */
+ keymap.hfkey[1].hf_char = 8;
+ hftctl (0, HFSKBD, &buf);
+}
+
+#endif /* AIX */
HCoop / bpt / emacs.git / commitdiff