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
28 #include "libguile/_scm.h"
29 #include "libguile/dynwind.h"
30 #include "libguile/fports.h"
31 #include "libguile/scmsigs.h"
32 #include "libguile/feature.h"
33 #include "libguile/strings.h"
34 #include "libguile/srfi-13.h"
35 #include "libguile/srfi-14.h"
36 #include "libguile/vectors.h"
37 #include "libguile/values.h"
38 #include "libguile/lang.h"
40 #include "libguile/validate.h"
41 #include "libguile/posix.h"
42 #include "libguile/gettext.h"
43 #include "libguile/threads.h"
49 #ifdef TIME_WITH_SYS_TIME
50 # include <sys/time.h>
54 # include <sys/time.h>
64 extern char *ttyname();
68 #ifdef LIBC_H_WITH_UNISTD_H
72 #include <sys/types.h>
82 #ifdef HAVE_WINSOCK2_H
87 /* Some defines for Windows here. */
89 # define pipe(fd) _pipe (fd, 256, O_BINARY)
90 #endif /* __MINGW32__ */
93 # include <sys/wait.h>
96 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
99 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
107 #ifdef HAVE_SYS_UTSNAME_H
108 #include <sys/utsname.h>
111 #ifdef HAVE_SETLOCALE
115 #if (defined HAVE_NEWLOCALE) && (defined HAVE_STRCOLL_L)
116 # define USE_GNU_LOCALE_API
119 #if (defined USE_GNU_LOCALE_API) && (defined HAVE_XLOCALE_H)
120 # include <xlocale.h>
128 #include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
131 #ifdef HAVE_SYS_PARAM_H
132 #include <sys/param.h> /* for MAXHOSTNAMELEN */
135 #if HAVE_SYS_RESOURCE_H
136 # include <sys/resource.h>
139 #include <sys/file.h> /* from Gnulib */
141 /* Some Unix systems don't define these. CPP hair is dangerous, but
142 this seems safe enough... */
159 /* No prototype for this on Solaris 10. The man page says it's in
160 <unistd.h> ... but it lies. */
161 #if ! HAVE_DECL_SETHOSTNAME
162 int sethostname (char *name
, size_t namelen
);
165 /* On NextStep, <utime.h> doesn't define struct utime, unless we
166 #define _POSIX_SOURCE before #including it. I think this is less
167 of a kludge than defining struct utimbuf ourselves. */
168 #ifdef UTIMBUF_NEEDS_POSIX
169 #define _POSIX_SOURCE
172 #ifdef HAVE_SYS_UTIME_H
173 #include <sys/utime.h>
180 /* Please don't add any more #includes or #defines here. The hack
181 above means that _POSIX_SOURCE may be #defined, which will
182 encourage header files to do strange things.
184 FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
186 FIXME: Probably should do all the includes first, then all the fallback
187 declarations and defines, in case things are not in the header we
195 /* Two often used patterns
198 #define WITH_STRING(str,cstr,code) \
200 char *cstr = scm_to_locale_string (str); \
205 #define STRING_SYSCALL(str,cstr,code) \
208 char *cstr = scm_to_locale_string (str); \
209 SCM_SYSCALL (code); \
210 eno = errno; free (cstr); errno = eno; \
215 SCM_SYMBOL (sym_read_pipe
, "read pipe");
216 SCM_SYMBOL (sym_write_pipe
, "write pipe");
218 SCM_DEFINE (scm_pipe
, "pipe", 0, 0, 0,
220 "Return a newly created pipe: a pair of ports which are linked\n"
221 "together on the local machine. The @emph{car} is the input\n"
222 "port and the @emph{cdr} is the output port. Data written (and\n"
223 "flushed) to the output port can be read from the input port.\n"
224 "Pipes are commonly used for communication with a newly forked\n"
225 "child process. The need to flush the output port can be\n"
226 "avoided by making it unbuffered using @code{setvbuf}.\n"
228 "Writes occur atomically provided the size of the data in bytes\n"
229 "is not greater than the value of @code{PIPE_BUF}. Note that\n"
230 "the output port is likely to block if too much data (typically\n"
231 "equal to @code{PIPE_BUF}) has been written but not yet read\n"
232 "from the input port.")
233 #define FUNC_NAME s_scm_pipe
242 p_rd
= scm_fdes_to_port (fd
[0], "r", sym_read_pipe
);
243 p_wt
= scm_fdes_to_port (fd
[1], "w", sym_write_pipe
);
244 return scm_cons (p_rd
, p_wt
);
249 #ifdef HAVE_GETGROUPS
250 SCM_DEFINE (scm_getgroups
, "getgroups", 0, 0, 0,
252 "Return a vector of integers representing the current\n"
253 "supplementary group IDs.")
254 #define FUNC_NAME s_scm_getgroups
261 ngroups
= getgroups (0, NULL
);
265 size
= ngroups
* sizeof (GETGROUPS_T
);
266 groups
= scm_malloc (size
);
267 ngroups
= getgroups (ngroups
, groups
);
269 result
= scm_c_make_vector (ngroups
, SCM_BOOL_F
);
270 while (--ngroups
>= 0)
271 SCM_SIMPLE_VECTOR_SET (result
, ngroups
, scm_from_ulong (groups
[ngroups
]));
279 #ifdef HAVE_SETGROUPS
280 SCM_DEFINE (scm_setgroups
, "setgroups", 1, 0, 0,
282 "Set the current set of supplementary group IDs to the integers\n"
283 "in the given vector @var{vec}. The return value is\n"
286 "Generally only the superuser can set the process group IDs.")
287 #define FUNC_NAME s_scm_setgroups
296 SCM_VALIDATE_VECTOR (SCM_ARG1
, group_vec
);
298 ngroups
= SCM_SIMPLE_VECTOR_LENGTH (group_vec
);
300 /* validate before allocating, so we don't have to worry about leaks */
301 for (i
= 0; i
< ngroups
; i
++)
303 unsigned long ulong_gid
;
305 SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
),
308 if (gid
!= ulong_gid
)
309 SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
312 size
= ngroups
* sizeof (GETGROUPS_T
);
313 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
314 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
315 groups
= scm_malloc (size
);
316 for(i
= 0; i
< ngroups
; i
++)
317 groups
[i
] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
319 result
= setgroups (ngroups
, groups
);
320 save_errno
= errno
; /* don't let free() touch errno */
325 return SCM_UNSPECIFIED
;
331 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
333 "Look up an entry in the user database. @var{obj} can be an integer,\n"
334 "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
335 "or getpwent respectively.")
336 #define FUNC_NAME s_scm_getpwuid
338 struct passwd
*entry
;
340 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
341 if (SCM_UNBNDP (user
) || scm_is_false (user
))
343 SCM_SYSCALL (entry
= getpwent ());
349 else if (scm_is_integer (user
))
351 entry
= getpwuid (scm_to_int (user
));
355 WITH_STRING (user
, c_user
,
356 entry
= getpwnam (c_user
));
359 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
361 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
362 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
363 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
364 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
365 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
367 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (""));
369 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
370 if (!entry
->pw_shell
)
371 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (""));
373 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
377 #endif /* HAVE_GETPWENT */
381 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
383 "If called with a true argument, initialize or reset the password data\n"
384 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
385 "@code{endpwent} procedures are implemented on top of this.")
386 #define FUNC_NAME s_scm_setpwent
388 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
392 return SCM_UNSPECIFIED
;
399 /* Combines getgrgid and getgrnam. */
400 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
402 "Look up an entry in the group database. @var{obj} can be an integer,\n"
403 "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
404 "or getgrent respectively.")
405 #define FUNC_NAME s_scm_getgrgid
408 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
410 if (SCM_UNBNDP (name
) || scm_is_false (name
))
412 SCM_SYSCALL (entry
= getgrent ());
418 else if (scm_is_integer (name
))
419 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
421 STRING_SYSCALL (name
, c_name
,
422 entry
= getgrnam (c_name
));
426 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
427 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
428 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
429 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
436 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
438 "If called with a true argument, initialize or reset the group data\n"
439 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
440 "@code{endgrent} procedures are implemented on top of this.")
441 #define FUNC_NAME s_scm_setgrent
443 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
447 return SCM_UNSPECIFIED
;
450 #endif /* HAVE_GETGRENT */
453 #ifdef HAVE_GETRLIMIT
455 SCM_SYMBOL (sym_as
, "as");
458 SCM_SYMBOL (sym_core
, "core");
461 SCM_SYMBOL (sym_cpu
, "cpu");
464 SCM_SYMBOL (sym_data
, "data");
467 SCM_SYMBOL (sym_fsize
, "fsize");
469 #ifdef RLIMIT_MEMLOCK
470 SCM_SYMBOL (sym_memlock
, "memlock");
472 #ifdef RLIMIT_MSGQUEUE
473 SCM_SYMBOL (sym_msgqueue
, "msgqueue");
476 SCM_SYMBOL (sym_nice
, "nice");
479 SCM_SYMBOL (sym_nofile
, "nofile");
482 SCM_SYMBOL (sym_nproc
, "nproc");
485 SCM_SYMBOL (sym_rss
, "rss");
488 SCM_SYMBOL (sym_rtprio
, "rtprio");
491 SCM_SYMBOL (sym_rttime
, "rttime");
493 #ifdef RLIMIT_SIGPENDING
494 SCM_SYMBOL (sym_sigpending
, "sigpending");
497 SCM_SYMBOL (sym_stack
, "stack");
501 scm_to_resource (SCM s
, const char *func
, int pos
)
503 if (scm_is_number (s
))
504 return scm_to_int (s
);
506 SCM_ASSERT_TYPE (scm_is_symbol (s
), s
, pos
, func
, "symbol");
528 #ifdef RLIMIT_MEMLOCK
529 if (s
== sym_memlock
)
530 return RLIMIT_MEMLOCK
;
532 #ifdef RLIMIT_MSGQUEUE
533 if (s
== sym_msgqueue
)
534 return RLIMIT_MSGQUEUE
;
542 return RLIMIT_NOFILE
;
554 return RLIMIT_RTPRIO
;
558 return RLIMIT_RTPRIO
;
560 #ifdef RLIMIT_SIGPENDING
561 if (s
== sym_sigpending
)
562 return RLIMIT_SIGPENDING
;
569 scm_misc_error (func
, "invalid rlimit resource ~A", scm_list_1 (s
));
573 SCM_DEFINE (scm_getrlimit
, "getrlimit", 1, 0, 0,
575 "Get a resource limit for this process. @var{resource} identifies the resource,\n"
576 "either as an integer or as a symbol. For example, @code{(getrlimit 'stack)}\n"
577 "gets the limits associated with @code{RLIMIT_STACK}.\n\n"
578 "@code{getrlimit} returns two values, the soft and the hard limit. If no\n"
579 "limit is set for the resource in question, the returned limit will be @code{#f}.")
580 #define FUNC_NAME s_scm_getrlimit
583 struct rlimit lim
= { 0, 0 };
585 iresource
= scm_to_resource (resource
, FUNC_NAME
, 1);
587 if (getrlimit (iresource
, &lim
) != 0)
588 scm_syserror (FUNC_NAME
);
590 return scm_values (scm_list_2 ((lim
.rlim_cur
== RLIM_INFINITY
) ? SCM_BOOL_F
591 : scm_from_long (lim
.rlim_cur
),
592 (lim
.rlim_max
== RLIM_INFINITY
) ? SCM_BOOL_F
593 : scm_from_long (lim
.rlim_max
)));
598 #ifdef HAVE_SETRLIMIT
599 SCM_DEFINE (scm_setrlimit
, "setrlimit", 3, 0, 0,
600 (SCM resource
, SCM soft
, SCM hard
),
601 "Set a resource limit for this process. @var{resource} identifies the resource,\n"
602 "either as an integer or as a symbol. @var{soft} and @var{hard} should be integers,\n"
603 "or @code{#f} to indicate no limit (i.e., @code{RLIM_INFINITY}).\n\n"
604 "For example, @code{(setrlimit 'stack 150000 300000)} sets the @code{RLIMIT_STACK}\n"
605 "limit to 150 kilobytes, with a hard limit of 300 kB.")
606 #define FUNC_NAME s_scm_setrlimit
609 struct rlimit lim
= { 0, 0 };
611 iresource
= scm_to_resource (resource
, FUNC_NAME
, 1);
613 lim
.rlim_cur
= (soft
== SCM_BOOL_F
) ? RLIM_INFINITY
: scm_to_long (soft
);
614 lim
.rlim_max
= (hard
== SCM_BOOL_F
) ? RLIM_INFINITY
: scm_to_long (hard
);
616 if (setrlimit (iresource
, &lim
) != 0)
617 scm_syserror (FUNC_NAME
);
619 return SCM_UNSPECIFIED
;
622 #endif /* HAVE_SETRLIMIT */
623 #endif /* HAVE_GETRLIMIT */
626 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
628 "Sends a signal to the specified process or group of processes.\n\n"
629 "@var{pid} specifies the processes to which the signal is sent:\n\n"
631 "@item @var{pid} greater than 0\n"
632 "The process whose identifier is @var{pid}.\n"
633 "@item @var{pid} equal to 0\n"
634 "All processes in the current process group.\n"
635 "@item @var{pid} less than -1\n"
636 "The process group whose identifier is -@var{pid}\n"
637 "@item @var{pid} equal to -1\n"
638 "If the process is privileged, all processes except for some special\n"
639 "system processes. Otherwise, all processes with the current effective\n"
642 "@var{sig} should be specified using a variable corresponding to\n"
643 "the Unix symbolic name, e.g.,\n\n"
648 "Interrupt signal.\n"
650 #define FUNC_NAME s_scm_kill
652 /* Signal values are interned in scm_init_posix(). */
654 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
657 /* Mingw has raise(), but not kill(). (Other raw DOS environments might
658 be similar.) Use raise() when the requested pid is our own process,
660 if (scm_to_int (pid
) == getpid ())
662 if (raise (scm_to_int (sig
)) != 0)
674 return SCM_UNSPECIFIED
;
679 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
680 (SCM pid
, SCM options
),
681 "This procedure collects status information from a child process which\n"
682 "has terminated or (optionally) stopped. Normally it will\n"
683 "suspend the calling process until this can be done. If more than one\n"
684 "child process is eligible then one will be chosen by the operating system.\n\n"
685 "The value of @var{pid} determines the behaviour:\n\n"
687 "@item @var{pid} greater than 0\n"
688 "Request status information from the specified child process.\n"
689 "@item @var{pid} equal to -1 or WAIT_ANY\n"
690 "Request status information for any child process.\n"
691 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
692 "Request status information for any child process in the current process\n"
694 "@item @var{pid} less than -1\n"
695 "Request status information for any child process whose process group ID\n"
698 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
699 "values of zero or more of the following variables:\n\n"
701 "Return immediately even if there are no child processes to be collected.\n"
703 "@defvar WUNTRACED\n"
704 "Report status information for stopped processes as well as terminated\n"
707 "The return value is a pair containing:\n\n"
710 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
711 "specified and no process was collected.\n"
713 "The integer status value.\n"
715 #define FUNC_NAME s_scm_waitpid
720 if (SCM_UNBNDP (options
))
724 /* Flags are interned in scm_init_posix. */
725 ioptions
= scm_to_int (options
);
727 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
730 return scm_cons (scm_from_int (i
), scm_from_int (status
));
733 #endif /* HAVE_WAITPID */
736 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
738 "Return the exit status value, as would be set if a process\n"
739 "ended normally through a call to @code{exit} or @code{_exit},\n"
740 "if any, otherwise @code{#f}.")
741 #define FUNC_NAME s_scm_status_exit_val
745 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
747 lstatus
= scm_to_int (status
);
748 if (WIFEXITED (lstatus
))
749 return (scm_from_int (WEXITSTATUS (lstatus
)));
755 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
757 "Return the signal number which terminated the process, if any,\n"
758 "otherwise @code{#f}.")
759 #define FUNC_NAME s_scm_status_term_sig
763 lstatus
= scm_to_int (status
);
764 if (WIFSIGNALED (lstatus
))
765 return scm_from_int (WTERMSIG (lstatus
));
771 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
773 "Return the signal number which stopped the process, if any,\n"
774 "otherwise @code{#f}.")
775 #define FUNC_NAME s_scm_status_stop_sig
779 lstatus
= scm_to_int (status
);
780 if (WIFSTOPPED (lstatus
))
781 return scm_from_int (WSTOPSIG (lstatus
));
786 #endif /* __MINGW32__ */
789 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
791 "Return an integer representing the process ID of the parent\n"
793 #define FUNC_NAME s_scm_getppid
795 return scm_from_int (getppid ());
798 #endif /* HAVE_GETPPID */
802 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
804 "Return an integer representing the current real user ID.")
805 #define FUNC_NAME s_scm_getuid
807 return scm_from_int (getuid ());
813 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
815 "Return an integer representing the current real group ID.")
816 #define FUNC_NAME s_scm_getgid
818 return scm_from_int (getgid ());
824 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
826 "Return an integer representing the current effective user ID.\n"
827 "If the system does not support effective IDs, then the real ID\n"
828 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
829 "system supports effective IDs.")
830 #define FUNC_NAME s_scm_geteuid
833 return scm_from_int (geteuid ());
835 return scm_from_int (getuid ());
841 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
843 "Return an integer representing the current effective group ID.\n"
844 "If the system does not support effective IDs, then the real ID\n"
845 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
846 "system supports effective IDs.")
847 #define FUNC_NAME s_scm_getegid
850 return scm_from_int (getegid ());
852 return scm_from_int (getgid ());
858 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
860 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
861 "the process has appropriate privileges.\n"
862 "The return value is unspecified.")
863 #define FUNC_NAME s_scm_setuid
865 if (setuid (scm_to_int (id
)) != 0)
867 return SCM_UNSPECIFIED
;
871 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
873 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
874 "the process has appropriate privileges.\n"
875 "The return value is unspecified.")
876 #define FUNC_NAME s_scm_setgid
878 if (setgid (scm_to_int (id
)) != 0)
880 return SCM_UNSPECIFIED
;
884 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
886 "Sets the effective user ID to the integer @var{id}, provided the process\n"
887 "has appropriate privileges. If effective IDs are not supported, the\n"
888 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
889 "system supports effective IDs.\n"
890 "The return value is unspecified.")
891 #define FUNC_NAME s_scm_seteuid
896 rv
= seteuid (scm_to_int (id
));
898 rv
= setuid (scm_to_int (id
));
902 return SCM_UNSPECIFIED
;
905 #endif /* __MINGW32__ */
909 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
911 "Sets the effective group ID to the integer @var{id}, provided the process\n"
912 "has appropriate privileges. If effective IDs are not supported, the\n"
913 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
914 "system supports effective IDs.\n"
915 "The return value is unspecified.")
916 #define FUNC_NAME s_scm_setegid
921 rv
= setegid (scm_to_int (id
));
923 rv
= setgid (scm_to_int (id
));
927 return SCM_UNSPECIFIED
;
935 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
937 "Return an integer representing the current process group ID.\n"
938 "This is the POSIX definition, not BSD.")
939 #define FUNC_NAME s_scm_getpgrp
942 fn
= (int (*) ()) getpgrp
;
943 return scm_from_int (fn (0));
946 #endif /* HAVE_GETPGRP */
950 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
952 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
953 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
955 "Fails on systems that do not support job control.\n"
956 "The return value is unspecified.")
957 #define FUNC_NAME s_scm_setpgid
959 /* FIXME(?): may be known as setpgrp. */
960 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
962 return SCM_UNSPECIFIED
;
965 #endif /* HAVE_SETPGID */
968 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
970 "Creates a new session. The current process becomes the session leader\n"
971 "and is put in a new process group. The process will be detached\n"
972 "from its controlling terminal if it has one.\n"
973 "The return value is an integer representing the new process group ID.")
974 #define FUNC_NAME s_scm_setsid
976 pid_t sid
= setsid ();
979 return SCM_UNSPECIFIED
;
982 #endif /* HAVE_SETSID */
985 /* ttyname returns its result in a single static buffer, hence
986 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
987 continuously calling ttyname will otherwise get an overwrite quite
990 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
991 there's probably little to be gained in either speed or parallelism. */
994 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
996 "Return a string with the name of the serial terminal device\n"
997 "underlying @var{port}.")
998 #define FUNC_NAME s_scm_ttyname
1002 SCM ret
= SCM_BOOL_F
;
1004 port
= SCM_COERCE_OUTPORT (port
);
1005 SCM_VALIDATE_OPPORT (1, port
);
1006 if (!SCM_FPORTP (port
))
1008 fd
= SCM_FPORT_FDES (port
);
1010 scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex
);
1012 SCM_SYSCALL (result
= ttyname (fd
));
1015 result
= strdup (result
);
1017 scm_i_pthread_mutex_unlock (&scm_i_misc_mutex
);
1025 ret
= scm_take_locale_string (result
);
1030 #endif /* HAVE_TTYNAME */
1033 /* For thread safety "buf" is used instead of NULL for the ctermid static
1034 buffer. Actually it's unlikely the controlling terminal will change
1035 during program execution, and indeed on glibc (2.3.2) it's always just
1036 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
1037 safety everywhere. */
1039 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
1041 "Return a string containing the file name of the controlling\n"
1042 "terminal for the current process.")
1043 #define FUNC_NAME s_scm_ctermid
1045 char buf
[L_ctermid
];
1046 char *result
= ctermid (buf
);
1047 if (*result
== '\0')
1049 return scm_from_locale_string (result
);
1052 #endif /* HAVE_CTERMID */
1054 #ifdef HAVE_TCGETPGRP
1055 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
1057 "Return the process group ID of the foreground process group\n"
1058 "associated with the terminal open on the file descriptor\n"
1059 "underlying @var{port}.\n"
1061 "If there is no foreground process group, the return value is a\n"
1062 "number greater than 1 that does not match the process group ID\n"
1063 "of any existing process group. This can happen if all of the\n"
1064 "processes in the job that was formerly the foreground job have\n"
1065 "terminated, and no other job has yet been moved into the\n"
1067 #define FUNC_NAME s_scm_tcgetpgrp
1072 port
= SCM_COERCE_OUTPORT (port
);
1074 SCM_VALIDATE_OPFPORT (1, port
);
1075 fd
= SCM_FPORT_FDES (port
);
1076 if ((pgid
= tcgetpgrp (fd
)) == -1)
1078 return scm_from_int (pgid
);
1081 #endif /* HAVE_TCGETPGRP */
1083 #ifdef HAVE_TCSETPGRP
1084 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
1085 (SCM port
, SCM pgid
),
1086 "Set the foreground process group ID for the terminal used by the file\n"
1087 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
1088 "The calling process\n"
1089 "must be a member of the same session as @var{pgid} and must have the same\n"
1090 "controlling terminal. The return value is unspecified.")
1091 #define FUNC_NAME s_scm_tcsetpgrp
1095 port
= SCM_COERCE_OUTPORT (port
);
1097 SCM_VALIDATE_OPFPORT (1, port
);
1098 fd
= SCM_FPORT_FDES (port
);
1099 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
1101 return SCM_UNSPECIFIED
;
1104 #endif /* HAVE_TCSETPGRP */
1107 free_string_pointers (void *data
)
1109 scm_i_free_string_pointers ((char **)data
);
1112 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
1113 (SCM filename
, SCM args
),
1114 "Executes the file named by @var{path} as a new process image.\n"
1115 "The remaining arguments are supplied to the process; from a C program\n"
1116 "they are accessible as the @code{argv} argument to @code{main}.\n"
1117 "Conventionally the first @var{arg} is the same as @var{path}.\n"
1118 "All arguments must be strings.\n\n"
1119 "If @var{arg} is missing, @var{path} is executed with a null\n"
1120 "argument list, which may have system-dependent side-effects.\n\n"
1121 "This procedure is currently implemented using the @code{execv} system\n"
1122 "call, but we call it @code{execl} because of its Scheme calling interface.")
1123 #define FUNC_NAME s_scm_execl
1128 scm_dynwind_begin (0);
1130 exec_file
= scm_to_locale_string (filename
);
1131 scm_dynwind_free (exec_file
);
1133 exec_argv
= scm_i_allocate_string_pointers (args
);
1134 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
1135 SCM_F_WIND_EXPLICITLY
);
1139 /* extra "const" in mingw formals, provokes warning from gcc */
1140 (const char * const *)
1151 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
1152 (SCM filename
, SCM args
),
1153 "Similar to @code{execl}, however if\n"
1154 "@var{filename} does not contain a slash\n"
1155 "then the file to execute will be located by searching the\n"
1156 "directories listed in the @code{PATH} environment variable.\n\n"
1157 "This procedure is currently implemented using the @code{execvp} system\n"
1158 "call, but we call it @code{execlp} because of its Scheme calling interface.")
1159 #define FUNC_NAME s_scm_execlp
1164 scm_dynwind_begin (0);
1166 exec_file
= scm_to_locale_string (filename
);
1167 scm_dynwind_free (exec_file
);
1169 exec_argv
= scm_i_allocate_string_pointers (args
);
1170 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
1171 SCM_F_WIND_EXPLICITLY
);
1175 /* extra "const" in mingw formals, provokes warning from gcc */
1176 (const char * const *)
1188 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
1189 list strings the way environ_list_to_c gives. */
1191 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
1192 (SCM filename
, SCM env
, SCM args
),
1193 "Similar to @code{execl}, but the environment of the new process is\n"
1194 "specified by @var{env}, which must be a list of strings as returned by the\n"
1195 "@code{environ} procedure.\n\n"
1196 "This procedure is currently implemented using the @code{execve} system\n"
1197 "call, but we call it @code{execle} because of its Scheme calling interface.")
1198 #define FUNC_NAME s_scm_execle
1204 scm_dynwind_begin (0);
1206 exec_file
= scm_to_locale_string (filename
);
1207 scm_dynwind_free (exec_file
);
1209 exec_argv
= scm_i_allocate_string_pointers (args
);
1210 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
1211 SCM_F_WIND_EXPLICITLY
);
1213 exec_env
= scm_i_allocate_string_pointers (env
);
1214 scm_dynwind_unwind_handler (free_string_pointers
, exec_env
,
1215 SCM_F_WIND_EXPLICITLY
);
1219 /* extra "const" in mingw formals, provokes warning from gcc */
1220 (const char * const *)
1224 /* extra "const" in mingw formals, provokes warning from gcc */
1225 (const char * const *)
1237 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1239 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1240 "In the child the return value is 0. In the parent the return value is\n"
1241 "the integer process ID of the child.\n\n"
1242 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1243 "with the scsh fork.")
1244 #define FUNC_NAME s_scm_fork
1250 return scm_from_int (pid
);
1253 #endif /* HAVE_FORK */
1256 # include "win32-uname.h"
1259 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1260 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1262 "Return an object with some information about the computer\n"
1263 "system the program is running on.")
1264 #define FUNC_NAME s_scm_uname
1267 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1268 if (uname (&buf
) < 0)
1270 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1271 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1272 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1273 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1274 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1277 SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1282 #endif /* HAVE_UNAME */
1284 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1286 "If @var{env} is omitted, return the current environment (in the\n"
1287 "Unix sense) as a list of strings. Otherwise set the current\n"
1288 "environment, which is also the default environment for child\n"
1289 "processes, to the supplied list of strings. Each member of\n"
1290 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1291 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1292 "then the return value is unspecified.")
1293 #define FUNC_NAME s_scm_environ
1295 if (SCM_UNBNDP (env
))
1296 return scm_makfromstrs (-1, environ
);
1301 new_environ
= scm_i_allocate_string_pointers (env
);
1302 /* Free the old environment, except when called for the first
1306 static int first
= 1;
1308 scm_i_free_string_pointers (environ
);
1311 environ
= new_environ
;
1312 return SCM_UNSPECIFIED
;
1319 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1321 "Return a name in the file system that does not match any\n"
1322 "existing file. However there is no guarantee that another\n"
1323 "process will not create the file after @code{tmpnam} is called.\n"
1324 "Care should be taken if opening the file, e.g., use the\n"
1325 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1326 #define FUNC_NAME s_scm_tmpnam
1328 char name
[L_tmpnam
];
1331 SCM_SYSCALL (rv
= tmpnam (name
));
1333 /* not SCM_SYSERROR since errno probably not set. */
1334 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1335 return scm_from_locale_string (name
);
1341 #ifndef HAVE_MKSTEMP
1342 extern int mkstemp (char *);
1345 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1347 "Create a new unique file in the file system and return a new\n"
1348 "buffered port open for reading and writing to the file.\n"
1350 "@var{tmpl} is a string specifying where the file should be\n"
1351 "created: it must end with @samp{XXXXXX} and those @samp{X}s\n"
1352 "will be changed in the string to return the name of the file.\n"
1353 "(@code{port-filename} on the port also gives the name.)\n"
1355 "POSIX doesn't specify the permissions mode of the file, on GNU\n"
1356 "and most systems it's @code{#o600}. An application can use\n"
1357 "@code{chmod} to relax that if desired. For example\n"
1358 "@code{#o666} less @code{umask}, which is usual for ordinary\n"
1362 "(let ((port (mkstemp! (string-copy \"/tmp/myfile-XXXXXX\"))))\n"
1363 " (chmod port (logand #o666 (lognot (umask))))\n"
1366 #define FUNC_NAME s_scm_mkstemp
1371 scm_dynwind_begin (0);
1373 c_tmpl
= scm_to_locale_string (tmpl
);
1374 scm_dynwind_free (c_tmpl
);
1376 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1380 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1381 SCM_INUM0
, scm_string_length (tmpl
),
1385 return scm_fdes_to_port (rv
, "w+", tmpl
);
1389 SCM_DEFINE (scm_utime
, "utime", 1, 2, 0,
1390 (SCM pathname
, SCM actime
, SCM modtime
),
1391 "@code{utime} sets the access and modification times for the\n"
1392 "file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1393 "not supplied, then the current time is used. @var{actime} and\n"
1394 "@var{modtime} must be integer time values as returned by the\n"
1395 "@code{current-time} procedure.\n"
1397 "(utime \"foo\" (- (current-time) 3600))\n"
1399 "will set the access time to one hour in the past and the\n"
1400 "modification time to the current time.")
1401 #define FUNC_NAME s_scm_utime
1404 struct utimbuf utm_tmp
;
1406 if (SCM_UNBNDP (actime
))
1407 SCM_SYSCALL (time (&utm_tmp
.actime
));
1409 utm_tmp
.actime
= SCM_NUM2ULONG (2, actime
);
1411 if (SCM_UNBNDP (modtime
))
1412 SCM_SYSCALL (time (&utm_tmp
.modtime
));
1414 utm_tmp
.modtime
= SCM_NUM2ULONG (3, modtime
);
1416 STRING_SYSCALL (pathname
, c_pathname
,
1417 rv
= utime (c_pathname
, &utm_tmp
));
1420 return SCM_UNSPECIFIED
;
1424 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1425 (SCM path
, SCM how
),
1426 "Test accessibility of a file under the real UID and GID of the\n"
1427 "calling process. The return is @code{#t} if @var{path} exists\n"
1428 "and the permissions requested by @var{how} are all allowed, or\n"
1429 "@code{#f} if not.\n"
1431 "@var{how} is an integer which is one of the following values,\n"
1432 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1435 "Test for read permission.\n"
1438 "Test for write permission.\n"
1441 "Test for execute permission.\n"
1444 "Test for existence of the file. This is implied by each of the\n"
1445 "other tests, so there's no need to combine it with them.\n"
1448 "It's important to note that @code{access?} does not simply\n"
1449 "indicate what will happen on attempting to read or write a\n"
1450 "file. In normal circumstances it does, but in a set-UID or\n"
1451 "set-GID program it doesn't because @code{access?} tests the\n"
1452 "real ID, whereas an open or execute attempt uses the effective\n"
1455 "A program which will never run set-UID/GID can ignore the\n"
1456 "difference between real and effective IDs, but for maximum\n"
1457 "generality, especially in library functions, it's best not to\n"
1458 "use @code{access?} to predict the result of an open or execute,\n"
1459 "instead simply attempt that and catch any exception.\n"
1461 "The main use for @code{access?} is to let a set-UID/GID program\n"
1462 "determine what the invoking user would have been allowed to do,\n"
1463 "without the greater (or perhaps lesser) privileges afforded by\n"
1464 "the effective ID. For more on this, see ``Testing File\n"
1465 "Access'' in The GNU C Library Reference Manual.")
1466 #define FUNC_NAME s_scm_access
1470 WITH_STRING (path
, c_path
,
1471 rv
= access (c_path
, scm_to_int (how
)));
1472 return scm_from_bool (!rv
);
1476 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1478 "Return an integer representing the current process ID.")
1479 #define FUNC_NAME s_scm_getpid
1481 return scm_from_ulong (getpid ());
1485 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1487 "Modifies the environment of the current process, which is\n"
1488 "also the default environment inherited by child processes.\n\n"
1489 "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1490 "directly into the environment, replacing any existing environment string\n"
1492 "name matching @code{NAME}. If @var{string} does not contain an equal\n"
1493 "sign, then any existing string with name matching @var{string} will\n"
1495 "The return value is unspecified.")
1496 #define FUNC_NAME s_scm_putenv
1499 char *c_str
= scm_to_locale_string (str
);
1501 /* Leave C_STR in the environment. */
1503 /* Gnulib's `putenv' module honors the semantics described above. */
1504 rv
= putenv (c_str
);
1508 return SCM_UNSPECIFIED
;
1512 /* This mutex is used to serialize invocations of `setlocale ()' on non-GNU
1513 systems (i.e., systems where a reentrant locale API is not available). It
1514 is also acquired before calls to `nl_langinfo ()'. See `i18n.c' for
1516 scm_i_pthread_mutex_t scm_i_locale_mutex
= SCM_I_PTHREAD_MUTEX_INITIALIZER
;
1518 #ifdef HAVE_SETLOCALE
1520 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1521 (SCM category
, SCM locale
),
1522 "If @var{locale} is omitted, return the current value of the\n"
1523 "specified locale category as a system-dependent string.\n"
1524 "@var{category} should be specified using the values\n"
1525 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1527 "Otherwise the specified locale category is set to the string\n"
1528 "@var{locale} and the new value is returned as a\n"
1529 "system-dependent string. If @var{locale} is an empty string,\n"
1530 "the locale will be set using environment variables.")
1531 #define FUNC_NAME s_scm_setlocale
1537 scm_dynwind_begin (0);
1539 if (SCM_UNBNDP (locale
))
1545 clocale
= scm_to_locale_string (locale
);
1546 scm_dynwind_free (clocale
);
1549 c_category
= scm_i_to_lc_category (category
, 1);
1551 scm_i_pthread_mutex_lock (&scm_i_locale_mutex
);
1552 rv
= setlocale (c_category
, clocale
);
1553 scm_i_pthread_mutex_unlock (&scm_i_locale_mutex
);
1557 /* POSIX and C99 don't say anything about setlocale setting errno, so
1558 force a sensible value here. glibc leaves ENOENT, which would be
1559 fine, but it's not a documented feature. */
1564 /* Recompute the standard SRFI-14 character sets in a locale-dependent
1565 (actually charset-dependent) way. */
1566 scm_srfi_14_compute_char_sets ();
1569 return scm_from_locale_string (rv
);
1572 #endif /* HAVE_SETLOCALE */
1575 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1576 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1577 "Creates a new special file, such as a file corresponding to a device.\n"
1578 "@var{path} specifies the name of the file. @var{type} should\n"
1579 "be one of the following symbols:\n"
1580 "regular, directory, symlink, block-special, char-special,\n"
1581 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1582 "@var{dev} (an integer) specifies which device the special file refers\n"
1583 "to. Its exact interpretation depends on the kind of special file\n"
1584 "being created.\n\n"
1587 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1589 "The return value is unspecified.")
1590 #define FUNC_NAME s_scm_mknod
1596 SCM_VALIDATE_STRING (1, path
);
1597 SCM_VALIDATE_SYMBOL (2, type
);
1599 p
= scm_i_symbol_chars (type
);
1600 if (strcmp (p
, "regular") == 0)
1602 else if (strcmp (p
, "directory") == 0)
1605 /* systems without symlinks probably don't have S_IFLNK defined */
1606 else if (strcmp (p
, "symlink") == 0)
1609 else if (strcmp (p
, "block-special") == 0)
1611 else if (strcmp (p
, "char-special") == 0)
1613 else if (strcmp (p
, "fifo") == 0)
1616 else if (strcmp (p
, "socket") == 0)
1620 SCM_OUT_OF_RANGE (2, type
);
1622 STRING_SYSCALL (path
, c_path
,
1623 val
= mknod (c_path
,
1624 ctype
| scm_to_int (perms
),
1628 return SCM_UNSPECIFIED
;
1631 #endif /* HAVE_MKNOD */
1634 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1636 "Increment the priority of the current process by @var{incr}. A higher\n"
1637 "priority value means that the process runs less often.\n"
1638 "The return value is unspecified.")
1639 #define FUNC_NAME s_scm_nice
1643 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1644 from "prio-NZERO", so an error must be detected from errno changed */
1646 nice_value
= nice (scm_to_int (incr
));
1650 return SCM_UNSPECIFIED
;
1653 #endif /* HAVE_NICE */
1656 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1658 "Flush the operating system disk buffers.\n"
1659 "The return value is unspecified.")
1660 #define FUNC_NAME s_scm_sync
1663 return SCM_UNSPECIFIED
;
1666 #endif /* HAVE_SYNC */
1669 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1670 to avoid another thread overwriting it. A test program running crypt
1671 continuously in two threads can be quickly seen tripping this problem.
1672 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1674 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1675 slower (about 5x) than plain crypt if you pass an uninitialized data
1676 block each time. Presumably there's some one-time setups. The best way
1677 to use crypt_r for parallel execution in multiple threads would probably
1678 be to maintain a little pool of initialized crypt_data structures, take
1679 one and use it, then return it to the pool. That pool could be garbage
1680 collected so it didn't add permanently to memory use if only a few crypt
1681 calls are made. But we expect crypt will be used rarely, and even more
1682 rarely will there be any desire for lots of parallel execution on
1683 multiple cpus. So for now we don't bother with anything fancy, just
1687 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1688 (SCM key
, SCM salt
),
1689 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1690 "crypt(3) library call.")
1691 #define FUNC_NAME s_scm_crypt
1694 char *c_key
, *c_salt
, *c_ret
;
1696 scm_dynwind_begin (0);
1697 scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex
);
1699 c_key
= scm_to_locale_string (key
);
1700 scm_dynwind_free (c_key
);
1701 c_salt
= scm_to_locale_string (salt
);
1702 scm_dynwind_free (c_salt
);
1704 /* The Linux crypt(3) man page says crypt will return NULL and set errno
1705 on error. (Eg. ENOSYS if legal restrictions mean it cannot be
1707 c_ret
= crypt (c_key
, c_salt
);
1711 ret
= scm_from_locale_string (c_ret
);
1716 #endif /* HAVE_CRYPT */
1719 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1721 "Change the root directory to that specified in @var{path}.\n"
1722 "This directory will be used for path names beginning with\n"
1723 "@file{/}. The root directory is inherited by all children\n"
1724 "of the current process. Only the superuser may change the\n"
1726 #define FUNC_NAME s_scm_chroot
1730 WITH_STRING (path
, c_path
,
1731 rv
= chroot (c_path
));
1734 return SCM_UNSPECIFIED
;
1737 #endif /* HAVE_CHROOT */
1741 /* Wrapper function to supplying `getlogin()' under Windows. */
1742 static char * getlogin (void)
1744 static char user
[256];
1745 static unsigned long len
= 256;
1747 if (!GetUserName (user
, &len
))
1751 #endif /* __MINGW32__ */
1754 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1755 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1757 "Return a string containing the name of the user logged in on\n"
1758 "the controlling terminal of the process, or @code{#f} if this\n"
1759 "information cannot be obtained.")
1760 #define FUNC_NAME s_scm_getlogin
1767 return scm_from_locale_string (p
);
1770 #endif /* HAVE_GETLOGIN */
1774 # if !HAVE_DECL_CUSERID
1775 extern char *cuserid (char *);
1778 SCM_DEFINE (scm_cuserid
, "cuserid", 0, 0, 0,
1780 "Return a string containing a user name associated with the\n"
1781 "effective user id of the process. Return @code{#f} if this\n"
1782 "information cannot be obtained.")
1783 #define FUNC_NAME s_scm_cuserid
1785 char buf
[L_cuserid
];
1791 return scm_from_locale_string (p
);
1794 #endif /* HAVE_CUSERID */
1796 #if HAVE_GETPRIORITY
1797 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1798 (SCM which
, SCM who
),
1799 "Return the scheduling priority of the process, process group\n"
1800 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1801 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1802 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1803 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1804 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1805 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1806 "denotes the current process, process group, or user. Return\n"
1807 "the highest priority (lowest numerical value) of any of the\n"
1808 "specified processes.")
1809 #define FUNC_NAME s_scm_getpriority
1811 int cwhich
, cwho
, ret
;
1813 cwhich
= scm_to_int (which
);
1814 cwho
= scm_to_int (who
);
1816 /* We have to clear errno and examine it later, because -1 is a
1817 legal return value for getpriority(). */
1819 ret
= getpriority (cwhich
, cwho
);
1822 return scm_from_int (ret
);
1825 #endif /* HAVE_GETPRIORITY */
1827 #if HAVE_SETPRIORITY
1828 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1829 (SCM which
, SCM who
, SCM prio
),
1830 "Set the scheduling priority of the process, process group\n"
1831 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1832 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1833 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1834 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1835 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1836 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1837 "denotes the current process, process group, or user.\n"
1838 "@var{prio} is a value in the range -20 and 20, the default\n"
1839 "priority is 0; lower priorities cause more favorable\n"
1840 "scheduling. Sets the priority of all of the specified\n"
1841 "processes. Only the super-user may lower priorities.\n"
1842 "The return value is not specified.")
1843 #define FUNC_NAME s_scm_setpriority
1845 int cwhich
, cwho
, cprio
;
1847 cwhich
= scm_to_int (which
);
1848 cwho
= scm_to_int (who
);
1849 cprio
= scm_to_int (prio
);
1851 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1853 return SCM_UNSPECIFIED
;
1856 #endif /* HAVE_SETPRIORITY */
1859 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
1861 "Display @var{prompt} to the standard error output and read\n"
1862 "a password from @file{/dev/tty}. If this file is not\n"
1863 "accessible, it reads from standard input. The password may be\n"
1864 "up to 127 characters in length. Additional characters and the\n"
1865 "terminating newline character are discarded. While reading\n"
1866 "the password, echoing and the generation of signals by special\n"
1867 "characters is disabled.")
1868 #define FUNC_NAME s_scm_getpass
1873 SCM_VALIDATE_STRING (1, prompt
);
1875 WITH_STRING (prompt
, c_prompt
,
1876 p
= getpass(c_prompt
));
1877 passwd
= scm_from_locale_string (p
);
1879 /* Clear out the password in the static buffer. */
1880 memset (p
, 0, strlen (p
));
1885 #endif /* HAVE_GETPASS */
1887 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
1888 (SCM file
, SCM operation
),
1889 "Apply or remove an advisory lock on an open file.\n"
1890 "@var{operation} specifies the action to be done:\n"
1893 "Shared lock. More than one process may hold a shared lock\n"
1894 "for a given file at a given time.\n"
1897 "Exclusive lock. Only one process may hold an exclusive lock\n"
1898 "for a given file at a given time.\n"
1901 "Unlock the file.\n"
1904 "Don't block when locking. This is combined with one of the\n"
1905 "other operations using @code{logior}. If @code{flock} would\n"
1906 "block an @code{EWOULDBLOCK} error is thrown.\n"
1909 "The return value is not specified. @var{file} may be an open\n"
1910 "file descriptor or an open file descriptor port.\n"
1912 "Note that @code{flock} does not lock files across NFS.")
1913 #define FUNC_NAME s_scm_flock
1917 if (scm_is_integer (file
))
1918 fdes
= scm_to_int (file
);
1921 SCM_VALIDATE_OPFPORT (2, file
);
1923 fdes
= SCM_FPORT_FDES (file
);
1925 if (flock (fdes
, scm_to_int (operation
)) == -1)
1927 return SCM_UNSPECIFIED
;
1931 #if HAVE_SETHOSTNAME
1932 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
1934 "Set the host name of the current processor to @var{name}. May\n"
1935 "only be used by the superuser. The return value is not\n"
1937 #define FUNC_NAME s_scm_sethostname
1941 WITH_STRING (name
, c_name
,
1942 rv
= sethostname (c_name
, strlen(c_name
)));
1945 return SCM_UNSPECIFIED
;
1948 #endif /* HAVE_SETHOSTNAME */
1951 #if HAVE_GETHOSTNAME
1952 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
1954 "Return the host name of the current processor.")
1955 #define FUNC_NAME s_scm_gethostname
1957 #ifdef MAXHOSTNAMELEN
1959 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
1960 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
1961 const int len
= MAXHOSTNAMELEN
+ 1;
1962 char *const p
= scm_malloc (len
);
1963 const int res
= gethostname (p
, len
);
1965 scm_dynwind_begin (0);
1966 scm_dynwind_unwind_handler (free
, p
, 0);
1970 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
1971 * large enough. SUSv2 specifies 255 maximum too, apparently. */
1976 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
1978 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
1979 * which may reflect a particular kernel configuration.
1980 * Must watch out for this existing but giving -1, as happens for instance
1981 * in gnu/linux glibc 2.3.2. */
1983 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
1990 p
= scm_malloc (len
);
1992 scm_dynwind_begin (0);
1993 scm_dynwind_unwind_handler (free
, p
, 0);
1995 res
= gethostname (p
, len
);
1996 while (res
== -1 && errno
== ENAMETOOLONG
)
2000 /* scm_realloc may throw an exception. */
2001 p
= scm_realloc (p
, len
);
2002 res
= gethostname (p
, len
);
2009 const int save_errno
= errno
;
2011 /* No guile exceptions can occur before we have freed p's memory. */
2020 /* scm_from_locale_string may throw an exception. */
2021 const SCM name
= scm_from_locale_string (p
);
2023 /* No guile exceptions can occur before we have freed p's memory. */
2031 #endif /* HAVE_GETHOSTNAME */
2037 scm_add_feature ("posix");
2039 scm_add_feature ("EIDs");
2042 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
2045 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
2048 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
2051 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
2054 /* access() symbols. */
2055 scm_c_define ("R_OK", scm_from_int (R_OK
));
2056 scm_c_define ("W_OK", scm_from_int (W_OK
));
2057 scm_c_define ("X_OK", scm_from_int (X_OK
));
2058 scm_c_define ("F_OK", scm_from_int (F_OK
));
2061 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
2064 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
2067 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
2070 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
2073 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
2076 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
2079 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
2082 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
2085 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
2088 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
2091 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
2093 #ifdef LC_MEASUREMENT
2094 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
2096 #ifdef LC_IDENTIFICATION
2097 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
2100 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
2104 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
2107 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
2110 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
2114 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
2117 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
2120 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
2123 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
2126 #include "libguile/cpp_sig_symbols.c"
2127 #include "libguile/posix.x"