1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "libguile/_scm.h"
28 #include "libguile/dynwind.h"
29 #include "libguile/fports.h"
30 #include "libguile/scmsigs.h"
31 #include "libguile/feature.h"
32 #include "libguile/strings.h"
33 #include "libguile/srfi-13.h"
34 #include "libguile/srfi-14.h"
35 #include "libguile/vectors.h"
36 #include "libguile/lang.h"
38 #include "libguile/validate.h"
39 #include "libguile/posix.h"
40 #include "libguile/gettext.h"
41 #include "libguile/threads.h"
47 #ifdef TIME_WITH_SYS_TIME
48 # include <sys/time.h>
52 # include <sys/time.h>
62 extern char *ttyname();
66 #ifdef LIBC_H_WITH_UNISTD_H
70 #include <sys/types.h>
80 #ifdef HAVE_WINSOCK2_H
85 /* Some defines for Windows here. */
87 # define pipe(fd) _pipe (fd, 256, O_BINARY)
88 #endif /* __MINGW32__ */
91 # include <sys/wait.h>
94 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
97 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
102 extern char ** environ
;
107 #ifdef HAVE_SYS_UTSNAME_H
108 #include <sys/utsname.h>
111 #ifdef HAVE_SETLOCALE
115 #if (defined HAVE_NEWLOCALE) && (defined HAVE_STRCOLL_L)
116 # define USE_GNU_LOCALE_API
119 #if (defined USE_GNU_LOCALE_API) && (defined HAVE_XLOCALE_H)
120 # include <xlocale.h>
128 #include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
131 #ifdef HAVE_SYS_PARAM_H
132 #include <sys/param.h> /* for MAXHOSTNAMELEN */
135 #if HAVE_SYS_RESOURCE_H
136 # include <sys/resource.h>
140 # include <sys/file.h>
143 #if HAVE_CRT_EXTERNS_H
144 #include <crt_externs.h> /* for Darwin _NSGetEnviron */
147 /* Some Unix systems don't define these. CPP hair is dangerous, but
148 this seems safe enough... */
165 /* No prototype for this on Solaris 10. The man page says it's in
166 <unistd.h> ... but it lies. */
167 #if ! HAVE_DECL_SETHOSTNAME
168 int sethostname (char *name
, size_t namelen
);
171 /* On NextStep, <utime.h> doesn't define struct utime, unless we
172 #define _POSIX_SOURCE before #including it. I think this is less
173 of a kludge than defining struct utimbuf ourselves. */
174 #ifdef UTIMBUF_NEEDS_POSIX
175 #define _POSIX_SOURCE
178 #ifdef HAVE_SYS_UTIME_H
179 #include <sys/utime.h>
186 /* Please don't add any more #includes or #defines here. The hack
187 above means that _POSIX_SOURCE may be #defined, which will
188 encourage header files to do strange things.
190 FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
192 FIXME: Probably should do all the includes first, then all the fallback
193 declarations and defines, in case things are not in the header we
199 /* On Apple Darwin in a shared library there's no "environ" to access
200 directly, instead the address of that variable must be obtained with
202 #if HAVE__NSGETENVIRON && defined (PIC)
203 #define environ (*_NSGetEnviron())
208 /* Two often used patterns
211 #define WITH_STRING(str,cstr,code) \
213 char *cstr = scm_to_locale_string (str); \
218 #define STRING_SYSCALL(str,cstr,code) \
221 char *cstr = scm_to_locale_string (str); \
222 SCM_SYSCALL (code); \
223 eno = errno; free (cstr); errno = eno; \
228 SCM_SYMBOL (sym_read_pipe
, "read pipe");
229 SCM_SYMBOL (sym_write_pipe
, "write pipe");
231 SCM_DEFINE (scm_pipe
, "pipe", 0, 0, 0,
233 "Return a newly created pipe: a pair of ports which are linked\n"
234 "together on the local machine. The @emph{car} is the input\n"
235 "port and the @emph{cdr} is the output port. Data written (and\n"
236 "flushed) to the output port can be read from the input port.\n"
237 "Pipes are commonly used for communication with a newly forked\n"
238 "child process. The need to flush the output port can be\n"
239 "avoided by making it unbuffered using @code{setvbuf}.\n"
241 "Writes occur atomically provided the size of the data in bytes\n"
242 "is not greater than the value of @code{PIPE_BUF}. Note that\n"
243 "the output port is likely to block if too much data (typically\n"
244 "equal to @code{PIPE_BUF}) has been written but not yet read\n"
245 "from the input port.")
246 #define FUNC_NAME s_scm_pipe
255 p_rd
= scm_fdes_to_port (fd
[0], "r", sym_read_pipe
);
256 p_wt
= scm_fdes_to_port (fd
[1], "w", sym_write_pipe
);
257 return scm_cons (p_rd
, p_wt
);
262 #ifdef HAVE_GETGROUPS
263 SCM_DEFINE (scm_getgroups
, "getgroups", 0, 0, 0,
265 "Return a vector of integers representing the current\n"
266 "supplementary group IDs.")
267 #define FUNC_NAME s_scm_getgroups
274 ngroups
= getgroups (0, NULL
);
278 size
= ngroups
* sizeof (GETGROUPS_T
);
279 groups
= scm_malloc (size
);
280 ngroups
= getgroups (ngroups
, groups
);
282 result
= scm_c_make_vector (ngroups
, SCM_BOOL_F
);
283 while (--ngroups
>= 0)
284 SCM_SIMPLE_VECTOR_SET (result
, ngroups
, scm_from_ulong (groups
[ngroups
]));
292 #ifdef HAVE_SETGROUPS
293 SCM_DEFINE (scm_setgroups
, "setgroups", 1, 0, 0,
295 "Set the current set of supplementary group IDs to the integers\n"
296 "in the given vector @var{vec}. The return value is\n"
299 "Generally only the superuser can set the process group IDs.")
300 #define FUNC_NAME s_scm_setgroups
309 SCM_VALIDATE_VECTOR (SCM_ARG1
, group_vec
);
311 ngroups
= SCM_SIMPLE_VECTOR_LENGTH (group_vec
);
313 /* validate before allocating, so we don't have to worry about leaks */
314 for (i
= 0; i
< ngroups
; i
++)
316 unsigned long ulong_gid
;
318 SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
),
321 if (gid
!= ulong_gid
)
322 SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
325 size
= ngroups
* sizeof (GETGROUPS_T
);
326 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
327 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
328 groups
= scm_malloc (size
);
329 for(i
= 0; i
< ngroups
; i
++)
330 groups
[i
] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
332 result
= setgroups (ngroups
, groups
);
333 save_errno
= errno
; /* don't let free() touch errno */
338 return SCM_UNSPECIFIED
;
344 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
346 "Look up an entry in the user database. @var{obj} can be an integer,\n"
347 "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
348 "or getpwent respectively.")
349 #define FUNC_NAME s_scm_getpwuid
351 struct passwd
*entry
;
353 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
354 if (SCM_UNBNDP (user
) || scm_is_false (user
))
356 SCM_SYSCALL (entry
= getpwent ());
362 else if (scm_is_integer (user
))
364 entry
= getpwuid (scm_to_int (user
));
368 WITH_STRING (user
, c_user
,
369 entry
= getpwnam (c_user
));
372 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
374 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
375 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
376 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
377 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
378 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
380 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (""));
382 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
383 if (!entry
->pw_shell
)
384 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (""));
386 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
390 #endif /* HAVE_GETPWENT */
394 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
396 "If called with a true argument, initialize or reset the password data\n"
397 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
398 "@code{endpwent} procedures are implemented on top of this.")
399 #define FUNC_NAME s_scm_setpwent
401 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
405 return SCM_UNSPECIFIED
;
412 /* Combines getgrgid and getgrnam. */
413 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
415 "Look up an entry in the group database. @var{obj} can be an integer,\n"
416 "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
417 "or getgrent respectively.")
418 #define FUNC_NAME s_scm_getgrgid
421 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
423 if (SCM_UNBNDP (name
) || scm_is_false (name
))
425 SCM_SYSCALL (entry
= getgrent ());
431 else if (scm_is_integer (name
))
432 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
434 STRING_SYSCALL (name
, c_name
,
435 entry
= getgrnam (c_name
));
439 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
440 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
441 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
442 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
449 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
451 "If called with a true argument, initialize or reset the group data\n"
452 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
453 "@code{endgrent} procedures are implemented on top of this.")
454 #define FUNC_NAME s_scm_setgrent
456 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
460 return SCM_UNSPECIFIED
;
463 #endif /* HAVE_GETGRENT */
466 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
468 "Sends a signal to the specified process or group of processes.\n\n"
469 "@var{pid} specifies the processes to which the signal is sent:\n\n"
471 "@item @var{pid} greater than 0\n"
472 "The process whose identifier is @var{pid}.\n"
473 "@item @var{pid} equal to 0\n"
474 "All processes in the current process group.\n"
475 "@item @var{pid} less than -1\n"
476 "The process group whose identifier is -@var{pid}\n"
477 "@item @var{pid} equal to -1\n"
478 "If the process is privileged, all processes except for some special\n"
479 "system processes. Otherwise, all processes with the current effective\n"
482 "@var{sig} should be specified using a variable corresponding to\n"
483 "the Unix symbolic name, e.g.,\n\n"
488 "Interrupt signal.\n"
490 #define FUNC_NAME s_scm_kill
492 /* Signal values are interned in scm_init_posix(). */
494 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
497 /* Mingw has raise(), but not kill(). (Other raw DOS environments might
498 be similar.) Use raise() when the requested pid is our own process,
500 if (scm_to_int (pid
) == getpid ())
502 if (raise (scm_to_int (sig
)) != 0)
514 return SCM_UNSPECIFIED
;
519 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
520 (SCM pid
, SCM options
),
521 "This procedure collects status information from a child process which\n"
522 "has terminated or (optionally) stopped. Normally it will\n"
523 "suspend the calling process until this can be done. If more than one\n"
524 "child process is eligible then one will be chosen by the operating system.\n\n"
525 "The value of @var{pid} determines the behaviour:\n\n"
527 "@item @var{pid} greater than 0\n"
528 "Request status information from the specified child process.\n"
529 "@item @var{pid} equal to -1 or WAIT_ANY\n"
530 "Request status information for any child process.\n"
531 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
532 "Request status information for any child process in the current process\n"
534 "@item @var{pid} less than -1\n"
535 "Request status information for any child process whose process group ID\n"
538 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
539 "values of zero or more of the following variables:\n\n"
541 "Return immediately even if there are no child processes to be collected.\n"
543 "@defvar WUNTRACED\n"
544 "Report status information for stopped processes as well as terminated\n"
547 "The return value is a pair containing:\n\n"
550 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
551 "specified and no process was collected.\n"
553 "The integer status value.\n"
555 #define FUNC_NAME s_scm_waitpid
560 if (SCM_UNBNDP (options
))
564 /* Flags are interned in scm_init_posix. */
565 ioptions
= scm_to_int (options
);
567 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
570 return scm_cons (scm_from_int (i
), scm_from_int (status
));
573 #endif /* HAVE_WAITPID */
576 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
578 "Return the exit status value, as would be set if a process\n"
579 "ended normally through a call to @code{exit} or @code{_exit},\n"
580 "if any, otherwise @code{#f}.")
581 #define FUNC_NAME s_scm_status_exit_val
585 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
587 lstatus
= scm_to_int (status
);
588 if (WIFEXITED (lstatus
))
589 return (scm_from_int (WEXITSTATUS (lstatus
)));
595 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
597 "Return the signal number which terminated the process, if any,\n"
598 "otherwise @code{#f}.")
599 #define FUNC_NAME s_scm_status_term_sig
603 lstatus
= scm_to_int (status
);
604 if (WIFSIGNALED (lstatus
))
605 return scm_from_int (WTERMSIG (lstatus
));
611 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
613 "Return the signal number which stopped the process, if any,\n"
614 "otherwise @code{#f}.")
615 #define FUNC_NAME s_scm_status_stop_sig
619 lstatus
= scm_to_int (status
);
620 if (WIFSTOPPED (lstatus
))
621 return scm_from_int (WSTOPSIG (lstatus
));
626 #endif /* __MINGW32__ */
629 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
631 "Return an integer representing the process ID of the parent\n"
633 #define FUNC_NAME s_scm_getppid
635 return scm_from_int (getppid ());
638 #endif /* HAVE_GETPPID */
642 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
644 "Return an integer representing the current real user ID.")
645 #define FUNC_NAME s_scm_getuid
647 return scm_from_int (getuid ());
653 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
655 "Return an integer representing the current real group ID.")
656 #define FUNC_NAME s_scm_getgid
658 return scm_from_int (getgid ());
664 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
666 "Return an integer representing the current effective user ID.\n"
667 "If the system does not support effective IDs, then the real ID\n"
668 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
669 "system supports effective IDs.")
670 #define FUNC_NAME s_scm_geteuid
673 return scm_from_int (geteuid ());
675 return scm_from_int (getuid ());
681 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
683 "Return an integer representing the current effective group ID.\n"
684 "If the system does not support effective IDs, then the real ID\n"
685 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
686 "system supports effective IDs.")
687 #define FUNC_NAME s_scm_getegid
690 return scm_from_int (getegid ());
692 return scm_from_int (getgid ());
698 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
700 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
701 "the process has appropriate privileges.\n"
702 "The return value is unspecified.")
703 #define FUNC_NAME s_scm_setuid
705 if (setuid (scm_to_int (id
)) != 0)
707 return SCM_UNSPECIFIED
;
711 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
713 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
714 "the process has appropriate privileges.\n"
715 "The return value is unspecified.")
716 #define FUNC_NAME s_scm_setgid
718 if (setgid (scm_to_int (id
)) != 0)
720 return SCM_UNSPECIFIED
;
724 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
726 "Sets the effective user ID to the integer @var{id}, provided the process\n"
727 "has appropriate privileges. If effective IDs are not supported, the\n"
728 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
729 "system supports effective IDs.\n"
730 "The return value is unspecified.")
731 #define FUNC_NAME s_scm_seteuid
736 rv
= seteuid (scm_to_int (id
));
738 rv
= setuid (scm_to_int (id
));
742 return SCM_UNSPECIFIED
;
745 #endif /* __MINGW32__ */
749 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
751 "Sets the effective group ID to the integer @var{id}, provided the process\n"
752 "has appropriate privileges. If effective IDs are not supported, the\n"
753 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
754 "system supports effective IDs.\n"
755 "The return value is unspecified.")
756 #define FUNC_NAME s_scm_setegid
761 rv
= setegid (scm_to_int (id
));
763 rv
= setgid (scm_to_int (id
));
767 return SCM_UNSPECIFIED
;
775 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
777 "Return an integer representing the current process group ID.\n"
778 "This is the POSIX definition, not BSD.")
779 #define FUNC_NAME s_scm_getpgrp
782 fn
= (int (*) ()) getpgrp
;
783 return scm_from_int (fn (0));
786 #endif /* HAVE_GETPGRP */
790 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
792 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
793 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
795 "Fails on systems that do not support job control.\n"
796 "The return value is unspecified.")
797 #define FUNC_NAME s_scm_setpgid
799 /* FIXME(?): may be known as setpgrp. */
800 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
802 return SCM_UNSPECIFIED
;
805 #endif /* HAVE_SETPGID */
808 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
810 "Creates a new session. The current process becomes the session leader\n"
811 "and is put in a new process group. The process will be detached\n"
812 "from its controlling terminal if it has one.\n"
813 "The return value is an integer representing the new process group ID.")
814 #define FUNC_NAME s_scm_setsid
816 pid_t sid
= setsid ();
819 return SCM_UNSPECIFIED
;
822 #endif /* HAVE_SETSID */
825 /* ttyname returns its result in a single static buffer, hence
826 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
827 continuously calling ttyname will otherwise get an overwrite quite
830 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
831 there's probably little to be gained in either speed or parallelism. */
834 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
836 "Return a string with the name of the serial terminal device\n"
837 "underlying @var{port}.")
838 #define FUNC_NAME s_scm_ttyname
842 SCM ret
= SCM_BOOL_F
;
844 port
= SCM_COERCE_OUTPORT (port
);
845 SCM_VALIDATE_OPPORT (1, port
);
846 if (!SCM_FPORTP (port
))
848 fd
= SCM_FPORT_FDES (port
);
850 scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex
);
852 SCM_SYSCALL (result
= ttyname (fd
));
855 result
= strdup (result
);
857 scm_i_pthread_mutex_unlock (&scm_i_misc_mutex
);
865 ret
= scm_take_locale_string (result
);
870 #endif /* HAVE_TTYNAME */
873 /* For thread safety "buf" is used instead of NULL for the ctermid static
874 buffer. Actually it's unlikely the controlling terminal will change
875 during program execution, and indeed on glibc (2.3.2) it's always just
876 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
877 safety everywhere. */
879 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
881 "Return a string containing the file name of the controlling\n"
882 "terminal for the current process.")
883 #define FUNC_NAME s_scm_ctermid
886 char *result
= ctermid (buf
);
889 return scm_from_locale_string (result
);
892 #endif /* HAVE_CTERMID */
894 #ifdef HAVE_TCGETPGRP
895 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
897 "Return the process group ID of the foreground process group\n"
898 "associated with the terminal open on the file descriptor\n"
899 "underlying @var{port}.\n"
901 "If there is no foreground process group, the return value is a\n"
902 "number greater than 1 that does not match the process group ID\n"
903 "of any existing process group. This can happen if all of the\n"
904 "processes in the job that was formerly the foreground job have\n"
905 "terminated, and no other job has yet been moved into the\n"
907 #define FUNC_NAME s_scm_tcgetpgrp
912 port
= SCM_COERCE_OUTPORT (port
);
914 SCM_VALIDATE_OPFPORT (1, port
);
915 fd
= SCM_FPORT_FDES (port
);
916 if ((pgid
= tcgetpgrp (fd
)) == -1)
918 return scm_from_int (pgid
);
921 #endif /* HAVE_TCGETPGRP */
923 #ifdef HAVE_TCSETPGRP
924 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
925 (SCM port
, SCM pgid
),
926 "Set the foreground process group ID for the terminal used by the file\n"
927 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
928 "The calling process\n"
929 "must be a member of the same session as @var{pgid} and must have the same\n"
930 "controlling terminal. The return value is unspecified.")
931 #define FUNC_NAME s_scm_tcsetpgrp
935 port
= SCM_COERCE_OUTPORT (port
);
937 SCM_VALIDATE_OPFPORT (1, port
);
938 fd
= SCM_FPORT_FDES (port
);
939 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
941 return SCM_UNSPECIFIED
;
944 #endif /* HAVE_TCSETPGRP */
946 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
947 (SCM filename
, SCM args
),
948 "Executes the file named by @var{path} as a new process image.\n"
949 "The remaining arguments are supplied to the process; from a C program\n"
950 "they are accessible as the @code{argv} argument to @code{main}.\n"
951 "Conventionally the first @var{arg} is the same as @var{path}.\n"
952 "All arguments must be strings.\n\n"
953 "If @var{arg} is missing, @var{path} is executed with a null\n"
954 "argument list, which may have system-dependent side-effects.\n\n"
955 "This procedure is currently implemented using the @code{execv} system\n"
956 "call, but we call it @code{execl} because of its Scheme calling interface.")
957 #define FUNC_NAME s_scm_execl
962 scm_dynwind_begin (0);
964 exec_file
= scm_to_locale_string (filename
);
965 scm_dynwind_free (exec_file
);
967 exec_argv
= scm_i_allocate_string_pointers (args
);
971 /* extra "const" in mingw formals, provokes warning from gcc */
972 (const char * const *)
983 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
984 (SCM filename
, SCM args
),
985 "Similar to @code{execl}, however if\n"
986 "@var{filename} does not contain a slash\n"
987 "then the file to execute will be located by searching the\n"
988 "directories listed in the @code{PATH} environment variable.\n\n"
989 "This procedure is currently implemented using the @code{execvp} system\n"
990 "call, but we call it @code{execlp} because of its Scheme calling interface.")
991 #define FUNC_NAME s_scm_execlp
996 scm_dynwind_begin (0);
998 exec_file
= scm_to_locale_string (filename
);
999 scm_dynwind_free (exec_file
);
1001 exec_argv
= scm_i_allocate_string_pointers (args
);
1005 /* extra "const" in mingw formals, provokes warning from gcc */
1006 (const char * const *)
1018 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
1019 list strings the way environ_list_to_c gives. */
1021 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
1022 (SCM filename
, SCM env
, SCM args
),
1023 "Similar to @code{execl}, but the environment of the new process is\n"
1024 "specified by @var{env}, which must be a list of strings as returned by the\n"
1025 "@code{environ} procedure.\n\n"
1026 "This procedure is currently implemented using the @code{execve} system\n"
1027 "call, but we call it @code{execle} because of its Scheme calling interface.")
1028 #define FUNC_NAME s_scm_execle
1034 scm_dynwind_begin (0);
1036 exec_file
= scm_to_locale_string (filename
);
1037 scm_dynwind_free (exec_file
);
1039 exec_argv
= scm_i_allocate_string_pointers (args
);
1040 exec_env
= scm_i_allocate_string_pointers (env
);
1044 /* extra "const" in mingw formals, provokes warning from gcc */
1045 (const char * const *)
1049 /* extra "const" in mingw formals, provokes warning from gcc */
1050 (const char * const *)
1062 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1064 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1065 "In the child the return value is 0. In the parent the return value is\n"
1066 "the integer process ID of the child.\n\n"
1067 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1068 "with the scsh fork.")
1069 #define FUNC_NAME s_scm_fork
1075 return scm_from_int (pid
);
1078 #endif /* HAVE_FORK */
1081 # include "win32-uname.h"
1084 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1085 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1087 "Return an object with some information about the computer\n"
1088 "system the program is running on.")
1089 #define FUNC_NAME s_scm_uname
1092 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1093 if (uname (&buf
) < 0)
1095 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1096 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1097 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1098 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1099 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1102 SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1107 #endif /* HAVE_UNAME */
1109 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1111 "If @var{env} is omitted, return the current environment (in the\n"
1112 "Unix sense) as a list of strings. Otherwise set the current\n"
1113 "environment, which is also the default environment for child\n"
1114 "processes, to the supplied list of strings. Each member of\n"
1115 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1116 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1117 "then the return value is unspecified.")
1118 #define FUNC_NAME s_scm_environ
1120 if (SCM_UNBNDP (env
))
1121 return scm_makfromstrs (-1, environ
);
1124 environ
= scm_i_allocate_string_pointers (env
);
1125 return SCM_UNSPECIFIED
;
1132 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1134 "Return a name in the file system that does not match any\n"
1135 "existing file. However there is no guarantee that another\n"
1136 "process will not create the file after @code{tmpnam} is called.\n"
1137 "Care should be taken if opening the file, e.g., use the\n"
1138 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1139 #define FUNC_NAME s_scm_tmpnam
1141 char name
[L_tmpnam
];
1144 SCM_SYSCALL (rv
= tmpnam (name
));
1146 /* not SCM_SYSERROR since errno probably not set. */
1147 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1148 return scm_from_locale_string (name
);
1154 #ifndef HAVE_MKSTEMP
1155 extern int mkstemp (char *);
1158 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1160 "Create a new unique file in the file system and return a new\n"
1161 "buffered port open for reading and writing to the file.\n"
1163 "@var{tmpl} is a string specifying where the file should be\n"
1164 "created: it must end with @samp{XXXXXX} and those @samp{X}s\n"
1165 "will be changed in the string to return the name of the file.\n"
1166 "(@code{port-filename} on the port also gives the name.)\n"
1168 "POSIX doesn't specify the permissions mode of the file, on GNU\n"
1169 "and most systems it's @code{#o600}. An application can use\n"
1170 "@code{chmod} to relax that if desired. For example\n"
1171 "@code{#o666} less @code{umask}, which is usual for ordinary\n"
1175 "(let ((port (mkstemp! (string-copy \"/tmp/myfile-XXXXXX\"))))\n"
1176 " (chmod port (logand #o666 (lognot (umask))))\n"
1179 #define FUNC_NAME s_scm_mkstemp
1184 scm_dynwind_begin (0);
1186 c_tmpl
= scm_to_locale_string (tmpl
);
1187 scm_dynwind_free (c_tmpl
);
1189 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1193 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1194 SCM_INUM0
, scm_string_length (tmpl
),
1198 return scm_fdes_to_port (rv
, "w+", tmpl
);
1202 SCM_DEFINE (scm_utime
, "utime", 1, 2, 0,
1203 (SCM pathname
, SCM actime
, SCM modtime
),
1204 "@code{utime} sets the access and modification times for the\n"
1205 "file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1206 "not supplied, then the current time is used. @var{actime} and\n"
1207 "@var{modtime} must be integer time values as returned by the\n"
1208 "@code{current-time} procedure.\n"
1210 "(utime \"foo\" (- (current-time) 3600))\n"
1212 "will set the access time to one hour in the past and the\n"
1213 "modification time to the current time.")
1214 #define FUNC_NAME s_scm_utime
1217 struct utimbuf utm_tmp
;
1219 if (SCM_UNBNDP (actime
))
1220 SCM_SYSCALL (time (&utm_tmp
.actime
));
1222 utm_tmp
.actime
= SCM_NUM2ULONG (2, actime
);
1224 if (SCM_UNBNDP (modtime
))
1225 SCM_SYSCALL (time (&utm_tmp
.modtime
));
1227 utm_tmp
.modtime
= SCM_NUM2ULONG (3, modtime
);
1229 STRING_SYSCALL (pathname
, c_pathname
,
1230 rv
= utime (c_pathname
, &utm_tmp
));
1233 return SCM_UNSPECIFIED
;
1237 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1238 (SCM path
, SCM how
),
1239 "Test accessibility of a file under the real UID and GID of the\n"
1240 "calling process. The return is @code{#t} if @var{path} exists\n"
1241 "and the permissions requested by @var{how} are all allowed, or\n"
1242 "@code{#f} if not.\n"
1244 "@var{how} is an integer which is one of the following values,\n"
1245 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1248 "Test for read permission.\n"
1251 "Test for write permission.\n"
1254 "Test for execute permission.\n"
1257 "Test for existence of the file. This is implied by each of the\n"
1258 "other tests, so there's no need to combine it with them.\n"
1261 "It's important to note that @code{access?} does not simply\n"
1262 "indicate what will happen on attempting to read or write a\n"
1263 "file. In normal circumstances it does, but in a set-UID or\n"
1264 "set-GID program it doesn't because @code{access?} tests the\n"
1265 "real ID, whereas an open or execute attempt uses the effective\n"
1268 "A program which will never run set-UID/GID can ignore the\n"
1269 "difference between real and effective IDs, but for maximum\n"
1270 "generality, especially in library functions, it's best not to\n"
1271 "use @code{access?} to predict the result of an open or execute,\n"
1272 "instead simply attempt that and catch any exception.\n"
1274 "The main use for @code{access?} is to let a set-UID/GID program\n"
1275 "determine what the invoking user would have been allowed to do,\n"
1276 "without the greater (or perhaps lesser) privileges afforded by\n"
1277 "the effective ID. For more on this, see ``Testing File\n"
1278 "Access'' in The GNU C Library Reference Manual.")
1279 #define FUNC_NAME s_scm_access
1283 WITH_STRING (path
, c_path
,
1284 rv
= access (c_path
, scm_to_int (how
)));
1285 return scm_from_bool (!rv
);
1289 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1291 "Return an integer representing the current process ID.")
1292 #define FUNC_NAME s_scm_getpid
1294 return scm_from_ulong (getpid ());
1298 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1300 "Modifies the environment of the current process, which is\n"
1301 "also the default environment inherited by child processes.\n\n"
1302 "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1303 "directly into the environment, replacing any existing environment string\n"
1305 "name matching @code{NAME}. If @var{string} does not contain an equal\n"
1306 "sign, then any existing string with name matching @var{string} will\n"
1308 "The return value is unspecified.")
1309 #define FUNC_NAME s_scm_putenv
1312 char *c_str
= scm_to_locale_string (str
);
1314 if (strchr (c_str
, '=') == NULL
)
1316 /* We want no "=" in the argument to mean remove the variable from the
1317 environment, but not all putenv()s understand this, for example
1318 FreeBSD 4.8 doesn't. Getting it happening everywhere is a bit
1319 painful. What unsetenv() exists, we use that, of course.
1321 Traditionally putenv("NAME") removes a variable, for example that's
1322 what we have to do on Solaris 9 (it doesn't have an unsetenv).
1324 But on DOS and on that DOS overlay manager thing called W-whatever,
1325 putenv("NAME=") must be used (it too doesn't have an unsetenv).
1327 Supposedly on AIX a putenv("NAME") could cause a segfault, but also
1328 supposedly AIX 5.3 and up has unsetenv() available so should be ok
1329 with the latter there.
1331 For the moment we hard code the DOS putenv("NAME=") style under
1332 __MINGW32__ and do the traditional everywhere else. Such
1333 system-name tests are bad, of course. It'd be possible to use a
1334 configure test when doing a a native build. For example GNU R has
1335 such a test (see R_PUTENV_AS_UNSETENV in
1336 https://svn.r-project.org/R/trunk/m4/R.m4). But when cross
1337 compiling there'd want to be a guess, one probably based on the
1338 system name (ie. mingw or not), thus landing back in basically the
1339 present hard-coded situation. Another possibility for a cross
1340 build would be to try "NAME" then "NAME=" at runtime, if that's not
1341 too much like overkill. */
1344 /* when unsetenv() exists then we use it */
1347 #elif defined (__MINGW32__)
1348 /* otherwise putenv("NAME=") on DOS */
1350 size_t len
= strlen (c_str
);
1351 char *ptr
= scm_malloc (len
+ 2);
1352 strcpy (ptr
, c_str
);
1353 strcpy (ptr
+len
, "=");
1355 e
= errno
; free (ptr
); free (c_str
); errno
= e
;
1359 /* otherwise traditional putenv("NAME") */
1360 rv
= putenv (c_str
);
1368 /* If str is "FOO=", ie. attempting to set an empty string, then
1369 we need to see if it's been successful. On MINGW, "FOO="
1370 means remove FOO from the environment. As a workaround, we
1371 set "FOO= ", ie. a space, and then modify the string returned
1372 by getenv. It's not enough just to modify the string we set,
1373 because MINGW putenv copies it. */
1376 size_t len
= strlen (c_str
);
1377 if (c_str
[len
-1] == '=')
1379 char *ptr
= scm_malloc (len
+2);
1380 strcpy (ptr
, c_str
);
1381 strcpy (ptr
+len
, " ");
1390 /* truncate to just the name */
1391 c_str
[len
-1] = '\0';
1392 ptr
= getenv (c_str
);
1395 return SCM_UNSPECIFIED
;
1398 #endif /* __MINGW32__ */
1400 /* Leave c_str in the environment. */
1402 rv
= putenv (c_str
);
1406 return SCM_UNSPECIFIED
;
1410 /* This mutex is used to serialize invocations of `setlocale ()' on non-GNU
1411 systems (i.e., systems where a reentrant locale API is not available). It
1412 is also acquired before calls to `nl_langinfo ()'. See `i18n.c' for
1414 scm_i_pthread_mutex_t scm_i_locale_mutex
= SCM_I_PTHREAD_MUTEX_INITIALIZER
;
1416 #ifdef HAVE_SETLOCALE
1418 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1419 (SCM category
, SCM locale
),
1420 "If @var{locale} is omitted, return the current value of the\n"
1421 "specified locale category as a system-dependent string.\n"
1422 "@var{category} should be specified using the values\n"
1423 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1425 "Otherwise the specified locale category is set to the string\n"
1426 "@var{locale} and the new value is returned as a\n"
1427 "system-dependent string. If @var{locale} is an empty string,\n"
1428 "the locale will be set using environment variables.")
1429 #define FUNC_NAME s_scm_setlocale
1435 scm_dynwind_begin (0);
1437 if (SCM_UNBNDP (locale
))
1443 clocale
= scm_to_locale_string (locale
);
1444 scm_dynwind_free (clocale
);
1447 c_category
= scm_i_to_lc_category (category
, 1);
1449 scm_i_pthread_mutex_lock (&scm_i_locale_mutex
);
1450 rv
= setlocale (c_category
, clocale
);
1451 scm_i_pthread_mutex_unlock (&scm_i_locale_mutex
);
1455 /* POSIX and C99 don't say anything about setlocale setting errno, so
1456 force a sensible value here. glibc leaves ENOENT, which would be
1457 fine, but it's not a documented feature. */
1462 /* Recompute the standard SRFI-14 character sets in a locale-dependent
1463 (actually charset-dependent) way. */
1464 scm_srfi_14_compute_char_sets ();
1467 return scm_from_locale_string (rv
);
1470 #endif /* HAVE_SETLOCALE */
1473 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1474 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1475 "Creates a new special file, such as a file corresponding to a device.\n"
1476 "@var{path} specifies the name of the file. @var{type} should\n"
1477 "be one of the following symbols:\n"
1478 "regular, directory, symlink, block-special, char-special,\n"
1479 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1480 "@var{dev} (an integer) specifies which device the special file refers\n"
1481 "to. Its exact interpretation depends on the kind of special file\n"
1482 "being created.\n\n"
1485 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1487 "The return value is unspecified.")
1488 #define FUNC_NAME s_scm_mknod
1494 SCM_VALIDATE_STRING (1, path
);
1495 SCM_VALIDATE_SYMBOL (2, type
);
1497 p
= scm_i_symbol_chars (type
);
1498 if (strcmp (p
, "regular") == 0)
1500 else if (strcmp (p
, "directory") == 0)
1503 /* systems without symlinks probably don't have S_IFLNK defined */
1504 else if (strcmp (p
, "symlink") == 0)
1507 else if (strcmp (p
, "block-special") == 0)
1509 else if (strcmp (p
, "char-special") == 0)
1511 else if (strcmp (p
, "fifo") == 0)
1514 else if (strcmp (p
, "socket") == 0)
1518 SCM_OUT_OF_RANGE (2, type
);
1520 STRING_SYSCALL (path
, c_path
,
1521 val
= mknod (c_path
,
1522 ctype
| scm_to_int (perms
),
1526 return SCM_UNSPECIFIED
;
1529 #endif /* HAVE_MKNOD */
1532 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1534 "Increment the priority of the current process by @var{incr}. A higher\n"
1535 "priority value means that the process runs less often.\n"
1536 "The return value is unspecified.")
1537 #define FUNC_NAME s_scm_nice
1541 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1542 from "prio-NZERO", so an error must be detected from errno changed */
1544 nice_value
= nice (scm_to_int (incr
));
1548 return SCM_UNSPECIFIED
;
1551 #endif /* HAVE_NICE */
1554 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1556 "Flush the operating system disk buffers.\n"
1557 "The return value is unspecified.")
1558 #define FUNC_NAME s_scm_sync
1561 return SCM_UNSPECIFIED
;
1564 #endif /* HAVE_SYNC */
1567 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1568 to avoid another thread overwriting it. A test program running crypt
1569 continuously in two threads can be quickly seen tripping this problem.
1570 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1572 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1573 slower (about 5x) than plain crypt if you pass an uninitialized data
1574 block each time. Presumably there's some one-time setups. The best way
1575 to use crypt_r for parallel execution in multiple threads would probably
1576 be to maintain a little pool of initialized crypt_data structures, take
1577 one and use it, then return it to the pool. That pool could be garbage
1578 collected so it didn't add permanently to memory use if only a few crypt
1579 calls are made. But we expect crypt will be used rarely, and even more
1580 rarely will there be any desire for lots of parallel execution on
1581 multiple cpus. So for now we don't bother with anything fancy, just
1585 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1586 (SCM key
, SCM salt
),
1587 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1588 "crypt(3) library call.")
1589 #define FUNC_NAME s_scm_crypt
1592 char *c_key
, *c_salt
, *c_ret
;
1594 scm_dynwind_begin (0);
1595 scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex
);
1597 c_key
= scm_to_locale_string (key
);
1598 scm_dynwind_free (c_key
);
1599 c_salt
= scm_to_locale_string (salt
);
1600 scm_dynwind_free (c_salt
);
1602 /* The Linux crypt(3) man page says crypt will return NULL and set errno
1603 on error. (Eg. ENOSYS if legal restrictions mean it cannot be
1605 c_ret
= crypt (c_key
, c_salt
);
1609 ret
= scm_from_locale_string (c_ret
);
1614 #endif /* HAVE_CRYPT */
1617 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1619 "Change the root directory to that specified in @var{path}.\n"
1620 "This directory will be used for path names beginning with\n"
1621 "@file{/}. The root directory is inherited by all children\n"
1622 "of the current process. Only the superuser may change the\n"
1624 #define FUNC_NAME s_scm_chroot
1628 WITH_STRING (path
, c_path
,
1629 rv
= chroot (c_path
));
1632 return SCM_UNSPECIFIED
;
1635 #endif /* HAVE_CHROOT */
1639 /* Wrapper function to supplying `getlogin()' under Windows. */
1640 static char * getlogin (void)
1642 static char user
[256];
1643 static unsigned long len
= 256;
1645 if (!GetUserName (user
, &len
))
1649 #endif /* __MINGW32__ */
1652 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1653 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1655 "Return a string containing the name of the user logged in on\n"
1656 "the controlling terminal of the process, or @code{#f} if this\n"
1657 "information cannot be obtained.")
1658 #define FUNC_NAME s_scm_getlogin
1665 return scm_from_locale_string (p
);
1668 #endif /* HAVE_GETLOGIN */
1671 SCM_DEFINE (scm_cuserid
, "cuserid", 0, 0, 0,
1673 "Return a string containing a user name associated with the\n"
1674 "effective user id of the process. Return @code{#f} if this\n"
1675 "information cannot be obtained.")
1676 #define FUNC_NAME s_scm_cuserid
1678 char buf
[L_cuserid
];
1684 return scm_from_locale_string (p
);
1687 #endif /* HAVE_CUSERID */
1689 #if HAVE_GETPRIORITY
1690 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1691 (SCM which
, SCM who
),
1692 "Return the scheduling priority of the process, process group\n"
1693 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1694 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1695 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1696 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1697 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1698 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1699 "denotes the current process, process group, or user. Return\n"
1700 "the highest priority (lowest numerical value) of any of the\n"
1701 "specified processes.")
1702 #define FUNC_NAME s_scm_getpriority
1704 int cwhich
, cwho
, ret
;
1706 cwhich
= scm_to_int (which
);
1707 cwho
= scm_to_int (who
);
1709 /* We have to clear errno and examine it later, because -1 is a
1710 legal return value for getpriority(). */
1712 ret
= getpriority (cwhich
, cwho
);
1715 return scm_from_int (ret
);
1718 #endif /* HAVE_GETPRIORITY */
1720 #if HAVE_SETPRIORITY
1721 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1722 (SCM which
, SCM who
, SCM prio
),
1723 "Set the scheduling priority of the process, process group\n"
1724 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1725 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1726 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1727 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1728 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1729 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1730 "denotes the current process, process group, or user.\n"
1731 "@var{prio} is a value in the range -20 and 20, the default\n"
1732 "priority is 0; lower priorities cause more favorable\n"
1733 "scheduling. Sets the priority of all of the specified\n"
1734 "processes. Only the super-user may lower priorities.\n"
1735 "The return value is not specified.")
1736 #define FUNC_NAME s_scm_setpriority
1738 int cwhich
, cwho
, cprio
;
1740 cwhich
= scm_to_int (which
);
1741 cwho
= scm_to_int (who
);
1742 cprio
= scm_to_int (prio
);
1744 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1746 return SCM_UNSPECIFIED
;
1749 #endif /* HAVE_SETPRIORITY */
1752 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
1754 "Display @var{prompt} to the standard error output and read\n"
1755 "a password from @file{/dev/tty}. If this file is not\n"
1756 "accessible, it reads from standard input. The password may be\n"
1757 "up to 127 characters in length. Additional characters and the\n"
1758 "terminating newline character are discarded. While reading\n"
1759 "the password, echoing and the generation of signals by special\n"
1760 "characters is disabled.")
1761 #define FUNC_NAME s_scm_getpass
1766 SCM_VALIDATE_STRING (1, prompt
);
1768 WITH_STRING (prompt
, c_prompt
,
1769 p
= getpass(c_prompt
));
1770 passwd
= scm_from_locale_string (p
);
1772 /* Clear out the password in the static buffer. */
1773 memset (p
, 0, strlen (p
));
1778 #endif /* HAVE_GETPASS */
1780 /* Wrapper function for flock() support under M$-Windows. */
1783 # include <sys/locking.h>
1786 /* Current MinGW package fails to define this. *sigh* */
1787 # define _LK_UNLCK 0
1794 static int flock (int fd
, int operation
)
1799 /* Disable invalid arguments. */
1800 if (((operation
& (LOCK_EX
| LOCK_SH
)) == (LOCK_EX
| LOCK_SH
)) ||
1801 ((operation
& (LOCK_EX
| LOCK_UN
)) == (LOCK_EX
| LOCK_UN
)) ||
1802 ((operation
& (LOCK_SH
| LOCK_UN
)) == (LOCK_SH
| LOCK_UN
)))
1808 /* Determine mode of operation and discard unsupported ones. */
1809 if (operation
== (LOCK_NB
| LOCK_EX
))
1810 operation
= _LK_NBLCK
;
1811 else if (operation
& LOCK_UN
)
1812 operation
= _LK_UNLCK
;
1813 else if (operation
== LOCK_EX
)
1814 operation
= _LK_LOCK
;
1821 /* Save current file pointer and seek to beginning. */
1822 if ((pos
= lseek (fd
, 0, SEEK_CUR
)) == -1 || (len
= filelength (fd
)) == -1)
1824 lseek (fd
, 0L, SEEK_SET
);
1826 /* Deadlock if necessary. */
1829 ret
= _locking (fd
, operation
, len
);
1831 while (ret
== -1 && errno
== EDEADLOCK
);
1833 /* Produce meaningful error message. */
1834 if (errno
== EACCES
&& operation
== _LK_NBLCK
)
1839 /* Return to saved file position pointer. */
1840 lseek (fd
, pos
, SEEK_SET
);
1844 #endif /* __MINGW32__ */
1846 #if HAVE_FLOCK || defined (__MINGW32__)
1847 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
1848 (SCM file
, SCM operation
),
1849 "Apply or remove an advisory lock on an open file.\n"
1850 "@var{operation} specifies the action to be done:\n"
1853 "Shared lock. More than one process may hold a shared lock\n"
1854 "for a given file at a given time.\n"
1857 "Exclusive lock. Only one process may hold an exclusive lock\n"
1858 "for a given file at a given time.\n"
1861 "Unlock the file.\n"
1864 "Don't block when locking. This is combined with one of the\n"
1865 "other operations using @code{logior}. If @code{flock} would\n"
1866 "block an @code{EWOULDBLOCK} error is thrown.\n"
1869 "The return value is not specified. @var{file} may be an open\n"
1870 "file descriptor or an open file descriptor port.\n"
1872 "Note that @code{flock} does not lock files across NFS.")
1873 #define FUNC_NAME s_scm_flock
1877 if (scm_is_integer (file
))
1878 fdes
= scm_to_int (file
);
1881 SCM_VALIDATE_OPFPORT (2, file
);
1883 fdes
= SCM_FPORT_FDES (file
);
1885 if (flock (fdes
, scm_to_int (operation
)) == -1)
1887 return SCM_UNSPECIFIED
;
1890 #endif /* HAVE_FLOCK */
1892 #if HAVE_SETHOSTNAME
1893 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
1895 "Set the host name of the current processor to @var{name}. May\n"
1896 "only be used by the superuser. The return value is not\n"
1898 #define FUNC_NAME s_scm_sethostname
1902 WITH_STRING (name
, c_name
,
1903 rv
= sethostname (c_name
, strlen(c_name
)));
1906 return SCM_UNSPECIFIED
;
1909 #endif /* HAVE_SETHOSTNAME */
1912 #if HAVE_GETHOSTNAME
1913 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
1915 "Return the host name of the current processor.")
1916 #define FUNC_NAME s_scm_gethostname
1918 #ifdef MAXHOSTNAMELEN
1920 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
1921 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
1922 const int len
= MAXHOSTNAMELEN
+ 1;
1923 char *const p
= scm_malloc (len
);
1924 const int res
= gethostname (p
, len
);
1926 scm_dynwind_begin (0);
1927 scm_dynwind_unwind_handler (free
, p
, 0);
1931 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
1932 * large enough. SUSv2 specifies 255 maximum too, apparently. */
1937 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
1939 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
1940 * which may reflect a particular kernel configuration.
1941 * Must watch out for this existing but giving -1, as happens for instance
1942 * in gnu/linux glibc 2.3.2. */
1944 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
1951 p
= scm_malloc (len
);
1953 scm_dynwind_begin (0);
1954 scm_dynwind_unwind_handler (free
, p
, 0);
1956 res
= gethostname (p
, len
);
1957 while (res
== -1 && errno
== ENAMETOOLONG
)
1961 /* scm_realloc may throw an exception. */
1962 p
= scm_realloc (p
, len
);
1963 res
= gethostname (p
, len
);
1970 const int save_errno
= errno
;
1972 /* No guile exceptions can occur before we have freed p's memory. */
1981 /* scm_from_locale_string may throw an exception. */
1982 const SCM name
= scm_from_locale_string (p
);
1984 /* No guile exceptions can occur before we have freed p's memory. */
1992 #endif /* HAVE_GETHOSTNAME */
1998 scm_add_feature ("posix");
2000 scm_add_feature ("EIDs");
2003 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
2006 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
2009 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
2012 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
2015 /* access() symbols. */
2016 scm_c_define ("R_OK", scm_from_int (R_OK
));
2017 scm_c_define ("W_OK", scm_from_int (W_OK
));
2018 scm_c_define ("X_OK", scm_from_int (X_OK
));
2019 scm_c_define ("F_OK", scm_from_int (F_OK
));
2022 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
2025 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
2028 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
2031 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
2034 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
2037 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
2040 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
2043 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
2046 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
2049 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
2052 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
2054 #ifdef LC_MEASUREMENT
2055 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
2057 #ifdef LC_IDENTIFICATION
2058 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
2061 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
2065 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
2068 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
2071 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
2075 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
2078 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
2081 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
2084 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
2087 #include "libguile/cpp_sig_symbols.c"
2088 #include "libguile/posix.x"