1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2005 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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/vectors.h"
38 #include "libguile/lang.h"
40 #include "libguile/validate.h"
41 #include "libguile/posix.h"
42 #include "libguile/i18n.h"
48 #ifdef TIME_WITH_SYS_TIME
49 # include <sys/time.h>
53 # include <sys/time.h>
63 extern char *ttyname();
67 #ifdef LIBC_H_WITH_UNISTD_H
71 #include <sys/types.h>
81 #ifdef HAVE_WINSOCK2_H
86 /* Some defines for Windows here. */
88 # define pipe(fd) _pipe (fd, 256, O_BINARY)
89 #endif /* __MINGW32__ */
92 # include <sys/wait.h>
95 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
98 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
103 extern char ** environ
;
108 #ifdef HAVE_SYS_UTSNAME_H
109 #include <sys/utsname.h>
112 #ifdef HAVE_SETLOCALE
121 #include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
124 #ifdef HAVE_SYS_PARAM_H
125 #include <sys/param.h> /* for MAXHOSTNAMELEN */
128 #if HAVE_SYS_RESOURCE_H
129 # include <sys/resource.h>
133 # include <sys/file.h>
136 #if HAVE_CRT_EXTERNS_H
137 #include <crt_externs.h> /* for Darwin _NSGetEnviron */
140 /* Some Unix systems don't define these. CPP hair is dangerous, but
141 this seems safe enough... */
158 /* On NextStep, <utime.h> doesn't define struct utime, unless we
159 #define _POSIX_SOURCE before #including it. I think this is less
160 of a kludge than defining struct utimbuf ourselves. */
161 #ifdef UTIMBUF_NEEDS_POSIX
162 #define _POSIX_SOURCE
165 #ifdef HAVE_SYS_UTIME_H
166 #include <sys/utime.h>
173 /* Please don't add any more #includes or #defines here. The hack
174 above means that _POSIX_SOURCE may be #defined, which will
175 encourage header files to do strange things.
177 FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
179 FIXME: Probably should do all the includes first, then all the fallback
180 declarations and defines, in case things are not in the header we
186 /* On Apple Darwin in a shared library there's no "environ" to access
187 directly, instead the address of that variable must be obtained with
189 #if HAVE__NSGETENVIRON && defined (PIC)
190 #define environ (*_NSGetEnviron())
195 /* Two often used patterns
198 #define WITH_STRING(str,cstr,code) \
200 char *cstr = scm_to_locale_string (str); \
205 #define STRING_SYSCALL(str,cstr,code) \
208 char *cstr = scm_to_locale_string (str); \
209 SCM_SYSCALL (code); \
210 eno = errno; free (cstr); errno = eno; \
215 SCM_SYMBOL (sym_read_pipe
, "read pipe");
216 SCM_SYMBOL (sym_write_pipe
, "write pipe");
218 SCM_DEFINE (scm_pipe
, "pipe", 0, 0, 0,
220 "Return a newly created pipe: a pair of ports which are linked\n"
221 "together on the local machine. The @emph{car} is the input\n"
222 "port and the @emph{cdr} is the output port. Data written (and\n"
223 "flushed) to the output port can be read from the input port.\n"
224 "Pipes are commonly used for communication with a newly forked\n"
225 "child process. The need to flush the output port can be\n"
226 "avoided by making it unbuffered using @code{setvbuf}.\n"
228 "Writes occur atomically provided the size of the data in bytes\n"
229 "is not greater than the value of @code{PIPE_BUF}. Note that\n"
230 "the output port is likely to block if too much data (typically\n"
231 "equal to @code{PIPE_BUF}) has been written but not yet read\n"
232 "from the input port.")
233 #define FUNC_NAME s_scm_pipe
242 p_rd
= scm_fdes_to_port (fd
[0], "r", sym_read_pipe
);
243 p_wt
= scm_fdes_to_port (fd
[1], "w", sym_write_pipe
);
244 return scm_cons (p_rd
, p_wt
);
249 #ifdef HAVE_GETGROUPS
250 SCM_DEFINE (scm_getgroups
, "getgroups", 0, 0, 0,
252 "Return a vector of integers representing the current\n"
253 "supplementary group IDs.")
254 #define FUNC_NAME s_scm_getgroups
261 ngroups
= getgroups (0, NULL
);
265 size
= ngroups
* sizeof (GETGROUPS_T
);
266 groups
= scm_malloc (size
);
267 getgroups (ngroups
, groups
);
269 result
= scm_c_make_vector (ngroups
, SCM_BOOL_F
);
270 while (--ngroups
>= 0)
271 SCM_SIMPLE_VECTOR_SET (result
, ngroups
, scm_from_ulong (groups
[ngroups
]));
279 #ifdef HAVE_SETGROUPS
280 SCM_DEFINE (scm_setgroups
, "setgroups", 1, 0, 0,
282 "Set the current set of supplementary group IDs to the integers\n"
283 "in the given vector @var{vec}. The return value is\n"
286 "Generally only the superuser can set the process group IDs.")
287 #define FUNC_NAME s_scm_setgroups
296 SCM_VALIDATE_VECTOR (SCM_ARG1
, group_vec
);
298 ngroups
= SCM_SIMPLE_VECTOR_LENGTH (group_vec
);
300 /* validate before allocating, so we don't have to worry about leaks */
301 for (i
= 0; i
< ngroups
; i
++)
303 unsigned long ulong_gid
;
305 SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
),
308 if (gid
!= ulong_gid
)
309 SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
312 size
= ngroups
* sizeof (GETGROUPS_T
);
313 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
314 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
315 groups
= scm_malloc (size
);
316 for(i
= 0; i
< ngroups
; i
++)
317 groups
[i
] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
319 result
= setgroups (ngroups
, groups
);
320 save_errno
= errno
; /* don't let free() touch errno */
325 return SCM_UNSPECIFIED
;
331 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
333 "Look up an entry in the user database. @var{obj} can be an integer,\n"
334 "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
335 "or getpwent respectively.")
336 #define FUNC_NAME s_scm_getpwuid
338 struct passwd
*entry
;
340 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
341 if (SCM_UNBNDP (user
) || scm_is_false (user
))
343 SCM_SYSCALL (entry
= getpwent ());
349 else if (scm_is_integer (user
))
351 entry
= getpwuid (scm_to_int (user
));
355 WITH_STRING (user
, c_user
,
356 entry
= getpwnam (c_user
));
359 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
361 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
362 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
363 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
364 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
365 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
367 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (""));
369 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
370 if (!entry
->pw_shell
)
371 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (""));
373 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
377 #endif /* HAVE_GETPWENT */
381 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
383 "If called with a true argument, initialize or reset the password data\n"
384 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
385 "@code{endpwent} procedures are implemented on top of this.")
386 #define FUNC_NAME s_scm_setpwent
388 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
392 return SCM_UNSPECIFIED
;
399 /* Combines getgrgid and getgrnam. */
400 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
402 "Look up an entry in the group database. @var{obj} can be an integer,\n"
403 "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
404 "or getgrent respectively.")
405 #define FUNC_NAME s_scm_getgrgid
408 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
410 if (SCM_UNBNDP (name
) || scm_is_false (name
))
412 SCM_SYSCALL (entry
= getgrent ());
418 else if (scm_is_integer (name
))
419 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
421 STRING_SYSCALL (name
, c_name
,
422 entry
= getgrnam (c_name
));
426 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
427 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
428 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
429 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
436 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
438 "If called with a true argument, initialize or reset the group data\n"
439 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
440 "@code{endgrent} procedures are implemented on top of this.")
441 #define FUNC_NAME s_scm_setgrent
443 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
447 return SCM_UNSPECIFIED
;
450 #endif /* HAVE_GETGRENT */
453 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
455 "Sends a signal to the specified process or group of processes.\n\n"
456 "@var{pid} specifies the processes to which the signal is sent:\n\n"
458 "@item @var{pid} greater than 0\n"
459 "The process whose identifier is @var{pid}.\n"
460 "@item @var{pid} equal to 0\n"
461 "All processes in the current process group.\n"
462 "@item @var{pid} less than -1\n"
463 "The process group whose identifier is -@var{pid}\n"
464 "@item @var{pid} equal to -1\n"
465 "If the process is privileged, all processes except for some special\n"
466 "system processes. Otherwise, all processes with the current effective\n"
469 "@var{sig} should be specified using a variable corresponding to\n"
470 "the Unix symbolic name, e.g.,\n\n"
475 "Interrupt signal.\n"
477 #define FUNC_NAME s_scm_kill
479 /* Signal values are interned in scm_init_posix(). */
481 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
483 if (scm_to_int (pid
) == getpid ())
484 if (raise (scm_to_int (sig
)) != 0)
487 return SCM_UNSPECIFIED
;
492 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
493 (SCM pid
, SCM options
),
494 "This procedure collects status information from a child process which\n"
495 "has terminated or (optionally) stopped. Normally it will\n"
496 "suspend the calling process until this can be done. If more than one\n"
497 "child process is eligible then one will be chosen by the operating system.\n\n"
498 "The value of @var{pid} determines the behaviour:\n\n"
500 "@item @var{pid} greater than 0\n"
501 "Request status information from the specified child process.\n"
502 "@item @var{pid} equal to -1 or WAIT_ANY\n"
503 "Request status information for any child process.\n"
504 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
505 "Request status information for any child process in the current process\n"
507 "@item @var{pid} less than -1\n"
508 "Request status information for any child process whose process group ID\n"
511 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
512 "values of zero or more of the following variables:\n\n"
514 "Return immediately even if there are no child processes to be collected.\n"
516 "@defvar WUNTRACED\n"
517 "Report status information for stopped processes as well as terminated\n"
520 "The return value is a pair containing:\n\n"
523 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
524 "specified and no process was collected.\n"
526 "The integer status value.\n"
528 #define FUNC_NAME s_scm_waitpid
533 if (SCM_UNBNDP (options
))
537 /* Flags are interned in scm_init_posix. */
538 ioptions
= scm_to_int (options
);
540 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
543 return scm_cons (scm_from_int (i
), scm_from_int (status
));
546 #endif /* HAVE_WAITPID */
549 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
551 "Return the exit status value, as would be set if a process\n"
552 "ended normally through a call to @code{exit} or @code{_exit},\n"
553 "if any, otherwise @code{#f}.")
554 #define FUNC_NAME s_scm_status_exit_val
558 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
560 lstatus
= scm_to_int (status
);
561 if (WIFEXITED (lstatus
))
562 return (scm_from_int (WEXITSTATUS (lstatus
)));
568 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
570 "Return the signal number which terminated the process, if any,\n"
571 "otherwise @code{#f}.")
572 #define FUNC_NAME s_scm_status_term_sig
576 lstatus
= scm_to_int (status
);
577 if (WIFSIGNALED (lstatus
))
578 return scm_from_int (WTERMSIG (lstatus
));
584 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
586 "Return the signal number which stopped the process, if any,\n"
587 "otherwise @code{#f}.")
588 #define FUNC_NAME s_scm_status_stop_sig
592 lstatus
= scm_to_int (status
);
593 if (WIFSTOPPED (lstatus
))
594 return scm_from_int (WSTOPSIG (lstatus
));
599 #endif /* __MINGW32__ */
602 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
604 "Return an integer representing the process ID of the parent\n"
606 #define FUNC_NAME s_scm_getppid
608 return scm_from_int (getppid ());
611 #endif /* HAVE_GETPPID */
615 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
617 "Return an integer representing the current real user ID.")
618 #define FUNC_NAME s_scm_getuid
620 return scm_from_int (getuid ());
626 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
628 "Return an integer representing the current real group ID.")
629 #define FUNC_NAME s_scm_getgid
631 return scm_from_int (getgid ());
637 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
639 "Return an integer representing the current effective user ID.\n"
640 "If the system does not support effective IDs, then the real ID\n"
641 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
642 "system supports effective IDs.")
643 #define FUNC_NAME s_scm_geteuid
646 return scm_from_int (geteuid ());
648 return scm_from_int (getuid ());
654 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
656 "Return an integer representing the current effective group ID.\n"
657 "If the system does not support effective IDs, then the real ID\n"
658 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
659 "system supports effective IDs.")
660 #define FUNC_NAME s_scm_getegid
663 return scm_from_int (getegid ());
665 return scm_from_int (getgid ());
671 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
673 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
674 "the process has appropriate privileges.\n"
675 "The return value is unspecified.")
676 #define FUNC_NAME s_scm_setuid
678 if (setuid (scm_to_int (id
)) != 0)
680 return SCM_UNSPECIFIED
;
684 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
686 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
687 "the process has appropriate privileges.\n"
688 "The return value is unspecified.")
689 #define FUNC_NAME s_scm_setgid
691 if (setgid (scm_to_int (id
)) != 0)
693 return SCM_UNSPECIFIED
;
697 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
699 "Sets the effective user ID to the integer @var{id}, provided the process\n"
700 "has appropriate privileges. If effective IDs are not supported, the\n"
701 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
702 "system supports effective IDs.\n"
703 "The return value is unspecified.")
704 #define FUNC_NAME s_scm_seteuid
709 rv
= seteuid (scm_to_int (id
));
711 rv
= setuid (scm_to_int (id
));
715 return SCM_UNSPECIFIED
;
718 #endif /* __MINGW32__ */
722 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
724 "Sets the effective group ID to the integer @var{id}, provided the process\n"
725 "has appropriate privileges. If effective IDs are not supported, the\n"
726 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
727 "system supports effective IDs.\n"
728 "The return value is unspecified.")
729 #define FUNC_NAME s_scm_setegid
734 rv
= setegid (scm_to_int (id
));
736 rv
= setgid (scm_to_int (id
));
740 return SCM_UNSPECIFIED
;
748 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
750 "Return an integer representing the current process group ID.\n"
751 "This is the POSIX definition, not BSD.")
752 #define FUNC_NAME s_scm_getpgrp
755 fn
= (int (*) ()) getpgrp
;
756 return scm_from_int (fn (0));
759 #endif /* HAVE_GETPGRP */
763 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
765 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
766 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
768 "Fails on systems that do not support job control.\n"
769 "The return value is unspecified.")
770 #define FUNC_NAME s_scm_setpgid
772 /* FIXME(?): may be known as setpgrp. */
773 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
775 return SCM_UNSPECIFIED
;
778 #endif /* HAVE_SETPGID */
781 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
783 "Creates a new session. The current process becomes the session leader\n"
784 "and is put in a new process group. The process will be detached\n"
785 "from its controlling terminal if it has one.\n"
786 "The return value is an integer representing the new process group ID.")
787 #define FUNC_NAME s_scm_setsid
789 pid_t sid
= setsid ();
792 return SCM_UNSPECIFIED
;
795 #endif /* HAVE_SETSID */
798 /* ttyname returns its result in a single static buffer, hence
799 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
800 continuously calling ttyname will otherwise get an overwrite quite
803 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
804 there's probably little to be gained in either speed or parallelism. */
807 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
809 "Return a string with the name of the serial terminal device\n"
810 "underlying @var{port}.")
811 #define FUNC_NAME s_scm_ttyname
817 port
= SCM_COERCE_OUTPORT (port
);
818 SCM_VALIDATE_OPPORT (1, port
);
819 if (!SCM_FPORTP (port
))
821 fd
= SCM_FPORT_FDES (port
);
823 scm_mutex_lock (&scm_i_misc_mutex
);
824 SCM_SYSCALL (result
= ttyname (fd
));
826 ret
= scm_from_locale_string (result
);
827 scm_mutex_unlock (&scm_i_misc_mutex
);
837 #endif /* HAVE_TTYNAME */
840 /* For thread safety "buf" is used instead of NULL for the ctermid static
841 buffer. Actually it's unlikely the controlling terminal will change
842 during program execution, and indeed on glibc (2.3.2) it's always just
843 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
844 safety everywhere. */
846 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
848 "Return a string containing the file name of the controlling\n"
849 "terminal for the current process.")
850 #define FUNC_NAME s_scm_ctermid
853 char *result
= ctermid (buf
);
856 return scm_from_locale_string (result
);
859 #endif /* HAVE_CTERMID */
861 #ifdef HAVE_TCGETPGRP
862 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
864 "Return the process group ID of the foreground process group\n"
865 "associated with the terminal open on the file descriptor\n"
866 "underlying @var{port}.\n"
868 "If there is no foreground process group, the return value is a\n"
869 "number greater than 1 that does not match the process group ID\n"
870 "of any existing process group. This can happen if all of the\n"
871 "processes in the job that was formerly the foreground job have\n"
872 "terminated, and no other job has yet been moved into the\n"
874 #define FUNC_NAME s_scm_tcgetpgrp
879 port
= SCM_COERCE_OUTPORT (port
);
881 SCM_VALIDATE_OPFPORT (1, port
);
882 fd
= SCM_FPORT_FDES (port
);
883 if ((pgid
= tcgetpgrp (fd
)) == -1)
885 return scm_from_int (pgid
);
888 #endif /* HAVE_TCGETPGRP */
890 #ifdef HAVE_TCSETPGRP
891 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
892 (SCM port
, SCM pgid
),
893 "Set the foreground process group ID for the terminal used by the file\n"
894 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
895 "The calling process\n"
896 "must be a member of the same session as @var{pgid} and must have the same\n"
897 "controlling terminal. The return value is unspecified.")
898 #define FUNC_NAME s_scm_tcsetpgrp
902 port
= SCM_COERCE_OUTPORT (port
);
904 SCM_VALIDATE_OPFPORT (1, port
);
905 fd
= SCM_FPORT_FDES (port
);
906 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
908 return SCM_UNSPECIFIED
;
911 #endif /* HAVE_TCSETPGRP */
914 free_string_pointers (void *data
)
916 scm_i_free_string_pointers ((char **)data
);
919 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
920 (SCM filename
, SCM args
),
921 "Executes the file named by @var{path} as a new process image.\n"
922 "The remaining arguments are supplied to the process; from a C program\n"
923 "they are accessible as the @code{argv} argument to @code{main}.\n"
924 "Conventionally the first @var{arg} is the same as @var{path}.\n"
925 "All arguments must be strings.\n\n"
926 "If @var{arg} is missing, @var{path} is executed with a null\n"
927 "argument list, which may have system-dependent side-effects.\n\n"
928 "This procedure is currently implemented using the @code{execv} system\n"
929 "call, but we call it @code{execl} because of its Scheme calling interface.")
930 #define FUNC_NAME s_scm_execl
937 exec_file
= scm_to_locale_string (filename
);
938 scm_frame_free (exec_file
);
940 exec_argv
= scm_i_allocate_string_pointers (args
);
941 scm_frame_unwind_handler (free_string_pointers
, exec_argv
,
942 SCM_F_WIND_EXPLICITLY
);
944 execv (exec_file
, exec_argv
);
953 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
954 (SCM filename
, SCM args
),
955 "Similar to @code{execl}, however if\n"
956 "@var{filename} does not contain a slash\n"
957 "then the file to execute will be located by searching the\n"
958 "directories listed in the @code{PATH} environment variable.\n\n"
959 "This procedure is currently implemented using the @code{execvp} system\n"
960 "call, but we call it @code{execlp} because of its Scheme calling interface.")
961 #define FUNC_NAME s_scm_execlp
968 exec_file
= scm_to_locale_string (filename
);
969 scm_frame_free (exec_file
);
971 exec_argv
= scm_i_allocate_string_pointers (args
);
972 scm_frame_unwind_handler (free_string_pointers
, exec_argv
,
973 SCM_F_WIND_EXPLICITLY
);
975 execvp (exec_file
, exec_argv
);
985 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
986 list strings the way environ_list_to_c gives. */
988 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
989 (SCM filename
, SCM env
, SCM args
),
990 "Similar to @code{execl}, but the environment of the new process is\n"
991 "specified by @var{env}, which must be a list of strings as returned by the\n"
992 "@code{environ} procedure.\n\n"
993 "This procedure is currently implemented using the @code{execve} system\n"
994 "call, but we call it @code{execle} because of its Scheme calling interface.")
995 #define FUNC_NAME s_scm_execle
1001 scm_frame_begin (0);
1003 exec_file
= scm_to_locale_string (filename
);
1004 scm_frame_free (exec_file
);
1006 exec_argv
= scm_i_allocate_string_pointers (args
);
1007 scm_frame_unwind_handler (free_string_pointers
, exec_argv
,
1008 SCM_F_WIND_EXPLICITLY
);
1010 exec_env
= scm_i_allocate_string_pointers (env
);
1011 scm_frame_unwind_handler (free_string_pointers
, exec_env
,
1012 SCM_F_WIND_EXPLICITLY
);
1014 execve (exec_file
, exec_argv
, exec_env
);
1024 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1026 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1027 "In the child the return value is 0. In the parent the return value is\n"
1028 "the integer process ID of the child.\n\n"
1029 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1030 "with the scsh fork.")
1031 #define FUNC_NAME s_scm_fork
1037 return scm_from_int (pid
);
1040 #endif /* HAVE_FORK */
1043 # include "win32-uname.h"
1046 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1047 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1049 "Return an object with some information about the computer\n"
1050 "system the program is running on.")
1051 #define FUNC_NAME s_scm_uname
1054 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1055 if (uname (&buf
) < 0)
1057 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1058 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1059 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1060 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1061 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1064 SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1069 #endif /* HAVE_UNAME */
1071 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1073 "If @var{env} is omitted, return the current environment (in the\n"
1074 "Unix sense) as a list of strings. Otherwise set the current\n"
1075 "environment, which is also the default environment for child\n"
1076 "processes, to the supplied list of strings. Each member of\n"
1077 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1078 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1079 "then the return value is unspecified.")
1080 #define FUNC_NAME s_scm_environ
1082 if (SCM_UNBNDP (env
))
1083 return scm_makfromstrs (-1, environ
);
1088 new_environ
= scm_i_allocate_string_pointers (env
);
1089 /* Free the old environment, except when called for the first
1093 static int first
= 1;
1095 scm_i_free_string_pointers (environ
);
1098 environ
= new_environ
;
1099 return SCM_UNSPECIFIED
;
1106 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1108 "Return a name in the file system that does not match any\n"
1109 "existing file. However there is no guarantee that another\n"
1110 "process will not create the file after @code{tmpnam} is called.\n"
1111 "Care should be taken if opening the file, e.g., use the\n"
1112 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1113 #define FUNC_NAME s_scm_tmpnam
1115 char name
[L_tmpnam
];
1118 SCM_SYSCALL (rv
= tmpnam (name
));
1120 /* not SCM_SYSERROR since errno probably not set. */
1121 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1122 return scm_from_locale_string (name
);
1128 #ifndef HAVE_MKSTEMP
1129 extern int mkstemp (char *);
1132 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1134 "Create a new unique file in the file system and returns a new\n"
1135 "buffered port open for reading and writing to the file.\n"
1137 "@var{tmpl} is a string specifying where the file should be\n"
1138 "created: it must end with @samp{XXXXXX} and will be changed in\n"
1139 "place to return the name of the temporary file.\n"
1141 "The file is created with mode @code{0600}, which means read and\n"
1142 "write for the owner only. @code{chmod} can be used to change\n"
1144 #define FUNC_NAME s_scm_mkstemp
1149 scm_frame_begin (0);
1151 c_tmpl
= scm_to_locale_string (tmpl
);
1152 scm_frame_free (c_tmpl
);
1154 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1158 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1159 SCM_INUM0
, scm_string_length (tmpl
),
1163 return scm_fdes_to_port (rv
, "w+", tmpl
);
1167 SCM_DEFINE (scm_utime
, "utime", 1, 2, 0,
1168 (SCM pathname
, SCM actime
, SCM modtime
),
1169 "@code{utime} sets the access and modification times for the\n"
1170 "file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1171 "not supplied, then the current time is used. @var{actime} and\n"
1172 "@var{modtime} must be integer time values as returned by the\n"
1173 "@code{current-time} procedure.\n"
1175 "(utime \"foo\" (- (current-time) 3600))\n"
1177 "will set the access time to one hour in the past and the\n"
1178 "modification time to the current time.")
1179 #define FUNC_NAME s_scm_utime
1182 struct utimbuf utm_tmp
;
1184 if (SCM_UNBNDP (actime
))
1185 SCM_SYSCALL (time (&utm_tmp
.actime
));
1187 utm_tmp
.actime
= SCM_NUM2ULONG (2, actime
);
1189 if (SCM_UNBNDP (modtime
))
1190 SCM_SYSCALL (time (&utm_tmp
.modtime
));
1192 utm_tmp
.modtime
= SCM_NUM2ULONG (3, modtime
);
1194 STRING_SYSCALL (pathname
, c_pathname
,
1195 rv
= utime (c_pathname
, &utm_tmp
));
1198 return SCM_UNSPECIFIED
;
1202 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1203 (SCM path
, SCM how
),
1204 "Test accessibility of a file under the real UID and GID of the\n"
1205 "calling process. The return is @code{#t} if @var{path} exists\n"
1206 "and the permissions requested by @var{how} are all allowed, or\n"
1207 "@code{#f} if not.\n"
1209 "@var{how} is an integer which is one of the following values,\n"
1210 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1213 "Test for read permission.\n"
1216 "Test for write permission.\n"
1219 "Test for execute permission.\n"
1222 "Test for existence of the file. This is implied by each of the\n"
1223 "other tests, so there's no need to combine it with them.\n"
1226 "It's important to note that @code{access?} does not simply\n"
1227 "indicate what will happen on attempting to read or write a\n"
1228 "file. In normal circumstances it does, but in a set-UID or\n"
1229 "set-GID program it doesn't because @code{access?} tests the\n"
1230 "real ID, whereas an open or execute attempt uses the effective\n"
1233 "A program which will never run set-UID/GID can ignore the\n"
1234 "difference between real and effective IDs, but for maximum\n"
1235 "generality, especially in library functions, it's best not to\n"
1236 "use @code{access?} to predict the result of an open or execute,\n"
1237 "instead simply attempt that and catch any exception.\n"
1239 "The main use for @code{access?} is to let a set-UID/GID program\n"
1240 "determine what the invoking user would have been allowed to do,\n"
1241 "without the greater (or perhaps lesser) privileges afforded by\n"
1242 "the effective ID. For more on this, see ``Testing File\n"
1243 "Access'' in The GNU C Library Reference Manual.")
1244 #define FUNC_NAME s_scm_access
1248 WITH_STRING (path
, c_path
,
1249 rv
= access (c_path
, scm_to_int (how
)));
1250 return scm_from_bool (!rv
);
1254 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1256 "Return an integer representing the current process ID.")
1257 #define FUNC_NAME s_scm_getpid
1259 return scm_from_ulong (getpid ());
1263 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1265 "Modifies the environment of the current process, which is\n"
1266 "also the default environment inherited by child processes.\n\n"
1267 "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1268 "directly into the environment, replacing any existing environment string\n"
1270 "name matching @code{NAME}. If @var{string} does not contain an equal\n"
1271 "sign, then any existing string with name matching @var{string} will\n"
1273 "The return value is unspecified.")
1274 #define FUNC_NAME s_scm_putenv
1277 char *c_str
= scm_to_locale_string (str
);
1279 size_t len
= strlen (c_str
);
1282 if (strchr (c_str
, '=') == NULL
)
1284 #ifdef HAVE_UNSETENV
1285 /* No '=' in argument means we should remove the variable from
1286 the environment. Not all putenvs understand this (for instance
1287 FreeBSD 4.8 doesn't). To be safe, we do it explicitely using
1292 /* On e.g. Win32 hosts putenv() called with 'name=' removes the
1293 environment variable 'name'. */
1295 char *ptr
= scm_malloc (len
+ 2);
1296 strcpy (ptr
, c_str
);
1297 strcpy (ptr
+len
, "=");
1299 e
= errno
; free (ptr
); free (c_str
); errno
= e
;
1302 #endif /* !HAVE_UNSETENV */
1307 /* If str is "FOO=", ie. attempting to set an empty string, then
1308 we need to see if it's been successful. On MINGW, "FOO="
1309 means remove FOO from the environment. As a workaround, we
1310 set "FOO= ", ie. a space, and then modify the string returned
1311 by getenv. It's not enough just to modify the string we set,
1312 because MINGW putenv copies it. */
1314 if (c_str
[len
-1] == '=')
1316 char *ptr
= scm_malloc (len
+2);
1317 strcpy (ptr
, c_str
);
1318 strcpy (ptr
+len
, " ");
1327 /* truncate to just the name */
1328 c_str
[len
-1] = '\0';
1329 ptr
= getenv (c_str
);
1332 return SCM_UNSPECIFIED
;
1334 #endif /* __MINGW32__ */
1336 /* Leave c_str in the environment. */
1338 rv
= putenv (c_str
);
1342 return SCM_UNSPECIFIED
;
1346 #ifdef HAVE_SETLOCALE
1347 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1348 (SCM category
, SCM locale
),
1349 "If @var{locale} is omitted, return the current value of the\n"
1350 "specified locale category as a system-dependent string.\n"
1351 "@var{category} should be specified using the values\n"
1352 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1354 "Otherwise the specified locale category is set to the string\n"
1355 "@var{locale} and the new value is returned as a\n"
1356 "system-dependent string. If @var{locale} is an empty string,\n"
1357 "the locale will be set using environment variables.")
1358 #define FUNC_NAME s_scm_setlocale
1363 scm_frame_begin (0);
1365 if (SCM_UNBNDP (locale
))
1371 clocale
= scm_to_locale_string (locale
);
1372 scm_frame_free (clocale
);
1375 rv
= setlocale (scm_i_to_lc_category (category
, 1), clocale
);
1378 /* POSIX and C99 don't say anything about setlocale setting errno, so
1379 force a sensible value here. glibc leaves ENOENT, which would be
1380 fine, but it's not a documented feature. */
1386 return scm_from_locale_string (rv
);
1389 #endif /* HAVE_SETLOCALE */
1392 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1393 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1394 "Creates a new special file, such as a file corresponding to a device.\n"
1395 "@var{path} specifies the name of the file. @var{type} should\n"
1396 "be one of the following symbols:\n"
1397 "regular, directory, symlink, block-special, char-special,\n"
1398 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1399 "@var{dev} (an integer) specifies which device the special file refers\n"
1400 "to. Its exact interpretation depends on the kind of special file\n"
1401 "being created.\n\n"
1404 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1406 "The return value is unspecified.")
1407 #define FUNC_NAME s_scm_mknod
1413 SCM_VALIDATE_STRING (1, path
);
1414 SCM_VALIDATE_SYMBOL (2, type
);
1416 p
= scm_i_symbol_chars (type
);
1417 if (strcmp (p
, "regular") == 0)
1419 else if (strcmp (p
, "directory") == 0)
1421 else if (strcmp (p
, "symlink") == 0)
1423 else if (strcmp (p
, "block-special") == 0)
1425 else if (strcmp (p
, "char-special") == 0)
1427 else if (strcmp (p
, "fifo") == 0)
1430 else if (strcmp (p
, "socket") == 0)
1434 SCM_OUT_OF_RANGE (2, type
);
1436 STRING_SYSCALL (path
, c_path
,
1437 val
= mknod (c_path
,
1438 ctype
| scm_to_int (perms
),
1442 return SCM_UNSPECIFIED
;
1445 #endif /* HAVE_MKNOD */
1448 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1450 "Increment the priority of the current process by @var{incr}. A higher\n"
1451 "priority value means that the process runs less often.\n"
1452 "The return value is unspecified.")
1453 #define FUNC_NAME s_scm_nice
1455 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1456 from "prio-NZERO", so an error must be detected from errno changed */
1458 nice (scm_to_int (incr
));
1461 return SCM_UNSPECIFIED
;
1464 #endif /* HAVE_NICE */
1467 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1469 "Flush the operating system disk buffers.\n"
1470 "The return value is unspecified.")
1471 #define FUNC_NAME s_scm_sync
1474 return SCM_UNSPECIFIED
;
1477 #endif /* HAVE_SYNC */
1480 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1481 to avoid another thread overwriting it. A test program running crypt
1482 continuously in two threads can be quickly seen tripping this problem.
1483 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1485 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1486 slower (about 5x) than plain crypt if you pass an uninitialized data
1487 block each time. Presumably there's some one-time setups. The best way
1488 to use crypt_r for parallel execution in multiple threads would probably
1489 be to maintain a little pool of initialized crypt_data structures, take
1490 one and use it, then return it to the pool. That pool could be garbage
1491 collected so it didn't add permanently to memory use if only a few crypt
1492 calls are made. But we expect crypt will be used rarely, and even more
1493 rarely will there be any desire for lots of parallel execution on
1494 multiple cpus. So for now we don't bother with anything fancy, just
1498 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1499 (SCM key
, SCM salt
),
1500 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1501 "crypt(3) library call.")
1502 #define FUNC_NAME s_scm_crypt
1505 char *c_key
, *c_salt
;
1507 scm_frame_begin (0);
1508 scm_frame_unwind_handler ((void(*)(void*)) scm_mutex_unlock
,
1510 SCM_F_WIND_EXPLICITLY
);
1511 scm_mutex_lock (&scm_i_misc_mutex
);
1513 c_key
= scm_to_locale_string (key
);
1514 scm_frame_free (c_key
);
1515 c_salt
= scm_to_locale_string (salt
);
1516 scm_frame_free (c_key
);
1518 ret
= scm_from_locale_string (crypt (c_key
, c_salt
));
1524 #endif /* HAVE_CRYPT */
1527 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1529 "Change the root directory to that specified in @var{path}.\n"
1530 "This directory will be used for path names beginning with\n"
1531 "@file{/}. The root directory is inherited by all children\n"
1532 "of the current process. Only the superuser may change the\n"
1534 #define FUNC_NAME s_scm_chroot
1538 WITH_STRING (path
, c_path
,
1539 rv
= chroot (c_path
));
1542 return SCM_UNSPECIFIED
;
1545 #endif /* HAVE_CHROOT */
1549 /* Wrapper function to supplying `getlogin()' under Windows. */
1550 static char * getlogin (void)
1552 static char user
[256];
1553 static unsigned long len
= 256;
1555 if (!GetUserName (user
, &len
))
1559 #endif /* __MINGW32__ */
1562 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1563 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1565 "Return a string containing the name of the user logged in on\n"
1566 "the controlling terminal of the process, or @code{#f} if this\n"
1567 "information cannot be obtained.")
1568 #define FUNC_NAME s_scm_getlogin
1575 return scm_from_locale_string (p
);
1578 #endif /* HAVE_GETLOGIN */
1581 SCM_DEFINE (scm_cuserid
, "cuserid", 0, 0, 0,
1583 "Return a string containing a user name associated with the\n"
1584 "effective user id of the process. Return @code{#f} if this\n"
1585 "information cannot be obtained.")
1586 #define FUNC_NAME s_scm_cuserid
1588 char buf
[L_cuserid
];
1594 return scm_from_locale_string (p
);
1597 #endif /* HAVE_CUSERID */
1599 #if HAVE_GETPRIORITY
1600 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1601 (SCM which
, SCM who
),
1602 "Return the scheduling priority of the process, process group\n"
1603 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1604 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1605 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1606 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1607 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1608 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1609 "denotes the current process, process group, or user. Return\n"
1610 "the highest priority (lowest numerical value) of any of the\n"
1611 "specified processes.")
1612 #define FUNC_NAME s_scm_getpriority
1614 int cwhich
, cwho
, ret
;
1616 cwhich
= scm_to_int (which
);
1617 cwho
= scm_to_int (who
);
1619 /* We have to clear errno and examine it later, because -1 is a
1620 legal return value for getpriority(). */
1622 ret
= getpriority (cwhich
, cwho
);
1625 return scm_from_int (ret
);
1628 #endif /* HAVE_GETPRIORITY */
1630 #if HAVE_SETPRIORITY
1631 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1632 (SCM which
, SCM who
, SCM prio
),
1633 "Set the scheduling priority of the process, process group\n"
1634 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1635 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1636 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1637 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1638 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1639 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1640 "denotes the current process, process group, or user.\n"
1641 "@var{prio} is a value in the range -20 and 20, the default\n"
1642 "priority is 0; lower priorities cause more favorable\n"
1643 "scheduling. Sets the priority of all of the specified\n"
1644 "processes. Only the super-user may lower priorities.\n"
1645 "The return value is not specified.")
1646 #define FUNC_NAME s_scm_setpriority
1648 int cwhich
, cwho
, cprio
;
1650 cwhich
= scm_to_int (which
);
1651 cwho
= scm_to_int (who
);
1652 cprio
= scm_to_int (prio
);
1654 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1656 return SCM_UNSPECIFIED
;
1659 #endif /* HAVE_SETPRIORITY */
1662 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
1664 "Display @var{prompt} to the standard error output and read\n"
1665 "a password from @file{/dev/tty}. If this file is not\n"
1666 "accessible, it reads from standard input. The password may be\n"
1667 "up to 127 characters in length. Additional characters and the\n"
1668 "terminating newline character are discarded. While reading\n"
1669 "the password, echoing and the generation of signals by special\n"
1670 "characters is disabled.")
1671 #define FUNC_NAME s_scm_getpass
1676 SCM_VALIDATE_STRING (1, prompt
);
1678 WITH_STRING (prompt
, c_prompt
,
1679 p
= getpass(c_prompt
));
1680 passwd
= scm_from_locale_string (p
);
1682 /* Clear out the password in the static buffer. */
1683 memset (p
, 0, strlen (p
));
1688 #endif /* HAVE_GETPASS */
1690 /* Wrapper function for flock() support under M$-Windows. */
1693 # include <sys/locking.h>
1696 /* Current MinGW package fails to define this. *sigh* */
1697 # define _LK_UNLCK 0
1704 static int flock (int fd
, int operation
)
1709 /* Disable invalid arguments. */
1710 if (((operation
& (LOCK_EX
| LOCK_SH
)) == (LOCK_EX
| LOCK_SH
)) ||
1711 ((operation
& (LOCK_EX
| LOCK_UN
)) == (LOCK_EX
| LOCK_UN
)) ||
1712 ((operation
& (LOCK_SH
| LOCK_UN
)) == (LOCK_SH
| LOCK_UN
)))
1718 /* Determine mode of operation and discard unsupported ones. */
1719 if (operation
== (LOCK_NB
| LOCK_EX
))
1720 operation
= _LK_NBLCK
;
1721 else if (operation
& LOCK_UN
)
1722 operation
= _LK_UNLCK
;
1723 else if (operation
== LOCK_EX
)
1724 operation
= _LK_LOCK
;
1731 /* Save current file pointer and seek to beginning. */
1732 if ((pos
= lseek (fd
, 0, SEEK_CUR
)) == -1 || (len
= filelength (fd
)) == -1)
1734 lseek (fd
, 0L, SEEK_SET
);
1736 /* Deadlock if necessary. */
1739 ret
= _locking (fd
, operation
, len
);
1741 while (ret
== -1 && errno
== EDEADLOCK
);
1743 /* Produce meaningful error message. */
1744 if (errno
== EACCES
&& operation
== _LK_NBLCK
)
1749 /* Return to saved file position pointer. */
1750 lseek (fd
, pos
, SEEK_SET
);
1754 #endif /* __MINGW32__ */
1756 #if HAVE_FLOCK || defined (__MINGW32__)
1757 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
1758 (SCM file
, SCM operation
),
1759 "Apply or remove an advisory lock on an open file.\n"
1760 "@var{operation} specifies the action to be done:\n"
1763 "Shared lock. More than one process may hold a shared lock\n"
1764 "for a given file at a given time.\n"
1766 "Exclusive lock. Only one process may hold an exclusive lock\n"
1767 "for a given file at a given time.\n"
1769 "Unlock the file.\n"
1771 "Don't block when locking. May be specified by bitwise OR'ing\n"
1772 "it to one of the other operations.\n"
1774 "The return value is not specified. @var{file} may be an open\n"
1775 "file descriptor or an open file descriptor port.")
1776 #define FUNC_NAME s_scm_flock
1780 if (scm_is_integer (file
))
1781 fdes
= scm_to_int (file
);
1784 SCM_VALIDATE_OPFPORT (2, file
);
1786 fdes
= SCM_FPORT_FDES (file
);
1788 if (flock (fdes
, scm_to_int (operation
)) == -1)
1790 return SCM_UNSPECIFIED
;
1793 #endif /* HAVE_FLOCK */
1795 #if HAVE_SETHOSTNAME
1796 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
1798 "Set the host name of the current processor to @var{name}. May\n"
1799 "only be used by the superuser. The return value is not\n"
1801 #define FUNC_NAME s_scm_sethostname
1805 WITH_STRING (name
, c_name
,
1806 rv
= sethostname (c_name
, strlen(c_name
)));
1809 return SCM_UNSPECIFIED
;
1812 #endif /* HAVE_SETHOSTNAME */
1815 #if HAVE_GETHOSTNAME
1816 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
1818 "Return the host name of the current processor.")
1819 #define FUNC_NAME s_scm_gethostname
1821 #ifdef MAXHOSTNAMELEN
1823 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
1824 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
1825 const int len
= MAXHOSTNAMELEN
+ 1;
1826 char *const p
= scm_malloc (len
);
1827 const int res
= gethostname (p
, len
);
1829 scm_frame_begin (0);
1830 scm_frame_unwind_handler (free
, p
, 0);
1834 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
1835 * large enough. SUSv2 specifies 255 maximum too, apparently. */
1840 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
1842 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
1843 * which may reflect a particular kernel configuration.
1844 * Must watch out for this existing but giving -1, as happens for instance
1845 * in gnu/linux glibc 2.3.2. */
1847 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
1854 p
= scm_malloc (len
);
1856 scm_frame_begin (0);
1857 scm_frame_unwind_handler (free
, p
, 0);
1859 res
= gethostname (p
, len
);
1860 while (res
== -1 && errno
== ENAMETOOLONG
)
1864 /* scm_realloc may throw an exception. */
1865 p
= scm_realloc (p
, len
);
1866 res
= gethostname (p
, len
);
1873 const int save_errno
= errno
;
1875 // No guile exceptions can occur before we have freed p's memory.
1884 /* scm_from_locale_string may throw an exception. */
1885 const SCM name
= scm_from_locale_string (p
);
1887 // No guile exceptions can occur before we have freed p's memory.
1895 #endif /* HAVE_GETHOSTNAME */
1901 scm_add_feature ("posix");
1903 scm_add_feature ("EIDs");
1906 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
1909 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
1912 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
1915 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
1918 /* access() symbols. */
1919 scm_c_define ("R_OK", scm_from_int (R_OK
));
1920 scm_c_define ("W_OK", scm_from_int (W_OK
));
1921 scm_c_define ("X_OK", scm_from_int (X_OK
));
1922 scm_c_define ("F_OK", scm_from_int (F_OK
));
1925 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
1928 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
1931 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
1934 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
1937 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
1940 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
1943 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
1946 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
1949 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
1952 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
1955 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
1957 #ifdef LC_MEASUREMENT
1958 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
1960 #ifdef LC_IDENTIFICATION
1961 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
1964 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
1968 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
1971 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
1974 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
1978 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
1981 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
1984 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
1987 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
1990 #include "libguile/cpp_sig_symbols.c"
1991 #include "libguile/posix.x"