1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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/values.h"
37 #include "libguile/lang.h"
39 #include "libguile/validate.h"
40 #include "libguile/posix.h"
41 #include "libguile/gettext.h"
42 #include "libguile/threads.h"
48 #ifdef TIME_WITH_SYS_TIME
49 # include <sys/time.h>
53 # include <sys/time.h>
63 extern char *ttyname();
67 #ifdef LIBC_H_WITH_UNISTD_H
71 #include <sys/types.h>
81 #ifdef HAVE_WINSOCK2_H
86 /* Some defines for Windows here. */
88 # define pipe(fd) _pipe (fd, 256, O_BINARY)
89 #endif /* __MINGW32__ */
92 # include <sys/wait.h>
95 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
98 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
103 extern char ** environ
;
108 #ifdef HAVE_SYS_UTSNAME_H
109 #include <sys/utsname.h>
112 #ifdef HAVE_SETLOCALE
116 #if (defined HAVE_NEWLOCALE) && (defined HAVE_STRCOLL_L)
117 # define USE_GNU_LOCALE_API
120 #if (defined USE_GNU_LOCALE_API) && (defined HAVE_XLOCALE_H)
121 # include <xlocale.h>
129 #include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
132 #ifdef HAVE_SYS_PARAM_H
133 #include <sys/param.h> /* for MAXHOSTNAMELEN */
136 #if HAVE_SYS_RESOURCE_H
137 # include <sys/resource.h>
141 # include <sys/file.h>
144 #if HAVE_CRT_EXTERNS_H
145 #include <crt_externs.h> /* for Darwin _NSGetEnviron */
148 /* Some Unix systems don't define these. CPP hair is dangerous, but
149 this seems safe enough... */
166 /* No prototype for this on Solaris 10. The man page says it's in
167 <unistd.h> ... but it lies. */
168 #if ! HAVE_DECL_SETHOSTNAME
169 int sethostname (char *name
, size_t namelen
);
172 /* On NextStep, <utime.h> doesn't define struct utime, unless we
173 #define _POSIX_SOURCE before #including it. I think this is less
174 of a kludge than defining struct utimbuf ourselves. */
175 #ifdef UTIMBUF_NEEDS_POSIX
176 #define _POSIX_SOURCE
179 #ifdef HAVE_SYS_UTIME_H
180 #include <sys/utime.h>
187 /* Please don't add any more #includes or #defines here. The hack
188 above means that _POSIX_SOURCE may be #defined, which will
189 encourage header files to do strange things.
191 FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
193 FIXME: Probably should do all the includes first, then all the fallback
194 declarations and defines, in case things are not in the header we
200 /* On Apple Darwin in a shared library there's no "environ" to access
201 directly, instead the address of that variable must be obtained with
203 #if HAVE__NSGETENVIRON && defined (PIC)
204 #define environ (*_NSGetEnviron())
209 /* Two often used patterns
212 #define WITH_STRING(str,cstr,code) \
214 char *cstr = scm_to_locale_string (str); \
219 #define STRING_SYSCALL(str,cstr,code) \
222 char *cstr = scm_to_locale_string (str); \
223 SCM_SYSCALL (code); \
224 eno = errno; free (cstr); errno = eno; \
229 SCM_SYMBOL (sym_read_pipe
, "read pipe");
230 SCM_SYMBOL (sym_write_pipe
, "write pipe");
232 SCM_DEFINE (scm_pipe
, "pipe", 0, 0, 0,
234 "Return a newly created pipe: a pair of ports which are linked\n"
235 "together on the local machine. The @emph{car} is the input\n"
236 "port and the @emph{cdr} is the output port. Data written (and\n"
237 "flushed) to the output port can be read from the input port.\n"
238 "Pipes are commonly used for communication with a newly forked\n"
239 "child process. The need to flush the output port can be\n"
240 "avoided by making it unbuffered using @code{setvbuf}.\n"
242 "Writes occur atomically provided the size of the data in bytes\n"
243 "is not greater than the value of @code{PIPE_BUF}. Note that\n"
244 "the output port is likely to block if too much data (typically\n"
245 "equal to @code{PIPE_BUF}) has been written but not yet read\n"
246 "from the input port.")
247 #define FUNC_NAME s_scm_pipe
256 p_rd
= scm_fdes_to_port (fd
[0], "r", sym_read_pipe
);
257 p_wt
= scm_fdes_to_port (fd
[1], "w", sym_write_pipe
);
258 return scm_cons (p_rd
, p_wt
);
263 #ifdef HAVE_GETGROUPS
264 SCM_DEFINE (scm_getgroups
, "getgroups", 0, 0, 0,
266 "Return a vector of integers representing the current\n"
267 "supplementary group IDs.")
268 #define FUNC_NAME s_scm_getgroups
275 ngroups
= getgroups (0, NULL
);
279 size
= ngroups
* sizeof (GETGROUPS_T
);
280 groups
= scm_malloc (size
);
281 ngroups
= getgroups (ngroups
, groups
);
283 result
= scm_c_make_vector (ngroups
, SCM_BOOL_F
);
284 while (--ngroups
>= 0)
285 SCM_SIMPLE_VECTOR_SET (result
, ngroups
, scm_from_ulong (groups
[ngroups
]));
293 #ifdef HAVE_SETGROUPS
294 SCM_DEFINE (scm_setgroups
, "setgroups", 1, 0, 0,
296 "Set the current set of supplementary group IDs to the integers\n"
297 "in the given vector @var{vec}. The return value is\n"
300 "Generally only the superuser can set the process group IDs.")
301 #define FUNC_NAME s_scm_setgroups
310 SCM_VALIDATE_VECTOR (SCM_ARG1
, group_vec
);
312 ngroups
= SCM_SIMPLE_VECTOR_LENGTH (group_vec
);
314 /* validate before allocating, so we don't have to worry about leaks */
315 for (i
= 0; i
< ngroups
; i
++)
317 unsigned long ulong_gid
;
319 SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
),
322 if (gid
!= ulong_gid
)
323 SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
326 size
= ngroups
* sizeof (GETGROUPS_T
);
327 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
328 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
329 groups
= scm_malloc (size
);
330 for(i
= 0; i
< ngroups
; i
++)
331 groups
[i
] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
333 result
= setgroups (ngroups
, groups
);
334 save_errno
= errno
; /* don't let free() touch errno */
339 return SCM_UNSPECIFIED
;
345 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
347 "Look up an entry in the user database. @var{obj} can be an integer,\n"
348 "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
349 "or getpwent respectively.")
350 #define FUNC_NAME s_scm_getpwuid
352 struct passwd
*entry
;
354 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
355 if (SCM_UNBNDP (user
) || scm_is_false (user
))
357 SCM_SYSCALL (entry
= getpwent ());
363 else if (scm_is_integer (user
))
365 entry
= getpwuid (scm_to_int (user
));
369 WITH_STRING (user
, c_user
,
370 entry
= getpwnam (c_user
));
373 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
375 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
376 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
377 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
378 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
379 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
381 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (""));
383 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
384 if (!entry
->pw_shell
)
385 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (""));
387 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
391 #endif /* HAVE_GETPWENT */
395 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
397 "If called with a true argument, initialize or reset the password data\n"
398 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
399 "@code{endpwent} procedures are implemented on top of this.")
400 #define FUNC_NAME s_scm_setpwent
402 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
406 return SCM_UNSPECIFIED
;
413 /* Combines getgrgid and getgrnam. */
414 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
416 "Look up an entry in the group database. @var{obj} can be an integer,\n"
417 "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
418 "or getgrent respectively.")
419 #define FUNC_NAME s_scm_getgrgid
422 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
424 if (SCM_UNBNDP (name
) || scm_is_false (name
))
426 SCM_SYSCALL (entry
= getgrent ());
432 else if (scm_is_integer (name
))
433 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
435 STRING_SYSCALL (name
, c_name
,
436 entry
= getgrnam (c_name
));
440 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
441 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
442 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
443 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
450 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
452 "If called with a true argument, initialize or reset the group data\n"
453 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
454 "@code{endgrent} procedures are implemented on top of this.")
455 #define FUNC_NAME s_scm_setgrent
457 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
461 return SCM_UNSPECIFIED
;
464 #endif /* HAVE_GETGRENT */
467 #ifdef HAVE_GETRLIMIT
469 SCM_SYMBOL (sym_as
, "as");
472 SCM_SYMBOL (sym_core
, "core");
475 SCM_SYMBOL (sym_cpu
, "cpu");
478 SCM_SYMBOL (sym_data
, "data");
481 SCM_SYMBOL (sym_fsize
, "fsize");
483 #ifdef RLIMIT_MEMLOCK
484 SCM_SYMBOL (sym_memlock
, "memlock");
486 #ifdef RLIMIT_MSGQUEUE
487 SCM_SYMBOL (sym_msgqueue
, "msgqueue");
490 SCM_SYMBOL (sym_nice
, "nice");
493 SCM_SYMBOL (sym_nofile
, "nofile");
496 SCM_SYMBOL (sym_nproc
, "nproc");
499 SCM_SYMBOL (sym_rss
, "rss");
502 SCM_SYMBOL (sym_rtprio
, "rtprio");
505 SCM_SYMBOL (sym_rttime
, "rttime");
507 #ifdef RLIMIT_SIGPENDING
508 SCM_SYMBOL (sym_sigpending
, "sigpending");
511 SCM_SYMBOL (sym_stack
, "stack");
515 scm_to_resource (SCM s
, const char *func
, int pos
)
517 if (scm_is_number (s
))
518 return scm_to_int (s
);
520 SCM_ASSERT_TYPE (scm_is_symbol (s
), s
, pos
, func
, "symbol");
542 #ifdef RLIMIT_MEMLOCK
543 if (s
== sym_memlock
)
544 return RLIMIT_MEMLOCK
;
546 #ifdef RLIMIT_MSGQUEUE
547 if (s
== sym_msgqueue
)
548 return RLIMIT_MSGQUEUE
;
556 return RLIMIT_NOFILE
;
568 return RLIMIT_RTPRIO
;
572 return RLIMIT_RTPRIO
;
574 #ifdef RLIMIT_SIGPENDING
575 if (s
== sym_sigpending
)
576 return RLIMIT_SIGPENDING
;
583 scm_misc_error (func
, "invalid rlimit resource ~A", scm_list_1 (s
));
587 SCM_DEFINE (scm_getrlimit
, "getrlimit", 1, 0, 0,
589 "Get a resource limit for this process. @var{resource} identifies the resource,\n"
590 "either as an integer or as a symbol. For example, @code{(getrlimit 'stack)}\n"
591 "gets the limits associated with @code{RLIMIT_STACK}.\n\n"
592 "@code{getrlimit} returns two values, the soft and the hard limit. If no\n"
593 "limit is set for the resource in question, the returned limit will be @code{#f}.")
594 #define FUNC_NAME s_scm_getrlimit
597 struct rlimit lim
= { 0, 0 };
599 iresource
= scm_to_resource (resource
, FUNC_NAME
, 1);
601 if (getrlimit (iresource
, &lim
) != 0)
602 scm_syserror (FUNC_NAME
);
604 return scm_values (scm_list_2 ((lim
.rlim_cur
== RLIM_INFINITY
) ? SCM_BOOL_F
605 : scm_from_long (lim
.rlim_cur
),
606 (lim
.rlim_max
== RLIM_INFINITY
) ? SCM_BOOL_F
607 : scm_from_long (lim
.rlim_max
)));
612 #ifdef HAVE_SETRLIMIT
613 SCM_DEFINE (scm_setrlimit
, "setrlimit", 3, 0, 0,
614 (SCM resource
, SCM soft
, SCM hard
),
615 "Set a resource limit for this process. @var{resource} identifies the resource,\n"
616 "either as an integer or as a symbol. @var{soft} and @var{hard} should be integers,\n"
617 "or @code{#f} to indicate no limit (i.e., @code{RLIM_INFINITY}).\n\n"
618 "For example, @code{(setrlimit 'stack 150000 300000)} sets the @code{RLIMIT_STACK}\n"
619 "limit to 150 kilobytes, with a hard limit of 300 kB.")
620 #define FUNC_NAME s_scm_setrlimit
623 struct rlimit lim
= { 0, 0 };
625 iresource
= scm_to_resource (resource
, FUNC_NAME
, 1);
627 lim
.rlim_cur
= (soft
== SCM_BOOL_F
) ? RLIM_INFINITY
: scm_to_long (soft
);
628 lim
.rlim_max
= (hard
== SCM_BOOL_F
) ? RLIM_INFINITY
: scm_to_long (hard
);
630 if (setrlimit (iresource
, &lim
) != 0)
631 scm_syserror (FUNC_NAME
);
633 return SCM_UNSPECIFIED
;
636 #endif /* HAVE_SETRLIMIT */
637 #endif /* HAVE_GETRLIMIT */
640 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
642 "Sends a signal to the specified process or group of processes.\n\n"
643 "@var{pid} specifies the processes to which the signal is sent:\n\n"
645 "@item @var{pid} greater than 0\n"
646 "The process whose identifier is @var{pid}.\n"
647 "@item @var{pid} equal to 0\n"
648 "All processes in the current process group.\n"
649 "@item @var{pid} less than -1\n"
650 "The process group whose identifier is -@var{pid}\n"
651 "@item @var{pid} equal to -1\n"
652 "If the process is privileged, all processes except for some special\n"
653 "system processes. Otherwise, all processes with the current effective\n"
656 "@var{sig} should be specified using a variable corresponding to\n"
657 "the Unix symbolic name, e.g.,\n\n"
662 "Interrupt signal.\n"
664 #define FUNC_NAME s_scm_kill
666 /* Signal values are interned in scm_init_posix(). */
668 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
671 /* Mingw has raise(), but not kill(). (Other raw DOS environments might
672 be similar.) Use raise() when the requested pid is our own process,
674 if (scm_to_int (pid
) == getpid ())
676 if (raise (scm_to_int (sig
)) != 0)
688 return SCM_UNSPECIFIED
;
693 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
694 (SCM pid
, SCM options
),
695 "This procedure collects status information from a child process which\n"
696 "has terminated or (optionally) stopped. Normally it will\n"
697 "suspend the calling process until this can be done. If more than one\n"
698 "child process is eligible then one will be chosen by the operating system.\n\n"
699 "The value of @var{pid} determines the behaviour:\n\n"
701 "@item @var{pid} greater than 0\n"
702 "Request status information from the specified child process.\n"
703 "@item @var{pid} equal to -1 or WAIT_ANY\n"
704 "Request status information for any child process.\n"
705 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
706 "Request status information for any child process in the current process\n"
708 "@item @var{pid} less than -1\n"
709 "Request status information for any child process whose process group ID\n"
712 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
713 "values of zero or more of the following variables:\n\n"
715 "Return immediately even if there are no child processes to be collected.\n"
717 "@defvar WUNTRACED\n"
718 "Report status information for stopped processes as well as terminated\n"
721 "The return value is a pair containing:\n\n"
724 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
725 "specified and no process was collected.\n"
727 "The integer status value.\n"
729 #define FUNC_NAME s_scm_waitpid
734 if (SCM_UNBNDP (options
))
738 /* Flags are interned in scm_init_posix. */
739 ioptions
= scm_to_int (options
);
741 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
744 return scm_cons (scm_from_int (i
), scm_from_int (status
));
747 #endif /* HAVE_WAITPID */
750 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
752 "Return the exit status value, as would be set if a process\n"
753 "ended normally through a call to @code{exit} or @code{_exit},\n"
754 "if any, otherwise @code{#f}.")
755 #define FUNC_NAME s_scm_status_exit_val
759 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
761 lstatus
= scm_to_int (status
);
762 if (WIFEXITED (lstatus
))
763 return (scm_from_int (WEXITSTATUS (lstatus
)));
769 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
771 "Return the signal number which terminated the process, if any,\n"
772 "otherwise @code{#f}.")
773 #define FUNC_NAME s_scm_status_term_sig
777 lstatus
= scm_to_int (status
);
778 if (WIFSIGNALED (lstatus
))
779 return scm_from_int (WTERMSIG (lstatus
));
785 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
787 "Return the signal number which stopped the process, if any,\n"
788 "otherwise @code{#f}.")
789 #define FUNC_NAME s_scm_status_stop_sig
793 lstatus
= scm_to_int (status
);
794 if (WIFSTOPPED (lstatus
))
795 return scm_from_int (WSTOPSIG (lstatus
));
800 #endif /* __MINGW32__ */
803 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
805 "Return an integer representing the process ID of the parent\n"
807 #define FUNC_NAME s_scm_getppid
809 return scm_from_int (getppid ());
812 #endif /* HAVE_GETPPID */
816 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
818 "Return an integer representing the current real user ID.")
819 #define FUNC_NAME s_scm_getuid
821 return scm_from_int (getuid ());
827 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
829 "Return an integer representing the current real group ID.")
830 #define FUNC_NAME s_scm_getgid
832 return scm_from_int (getgid ());
838 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
840 "Return an integer representing the current effective user ID.\n"
841 "If the system does not support effective IDs, then the real ID\n"
842 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
843 "system supports effective IDs.")
844 #define FUNC_NAME s_scm_geteuid
847 return scm_from_int (geteuid ());
849 return scm_from_int (getuid ());
855 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
857 "Return an integer representing the current effective group ID.\n"
858 "If the system does not support effective IDs, then the real ID\n"
859 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
860 "system supports effective IDs.")
861 #define FUNC_NAME s_scm_getegid
864 return scm_from_int (getegid ());
866 return scm_from_int (getgid ());
872 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
874 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
875 "the process has appropriate privileges.\n"
876 "The return value is unspecified.")
877 #define FUNC_NAME s_scm_setuid
879 if (setuid (scm_to_int (id
)) != 0)
881 return SCM_UNSPECIFIED
;
885 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
887 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
888 "the process has appropriate privileges.\n"
889 "The return value is unspecified.")
890 #define FUNC_NAME s_scm_setgid
892 if (setgid (scm_to_int (id
)) != 0)
894 return SCM_UNSPECIFIED
;
898 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
900 "Sets the effective user ID to the integer @var{id}, provided the process\n"
901 "has appropriate privileges. If effective IDs are not supported, the\n"
902 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
903 "system supports effective IDs.\n"
904 "The return value is unspecified.")
905 #define FUNC_NAME s_scm_seteuid
910 rv
= seteuid (scm_to_int (id
));
912 rv
= setuid (scm_to_int (id
));
916 return SCM_UNSPECIFIED
;
919 #endif /* __MINGW32__ */
923 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
925 "Sets the effective group ID to the integer @var{id}, provided the process\n"
926 "has appropriate privileges. If effective IDs are not supported, the\n"
927 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
928 "system supports effective IDs.\n"
929 "The return value is unspecified.")
930 #define FUNC_NAME s_scm_setegid
935 rv
= setegid (scm_to_int (id
));
937 rv
= setgid (scm_to_int (id
));
941 return SCM_UNSPECIFIED
;
949 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
951 "Return an integer representing the current process group ID.\n"
952 "This is the POSIX definition, not BSD.")
953 #define FUNC_NAME s_scm_getpgrp
956 fn
= (int (*) ()) getpgrp
;
957 return scm_from_int (fn (0));
960 #endif /* HAVE_GETPGRP */
964 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
966 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
967 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
969 "Fails on systems that do not support job control.\n"
970 "The return value is unspecified.")
971 #define FUNC_NAME s_scm_setpgid
973 /* FIXME(?): may be known as setpgrp. */
974 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
976 return SCM_UNSPECIFIED
;
979 #endif /* HAVE_SETPGID */
982 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
984 "Creates a new session. The current process becomes the session leader\n"
985 "and is put in a new process group. The process will be detached\n"
986 "from its controlling terminal if it has one.\n"
987 "The return value is an integer representing the new process group ID.")
988 #define FUNC_NAME s_scm_setsid
990 pid_t sid
= setsid ();
993 return SCM_UNSPECIFIED
;
996 #endif /* HAVE_SETSID */
999 /* ttyname returns its result in a single static buffer, hence
1000 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
1001 continuously calling ttyname will otherwise get an overwrite quite
1004 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
1005 there's probably little to be gained in either speed or parallelism. */
1008 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
1010 "Return a string with the name of the serial terminal device\n"
1011 "underlying @var{port}.")
1012 #define FUNC_NAME s_scm_ttyname
1016 SCM ret
= SCM_BOOL_F
;
1018 port
= SCM_COERCE_OUTPORT (port
);
1019 SCM_VALIDATE_OPPORT (1, port
);
1020 if (!SCM_FPORTP (port
))
1022 fd
= SCM_FPORT_FDES (port
);
1024 scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex
);
1026 SCM_SYSCALL (result
= ttyname (fd
));
1029 result
= strdup (result
);
1031 scm_i_pthread_mutex_unlock (&scm_i_misc_mutex
);
1039 ret
= scm_take_locale_string (result
);
1044 #endif /* HAVE_TTYNAME */
1047 /* For thread safety "buf" is used instead of NULL for the ctermid static
1048 buffer. Actually it's unlikely the controlling terminal will change
1049 during program execution, and indeed on glibc (2.3.2) it's always just
1050 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
1051 safety everywhere. */
1053 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
1055 "Return a string containing the file name of the controlling\n"
1056 "terminal for the current process.")
1057 #define FUNC_NAME s_scm_ctermid
1059 char buf
[L_ctermid
];
1060 char *result
= ctermid (buf
);
1061 if (*result
== '\0')
1063 return scm_from_locale_string (result
);
1066 #endif /* HAVE_CTERMID */
1068 #ifdef HAVE_TCGETPGRP
1069 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
1071 "Return the process group ID of the foreground process group\n"
1072 "associated with the terminal open on the file descriptor\n"
1073 "underlying @var{port}.\n"
1075 "If there is no foreground process group, the return value is a\n"
1076 "number greater than 1 that does not match the process group ID\n"
1077 "of any existing process group. This can happen if all of the\n"
1078 "processes in the job that was formerly the foreground job have\n"
1079 "terminated, and no other job has yet been moved into the\n"
1081 #define FUNC_NAME s_scm_tcgetpgrp
1086 port
= SCM_COERCE_OUTPORT (port
);
1088 SCM_VALIDATE_OPFPORT (1, port
);
1089 fd
= SCM_FPORT_FDES (port
);
1090 if ((pgid
= tcgetpgrp (fd
)) == -1)
1092 return scm_from_int (pgid
);
1095 #endif /* HAVE_TCGETPGRP */
1097 #ifdef HAVE_TCSETPGRP
1098 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
1099 (SCM port
, SCM pgid
),
1100 "Set the foreground process group ID for the terminal used by the file\n"
1101 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
1102 "The calling process\n"
1103 "must be a member of the same session as @var{pgid} and must have the same\n"
1104 "controlling terminal. The return value is unspecified.")
1105 #define FUNC_NAME s_scm_tcsetpgrp
1109 port
= SCM_COERCE_OUTPORT (port
);
1111 SCM_VALIDATE_OPFPORT (1, port
);
1112 fd
= SCM_FPORT_FDES (port
);
1113 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
1115 return SCM_UNSPECIFIED
;
1118 #endif /* HAVE_TCSETPGRP */
1121 free_string_pointers (void *data
)
1123 scm_i_free_string_pointers ((char **)data
);
1126 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
1127 (SCM filename
, SCM args
),
1128 "Executes the file named by @var{path} as a new process image.\n"
1129 "The remaining arguments are supplied to the process; from a C program\n"
1130 "they are accessible as the @code{argv} argument to @code{main}.\n"
1131 "Conventionally the first @var{arg} is the same as @var{path}.\n"
1132 "All arguments must be strings.\n\n"
1133 "If @var{arg} is missing, @var{path} is executed with a null\n"
1134 "argument list, which may have system-dependent side-effects.\n\n"
1135 "This procedure is currently implemented using the @code{execv} system\n"
1136 "call, but we call it @code{execl} because of its Scheme calling interface.")
1137 #define FUNC_NAME s_scm_execl
1142 scm_dynwind_begin (0);
1144 exec_file
= scm_to_locale_string (filename
);
1145 scm_dynwind_free (exec_file
);
1147 exec_argv
= scm_i_allocate_string_pointers (args
);
1148 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
1149 SCM_F_WIND_EXPLICITLY
);
1153 /* extra "const" in mingw formals, provokes warning from gcc */
1154 (const char * const *)
1165 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
1166 (SCM filename
, SCM args
),
1167 "Similar to @code{execl}, however if\n"
1168 "@var{filename} does not contain a slash\n"
1169 "then the file to execute will be located by searching the\n"
1170 "directories listed in the @code{PATH} environment variable.\n\n"
1171 "This procedure is currently implemented using the @code{execvp} system\n"
1172 "call, but we call it @code{execlp} because of its Scheme calling interface.")
1173 #define FUNC_NAME s_scm_execlp
1178 scm_dynwind_begin (0);
1180 exec_file
= scm_to_locale_string (filename
);
1181 scm_dynwind_free (exec_file
);
1183 exec_argv
= scm_i_allocate_string_pointers (args
);
1184 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
1185 SCM_F_WIND_EXPLICITLY
);
1189 /* extra "const" in mingw formals, provokes warning from gcc */
1190 (const char * const *)
1202 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
1203 list strings the way environ_list_to_c gives. */
1205 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
1206 (SCM filename
, SCM env
, SCM args
),
1207 "Similar to @code{execl}, but the environment of the new process is\n"
1208 "specified by @var{env}, which must be a list of strings as returned by the\n"
1209 "@code{environ} procedure.\n\n"
1210 "This procedure is currently implemented using the @code{execve} system\n"
1211 "call, but we call it @code{execle} because of its Scheme calling interface.")
1212 #define FUNC_NAME s_scm_execle
1218 scm_dynwind_begin (0);
1220 exec_file
= scm_to_locale_string (filename
);
1221 scm_dynwind_free (exec_file
);
1223 exec_argv
= scm_i_allocate_string_pointers (args
);
1224 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
1225 SCM_F_WIND_EXPLICITLY
);
1227 exec_env
= scm_i_allocate_string_pointers (env
);
1228 scm_dynwind_unwind_handler (free_string_pointers
, exec_env
,
1229 SCM_F_WIND_EXPLICITLY
);
1233 /* extra "const" in mingw formals, provokes warning from gcc */
1234 (const char * const *)
1238 /* extra "const" in mingw formals, provokes warning from gcc */
1239 (const char * const *)
1251 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1253 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1254 "In the child the return value is 0. In the parent the return value is\n"
1255 "the integer process ID of the child.\n\n"
1256 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1257 "with the scsh fork.")
1258 #define FUNC_NAME s_scm_fork
1264 return scm_from_int (pid
);
1267 #endif /* HAVE_FORK */
1270 # include "win32-uname.h"
1273 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1274 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1276 "Return an object with some information about the computer\n"
1277 "system the program is running on.")
1278 #define FUNC_NAME s_scm_uname
1281 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1282 if (uname (&buf
) < 0)
1284 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1285 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1286 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1287 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1288 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1291 SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1296 #endif /* HAVE_UNAME */
1298 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1300 "If @var{env} is omitted, return the current environment (in the\n"
1301 "Unix sense) as a list of strings. Otherwise set the current\n"
1302 "environment, which is also the default environment for child\n"
1303 "processes, to the supplied list of strings. Each member of\n"
1304 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1305 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1306 "then the return value is unspecified.")
1307 #define FUNC_NAME s_scm_environ
1309 if (SCM_UNBNDP (env
))
1310 return scm_makfromstrs (-1, environ
);
1315 new_environ
= scm_i_allocate_string_pointers (env
);
1316 /* Free the old environment, except when called for the first
1320 static int first
= 1;
1322 scm_i_free_string_pointers (environ
);
1325 environ
= new_environ
;
1326 return SCM_UNSPECIFIED
;
1333 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1335 "Return a name in the file system that does not match any\n"
1336 "existing file. However there is no guarantee that another\n"
1337 "process will not create the file after @code{tmpnam} is called.\n"
1338 "Care should be taken if opening the file, e.g., use the\n"
1339 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1340 #define FUNC_NAME s_scm_tmpnam
1342 char name
[L_tmpnam
];
1345 SCM_SYSCALL (rv
= tmpnam (name
));
1347 /* not SCM_SYSERROR since errno probably not set. */
1348 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1349 return scm_from_locale_string (name
);
1355 #ifndef HAVE_MKSTEMP
1356 extern int mkstemp (char *);
1359 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1361 "Create a new unique file in the file system and return a new\n"
1362 "buffered port open for reading and writing to the file.\n"
1364 "@var{tmpl} is a string specifying where the file should be\n"
1365 "created: it must end with @samp{XXXXXX} and those @samp{X}s\n"
1366 "will be changed in the string to return the name of the file.\n"
1367 "(@code{port-filename} on the port also gives the name.)\n"
1369 "POSIX doesn't specify the permissions mode of the file, on GNU\n"
1370 "and most systems it's @code{#o600}. An application can use\n"
1371 "@code{chmod} to relax that if desired. For example\n"
1372 "@code{#o666} less @code{umask}, which is usual for ordinary\n"
1376 "(let ((port (mkstemp! (string-copy \"/tmp/myfile-XXXXXX\"))))\n"
1377 " (chmod port (logand #o666 (lognot (umask))))\n"
1380 #define FUNC_NAME s_scm_mkstemp
1385 scm_dynwind_begin (0);
1387 c_tmpl
= scm_to_locale_string (tmpl
);
1388 scm_dynwind_free (c_tmpl
);
1390 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1394 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1395 SCM_INUM0
, scm_string_length (tmpl
),
1399 return scm_fdes_to_port (rv
, "w+", tmpl
);
1403 SCM_DEFINE (scm_utime
, "utime", 1, 2, 0,
1404 (SCM pathname
, SCM actime
, SCM modtime
),
1405 "@code{utime} sets the access and modification times for the\n"
1406 "file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1407 "not supplied, then the current time is used. @var{actime} and\n"
1408 "@var{modtime} must be integer time values as returned by the\n"
1409 "@code{current-time} procedure.\n"
1411 "(utime \"foo\" (- (current-time) 3600))\n"
1413 "will set the access time to one hour in the past and the\n"
1414 "modification time to the current time.")
1415 #define FUNC_NAME s_scm_utime
1418 struct utimbuf utm_tmp
;
1420 if (SCM_UNBNDP (actime
))
1421 SCM_SYSCALL (time (&utm_tmp
.actime
));
1423 utm_tmp
.actime
= SCM_NUM2ULONG (2, actime
);
1425 if (SCM_UNBNDP (modtime
))
1426 SCM_SYSCALL (time (&utm_tmp
.modtime
));
1428 utm_tmp
.modtime
= SCM_NUM2ULONG (3, modtime
);
1430 STRING_SYSCALL (pathname
, c_pathname
,
1431 rv
= utime (c_pathname
, &utm_tmp
));
1434 return SCM_UNSPECIFIED
;
1438 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1439 (SCM path
, SCM how
),
1440 "Test accessibility of a file under the real UID and GID of the\n"
1441 "calling process. The return is @code{#t} if @var{path} exists\n"
1442 "and the permissions requested by @var{how} are all allowed, or\n"
1443 "@code{#f} if not.\n"
1445 "@var{how} is an integer which is one of the following values,\n"
1446 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1449 "Test for read permission.\n"
1452 "Test for write permission.\n"
1455 "Test for execute permission.\n"
1458 "Test for existence of the file. This is implied by each of the\n"
1459 "other tests, so there's no need to combine it with them.\n"
1462 "It's important to note that @code{access?} does not simply\n"
1463 "indicate what will happen on attempting to read or write a\n"
1464 "file. In normal circumstances it does, but in a set-UID or\n"
1465 "set-GID program it doesn't because @code{access?} tests the\n"
1466 "real ID, whereas an open or execute attempt uses the effective\n"
1469 "A program which will never run set-UID/GID can ignore the\n"
1470 "difference between real and effective IDs, but for maximum\n"
1471 "generality, especially in library functions, it's best not to\n"
1472 "use @code{access?} to predict the result of an open or execute,\n"
1473 "instead simply attempt that and catch any exception.\n"
1475 "The main use for @code{access?} is to let a set-UID/GID program\n"
1476 "determine what the invoking user would have been allowed to do,\n"
1477 "without the greater (or perhaps lesser) privileges afforded by\n"
1478 "the effective ID. For more on this, see ``Testing File\n"
1479 "Access'' in The GNU C Library Reference Manual.")
1480 #define FUNC_NAME s_scm_access
1484 WITH_STRING (path
, c_path
,
1485 rv
= access (c_path
, scm_to_int (how
)));
1486 return scm_from_bool (!rv
);
1490 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1492 "Return an integer representing the current process ID.")
1493 #define FUNC_NAME s_scm_getpid
1495 return scm_from_ulong (getpid ());
1499 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1501 "Modifies the environment of the current process, which is\n"
1502 "also the default environment inherited by child processes.\n\n"
1503 "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1504 "directly into the environment, replacing any existing environment string\n"
1506 "name matching @code{NAME}. If @var{string} does not contain an equal\n"
1507 "sign, then any existing string with name matching @var{string} will\n"
1509 "The return value is unspecified.")
1510 #define FUNC_NAME s_scm_putenv
1513 char *c_str
= scm_to_locale_string (str
);
1515 if (strchr (c_str
, '=') == NULL
)
1517 /* We want no "=" in the argument to mean remove the variable from the
1518 environment, but not all putenv()s understand this, for example
1519 FreeBSD 4.8 doesn't. Getting it happening everywhere is a bit
1520 painful. What unsetenv() exists, we use that, of course.
1522 Traditionally putenv("NAME") removes a variable, for example that's
1523 what we have to do on Solaris 9 (it doesn't have an unsetenv).
1525 But on DOS and on that DOS overlay manager thing called W-whatever,
1526 putenv("NAME=") must be used (it too doesn't have an unsetenv).
1528 Supposedly on AIX a putenv("NAME") could cause a segfault, but also
1529 supposedly AIX 5.3 and up has unsetenv() available so should be ok
1530 with the latter there.
1532 For the moment we hard code the DOS putenv("NAME=") style under
1533 __MINGW32__ and do the traditional everywhere else. Such
1534 system-name tests are bad, of course. It'd be possible to use a
1535 configure test when doing a a native build. For example GNU R has
1536 such a test (see R_PUTENV_AS_UNSETENV in
1537 https://svn.r-project.org/R/trunk/m4/R.m4). But when cross
1538 compiling there'd want to be a guess, one probably based on the
1539 system name (ie. mingw or not), thus landing back in basically the
1540 present hard-coded situation. Another possibility for a cross
1541 build would be to try "NAME" then "NAME=" at runtime, if that's not
1542 too much like overkill. */
1545 /* when unsetenv() exists then we use it */
1548 #elif defined (__MINGW32__)
1549 /* otherwise putenv("NAME=") on DOS */
1551 size_t len
= strlen (c_str
);
1552 char *ptr
= scm_malloc (len
+ 2);
1553 strcpy (ptr
, c_str
);
1554 strcpy (ptr
+len
, "=");
1556 e
= errno
; free (ptr
); free (c_str
); errno
= e
;
1560 /* otherwise traditional putenv("NAME") */
1561 rv
= putenv (c_str
);
1569 /* If str is "FOO=", ie. attempting to set an empty string, then
1570 we need to see if it's been successful. On MINGW, "FOO="
1571 means remove FOO from the environment. As a workaround, we
1572 set "FOO= ", ie. a space, and then modify the string returned
1573 by getenv. It's not enough just to modify the string we set,
1574 because MINGW putenv copies it. */
1577 size_t len
= strlen (c_str
);
1578 if (c_str
[len
-1] == '=')
1580 char *ptr
= scm_malloc (len
+2);
1581 strcpy (ptr
, c_str
);
1582 strcpy (ptr
+len
, " ");
1591 /* truncate to just the name */
1592 c_str
[len
-1] = '\0';
1593 ptr
= getenv (c_str
);
1596 return SCM_UNSPECIFIED
;
1599 #endif /* __MINGW32__ */
1601 /* Leave c_str in the environment. */
1603 rv
= putenv (c_str
);
1607 return SCM_UNSPECIFIED
;
1611 /* This mutex is used to serialize invocations of `setlocale ()' on non-GNU
1612 systems (i.e., systems where a reentrant locale API is not available). It
1613 is also acquired before calls to `nl_langinfo ()'. See `i18n.c' for
1615 scm_i_pthread_mutex_t scm_i_locale_mutex
= SCM_I_PTHREAD_MUTEX_INITIALIZER
;
1617 #ifdef HAVE_SETLOCALE
1619 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1620 (SCM category
, SCM locale
),
1621 "If @var{locale} is omitted, return the current value of the\n"
1622 "specified locale category as a system-dependent string.\n"
1623 "@var{category} should be specified using the values\n"
1624 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1626 "Otherwise the specified locale category is set to the string\n"
1627 "@var{locale} and the new value is returned as a\n"
1628 "system-dependent string. If @var{locale} is an empty string,\n"
1629 "the locale will be set using environment variables.")
1630 #define FUNC_NAME s_scm_setlocale
1636 scm_dynwind_begin (0);
1638 if (SCM_UNBNDP (locale
))
1644 clocale
= scm_to_locale_string (locale
);
1645 scm_dynwind_free (clocale
);
1648 c_category
= scm_i_to_lc_category (category
, 1);
1650 scm_i_pthread_mutex_lock (&scm_i_locale_mutex
);
1651 rv
= setlocale (c_category
, clocale
);
1652 scm_i_pthread_mutex_unlock (&scm_i_locale_mutex
);
1656 /* POSIX and C99 don't say anything about setlocale setting errno, so
1657 force a sensible value here. glibc leaves ENOENT, which would be
1658 fine, but it's not a documented feature. */
1663 /* Recompute the standard SRFI-14 character sets in a locale-dependent
1664 (actually charset-dependent) way. */
1665 scm_srfi_14_compute_char_sets ();
1668 return scm_from_locale_string (rv
);
1671 #endif /* HAVE_SETLOCALE */
1674 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1675 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1676 "Creates a new special file, such as a file corresponding to a device.\n"
1677 "@var{path} specifies the name of the file. @var{type} should\n"
1678 "be one of the following symbols:\n"
1679 "regular, directory, symlink, block-special, char-special,\n"
1680 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1681 "@var{dev} (an integer) specifies which device the special file refers\n"
1682 "to. Its exact interpretation depends on the kind of special file\n"
1683 "being created.\n\n"
1686 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1688 "The return value is unspecified.")
1689 #define FUNC_NAME s_scm_mknod
1695 SCM_VALIDATE_STRING (1, path
);
1696 SCM_VALIDATE_SYMBOL (2, type
);
1698 p
= scm_i_symbol_chars (type
);
1699 if (strcmp (p
, "regular") == 0)
1701 else if (strcmp (p
, "directory") == 0)
1704 /* systems without symlinks probably don't have S_IFLNK defined */
1705 else if (strcmp (p
, "symlink") == 0)
1708 else if (strcmp (p
, "block-special") == 0)
1710 else if (strcmp (p
, "char-special") == 0)
1712 else if (strcmp (p
, "fifo") == 0)
1715 else if (strcmp (p
, "socket") == 0)
1719 SCM_OUT_OF_RANGE (2, type
);
1721 STRING_SYSCALL (path
, c_path
,
1722 val
= mknod (c_path
,
1723 ctype
| scm_to_int (perms
),
1727 return SCM_UNSPECIFIED
;
1730 #endif /* HAVE_MKNOD */
1733 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1735 "Increment the priority of the current process by @var{incr}. A higher\n"
1736 "priority value means that the process runs less often.\n"
1737 "The return value is unspecified.")
1738 #define FUNC_NAME s_scm_nice
1742 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1743 from "prio-NZERO", so an error must be detected from errno changed */
1745 nice_value
= nice (scm_to_int (incr
));
1749 return SCM_UNSPECIFIED
;
1752 #endif /* HAVE_NICE */
1755 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1757 "Flush the operating system disk buffers.\n"
1758 "The return value is unspecified.")
1759 #define FUNC_NAME s_scm_sync
1762 return SCM_UNSPECIFIED
;
1765 #endif /* HAVE_SYNC */
1768 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1769 to avoid another thread overwriting it. A test program running crypt
1770 continuously in two threads can be quickly seen tripping this problem.
1771 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1773 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1774 slower (about 5x) than plain crypt if you pass an uninitialized data
1775 block each time. Presumably there's some one-time setups. The best way
1776 to use crypt_r for parallel execution in multiple threads would probably
1777 be to maintain a little pool of initialized crypt_data structures, take
1778 one and use it, then return it to the pool. That pool could be garbage
1779 collected so it didn't add permanently to memory use if only a few crypt
1780 calls are made. But we expect crypt will be used rarely, and even more
1781 rarely will there be any desire for lots of parallel execution on
1782 multiple cpus. So for now we don't bother with anything fancy, just
1786 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1787 (SCM key
, SCM salt
),
1788 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1789 "crypt(3) library call.")
1790 #define FUNC_NAME s_scm_crypt
1793 char *c_key
, *c_salt
, *c_ret
;
1795 scm_dynwind_begin (0);
1796 scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex
);
1798 c_key
= scm_to_locale_string (key
);
1799 scm_dynwind_free (c_key
);
1800 c_salt
= scm_to_locale_string (salt
);
1801 scm_dynwind_free (c_salt
);
1803 /* The Linux crypt(3) man page says crypt will return NULL and set errno
1804 on error. (Eg. ENOSYS if legal restrictions mean it cannot be
1806 c_ret
= crypt (c_key
, c_salt
);
1810 ret
= scm_from_locale_string (c_ret
);
1815 #endif /* HAVE_CRYPT */
1818 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1820 "Change the root directory to that specified in @var{path}.\n"
1821 "This directory will be used for path names beginning with\n"
1822 "@file{/}. The root directory is inherited by all children\n"
1823 "of the current process. Only the superuser may change the\n"
1825 #define FUNC_NAME s_scm_chroot
1829 WITH_STRING (path
, c_path
,
1830 rv
= chroot (c_path
));
1833 return SCM_UNSPECIFIED
;
1836 #endif /* HAVE_CHROOT */
1840 /* Wrapper function to supplying `getlogin()' under Windows. */
1841 static char * getlogin (void)
1843 static char user
[256];
1844 static unsigned long len
= 256;
1846 if (!GetUserName (user
, &len
))
1850 #endif /* __MINGW32__ */
1853 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1854 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1856 "Return a string containing the name of the user logged in on\n"
1857 "the controlling terminal of the process, or @code{#f} if this\n"
1858 "information cannot be obtained.")
1859 #define FUNC_NAME s_scm_getlogin
1866 return scm_from_locale_string (p
);
1869 #endif /* HAVE_GETLOGIN */
1872 SCM_DEFINE (scm_cuserid
, "cuserid", 0, 0, 0,
1874 "Return a string containing a user name associated with the\n"
1875 "effective user id of the process. Return @code{#f} if this\n"
1876 "information cannot be obtained.")
1877 #define FUNC_NAME s_scm_cuserid
1879 char buf
[L_cuserid
];
1885 return scm_from_locale_string (p
);
1888 #endif /* HAVE_CUSERID */
1890 #if HAVE_GETPRIORITY
1891 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1892 (SCM which
, SCM who
),
1893 "Return the scheduling priority of the process, process group\n"
1894 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1895 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1896 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1897 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1898 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1899 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1900 "denotes the current process, process group, or user. Return\n"
1901 "the highest priority (lowest numerical value) of any of the\n"
1902 "specified processes.")
1903 #define FUNC_NAME s_scm_getpriority
1905 int cwhich
, cwho
, ret
;
1907 cwhich
= scm_to_int (which
);
1908 cwho
= scm_to_int (who
);
1910 /* We have to clear errno and examine it later, because -1 is a
1911 legal return value for getpriority(). */
1913 ret
= getpriority (cwhich
, cwho
);
1916 return scm_from_int (ret
);
1919 #endif /* HAVE_GETPRIORITY */
1921 #if HAVE_SETPRIORITY
1922 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1923 (SCM which
, SCM who
, SCM prio
),
1924 "Set the scheduling priority of the process, process group\n"
1925 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1926 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1927 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1928 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1929 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1930 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1931 "denotes the current process, process group, or user.\n"
1932 "@var{prio} is a value in the range -20 and 20, the default\n"
1933 "priority is 0; lower priorities cause more favorable\n"
1934 "scheduling. Sets the priority of all of the specified\n"
1935 "processes. Only the super-user may lower priorities.\n"
1936 "The return value is not specified.")
1937 #define FUNC_NAME s_scm_setpriority
1939 int cwhich
, cwho
, cprio
;
1941 cwhich
= scm_to_int (which
);
1942 cwho
= scm_to_int (who
);
1943 cprio
= scm_to_int (prio
);
1945 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1947 return SCM_UNSPECIFIED
;
1950 #endif /* HAVE_SETPRIORITY */
1953 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
1955 "Display @var{prompt} to the standard error output and read\n"
1956 "a password from @file{/dev/tty}. If this file is not\n"
1957 "accessible, it reads from standard input. The password may be\n"
1958 "up to 127 characters in length. Additional characters and the\n"
1959 "terminating newline character are discarded. While reading\n"
1960 "the password, echoing and the generation of signals by special\n"
1961 "characters is disabled.")
1962 #define FUNC_NAME s_scm_getpass
1967 SCM_VALIDATE_STRING (1, prompt
);
1969 WITH_STRING (prompt
, c_prompt
,
1970 p
= getpass(c_prompt
));
1971 passwd
= scm_from_locale_string (p
);
1973 /* Clear out the password in the static buffer. */
1974 memset (p
, 0, strlen (p
));
1979 #endif /* HAVE_GETPASS */
1981 /* Wrapper function for flock() support under M$-Windows. */
1984 # include <sys/locking.h>
1987 /* Current MinGW package fails to define this. *sigh* */
1988 # define _LK_UNLCK 0
1995 static int flock (int fd
, int operation
)
2000 /* Disable invalid arguments. */
2001 if (((operation
& (LOCK_EX
| LOCK_SH
)) == (LOCK_EX
| LOCK_SH
)) ||
2002 ((operation
& (LOCK_EX
| LOCK_UN
)) == (LOCK_EX
| LOCK_UN
)) ||
2003 ((operation
& (LOCK_SH
| LOCK_UN
)) == (LOCK_SH
| LOCK_UN
)))
2009 /* Determine mode of operation and discard unsupported ones. */
2010 if (operation
== (LOCK_NB
| LOCK_EX
))
2011 operation
= _LK_NBLCK
;
2012 else if (operation
& LOCK_UN
)
2013 operation
= _LK_UNLCK
;
2014 else if (operation
== LOCK_EX
)
2015 operation
= _LK_LOCK
;
2022 /* Save current file pointer and seek to beginning. */
2023 if ((pos
= lseek (fd
, 0, SEEK_CUR
)) == -1 || (len
= filelength (fd
)) == -1)
2025 lseek (fd
, 0L, SEEK_SET
);
2027 /* Deadlock if necessary. */
2030 ret
= _locking (fd
, operation
, len
);
2032 while (ret
== -1 && errno
== EDEADLOCK
);
2034 /* Produce meaningful error message. */
2035 if (errno
== EACCES
&& operation
== _LK_NBLCK
)
2040 /* Return to saved file position pointer. */
2041 lseek (fd
, pos
, SEEK_SET
);
2045 #endif /* __MINGW32__ */
2047 #if HAVE_FLOCK || defined (__MINGW32__)
2048 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
2049 (SCM file
, SCM operation
),
2050 "Apply or remove an advisory lock on an open file.\n"
2051 "@var{operation} specifies the action to be done:\n"
2054 "Shared lock. More than one process may hold a shared lock\n"
2055 "for a given file at a given time.\n"
2058 "Exclusive lock. Only one process may hold an exclusive lock\n"
2059 "for a given file at a given time.\n"
2062 "Unlock the file.\n"
2065 "Don't block when locking. This is combined with one of the\n"
2066 "other operations using @code{logior}. If @code{flock} would\n"
2067 "block an @code{EWOULDBLOCK} error is thrown.\n"
2070 "The return value is not specified. @var{file} may be an open\n"
2071 "file descriptor or an open file descriptor port.\n"
2073 "Note that @code{flock} does not lock files across NFS.")
2074 #define FUNC_NAME s_scm_flock
2078 if (scm_is_integer (file
))
2079 fdes
= scm_to_int (file
);
2082 SCM_VALIDATE_OPFPORT (2, file
);
2084 fdes
= SCM_FPORT_FDES (file
);
2086 if (flock (fdes
, scm_to_int (operation
)) == -1)
2088 return SCM_UNSPECIFIED
;
2091 #endif /* HAVE_FLOCK */
2093 #if HAVE_SETHOSTNAME
2094 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
2096 "Set the host name of the current processor to @var{name}. May\n"
2097 "only be used by the superuser. The return value is not\n"
2099 #define FUNC_NAME s_scm_sethostname
2103 WITH_STRING (name
, c_name
,
2104 rv
= sethostname (c_name
, strlen(c_name
)));
2107 return SCM_UNSPECIFIED
;
2110 #endif /* HAVE_SETHOSTNAME */
2113 #if HAVE_GETHOSTNAME
2114 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
2116 "Return the host name of the current processor.")
2117 #define FUNC_NAME s_scm_gethostname
2119 #ifdef MAXHOSTNAMELEN
2121 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
2122 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
2123 const int len
= MAXHOSTNAMELEN
+ 1;
2124 char *const p
= scm_malloc (len
);
2125 const int res
= gethostname (p
, len
);
2127 scm_dynwind_begin (0);
2128 scm_dynwind_unwind_handler (free
, p
, 0);
2132 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
2133 * large enough. SUSv2 specifies 255 maximum too, apparently. */
2138 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
2140 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
2141 * which may reflect a particular kernel configuration.
2142 * Must watch out for this existing but giving -1, as happens for instance
2143 * in gnu/linux glibc 2.3.2. */
2145 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
2152 p
= scm_malloc (len
);
2154 scm_dynwind_begin (0);
2155 scm_dynwind_unwind_handler (free
, p
, 0);
2157 res
= gethostname (p
, len
);
2158 while (res
== -1 && errno
== ENAMETOOLONG
)
2162 /* scm_realloc may throw an exception. */
2163 p
= scm_realloc (p
, len
);
2164 res
= gethostname (p
, len
);
2171 const int save_errno
= errno
;
2173 /* No guile exceptions can occur before we have freed p's memory. */
2182 /* scm_from_locale_string may throw an exception. */
2183 const SCM name
= scm_from_locale_string (p
);
2185 /* No guile exceptions can occur before we have freed p's memory. */
2193 #endif /* HAVE_GETHOSTNAME */
2199 scm_add_feature ("posix");
2201 scm_add_feature ("EIDs");
2204 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
2207 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
2210 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
2213 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
2216 /* access() symbols. */
2217 scm_c_define ("R_OK", scm_from_int (R_OK
));
2218 scm_c_define ("W_OK", scm_from_int (W_OK
));
2219 scm_c_define ("X_OK", scm_from_int (X_OK
));
2220 scm_c_define ("F_OK", scm_from_int (F_OK
));
2223 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
2226 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
2229 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
2232 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
2235 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
2238 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
2241 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
2244 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
2247 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
2250 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
2253 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
2255 #ifdef LC_MEASUREMENT
2256 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
2258 #ifdef LC_IDENTIFICATION
2259 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
2262 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
2266 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
2269 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
2272 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
2276 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
2279 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
2282 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
2285 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
2288 #include "libguile/cpp_sig_symbols.c"
2289 #include "libguile/posix.x"