1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
3 * This library is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU Lesser General Public
5 * License as published by the Free Software Foundation; either
6 * version 2.1 of the License, or (at your option) any later version.
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * Lesser General Public License for more details.
13 * You should have received a copy of the GNU Lesser General Public
14 * License along with this library; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 /* Make GNU/Linux libc declare everything it has. */
30 #include "libguile/_scm.h"
31 #include "libguile/dynwind.h"
32 #include "libguile/fports.h"
33 #include "libguile/scmsigs.h"
34 #include "libguile/feature.h"
35 #include "libguile/strings.h"
36 #include "libguile/srfi-13.h"
37 #include "libguile/vectors.h"
38 #include "libguile/lang.h"
40 #include "libguile/validate.h"
41 #include "libguile/posix.h"
42 #include "libguile/i18n.h"
43 #include "libguile/threads.h"
49 #ifdef TIME_WITH_SYS_TIME
50 # include <sys/time.h>
54 # include <sys/time.h>
64 extern char *ttyname();
68 #ifdef LIBC_H_WITH_UNISTD_H
72 #include <sys/types.h>
82 #ifdef HAVE_WINSOCK2_H
87 /* Some defines for Windows here. */
89 # define pipe(fd) _pipe (fd, 256, O_BINARY)
90 #endif /* __MINGW32__ */
93 # include <sys/wait.h>
96 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
99 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
104 extern char ** environ
;
109 #ifdef HAVE_SYS_UTSNAME_H
110 #include <sys/utsname.h>
113 #ifdef HAVE_SETLOCALE
122 #include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
125 #ifdef HAVE_SYS_PARAM_H
126 #include <sys/param.h> /* for MAXHOSTNAMELEN */
129 #if HAVE_SYS_RESOURCE_H
130 # include <sys/resource.h>
134 # include <sys/file.h>
137 #if HAVE_CRT_EXTERNS_H
138 #include <crt_externs.h> /* for Darwin _NSGetEnviron */
141 /* Some Unix systems don't define these. CPP hair is dangerous, but
142 this seems safe enough... */
159 /* On NextStep, <utime.h> doesn't define struct utime, unless we
160 #define _POSIX_SOURCE before #including it. I think this is less
161 of a kludge than defining struct utimbuf ourselves. */
162 #ifdef UTIMBUF_NEEDS_POSIX
163 #define _POSIX_SOURCE
166 #ifdef HAVE_SYS_UTIME_H
167 #include <sys/utime.h>
174 /* Please don't add any more #includes or #defines here. The hack
175 above means that _POSIX_SOURCE may be #defined, which will
176 encourage header files to do strange things.
178 FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
180 FIXME: Probably should do all the includes first, then all the fallback
181 declarations and defines, in case things are not in the header we
187 /* On Apple Darwin in a shared library there's no "environ" to access
188 directly, instead the address of that variable must be obtained with
190 #if HAVE__NSGETENVIRON && defined (PIC)
191 #define environ (*_NSGetEnviron())
196 /* Two often used patterns
199 #define WITH_STRING(str,cstr,code) \
201 char *cstr = scm_to_locale_string (str); \
206 #define STRING_SYSCALL(str,cstr,code) \
209 char *cstr = scm_to_locale_string (str); \
210 SCM_SYSCALL (code); \
211 eno = errno; free (cstr); errno = eno; \
216 SCM_SYMBOL (sym_read_pipe
, "read pipe");
217 SCM_SYMBOL (sym_write_pipe
, "write pipe");
219 SCM_DEFINE (scm_pipe
, "pipe", 0, 0, 0,
221 "Return a newly created pipe: a pair of ports which are linked\n"
222 "together on the local machine. The @emph{car} is the input\n"
223 "port and the @emph{cdr} is the output port. Data written (and\n"
224 "flushed) to the output port can be read from the input port.\n"
225 "Pipes are commonly used for communication with a newly forked\n"
226 "child process. The need to flush the output port can be\n"
227 "avoided by making it unbuffered using @code{setvbuf}.\n"
229 "Writes occur atomically provided the size of the data in bytes\n"
230 "is not greater than the value of @code{PIPE_BUF}. Note that\n"
231 "the output port is likely to block if too much data (typically\n"
232 "equal to @code{PIPE_BUF}) has been written but not yet read\n"
233 "from the input port.")
234 #define FUNC_NAME s_scm_pipe
243 p_rd
= scm_fdes_to_port (fd
[0], "r", sym_read_pipe
);
244 p_wt
= scm_fdes_to_port (fd
[1], "w", sym_write_pipe
);
245 return scm_cons (p_rd
, p_wt
);
250 #ifdef HAVE_GETGROUPS
251 SCM_DEFINE (scm_getgroups
, "getgroups", 0, 0, 0,
253 "Return a vector of integers representing the current\n"
254 "supplementary group IDs.")
255 #define FUNC_NAME s_scm_getgroups
262 ngroups
= getgroups (0, NULL
);
266 size
= ngroups
* sizeof (GETGROUPS_T
);
267 groups
= scm_malloc (size
);
268 getgroups (ngroups
, groups
);
270 result
= scm_c_make_vector (ngroups
, SCM_BOOL_F
);
271 while (--ngroups
>= 0)
272 SCM_SIMPLE_VECTOR_SET (result
, ngroups
, scm_from_ulong (groups
[ngroups
]));
280 #ifdef HAVE_SETGROUPS
281 SCM_DEFINE (scm_setgroups
, "setgroups", 1, 0, 0,
283 "Set the current set of supplementary group IDs to the integers\n"
284 "in the given vector @var{vec}. The return value is\n"
287 "Generally only the superuser can set the process group IDs.")
288 #define FUNC_NAME s_scm_setgroups
297 SCM_VALIDATE_VECTOR (SCM_ARG1
, group_vec
);
299 ngroups
= SCM_SIMPLE_VECTOR_LENGTH (group_vec
);
301 /* validate before allocating, so we don't have to worry about leaks */
302 for (i
= 0; i
< ngroups
; i
++)
304 unsigned long ulong_gid
;
306 SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
),
309 if (gid
!= ulong_gid
)
310 SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
313 size
= ngroups
* sizeof (GETGROUPS_T
);
314 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
315 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
316 groups
= scm_malloc (size
);
317 for(i
= 0; i
< ngroups
; i
++)
318 groups
[i
] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
320 result
= setgroups (ngroups
, groups
);
321 save_errno
= errno
; /* don't let free() touch errno */
326 return SCM_UNSPECIFIED
;
332 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
334 "Look up an entry in the user database. @var{obj} can be an integer,\n"
335 "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
336 "or getpwent respectively.")
337 #define FUNC_NAME s_scm_getpwuid
339 struct passwd
*entry
;
341 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
342 if (SCM_UNBNDP (user
) || scm_is_false (user
))
344 SCM_SYSCALL (entry
= getpwent ());
350 else if (scm_is_integer (user
))
352 entry
= getpwuid (scm_to_int (user
));
356 WITH_STRING (user
, c_user
,
357 entry
= getpwnam (c_user
));
360 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
362 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
363 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
364 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
365 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
366 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
368 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (""));
370 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
371 if (!entry
->pw_shell
)
372 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (""));
374 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
378 #endif /* HAVE_GETPWENT */
382 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
384 "If called with a true argument, initialize or reset the password data\n"
385 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
386 "@code{endpwent} procedures are implemented on top of this.")
387 #define FUNC_NAME s_scm_setpwent
389 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
393 return SCM_UNSPECIFIED
;
400 /* Combines getgrgid and getgrnam. */
401 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
403 "Look up an entry in the group database. @var{obj} can be an integer,\n"
404 "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
405 "or getgrent respectively.")
406 #define FUNC_NAME s_scm_getgrgid
409 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
411 if (SCM_UNBNDP (name
) || scm_is_false (name
))
413 SCM_SYSCALL (entry
= getgrent ());
419 else if (scm_is_integer (name
))
420 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
422 STRING_SYSCALL (name
, c_name
,
423 entry
= getgrnam (c_name
));
427 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
428 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
429 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
430 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
437 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
439 "If called with a true argument, initialize or reset the group data\n"
440 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
441 "@code{endgrent} procedures are implemented on top of this.")
442 #define FUNC_NAME s_scm_setgrent
444 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
448 return SCM_UNSPECIFIED
;
451 #endif /* HAVE_GETGRENT */
454 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
456 "Sends a signal to the specified process or group of processes.\n\n"
457 "@var{pid} specifies the processes to which the signal is sent:\n\n"
459 "@item @var{pid} greater than 0\n"
460 "The process whose identifier is @var{pid}.\n"
461 "@item @var{pid} equal to 0\n"
462 "All processes in the current process group.\n"
463 "@item @var{pid} less than -1\n"
464 "The process group whose identifier is -@var{pid}\n"
465 "@item @var{pid} equal to -1\n"
466 "If the process is privileged, all processes except for some special\n"
467 "system processes. Otherwise, all processes with the current effective\n"
470 "@var{sig} should be specified using a variable corresponding to\n"
471 "the Unix symbolic name, e.g.,\n\n"
476 "Interrupt signal.\n"
478 #define FUNC_NAME s_scm_kill
480 /* Signal values are interned in scm_init_posix(). */
482 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
484 if (scm_to_int (pid
) == getpid ())
485 if (raise (scm_to_int (sig
)) != 0)
488 return SCM_UNSPECIFIED
;
493 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
494 (SCM pid
, SCM options
),
495 "This procedure collects status information from a child process which\n"
496 "has terminated or (optionally) stopped. Normally it will\n"
497 "suspend the calling process until this can be done. If more than one\n"
498 "child process is eligible then one will be chosen by the operating system.\n\n"
499 "The value of @var{pid} determines the behaviour:\n\n"
501 "@item @var{pid} greater than 0\n"
502 "Request status information from the specified child process.\n"
503 "@item @var{pid} equal to -1 or WAIT_ANY\n"
504 "Request status information for any child process.\n"
505 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
506 "Request status information for any child process in the current process\n"
508 "@item @var{pid} less than -1\n"
509 "Request status information for any child process whose process group ID\n"
512 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
513 "values of zero or more of the following variables:\n\n"
515 "Return immediately even if there are no child processes to be collected.\n"
517 "@defvar WUNTRACED\n"
518 "Report status information for stopped processes as well as terminated\n"
521 "The return value is a pair containing:\n\n"
524 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
525 "specified and no process was collected.\n"
527 "The integer status value.\n"
529 #define FUNC_NAME s_scm_waitpid
534 if (SCM_UNBNDP (options
))
538 /* Flags are interned in scm_init_posix. */
539 ioptions
= scm_to_int (options
);
541 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
544 return scm_cons (scm_from_int (i
), scm_from_int (status
));
547 #endif /* HAVE_WAITPID */
550 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
552 "Return the exit status value, as would be set if a process\n"
553 "ended normally through a call to @code{exit} or @code{_exit},\n"
554 "if any, otherwise @code{#f}.")
555 #define FUNC_NAME s_scm_status_exit_val
559 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
561 lstatus
= scm_to_int (status
);
562 if (WIFEXITED (lstatus
))
563 return (scm_from_int (WEXITSTATUS (lstatus
)));
569 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
571 "Return the signal number which terminated the process, if any,\n"
572 "otherwise @code{#f}.")
573 #define FUNC_NAME s_scm_status_term_sig
577 lstatus
= scm_to_int (status
);
578 if (WIFSIGNALED (lstatus
))
579 return scm_from_int (WTERMSIG (lstatus
));
585 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
587 "Return the signal number which stopped the process, if any,\n"
588 "otherwise @code{#f}.")
589 #define FUNC_NAME s_scm_status_stop_sig
593 lstatus
= scm_to_int (status
);
594 if (WIFSTOPPED (lstatus
))
595 return scm_from_int (WSTOPSIG (lstatus
));
600 #endif /* __MINGW32__ */
603 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
605 "Return an integer representing the process ID of the parent\n"
607 #define FUNC_NAME s_scm_getppid
609 return scm_from_int (getppid ());
612 #endif /* HAVE_GETPPID */
616 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
618 "Return an integer representing the current real user ID.")
619 #define FUNC_NAME s_scm_getuid
621 return scm_from_int (getuid ());
627 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
629 "Return an integer representing the current real group ID.")
630 #define FUNC_NAME s_scm_getgid
632 return scm_from_int (getgid ());
638 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
640 "Return an integer representing the current effective user ID.\n"
641 "If the system does not support effective IDs, then the real ID\n"
642 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
643 "system supports effective IDs.")
644 #define FUNC_NAME s_scm_geteuid
647 return scm_from_int (geteuid ());
649 return scm_from_int (getuid ());
655 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
657 "Return an integer representing the current effective group ID.\n"
658 "If the system does not support effective IDs, then the real ID\n"
659 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
660 "system supports effective IDs.")
661 #define FUNC_NAME s_scm_getegid
664 return scm_from_int (getegid ());
666 return scm_from_int (getgid ());
672 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
674 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
675 "the process has appropriate privileges.\n"
676 "The return value is unspecified.")
677 #define FUNC_NAME s_scm_setuid
679 if (setuid (scm_to_int (id
)) != 0)
681 return SCM_UNSPECIFIED
;
685 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
687 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
688 "the process has appropriate privileges.\n"
689 "The return value is unspecified.")
690 #define FUNC_NAME s_scm_setgid
692 if (setgid (scm_to_int (id
)) != 0)
694 return SCM_UNSPECIFIED
;
698 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
700 "Sets the effective user ID to the integer @var{id}, provided the process\n"
701 "has appropriate privileges. If effective IDs are not supported, the\n"
702 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
703 "system supports effective IDs.\n"
704 "The return value is unspecified.")
705 #define FUNC_NAME s_scm_seteuid
710 rv
= seteuid (scm_to_int (id
));
712 rv
= setuid (scm_to_int (id
));
716 return SCM_UNSPECIFIED
;
719 #endif /* __MINGW32__ */
723 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
725 "Sets the effective group ID to the integer @var{id}, provided the process\n"
726 "has appropriate privileges. If effective IDs are not supported, the\n"
727 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
728 "system supports effective IDs.\n"
729 "The return value is unspecified.")
730 #define FUNC_NAME s_scm_setegid
735 rv
= setegid (scm_to_int (id
));
737 rv
= setgid (scm_to_int (id
));
741 return SCM_UNSPECIFIED
;
749 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
751 "Return an integer representing the current process group ID.\n"
752 "This is the POSIX definition, not BSD.")
753 #define FUNC_NAME s_scm_getpgrp
756 fn
= (int (*) ()) getpgrp
;
757 return scm_from_int (fn (0));
760 #endif /* HAVE_GETPGRP */
764 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
766 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
767 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
769 "Fails on systems that do not support job control.\n"
770 "The return value is unspecified.")
771 #define FUNC_NAME s_scm_setpgid
773 /* FIXME(?): may be known as setpgrp. */
774 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
776 return SCM_UNSPECIFIED
;
779 #endif /* HAVE_SETPGID */
782 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
784 "Creates a new session. The current process becomes the session leader\n"
785 "and is put in a new process group. The process will be detached\n"
786 "from its controlling terminal if it has one.\n"
787 "The return value is an integer representing the new process group ID.")
788 #define FUNC_NAME s_scm_setsid
790 pid_t sid
= setsid ();
793 return SCM_UNSPECIFIED
;
796 #endif /* HAVE_SETSID */
799 /* ttyname returns its result in a single static buffer, hence
800 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
801 continuously calling ttyname will otherwise get an overwrite quite
804 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
805 there's probably little to be gained in either speed or parallelism. */
808 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
810 "Return a string with the name of the serial terminal device\n"
811 "underlying @var{port}.")
812 #define FUNC_NAME s_scm_ttyname
818 port
= SCM_COERCE_OUTPORT (port
);
819 SCM_VALIDATE_OPPORT (1, port
);
820 if (!SCM_FPORTP (port
))
822 fd
= SCM_FPORT_FDES (port
);
824 scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex
);
825 SCM_SYSCALL (result
= ttyname (fd
));
827 ret
= scm_from_locale_string (result
);
828 scm_i_pthread_mutex_unlock (&scm_i_misc_mutex
);
838 #endif /* HAVE_TTYNAME */
841 /* For thread safety "buf" is used instead of NULL for the ctermid static
842 buffer. Actually it's unlikely the controlling terminal will change
843 during program execution, and indeed on glibc (2.3.2) it's always just
844 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
845 safety everywhere. */
847 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
849 "Return a string containing the file name of the controlling\n"
850 "terminal for the current process.")
851 #define FUNC_NAME s_scm_ctermid
854 char *result
= ctermid (buf
);
857 return scm_from_locale_string (result
);
860 #endif /* HAVE_CTERMID */
862 #ifdef HAVE_TCGETPGRP
863 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
865 "Return the process group ID of the foreground process group\n"
866 "associated with the terminal open on the file descriptor\n"
867 "underlying @var{port}.\n"
869 "If there is no foreground process group, the return value is a\n"
870 "number greater than 1 that does not match the process group ID\n"
871 "of any existing process group. This can happen if all of the\n"
872 "processes in the job that was formerly the foreground job have\n"
873 "terminated, and no other job has yet been moved into the\n"
875 #define FUNC_NAME s_scm_tcgetpgrp
880 port
= SCM_COERCE_OUTPORT (port
);
882 SCM_VALIDATE_OPFPORT (1, port
);
883 fd
= SCM_FPORT_FDES (port
);
884 if ((pgid
= tcgetpgrp (fd
)) == -1)
886 return scm_from_int (pgid
);
889 #endif /* HAVE_TCGETPGRP */
891 #ifdef HAVE_TCSETPGRP
892 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
893 (SCM port
, SCM pgid
),
894 "Set the foreground process group ID for the terminal used by the file\n"
895 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
896 "The calling process\n"
897 "must be a member of the same session as @var{pgid} and must have the same\n"
898 "controlling terminal. The return value is unspecified.")
899 #define FUNC_NAME s_scm_tcsetpgrp
903 port
= SCM_COERCE_OUTPORT (port
);
905 SCM_VALIDATE_OPFPORT (1, port
);
906 fd
= SCM_FPORT_FDES (port
);
907 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
909 return SCM_UNSPECIFIED
;
912 #endif /* HAVE_TCSETPGRP */
915 free_string_pointers (void *data
)
917 scm_i_free_string_pointers ((char **)data
);
920 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
921 (SCM filename
, SCM args
),
922 "Executes the file named by @var{path} as a new process image.\n"
923 "The remaining arguments are supplied to the process; from a C program\n"
924 "they are accessible as the @code{argv} argument to @code{main}.\n"
925 "Conventionally the first @var{arg} is the same as @var{path}.\n"
926 "All arguments must be strings.\n\n"
927 "If @var{arg} is missing, @var{path} is executed with a null\n"
928 "argument list, which may have system-dependent side-effects.\n\n"
929 "This procedure is currently implemented using the @code{execv} system\n"
930 "call, but we call it @code{execl} because of its Scheme calling interface.")
931 #define FUNC_NAME s_scm_execl
938 exec_file
= scm_to_locale_string (filename
);
939 scm_frame_free (exec_file
);
941 exec_argv
= scm_i_allocate_string_pointers (args
);
942 scm_frame_unwind_handler (free_string_pointers
, exec_argv
,
943 SCM_F_WIND_EXPLICITLY
);
945 execv (exec_file
, exec_argv
);
954 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
955 (SCM filename
, SCM args
),
956 "Similar to @code{execl}, however if\n"
957 "@var{filename} does not contain a slash\n"
958 "then the file to execute will be located by searching the\n"
959 "directories listed in the @code{PATH} environment variable.\n\n"
960 "This procedure is currently implemented using the @code{execvp} system\n"
961 "call, but we call it @code{execlp} because of its Scheme calling interface.")
962 #define FUNC_NAME s_scm_execlp
969 exec_file
= scm_to_locale_string (filename
);
970 scm_frame_free (exec_file
);
972 exec_argv
= scm_i_allocate_string_pointers (args
);
973 scm_frame_unwind_handler (free_string_pointers
, exec_argv
,
974 SCM_F_WIND_EXPLICITLY
);
976 execvp (exec_file
, exec_argv
);
986 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
987 list strings the way environ_list_to_c gives. */
989 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
990 (SCM filename
, SCM env
, SCM args
),
991 "Similar to @code{execl}, but the environment of the new process is\n"
992 "specified by @var{env}, which must be a list of strings as returned by the\n"
993 "@code{environ} procedure.\n\n"
994 "This procedure is currently implemented using the @code{execve} system\n"
995 "call, but we call it @code{execle} because of its Scheme calling interface.")
996 #define FUNC_NAME s_scm_execle
1002 scm_frame_begin (0);
1004 exec_file
= scm_to_locale_string (filename
);
1005 scm_frame_free (exec_file
);
1007 exec_argv
= scm_i_allocate_string_pointers (args
);
1008 scm_frame_unwind_handler (free_string_pointers
, exec_argv
,
1009 SCM_F_WIND_EXPLICITLY
);
1011 exec_env
= scm_i_allocate_string_pointers (env
);
1012 scm_frame_unwind_handler (free_string_pointers
, exec_env
,
1013 SCM_F_WIND_EXPLICITLY
);
1015 execve (exec_file
, exec_argv
, exec_env
);
1025 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1027 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1028 "In the child the return value is 0. In the parent the return value is\n"
1029 "the integer process ID of the child.\n\n"
1030 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1031 "with the scsh fork.")
1032 #define FUNC_NAME s_scm_fork
1038 return scm_from_int (pid
);
1041 #endif /* HAVE_FORK */
1044 # include "win32-uname.h"
1047 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1048 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1050 "Return an object with some information about the computer\n"
1051 "system the program is running on.")
1052 #define FUNC_NAME s_scm_uname
1055 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1056 if (uname (&buf
) < 0)
1058 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1059 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1060 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1061 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1062 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1065 SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1070 #endif /* HAVE_UNAME */
1072 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1074 "If @var{env} is omitted, return the current environment (in the\n"
1075 "Unix sense) as a list of strings. Otherwise set the current\n"
1076 "environment, which is also the default environment for child\n"
1077 "processes, to the supplied list of strings. Each member of\n"
1078 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1079 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1080 "then the return value is unspecified.")
1081 #define FUNC_NAME s_scm_environ
1083 if (SCM_UNBNDP (env
))
1084 return scm_makfromstrs (-1, environ
);
1089 new_environ
= scm_i_allocate_string_pointers (env
);
1090 /* Free the old environment, except when called for the first
1094 static int first
= 1;
1096 scm_i_free_string_pointers (environ
);
1099 environ
= new_environ
;
1100 return SCM_UNSPECIFIED
;
1107 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1109 "Return a name in the file system that does not match any\n"
1110 "existing file. However there is no guarantee that another\n"
1111 "process will not create the file after @code{tmpnam} is called.\n"
1112 "Care should be taken if opening the file, e.g., use the\n"
1113 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1114 #define FUNC_NAME s_scm_tmpnam
1116 char name
[L_tmpnam
];
1119 SCM_SYSCALL (rv
= tmpnam (name
));
1121 /* not SCM_SYSERROR since errno probably not set. */
1122 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1123 return scm_from_locale_string (name
);
1129 #ifndef HAVE_MKSTEMP
1130 extern int mkstemp (char *);
1133 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1135 "Create a new unique file in the file system and returns a new\n"
1136 "buffered port open for reading and writing to the file.\n"
1138 "@var{tmpl} is a string specifying where the file should be\n"
1139 "created: it must end with @samp{XXXXXX} and will be changed in\n"
1140 "place to return the name of the temporary file.\n"
1142 "The file is created with mode @code{0600}, which means read and\n"
1143 "write for the owner only. @code{chmod} can be used to change\n"
1145 #define FUNC_NAME s_scm_mkstemp
1150 scm_frame_begin (0);
1152 c_tmpl
= scm_to_locale_string (tmpl
);
1153 scm_frame_free (c_tmpl
);
1155 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1159 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1160 SCM_INUM0
, scm_string_length (tmpl
),
1164 return scm_fdes_to_port (rv
, "w+", tmpl
);
1168 SCM_DEFINE (scm_utime
, "utime", 1, 2, 0,
1169 (SCM pathname
, SCM actime
, SCM modtime
),
1170 "@code{utime} sets the access and modification times for the\n"
1171 "file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1172 "not supplied, then the current time is used. @var{actime} and\n"
1173 "@var{modtime} must be integer time values as returned by the\n"
1174 "@code{current-time} procedure.\n"
1176 "(utime \"foo\" (- (current-time) 3600))\n"
1178 "will set the access time to one hour in the past and the\n"
1179 "modification time to the current time.")
1180 #define FUNC_NAME s_scm_utime
1183 struct utimbuf utm_tmp
;
1185 if (SCM_UNBNDP (actime
))
1186 SCM_SYSCALL (time (&utm_tmp
.actime
));
1188 utm_tmp
.actime
= SCM_NUM2ULONG (2, actime
);
1190 if (SCM_UNBNDP (modtime
))
1191 SCM_SYSCALL (time (&utm_tmp
.modtime
));
1193 utm_tmp
.modtime
= SCM_NUM2ULONG (3, modtime
);
1195 STRING_SYSCALL (pathname
, c_pathname
,
1196 rv
= utime (c_pathname
, &utm_tmp
));
1199 return SCM_UNSPECIFIED
;
1203 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1204 (SCM path
, SCM how
),
1205 "Test accessibility of a file under the real UID and GID of the\n"
1206 "calling process. The return is @code{#t} if @var{path} exists\n"
1207 "and the permissions requested by @var{how} are all allowed, or\n"
1208 "@code{#f} if not.\n"
1210 "@var{how} is an integer which is one of the following values,\n"
1211 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1214 "Test for read permission.\n"
1217 "Test for write permission.\n"
1220 "Test for execute permission.\n"
1223 "Test for existence of the file. This is implied by each of the\n"
1224 "other tests, so there's no need to combine it with them.\n"
1227 "It's important to note that @code{access?} does not simply\n"
1228 "indicate what will happen on attempting to read or write a\n"
1229 "file. In normal circumstances it does, but in a set-UID or\n"
1230 "set-GID program it doesn't because @code{access?} tests the\n"
1231 "real ID, whereas an open or execute attempt uses the effective\n"
1234 "A program which will never run set-UID/GID can ignore the\n"
1235 "difference between real and effective IDs, but for maximum\n"
1236 "generality, especially in library functions, it's best not to\n"
1237 "use @code{access?} to predict the result of an open or execute,\n"
1238 "instead simply attempt that and catch any exception.\n"
1240 "The main use for @code{access?} is to let a set-UID/GID program\n"
1241 "determine what the invoking user would have been allowed to do,\n"
1242 "without the greater (or perhaps lesser) privileges afforded by\n"
1243 "the effective ID. For more on this, see ``Testing File\n"
1244 "Access'' in The GNU C Library Reference Manual.")
1245 #define FUNC_NAME s_scm_access
1249 WITH_STRING (path
, c_path
,
1250 rv
= access (c_path
, scm_to_int (how
)));
1251 return scm_from_bool (!rv
);
1255 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1257 "Return an integer representing the current process ID.")
1258 #define FUNC_NAME s_scm_getpid
1260 return scm_from_ulong (getpid ());
1264 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1266 "Modifies the environment of the current process, which is\n"
1267 "also the default environment inherited by child processes.\n\n"
1268 "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1269 "directly into the environment, replacing any existing environment string\n"
1271 "name matching @code{NAME}. If @var{string} does not contain an equal\n"
1272 "sign, then any existing string with name matching @var{string} will\n"
1274 "The return value is unspecified.")
1275 #define FUNC_NAME s_scm_putenv
1278 char *c_str
= scm_to_locale_string (str
);
1280 size_t len
= strlen (c_str
);
1283 if (strchr (c_str
, '=') == NULL
)
1285 #ifdef HAVE_UNSETENV
1286 /* No '=' in argument means we should remove the variable from
1287 the environment. Not all putenvs understand this (for instance
1288 FreeBSD 4.8 doesn't). To be safe, we do it explicitely using
1293 /* On e.g. Win32 hosts putenv() called with 'name=' removes the
1294 environment variable 'name'. */
1296 char *ptr
= scm_malloc (len
+ 2);
1297 strcpy (ptr
, c_str
);
1298 strcpy (ptr
+len
, "=");
1300 e
= errno
; free (ptr
); free (c_str
); errno
= e
;
1303 #endif /* !HAVE_UNSETENV */
1308 /* If str is "FOO=", ie. attempting to set an empty string, then
1309 we need to see if it's been successful. On MINGW, "FOO="
1310 means remove FOO from the environment. As a workaround, we
1311 set "FOO= ", ie. a space, and then modify the string returned
1312 by getenv. It's not enough just to modify the string we set,
1313 because MINGW putenv copies it. */
1315 if (c_str
[len
-1] == '=')
1317 char *ptr
= scm_malloc (len
+2);
1318 strcpy (ptr
, c_str
);
1319 strcpy (ptr
+len
, " ");
1328 /* truncate to just the name */
1329 c_str
[len
-1] = '\0';
1330 ptr
= getenv (c_str
);
1333 return SCM_UNSPECIFIED
;
1335 #endif /* __MINGW32__ */
1337 /* Leave c_str in the environment. */
1339 rv
= putenv (c_str
);
1343 return SCM_UNSPECIFIED
;
1347 #ifdef HAVE_SETLOCALE
1348 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1349 (SCM category
, SCM locale
),
1350 "If @var{locale} is omitted, return the current value of the\n"
1351 "specified locale category as a system-dependent string.\n"
1352 "@var{category} should be specified using the values\n"
1353 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1355 "Otherwise the specified locale category is set to the string\n"
1356 "@var{locale} and the new value is returned as a\n"
1357 "system-dependent string. If @var{locale} is an empty string,\n"
1358 "the locale will be set using environment variables.")
1359 #define FUNC_NAME s_scm_setlocale
1364 scm_frame_begin (0);
1366 if (SCM_UNBNDP (locale
))
1372 clocale
= scm_to_locale_string (locale
);
1373 scm_frame_free (clocale
);
1376 rv
= setlocale (scm_i_to_lc_category (category
, 1), clocale
);
1379 /* POSIX and C99 don't say anything about setlocale setting errno, so
1380 force a sensible value here. glibc leaves ENOENT, which would be
1381 fine, but it's not a documented feature. */
1387 return scm_from_locale_string (rv
);
1390 #endif /* HAVE_SETLOCALE */
1393 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1394 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1395 "Creates a new special file, such as a file corresponding to a device.\n"
1396 "@var{path} specifies the name of the file. @var{type} should\n"
1397 "be one of the following symbols:\n"
1398 "regular, directory, symlink, block-special, char-special,\n"
1399 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1400 "@var{dev} (an integer) specifies which device the special file refers\n"
1401 "to. Its exact interpretation depends on the kind of special file\n"
1402 "being created.\n\n"
1405 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1407 "The return value is unspecified.")
1408 #define FUNC_NAME s_scm_mknod
1414 SCM_VALIDATE_STRING (1, path
);
1415 SCM_VALIDATE_SYMBOL (2, type
);
1417 p
= scm_i_symbol_chars (type
);
1418 if (strcmp (p
, "regular") == 0)
1420 else if (strcmp (p
, "directory") == 0)
1422 else if (strcmp (p
, "symlink") == 0)
1424 else if (strcmp (p
, "block-special") == 0)
1426 else if (strcmp (p
, "char-special") == 0)
1428 else if (strcmp (p
, "fifo") == 0)
1431 else if (strcmp (p
, "socket") == 0)
1435 SCM_OUT_OF_RANGE (2, type
);
1437 STRING_SYSCALL (path
, c_path
,
1438 val
= mknod (c_path
,
1439 ctype
| scm_to_int (perms
),
1443 return SCM_UNSPECIFIED
;
1446 #endif /* HAVE_MKNOD */
1449 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1451 "Increment the priority of the current process by @var{incr}. A higher\n"
1452 "priority value means that the process runs less often.\n"
1453 "The return value is unspecified.")
1454 #define FUNC_NAME s_scm_nice
1456 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1457 from "prio-NZERO", so an error must be detected from errno changed */
1459 nice (scm_to_int (incr
));
1462 return SCM_UNSPECIFIED
;
1465 #endif /* HAVE_NICE */
1468 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1470 "Flush the operating system disk buffers.\n"
1471 "The return value is unspecified.")
1472 #define FUNC_NAME s_scm_sync
1475 return SCM_UNSPECIFIED
;
1478 #endif /* HAVE_SYNC */
1481 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1482 to avoid another thread overwriting it. A test program running crypt
1483 continuously in two threads can be quickly seen tripping this problem.
1484 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1486 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1487 slower (about 5x) than plain crypt if you pass an uninitialized data
1488 block each time. Presumably there's some one-time setups. The best way
1489 to use crypt_r for parallel execution in multiple threads would probably
1490 be to maintain a little pool of initialized crypt_data structures, take
1491 one and use it, then return it to the pool. That pool could be garbage
1492 collected so it didn't add permanently to memory use if only a few crypt
1493 calls are made. But we expect crypt will be used rarely, and even more
1494 rarely will there be any desire for lots of parallel execution on
1495 multiple cpus. So for now we don't bother with anything fancy, just
1499 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1500 (SCM key
, SCM salt
),
1501 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1502 "crypt(3) library call.")
1503 #define FUNC_NAME s_scm_crypt
1506 char *c_key
, *c_salt
;
1508 scm_frame_begin (0);
1509 scm_i_frame_pthread_mutex_lock (&scm_i_misc_mutex
);
1511 c_key
= scm_to_locale_string (key
);
1512 scm_frame_free (c_key
);
1513 c_salt
= scm_to_locale_string (salt
);
1514 scm_frame_free (c_salt
);
1516 ret
= scm_from_locale_string (crypt (c_key
, c_salt
));
1522 #endif /* HAVE_CRYPT */
1525 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1527 "Change the root directory to that specified in @var{path}.\n"
1528 "This directory will be used for path names beginning with\n"
1529 "@file{/}. The root directory is inherited by all children\n"
1530 "of the current process. Only the superuser may change the\n"
1532 #define FUNC_NAME s_scm_chroot
1536 WITH_STRING (path
, c_path
,
1537 rv
= chroot (c_path
));
1540 return SCM_UNSPECIFIED
;
1543 #endif /* HAVE_CHROOT */
1547 /* Wrapper function to supplying `getlogin()' under Windows. */
1548 static char * getlogin (void)
1550 static char user
[256];
1551 static unsigned long len
= 256;
1553 if (!GetUserName (user
, &len
))
1557 #endif /* __MINGW32__ */
1560 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1561 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1563 "Return a string containing the name of the user logged in on\n"
1564 "the controlling terminal of the process, or @code{#f} if this\n"
1565 "information cannot be obtained.")
1566 #define FUNC_NAME s_scm_getlogin
1573 return scm_from_locale_string (p
);
1576 #endif /* HAVE_GETLOGIN */
1579 SCM_DEFINE (scm_cuserid
, "cuserid", 0, 0, 0,
1581 "Return a string containing a user name associated with the\n"
1582 "effective user id of the process. Return @code{#f} if this\n"
1583 "information cannot be obtained.")
1584 #define FUNC_NAME s_scm_cuserid
1586 char buf
[L_cuserid
];
1592 return scm_from_locale_string (p
);
1595 #endif /* HAVE_CUSERID */
1597 #if HAVE_GETPRIORITY
1598 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1599 (SCM which
, SCM who
),
1600 "Return the scheduling priority of the process, process group\n"
1601 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1602 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1603 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1604 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1605 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1606 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1607 "denotes the current process, process group, or user. Return\n"
1608 "the highest priority (lowest numerical value) of any of the\n"
1609 "specified processes.")
1610 #define FUNC_NAME s_scm_getpriority
1612 int cwhich
, cwho
, ret
;
1614 cwhich
= scm_to_int (which
);
1615 cwho
= scm_to_int (who
);
1617 /* We have to clear errno and examine it later, because -1 is a
1618 legal return value for getpriority(). */
1620 ret
= getpriority (cwhich
, cwho
);
1623 return scm_from_int (ret
);
1626 #endif /* HAVE_GETPRIORITY */
1628 #if HAVE_SETPRIORITY
1629 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1630 (SCM which
, SCM who
, SCM prio
),
1631 "Set the scheduling priority of the process, process group\n"
1632 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1633 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1634 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1635 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1636 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1637 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1638 "denotes the current process, process group, or user.\n"
1639 "@var{prio} is a value in the range -20 and 20, the default\n"
1640 "priority is 0; lower priorities cause more favorable\n"
1641 "scheduling. Sets the priority of all of the specified\n"
1642 "processes. Only the super-user may lower priorities.\n"
1643 "The return value is not specified.")
1644 #define FUNC_NAME s_scm_setpriority
1646 int cwhich
, cwho
, cprio
;
1648 cwhich
= scm_to_int (which
);
1649 cwho
= scm_to_int (who
);
1650 cprio
= scm_to_int (prio
);
1652 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1654 return SCM_UNSPECIFIED
;
1657 #endif /* HAVE_SETPRIORITY */
1660 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
1662 "Display @var{prompt} to the standard error output and read\n"
1663 "a password from @file{/dev/tty}. If this file is not\n"
1664 "accessible, it reads from standard input. The password may be\n"
1665 "up to 127 characters in length. Additional characters and the\n"
1666 "terminating newline character are discarded. While reading\n"
1667 "the password, echoing and the generation of signals by special\n"
1668 "characters is disabled.")
1669 #define FUNC_NAME s_scm_getpass
1674 SCM_VALIDATE_STRING (1, prompt
);
1676 WITH_STRING (prompt
, c_prompt
,
1677 p
= getpass(c_prompt
));
1678 passwd
= scm_from_locale_string (p
);
1680 /* Clear out the password in the static buffer. */
1681 memset (p
, 0, strlen (p
));
1686 #endif /* HAVE_GETPASS */
1688 /* Wrapper function for flock() support under M$-Windows. */
1691 # include <sys/locking.h>
1694 /* Current MinGW package fails to define this. *sigh* */
1695 # define _LK_UNLCK 0
1702 static int flock (int fd
, int operation
)
1707 /* Disable invalid arguments. */
1708 if (((operation
& (LOCK_EX
| LOCK_SH
)) == (LOCK_EX
| LOCK_SH
)) ||
1709 ((operation
& (LOCK_EX
| LOCK_UN
)) == (LOCK_EX
| LOCK_UN
)) ||
1710 ((operation
& (LOCK_SH
| LOCK_UN
)) == (LOCK_SH
| LOCK_UN
)))
1716 /* Determine mode of operation and discard unsupported ones. */
1717 if (operation
== (LOCK_NB
| LOCK_EX
))
1718 operation
= _LK_NBLCK
;
1719 else if (operation
& LOCK_UN
)
1720 operation
= _LK_UNLCK
;
1721 else if (operation
== LOCK_EX
)
1722 operation
= _LK_LOCK
;
1729 /* Save current file pointer and seek to beginning. */
1730 if ((pos
= lseek (fd
, 0, SEEK_CUR
)) == -1 || (len
= filelength (fd
)) == -1)
1732 lseek (fd
, 0L, SEEK_SET
);
1734 /* Deadlock if necessary. */
1737 ret
= _locking (fd
, operation
, len
);
1739 while (ret
== -1 && errno
== EDEADLOCK
);
1741 /* Produce meaningful error message. */
1742 if (errno
== EACCES
&& operation
== _LK_NBLCK
)
1747 /* Return to saved file position pointer. */
1748 lseek (fd
, pos
, SEEK_SET
);
1752 #endif /* __MINGW32__ */
1754 #if HAVE_FLOCK || defined (__MINGW32__)
1755 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
1756 (SCM file
, SCM operation
),
1757 "Apply or remove an advisory lock on an open file.\n"
1758 "@var{operation} specifies the action to be done:\n"
1761 "Shared lock. More than one process may hold a shared lock\n"
1762 "for a given file at a given time.\n"
1765 "Exclusive lock. Only one process may hold an exclusive lock\n"
1766 "for a given file at a given time.\n"
1769 "Unlock the file.\n"
1772 "Don't block when locking. This is combined with one of the\n"
1773 "other operations using @code{logior}. If @code{flock} would\n"
1774 "block an @code{EWOULDBLOCK} error is thrown.\n"
1777 "The return value is not specified. @var{file} may be an open\n"
1778 "file descriptor or an open file descriptor port.\n"
1780 "Note that @code{flock} does not lock files across NFS.")
1781 #define FUNC_NAME s_scm_flock
1785 if (scm_is_integer (file
))
1786 fdes
= scm_to_int (file
);
1789 SCM_VALIDATE_OPFPORT (2, file
);
1791 fdes
= SCM_FPORT_FDES (file
);
1793 if (flock (fdes
, scm_to_int (operation
)) == -1)
1795 return SCM_UNSPECIFIED
;
1798 #endif /* HAVE_FLOCK */
1800 #if HAVE_SETHOSTNAME
1801 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
1803 "Set the host name of the current processor to @var{name}. May\n"
1804 "only be used by the superuser. The return value is not\n"
1806 #define FUNC_NAME s_scm_sethostname
1810 WITH_STRING (name
, c_name
,
1811 rv
= sethostname (c_name
, strlen(c_name
)));
1814 return SCM_UNSPECIFIED
;
1817 #endif /* HAVE_SETHOSTNAME */
1820 #if HAVE_GETHOSTNAME
1821 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
1823 "Return the host name of the current processor.")
1824 #define FUNC_NAME s_scm_gethostname
1826 #ifdef MAXHOSTNAMELEN
1828 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
1829 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
1830 const int len
= MAXHOSTNAMELEN
+ 1;
1831 char *const p
= scm_malloc (len
);
1832 const int res
= gethostname (p
, len
);
1834 scm_frame_begin (0);
1835 scm_frame_unwind_handler (free
, p
, 0);
1839 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
1840 * large enough. SUSv2 specifies 255 maximum too, apparently. */
1845 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
1847 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
1848 * which may reflect a particular kernel configuration.
1849 * Must watch out for this existing but giving -1, as happens for instance
1850 * in gnu/linux glibc 2.3.2. */
1852 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
1859 p
= scm_malloc (len
);
1861 scm_frame_begin (0);
1862 scm_frame_unwind_handler (free
, p
, 0);
1864 res
= gethostname (p
, len
);
1865 while (res
== -1 && errno
== ENAMETOOLONG
)
1869 /* scm_realloc may throw an exception. */
1870 p
= scm_realloc (p
, len
);
1871 res
= gethostname (p
, len
);
1878 const int save_errno
= errno
;
1880 // No guile exceptions can occur before we have freed p's memory.
1889 /* scm_from_locale_string may throw an exception. */
1890 const SCM name
= scm_from_locale_string (p
);
1892 // No guile exceptions can occur before we have freed p's memory.
1900 #endif /* HAVE_GETHOSTNAME */
1906 scm_add_feature ("posix");
1908 scm_add_feature ("EIDs");
1911 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
1914 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
1917 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
1920 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
1923 /* access() symbols. */
1924 scm_c_define ("R_OK", scm_from_int (R_OK
));
1925 scm_c_define ("W_OK", scm_from_int (W_OK
));
1926 scm_c_define ("X_OK", scm_from_int (X_OK
));
1927 scm_c_define ("F_OK", scm_from_int (F_OK
));
1930 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
1933 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
1936 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
1939 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
1942 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
1945 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
1948 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
1951 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
1954 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
1957 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
1960 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
1962 #ifdef LC_MEASUREMENT
1963 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
1965 #ifdef LC_IDENTIFICATION
1966 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
1969 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
1973 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
1976 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
1979 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
1983 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
1986 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
1989 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
1992 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
1995 #include "libguile/cpp_sig_symbols.c"
1996 #include "libguile/posix.x"