/* Interfaces to system-dependent kernel and library entries.
- Copyright (C) 1985, 86,87,88,93,94,95,1999,2000,01,2003
- Free Software Foundation, Inc.
+ Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001,
+ 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GNU Emacs.
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, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "blockinput.h"
-#undef NULL
#ifdef MAC_OS8
-/* It is essential to include stdlib.h so that this file picks up
- the correct definitions of rand, srand, and RAND_MAX.
- Otherwise random numbers will not work correctly. */
-#include <stdlib.h>
+#include <sys/param.h>
#ifndef subprocesses
/* Nonzero means delete a process right away if it exits (process.c). */
#endif
#endif /* not WINDOWSNT */
-#ifdef HAVE_CARBON
-#define read sys_read
-#endif
-
/* Does anyone other than VMS need this? */
#ifndef fwrite
#define sys_fwrite fwrite
#define _P_WAIT 0
int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
int _CRTAPI1 _getpid (void);
+extern char *getwd (char *);
#endif
#ifdef NONSYSTEM_DIR_LIBRARY
SIGMASKTYPE sigprocmask_set;
+
+#ifndef HAVE_GET_CURRENT_DIR_NAME
+
+/* Return the current working directory. Returns NULL on errors.
+ Any other returned value must be freed with free. This is used
+ only when get_current_dir_name is not defined on the system. */
+char*
+get_current_dir_name ()
+{
+ char *buf;
+ char *pwd;
+ struct stat dotstat, pwdstat;
+ /* If PWD is accurate, use it instead of calling getwd. PWD is
+ sometimes a nicer name, and using it may avoid a fatal error if a
+ parent directory is searchable but not readable. */
+ if ((pwd = getenv ("PWD")) != 0
+ && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
+ && stat (pwd, &pwdstat) == 0
+ && stat (".", &dotstat) == 0
+ && dotstat.st_ino == pwdstat.st_ino
+ && dotstat.st_dev == pwdstat.st_dev
+#ifdef MAXPATHLEN
+ && strlen (pwd) < MAXPATHLEN
+#endif
+ )
+ {
+ buf = (char *) malloc (strlen (pwd) + 1);
+ if (!buf)
+ return NULL;
+ strcpy (buf, pwd);
+ }
+#ifdef HAVE_GETCWD
+ else
+ {
+ size_t buf_size = 1024;
+ buf = (char *) malloc (buf_size);
+ if (!buf)
+ return NULL;
+ for (;;)
+ {
+ if (getcwd (buf, buf_size) == buf)
+ break;
+ if (errno != ERANGE)
+ {
+ int tmp_errno = errno;
+ free (buf);
+ errno = tmp_errno;
+ return NULL;
+ }
+ buf_size *= 2;
+ buf = (char *) realloc (buf, buf_size);
+ if (!buf)
+ return NULL;
+ }
+ }
+#else
+ else
+ {
+ /* We need MAXPATHLEN here. */
+ buf = (char *) malloc (MAXPATHLEN + 1);
+ if (!buf)
+ return NULL;
+ if (getwd (buf) == NULL)
+ {
+ int tmp_errno = errno;
+ free (buf);
+ errno = tmp_errno;
+ return NULL;
+ }
+ }
+#endif
+ return buf;
+}
+#endif
+
\f
/* Specify a different file descriptor for further input operations. */
s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
#endif /* HPUX */
+#ifdef SIGNALS_VIA_CHARACTERS
+ /* the QUIT and INTR character are used in process_send_signal
+ so set them here to something useful. */
+ if (s.main.c_cc[VQUIT] == CDISABLE)
+ s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
+ if (s.main.c_cc[VINTR] == CDISABLE)
+ s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
+#endif /* not SIGNALS_VIA_CHARACTERS */
+
#ifdef AIX
/* AIX enhanced edit loses NULs, so disable it */
#ifndef IBMR2AIX
don't ignore break, but don't signal either, so it looks like NUL. */
s.main.c_iflag &= ~IGNBRK;
s.main.c_iflag &= ~BRKINT;
+ /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
+ unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
+ would force it to 0377. That looks like duplicated code. */
+#ifndef SIGNALS_VIA_CHARACTERS
/* QUIT and INTR work better as signals, so disable character forms */
- s.main.c_cc[VINTR] = 0377;
-#ifdef SIGNALS_VIA_CHARACTERS
- /* the QUIT and INTR character are used in process_send_signal
- so set them here to something useful. */
- if (s.main.c_cc[VQUIT] == 0377)
- s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
- if (s.main.c_cc[VINTR] == 0377)
- s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
-#else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
- /* QUIT and INTR work better as signals, so disable character forms */
- s.main.c_cc[VQUIT] = 0377;
- s.main.c_cc[VINTR] = 0377;
+ s.main.c_cc[VQUIT] = CDISABLE;
+ s.main.c_cc[VINTR] = CDISABLE;
s.main.c_lflag &= ~ISIG;
#endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
- s.main.c_cc[VEOL] = 0377;
+ s.main.c_cc[VEOL] = CDISABLE;
s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
#endif /* AIX */
if (pid == -1)
write (1, "Can't execute subshell", 22);
#else /* not WINDOWSNT */
- execlp (sh, sh, 0);
+ execlp (sh, sh, (char *) 0);
write (1, "Can't execute subshell", 22);
_exit (1);
#endif /* not WINDOWSNT */
tty.main.c_line = 0;
tty.main.c_iflag &= ~ASCEDIT;
#else
- tty.main.c_cc[VSTRT] = 255;
- tty.main.c_cc[VSTOP] = 255;
- tty.main.c_cc[VSUSP] = 255;
- tty.main.c_cc[VDSUSP] = 255;
+ tty.main.c_cc[VSTRT] = CDISABLE;
+ tty.main.c_cc[VSTOP] = CDISABLE;
+ tty.main.c_cc[VSUSP] = CDISABLE;
+ tty.main.c_cc[VDSUSP] = CDISABLE;
#endif /* IBMR2AIX */
if (flow_control)
{
#else
#ifdef VMS
+ /* Use a fresh channel since the current one may have stale info
+ (for example, from prior to a suspend); and to avoid a dependency
+ in the init sequence. */
+ int chan;
struct sensemode tty;
- SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
- &tty.class, 12, 0, 0, 0, 0);
+ SYS$ASSIGN (&input_dsc, &chan, 0, 0);
+ SYS$QIOW (0, chan, IO$_SENSEMODE, &tty, 0, 0,
+ &tty.class, 12, 0, 0, 0, 0);
+ SYS$DASSGN (chan);
*widthp = tty.scr_wid;
*heightp = tty.scr_len;
#else /* not BSD4_1 */
signal (SIGALRM, SIG_IGN);
#endif /* not BSD4_1 */
+ SIGNAL_THREAD_CHECK (SIGALRM);
if (read_alarm_should_throw)
longjmp (read_alarm_throw, 1);
}
/* Read keyboard input into the standard buffer,
waiting for at least one character. */
-/* Make all keyboard buffers much bigger when using a window system. */
-#ifdef HAVE_WINDOW_SYSTEM
-#define BUFFER_SIZE_FACTOR 16
-#else
-#define BUFFER_SIZE_FACTOR 1
-#endif
-
void
read_input_waiting ()
{
if (read_socket_hook)
{
- struct input_event buf[256];
- for (i = 0; i < 256; i++)
- EVENT_INIT (buf[i]);
-
+ struct input_event hold_quit;
+
+ EVENT_INIT (hold_quit);
+ hold_quit.kind = NO_EVENT;
+
read_alarm_should_throw = 0;
if (! setjmp (read_alarm_throw))
- nread = (*read_socket_hook) (0, buf, 256, 1);
+ nread = (*read_socket_hook) (0, 1, &hold_quit);
else
nread = -1;
- /* Scan the chars for C-g and store them in kbd_buffer. */
- for (i = 0; i < nread; i++)
- {
- kbd_buffer_store_event (&buf[i]);
- /* Don't look at input that follows a C-g too closely.
- This reduces lossage due to autorepeat on C-g. */
- if (buf[i].kind == ASCII_KEYSTROKE_EVENT
- && buf[i].code == quit_char)
- break;
- }
+ if (hold_quit.kind != NO_EVENT)
+ kbd_buffer_store_event (&hold_quit);
}
else
{
struct sigaction new_action, old_action;
sigemptyset (&new_action.sa_mask);
new_action.sa_handler = action;
-#if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART)
+#if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART) && !defined(SYNC_INPUT)
/* Emacs mostly works better with restartable system services. If this
flag exists, we probably want to turn it on here.
However, on some systems this resets the timeout of `select'
which means that `select' never finishes if it keeps getting signals.
BROKEN_SA_RESTART is defined on those systems. */
+ /* It's not clear why the comment above says "mostly works better". --Stef
+ When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
+ for pending input so we need long-running syscalls to be interrupted
+ after a signal that sets the interrupt_input_pending flag. */
new_action.sa_flags = SA_RESTART;
#else
new_action.sa_flags = 0;
#endif
while ((rtnval = open (path, oflag, mode)) == -1
- && (errno == EINTR));
+ && (errno == EINTR))
+ QUIT;
return (rtnval);
}
register int rtnval;
while ((rtnval = read (fildes, buf, nbyte)) == -1
- && (errno == EINTR));
+ && (errno == EINTR))
+ QUIT;
return (rtnval);
}
if (rtnval == -1)
{
if (errno == EINTR)
- continue;
+ {
+#ifdef SYNC_INPUT
+ /* I originally used `QUIT' but that might causes files to
+ be truncated if you hit C-g in the middle of it. --Stef */
+ if (interrupt_input_pending)
+ handle_async_input ();
+#endif
+ continue;
+ }
else
return (bytes_written ? bytes_written : -1);
}
\f
/* Functions for VMS */
#ifdef VMS
-#include "vms-pwd.h"
#include <acldef.h>
#include <chpdef.h>
#include <jpidef.h>
HCoop / bpt / emacs.git / blobdiff