1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2005, 2006 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
24 /* Make GNU/Linux libc declare everything it has. */
30 #include "libguile/_scm.h"
31 #include "libguile/dynwind.h"
32 #include "libguile/fports.h"
33 #include "libguile/scmsigs.h"
34 #include "libguile/feature.h"
35 #include "libguile/strings.h"
36 #include "libguile/srfi-13.h"
37 #include "libguile/srfi-14.h"
38 #include "libguile/vectors.h"
39 #include "libguile/lang.h"
41 #include "libguile/validate.h"
42 #include "libguile/posix.h"
43 #include "libguile/gettext.h"
44 #include "libguile/threads.h"
50 #ifdef TIME_WITH_SYS_TIME
51 # include <sys/time.h>
55 # include <sys/time.h>
65 extern char *ttyname();
69 #ifdef LIBC_H_WITH_UNISTD_H
73 #include <sys/types.h>
83 #ifdef HAVE_WINSOCK2_H
88 /* Some defines for Windows here. */
90 # define pipe(fd) _pipe (fd, 256, O_BINARY)
91 #endif /* __MINGW32__ */
94 # include <sys/wait.h>
97 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
100 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
105 extern char ** environ
;
110 #ifdef HAVE_SYS_UTSNAME_H
111 #include <sys/utsname.h>
114 #ifdef HAVE_SETLOCALE
118 #if (defined HAVE_NEWLOCALE) && (defined HAVE_STRCOLL_L)
119 # define USE_GNU_LOCALE_API
122 #if (defined USE_GNU_LOCALE_API) && (defined HAVE_XLOCALE_H)
123 # include <xlocale.h>
131 #include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
134 #ifdef HAVE_SYS_PARAM_H
135 #include <sys/param.h> /* for MAXHOSTNAMELEN */
138 #if HAVE_SYS_RESOURCE_H
139 # include <sys/resource.h>
143 # include <sys/file.h>
146 #if HAVE_CRT_EXTERNS_H
147 #include <crt_externs.h> /* for Darwin _NSGetEnviron */
150 /* Some Unix systems don't define these. CPP hair is dangerous, but
151 this seems safe enough... */
168 /* No prototype for this on Solaris 10. The man page says it's in
169 <unistd.h> ... but it lies. */
170 #if ! HAVE_DECL_SETHOSTNAME
171 int sethostname (char *name
, size_t namelen
);
174 /* On NextStep, <utime.h> doesn't define struct utime, unless we
175 #define _POSIX_SOURCE before #including it. I think this is less
176 of a kludge than defining struct utimbuf ourselves. */
177 #ifdef UTIMBUF_NEEDS_POSIX
178 #define _POSIX_SOURCE
181 #ifdef HAVE_SYS_UTIME_H
182 #include <sys/utime.h>
189 /* Please don't add any more #includes or #defines here. The hack
190 above means that _POSIX_SOURCE may be #defined, which will
191 encourage header files to do strange things.
193 FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
195 FIXME: Probably should do all the includes first, then all the fallback
196 declarations and defines, in case things are not in the header we
202 /* On Apple Darwin in a shared library there's no "environ" to access
203 directly, instead the address of that variable must be obtained with
205 #if HAVE__NSGETENVIRON && defined (PIC)
206 #define environ (*_NSGetEnviron())
211 /* Two often used patterns
214 #define WITH_STRING(str,cstr,code) \
216 char *cstr = scm_to_locale_string (str); \
221 #define STRING_SYSCALL(str,cstr,code) \
224 char *cstr = scm_to_locale_string (str); \
225 SCM_SYSCALL (code); \
226 eno = errno; free (cstr); errno = eno; \
231 SCM_SYMBOL (sym_read_pipe
, "read pipe");
232 SCM_SYMBOL (sym_write_pipe
, "write pipe");
234 SCM_DEFINE (scm_pipe
, "pipe", 0, 0, 0,
236 "Return a newly created pipe: a pair of ports which are linked\n"
237 "together on the local machine. The @emph{car} is the input\n"
238 "port and the @emph{cdr} is the output port. Data written (and\n"
239 "flushed) to the output port can be read from the input port.\n"
240 "Pipes are commonly used for communication with a newly forked\n"
241 "child process. The need to flush the output port can be\n"
242 "avoided by making it unbuffered using @code{setvbuf}.\n"
244 "Writes occur atomically provided the size of the data in bytes\n"
245 "is not greater than the value of @code{PIPE_BUF}. Note that\n"
246 "the output port is likely to block if too much data (typically\n"
247 "equal to @code{PIPE_BUF}) has been written but not yet read\n"
248 "from the input port.")
249 #define FUNC_NAME s_scm_pipe
258 p_rd
= scm_fdes_to_port (fd
[0], "r", sym_read_pipe
);
259 p_wt
= scm_fdes_to_port (fd
[1], "w", sym_write_pipe
);
260 return scm_cons (p_rd
, p_wt
);
265 #ifdef HAVE_GETGROUPS
266 SCM_DEFINE (scm_getgroups
, "getgroups", 0, 0, 0,
268 "Return a vector of integers representing the current\n"
269 "supplementary group IDs.")
270 #define FUNC_NAME s_scm_getgroups
277 ngroups
= getgroups (0, NULL
);
281 size
= ngroups
* sizeof (GETGROUPS_T
);
282 groups
= scm_malloc (size
);
283 getgroups (ngroups
, groups
);
285 result
= scm_c_make_vector (ngroups
, SCM_BOOL_F
);
286 while (--ngroups
>= 0)
287 SCM_SIMPLE_VECTOR_SET (result
, ngroups
, scm_from_ulong (groups
[ngroups
]));
295 #ifdef HAVE_SETGROUPS
296 SCM_DEFINE (scm_setgroups
, "setgroups", 1, 0, 0,
298 "Set the current set of supplementary group IDs to the integers\n"
299 "in the given vector @var{vec}. The return value is\n"
302 "Generally only the superuser can set the process group IDs.")
303 #define FUNC_NAME s_scm_setgroups
312 SCM_VALIDATE_VECTOR (SCM_ARG1
, group_vec
);
314 ngroups
= SCM_SIMPLE_VECTOR_LENGTH (group_vec
);
316 /* validate before allocating, so we don't have to worry about leaks */
317 for (i
= 0; i
< ngroups
; i
++)
319 unsigned long ulong_gid
;
321 SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
),
324 if (gid
!= ulong_gid
)
325 SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
328 size
= ngroups
* sizeof (GETGROUPS_T
);
329 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
330 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
331 groups
= scm_malloc (size
);
332 for(i
= 0; i
< ngroups
; i
++)
333 groups
[i
] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
335 result
= setgroups (ngroups
, groups
);
336 save_errno
= errno
; /* don't let free() touch errno */
341 return SCM_UNSPECIFIED
;
347 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
349 "Look up an entry in the user database. @var{obj} can be an integer,\n"
350 "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
351 "or getpwent respectively.")
352 #define FUNC_NAME s_scm_getpwuid
354 struct passwd
*entry
;
356 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
357 if (SCM_UNBNDP (user
) || scm_is_false (user
))
359 SCM_SYSCALL (entry
= getpwent ());
365 else if (scm_is_integer (user
))
367 entry
= getpwuid (scm_to_int (user
));
371 WITH_STRING (user
, c_user
,
372 entry
= getpwnam (c_user
));
375 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
377 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
378 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
379 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
380 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
381 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
383 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (""));
385 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
386 if (!entry
->pw_shell
)
387 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (""));
389 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
393 #endif /* HAVE_GETPWENT */
397 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
399 "If called with a true argument, initialize or reset the password data\n"
400 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
401 "@code{endpwent} procedures are implemented on top of this.")
402 #define FUNC_NAME s_scm_setpwent
404 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
408 return SCM_UNSPECIFIED
;
415 /* Combines getgrgid and getgrnam. */
416 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
418 "Look up an entry in the group database. @var{obj} can be an integer,\n"
419 "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
420 "or getgrent respectively.")
421 #define FUNC_NAME s_scm_getgrgid
424 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
426 if (SCM_UNBNDP (name
) || scm_is_false (name
))
428 SCM_SYSCALL (entry
= getgrent ());
434 else if (scm_is_integer (name
))
435 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
437 STRING_SYSCALL (name
, c_name
,
438 entry
= getgrnam (c_name
));
442 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
443 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
444 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
445 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
452 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
454 "If called with a true argument, initialize or reset the group data\n"
455 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
456 "@code{endgrent} procedures are implemented on top of this.")
457 #define FUNC_NAME s_scm_setgrent
459 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
463 return SCM_UNSPECIFIED
;
466 #endif /* HAVE_GETGRENT */
469 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
471 "Sends a signal to the specified process or group of processes.\n\n"
472 "@var{pid} specifies the processes to which the signal is sent:\n\n"
474 "@item @var{pid} greater than 0\n"
475 "The process whose identifier is @var{pid}.\n"
476 "@item @var{pid} equal to 0\n"
477 "All processes in the current process group.\n"
478 "@item @var{pid} less than -1\n"
479 "The process group whose identifier is -@var{pid}\n"
480 "@item @var{pid} equal to -1\n"
481 "If the process is privileged, all processes except for some special\n"
482 "system processes. Otherwise, all processes with the current effective\n"
485 "@var{sig} should be specified using a variable corresponding to\n"
486 "the Unix symbolic name, e.g.,\n\n"
491 "Interrupt signal.\n"
493 #define FUNC_NAME s_scm_kill
495 /* Signal values are interned in scm_init_posix(). */
497 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
500 /* Mingw has raise(), but not kill(). (Other raw DOS environments might
501 be similar.) Use raise() when the requested pid is our own process,
503 if (scm_to_int (pid
) == getpid ())
505 if (raise (scm_to_int (sig
)) != 0)
517 return SCM_UNSPECIFIED
;
522 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
523 (SCM pid
, SCM options
),
524 "This procedure collects status information from a child process which\n"
525 "has terminated or (optionally) stopped. Normally it will\n"
526 "suspend the calling process until this can be done. If more than one\n"
527 "child process is eligible then one will be chosen by the operating system.\n\n"
528 "The value of @var{pid} determines the behaviour:\n\n"
530 "@item @var{pid} greater than 0\n"
531 "Request status information from the specified child process.\n"
532 "@item @var{pid} equal to -1 or WAIT_ANY\n"
533 "Request status information for any child process.\n"
534 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
535 "Request status information for any child process in the current process\n"
537 "@item @var{pid} less than -1\n"
538 "Request status information for any child process whose process group ID\n"
541 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
542 "values of zero or more of the following variables:\n\n"
544 "Return immediately even if there are no child processes to be collected.\n"
546 "@defvar WUNTRACED\n"
547 "Report status information for stopped processes as well as terminated\n"
550 "The return value is a pair containing:\n\n"
553 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
554 "specified and no process was collected.\n"
556 "The integer status value.\n"
558 #define FUNC_NAME s_scm_waitpid
563 if (SCM_UNBNDP (options
))
567 /* Flags are interned in scm_init_posix. */
568 ioptions
= scm_to_int (options
);
570 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
573 return scm_cons (scm_from_int (i
), scm_from_int (status
));
576 #endif /* HAVE_WAITPID */
579 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
581 "Return the exit status value, as would be set if a process\n"
582 "ended normally through a call to @code{exit} or @code{_exit},\n"
583 "if any, otherwise @code{#f}.")
584 #define FUNC_NAME s_scm_status_exit_val
588 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
590 lstatus
= scm_to_int (status
);
591 if (WIFEXITED (lstatus
))
592 return (scm_from_int (WEXITSTATUS (lstatus
)));
598 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
600 "Return the signal number which terminated the process, if any,\n"
601 "otherwise @code{#f}.")
602 #define FUNC_NAME s_scm_status_term_sig
606 lstatus
= scm_to_int (status
);
607 if (WIFSIGNALED (lstatus
))
608 return scm_from_int (WTERMSIG (lstatus
));
614 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
616 "Return the signal number which stopped the process, if any,\n"
617 "otherwise @code{#f}.")
618 #define FUNC_NAME s_scm_status_stop_sig
622 lstatus
= scm_to_int (status
);
623 if (WIFSTOPPED (lstatus
))
624 return scm_from_int (WSTOPSIG (lstatus
));
629 #endif /* __MINGW32__ */
632 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
634 "Return an integer representing the process ID of the parent\n"
636 #define FUNC_NAME s_scm_getppid
638 return scm_from_int (getppid ());
641 #endif /* HAVE_GETPPID */
645 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
647 "Return an integer representing the current real user ID.")
648 #define FUNC_NAME s_scm_getuid
650 return scm_from_int (getuid ());
656 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
658 "Return an integer representing the current real group ID.")
659 #define FUNC_NAME s_scm_getgid
661 return scm_from_int (getgid ());
667 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
669 "Return an integer representing the current effective user ID.\n"
670 "If the system does not support effective IDs, then the real ID\n"
671 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
672 "system supports effective IDs.")
673 #define FUNC_NAME s_scm_geteuid
676 return scm_from_int (geteuid ());
678 return scm_from_int (getuid ());
684 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
686 "Return an integer representing the current effective group ID.\n"
687 "If the system does not support effective IDs, then the real ID\n"
688 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
689 "system supports effective IDs.")
690 #define FUNC_NAME s_scm_getegid
693 return scm_from_int (getegid ());
695 return scm_from_int (getgid ());
701 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
703 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
704 "the process has appropriate privileges.\n"
705 "The return value is unspecified.")
706 #define FUNC_NAME s_scm_setuid
708 if (setuid (scm_to_int (id
)) != 0)
710 return SCM_UNSPECIFIED
;
714 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
716 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
717 "the process has appropriate privileges.\n"
718 "The return value is unspecified.")
719 #define FUNC_NAME s_scm_setgid
721 if (setgid (scm_to_int (id
)) != 0)
723 return SCM_UNSPECIFIED
;
727 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
729 "Sets the effective user ID to the integer @var{id}, provided the process\n"
730 "has appropriate privileges. If effective IDs are not supported, the\n"
731 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
732 "system supports effective IDs.\n"
733 "The return value is unspecified.")
734 #define FUNC_NAME s_scm_seteuid
739 rv
= seteuid (scm_to_int (id
));
741 rv
= setuid (scm_to_int (id
));
745 return SCM_UNSPECIFIED
;
748 #endif /* __MINGW32__ */
752 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
754 "Sets the effective group ID to the integer @var{id}, provided the process\n"
755 "has appropriate privileges. If effective IDs are not supported, the\n"
756 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
757 "system supports effective IDs.\n"
758 "The return value is unspecified.")
759 #define FUNC_NAME s_scm_setegid
764 rv
= setegid (scm_to_int (id
));
766 rv
= setgid (scm_to_int (id
));
770 return SCM_UNSPECIFIED
;
778 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
780 "Return an integer representing the current process group ID.\n"
781 "This is the POSIX definition, not BSD.")
782 #define FUNC_NAME s_scm_getpgrp
785 fn
= (int (*) ()) getpgrp
;
786 return scm_from_int (fn (0));
789 #endif /* HAVE_GETPGRP */
793 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
795 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
796 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
798 "Fails on systems that do not support job control.\n"
799 "The return value is unspecified.")
800 #define FUNC_NAME s_scm_setpgid
802 /* FIXME(?): may be known as setpgrp. */
803 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
805 return SCM_UNSPECIFIED
;
808 #endif /* HAVE_SETPGID */
811 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
813 "Creates a new session. The current process becomes the session leader\n"
814 "and is put in a new process group. The process will be detached\n"
815 "from its controlling terminal if it has one.\n"
816 "The return value is an integer representing the new process group ID.")
817 #define FUNC_NAME s_scm_setsid
819 pid_t sid
= setsid ();
822 return SCM_UNSPECIFIED
;
825 #endif /* HAVE_SETSID */
828 /* ttyname returns its result in a single static buffer, hence
829 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
830 continuously calling ttyname will otherwise get an overwrite quite
833 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
834 there's probably little to be gained in either speed or parallelism. */
837 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
839 "Return a string with the name of the serial terminal device\n"
840 "underlying @var{port}.")
841 #define FUNC_NAME s_scm_ttyname
847 port
= SCM_COERCE_OUTPORT (port
);
848 SCM_VALIDATE_OPPORT (1, port
);
849 if (!SCM_FPORTP (port
))
851 fd
= SCM_FPORT_FDES (port
);
853 scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex
);
854 SCM_SYSCALL (result
= ttyname (fd
));
856 ret
= scm_from_locale_string (result
);
857 scm_i_pthread_mutex_unlock (&scm_i_misc_mutex
);
867 #endif /* HAVE_TTYNAME */
870 /* For thread safety "buf" is used instead of NULL for the ctermid static
871 buffer. Actually it's unlikely the controlling terminal will change
872 during program execution, and indeed on glibc (2.3.2) it's always just
873 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
874 safety everywhere. */
876 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
878 "Return a string containing the file name of the controlling\n"
879 "terminal for the current process.")
880 #define FUNC_NAME s_scm_ctermid
883 char *result
= ctermid (buf
);
886 return scm_from_locale_string (result
);
889 #endif /* HAVE_CTERMID */
891 #ifdef HAVE_TCGETPGRP
892 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
894 "Return the process group ID of the foreground process group\n"
895 "associated with the terminal open on the file descriptor\n"
896 "underlying @var{port}.\n"
898 "If there is no foreground process group, the return value is a\n"
899 "number greater than 1 that does not match the process group ID\n"
900 "of any existing process group. This can happen if all of the\n"
901 "processes in the job that was formerly the foreground job have\n"
902 "terminated, and no other job has yet been moved into the\n"
904 #define FUNC_NAME s_scm_tcgetpgrp
909 port
= SCM_COERCE_OUTPORT (port
);
911 SCM_VALIDATE_OPFPORT (1, port
);
912 fd
= SCM_FPORT_FDES (port
);
913 if ((pgid
= tcgetpgrp (fd
)) == -1)
915 return scm_from_int (pgid
);
918 #endif /* HAVE_TCGETPGRP */
920 #ifdef HAVE_TCSETPGRP
921 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
922 (SCM port
, SCM pgid
),
923 "Set the foreground process group ID for the terminal used by the file\n"
924 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
925 "The calling process\n"
926 "must be a member of the same session as @var{pgid} and must have the same\n"
927 "controlling terminal. The return value is unspecified.")
928 #define FUNC_NAME s_scm_tcsetpgrp
932 port
= SCM_COERCE_OUTPORT (port
);
934 SCM_VALIDATE_OPFPORT (1, port
);
935 fd
= SCM_FPORT_FDES (port
);
936 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
938 return SCM_UNSPECIFIED
;
941 #endif /* HAVE_TCSETPGRP */
944 free_string_pointers (void *data
)
946 scm_i_free_string_pointers ((char **)data
);
949 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
950 (SCM filename
, SCM args
),
951 "Executes the file named by @var{path} as a new process image.\n"
952 "The remaining arguments are supplied to the process; from a C program\n"
953 "they are accessible as the @code{argv} argument to @code{main}.\n"
954 "Conventionally the first @var{arg} is the same as @var{path}.\n"
955 "All arguments must be strings.\n\n"
956 "If @var{arg} is missing, @var{path} is executed with a null\n"
957 "argument list, which may have system-dependent side-effects.\n\n"
958 "This procedure is currently implemented using the @code{execv} system\n"
959 "call, but we call it @code{execl} because of its Scheme calling interface.")
960 #define FUNC_NAME s_scm_execl
965 scm_dynwind_begin (0);
967 exec_file
= scm_to_locale_string (filename
);
968 scm_dynwind_free (exec_file
);
970 exec_argv
= scm_i_allocate_string_pointers (args
);
971 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
972 SCM_F_WIND_EXPLICITLY
);
976 /* extra "const" in mingw formals, provokes warning from gcc */
977 (const char * const *)
988 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
989 (SCM filename
, SCM args
),
990 "Similar to @code{execl}, however if\n"
991 "@var{filename} does not contain a slash\n"
992 "then the file to execute will be located by searching the\n"
993 "directories listed in the @code{PATH} environment variable.\n\n"
994 "This procedure is currently implemented using the @code{execvp} system\n"
995 "call, but we call it @code{execlp} because of its Scheme calling interface.")
996 #define FUNC_NAME s_scm_execlp
1001 scm_dynwind_begin (0);
1003 exec_file
= scm_to_locale_string (filename
);
1004 scm_dynwind_free (exec_file
);
1006 exec_argv
= scm_i_allocate_string_pointers (args
);
1007 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
1008 SCM_F_WIND_EXPLICITLY
);
1012 /* extra "const" in mingw formals, provokes warning from gcc */
1013 (const char * const *)
1025 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
1026 list strings the way environ_list_to_c gives. */
1028 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
1029 (SCM filename
, SCM env
, SCM args
),
1030 "Similar to @code{execl}, but the environment of the new process is\n"
1031 "specified by @var{env}, which must be a list of strings as returned by the\n"
1032 "@code{environ} procedure.\n\n"
1033 "This procedure is currently implemented using the @code{execve} system\n"
1034 "call, but we call it @code{execle} because of its Scheme calling interface.")
1035 #define FUNC_NAME s_scm_execle
1041 scm_dynwind_begin (0);
1043 exec_file
= scm_to_locale_string (filename
);
1044 scm_dynwind_free (exec_file
);
1046 exec_argv
= scm_i_allocate_string_pointers (args
);
1047 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
1048 SCM_F_WIND_EXPLICITLY
);
1050 exec_env
= scm_i_allocate_string_pointers (env
);
1051 scm_dynwind_unwind_handler (free_string_pointers
, exec_env
,
1052 SCM_F_WIND_EXPLICITLY
);
1056 /* extra "const" in mingw formals, provokes warning from gcc */
1057 (const char * const *)
1061 /* extra "const" in mingw formals, provokes warning from gcc */
1062 (const char * const *)
1074 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1076 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1077 "In the child the return value is 0. In the parent the return value is\n"
1078 "the integer process ID of the child.\n\n"
1079 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1080 "with the scsh fork.")
1081 #define FUNC_NAME s_scm_fork
1087 return scm_from_int (pid
);
1090 #endif /* HAVE_FORK */
1093 # include "win32-uname.h"
1096 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1097 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1099 "Return an object with some information about the computer\n"
1100 "system the program is running on.")
1101 #define FUNC_NAME s_scm_uname
1104 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1105 if (uname (&buf
) < 0)
1107 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1108 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1109 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1110 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1111 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1114 SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1119 #endif /* HAVE_UNAME */
1121 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1123 "If @var{env} is omitted, return the current environment (in the\n"
1124 "Unix sense) as a list of strings. Otherwise set the current\n"
1125 "environment, which is also the default environment for child\n"
1126 "processes, to the supplied list of strings. Each member of\n"
1127 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1128 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1129 "then the return value is unspecified.")
1130 #define FUNC_NAME s_scm_environ
1132 if (SCM_UNBNDP (env
))
1133 return scm_makfromstrs (-1, environ
);
1138 new_environ
= scm_i_allocate_string_pointers (env
);
1139 /* Free the old environment, except when called for the first
1143 static int first
= 1;
1145 scm_i_free_string_pointers (environ
);
1148 environ
= new_environ
;
1149 return SCM_UNSPECIFIED
;
1156 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1158 "Return a name in the file system that does not match any\n"
1159 "existing file. However there is no guarantee that another\n"
1160 "process will not create the file after @code{tmpnam} is called.\n"
1161 "Care should be taken if opening the file, e.g., use the\n"
1162 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1163 #define FUNC_NAME s_scm_tmpnam
1165 char name
[L_tmpnam
];
1168 SCM_SYSCALL (rv
= tmpnam (name
));
1170 /* not SCM_SYSERROR since errno probably not set. */
1171 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1172 return scm_from_locale_string (name
);
1178 #ifndef HAVE_MKSTEMP
1179 extern int mkstemp (char *);
1182 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1184 "Create a new unique file in the file system and return a new\n"
1185 "buffered port open for reading and writing to the file.\n"
1187 "@var{tmpl} is a string specifying where the file should be\n"
1188 "created: it must end with @samp{XXXXXX} and those @samp{X}s\n"
1189 "will be changed in the string to return the name of the file.\n"
1190 "(@code{port-filename} on the port also gives the name.)\n"
1192 "POSIX doesn't specify the permissions mode of the file, on GNU\n"
1193 "and most systems it's @code{#o600}. An application can use\n"
1194 "@code{chmod} to relax that if desired. For example\n"
1195 "@code{#o666} less @code{umask}, which is usual for ordinary\n"
1199 "(let ((port (mkstemp! (string-copy \"/tmp/myfile-XXXXXX\"))))\n"
1200 " (chmod port (logand #o666 (lognot (umask))))\n"
1203 #define FUNC_NAME s_scm_mkstemp
1208 scm_dynwind_begin (0);
1210 c_tmpl
= scm_to_locale_string (tmpl
);
1211 scm_dynwind_free (c_tmpl
);
1213 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1217 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1218 SCM_INUM0
, scm_string_length (tmpl
),
1222 return scm_fdes_to_port (rv
, "w+", tmpl
);
1226 SCM_DEFINE (scm_utime
, "utime", 1, 2, 0,
1227 (SCM pathname
, SCM actime
, SCM modtime
),
1228 "@code{utime} sets the access and modification times for the\n"
1229 "file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1230 "not supplied, then the current time is used. @var{actime} and\n"
1231 "@var{modtime} must be integer time values as returned by the\n"
1232 "@code{current-time} procedure.\n"
1234 "(utime \"foo\" (- (current-time) 3600))\n"
1236 "will set the access time to one hour in the past and the\n"
1237 "modification time to the current time.")
1238 #define FUNC_NAME s_scm_utime
1241 struct utimbuf utm_tmp
;
1243 if (SCM_UNBNDP (actime
))
1244 SCM_SYSCALL (time (&utm_tmp
.actime
));
1246 utm_tmp
.actime
= SCM_NUM2ULONG (2, actime
);
1248 if (SCM_UNBNDP (modtime
))
1249 SCM_SYSCALL (time (&utm_tmp
.modtime
));
1251 utm_tmp
.modtime
= SCM_NUM2ULONG (3, modtime
);
1253 STRING_SYSCALL (pathname
, c_pathname
,
1254 rv
= utime (c_pathname
, &utm_tmp
));
1257 return SCM_UNSPECIFIED
;
1261 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1262 (SCM path
, SCM how
),
1263 "Test accessibility of a file under the real UID and GID of the\n"
1264 "calling process. The return is @code{#t} if @var{path} exists\n"
1265 "and the permissions requested by @var{how} are all allowed, or\n"
1266 "@code{#f} if not.\n"
1268 "@var{how} is an integer which is one of the following values,\n"
1269 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1272 "Test for read permission.\n"
1275 "Test for write permission.\n"
1278 "Test for execute permission.\n"
1281 "Test for existence of the file. This is implied by each of the\n"
1282 "other tests, so there's no need to combine it with them.\n"
1285 "It's important to note that @code{access?} does not simply\n"
1286 "indicate what will happen on attempting to read or write a\n"
1287 "file. In normal circumstances it does, but in a set-UID or\n"
1288 "set-GID program it doesn't because @code{access?} tests the\n"
1289 "real ID, whereas an open or execute attempt uses the effective\n"
1292 "A program which will never run set-UID/GID can ignore the\n"
1293 "difference between real and effective IDs, but for maximum\n"
1294 "generality, especially in library functions, it's best not to\n"
1295 "use @code{access?} to predict the result of an open or execute,\n"
1296 "instead simply attempt that and catch any exception.\n"
1298 "The main use for @code{access?} is to let a set-UID/GID program\n"
1299 "determine what the invoking user would have been allowed to do,\n"
1300 "without the greater (or perhaps lesser) privileges afforded by\n"
1301 "the effective ID. For more on this, see ``Testing File\n"
1302 "Access'' in The GNU C Library Reference Manual.")
1303 #define FUNC_NAME s_scm_access
1307 WITH_STRING (path
, c_path
,
1308 rv
= access (c_path
, scm_to_int (how
)));
1309 return scm_from_bool (!rv
);
1313 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1315 "Return an integer representing the current process ID.")
1316 #define FUNC_NAME s_scm_getpid
1318 return scm_from_ulong (getpid ());
1322 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1324 "Modifies the environment of the current process, which is\n"
1325 "also the default environment inherited by child processes.\n\n"
1326 "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1327 "directly into the environment, replacing any existing environment string\n"
1329 "name matching @code{NAME}. If @var{string} does not contain an equal\n"
1330 "sign, then any existing string with name matching @var{string} will\n"
1332 "The return value is unspecified.")
1333 #define FUNC_NAME s_scm_putenv
1336 char *c_str
= scm_to_locale_string (str
);
1338 if (strchr (c_str
, '=') == NULL
)
1340 #ifdef HAVE_UNSETENV
1341 /* No '=' in argument means we should remove the variable from
1342 the environment. Not all putenvs understand this (for instance
1343 FreeBSD 4.8 doesn't). To be safe, we do it explicitely using
1348 /* On e.g. Win32 hosts putenv() called with 'name=' removes the
1349 environment variable 'name'. */
1351 size_t len
= strlen (c_str
);
1352 char *ptr
= scm_malloc (len
+ 2);
1353 strcpy (ptr
, c_str
);
1354 strcpy (ptr
+len
, "=");
1356 e
= errno
; free (ptr
); free (c_str
); errno
= e
;
1359 #endif /* !HAVE_UNSETENV */
1364 /* If str is "FOO=", ie. attempting to set an empty string, then
1365 we need to see if it's been successful. On MINGW, "FOO="
1366 means remove FOO from the environment. As a workaround, we
1367 set "FOO= ", ie. a space, and then modify the string returned
1368 by getenv. It's not enough just to modify the string we set,
1369 because MINGW putenv copies it. */
1372 size_t len
= strlen (c_str
);
1373 if (c_str
[len
-1] == '=')
1375 char *ptr
= scm_malloc (len
+2);
1376 strcpy (ptr
, c_str
);
1377 strcpy (ptr
+len
, " ");
1386 /* truncate to just the name */
1387 c_str
[len
-1] = '\0';
1388 ptr
= getenv (c_str
);
1391 return SCM_UNSPECIFIED
;
1394 #endif /* __MINGW32__ */
1396 /* Leave c_str in the environment. */
1398 rv
= putenv (c_str
);
1402 return SCM_UNSPECIFIED
;
1406 /* This mutex is used to serialize invocations of `setlocale ()' on non-GNU
1407 systems (i.e., systems where a reentrant locale API is not available). It
1408 is also acquired before calls to `nl_langinfo ()'. See `i18n.c' for
1410 scm_i_pthread_mutex_t scm_i_locale_mutex
= SCM_I_PTHREAD_MUTEX_INITIALIZER
;
1412 #ifdef HAVE_SETLOCALE
1414 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1415 (SCM category
, SCM locale
),
1416 "If @var{locale} is omitted, return the current value of the\n"
1417 "specified locale category as a system-dependent string.\n"
1418 "@var{category} should be specified using the values\n"
1419 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1421 "Otherwise the specified locale category is set to the string\n"
1422 "@var{locale} and the new value is returned as a\n"
1423 "system-dependent string. If @var{locale} is an empty string,\n"
1424 "the locale will be set using environment variables.")
1425 #define FUNC_NAME s_scm_setlocale
1431 scm_dynwind_begin (0);
1433 if (SCM_UNBNDP (locale
))
1439 clocale
= scm_to_locale_string (locale
);
1440 scm_dynwind_free (clocale
);
1443 c_category
= scm_i_to_lc_category (category
, 1);
1445 scm_i_pthread_mutex_lock (&scm_i_locale_mutex
);
1446 rv
= setlocale (c_category
, clocale
);
1447 scm_i_pthread_mutex_unlock (&scm_i_locale_mutex
);
1451 /* POSIX and C99 don't say anything about setlocale setting errno, so
1452 force a sensible value here. glibc leaves ENOENT, which would be
1453 fine, but it's not a documented feature. */
1458 /* Recompute the standard SRFI-14 character sets in a locale-dependent
1459 (actually charset-dependent) way. */
1460 scm_srfi_14_compute_char_sets ();
1463 return scm_from_locale_string (rv
);
1466 #endif /* HAVE_SETLOCALE */
1469 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1470 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1471 "Creates a new special file, such as a file corresponding to a device.\n"
1472 "@var{path} specifies the name of the file. @var{type} should\n"
1473 "be one of the following symbols:\n"
1474 "regular, directory, symlink, block-special, char-special,\n"
1475 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1476 "@var{dev} (an integer) specifies which device the special file refers\n"
1477 "to. Its exact interpretation depends on the kind of special file\n"
1478 "being created.\n\n"
1481 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1483 "The return value is unspecified.")
1484 #define FUNC_NAME s_scm_mknod
1490 SCM_VALIDATE_STRING (1, path
);
1491 SCM_VALIDATE_SYMBOL (2, type
);
1493 p
= scm_i_symbol_chars (type
);
1494 if (strcmp (p
, "regular") == 0)
1496 else if (strcmp (p
, "directory") == 0)
1499 /* systems without symlinks probably don't have S_IFLNK defined */
1500 else if (strcmp (p
, "symlink") == 0)
1503 else if (strcmp (p
, "block-special") == 0)
1505 else if (strcmp (p
, "char-special") == 0)
1507 else if (strcmp (p
, "fifo") == 0)
1510 else if (strcmp (p
, "socket") == 0)
1514 SCM_OUT_OF_RANGE (2, type
);
1516 STRING_SYSCALL (path
, c_path
,
1517 val
= mknod (c_path
,
1518 ctype
| scm_to_int (perms
),
1522 return SCM_UNSPECIFIED
;
1525 #endif /* HAVE_MKNOD */
1528 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1530 "Increment the priority of the current process by @var{incr}. A higher\n"
1531 "priority value means that the process runs less often.\n"
1532 "The return value is unspecified.")
1533 #define FUNC_NAME s_scm_nice
1535 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1536 from "prio-NZERO", so an error must be detected from errno changed */
1538 nice (scm_to_int (incr
));
1541 return SCM_UNSPECIFIED
;
1544 #endif /* HAVE_NICE */
1547 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1549 "Flush the operating system disk buffers.\n"
1550 "The return value is unspecified.")
1551 #define FUNC_NAME s_scm_sync
1554 return SCM_UNSPECIFIED
;
1557 #endif /* HAVE_SYNC */
1560 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1561 to avoid another thread overwriting it. A test program running crypt
1562 continuously in two threads can be quickly seen tripping this problem.
1563 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1565 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1566 slower (about 5x) than plain crypt if you pass an uninitialized data
1567 block each time. Presumably there's some one-time setups. The best way
1568 to use crypt_r for parallel execution in multiple threads would probably
1569 be to maintain a little pool of initialized crypt_data structures, take
1570 one and use it, then return it to the pool. That pool could be garbage
1571 collected so it didn't add permanently to memory use if only a few crypt
1572 calls are made. But we expect crypt will be used rarely, and even more
1573 rarely will there be any desire for lots of parallel execution on
1574 multiple cpus. So for now we don't bother with anything fancy, just
1578 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1579 (SCM key
, SCM salt
),
1580 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1581 "crypt(3) library call.")
1582 #define FUNC_NAME s_scm_crypt
1585 char *c_key
, *c_salt
, *c_ret
;
1587 scm_dynwind_begin (0);
1588 scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex
);
1590 c_key
= scm_to_locale_string (key
);
1591 scm_dynwind_free (c_key
);
1592 c_salt
= scm_to_locale_string (salt
);
1593 scm_dynwind_free (c_salt
);
1595 /* The Linux crypt(3) man page says crypt will return NULL and set errno
1596 on error. (Eg. ENOSYS if legal restrictions mean it cannot be
1598 c_ret
= crypt (c_key
, c_salt
);
1602 ret
= scm_from_locale_string (c_ret
);
1607 #endif /* HAVE_CRYPT */
1610 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1612 "Change the root directory to that specified in @var{path}.\n"
1613 "This directory will be used for path names beginning with\n"
1614 "@file{/}. The root directory is inherited by all children\n"
1615 "of the current process. Only the superuser may change the\n"
1617 #define FUNC_NAME s_scm_chroot
1621 WITH_STRING (path
, c_path
,
1622 rv
= chroot (c_path
));
1625 return SCM_UNSPECIFIED
;
1628 #endif /* HAVE_CHROOT */
1632 /* Wrapper function to supplying `getlogin()' under Windows. */
1633 static char * getlogin (void)
1635 static char user
[256];
1636 static unsigned long len
= 256;
1638 if (!GetUserName (user
, &len
))
1642 #endif /* __MINGW32__ */
1645 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1646 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1648 "Return a string containing the name of the user logged in on\n"
1649 "the controlling terminal of the process, or @code{#f} if this\n"
1650 "information cannot be obtained.")
1651 #define FUNC_NAME s_scm_getlogin
1658 return scm_from_locale_string (p
);
1661 #endif /* HAVE_GETLOGIN */
1664 SCM_DEFINE (scm_cuserid
, "cuserid", 0, 0, 0,
1666 "Return a string containing a user name associated with the\n"
1667 "effective user id of the process. Return @code{#f} if this\n"
1668 "information cannot be obtained.")
1669 #define FUNC_NAME s_scm_cuserid
1671 char buf
[L_cuserid
];
1677 return scm_from_locale_string (p
);
1680 #endif /* HAVE_CUSERID */
1682 #if HAVE_GETPRIORITY
1683 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1684 (SCM which
, SCM who
),
1685 "Return the scheduling priority of the process, process group\n"
1686 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1687 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1688 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1689 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1690 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1691 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1692 "denotes the current process, process group, or user. Return\n"
1693 "the highest priority (lowest numerical value) of any of the\n"
1694 "specified processes.")
1695 #define FUNC_NAME s_scm_getpriority
1697 int cwhich
, cwho
, ret
;
1699 cwhich
= scm_to_int (which
);
1700 cwho
= scm_to_int (who
);
1702 /* We have to clear errno and examine it later, because -1 is a
1703 legal return value for getpriority(). */
1705 ret
= getpriority (cwhich
, cwho
);
1708 return scm_from_int (ret
);
1711 #endif /* HAVE_GETPRIORITY */
1713 #if HAVE_SETPRIORITY
1714 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1715 (SCM which
, SCM who
, SCM prio
),
1716 "Set the scheduling priority of the process, process group\n"
1717 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1718 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1719 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1720 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1721 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1722 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1723 "denotes the current process, process group, or user.\n"
1724 "@var{prio} is a value in the range -20 and 20, the default\n"
1725 "priority is 0; lower priorities cause more favorable\n"
1726 "scheduling. Sets the priority of all of the specified\n"
1727 "processes. Only the super-user may lower priorities.\n"
1728 "The return value is not specified.")
1729 #define FUNC_NAME s_scm_setpriority
1731 int cwhich
, cwho
, cprio
;
1733 cwhich
= scm_to_int (which
);
1734 cwho
= scm_to_int (who
);
1735 cprio
= scm_to_int (prio
);
1737 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1739 return SCM_UNSPECIFIED
;
1742 #endif /* HAVE_SETPRIORITY */
1745 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
1747 "Display @var{prompt} to the standard error output and read\n"
1748 "a password from @file{/dev/tty}. If this file is not\n"
1749 "accessible, it reads from standard input. The password may be\n"
1750 "up to 127 characters in length. Additional characters and the\n"
1751 "terminating newline character are discarded. While reading\n"
1752 "the password, echoing and the generation of signals by special\n"
1753 "characters is disabled.")
1754 #define FUNC_NAME s_scm_getpass
1759 SCM_VALIDATE_STRING (1, prompt
);
1761 WITH_STRING (prompt
, c_prompt
,
1762 p
= getpass(c_prompt
));
1763 passwd
= scm_from_locale_string (p
);
1765 /* Clear out the password in the static buffer. */
1766 memset (p
, 0, strlen (p
));
1771 #endif /* HAVE_GETPASS */
1773 /* Wrapper function for flock() support under M$-Windows. */
1776 # include <sys/locking.h>
1779 /* Current MinGW package fails to define this. *sigh* */
1780 # define _LK_UNLCK 0
1787 static int flock (int fd
, int operation
)
1792 /* Disable invalid arguments. */
1793 if (((operation
& (LOCK_EX
| LOCK_SH
)) == (LOCK_EX
| LOCK_SH
)) ||
1794 ((operation
& (LOCK_EX
| LOCK_UN
)) == (LOCK_EX
| LOCK_UN
)) ||
1795 ((operation
& (LOCK_SH
| LOCK_UN
)) == (LOCK_SH
| LOCK_UN
)))
1801 /* Determine mode of operation and discard unsupported ones. */
1802 if (operation
== (LOCK_NB
| LOCK_EX
))
1803 operation
= _LK_NBLCK
;
1804 else if (operation
& LOCK_UN
)
1805 operation
= _LK_UNLCK
;
1806 else if (operation
== LOCK_EX
)
1807 operation
= _LK_LOCK
;
1814 /* Save current file pointer and seek to beginning. */
1815 if ((pos
= lseek (fd
, 0, SEEK_CUR
)) == -1 || (len
= filelength (fd
)) == -1)
1817 lseek (fd
, 0L, SEEK_SET
);
1819 /* Deadlock if necessary. */
1822 ret
= _locking (fd
, operation
, len
);
1824 while (ret
== -1 && errno
== EDEADLOCK
);
1826 /* Produce meaningful error message. */
1827 if (errno
== EACCES
&& operation
== _LK_NBLCK
)
1832 /* Return to saved file position pointer. */
1833 lseek (fd
, pos
, SEEK_SET
);
1837 #endif /* __MINGW32__ */
1839 #if HAVE_FLOCK || defined (__MINGW32__)
1840 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
1841 (SCM file
, SCM operation
),
1842 "Apply or remove an advisory lock on an open file.\n"
1843 "@var{operation} specifies the action to be done:\n"
1846 "Shared lock. More than one process may hold a shared lock\n"
1847 "for a given file at a given time.\n"
1850 "Exclusive lock. Only one process may hold an exclusive lock\n"
1851 "for a given file at a given time.\n"
1854 "Unlock the file.\n"
1857 "Don't block when locking. This is combined with one of the\n"
1858 "other operations using @code{logior}. If @code{flock} would\n"
1859 "block an @code{EWOULDBLOCK} error is thrown.\n"
1862 "The return value is not specified. @var{file} may be an open\n"
1863 "file descriptor or an open file descriptor port.\n"
1865 "Note that @code{flock} does not lock files across NFS.")
1866 #define FUNC_NAME s_scm_flock
1870 if (scm_is_integer (file
))
1871 fdes
= scm_to_int (file
);
1874 SCM_VALIDATE_OPFPORT (2, file
);
1876 fdes
= SCM_FPORT_FDES (file
);
1878 if (flock (fdes
, scm_to_int (operation
)) == -1)
1880 return SCM_UNSPECIFIED
;
1883 #endif /* HAVE_FLOCK */
1885 #if HAVE_SETHOSTNAME
1886 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
1888 "Set the host name of the current processor to @var{name}. May\n"
1889 "only be used by the superuser. The return value is not\n"
1891 #define FUNC_NAME s_scm_sethostname
1895 WITH_STRING (name
, c_name
,
1896 rv
= sethostname (c_name
, strlen(c_name
)));
1899 return SCM_UNSPECIFIED
;
1902 #endif /* HAVE_SETHOSTNAME */
1905 #if HAVE_GETHOSTNAME
1906 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
1908 "Return the host name of the current processor.")
1909 #define FUNC_NAME s_scm_gethostname
1911 #ifdef MAXHOSTNAMELEN
1913 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
1914 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
1915 const int len
= MAXHOSTNAMELEN
+ 1;
1916 char *const p
= scm_malloc (len
);
1917 const int res
= gethostname (p
, len
);
1919 scm_dynwind_begin (0);
1920 scm_dynwind_unwind_handler (free
, p
, 0);
1924 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
1925 * large enough. SUSv2 specifies 255 maximum too, apparently. */
1930 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
1932 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
1933 * which may reflect a particular kernel configuration.
1934 * Must watch out for this existing but giving -1, as happens for instance
1935 * in gnu/linux glibc 2.3.2. */
1937 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
1944 p
= scm_malloc (len
);
1946 scm_dynwind_begin (0);
1947 scm_dynwind_unwind_handler (free
, p
, 0);
1949 res
= gethostname (p
, len
);
1950 while (res
== -1 && errno
== ENAMETOOLONG
)
1954 /* scm_realloc may throw an exception. */
1955 p
= scm_realloc (p
, len
);
1956 res
= gethostname (p
, len
);
1963 const int save_errno
= errno
;
1965 /* No guile exceptions can occur before we have freed p's memory. */
1974 /* scm_from_locale_string may throw an exception. */
1975 const SCM name
= scm_from_locale_string (p
);
1977 /* No guile exceptions can occur before we have freed p's memory. */
1985 #endif /* HAVE_GETHOSTNAME */
1991 scm_add_feature ("posix");
1993 scm_add_feature ("EIDs");
1996 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
1999 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
2002 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
2005 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
2008 /* access() symbols. */
2009 scm_c_define ("R_OK", scm_from_int (R_OK
));
2010 scm_c_define ("W_OK", scm_from_int (W_OK
));
2011 scm_c_define ("X_OK", scm_from_int (X_OK
));
2012 scm_c_define ("F_OK", scm_from_int (F_OK
));
2015 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
2018 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
2021 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
2024 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
2027 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
2030 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
2033 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
2036 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
2039 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
2042 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
2045 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
2047 #ifdef LC_MEASUREMENT
2048 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
2050 #ifdef LC_IDENTIFICATION
2051 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
2054 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
2058 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
2061 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
2064 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
2068 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
2071 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
2074 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
2077 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
2080 #include "libguile/cpp_sig_symbols.c"
2081 #include "libguile/posix.x"