1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 License
5 * as published by the Free Software Foundation; either version 3 of
6 * the License, or (at your option) any later version.
8 * This library is distributed in the hope that it will be useful, but
9 * 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
34 #include "libguile/_scm.h"
35 #include "libguile/dynwind.h"
36 #include "libguile/fports.h"
37 #include "libguile/scmsigs.h"
38 #include "libguile/feature.h"
39 #include "libguile/strings.h"
40 #include "libguile/srfi-13.h"
41 #include "libguile/srfi-14.h"
42 #include "libguile/vectors.h"
43 #include "libguile/values.h"
45 #include "libguile/validate.h"
46 #include "libguile/posix.h"
47 #include "libguile/gettext.h"
48 #include "libguile/threads.h"
54 #ifdef TIME_WITH_SYS_TIME
55 # include <sys/time.h>
59 # include <sys/time.h>
69 extern char *ttyname();
73 #ifdef LIBC_H_WITH_UNISTD_H
77 #include <sys/types.h>
87 #ifdef HAVE_WINSOCK2_H
92 /* Some defines for Windows here. */
94 # define pipe(fd) _pipe (fd, 256, O_BINARY)
95 #endif /* __MINGW32__ */
98 # include <sys/wait.h>
101 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
104 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
112 #ifdef HAVE_SYS_UTSNAME_H
113 #include <sys/utsname.h>
116 #ifdef HAVE_SETLOCALE
120 #if (defined HAVE_NEWLOCALE) && (defined HAVE_STRCOLL_L)
121 # define USE_GNU_LOCALE_API
124 #if (defined USE_GNU_LOCALE_API) && (defined HAVE_XLOCALE_H)
125 # include <xlocale.h>
133 #include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
136 #ifdef HAVE_SYS_PARAM_H
137 #include <sys/param.h> /* for MAXHOSTNAMELEN */
140 #if HAVE_SYS_RESOURCE_H
141 # include <sys/resource.h>
144 #include <sys/file.h> /* from Gnulib */
147 /* Some Unix systems don't define these. CPP hair is dangerous, but
148 this seems safe enough... */
165 /* No prototype for this on Solaris 10. The man page says it's in
166 <unistd.h> ... but it lies. */
167 #if ! HAVE_DECL_SETHOSTNAME
168 int sethostname (char *name
, size_t namelen
);
171 /* On NextStep, <utime.h> doesn't define struct utime, unless we
172 #define _POSIX_SOURCE before #including it. I think this is less
173 of a kludge than defining struct utimbuf ourselves. */
174 #ifdef UTIMBUF_NEEDS_POSIX
175 #define _POSIX_SOURCE
178 #ifdef HAVE_SYS_UTIME_H
179 #include <sys/utime.h>
186 /* Please don't add any more #includes or #defines here. The hack
187 above means that _POSIX_SOURCE may be #defined, which will
188 encourage header files to do strange things.
190 FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
192 FIXME: Probably should do all the includes first, then all the fallback
193 declarations and defines, in case things are not in the header we
201 /* Two often used patterns
204 #define WITH_STRING(str,cstr,code) \
206 char *cstr = scm_to_locale_string (str); \
211 #define STRING_SYSCALL(str,cstr,code) \
214 char *cstr = scm_to_locale_string (str); \
215 SCM_SYSCALL (code); \
216 eno = errno; free (cstr); errno = eno; \
221 SCM_SYMBOL (sym_read_pipe
, "read pipe");
222 SCM_SYMBOL (sym_write_pipe
, "write pipe");
224 SCM_DEFINE (scm_pipe
, "pipe", 0, 0, 0,
226 "Return a newly created pipe: a pair of ports which are linked\n"
227 "together on the local machine. The @emph{car} is the input\n"
228 "port and the @emph{cdr} is the output port. Data written (and\n"
229 "flushed) to the output port can be read from the input port.\n"
230 "Pipes are commonly used for communication with a newly forked\n"
231 "child process. The need to flush the output port can be\n"
232 "avoided by making it unbuffered using @code{setvbuf}.\n"
234 "Writes occur atomically provided the size of the data in bytes\n"
235 "is not greater than the value of @code{PIPE_BUF}. Note that\n"
236 "the output port is likely to block if too much data (typically\n"
237 "equal to @code{PIPE_BUF}) has been written but not yet read\n"
238 "from the input port.")
239 #define FUNC_NAME s_scm_pipe
248 p_rd
= scm_fdes_to_port (fd
[0], "r", sym_read_pipe
);
249 p_wt
= scm_fdes_to_port (fd
[1], "w", sym_write_pipe
);
250 return scm_cons (p_rd
, p_wt
);
255 #ifdef HAVE_GETGROUPS
256 SCM_DEFINE (scm_getgroups
, "getgroups", 0, 0, 0,
258 "Return a vector of integers representing the current\n"
259 "supplementary group IDs.")
260 #define FUNC_NAME s_scm_getgroups
267 ngroups
= getgroups (0, NULL
);
271 size
= ngroups
* sizeof (GETGROUPS_T
);
272 groups
= scm_malloc (size
);
273 ngroups
= getgroups (ngroups
, groups
);
275 result
= scm_c_make_vector (ngroups
, SCM_BOOL_F
);
276 while (--ngroups
>= 0)
277 SCM_SIMPLE_VECTOR_SET (result
, ngroups
, scm_from_ulong (groups
[ngroups
]));
285 #ifdef HAVE_SETGROUPS
286 SCM_DEFINE (scm_setgroups
, "setgroups", 1, 0, 0,
288 "Set the current set of supplementary group IDs to the integers\n"
289 "in the given vector @var{vec}. The return value is\n"
292 "Generally only the superuser can set the process group IDs.")
293 #define FUNC_NAME s_scm_setgroups
302 SCM_VALIDATE_VECTOR (SCM_ARG1
, group_vec
);
304 ngroups
= SCM_SIMPLE_VECTOR_LENGTH (group_vec
);
306 /* validate before allocating, so we don't have to worry about leaks */
307 for (i
= 0; i
< ngroups
; i
++)
309 unsigned long ulong_gid
;
311 SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
),
314 if (gid
!= ulong_gid
)
315 SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
318 size
= ngroups
* sizeof (GETGROUPS_T
);
319 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
320 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
321 groups
= scm_malloc (size
);
322 for(i
= 0; i
< ngroups
; i
++)
323 groups
[i
] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
325 result
= setgroups (ngroups
, groups
);
326 save_errno
= errno
; /* don't let free() touch errno */
331 return SCM_UNSPECIFIED
;
337 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
339 "Look up an entry in the user database. @var{obj} can be an integer,\n"
340 "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
341 "or getpwent respectively.")
342 #define FUNC_NAME s_scm_getpwuid
344 struct passwd
*entry
;
346 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
347 if (SCM_UNBNDP (user
) || scm_is_false (user
))
349 SCM_SYSCALL (entry
= getpwent ());
355 else if (scm_is_integer (user
))
357 entry
= getpwuid (scm_to_int (user
));
361 WITH_STRING (user
, c_user
,
362 entry
= getpwnam (c_user
));
365 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
367 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
368 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
369 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
370 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
371 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
373 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (""));
375 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
376 if (!entry
->pw_shell
)
377 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (""));
379 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
383 #endif /* HAVE_GETPWENT */
387 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
389 "If called with a true argument, initialize or reset the password data\n"
390 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
391 "@code{endpwent} procedures are implemented on top of this.")
392 #define FUNC_NAME s_scm_setpwent
394 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
398 return SCM_UNSPECIFIED
;
405 /* Combines getgrgid and getgrnam. */
406 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
408 "Look up an entry in the group database. @var{obj} can be an integer,\n"
409 "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
410 "or getgrent respectively.")
411 #define FUNC_NAME s_scm_getgrgid
414 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
416 if (SCM_UNBNDP (name
) || scm_is_false (name
))
418 SCM_SYSCALL (entry
= getgrent ());
424 else if (scm_is_integer (name
))
425 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
427 STRING_SYSCALL (name
, c_name
,
428 entry
= getgrnam (c_name
));
432 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
433 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
434 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
435 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
442 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
444 "If called with a true argument, initialize or reset the group data\n"
445 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
446 "@code{endgrent} procedures are implemented on top of this.")
447 #define FUNC_NAME s_scm_setgrent
449 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
453 return SCM_UNSPECIFIED
;
456 #endif /* HAVE_GETGRENT */
459 #ifdef HAVE_GETRLIMIT
461 SCM_SYMBOL (sym_as
, "as");
464 SCM_SYMBOL (sym_core
, "core");
467 SCM_SYMBOL (sym_cpu
, "cpu");
470 SCM_SYMBOL (sym_data
, "data");
473 SCM_SYMBOL (sym_fsize
, "fsize");
475 #ifdef RLIMIT_MEMLOCK
476 SCM_SYMBOL (sym_memlock
, "memlock");
478 #ifdef RLIMIT_MSGQUEUE
479 SCM_SYMBOL (sym_msgqueue
, "msgqueue");
482 SCM_SYMBOL (sym_nice
, "nice");
485 SCM_SYMBOL (sym_nofile
, "nofile");
488 SCM_SYMBOL (sym_nproc
, "nproc");
491 SCM_SYMBOL (sym_rss
, "rss");
494 SCM_SYMBOL (sym_rtprio
, "rtprio");
497 SCM_SYMBOL (sym_rttime
, "rttime");
499 #ifdef RLIMIT_SIGPENDING
500 SCM_SYMBOL (sym_sigpending
, "sigpending");
503 SCM_SYMBOL (sym_stack
, "stack");
507 scm_to_resource (SCM s
, const char *func
, int pos
)
509 if (scm_is_number (s
))
510 return scm_to_int (s
);
512 SCM_ASSERT_TYPE (scm_is_symbol (s
), s
, pos
, func
, "symbol");
534 #ifdef RLIMIT_MEMLOCK
535 if (s
== sym_memlock
)
536 return RLIMIT_MEMLOCK
;
538 #ifdef RLIMIT_MSGQUEUE
539 if (s
== sym_msgqueue
)
540 return RLIMIT_MSGQUEUE
;
548 return RLIMIT_NOFILE
;
560 return RLIMIT_RTPRIO
;
564 return RLIMIT_RTPRIO
;
566 #ifdef RLIMIT_SIGPENDING
567 if (s
== sym_sigpending
)
568 return RLIMIT_SIGPENDING
;
575 scm_misc_error (func
, "invalid rlimit resource ~A", scm_list_1 (s
));
579 SCM_DEFINE (scm_getrlimit
, "getrlimit", 1, 0, 0,
581 "Get a resource limit for this process. @var{resource} identifies the resource,\n"
582 "either as an integer or as a symbol. For example, @code{(getrlimit 'stack)}\n"
583 "gets the limits associated with @code{RLIMIT_STACK}.\n\n"
584 "@code{getrlimit} returns two values, the soft and the hard limit. If no\n"
585 "limit is set for the resource in question, the returned limit will be @code{#f}.")
586 #define FUNC_NAME s_scm_getrlimit
589 struct rlimit lim
= { 0, 0 };
591 iresource
= scm_to_resource (resource
, FUNC_NAME
, 1);
593 if (getrlimit (iresource
, &lim
) != 0)
594 scm_syserror (FUNC_NAME
);
596 return scm_values (scm_list_2 ((lim
.rlim_cur
== RLIM_INFINITY
) ? SCM_BOOL_F
597 : scm_from_long (lim
.rlim_cur
),
598 (lim
.rlim_max
== RLIM_INFINITY
) ? SCM_BOOL_F
599 : scm_from_long (lim
.rlim_max
)));
604 #ifdef HAVE_SETRLIMIT
605 SCM_DEFINE (scm_setrlimit
, "setrlimit", 3, 0, 0,
606 (SCM resource
, SCM soft
, SCM hard
),
607 "Set a resource limit for this process. @var{resource} identifies the resource,\n"
608 "either as an integer or as a symbol. @var{soft} and @var{hard} should be integers,\n"
609 "or @code{#f} to indicate no limit (i.e., @code{RLIM_INFINITY}).\n\n"
610 "For example, @code{(setrlimit 'stack 150000 300000)} sets the @code{RLIMIT_STACK}\n"
611 "limit to 150 kilobytes, with a hard limit of 300 kB.")
612 #define FUNC_NAME s_scm_setrlimit
615 struct rlimit lim
= { 0, 0 };
617 iresource
= scm_to_resource (resource
, FUNC_NAME
, 1);
619 lim
.rlim_cur
= (soft
== SCM_BOOL_F
) ? RLIM_INFINITY
: scm_to_long (soft
);
620 lim
.rlim_max
= (hard
== SCM_BOOL_F
) ? RLIM_INFINITY
: scm_to_long (hard
);
622 if (setrlimit (iresource
, &lim
) != 0)
623 scm_syserror (FUNC_NAME
);
625 return SCM_UNSPECIFIED
;
628 #endif /* HAVE_SETRLIMIT */
629 #endif /* HAVE_GETRLIMIT */
632 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
634 "Sends a signal to the specified process or group of processes.\n\n"
635 "@var{pid} specifies the processes to which the signal is sent:\n\n"
637 "@item @var{pid} greater than 0\n"
638 "The process whose identifier is @var{pid}.\n"
639 "@item @var{pid} equal to 0\n"
640 "All processes in the current process group.\n"
641 "@item @var{pid} less than -1\n"
642 "The process group whose identifier is -@var{pid}\n"
643 "@item @var{pid} equal to -1\n"
644 "If the process is privileged, all processes except for some special\n"
645 "system processes. Otherwise, all processes with the current effective\n"
648 "@var{sig} should be specified using a variable corresponding to\n"
649 "the Unix symbolic name, e.g.,\n\n"
654 "Interrupt signal.\n"
656 #define FUNC_NAME s_scm_kill
658 /* Signal values are interned in scm_init_posix(). */
660 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
663 /* Mingw has raise(), but not kill(). (Other raw DOS environments might
664 be similar.) Use raise() when the requested pid is our own process,
666 if (scm_to_int (pid
) == getpid ())
668 if (raise (scm_to_int (sig
)) != 0)
680 return SCM_UNSPECIFIED
;
685 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
686 (SCM pid
, SCM options
),
687 "This procedure collects status information from a child process which\n"
688 "has terminated or (optionally) stopped. Normally it will\n"
689 "suspend the calling process until this can be done. If more than one\n"
690 "child process is eligible then one will be chosen by the operating system.\n\n"
691 "The value of @var{pid} determines the behaviour:\n\n"
693 "@item @var{pid} greater than 0\n"
694 "Request status information from the specified child process.\n"
695 "@item @var{pid} equal to -1 or WAIT_ANY\n"
696 "Request status information for any child process.\n"
697 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
698 "Request status information for any child process in the current process\n"
700 "@item @var{pid} less than -1\n"
701 "Request status information for any child process whose process group ID\n"
704 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
705 "values of zero or more of the following variables:\n\n"
707 "Return immediately even if there are no child processes to be collected.\n"
709 "@defvar WUNTRACED\n"
710 "Report status information for stopped processes as well as terminated\n"
713 "The return value is a pair containing:\n\n"
716 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
717 "specified and no process was collected.\n"
719 "The integer status value.\n"
721 #define FUNC_NAME s_scm_waitpid
726 if (SCM_UNBNDP (options
))
730 /* Flags are interned in scm_init_posix. */
731 ioptions
= scm_to_int (options
);
733 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
736 return scm_cons (scm_from_int (i
), scm_from_int (status
));
739 #endif /* HAVE_WAITPID */
742 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
744 "Return the exit status value, as would be set if a process\n"
745 "ended normally through a call to @code{exit} or @code{_exit},\n"
746 "if any, otherwise @code{#f}.")
747 #define FUNC_NAME s_scm_status_exit_val
751 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
753 lstatus
= scm_to_int (status
);
754 if (WIFEXITED (lstatus
))
755 return (scm_from_int (WEXITSTATUS (lstatus
)));
761 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
763 "Return the signal number which terminated the process, if any,\n"
764 "otherwise @code{#f}.")
765 #define FUNC_NAME s_scm_status_term_sig
769 lstatus
= scm_to_int (status
);
770 if (WIFSIGNALED (lstatus
))
771 return scm_from_int (WTERMSIG (lstatus
));
777 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
779 "Return the signal number which stopped the process, if any,\n"
780 "otherwise @code{#f}.")
781 #define FUNC_NAME s_scm_status_stop_sig
785 lstatus
= scm_to_int (status
);
786 if (WIFSTOPPED (lstatus
))
787 return scm_from_int (WSTOPSIG (lstatus
));
792 #endif /* __MINGW32__ */
795 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
797 "Return an integer representing the process ID of the parent\n"
799 #define FUNC_NAME s_scm_getppid
801 return scm_from_int (getppid ());
804 #endif /* HAVE_GETPPID */
808 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
810 "Return an integer representing the current real user ID.")
811 #define FUNC_NAME s_scm_getuid
813 return scm_from_int (getuid ());
819 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
821 "Return an integer representing the current real group ID.")
822 #define FUNC_NAME s_scm_getgid
824 return scm_from_int (getgid ());
830 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
832 "Return an integer representing the current effective user ID.\n"
833 "If the system does not support effective IDs, then the real ID\n"
834 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
835 "system supports effective IDs.")
836 #define FUNC_NAME s_scm_geteuid
839 return scm_from_int (geteuid ());
841 return scm_from_int (getuid ());
847 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
849 "Return an integer representing the current effective group ID.\n"
850 "If the system does not support effective IDs, then the real ID\n"
851 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
852 "system supports effective IDs.")
853 #define FUNC_NAME s_scm_getegid
856 return scm_from_int (getegid ());
858 return scm_from_int (getgid ());
864 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
866 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
867 "the process has appropriate privileges.\n"
868 "The return value is unspecified.")
869 #define FUNC_NAME s_scm_setuid
871 if (setuid (scm_to_int (id
)) != 0)
873 return SCM_UNSPECIFIED
;
877 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
879 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
880 "the process has appropriate privileges.\n"
881 "The return value is unspecified.")
882 #define FUNC_NAME s_scm_setgid
884 if (setgid (scm_to_int (id
)) != 0)
886 return SCM_UNSPECIFIED
;
890 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
892 "Sets the effective user ID to the integer @var{id}, provided the process\n"
893 "has appropriate privileges. If effective IDs are not supported, the\n"
894 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
895 "system supports effective IDs.\n"
896 "The return value is unspecified.")
897 #define FUNC_NAME s_scm_seteuid
902 rv
= seteuid (scm_to_int (id
));
904 rv
= setuid (scm_to_int (id
));
908 return SCM_UNSPECIFIED
;
911 #endif /* __MINGW32__ */
915 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
917 "Sets the effective group ID to the integer @var{id}, provided the process\n"
918 "has appropriate privileges. If effective IDs are not supported, the\n"
919 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
920 "system supports effective IDs.\n"
921 "The return value is unspecified.")
922 #define FUNC_NAME s_scm_setegid
927 rv
= setegid (scm_to_int (id
));
929 rv
= setgid (scm_to_int (id
));
933 return SCM_UNSPECIFIED
;
941 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
943 "Return an integer representing the current process group ID.\n"
944 "This is the POSIX definition, not BSD.")
945 #define FUNC_NAME s_scm_getpgrp
948 fn
= (int (*) ()) getpgrp
;
949 return scm_from_int (fn (0));
952 #endif /* HAVE_GETPGRP */
956 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
958 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
959 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
961 "Fails on systems that do not support job control.\n"
962 "The return value is unspecified.")
963 #define FUNC_NAME s_scm_setpgid
965 /* FIXME(?): may be known as setpgrp. */
966 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
968 return SCM_UNSPECIFIED
;
971 #endif /* HAVE_SETPGID */
974 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
976 "Creates a new session. The current process becomes the session leader\n"
977 "and is put in a new process group. The process will be detached\n"
978 "from its controlling terminal if it has one.\n"
979 "The return value is an integer representing the new process group ID.")
980 #define FUNC_NAME s_scm_setsid
982 pid_t sid
= setsid ();
985 return SCM_UNSPECIFIED
;
988 #endif /* HAVE_SETSID */
991 SCM_DEFINE (scm_getsid
, "getsid", 1, 0, 0,
993 "Returns the session ID of process @var{pid}. (The session\n"
994 "ID of a process is the process group ID of its session leader.)")
995 #define FUNC_NAME s_scm_getsid
997 return scm_from_int (getsid (scm_to_int (pid
)));
1000 #endif /* HAVE_GETSID */
1003 /* ttyname returns its result in a single static buffer, hence
1004 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
1005 continuously calling ttyname will otherwise get an overwrite quite
1008 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
1009 there's probably little to be gained in either speed or parallelism. */
1012 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
1014 "Return a string with the name of the serial terminal device\n"
1015 "underlying @var{port}.")
1016 #define FUNC_NAME s_scm_ttyname
1020 SCM ret
= SCM_BOOL_F
;
1022 port
= SCM_COERCE_OUTPORT (port
);
1023 SCM_VALIDATE_OPPORT (1, port
);
1024 if (!SCM_FPORTP (port
))
1026 fd
= SCM_FPORT_FDES (port
);
1028 scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex
);
1030 SCM_SYSCALL (result
= ttyname (fd
));
1033 result
= strdup (result
);
1035 scm_i_pthread_mutex_unlock (&scm_i_misc_mutex
);
1043 ret
= scm_take_locale_string (result
);
1048 #endif /* HAVE_TTYNAME */
1051 /* For thread safety "buf" is used instead of NULL for the ctermid static
1052 buffer. Actually it's unlikely the controlling terminal will change
1053 during program execution, and indeed on glibc (2.3.2) it's always just
1054 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
1055 safety everywhere. */
1057 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
1059 "Return a string containing the file name of the controlling\n"
1060 "terminal for the current process.")
1061 #define FUNC_NAME s_scm_ctermid
1063 char buf
[L_ctermid
];
1064 char *result
= ctermid (buf
);
1065 if (*result
== '\0')
1067 return scm_from_locale_string (result
);
1070 #endif /* HAVE_CTERMID */
1072 #ifdef HAVE_TCGETPGRP
1073 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
1075 "Return the process group ID of the foreground process group\n"
1076 "associated with the terminal open on the file descriptor\n"
1077 "underlying @var{port}.\n"
1079 "If there is no foreground process group, the return value is a\n"
1080 "number greater than 1 that does not match the process group ID\n"
1081 "of any existing process group. This can happen if all of the\n"
1082 "processes in the job that was formerly the foreground job have\n"
1083 "terminated, and no other job has yet been moved into the\n"
1085 #define FUNC_NAME s_scm_tcgetpgrp
1090 port
= SCM_COERCE_OUTPORT (port
);
1092 SCM_VALIDATE_OPFPORT (1, port
);
1093 fd
= SCM_FPORT_FDES (port
);
1094 if ((pgid
= tcgetpgrp (fd
)) == -1)
1096 return scm_from_int (pgid
);
1099 #endif /* HAVE_TCGETPGRP */
1101 #ifdef HAVE_TCSETPGRP
1102 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
1103 (SCM port
, SCM pgid
),
1104 "Set the foreground process group ID for the terminal used by the file\n"
1105 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
1106 "The calling process\n"
1107 "must be a member of the same session as @var{pgid} and must have the same\n"
1108 "controlling terminal. The return value is unspecified.")
1109 #define FUNC_NAME s_scm_tcsetpgrp
1113 port
= SCM_COERCE_OUTPORT (port
);
1115 SCM_VALIDATE_OPFPORT (1, port
);
1116 fd
= SCM_FPORT_FDES (port
);
1117 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
1119 return SCM_UNSPECIFIED
;
1122 #endif /* HAVE_TCSETPGRP */
1124 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
1125 (SCM filename
, SCM args
),
1126 "Executes the file named by @var{path} as a new process image.\n"
1127 "The remaining arguments are supplied to the process; from a C program\n"
1128 "they are accessible as the @code{argv} argument to @code{main}.\n"
1129 "Conventionally the first @var{arg} is the same as @var{path}.\n"
1130 "All arguments must be strings.\n\n"
1131 "If @var{arg} is missing, @var{path} is executed with a null\n"
1132 "argument list, which may have system-dependent side-effects.\n\n"
1133 "This procedure is currently implemented using the @code{execv} system\n"
1134 "call, but we call it @code{execl} because of its Scheme calling interface.")
1135 #define FUNC_NAME s_scm_execl
1140 scm_dynwind_begin (0);
1142 exec_file
= scm_to_locale_string (filename
);
1143 scm_dynwind_free (exec_file
);
1145 exec_argv
= scm_i_allocate_string_pointers (args
);
1149 /* extra "const" in mingw formals, provokes warning from gcc */
1150 (const char * const *)
1161 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
1162 (SCM filename
, SCM args
),
1163 "Similar to @code{execl}, however if\n"
1164 "@var{filename} does not contain a slash\n"
1165 "then the file to execute will be located by searching the\n"
1166 "directories listed in the @code{PATH} environment variable.\n\n"
1167 "This procedure is currently implemented using the @code{execvp} system\n"
1168 "call, but we call it @code{execlp} because of its Scheme calling interface.")
1169 #define FUNC_NAME s_scm_execlp
1174 scm_dynwind_begin (0);
1176 exec_file
= scm_to_locale_string (filename
);
1177 scm_dynwind_free (exec_file
);
1179 exec_argv
= scm_i_allocate_string_pointers (args
);
1183 /* extra "const" in mingw formals, provokes warning from gcc */
1184 (const char * const *)
1196 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
1197 list strings the way environ_list_to_c gives. */
1199 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
1200 (SCM filename
, SCM env
, SCM args
),
1201 "Similar to @code{execl}, but the environment of the new process is\n"
1202 "specified by @var{env}, which must be a list of strings as returned by the\n"
1203 "@code{environ} procedure.\n\n"
1204 "This procedure is currently implemented using the @code{execve} system\n"
1205 "call, but we call it @code{execle} because of its Scheme calling interface.")
1206 #define FUNC_NAME s_scm_execle
1212 scm_dynwind_begin (0);
1214 exec_file
= scm_to_locale_string (filename
);
1215 scm_dynwind_free (exec_file
);
1217 exec_argv
= scm_i_allocate_string_pointers (args
);
1218 exec_env
= scm_i_allocate_string_pointers (env
);
1222 /* extra "const" in mingw formals, provokes warning from gcc */
1223 (const char * const *)
1227 /* extra "const" in mingw formals, provokes warning from gcc */
1228 (const char * const *)
1240 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1242 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1243 "In the child the return value is 0. In the parent the return value is\n"
1244 "the integer process ID of the child.\n\n"
1245 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1246 "with the scsh fork.")
1247 #define FUNC_NAME s_scm_fork
1253 return scm_from_int (pid
);
1256 #endif /* HAVE_FORK */
1259 # include "win32-uname.h"
1262 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1263 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1265 "Return an object with some information about the computer\n"
1266 "system the program is running on.")
1267 #define FUNC_NAME s_scm_uname
1270 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1271 if (uname (&buf
) < 0)
1273 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1274 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1275 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1276 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1277 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1280 SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1285 #endif /* HAVE_UNAME */
1287 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1289 "If @var{env} is omitted, return the current environment (in the\n"
1290 "Unix sense) as a list of strings. Otherwise set the current\n"
1291 "environment, which is also the default environment for child\n"
1292 "processes, to the supplied list of strings. Each member of\n"
1293 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1294 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1295 "then the return value is unspecified.")
1296 #define FUNC_NAME s_scm_environ
1298 if (SCM_UNBNDP (env
))
1299 return scm_makfromstrs (-1, environ
);
1302 environ
= scm_i_allocate_string_pointers (env
);
1303 return SCM_UNSPECIFIED
;
1310 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1312 "Return a name in the file system that does not match any\n"
1313 "existing file. However there is no guarantee that another\n"
1314 "process will not create the file after @code{tmpnam} is called.\n"
1315 "Care should be taken if opening the file, e.g., use the\n"
1316 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1317 #define FUNC_NAME s_scm_tmpnam
1319 char name
[L_tmpnam
];
1322 SCM_SYSCALL (rv
= tmpnam (name
));
1324 /* not SCM_SYSERROR since errno probably not set. */
1325 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1326 return scm_from_locale_string (name
);
1332 SCM_DEFINE (scm_tmpfile
, "tmpfile", 0, 0, 0,
1334 "Return an input/output port to a unique temporary file\n"
1335 "named using the path prefix @code{P_tmpdir} defined in\n"
1337 "The file is automatically deleted when the port is closed\n"
1338 "or the program terminates.")
1339 #define FUNC_NAME s_scm_tmpfile
1343 if (! (rv
= tmpfile ()))
1345 return scm_fdes_to_port (fileno (rv
), "w+", SCM_BOOL_F
);
1349 SCM_DEFINE (scm_utime
, "utime", 1, 5, 0,
1350 (SCM pathname
, SCM actime
, SCM modtime
, SCM actimens
, SCM modtimens
,
1352 "@code{utime} sets the access and modification times for the\n"
1353 "file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1354 "not supplied, then the current time is used. @var{actime} and\n"
1355 "@var{modtime} must be integer time values as returned by the\n"
1356 "@code{current-time} procedure.\n\n"
1357 "The optional @var{actimens} and @var{modtimens} are nanoseconds\n"
1358 "to add @var{actime} and @var{modtime}. Nanosecond precision is\n"
1359 "only supported on some combinations of file systems and operating\n"
1362 "(utime \"foo\" (- (current-time) 3600))\n"
1364 "will set the access time to one hour in the past and the\n"
1365 "modification time to the current time.")
1366 #define FUNC_NAME s_scm_utime
1369 time_t atim_sec
, mtim_sec
;
1370 long atim_nsec
, mtim_nsec
;
1373 if (SCM_UNBNDP (actime
))
1375 #ifdef HAVE_UTIMENSAT
1377 atim_nsec
= UTIME_NOW
;
1379 SCM_SYSCALL (time (&atim_sec
));
1385 atim_sec
= SCM_NUM2ULONG (2, actime
);
1386 if (SCM_UNBNDP (actimens
))
1389 atim_nsec
= SCM_NUM2LONG (4, actimens
);
1392 if (SCM_UNBNDP (modtime
))
1394 #ifdef HAVE_UTIMENSAT
1396 mtim_nsec
= UTIME_NOW
;
1398 SCM_SYSCALL (time (&mtim_sec
));
1404 mtim_sec
= SCM_NUM2ULONG (3, modtime
);
1405 if (SCM_UNBNDP (modtimens
))
1408 mtim_nsec
= SCM_NUM2LONG (5, modtimens
);
1411 if (SCM_UNBNDP (flags
))
1414 f
= SCM_NUM2INT (6, flags
);
1416 #ifdef HAVE_UTIMENSAT
1418 struct timespec times
[2];
1419 times
[0].tv_sec
= atim_sec
;
1420 times
[0].tv_nsec
= atim_nsec
;
1421 times
[1].tv_sec
= mtim_sec
;
1422 times
[1].tv_nsec
= mtim_nsec
;
1424 STRING_SYSCALL (pathname
, c_pathname
,
1425 rv
= utimensat (AT_FDCWD
, c_pathname
, times
, f
));
1430 utm
.actime
= atim_sec
;
1431 utm
.modtime
= mtim_sec
;
1433 STRING_SYSCALL (pathname
, c_pathname
,
1434 rv
= utime (c_pathname
, &utm
));
1440 return SCM_UNSPECIFIED
;
1444 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1446 "Return an integer representing the current process ID.")
1447 #define FUNC_NAME s_scm_getpid
1449 return scm_from_ulong (getpid ());
1453 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1455 "Modifies the environment of the current process, which is\n"
1456 "also the default environment inherited by child processes.\n\n"
1457 "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1458 "directly into the environment, replacing any existing environment string\n"
1460 "name matching @code{NAME}. If @var{string} does not contain an equal\n"
1461 "sign, then any existing string with name matching @var{string} will\n"
1463 "The return value is unspecified.")
1464 #define FUNC_NAME s_scm_putenv
1467 char *c_str
= scm_to_locale_string (str
);
1469 /* Leave C_STR in the environment. */
1471 /* Gnulib's `putenv' module honors the semantics described above. */
1472 rv
= putenv (c_str
);
1476 return SCM_UNSPECIFIED
;
1480 /* This mutex is used to serialize invocations of `setlocale ()' on non-GNU
1481 systems (i.e., systems where a reentrant locale API is not available). It
1482 is also acquired before calls to `nl_langinfo ()'. See `i18n.c' for
1484 scm_i_pthread_mutex_t scm_i_locale_mutex
= SCM_I_PTHREAD_MUTEX_INITIALIZER
;
1486 #ifdef HAVE_SETLOCALE
1488 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1489 (SCM category
, SCM locale
),
1490 "If @var{locale} is omitted, return the current value of the\n"
1491 "specified locale category as a system-dependent string.\n"
1492 "@var{category} should be specified using the values\n"
1493 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1495 "Otherwise the specified locale category is set to the string\n"
1496 "@var{locale} and the new value is returned as a\n"
1497 "system-dependent string. If @var{locale} is an empty string,\n"
1498 "the locale will be set using environment variables.\n"
1500 "When the locale is changed, the character encoding of the new\n"
1501 "locale (UTF-8, ISO-8859-1, etc.) is used for the current\n"
1502 "input, output, and error ports\n")
1503 #define FUNC_NAME s_scm_setlocale
1510 scm_dynwind_begin (0);
1512 if (SCM_UNBNDP (locale
))
1518 clocale
= scm_to_locale_string (locale
);
1519 scm_dynwind_free (clocale
);
1522 c_category
= scm_i_to_lc_category (category
, 1);
1524 scm_i_pthread_mutex_lock (&scm_i_locale_mutex
);
1525 rv
= setlocale (c_category
, clocale
);
1526 scm_i_pthread_mutex_unlock (&scm_i_locale_mutex
);
1530 /* POSIX and C99 don't say anything about setlocale setting errno, so
1531 force a sensible value here. glibc leaves ENOENT, which would be
1532 fine, but it's not a documented feature. */
1537 enc
= locale_charset ();
1539 /* Set the default encoding for new ports. */
1540 scm_i_set_default_port_encoding (enc
);
1542 /* Set the encoding for the stdio ports. */
1543 scm_i_set_port_encoding_x (scm_current_input_port (), enc
);
1544 scm_i_set_port_encoding_x (scm_current_output_port (), enc
);
1545 scm_i_set_port_encoding_x (scm_current_error_port (), enc
);
1548 return scm_from_locale_string (rv
);
1551 #endif /* HAVE_SETLOCALE */
1554 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1555 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1556 "Creates a new special file, such as a file corresponding to a device.\n"
1557 "@var{path} specifies the name of the file. @var{type} should\n"
1558 "be one of the following symbols:\n"
1559 "regular, directory, symlink, block-special, char-special,\n"
1560 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1561 "@var{dev} (an integer) specifies which device the special file refers\n"
1562 "to. Its exact interpretation depends on the kind of special file\n"
1563 "being created.\n\n"
1566 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1568 "The return value is unspecified.")
1569 #define FUNC_NAME s_scm_mknod
1575 SCM_VALIDATE_STRING (1, path
);
1576 SCM_VALIDATE_SYMBOL (2, type
);
1578 p
= scm_i_symbol_chars (type
);
1579 if (strcmp (p
, "regular") == 0)
1581 else if (strcmp (p
, "directory") == 0)
1584 /* systems without symlinks probably don't have S_IFLNK defined */
1585 else if (strcmp (p
, "symlink") == 0)
1588 else if (strcmp (p
, "block-special") == 0)
1590 else if (strcmp (p
, "char-special") == 0)
1592 else if (strcmp (p
, "fifo") == 0)
1595 else if (strcmp (p
, "socket") == 0)
1599 SCM_OUT_OF_RANGE (2, type
);
1601 STRING_SYSCALL (path
, c_path
,
1602 val
= mknod (c_path
,
1603 ctype
| scm_to_int (perms
),
1607 return SCM_UNSPECIFIED
;
1610 #endif /* HAVE_MKNOD */
1613 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1615 "Increment the priority of the current process by @var{incr}. A higher\n"
1616 "priority value means that the process runs less often.\n"
1617 "The return value is unspecified.")
1618 #define FUNC_NAME s_scm_nice
1620 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1621 from "prio-NZERO", so an error must be detected from errno changed */
1623 nice (scm_to_int (incr
));
1627 return SCM_UNSPECIFIED
;
1630 #endif /* HAVE_NICE */
1633 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1635 "Flush the operating system disk buffers.\n"
1636 "The return value is unspecified.")
1637 #define FUNC_NAME s_scm_sync
1640 return SCM_UNSPECIFIED
;
1643 #endif /* HAVE_SYNC */
1646 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1647 to avoid another thread overwriting it. A test program running crypt
1648 continuously in two threads can be quickly seen tripping this problem.
1649 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1651 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1652 slower (about 5x) than plain crypt if you pass an uninitialized data
1653 block each time. Presumably there's some one-time setups. The best way
1654 to use crypt_r for parallel execution in multiple threads would probably
1655 be to maintain a little pool of initialized crypt_data structures, take
1656 one and use it, then return it to the pool. That pool could be garbage
1657 collected so it didn't add permanently to memory use if only a few crypt
1658 calls are made. But we expect crypt will be used rarely, and even more
1659 rarely will there be any desire for lots of parallel execution on
1660 multiple cpus. So for now we don't bother with anything fancy, just
1664 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1665 (SCM key
, SCM salt
),
1666 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1667 "crypt(3) library call.")
1668 #define FUNC_NAME s_scm_crypt
1671 char *c_key
, *c_salt
, *c_ret
;
1673 scm_dynwind_begin (0);
1674 scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex
);
1676 c_key
= scm_to_locale_string (key
);
1677 scm_dynwind_free (c_key
);
1678 c_salt
= scm_to_locale_string (salt
);
1679 scm_dynwind_free (c_salt
);
1681 /* The Linux crypt(3) man page says crypt will return NULL and set errno
1682 on error. (Eg. ENOSYS if legal restrictions mean it cannot be
1684 c_ret
= crypt (c_key
, c_salt
);
1688 ret
= scm_from_locale_string (c_ret
);
1693 #endif /* HAVE_CRYPT */
1696 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1698 "Change the root directory to that specified in @var{path}.\n"
1699 "This directory will be used for path names beginning with\n"
1700 "@file{/}. The root directory is inherited by all children\n"
1701 "of the current process. Only the superuser may change the\n"
1703 #define FUNC_NAME s_scm_chroot
1707 WITH_STRING (path
, c_path
,
1708 rv
= chroot (c_path
));
1711 return SCM_UNSPECIFIED
;
1714 #endif /* HAVE_CHROOT */
1718 /* Wrapper function to supplying `getlogin()' under Windows. */
1719 static char * getlogin (void)
1721 static char user
[256];
1722 static unsigned long len
= 256;
1724 if (!GetUserName (user
, &len
))
1728 #endif /* __MINGW32__ */
1731 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1732 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1734 "Return a string containing the name of the user logged in on\n"
1735 "the controlling terminal of the process, or @code{#f} if this\n"
1736 "information cannot be obtained.")
1737 #define FUNC_NAME s_scm_getlogin
1744 return scm_from_locale_string (p
);
1747 #endif /* HAVE_GETLOGIN */
1749 #if HAVE_GETPRIORITY
1750 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1751 (SCM which
, SCM who
),
1752 "Return the scheduling priority of the process, process group\n"
1753 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1754 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1755 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1756 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1757 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1758 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1759 "denotes the current process, process group, or user. Return\n"
1760 "the highest priority (lowest numerical value) of any of the\n"
1761 "specified processes.")
1762 #define FUNC_NAME s_scm_getpriority
1764 int cwhich
, cwho
, ret
;
1766 cwhich
= scm_to_int (which
);
1767 cwho
= scm_to_int (who
);
1769 /* We have to clear errno and examine it later, because -1 is a
1770 legal return value for getpriority(). */
1772 ret
= getpriority (cwhich
, cwho
);
1775 return scm_from_int (ret
);
1778 #endif /* HAVE_GETPRIORITY */
1780 #if HAVE_SETPRIORITY
1781 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1782 (SCM which
, SCM who
, SCM prio
),
1783 "Set the scheduling priority of the process, process group\n"
1784 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1785 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1786 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1787 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1788 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1789 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1790 "denotes the current process, process group, or user.\n"
1791 "@var{prio} is a value in the range -20 and 20, the default\n"
1792 "priority is 0; lower priorities cause more favorable\n"
1793 "scheduling. Sets the priority of all of the specified\n"
1794 "processes. Only the super-user may lower priorities.\n"
1795 "The return value is not specified.")
1796 #define FUNC_NAME s_scm_setpriority
1798 int cwhich
, cwho
, cprio
;
1800 cwhich
= scm_to_int (which
);
1801 cwho
= scm_to_int (who
);
1802 cprio
= scm_to_int (prio
);
1804 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1806 return SCM_UNSPECIFIED
;
1809 #endif /* HAVE_SETPRIORITY */
1811 #ifdef HAVE_SCHED_GETAFFINITY
1814 cpu_set_to_bitvector (const cpu_set_t
*cs
)
1819 bv
= scm_c_make_bitvector (sizeof (*cs
), SCM_BOOL_F
);
1821 for (cpu
= 0; cpu
< sizeof (*cs
); cpu
++)
1823 if (CPU_ISSET (cpu
, cs
))
1824 /* XXX: This is inefficient but avoids code duplication. */
1825 scm_c_bitvector_set_x (bv
, cpu
, SCM_BOOL_T
);
1831 SCM_DEFINE (scm_getaffinity
, "getaffinity", 1, 0, 0,
1833 "Return a bitvector representing the CPU affinity mask for\n"
1834 "process @var{pid}. Each CPU the process has affinity with\n"
1835 "has its corresponding bit set in the returned bitvector.\n"
1836 "The number of bits set is a good estimate of how many CPUs\n"
1837 "Guile can use without stepping on other processes' toes.\n\n"
1838 "Currently this procedure is only defined on GNU variants\n"
1839 "(@pxref{CPU Affinity, @code{sched_getaffinity},, libc, The\n"
1840 "GNU C Library Reference Manual}).\n")
1841 #define FUNC_NAME s_scm_getaffinity
1847 err
= sched_getaffinity (scm_to_int (pid
), sizeof (cs
), &cs
);
1851 return cpu_set_to_bitvector (&cs
);
1855 #endif /* HAVE_SCHED_GETAFFINITY */
1857 #ifdef HAVE_SCHED_SETAFFINITY
1859 SCM_DEFINE (scm_setaffinity
, "setaffinity", 2, 0, 0,
1860 (SCM pid
, SCM mask
),
1861 "Install the CPU affinity mask @var{mask}, a bitvector, for\n"
1862 "the process or thread with ID @var{pid}. The return value\n"
1863 "is unspecified.\n\n"
1864 "Currently this procedure is only defined on GNU variants\n"
1865 "(@pxref{CPU Affinity, @code{sched_setaffinity},, libc, The\n"
1866 "GNU C Library Reference Manual}).\n")
1867 #define FUNC_NAME s_scm_setaffinity
1870 scm_t_array_handle handle
;
1871 const scm_t_uint32
*c_mask
;
1872 size_t len
, off
, cpu
;
1876 c_mask
= scm_bitvector_elements (mask
, &handle
, &off
, &len
, &inc
);
1879 for (cpu
= 0; cpu
< len
; cpu
++)
1883 idx
= cpu
* inc
+ off
;
1884 if (c_mask
[idx
/ 32] & (1UL << (idx
% 32)))
1888 err
= sched_setaffinity (scm_to_int (pid
), sizeof (cs
), &cs
);
1892 return SCM_UNSPECIFIED
;
1896 #endif /* HAVE_SCHED_SETAFFINITY */
1898 SCM_DEFINE (scm_total_processor_count
, "total-processor-count", 0, 0, 0,
1900 "Return the total number of processors of the machine, which\n"
1901 "is guaranteed to be at least 1. A ``processor'' here is a\n"
1902 "thread execution unit, which can be either:\n\n"
1904 "@item an execution core in a (possibly multi-core) chip, in a\n"
1905 " (possibly multi- chip) module, in a single computer, or\n"
1906 "@item a thread execution unit inside a core in the case of\n"
1907 " @dfn{hyper-threaded} CPUs.\n"
1909 "Which of the two definitions is used, is unspecified.\n")
1910 #define FUNC_NAME s_scm_total_processor_count
1912 return scm_from_ulong (num_processors (NPROC_ALL
));
1916 SCM_DEFINE (scm_current_processor_count
, "current-processor-count", 0, 0, 0,
1918 "Like @code{total-processor-count}, but return the number of\n"
1919 "processors available to the current process. See\n"
1920 "@code{setaffinity} and @code{getaffinity} for more\n"
1922 #define FUNC_NAME s_scm_current_processor_count
1924 return scm_from_ulong (num_processors (NPROC_CURRENT
));
1930 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
1932 "Display @var{prompt} to the standard error output and read\n"
1933 "a password from @file{/dev/tty}. If this file is not\n"
1934 "accessible, it reads from standard input. The password may be\n"
1935 "up to 127 characters in length. Additional characters and the\n"
1936 "terminating newline character are discarded. While reading\n"
1937 "the password, echoing and the generation of signals by special\n"
1938 "characters is disabled.")
1939 #define FUNC_NAME s_scm_getpass
1944 SCM_VALIDATE_STRING (1, prompt
);
1946 WITH_STRING (prompt
, c_prompt
,
1947 p
= getpass(c_prompt
));
1948 passwd
= scm_from_locale_string (p
);
1950 /* Clear out the password in the static buffer. */
1951 memset (p
, 0, strlen (p
));
1956 #endif /* HAVE_GETPASS */
1958 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
1959 (SCM file
, SCM operation
),
1960 "Apply or remove an advisory lock on an open file.\n"
1961 "@var{operation} specifies the action to be done:\n"
1964 "Shared lock. More than one process may hold a shared lock\n"
1965 "for a given file at a given time.\n"
1968 "Exclusive lock. Only one process may hold an exclusive lock\n"
1969 "for a given file at a given time.\n"
1972 "Unlock the file.\n"
1975 "Don't block when locking. This is combined with one of the\n"
1976 "other operations using @code{logior}. If @code{flock} would\n"
1977 "block an @code{EWOULDBLOCK} error is thrown.\n"
1980 "The return value is not specified. @var{file} may be an open\n"
1981 "file descriptor or an open file descriptor port.\n"
1983 "Note that @code{flock} does not lock files across NFS.")
1984 #define FUNC_NAME s_scm_flock
1988 if (scm_is_integer (file
))
1989 fdes
= scm_to_int (file
);
1992 SCM_VALIDATE_OPFPORT (2, file
);
1994 fdes
= SCM_FPORT_FDES (file
);
1996 if (flock (fdes
, scm_to_int (operation
)) == -1)
1998 return SCM_UNSPECIFIED
;
2002 #if HAVE_SETHOSTNAME
2003 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
2005 "Set the host name of the current processor to @var{name}. May\n"
2006 "only be used by the superuser. The return value is not\n"
2008 #define FUNC_NAME s_scm_sethostname
2012 WITH_STRING (name
, c_name
,
2013 rv
= sethostname (c_name
, strlen(c_name
)));
2016 return SCM_UNSPECIFIED
;
2019 #endif /* HAVE_SETHOSTNAME */
2022 #if HAVE_GETHOSTNAME
2023 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
2025 "Return the host name of the current processor.")
2026 #define FUNC_NAME s_scm_gethostname
2028 #ifdef MAXHOSTNAMELEN
2030 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
2031 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
2032 const int len
= MAXHOSTNAMELEN
+ 1;
2033 char *const p
= scm_malloc (len
);
2034 const int res
= gethostname (p
, len
);
2036 scm_dynwind_begin (0);
2037 scm_dynwind_unwind_handler (free
, p
, 0);
2041 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
2042 * large enough. SUSv2 specifies 255 maximum too, apparently. */
2047 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
2049 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
2050 * which may reflect a particular kernel configuration.
2051 * Must watch out for this existing but giving -1, as happens for instance
2052 * in gnu/linux glibc 2.3.2. */
2054 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
2061 p
= scm_malloc (len
);
2063 scm_dynwind_begin (0);
2064 scm_dynwind_unwind_handler (free
, p
, 0);
2066 res
= gethostname (p
, len
);
2067 while (res
== -1 && errno
== ENAMETOOLONG
)
2071 /* scm_realloc may throw an exception. */
2072 p
= scm_realloc (p
, len
);
2073 res
= gethostname (p
, len
);
2080 const int save_errno
= errno
;
2082 /* No guile exceptions can occur before we have freed p's memory. */
2091 /* scm_from_locale_string may throw an exception. */
2092 const SCM name
= scm_from_locale_string (p
);
2094 /* No guile exceptions can occur before we have freed p's memory. */
2102 #endif /* HAVE_GETHOSTNAME */
2108 scm_add_feature ("posix");
2110 scm_add_feature ("EIDs");
2113 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
2116 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
2119 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
2122 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
2126 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
2129 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
2132 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
2135 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
2138 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
2141 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
2144 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
2147 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
2150 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
2153 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
2156 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
2158 #ifdef LC_MEASUREMENT
2159 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
2161 #ifdef LC_IDENTIFICATION
2162 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
2165 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
2169 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
2172 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
2175 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
2179 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
2182 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
2185 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
2188 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
2191 #include "libguile/cpp-SIG.c"
2192 #include "libguile/posix.x"