1 /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2 * 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public License
6 * as published by the Free Software Foundation; either version 3 of
7 * the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
38 #ifdef TIME_WITH_SYS_TIME
39 # include <sys/time.h>
43 # include <sys/time.h>
53 #ifdef LIBC_H_WITH_UNISTD_H
57 #include <sys/types.h>
68 #include "libguile/_scm.h"
69 #include "libguile/dynwind.h"
70 #include "libguile/fports.h"
71 #include "libguile/scmsigs.h"
72 #include "libguile/feature.h"
73 #include "libguile/strings.h"
74 #include "libguile/srfi-13.h"
75 #include "libguile/srfi-14.h"
76 #include "libguile/vectors.h"
77 #include "libguile/values.h"
79 #include "libguile/validate.h"
80 #include "libguile/posix.h"
81 #include "libguile/gettext.h"
82 #include "libguile/threads.h"
86 # include <sys/wait.h>
89 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
92 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
100 #ifdef HAVE_SYS_UTSNAME_H
101 #include <sys/utsname.h>
104 #ifdef HAVE_SETLOCALE
108 #if (defined HAVE_NEWLOCALE) && (defined HAVE_STRCOLL_L)
109 # define USE_GNU_LOCALE_API
112 #if (defined USE_GNU_LOCALE_API) && (defined HAVE_XLOCALE_H)
113 # include <xlocale.h>
121 #include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
124 #ifdef HAVE_SYS_PARAM_H
125 #include <sys/param.h> /* for MAXHOSTNAMELEN */
128 #if HAVE_SYS_RESOURCE_H
129 # include <sys/resource.h>
132 #include <sys/file.h> /* from Gnulib */
134 /* Some Unix systems don't define these. CPP hair is dangerous, but
135 this seems safe enough... */
152 /* No prototype for this on Solaris 10. The man page says it's in
153 <unistd.h> ... but it lies. */
154 #if ! HAVE_DECL_SETHOSTNAME
155 int sethostname (char *name
, size_t namelen
);
158 /* On NextStep, <utime.h> doesn't define struct utime, unless we
159 #define _POSIX_SOURCE before #including it. I think this is less
160 of a kludge than defining struct utimbuf ourselves. */
161 #ifdef UTIMBUF_NEEDS_POSIX
162 #define _POSIX_SOURCE
165 #ifdef HAVE_SYS_UTIME_H
166 #include <sys/utime.h>
173 /* Please don't add any more #includes or #defines here. The hack
174 above means that _POSIX_SOURCE may be #defined, which will
175 encourage header files to do strange things.
177 FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
179 FIXME: Probably should do all the includes first, then all the fallback
180 declarations and defines, in case things are not in the header we
188 /* Two often used patterns
191 #define WITH_STRING(str,cstr,code) \
193 char *cstr = scm_to_locale_string (str); \
198 #define STRING_SYSCALL(str,cstr,code) \
201 char *cstr = scm_to_locale_string (str); \
202 SCM_SYSCALL (code); \
203 eno = errno; free (cstr); errno = eno; \
208 SCM_SYMBOL (sym_read_pipe
, "read pipe");
209 SCM_SYMBOL (sym_write_pipe
, "write pipe");
211 SCM_DEFINE (scm_pipe
, "pipe", 0, 0, 0,
213 "Return a newly created pipe: a pair of ports which are linked\n"
214 "together on the local machine. The @emph{car} is the input\n"
215 "port and the @emph{cdr} is the output port. Data written (and\n"
216 "flushed) to the output port can be read from the input port.\n"
217 "Pipes are commonly used for communication with a newly forked\n"
218 "child process. The need to flush the output port can be\n"
219 "avoided by making it unbuffered using @code{setvbuf}.\n"
221 "Writes occur atomically provided the size of the data in bytes\n"
222 "is not greater than the value of @code{PIPE_BUF}. Note that\n"
223 "the output port is likely to block if too much data (typically\n"
224 "equal to @code{PIPE_BUF}) has been written but not yet read\n"
225 "from the input port.")
226 #define FUNC_NAME s_scm_pipe
235 p_rd
= scm_fdes_to_port (fd
[0], "r", sym_read_pipe
);
236 p_wt
= scm_fdes_to_port (fd
[1], "w", sym_write_pipe
);
237 return scm_cons (p_rd
, p_wt
);
242 #ifdef HAVE_GETGROUPS
243 SCM_DEFINE (scm_getgroups
, "getgroups", 0, 0, 0,
245 "Return a vector of integers representing the current\n"
246 "supplementary group IDs.")
247 #define FUNC_NAME s_scm_getgroups
254 ngroups
= getgroups (0, NULL
);
257 else if (ngroups
== 0)
258 return scm_c_make_vector (0, SCM_BOOL_F
);
260 size
= ngroups
* sizeof (GETGROUPS_T
);
261 groups
= scm_malloc (size
);
262 ngroups
= getgroups (ngroups
, groups
);
264 result
= scm_c_make_vector (ngroups
, SCM_BOOL_F
);
265 while (--ngroups
>= 0)
266 SCM_SIMPLE_VECTOR_SET (result
, ngroups
, scm_from_ulong (groups
[ngroups
]));
274 #ifdef HAVE_SETGROUPS
275 SCM_DEFINE (scm_setgroups
, "setgroups", 1, 0, 0,
277 "Set the current set of supplementary group IDs to the integers\n"
278 "in the given vector @var{group_vec}. The return value is\n"
281 "Generally only the superuser can set the process group IDs.")
282 #define FUNC_NAME s_scm_setgroups
291 SCM_VALIDATE_VECTOR (SCM_ARG1
, group_vec
);
293 ngroups
= SCM_SIMPLE_VECTOR_LENGTH (group_vec
);
295 /* validate before allocating, so we don't have to worry about leaks */
296 for (i
= 0; i
< ngroups
; i
++)
298 unsigned long ulong_gid
;
300 SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
),
303 if (gid
!= ulong_gid
)
304 SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
307 size
= ngroups
* sizeof (GETGROUPS_T
);
308 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
309 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
310 groups
= scm_malloc (size
);
311 for(i
= 0; i
< ngroups
; i
++)
312 groups
[i
] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
314 result
= setgroups (ngroups
, groups
);
315 save_errno
= errno
; /* don't let free() touch errno */
320 return SCM_UNSPECIFIED
;
326 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
328 "Look up an entry in the user database. @var{user} can be an\n"
329 "integer, a string, or omitted, giving the behaviour of\n"
330 "@code{getpwuid}, @code{getpwnam} or @code{getpwent}\n"
332 #define FUNC_NAME s_scm_getpwuid
334 struct passwd
*entry
;
336 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
337 if (SCM_UNBNDP (user
) || scm_is_false (user
))
339 SCM_SYSCALL (entry
= getpwent ());
345 else if (scm_is_integer (user
))
347 entry
= getpwuid (scm_to_int (user
));
351 WITH_STRING (user
, c_user
,
352 entry
= getpwnam (c_user
));
355 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
357 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
358 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
359 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
360 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
361 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
363 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (""));
365 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
366 if (!entry
->pw_shell
)
367 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (""));
369 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
373 #endif /* HAVE_GETPWENT */
377 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
379 "If called with a true argument, initialize or reset the password data\n"
380 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
381 "@code{endpwent} procedures are implemented on top of this.")
382 #define FUNC_NAME s_scm_setpwent
384 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
388 return SCM_UNSPECIFIED
;
395 /* Combines getgrgid and getgrnam. */
396 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
398 "Look up an entry in the group database. @var{name} can be an\n"
399 "integer, a string, or omitted, giving the behaviour of\n"
400 "@code{getgrgid}, @code{getgrnam} or @code{getgrent}\n"
402 #define FUNC_NAME s_scm_getgrgid
405 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
407 if (SCM_UNBNDP (name
) || scm_is_false (name
))
409 SCM_SYSCALL (entry
= getgrent ());
415 else if (scm_is_integer (name
))
416 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
418 STRING_SYSCALL (name
, c_name
,
419 entry
= getgrnam (c_name
));
423 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
424 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
425 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
426 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
433 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
435 "If called with a true argument, initialize or reset the group data\n"
436 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
437 "@code{endgrent} procedures are implemented on top of this.")
438 #define FUNC_NAME s_scm_setgrent
440 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
444 return SCM_UNSPECIFIED
;
447 #endif /* HAVE_GETGRENT */
450 #ifdef HAVE_GETRLIMIT
452 SCM_SYMBOL (sym_as
, "as");
455 SCM_SYMBOL (sym_core
, "core");
458 SCM_SYMBOL (sym_cpu
, "cpu");
461 SCM_SYMBOL (sym_data
, "data");
464 SCM_SYMBOL (sym_fsize
, "fsize");
466 #ifdef RLIMIT_MEMLOCK
467 SCM_SYMBOL (sym_memlock
, "memlock");
469 #ifdef RLIMIT_MSGQUEUE
470 SCM_SYMBOL (sym_msgqueue
, "msgqueue");
473 SCM_SYMBOL (sym_nice
, "nice");
476 SCM_SYMBOL (sym_nofile
, "nofile");
479 SCM_SYMBOL (sym_nproc
, "nproc");
482 SCM_SYMBOL (sym_rss
, "rss");
485 SCM_SYMBOL (sym_rtprio
, "rtprio");
488 SCM_SYMBOL (sym_rttime
, "rttime");
490 #ifdef RLIMIT_SIGPENDING
491 SCM_SYMBOL (sym_sigpending
, "sigpending");
494 SCM_SYMBOL (sym_stack
, "stack");
498 scm_to_resource (SCM s
, const char *func
, int pos
)
500 if (scm_is_number (s
))
501 return scm_to_int (s
);
503 SCM_ASSERT_TYPE (scm_is_symbol (s
), s
, pos
, func
, "symbol");
506 if (scm_is_eq (s
, sym_as
))
510 if (scm_is_eq (s
, sym_core
))
514 if (scm_is_eq (s
, sym_cpu
))
518 if (scm_is_eq (s
, sym_data
))
522 if (scm_is_eq (s
, sym_fsize
))
525 #ifdef RLIMIT_MEMLOCK
526 if (scm_is_eq (s
, sym_memlock
))
527 return RLIMIT_MEMLOCK
;
529 #ifdef RLIMIT_MSGQUEUE
530 if (scm_is_eq (s
, sym_msgqueue
))
531 return RLIMIT_MSGQUEUE
;
534 if (scm_is_eq (s
, sym_nice
))
538 if (scm_is_eq (s
, sym_nofile
))
539 return RLIMIT_NOFILE
;
542 if (scm_is_eq (s
, sym_nproc
))
546 if (scm_is_eq (s
, sym_rss
))
550 if (scm_is_eq (s
, sym_rtprio
))
551 return RLIMIT_RTPRIO
;
554 if (scm_is_eq (s
, sym_rttime
))
555 return RLIMIT_RTPRIO
;
557 #ifdef RLIMIT_SIGPENDING
558 if (scm_is_eq (s
, sym_sigpending
))
559 return RLIMIT_SIGPENDING
;
562 if (scm_is_eq (s
, sym_stack
))
566 scm_misc_error (func
, "invalid rlimit resource ~A", scm_list_1 (s
));
570 SCM_DEFINE (scm_getrlimit
, "getrlimit", 1, 0, 0,
572 "Get a resource limit for this process. @var{resource} identifies the resource,\n"
573 "either as an integer or as a symbol. For example, @code{(getrlimit 'stack)}\n"
574 "gets the limits associated with @code{RLIMIT_STACK}.\n\n"
575 "@code{getrlimit} returns two values, the soft and the hard limit. If no\n"
576 "limit is set for the resource in question, the returned limit will be @code{#f}.")
577 #define FUNC_NAME s_scm_getrlimit
580 struct rlimit lim
= { 0, 0 };
582 iresource
= scm_to_resource (resource
, FUNC_NAME
, 1);
584 if (getrlimit (iresource
, &lim
) != 0)
585 scm_syserror (FUNC_NAME
);
587 return scm_values (scm_list_2 ((lim
.rlim_cur
== RLIM_INFINITY
) ? SCM_BOOL_F
588 : scm_from_long (lim
.rlim_cur
),
589 (lim
.rlim_max
== RLIM_INFINITY
) ? SCM_BOOL_F
590 : scm_from_long (lim
.rlim_max
)));
595 #ifdef HAVE_SETRLIMIT
596 SCM_DEFINE (scm_setrlimit
, "setrlimit", 3, 0, 0,
597 (SCM resource
, SCM soft
, SCM hard
),
598 "Set a resource limit for this process. @var{resource} identifies the resource,\n"
599 "either as an integer or as a symbol. @var{soft} and @var{hard} should be integers,\n"
600 "or @code{#f} to indicate no limit (i.e., @code{RLIM_INFINITY}).\n\n"
601 "For example, @code{(setrlimit 'stack 150000 300000)} sets the @code{RLIMIT_STACK}\n"
602 "limit to 150 kilobytes, with a hard limit of 300 kB.")
603 #define FUNC_NAME s_scm_setrlimit
606 struct rlimit lim
= { 0, 0 };
608 iresource
= scm_to_resource (resource
, FUNC_NAME
, 1);
610 lim
.rlim_cur
= scm_is_false (soft
) ? RLIM_INFINITY
: scm_to_long (soft
);
611 lim
.rlim_max
= scm_is_false (hard
) ? RLIM_INFINITY
: scm_to_long (hard
);
613 if (setrlimit (iresource
, &lim
) != 0)
614 scm_syserror (FUNC_NAME
);
616 return SCM_UNSPECIFIED
;
619 #endif /* HAVE_SETRLIMIT */
620 #endif /* HAVE_GETRLIMIT */
623 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
625 "Sends a signal to the specified process or group of processes.\n\n"
626 "@var{pid} specifies the processes to which the signal is sent:\n\n"
628 "@item @var{pid} greater than 0\n"
629 "The process whose identifier is @var{pid}.\n"
630 "@item @var{pid} equal to 0\n"
631 "All processes in the current process group.\n"
632 "@item @var{pid} less than -1\n"
633 "The process group whose identifier is -@var{pid}\n"
634 "@item @var{pid} equal to -1\n"
635 "If the process is privileged, all processes except for some special\n"
636 "system processes. Otherwise, all processes with the current effective\n"
639 "@var{sig} should be specified using a variable corresponding to\n"
640 "the Unix symbolic name, e.g.,\n\n"
645 "Interrupt signal.\n"
647 #define FUNC_NAME s_scm_kill
649 /* Signal values are interned in scm_init_posix(). */
651 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
654 /* Mingw has raise(), but not kill(). (Other raw DOS environments might
655 be similar.) Use raise() when the requested pid is our own process,
657 if (scm_to_int (pid
) == getpid ())
659 if (raise (scm_to_int (sig
)) != 0)
671 return SCM_UNSPECIFIED
;
676 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
677 (SCM pid
, SCM options
),
678 "This procedure collects status information from a child process which\n"
679 "has terminated or (optionally) stopped. Normally it will\n"
680 "suspend the calling process until this can be done. If more than one\n"
681 "child process is eligible then one will be chosen by the operating system.\n\n"
682 "The value of @var{pid} determines the behaviour:\n\n"
684 "@item @var{pid} greater than 0\n"
685 "Request status information from the specified child process.\n"
686 "@item @var{pid} equal to -1 or WAIT_ANY\n"
687 "Request status information for any child process.\n"
688 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
689 "Request status information for any child process in the current process\n"
691 "@item @var{pid} less than -1\n"
692 "Request status information for any child process whose process group ID\n"
695 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
696 "values of zero or more of the following variables:\n\n"
698 "Return immediately even if there are no child processes to be collected.\n"
700 "@defvar WUNTRACED\n"
701 "Report status information for stopped processes as well as terminated\n"
704 "The return value is a pair containing:\n\n"
707 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
708 "specified and no process was collected.\n"
710 "The integer status value.\n"
712 #define FUNC_NAME s_scm_waitpid
717 if (SCM_UNBNDP (options
))
721 /* Flags are interned in scm_init_posix. */
722 ioptions
= scm_to_int (options
);
724 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
727 return scm_cons (scm_from_int (i
), scm_from_int (status
));
730 #endif /* HAVE_WAITPID */
733 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
735 "Return the exit status value, as would be set if a process\n"
736 "ended normally through a call to @code{exit} or @code{_exit},\n"
737 "if any, otherwise @code{#f}.")
738 #define FUNC_NAME s_scm_status_exit_val
742 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
744 lstatus
= scm_to_int (status
);
745 if (WIFEXITED (lstatus
))
746 return (scm_from_int (WEXITSTATUS (lstatus
)));
752 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
754 "Return the signal number which terminated the process, if any,\n"
755 "otherwise @code{#f}.")
756 #define FUNC_NAME s_scm_status_term_sig
760 lstatus
= scm_to_int (status
);
761 if (WIFSIGNALED (lstatus
))
762 return scm_from_int (WTERMSIG (lstatus
));
768 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
770 "Return the signal number which stopped the process, if any,\n"
771 "otherwise @code{#f}.")
772 #define FUNC_NAME s_scm_status_stop_sig
776 lstatus
= scm_to_int (status
);
777 if (WIFSTOPPED (lstatus
))
778 return scm_from_int (WSTOPSIG (lstatus
));
783 #endif /* __MINGW32__ */
786 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
788 "Return an integer representing the process ID of the parent\n"
790 #define FUNC_NAME s_scm_getppid
792 return scm_from_int (getppid ());
795 #endif /* HAVE_GETPPID */
799 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
801 "Return an integer representing the current real user ID.")
802 #define FUNC_NAME s_scm_getuid
804 return scm_from_int (getuid ());
810 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
812 "Return an integer representing the current real group ID.")
813 #define FUNC_NAME s_scm_getgid
815 return scm_from_int (getgid ());
821 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
823 "Return an integer representing the current effective user ID.\n"
824 "If the system does not support effective IDs, then the real ID\n"
825 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
826 "system supports effective IDs.")
827 #define FUNC_NAME s_scm_geteuid
830 return scm_from_int (geteuid ());
832 return scm_from_int (getuid ());
838 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
840 "Return an integer representing the current effective group 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_getegid
847 return scm_from_int (getegid ());
849 return scm_from_int (getgid ());
855 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
857 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
858 "the process has appropriate privileges.\n"
859 "The return value is unspecified.")
860 #define FUNC_NAME s_scm_setuid
862 if (setuid (scm_to_int (id
)) != 0)
864 return SCM_UNSPECIFIED
;
868 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
870 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
871 "the process has appropriate privileges.\n"
872 "The return value is unspecified.")
873 #define FUNC_NAME s_scm_setgid
875 if (setgid (scm_to_int (id
)) != 0)
877 return SCM_UNSPECIFIED
;
881 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
883 "Sets the effective user ID to the integer @var{id}, provided the process\n"
884 "has appropriate privileges. If effective IDs are not supported, the\n"
885 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
886 "system supports effective IDs.\n"
887 "The return value is unspecified.")
888 #define FUNC_NAME s_scm_seteuid
893 rv
= seteuid (scm_to_int (id
));
895 rv
= setuid (scm_to_int (id
));
899 return SCM_UNSPECIFIED
;
902 #endif /* __MINGW32__ */
906 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
908 "Sets the effective group ID to the integer @var{id}, provided the process\n"
909 "has appropriate privileges. If effective IDs are not supported, the\n"
910 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
911 "system supports effective IDs.\n"
912 "The return value is unspecified.")
913 #define FUNC_NAME s_scm_setegid
918 rv
= setegid (scm_to_int (id
));
920 rv
= setgid (scm_to_int (id
));
924 return SCM_UNSPECIFIED
;
932 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
934 "Return an integer representing the current process group ID.\n"
935 "This is the POSIX definition, not BSD.")
936 #define FUNC_NAME s_scm_getpgrp
939 fn
= (int (*) ()) getpgrp
;
940 return scm_from_int (fn (0));
943 #endif /* HAVE_GETPGRP */
947 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
949 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
950 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
952 "Fails on systems that do not support job control.\n"
953 "The return value is unspecified.")
954 #define FUNC_NAME s_scm_setpgid
956 /* FIXME(?): may be known as setpgrp. */
957 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
959 return SCM_UNSPECIFIED
;
962 #endif /* HAVE_SETPGID */
965 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
967 "Creates a new session. The current process becomes the session leader\n"
968 "and is put in a new process group. The process will be detached\n"
969 "from its controlling terminal if it has one.\n"
970 "The return value is an integer representing the new process group ID.")
971 #define FUNC_NAME s_scm_setsid
973 pid_t sid
= setsid ();
976 return SCM_UNSPECIFIED
;
979 #endif /* HAVE_SETSID */
982 SCM_DEFINE (scm_getsid
, "getsid", 1, 0, 0,
984 "Returns the session ID of process @var{pid}. (The session\n"
985 "ID of a process is the process group ID of its session leader.)")
986 #define FUNC_NAME s_scm_getsid
988 return scm_from_int (getsid (scm_to_int (pid
)));
991 #endif /* HAVE_GETSID */
994 /* ttyname returns its result in a single static buffer, hence
995 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
996 continuously calling ttyname will otherwise get an overwrite quite
999 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
1000 there's probably little to be gained in either speed or parallelism. */
1003 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
1005 "Return a string with the name of the serial terminal device\n"
1006 "underlying @var{port}.")
1007 #define FUNC_NAME s_scm_ttyname
1011 SCM ret
= SCM_BOOL_F
;
1013 port
= SCM_COERCE_OUTPORT (port
);
1014 SCM_VALIDATE_OPPORT (1, port
);
1015 if (!SCM_FPORTP (port
))
1017 fd
= SCM_FPORT_FDES (port
);
1019 scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex
);
1021 SCM_SYSCALL (result
= ttyname (fd
));
1024 result
= strdup (result
);
1026 scm_i_pthread_mutex_unlock (&scm_i_misc_mutex
);
1034 ret
= scm_take_locale_string (result
);
1039 #endif /* HAVE_TTYNAME */
1042 /* For thread safety "buf" is used instead of NULL for the ctermid static
1043 buffer. Actually it's unlikely the controlling terminal will change
1044 during program execution, and indeed on glibc (2.3.2) it's always just
1045 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
1046 safety everywhere. */
1048 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
1050 "Return a string containing the file name of the controlling\n"
1051 "terminal for the current process.")
1052 #define FUNC_NAME s_scm_ctermid
1054 char buf
[L_ctermid
];
1055 char *result
= ctermid (buf
);
1056 if (*result
== '\0')
1058 return scm_from_locale_string (result
);
1061 #endif /* HAVE_CTERMID */
1063 #ifdef HAVE_TCGETPGRP
1064 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
1066 "Return the process group ID of the foreground process group\n"
1067 "associated with the terminal open on the file descriptor\n"
1068 "underlying @var{port}.\n"
1070 "If there is no foreground process group, the return value is a\n"
1071 "number greater than 1 that does not match the process group ID\n"
1072 "of any existing process group. This can happen if all of the\n"
1073 "processes in the job that was formerly the foreground job have\n"
1074 "terminated, and no other job has yet been moved into the\n"
1076 #define FUNC_NAME s_scm_tcgetpgrp
1081 port
= SCM_COERCE_OUTPORT (port
);
1083 SCM_VALIDATE_OPFPORT (1, port
);
1084 fd
= SCM_FPORT_FDES (port
);
1085 if ((pgid
= tcgetpgrp (fd
)) == -1)
1087 return scm_from_int (pgid
);
1090 #endif /* HAVE_TCGETPGRP */
1092 #ifdef HAVE_TCSETPGRP
1093 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
1094 (SCM port
, SCM pgid
),
1095 "Set the foreground process group ID for the terminal used by the file\n"
1096 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
1097 "The calling process\n"
1098 "must be a member of the same session as @var{pgid} and must have the same\n"
1099 "controlling terminal. The return value is unspecified.")
1100 #define FUNC_NAME s_scm_tcsetpgrp
1104 port
= SCM_COERCE_OUTPORT (port
);
1106 SCM_VALIDATE_OPFPORT (1, port
);
1107 fd
= SCM_FPORT_FDES (port
);
1108 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
1110 return SCM_UNSPECIFIED
;
1113 #endif /* HAVE_TCSETPGRP */
1115 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
1116 (SCM filename
, SCM args
),
1117 "Executes the file named by @var{filename} as a new process image.\n"
1118 "The remaining arguments are supplied to the process; from a C program\n"
1119 "they are accessible as the @code{argv} argument to @code{main}.\n"
1120 "Conventionally the first @var{arg} is the same as @var{filename}.\n"
1121 "All arguments must be strings.\n\n"
1122 "If @var{arg} is missing, @var{path} is executed with a null\n"
1123 "argument list, which may have system-dependent side-effects.\n\n"
1124 "This procedure is currently implemented using the @code{execv} system\n"
1125 "call, but we call it @code{execl} because of its Scheme calling interface.")
1126 #define FUNC_NAME s_scm_execl
1131 scm_dynwind_begin (0);
1133 exec_file
= scm_to_locale_string (filename
);
1134 scm_dynwind_free (exec_file
);
1136 exec_argv
= scm_i_allocate_string_pointers (args
);
1138 execv (exec_file
, exec_argv
);
1147 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
1148 (SCM filename
, SCM args
),
1149 "Similar to @code{execl}, however if\n"
1150 "@var{filename} does not contain a slash\n"
1151 "then the file to execute will be located by searching the\n"
1152 "directories listed in the @code{PATH} environment variable.\n\n"
1153 "This procedure is currently implemented using the @code{execvp} system\n"
1154 "call, but we call it @code{execlp} because of its Scheme calling interface.")
1155 #define FUNC_NAME s_scm_execlp
1160 scm_dynwind_begin (0);
1162 exec_file
= scm_to_locale_string (filename
);
1163 scm_dynwind_free (exec_file
);
1165 exec_argv
= scm_i_allocate_string_pointers (args
);
1167 execvp (exec_file
, exec_argv
);
1177 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
1178 list strings the way environ_list_to_c gives. */
1180 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
1181 (SCM filename
, SCM env
, SCM args
),
1182 "Similar to @code{execl}, but the environment of the new process is\n"
1183 "specified by @var{env}, which must be a list of strings as returned by the\n"
1184 "@code{environ} procedure.\n\n"
1185 "This procedure is currently implemented using the @code{execve} system\n"
1186 "call, but we call it @code{execle} because of its Scheme calling interface.")
1187 #define FUNC_NAME s_scm_execle
1193 scm_dynwind_begin (0);
1195 exec_file
= scm_to_locale_string (filename
);
1196 scm_dynwind_free (exec_file
);
1198 exec_argv
= scm_i_allocate_string_pointers (args
);
1199 exec_env
= scm_i_allocate_string_pointers (env
);
1201 execve (exec_file
, exec_argv
, exec_env
);
1211 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1213 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1214 "In the child the return value is 0. In the parent the return value is\n"
1215 "the integer process ID of the child.\n\n"
1216 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1217 "with the scsh fork.")
1218 #define FUNC_NAME s_scm_fork
1221 if (scm_ilength (scm_all_threads ()) != 1)
1222 /* Other threads may be holding on to resources that Guile needs --
1223 it is not safe to permit one thread to fork while others are
1226 In addition, POSIX clearly specifies that if a multi-threaded
1227 program forks, the child must only call functions that are
1228 async-signal-safe. We can't guarantee that in general. The best
1229 we can do is to allow forking only very early, before any call to
1230 sigaction spawns the signal-handling thread. */
1232 (scm_from_latin1_string
1233 ("warning: call to primitive-fork while multiple threads are running;\n"
1234 " further behavior unspecified. See \"Processes\" in the\n"
1235 " manual, for more information.\n"),
1236 scm_current_warning_port ());
1240 return scm_from_int (pid
);
1244 /* Since Guile uses threads, we have to be very careful to avoid calling
1245 functions that are not async-signal-safe in the child. That's why
1246 this function is implemented in C. */
1248 scm_open_process (SCM mode
, SCM prog
, SCM args
)
1249 #define FUNC_NAME "open-process"
1252 int reading
, writing
;
1253 int c2p
[2]; /* Child to parent. */
1254 int p2c
[2]; /* Parent to child. */
1255 int in
= -1, out
= -1, err
= -1;
1261 exec_file
= scm_to_locale_string (prog
);
1262 exec_argv
= scm_i_allocate_string_pointers (scm_cons (prog
, args
));
1264 mode_bits
= scm_i_mode_bits (mode
);
1265 reading
= mode_bits
& SCM_RDNG
;
1266 writing
= mode_bits
& SCM_WRTNG
;
1272 int errno_save
= errno
;
1284 int errno_save
= errno
;
1300 if (SCM_OPOUTFPORTP ((port
= scm_current_error_port ())))
1301 err
= SCM_FPORT_FDES (port
);
1302 if (out
== -1 && SCM_OPOUTFPORTP ((port
= scm_current_output_port ())))
1303 out
= SCM_FPORT_FDES (port
);
1304 if (in
== -1 && SCM_OPINFPORTP ((port
= scm_current_input_port ())))
1305 in
= SCM_FPORT_FDES (port
);
1308 #if defined (HAVE_GETRLIMIT) && defined (RLIMIT_NOFILE)
1310 struct rlimit lim
= { 0, 0 };
1311 if (getrlimit (RLIMIT_NOFILE
, &lim
) == 0)
1312 max_fd
= lim
.rlim_cur
;
1320 int errno_save
= errno
;
1339 SCM read_port
= SCM_BOOL_F
, write_port
= SCM_BOOL_F
;
1341 /* There is no sense in catching errors on close(). */
1345 read_port
= scm_fdes_to_port (c2p
[0], "r", sym_read_pipe
);
1346 scm_setvbuf (read_port
, scm_from_int (_IONBF
), SCM_UNDEFINED
);
1351 write_port
= scm_fdes_to_port (p2c
[1], "w", sym_write_pipe
);
1352 scm_setvbuf (write_port
, scm_from_int (_IONBF
), SCM_UNDEFINED
);
1356 (scm_list_3 (read_port
, write_port
, scm_from_int (pid
)));
1365 /* Close all file descriptors in ports inherited from the parent
1366 except for in, out, and err. Heavy-handed, but robust. */
1368 if (max_fd
!= in
&& max_fd
!= out
&& max_fd
!= err
)
1371 /* Ignore errors on these open() calls. */
1373 in
= open ("/dev/null", O_RDONLY
);
1375 out
= open ("/dev/null", O_WRONLY
);
1377 err
= open ("/dev/null", O_WRONLY
);
1382 do out
= dup (out
); while (errno
== EINTR
);
1384 do err
= dup (err
); while (errno
== EINTR
);
1385 do dup2 (in
, 0); while (errno
== EINTR
);
1391 do err
= dup (err
); while (errno
== EINTR
);
1392 do dup2 (out
, 1); while (errno
== EINTR
);
1397 do dup2 (err
, 2); while (errno
== EINTR
);
1401 execvp (exec_file
, exec_argv
);
1403 /* The exec failed! There is nothing sensible to do. */
1406 char *msg
= strerror (errno
);
1407 fprintf (fdopen (err
, "a"), "In execlp of %s: %s\n",
1411 _exit (EXIT_FAILURE
);
1416 #endif /* HAVE_FORK */
1419 # include "win32-uname.h"
1422 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1423 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1425 "Return an object with some information about the computer\n"
1426 "system the program is running on.")
1427 #define FUNC_NAME s_scm_uname
1430 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1431 if (uname (&buf
) < 0)
1433 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1434 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1435 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1436 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1437 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1440 SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1445 #endif /* HAVE_UNAME */
1447 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1449 "If @var{env} is omitted, return the current environment (in the\n"
1450 "Unix sense) as a list of strings. Otherwise set the current\n"
1451 "environment, which is also the default environment for child\n"
1452 "processes, to the supplied list of strings. Each member of\n"
1453 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1454 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1455 "then the return value is unspecified.")
1456 #define FUNC_NAME s_scm_environ
1458 if (SCM_UNBNDP (env
))
1459 return scm_makfromstrs (-1, environ
);
1462 environ
= scm_i_allocate_string_pointers (env
);
1463 return SCM_UNSPECIFIED
;
1470 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1472 "Return a name in the file system that does not match any\n"
1473 "existing file. However there is no guarantee that another\n"
1474 "process will not create the file after @code{tmpnam} is called.\n"
1475 "Care should be taken if opening the file, e.g., use the\n"
1476 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1477 #define FUNC_NAME s_scm_tmpnam
1479 char name
[L_tmpnam
];
1482 SCM_SYSCALL (rv
= tmpnam (name
));
1484 /* not SCM_SYSERROR since errno probably not set. */
1485 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1486 return scm_from_locale_string (name
);
1492 SCM_DEFINE (scm_tmpfile
, "tmpfile", 0, 0, 0,
1494 "Return an input/output port to a unique temporary file\n"
1495 "named using the path prefix @code{P_tmpdir} defined in\n"
1497 "The file is automatically deleted when the port is closed\n"
1498 "or the program terminates.")
1499 #define FUNC_NAME s_scm_tmpfile
1504 if (! (rv
= tmpfile ()))
1508 fd
= dup (fileno (rv
));
1512 /* FIXME: leaking the file, it will never be closed! */
1515 return scm_fdes_to_port (fd
, "w+", SCM_BOOL_F
);
1519 SCM_DEFINE (scm_utime
, "utime", 1, 5, 0,
1520 (SCM pathname
, SCM actime
, SCM modtime
, SCM actimens
, SCM modtimens
,
1522 "@code{utime} sets the access and modification times for the\n"
1523 "file named by @var{pathname}. If @var{actime} or @var{modtime} is\n"
1524 "not supplied, then the current time is used. @var{actime} and\n"
1525 "@var{modtime} must be integer time values as returned by the\n"
1526 "@code{current-time} procedure.\n\n"
1527 "The optional @var{actimens} and @var{modtimens} are nanoseconds\n"
1528 "to add @var{actime} and @var{modtime}. Nanosecond precision is\n"
1529 "only supported on some combinations of file systems and operating\n"
1532 "(utime \"foo\" (- (current-time) 3600))\n"
1534 "will set the access time to one hour in the past and the\n"
1535 "modification time to the current time.")
1536 #define FUNC_NAME s_scm_utime
1539 time_t atim_sec
, mtim_sec
;
1540 long atim_nsec
, mtim_nsec
;
1543 if (SCM_UNBNDP (actime
))
1545 #ifdef HAVE_UTIMENSAT
1547 atim_nsec
= UTIME_NOW
;
1549 SCM_SYSCALL (time (&atim_sec
));
1555 atim_sec
= SCM_NUM2ULONG (2, actime
);
1556 if (SCM_UNBNDP (actimens
))
1559 atim_nsec
= SCM_NUM2LONG (4, actimens
);
1562 if (SCM_UNBNDP (modtime
))
1564 #ifdef HAVE_UTIMENSAT
1566 mtim_nsec
= UTIME_NOW
;
1568 SCM_SYSCALL (time (&mtim_sec
));
1574 mtim_sec
= SCM_NUM2ULONG (3, modtime
);
1575 if (SCM_UNBNDP (modtimens
))
1578 mtim_nsec
= SCM_NUM2LONG (5, modtimens
);
1581 if (SCM_UNBNDP (flags
))
1584 f
= SCM_NUM2INT (6, flags
);
1586 #ifdef HAVE_UTIMENSAT
1588 struct timespec times
[2];
1589 times
[0].tv_sec
= atim_sec
;
1590 times
[0].tv_nsec
= atim_nsec
;
1591 times
[1].tv_sec
= mtim_sec
;
1592 times
[1].tv_nsec
= mtim_nsec
;
1594 STRING_SYSCALL (pathname
, c_pathname
,
1595 rv
= utimensat (AT_FDCWD
, c_pathname
, times
, f
));
1600 utm
.actime
= atim_sec
;
1601 utm
.modtime
= mtim_sec
;
1602 /* Silence warnings. */
1607 scm_out_of_range(FUNC_NAME
, flags
);
1609 STRING_SYSCALL (pathname
, c_pathname
,
1610 rv
= utime (c_pathname
, &utm
));
1616 return SCM_UNSPECIFIED
;
1620 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1622 "Return an integer representing the current process ID.")
1623 #define FUNC_NAME s_scm_getpid
1625 return scm_from_ulong (getpid ());
1629 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1631 "Modifies the environment of the current process, which is also\n"
1632 "the default environment inherited by child processes. If\n"
1633 "@var{str} is of the form @code{NAME=VALUE} then it will be\n"
1634 "written directly into the environment, replacing any existing\n"
1635 "environment string with name matching @code{NAME}. If\n"
1636 "@var{str} does not contain an equal sign, then any existing\n"
1637 "string with name matching @var{str} will be removed.\n"
1639 "The return value is unspecified.")
1640 #define FUNC_NAME s_scm_putenv
1643 char *c_str
= scm_to_locale_string (str
);
1645 /* Leave C_STR in the environment. */
1647 /* Gnulib's `putenv' module honors the semantics described above. */
1648 rv
= putenv (c_str
);
1652 return SCM_UNSPECIFIED
;
1656 /* This mutex is used to serialize invocations of `setlocale ()' on non-GNU
1657 systems (i.e., systems where a reentrant locale API is not available). It
1658 is also acquired before calls to `nl_langinfo ()'. See `i18n.c' for
1660 scm_i_pthread_mutex_t scm_i_locale_mutex
= SCM_I_PTHREAD_MUTEX_INITIALIZER
;
1662 #ifdef HAVE_SETLOCALE
1664 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1665 (SCM category
, SCM locale
),
1666 "If @var{locale} is omitted, return the current value of the\n"
1667 "specified locale category as a system-dependent string.\n"
1668 "@var{category} should be specified using the values\n"
1669 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1671 "Otherwise the specified locale category is set to the string\n"
1672 "@var{locale} and the new value is returned as a\n"
1673 "system-dependent string. If @var{locale} is an empty string,\n"
1674 "the locale will be set using environment variables.\n"
1676 "When the locale is changed, the character encoding of the new\n"
1677 "locale (UTF-8, ISO-8859-1, etc.) is used for the current\n"
1678 "input, output, and error ports\n")
1679 #define FUNC_NAME s_scm_setlocale
1686 scm_dynwind_begin (0);
1688 if (SCM_UNBNDP (locale
))
1694 clocale
= scm_to_locale_string (locale
);
1695 scm_dynwind_free (clocale
);
1698 c_category
= scm_i_to_lc_category (category
, 1);
1700 scm_i_pthread_mutex_lock (&scm_i_locale_mutex
);
1701 rv
= setlocale (c_category
, clocale
);
1702 scm_i_pthread_mutex_unlock (&scm_i_locale_mutex
);
1706 /* POSIX and C99 don't say anything about setlocale setting errno, so
1707 force a sensible value here. glibc leaves ENOENT, which would be
1708 fine, but it's not a documented feature. */
1713 enc
= locale_charset ();
1715 /* Set the default encoding for new ports. */
1716 scm_i_set_default_port_encoding (enc
);
1718 /* Set the encoding for the stdio ports. */
1719 scm_i_set_port_encoding_x (scm_current_input_port (), enc
);
1720 scm_i_set_port_encoding_x (scm_current_output_port (), enc
);
1721 scm_i_set_port_encoding_x (scm_current_error_port (), enc
);
1724 return scm_from_locale_string (rv
);
1727 #endif /* HAVE_SETLOCALE */
1730 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1731 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1732 "Creates a new special file, such as a file corresponding to a device.\n"
1733 "@var{path} specifies the name of the file. @var{type} should\n"
1734 "be one of the following symbols:\n"
1735 "regular, directory, symlink, block-special, char-special,\n"
1736 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1737 "@var{dev} (an integer) specifies which device the special file refers\n"
1738 "to. Its exact interpretation depends on the kind of special file\n"
1739 "being created.\n\n"
1742 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1744 "The return value is unspecified.")
1745 #define FUNC_NAME s_scm_mknod
1751 SCM_VALIDATE_STRING (1, path
);
1752 SCM_VALIDATE_SYMBOL (2, type
);
1754 p
= scm_i_symbol_chars (type
);
1755 if (strcmp (p
, "regular") == 0)
1757 else if (strcmp (p
, "directory") == 0)
1760 /* systems without symlinks probably don't have S_IFLNK defined */
1761 else if (strcmp (p
, "symlink") == 0)
1764 else if (strcmp (p
, "block-special") == 0)
1766 else if (strcmp (p
, "char-special") == 0)
1768 else if (strcmp (p
, "fifo") == 0)
1771 else if (strcmp (p
, "socket") == 0)
1775 SCM_OUT_OF_RANGE (2, type
);
1777 STRING_SYSCALL (path
, c_path
,
1778 val
= mknod (c_path
,
1779 ctype
| scm_to_int (perms
),
1783 return SCM_UNSPECIFIED
;
1786 #endif /* HAVE_MKNOD */
1789 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1791 "Increment the priority of the current process by @var{incr}. A higher\n"
1792 "priority value means that the process runs less often.\n"
1793 "The return value is unspecified.")
1794 #define FUNC_NAME s_scm_nice
1796 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1797 from "prio-NZERO", so an error must be detected from errno changed */
1799 nice (scm_to_int (incr
));
1803 return SCM_UNSPECIFIED
;
1806 #endif /* HAVE_NICE */
1809 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1811 "Flush the operating system disk buffers.\n"
1812 "The return value is unspecified.")
1813 #define FUNC_NAME s_scm_sync
1816 return SCM_UNSPECIFIED
;
1819 #endif /* HAVE_SYNC */
1822 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1823 to avoid another thread overwriting it. A test program running crypt
1824 continuously in two threads can be quickly seen tripping this problem.
1825 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1827 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1828 slower (about 5x) than plain crypt if you pass an uninitialized data
1829 block each time. Presumably there's some one-time setups. The best way
1830 to use crypt_r for parallel execution in multiple threads would probably
1831 be to maintain a little pool of initialized crypt_data structures, take
1832 one and use it, then return it to the pool. That pool could be garbage
1833 collected so it didn't add permanently to memory use if only a few crypt
1834 calls are made. But we expect crypt will be used rarely, and even more
1835 rarely will there be any desire for lots of parallel execution on
1836 multiple cpus. So for now we don't bother with anything fancy, just
1840 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1841 (SCM key
, SCM salt
),
1842 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1843 "crypt(3) library call.")
1844 #define FUNC_NAME s_scm_crypt
1847 char *c_key
, *c_salt
, *c_ret
;
1849 scm_dynwind_begin (0);
1850 scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex
);
1852 c_key
= scm_to_locale_string (key
);
1853 scm_dynwind_free (c_key
);
1854 c_salt
= scm_to_locale_string (salt
);
1855 scm_dynwind_free (c_salt
);
1857 /* The Linux crypt(3) man page says crypt will return NULL and set errno
1858 on error. (Eg. ENOSYS if legal restrictions mean it cannot be
1860 c_ret
= crypt (c_key
, c_salt
);
1864 ret
= scm_from_locale_string (c_ret
);
1869 #endif /* HAVE_CRYPT */
1872 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1874 "Change the root directory to that specified in @var{path}.\n"
1875 "This directory will be used for path names beginning with\n"
1876 "@file{/}. The root directory is inherited by all children\n"
1877 "of the current process. Only the superuser may change the\n"
1879 #define FUNC_NAME s_scm_chroot
1883 WITH_STRING (path
, c_path
,
1884 rv
= chroot (c_path
));
1887 return SCM_UNSPECIFIED
;
1890 #endif /* HAVE_CHROOT */
1892 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1894 "Return a string containing the name of the user logged in on\n"
1895 "the controlling terminal of the process, or @code{#f} if this\n"
1896 "information cannot be obtained.")
1897 #define FUNC_NAME s_scm_getlogin
1904 return scm_from_locale_string (p
);
1908 #if HAVE_GETPRIORITY
1909 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1910 (SCM which
, SCM who
),
1911 "Return the scheduling priority of the process, process group\n"
1912 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1913 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1914 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1915 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1916 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1917 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1918 "denotes the current process, process group, or user. Return\n"
1919 "the highest priority (lowest numerical value) of any of the\n"
1920 "specified processes.")
1921 #define FUNC_NAME s_scm_getpriority
1923 int cwhich
, cwho
, ret
;
1925 cwhich
= scm_to_int (which
);
1926 cwho
= scm_to_int (who
);
1928 /* We have to clear errno and examine it later, because -1 is a
1929 legal return value for getpriority(). */
1931 ret
= getpriority (cwhich
, cwho
);
1934 return scm_from_int (ret
);
1937 #endif /* HAVE_GETPRIORITY */
1939 #if HAVE_SETPRIORITY
1940 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1941 (SCM which
, SCM who
, SCM prio
),
1942 "Set the scheduling priority of the process, process group\n"
1943 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1944 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1945 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1946 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1947 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1948 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1949 "denotes the current process, process group, or user.\n"
1950 "@var{prio} is a value in the range -20 and 20, the default\n"
1951 "priority is 0; lower priorities cause more favorable\n"
1952 "scheduling. Sets the priority of all of the specified\n"
1953 "processes. Only the super-user may lower priorities.\n"
1954 "The return value is not specified.")
1955 #define FUNC_NAME s_scm_setpriority
1957 int cwhich
, cwho
, cprio
;
1959 cwhich
= scm_to_int (which
);
1960 cwho
= scm_to_int (who
);
1961 cprio
= scm_to_int (prio
);
1963 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1965 return SCM_UNSPECIFIED
;
1968 #endif /* HAVE_SETPRIORITY */
1970 #ifdef HAVE_SCHED_GETAFFINITY
1973 cpu_set_to_bitvector (const cpu_set_t
*cs
)
1978 bv
= scm_c_make_bitvector (sizeof (*cs
), SCM_BOOL_F
);
1980 for (cpu
= 0; cpu
< sizeof (*cs
); cpu
++)
1982 if (CPU_ISSET (cpu
, cs
))
1983 /* XXX: This is inefficient but avoids code duplication. */
1984 scm_c_bitvector_set_x (bv
, cpu
, SCM_BOOL_T
);
1990 SCM_DEFINE (scm_getaffinity
, "getaffinity", 1, 0, 0,
1992 "Return a bitvector representing the CPU affinity mask for\n"
1993 "process @var{pid}. Each CPU the process has affinity with\n"
1994 "has its corresponding bit set in the returned bitvector.\n"
1995 "The number of bits set is a good estimate of how many CPUs\n"
1996 "Guile can use without stepping on other processes' toes.\n\n"
1997 "Currently this procedure is only defined on GNU variants\n"
1998 "(@pxref{CPU Affinity, @code{sched_getaffinity},, libc, The\n"
1999 "GNU C Library Reference Manual}).\n")
2000 #define FUNC_NAME s_scm_getaffinity
2006 err
= sched_getaffinity (scm_to_int (pid
), sizeof (cs
), &cs
);
2010 return cpu_set_to_bitvector (&cs
);
2014 #endif /* HAVE_SCHED_GETAFFINITY */
2016 #ifdef HAVE_SCHED_SETAFFINITY
2018 SCM_DEFINE (scm_setaffinity
, "setaffinity", 2, 0, 0,
2019 (SCM pid
, SCM mask
),
2020 "Install the CPU affinity mask @var{mask}, a bitvector, for\n"
2021 "the process or thread with ID @var{pid}. The return value\n"
2022 "is unspecified.\n\n"
2023 "Currently this procedure is only defined on GNU variants\n"
2024 "(@pxref{CPU Affinity, @code{sched_setaffinity},, libc, The\n"
2025 "GNU C Library Reference Manual}).\n")
2026 #define FUNC_NAME s_scm_setaffinity
2029 scm_t_array_handle handle
;
2030 const scm_t_uint32
*c_mask
;
2031 size_t len
, off
, cpu
;
2035 c_mask
= scm_bitvector_elements (mask
, &handle
, &off
, &len
, &inc
);
2038 for (cpu
= 0; cpu
< len
; cpu
++)
2042 idx
= cpu
* inc
+ off
;
2043 if (c_mask
[idx
/ 32] & (1UL << (idx
% 32)))
2047 err
= sched_setaffinity (scm_to_int (pid
), sizeof (cs
), &cs
);
2051 return SCM_UNSPECIFIED
;
2055 #endif /* HAVE_SCHED_SETAFFINITY */
2059 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
2061 "Display @var{prompt} to the standard error output and read\n"
2062 "a password from @file{/dev/tty}. If this file is not\n"
2063 "accessible, it reads from standard input. The password may be\n"
2064 "up to 127 characters in length. Additional characters and the\n"
2065 "terminating newline character are discarded. While reading\n"
2066 "the password, echoing and the generation of signals by special\n"
2067 "characters is disabled.")
2068 #define FUNC_NAME s_scm_getpass
2073 SCM_VALIDATE_STRING (1, prompt
);
2075 WITH_STRING (prompt
, c_prompt
,
2076 p
= getpass(c_prompt
));
2077 passwd
= scm_from_locale_string (p
);
2079 /* Clear out the password in the static buffer. */
2080 memset (p
, 0, strlen (p
));
2085 #endif /* HAVE_GETPASS */
2087 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
2088 (SCM file
, SCM operation
),
2089 "Apply or remove an advisory lock on an open file.\n"
2090 "@var{operation} specifies the action to be done:\n"
2093 "Shared lock. More than one process may hold a shared lock\n"
2094 "for a given file at a given time.\n"
2097 "Exclusive lock. Only one process may hold an exclusive lock\n"
2098 "for a given file at a given time.\n"
2101 "Unlock the file.\n"
2104 "Don't block when locking. This is combined with one of the\n"
2105 "other operations using @code{logior}. If @code{flock} would\n"
2106 "block an @code{EWOULDBLOCK} error is thrown.\n"
2109 "The return value is not specified. @var{file} may be an open\n"
2110 "file descriptor or an open file descriptor port.\n"
2112 "Note that @code{flock} does not lock files across NFS.")
2113 #define FUNC_NAME s_scm_flock
2117 if (scm_is_integer (file
))
2118 fdes
= scm_to_int (file
);
2121 SCM_VALIDATE_OPFPORT (2, file
);
2123 fdes
= SCM_FPORT_FDES (file
);
2125 if (flock (fdes
, scm_to_int (operation
)) == -1)
2127 return SCM_UNSPECIFIED
;
2131 #if HAVE_SETHOSTNAME
2132 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
2134 "Set the host name of the current processor to @var{name}. May\n"
2135 "only be used by the superuser. The return value is not\n"
2137 #define FUNC_NAME s_scm_sethostname
2141 WITH_STRING (name
, c_name
,
2142 rv
= sethostname (c_name
, strlen(c_name
)));
2145 return SCM_UNSPECIFIED
;
2148 #endif /* HAVE_SETHOSTNAME */
2151 #if HAVE_GETHOSTNAME
2152 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
2154 "Return the host name of the current processor.")
2155 #define FUNC_NAME s_scm_gethostname
2157 #ifdef MAXHOSTNAMELEN
2159 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
2160 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
2161 const int len
= MAXHOSTNAMELEN
+ 1;
2162 char *const p
= scm_malloc (len
);
2163 const int res
= gethostname (p
, len
);
2165 scm_dynwind_begin (0);
2166 scm_dynwind_unwind_handler (free
, p
, 0);
2170 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
2171 * large enough. SUSv2 specifies 255 maximum too, apparently. */
2176 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
2178 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
2179 * which may reflect a particular kernel configuration.
2180 * Must watch out for this existing but giving -1, as happens for instance
2181 * in gnu/linux glibc 2.3.2. */
2183 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
2190 p
= scm_malloc (len
);
2192 scm_dynwind_begin (0);
2193 scm_dynwind_unwind_handler (free
, p
, 0);
2195 res
= gethostname (p
, len
);
2196 while (res
== -1 && errno
== ENAMETOOLONG
)
2200 /* scm_realloc may throw an exception. */
2201 p
= scm_realloc (p
, len
);
2202 res
= gethostname (p
, len
);
2209 const int save_errno
= errno
;
2211 /* No guile exceptions can occur before we have freed p's memory. */
2220 /* scm_from_locale_string may throw an exception. */
2221 const SCM name
= scm_from_locale_string (p
);
2223 /* No guile exceptions can occur before we have freed p's memory. */
2231 #endif /* HAVE_GETHOSTNAME */
2236 scm_init_popen (void)
2238 scm_c_define_gsubr ("open-process", 2, 0, 1, scm_open_process
);
2245 scm_add_feature ("posix");
2247 scm_add_feature ("EIDs");
2250 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
2253 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
2256 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
2259 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
2263 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
2266 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
2269 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
2272 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
2275 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
2278 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
2281 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
2284 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
2287 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
2290 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
2293 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
2295 #ifdef LC_MEASUREMENT
2296 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
2298 #ifdef LC_IDENTIFICATION
2299 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
2302 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
2306 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
2309 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
2312 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
2316 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
2319 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
2322 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
2325 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
2328 #include "libguile/cpp-SIG.c"
2329 #include "libguile/posix.x"
2332 scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION
,
2334 (scm_t_extension_init_func
) scm_init_popen
,
2336 #endif /* HAVE_FORK */