1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004 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_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_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_VECTOR_REF (group_vec
, i
), ulong_gid
);
307 if (gid
!= ulong_gid
)
308 SCM_OUT_OF_RANGE (1, SCM_VECTOR_REF (group_vec
, i
));
311 size
= ngroups
* sizeof (GETGROUPS_T
);
312 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
313 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
314 groups
= scm_malloc (size
);
315 for(i
= 0; i
< ngroups
; i
++)
316 groups
[i
] = SCM_NUM2ULONG (1, SCM_VECTOR_REF (group_vec
, i
));
318 result
= setgroups (ngroups
, groups
);
319 save_errno
= errno
; /* don't let free() touch errno */
324 return SCM_UNSPECIFIED
;
330 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
332 "Look up an entry in the user database. @var{obj} can be an integer,\n"
333 "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
334 "or getpwent respectively.")
335 #define FUNC_NAME s_scm_getpwuid
337 struct passwd
*entry
;
339 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
340 if (SCM_UNBNDP (user
) || scm_is_false (user
))
342 SCM_SYSCALL (entry
= getpwent ());
348 else if (scm_is_integer (user
))
350 entry
= getpwuid (scm_to_int (user
));
354 WITH_STRING (user
, c_user
,
355 entry
= getpwnam (c_user
));
358 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
360 SCM_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
361 SCM_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
362 SCM_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
363 SCM_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
364 SCM_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
366 SCM_VECTOR_SET(result
, 5, scm_from_locale_string (""));
368 SCM_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
369 if (!entry
->pw_shell
)
370 SCM_VECTOR_SET(result
, 6, scm_from_locale_string (""));
372 SCM_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
376 #endif /* HAVE_GETPWENT */
380 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
382 "If called with a true argument, initialize or reset the password data\n"
383 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
384 "@code{endpwent} procedures are implemented on top of this.")
385 #define FUNC_NAME s_scm_setpwent
387 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
391 return SCM_UNSPECIFIED
;
398 /* Combines getgrgid and getgrnam. */
399 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
401 "Look up an entry in the group database. @var{obj} can be an integer,\n"
402 "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
403 "or getgrent respectively.")
404 #define FUNC_NAME s_scm_getgrgid
407 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
409 if (SCM_UNBNDP (name
) || scm_is_false (name
))
411 SCM_SYSCALL (entry
= getgrent ());
417 else if (scm_is_integer (name
))
418 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
420 STRING_SYSCALL (name
, c_name
,
421 entry
= getgrnam (c_name
));
425 SCM_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
426 SCM_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
427 SCM_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
428 SCM_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
435 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
437 "If called with a true argument, initialize or reset the group data\n"
438 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
439 "@code{endgrent} procedures are implemented on top of this.")
440 #define FUNC_NAME s_scm_setgrent
442 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
446 return SCM_UNSPECIFIED
;
449 #endif /* HAVE_GETGRENT */
452 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
454 "Sends a signal to the specified process or group of processes.\n\n"
455 "@var{pid} specifies the processes to which the signal is sent:\n\n"
457 "@item @var{pid} greater than 0\n"
458 "The process whose identifier is @var{pid}.\n"
459 "@item @var{pid} equal to 0\n"
460 "All processes in the current process group.\n"
461 "@item @var{pid} less than -1\n"
462 "The process group whose identifier is -@var{pid}\n"
463 "@item @var{pid} equal to -1\n"
464 "If the process is privileged, all processes except for some special\n"
465 "system processes. Otherwise, all processes with the current effective\n"
468 "@var{sig} should be specified using a variable corresponding to\n"
469 "the Unix symbolic name, e.g.,\n\n"
474 "Interrupt signal.\n"
476 #define FUNC_NAME s_scm_kill
478 /* Signal values are interned in scm_init_posix(). */
480 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
482 if (scm_to_int (pid
) == getpid ())
483 if (raise (scm_to_int (sig
)) != 0)
486 return SCM_UNSPECIFIED
;
491 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
492 (SCM pid
, SCM options
),
493 "This procedure collects status information from a child process which\n"
494 "has terminated or (optionally) stopped. Normally it will\n"
495 "suspend the calling process until this can be done. If more than one\n"
496 "child process is eligible then one will be chosen by the operating system.\n\n"
497 "The value of @var{pid} determines the behaviour:\n\n"
499 "@item @var{pid} greater than 0\n"
500 "Request status information from the specified child process.\n"
501 "@item @var{pid} equal to -1 or WAIT_ANY\n"
502 "Request status information for any child process.\n"
503 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
504 "Request status information for any child process in the current process\n"
506 "@item @var{pid} less than -1\n"
507 "Request status information for any child process whose process group ID\n"
510 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
511 "values of zero or more of the following variables:\n\n"
513 "Return immediately even if there are no child processes to be collected.\n"
515 "@defvar WUNTRACED\n"
516 "Report status information for stopped processes as well as terminated\n"
519 "The return value is a pair containing:\n\n"
522 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
523 "specified and no process was collected.\n"
525 "The integer status value.\n"
527 #define FUNC_NAME s_scm_waitpid
532 if (SCM_UNBNDP (options
))
536 /* Flags are interned in scm_init_posix. */
537 ioptions
= scm_to_int (options
);
539 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
542 return scm_cons (scm_from_int (i
), scm_from_int (status
));
545 #endif /* HAVE_WAITPID */
548 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
550 "Return the exit status value, as would be set if a process\n"
551 "ended normally through a call to @code{exit} or @code{_exit},\n"
552 "if any, otherwise @code{#f}.")
553 #define FUNC_NAME s_scm_status_exit_val
557 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
559 lstatus
= scm_to_int (status
);
560 if (WIFEXITED (lstatus
))
561 return (scm_from_int (WEXITSTATUS (lstatus
)));
567 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
569 "Return the signal number which terminated the process, if any,\n"
570 "otherwise @code{#f}.")
571 #define FUNC_NAME s_scm_status_term_sig
575 lstatus
= scm_to_int (status
);
576 if (WIFSIGNALED (lstatus
))
577 return scm_from_int (WTERMSIG (lstatus
));
583 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
585 "Return the signal number which stopped the process, if any,\n"
586 "otherwise @code{#f}.")
587 #define FUNC_NAME s_scm_status_stop_sig
591 lstatus
= scm_to_int (status
);
592 if (WIFSTOPPED (lstatus
))
593 return scm_from_int (WSTOPSIG (lstatus
));
598 #endif /* __MINGW32__ */
601 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
603 "Return an integer representing the process ID of the parent\n"
605 #define FUNC_NAME s_scm_getppid
607 return scm_from_int (getppid ());
610 #endif /* HAVE_GETPPID */
614 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
616 "Return an integer representing the current real user ID.")
617 #define FUNC_NAME s_scm_getuid
619 return scm_from_int (getuid ());
625 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
627 "Return an integer representing the current real group ID.")
628 #define FUNC_NAME s_scm_getgid
630 return scm_from_int (getgid ());
636 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
638 "Return an integer representing the current effective user ID.\n"
639 "If the system does not support effective IDs, then the real ID\n"
640 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
641 "system supports effective IDs.")
642 #define FUNC_NAME s_scm_geteuid
645 return scm_from_int (geteuid ());
647 return scm_from_int (getuid ());
653 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
655 "Return an integer representing the current effective group ID.\n"
656 "If the system does not support effective IDs, then the real ID\n"
657 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
658 "system supports effective IDs.")
659 #define FUNC_NAME s_scm_getegid
662 return scm_from_int (getegid ());
664 return scm_from_int (getgid ());
670 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
672 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
673 "the process has appropriate privileges.\n"
674 "The return value is unspecified.")
675 #define FUNC_NAME s_scm_setuid
677 if (setuid (scm_to_int (id
)) != 0)
679 return SCM_UNSPECIFIED
;
683 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
685 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
686 "the process has appropriate privileges.\n"
687 "The return value is unspecified.")
688 #define FUNC_NAME s_scm_setgid
690 if (setgid (scm_to_int (id
)) != 0)
692 return SCM_UNSPECIFIED
;
696 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
698 "Sets the effective user ID to the integer @var{id}, provided the process\n"
699 "has appropriate privileges. If effective IDs are not supported, the\n"
700 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
701 "system supports effective IDs.\n"
702 "The return value is unspecified.")
703 #define FUNC_NAME s_scm_seteuid
708 rv
= seteuid (scm_to_int (id
));
710 rv
= setuid (scm_to_int (id
));
714 return SCM_UNSPECIFIED
;
717 #endif /* __MINGW32__ */
721 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
723 "Sets the effective group ID to the integer @var{id}, provided the process\n"
724 "has appropriate privileges. If effective IDs are not supported, the\n"
725 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
726 "system supports effective IDs.\n"
727 "The return value is unspecified.")
728 #define FUNC_NAME s_scm_setegid
733 rv
= setegid (scm_to_int (id
));
735 rv
= setgid (scm_to_int (id
));
739 return SCM_UNSPECIFIED
;
747 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
749 "Return an integer representing the current process group ID.\n"
750 "This is the POSIX definition, not BSD.")
751 #define FUNC_NAME s_scm_getpgrp
754 fn
= (int (*) ()) getpgrp
;
755 return scm_from_int (fn (0));
758 #endif /* HAVE_GETPGRP */
762 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
764 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
765 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
767 "Fails on systems that do not support job control.\n"
768 "The return value is unspecified.")
769 #define FUNC_NAME s_scm_setpgid
771 /* FIXME(?): may be known as setpgrp. */
772 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
774 return SCM_UNSPECIFIED
;
777 #endif /* HAVE_SETPGID */
780 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
782 "Creates a new session. The current process becomes the session leader\n"
783 "and is put in a new process group. The process will be detached\n"
784 "from its controlling terminal if it has one.\n"
785 "The return value is an integer representing the new process group ID.")
786 #define FUNC_NAME s_scm_setsid
788 pid_t sid
= setsid ();
791 return SCM_UNSPECIFIED
;
794 #endif /* HAVE_SETSID */
797 /* ttyname returns its result in a single static buffer, hence
798 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
799 continuously calling ttyname will otherwise get an overwrite quite
802 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
803 there's probably little to be gained in either speed or parallelism. */
806 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
808 "Return a string with the name of the serial terminal device\n"
809 "underlying @var{port}.")
810 #define FUNC_NAME s_scm_ttyname
816 port
= SCM_COERCE_OUTPORT (port
);
817 SCM_VALIDATE_OPPORT (1, port
);
818 if (!SCM_FPORTP (port
))
820 fd
= SCM_FPORT_FDES (port
);
822 scm_mutex_lock (&scm_i_misc_mutex
);
823 SCM_SYSCALL (result
= ttyname (fd
));
825 ret
= scm_from_locale_string (result
);
826 scm_mutex_unlock (&scm_i_misc_mutex
);
836 #endif /* HAVE_TTYNAME */
839 /* For thread safety "buf" is used instead of NULL for the ctermid static
840 buffer. Actually it's unlikely the controlling terminal will change
841 during program execution, and indeed on glibc (2.3.2) it's always just
842 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
843 safety everywhere. */
845 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
847 "Return a string containing the file name of the controlling\n"
848 "terminal for the current process.")
849 #define FUNC_NAME s_scm_ctermid
852 char *result
= ctermid (buf
);
855 return scm_from_locale_string (result
);
858 #endif /* HAVE_CTERMID */
860 #ifdef HAVE_TCGETPGRP
861 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
863 "Return the process group ID of the foreground process group\n"
864 "associated with the terminal open on the file descriptor\n"
865 "underlying @var{port}.\n"
867 "If there is no foreground process group, the return value is a\n"
868 "number greater than 1 that does not match the process group ID\n"
869 "of any existing process group. This can happen if all of the\n"
870 "processes in the job that was formerly the foreground job have\n"
871 "terminated, and no other job has yet been moved into the\n"
873 #define FUNC_NAME s_scm_tcgetpgrp
878 port
= SCM_COERCE_OUTPORT (port
);
880 SCM_VALIDATE_OPFPORT (1, port
);
881 fd
= SCM_FPORT_FDES (port
);
882 if ((pgid
= tcgetpgrp (fd
)) == -1)
884 return scm_from_int (pgid
);
887 #endif /* HAVE_TCGETPGRP */
889 #ifdef HAVE_TCSETPGRP
890 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
891 (SCM port
, SCM pgid
),
892 "Set the foreground process group ID for the terminal used by the file\n"
893 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
894 "The calling process\n"
895 "must be a member of the same session as @var{pgid} and must have the same\n"
896 "controlling terminal. The return value is unspecified.")
897 #define FUNC_NAME s_scm_tcsetpgrp
901 port
= SCM_COERCE_OUTPORT (port
);
903 SCM_VALIDATE_OPFPORT (1, port
);
904 fd
= SCM_FPORT_FDES (port
);
905 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
907 return SCM_UNSPECIFIED
;
910 #endif /* HAVE_TCSETPGRP */
913 free_string_pointers (void *data
)
915 scm_i_free_string_pointers ((char **)data
);
918 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
919 (SCM filename
, SCM args
),
920 "Executes the file named by @var{path} as a new process image.\n"
921 "The remaining arguments are supplied to the process; from a C program\n"
922 "they are accessible as the @code{argv} argument to @code{main}.\n"
923 "Conventionally the first @var{arg} is the same as @var{path}.\n"
924 "All arguments must be strings.\n\n"
925 "If @var{arg} is missing, @var{path} is executed with a null\n"
926 "argument list, which may have system-dependent side-effects.\n\n"
927 "This procedure is currently implemented using the @code{execv} system\n"
928 "call, but we call it @code{execl} because of its Scheme calling interface.")
929 #define FUNC_NAME s_scm_execl
936 exec_file
= scm_to_locale_string (filename
);
937 scm_frame_free (exec_file
);
939 exec_argv
= scm_i_allocate_string_pointers (args
);
940 scm_frame_unwind_handler (free_string_pointers
, exec_argv
,
941 SCM_F_WIND_EXPLICITLY
);
943 execv (exec_file
, exec_argv
);
952 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
953 (SCM filename
, SCM args
),
954 "Similar to @code{execl}, however if\n"
955 "@var{filename} does not contain a slash\n"
956 "then the file to execute will be located by searching the\n"
957 "directories listed in the @code{PATH} environment variable.\n\n"
958 "This procedure is currently implemented using the @code{execvp} system\n"
959 "call, but we call it @code{execlp} because of its Scheme calling interface.")
960 #define FUNC_NAME s_scm_execlp
967 exec_file
= scm_to_locale_string (filename
);
968 scm_frame_free (exec_file
);
970 exec_argv
= scm_i_allocate_string_pointers (args
);
971 scm_frame_unwind_handler (free_string_pointers
, exec_argv
,
972 SCM_F_WIND_EXPLICITLY
);
974 execvp (exec_file
, exec_argv
);
984 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
985 list strings the way environ_list_to_c gives. */
987 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
988 (SCM filename
, SCM env
, SCM args
),
989 "Similar to @code{execl}, but the environment of the new process is\n"
990 "specified by @var{env}, which must be a list of strings as returned by the\n"
991 "@code{environ} procedure.\n\n"
992 "This procedure is currently implemented using the @code{execve} system\n"
993 "call, but we call it @code{execle} because of its Scheme calling interface.")
994 #define FUNC_NAME s_scm_execle
1000 scm_frame_begin (0);
1002 exec_file
= scm_to_locale_string (filename
);
1003 scm_frame_free (exec_file
);
1005 exec_argv
= scm_i_allocate_string_pointers (args
);
1006 scm_frame_unwind_handler (free_string_pointers
, exec_argv
,
1007 SCM_F_WIND_EXPLICITLY
);
1009 exec_env
= scm_i_allocate_string_pointers (env
);
1010 scm_frame_unwind_handler (free_string_pointers
, exec_env
,
1011 SCM_F_WIND_EXPLICITLY
);
1013 execve (exec_file
, exec_argv
, exec_env
);
1023 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1025 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1026 "In the child the return value is 0. In the parent the return value is\n"
1027 "the integer process ID of the child.\n\n"
1028 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1029 "with the scsh fork.")
1030 #define FUNC_NAME s_scm_fork
1036 return scm_from_int (pid
);
1039 #endif /* HAVE_FORK */
1042 # include "win32-uname.h"
1045 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1046 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1048 "Return an object with some information about the computer\n"
1049 "system the program is running on.")
1050 #define FUNC_NAME s_scm_uname
1053 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1054 if (uname (&buf
) < 0)
1056 SCM_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1057 SCM_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1058 SCM_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1059 SCM_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1060 SCM_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1063 SCM_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1068 #endif /* HAVE_UNAME */
1070 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1072 "If @var{env} is omitted, return the current environment (in the\n"
1073 "Unix sense) as a list of strings. Otherwise set the current\n"
1074 "environment, which is also the default environment for child\n"
1075 "processes, to the supplied list of strings. Each member of\n"
1076 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1077 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1078 "then the return value is unspecified.")
1079 #define FUNC_NAME s_scm_environ
1081 if (SCM_UNBNDP (env
))
1082 return scm_makfromstrs (-1, environ
);
1087 new_environ
= scm_i_allocate_string_pointers (env
);
1088 /* Free the old environment, except when called for the first
1092 static int first
= 1;
1094 scm_i_free_string_pointers (environ
);
1097 environ
= new_environ
;
1098 return SCM_UNSPECIFIED
;
1105 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1107 "Return a name in the file system that does not match any\n"
1108 "existing file. However there is no guarantee that another\n"
1109 "process will not create the file after @code{tmpnam} is called.\n"
1110 "Care should be taken if opening the file, e.g., use the\n"
1111 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1112 #define FUNC_NAME s_scm_tmpnam
1114 char name
[L_tmpnam
];
1117 SCM_SYSCALL (rv
= tmpnam (name
));
1119 /* not SCM_SYSERROR since errno probably not set. */
1120 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1121 return scm_from_locale_string (name
);
1127 #ifndef HAVE_MKSTEMP
1128 extern int mkstemp (char *);
1131 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1133 "Create a new unique file in the file system and returns a new\n"
1134 "buffered port open for reading and writing to the file.\n"
1135 "@var{tmpl} is a string specifying where the file should be\n"
1136 "created: it must end with @code{XXXXXX} and will be changed in\n"
1137 "place to return the name of the temporary file.")
1138 #define FUNC_NAME s_scm_mkstemp
1143 scm_frame_begin (0);
1145 c_tmpl
= scm_to_locale_string (tmpl
);
1146 scm_frame_free (c_tmpl
);
1148 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1152 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1153 SCM_INUM0
, scm_string_length (tmpl
),
1157 return scm_fdes_to_port (rv
, "w+", tmpl
);
1161 SCM_DEFINE (scm_utime
, "utime", 1, 2, 0,
1162 (SCM pathname
, SCM actime
, SCM modtime
),
1163 "@code{utime} sets the access and modification times for the\n"
1164 "file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1165 "not supplied, then the current time is used. @var{actime} and\n"
1166 "@var{modtime} must be integer time values as returned by the\n"
1167 "@code{current-time} procedure.\n"
1169 "(utime \"foo\" (- (current-time) 3600))\n"
1171 "will set the access time to one hour in the past and the\n"
1172 "modification time to the current time.")
1173 #define FUNC_NAME s_scm_utime
1176 struct utimbuf utm_tmp
;
1178 if (SCM_UNBNDP (actime
))
1179 SCM_SYSCALL (time (&utm_tmp
.actime
));
1181 utm_tmp
.actime
= SCM_NUM2ULONG (2, actime
);
1183 if (SCM_UNBNDP (modtime
))
1184 SCM_SYSCALL (time (&utm_tmp
.modtime
));
1186 utm_tmp
.modtime
= SCM_NUM2ULONG (3, modtime
);
1188 STRING_SYSCALL (pathname
, c_pathname
,
1189 rv
= utime (c_pathname
, &utm_tmp
));
1192 return SCM_UNSPECIFIED
;
1196 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1197 (SCM path
, SCM how
),
1198 "Test accessibility of a file under the real UID and GID of the\n"
1199 "calling process. The return is @code{#t} if @var{path} exists\n"
1200 "and the permissions requested by @var{how} are all allowed, or\n"
1201 "@code{#f} if not.\n"
1203 "@var{how} is an integer which is one of the following values,\n"
1204 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1207 "Test for read permission.\n"
1210 "Test for write permission.\n"
1213 "Test for execute permission.\n"
1216 "Test for existence of the file. This is implied by each of the\n"
1217 "other tests, so there's no need to combine it with them.\n"
1220 "It's important to note that @code{access?} does not simply\n"
1221 "indicate what will happen on attempting to read or write a\n"
1222 "file. In normal circumstances it does, but in a set-UID or\n"
1223 "set-GID program it doesn't because @code{access?} tests the\n"
1224 "real ID, whereas an open or execute attempt uses the effective\n"
1227 "A program which will never run set-UID/GID can ignore the\n"
1228 "difference between real and effective IDs, but for maximum\n"
1229 "generality, especially in library functions, it's best not to\n"
1230 "use @code{access?} to predict the result of an open or execute,\n"
1231 "instead simply attempt that and catch any exception.\n"
1233 "The main use for @code{access?} is to let a set-UID/GID program\n"
1234 "determine what the invoking user would have been allowed to do,\n"
1235 "without the greater (or perhaps lesser) privileges afforded by\n"
1236 "the effective ID. For more on this, see ``Testing File\n"
1237 "Access'' in The GNU C Library Reference Manual.")
1238 #define FUNC_NAME s_scm_access
1242 WITH_STRING (path
, c_path
,
1243 rv
= access (c_path
, scm_to_int (how
)));
1244 return scm_from_bool (!rv
);
1248 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1250 "Return an integer representing the current process ID.")
1251 #define FUNC_NAME s_scm_getpid
1253 return scm_from_ulong (getpid ());
1257 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1259 "Modifies the environment of the current process, which is\n"
1260 "also the default environment inherited by child processes.\n\n"
1261 "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1262 "directly into the environment, replacing any existing environment string\n"
1264 "name matching @code{NAME}. If @var{string} does not contain an equal\n"
1265 "sign, then any existing string with name matching @var{string} will\n"
1267 "The return value is unspecified.")
1268 #define FUNC_NAME s_scm_putenv
1271 char *c_str
= scm_to_locale_string (str
);
1273 size_t len
= strlen (c_str
);
1276 if (strchr (c_str
, '=') == NULL
)
1278 #ifdef HAVE_UNSETENV
1279 /* No '=' in argument means we should remove the variable from
1280 the environment. Not all putenvs understand this (for instance
1281 FreeBSD 4.8 doesn't). To be safe, we do it explicitely using
1286 /* On e.g. Win32 hosts putenv() called with 'name=' removes the
1287 environment variable 'name'. */
1289 char *ptr
= scm_malloc (len
+ 2);
1290 strcpy (ptr
, c_str
);
1291 strcpy (ptr
+len
, "=");
1293 e
= errno
; free (ptr
); free (c_str
); errno
= e
;
1296 #endif /* !HAVE_UNSETENV */
1301 /* If str is "FOO=", ie. attempting to set an empty string, then
1302 we need to see if it's been successful. On MINGW, "FOO="
1303 means remove FOO from the environment. As a workaround, we
1304 set "FOO= ", ie. a space, and then modify the string returned
1305 by getenv. It's not enough just to modify the string we set,
1306 because MINGW putenv copies it. */
1308 if (c_str
[len
-1] == '=')
1310 char *ptr
= scm_malloc (len
+2);
1311 strcpy (ptr
, c_str
);
1312 strcpy (ptr
+len
, " ");
1321 /* truncate to just the name */
1322 c_str
[len
-1] = '\0';
1323 ptr
= getenv (c_str
);
1326 return SCM_UNSPECIFIED
;
1328 #endif /* __MINGW32__ */
1330 /* Leave c_str in the environment. */
1332 rv
= putenv (c_str
);
1336 return SCM_UNSPECIFIED
;
1340 #ifdef HAVE_SETLOCALE
1341 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1342 (SCM category
, SCM locale
),
1343 "If @var{locale} is omitted, return the current value of the\n"
1344 "specified locale category as a system-dependent string.\n"
1345 "@var{category} should be specified using the values\n"
1346 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1348 "Otherwise the specified locale category is set to the string\n"
1349 "@var{locale} and the new value is returned as a\n"
1350 "system-dependent string. If @var{locale} is an empty string,\n"
1351 "the locale will be set using environment variables.")
1352 #define FUNC_NAME s_scm_setlocale
1357 scm_frame_begin (0);
1359 if (SCM_UNBNDP (locale
))
1365 clocale
= scm_to_locale_string (locale
);
1366 scm_frame_free (clocale
);
1369 rv
= setlocale (scm_i_to_lc_category (category
, 1), clocale
);
1374 return scm_from_locale_string (rv
);
1377 #endif /* HAVE_SETLOCALE */
1380 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1381 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1382 "Creates a new special file, such as a file corresponding to a device.\n"
1383 "@var{path} specifies the name of the file. @var{type} should\n"
1384 "be one of the following symbols:\n"
1385 "regular, directory, symlink, block-special, char-special,\n"
1386 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1387 "@var{dev} (an integer) specifies which device the special file refers\n"
1388 "to. Its exact interpretation depends on the kind of special file\n"
1389 "being created.\n\n"
1392 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1394 "The return value is unspecified.")
1395 #define FUNC_NAME s_scm_mknod
1401 SCM_VALIDATE_STRING (1, path
);
1402 SCM_VALIDATE_SYMBOL (2, type
);
1404 p
= scm_i_symbol_chars (type
);
1405 if (strcmp (p
, "regular") == 0)
1407 else if (strcmp (p
, "directory") == 0)
1409 else if (strcmp (p
, "symlink") == 0)
1411 else if (strcmp (p
, "block-special") == 0)
1413 else if (strcmp (p
, "char-special") == 0)
1415 else if (strcmp (p
, "fifo") == 0)
1418 else if (strcmp (p
, "socket") == 0)
1422 SCM_OUT_OF_RANGE (2, type
);
1424 STRING_SYSCALL (path
, c_path
,
1425 val
= mknod (c_path
,
1426 ctype
| scm_to_int (perms
),
1430 return SCM_UNSPECIFIED
;
1433 #endif /* HAVE_MKNOD */
1436 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1438 "Increment the priority of the current process by @var{incr}. A higher\n"
1439 "priority value means that the process runs less often.\n"
1440 "The return value is unspecified.")
1441 #define FUNC_NAME s_scm_nice
1443 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1444 from "prio-NZERO", so an error must be detected from errno changed */
1446 nice (scm_to_int (incr
));
1449 return SCM_UNSPECIFIED
;
1452 #endif /* HAVE_NICE */
1455 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1457 "Flush the operating system disk buffers.\n"
1458 "The return value is unspecified.")
1459 #define FUNC_NAME s_scm_sync
1462 return SCM_UNSPECIFIED
;
1465 #endif /* HAVE_SYNC */
1468 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1469 to avoid another thread overwriting it. A test program running crypt
1470 continuously in two threads can be quickly seen tripping this problem.
1471 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1473 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1474 slower (about 5x) than plain crypt if you pass an uninitialized data
1475 block each time. Presumably there's some one-time setups. The best way
1476 to use crypt_r for parallel execution in multiple threads would probably
1477 be to maintain a little pool of initialized crypt_data structures, take
1478 one and use it, then return it to the pool. That pool could be garbage
1479 collected so it didn't add permanently to memory use if only a few crypt
1480 calls are made. But we expect crypt will be used rarely, and even more
1481 rarely will there be any desire for lots of parallel execution on
1482 multiple cpus. So for now we don't bother with anything fancy, just
1486 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1487 (SCM key
, SCM salt
),
1488 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1489 "crypt(3) library call.")
1490 #define FUNC_NAME s_scm_crypt
1493 char *c_key
, *c_salt
;
1495 scm_frame_begin (0);
1496 scm_frame_unwind_handler ((void(*)(void*)) scm_mutex_unlock
,
1498 SCM_F_WIND_EXPLICITLY
);
1499 scm_mutex_lock (&scm_i_misc_mutex
);
1501 c_key
= scm_to_locale_string (key
);
1502 scm_frame_free (c_key
);
1503 c_salt
= scm_to_locale_string (salt
);
1504 scm_frame_free (c_key
);
1506 ret
= scm_from_locale_string (crypt (c_key
, c_salt
));
1512 #endif /* HAVE_CRYPT */
1515 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1517 "Change the root directory to that specified in @var{path}.\n"
1518 "This directory will be used for path names beginning with\n"
1519 "@file{/}. The root directory is inherited by all children\n"
1520 "of the current process. Only the superuser may change the\n"
1522 #define FUNC_NAME s_scm_chroot
1526 WITH_STRING (path
, c_path
,
1527 rv
= chroot (c_path
));
1530 return SCM_UNSPECIFIED
;
1533 #endif /* HAVE_CHROOT */
1537 /* Wrapper function to supplying `getlogin()' under Windows. */
1538 static char * getlogin (void)
1540 static char user
[256];
1541 static unsigned long len
= 256;
1543 if (!GetUserName (user
, &len
))
1547 #endif /* __MINGW32__ */
1550 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1551 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1553 "Return a string containing the name of the user logged in on\n"
1554 "the controlling terminal of the process, or @code{#f} if this\n"
1555 "information cannot be obtained.")
1556 #define FUNC_NAME s_scm_getlogin
1563 return scm_from_locale_string (p
);
1566 #endif /* HAVE_GETLOGIN */
1569 SCM_DEFINE (scm_cuserid
, "cuserid", 0, 0, 0,
1571 "Return a string containing a user name associated with the\n"
1572 "effective user id of the process. Return @code{#f} if this\n"
1573 "information cannot be obtained.")
1574 #define FUNC_NAME s_scm_cuserid
1576 char buf
[L_cuserid
];
1582 return scm_from_locale_string (p
);
1585 #endif /* HAVE_CUSERID */
1587 #if HAVE_GETPRIORITY
1588 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1589 (SCM which
, SCM who
),
1590 "Return the scheduling priority of the process, process group\n"
1591 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1592 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1593 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1594 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1595 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1596 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1597 "denotes the current process, process group, or user. Return\n"
1598 "the highest priority (lowest numerical value) of any of the\n"
1599 "specified processes.")
1600 #define FUNC_NAME s_scm_getpriority
1602 int cwhich
, cwho
, ret
;
1604 cwhich
= scm_to_int (which
);
1605 cwho
= scm_to_int (who
);
1607 /* We have to clear errno and examine it later, because -1 is a
1608 legal return value for getpriority(). */
1610 ret
= getpriority (cwhich
, cwho
);
1613 return scm_from_int (ret
);
1616 #endif /* HAVE_GETPRIORITY */
1618 #if HAVE_SETPRIORITY
1619 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1620 (SCM which
, SCM who
, SCM prio
),
1621 "Set the scheduling priority of the process, process group\n"
1622 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1623 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1624 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1625 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1626 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1627 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1628 "denotes the current process, process group, or user.\n"
1629 "@var{prio} is a value in the range -20 and 20, the default\n"
1630 "priority is 0; lower priorities cause more favorable\n"
1631 "scheduling. Sets the priority of all of the specified\n"
1632 "processes. Only the super-user may lower priorities.\n"
1633 "The return value is not specified.")
1634 #define FUNC_NAME s_scm_setpriority
1636 int cwhich
, cwho
, cprio
;
1638 cwhich
= scm_to_int (which
);
1639 cwho
= scm_to_int (who
);
1640 cprio
= scm_to_int (prio
);
1642 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1644 return SCM_UNSPECIFIED
;
1647 #endif /* HAVE_SETPRIORITY */
1650 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
1652 "Display @var{prompt} to the standard error output and read\n"
1653 "a password from @file{/dev/tty}. If this file is not\n"
1654 "accessible, it reads from standard input. The password may be\n"
1655 "up to 127 characters in length. Additional characters and the\n"
1656 "terminating newline character are discarded. While reading\n"
1657 "the password, echoing and the generation of signals by special\n"
1658 "characters is disabled.")
1659 #define FUNC_NAME s_scm_getpass
1664 SCM_VALIDATE_STRING (1, prompt
);
1666 WITH_STRING (prompt
, c_prompt
,
1667 p
= getpass(c_prompt
));
1668 passwd
= scm_from_locale_string (p
);
1670 /* Clear out the password in the static buffer. */
1671 memset (p
, 0, strlen (p
));
1676 #endif /* HAVE_GETPASS */
1678 /* Wrapper function for flock() support under M$-Windows. */
1681 # include <sys/locking.h>
1684 /* Current MinGW package fails to define this. *sigh* */
1685 # define _LK_UNLCK 0
1692 static int flock (int fd
, int operation
)
1697 /* Disable invalid arguments. */
1698 if (((operation
& (LOCK_EX
| LOCK_SH
)) == (LOCK_EX
| LOCK_SH
)) ||
1699 ((operation
& (LOCK_EX
| LOCK_UN
)) == (LOCK_EX
| LOCK_UN
)) ||
1700 ((operation
& (LOCK_SH
| LOCK_UN
)) == (LOCK_SH
| LOCK_UN
)))
1706 /* Determine mode of operation and discard unsupported ones. */
1707 if (operation
== (LOCK_NB
| LOCK_EX
))
1708 operation
= _LK_NBLCK
;
1709 else if (operation
& LOCK_UN
)
1710 operation
= _LK_UNLCK
;
1711 else if (operation
== LOCK_EX
)
1712 operation
= _LK_LOCK
;
1719 /* Save current file pointer and seek to beginning. */
1720 if ((pos
= lseek (fd
, 0, SEEK_CUR
)) == -1 || (len
= filelength (fd
)) == -1)
1722 lseek (fd
, 0L, SEEK_SET
);
1724 /* Deadlock if necessary. */
1727 ret
= _locking (fd
, operation
, len
);
1729 while (ret
== -1 && errno
== EDEADLOCK
);
1731 /* Produce meaningful error message. */
1732 if (errno
== EACCES
&& operation
== _LK_NBLCK
)
1737 /* Return to saved file position pointer. */
1738 lseek (fd
, pos
, SEEK_SET
);
1742 #endif /* __MINGW32__ */
1744 #if HAVE_FLOCK || defined (__MINGW32__)
1745 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
1746 (SCM file
, SCM operation
),
1747 "Apply or remove an advisory lock on an open file.\n"
1748 "@var{operation} specifies the action to be done:\n"
1751 "Shared lock. More than one process may hold a shared lock\n"
1752 "for a given file at a given time.\n"
1754 "Exclusive lock. Only one process may hold an exclusive lock\n"
1755 "for a given file at a given time.\n"
1757 "Unlock the file.\n"
1759 "Don't block when locking. May be specified by bitwise OR'ing\n"
1760 "it to one of the other operations.\n"
1762 "The return value is not specified. @var{file} may be an open\n"
1763 "file descriptor or an open file descriptor port.")
1764 #define FUNC_NAME s_scm_flock
1768 if (scm_is_integer (file
))
1769 fdes
= scm_to_int (file
);
1772 SCM_VALIDATE_OPFPORT (2, file
);
1774 fdes
= SCM_FPORT_FDES (file
);
1776 if (flock (fdes
, scm_to_int (operation
)) == -1)
1778 return SCM_UNSPECIFIED
;
1781 #endif /* HAVE_FLOCK */
1783 #if HAVE_SETHOSTNAME
1784 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
1786 "Set the host name of the current processor to @var{name}. May\n"
1787 "only be used by the superuser. The return value is not\n"
1789 #define FUNC_NAME s_scm_sethostname
1793 WITH_STRING (name
, c_name
,
1794 rv
= sethostname (c_name
, strlen(c_name
)));
1797 return SCM_UNSPECIFIED
;
1800 #endif /* HAVE_SETHOSTNAME */
1803 #if HAVE_GETHOSTNAME
1804 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
1806 "Return the host name of the current processor.")
1807 #define FUNC_NAME s_scm_gethostname
1809 #ifdef MAXHOSTNAMELEN
1811 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
1812 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
1813 const int len
= MAXHOSTNAMELEN
+ 1;
1814 char *const p
= scm_malloc (len
);
1815 const int res
= gethostname (p
, len
);
1817 scm_frame_begin (0);
1818 scm_frame_unwind_handler (free
, p
, 0);
1822 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
1823 * large enough. SUSv2 specifies 255 maximum too, apparently. */
1828 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
1830 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
1831 * which may reflect a particular kernel configuration.
1832 * Must watch out for this existing but giving -1, as happens for instance
1833 * in gnu/linux glibc 2.3.2. */
1835 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
1842 p
= scm_malloc (len
);
1844 scm_frame_begin (0);
1845 scm_frame_unwind_handler (free
, p
, 0);
1847 res
= gethostname (p
, len
);
1848 while (res
== -1 && errno
== ENAMETOOLONG
)
1852 /* scm_realloc may throw an exception. */
1853 p
= scm_realloc (p
, len
);
1854 res
= gethostname (p
, len
);
1861 const int save_errno
= errno
;
1863 // No guile exceptions can occur before we have freed p's memory.
1872 /* scm_from_locale_string may throw an exception. */
1873 const SCM name
= scm_from_locale_string (p
);
1875 // No guile exceptions can occur before we have freed p's memory.
1883 #endif /* HAVE_GETHOSTNAME */
1889 scm_add_feature ("posix");
1891 scm_add_feature ("EIDs");
1894 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
1897 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
1900 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
1903 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
1906 /* access() symbols. */
1907 scm_c_define ("R_OK", scm_from_int (R_OK
));
1908 scm_c_define ("W_OK", scm_from_int (W_OK
));
1909 scm_c_define ("X_OK", scm_from_int (X_OK
));
1910 scm_c_define ("F_OK", scm_from_int (F_OK
));
1913 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
1916 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
1919 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
1922 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
1925 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
1928 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
1931 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
1934 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
1937 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
1940 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
1943 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
1945 #ifdef LC_MEASUREMENT
1946 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
1948 #ifdef LC_IDENTIFICATION
1949 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
1952 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
1956 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
1959 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
1962 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
1966 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
1969 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
1972 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
1975 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
1978 #include "libguile/cpp_sig_symbols.c"
1979 #include "libguile/posix.x"