1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
3 * This library is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU Lesser General Public
5 * License as published by the Free Software Foundation; either
6 * version 2.1 of the License, or (at your option) any later version.
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * Lesser General Public License for more details.
13 * You should have received a copy of the GNU Lesser General Public
14 * License along with this library; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 /* Make GNU/Linux libc declare everything it has. */
30 #include "libguile/_scm.h"
31 #include "libguile/dynwind.h"
32 #include "libguile/fports.h"
33 #include "libguile/scmsigs.h"
34 #include "libguile/feature.h"
35 #include "libguile/strings.h"
36 #include "libguile/srfi-13.h"
37 #include "libguile/srfi-14.h"
38 #include "libguile/vectors.h"
39 #include "libguile/lang.h"
41 #include "libguile/validate.h"
42 #include "libguile/posix.h"
43 #include "libguile/i18n.h"
44 #include "libguile/threads.h"
50 #ifdef TIME_WITH_SYS_TIME
51 # include <sys/time.h>
55 # include <sys/time.h>
65 extern char *ttyname();
69 #ifdef LIBC_H_WITH_UNISTD_H
73 #include <sys/types.h>
83 #ifdef HAVE_WINSOCK2_H
88 /* Some defines for Windows here. */
90 # define pipe(fd) _pipe (fd, 256, O_BINARY)
91 #endif /* __MINGW32__ */
94 # include <sys/wait.h>
97 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
100 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
105 extern char ** environ
;
110 #ifdef HAVE_SYS_UTSNAME_H
111 #include <sys/utsname.h>
114 #ifdef HAVE_SETLOCALE
123 #include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
126 #ifdef HAVE_SYS_PARAM_H
127 #include <sys/param.h> /* for MAXHOSTNAMELEN */
130 #if HAVE_SYS_RESOURCE_H
131 # include <sys/resource.h>
135 # include <sys/file.h>
138 #if HAVE_CRT_EXTERNS_H
139 #include <crt_externs.h> /* for Darwin _NSGetEnviron */
142 /* Some Unix systems don't define these. CPP hair is dangerous, but
143 this seems safe enough... */
160 /* On NextStep, <utime.h> doesn't define struct utime, unless we
161 #define _POSIX_SOURCE before #including it. I think this is less
162 of a kludge than defining struct utimbuf ourselves. */
163 #ifdef UTIMBUF_NEEDS_POSIX
164 #define _POSIX_SOURCE
167 #ifdef HAVE_SYS_UTIME_H
168 #include <sys/utime.h>
175 /* Please don't add any more #includes or #defines here. The hack
176 above means that _POSIX_SOURCE may be #defined, which will
177 encourage header files to do strange things.
179 FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
181 FIXME: Probably should do all the includes first, then all the fallback
182 declarations and defines, in case things are not in the header we
188 /* On Apple Darwin in a shared library there's no "environ" to access
189 directly, instead the address of that variable must be obtained with
191 #if HAVE__NSGETENVIRON && defined (PIC)
192 #define environ (*_NSGetEnviron())
197 /* Two often used patterns
200 #define WITH_STRING(str,cstr,code) \
202 char *cstr = scm_to_locale_string (str); \
207 #define STRING_SYSCALL(str,cstr,code) \
210 char *cstr = scm_to_locale_string (str); \
211 SCM_SYSCALL (code); \
212 eno = errno; free (cstr); errno = eno; \
217 SCM_SYMBOL (sym_read_pipe
, "read pipe");
218 SCM_SYMBOL (sym_write_pipe
, "write pipe");
220 SCM_DEFINE (scm_pipe
, "pipe", 0, 0, 0,
222 "Return a newly created pipe: a pair of ports which are linked\n"
223 "together on the local machine. The @emph{car} is the input\n"
224 "port and the @emph{cdr} is the output port. Data written (and\n"
225 "flushed) to the output port can be read from the input port.\n"
226 "Pipes are commonly used for communication with a newly forked\n"
227 "child process. The need to flush the output port can be\n"
228 "avoided by making it unbuffered using @code{setvbuf}.\n"
230 "Writes occur atomically provided the size of the data in bytes\n"
231 "is not greater than the value of @code{PIPE_BUF}. Note that\n"
232 "the output port is likely to block if too much data (typically\n"
233 "equal to @code{PIPE_BUF}) has been written but not yet read\n"
234 "from the input port.")
235 #define FUNC_NAME s_scm_pipe
244 p_rd
= scm_fdes_to_port (fd
[0], "r", sym_read_pipe
);
245 p_wt
= scm_fdes_to_port (fd
[1], "w", sym_write_pipe
);
246 return scm_cons (p_rd
, p_wt
);
251 #ifdef HAVE_GETGROUPS
252 SCM_DEFINE (scm_getgroups
, "getgroups", 0, 0, 0,
254 "Return a vector of integers representing the current\n"
255 "supplementary group IDs.")
256 #define FUNC_NAME s_scm_getgroups
263 ngroups
= getgroups (0, NULL
);
267 size
= ngroups
* sizeof (GETGROUPS_T
);
268 groups
= scm_malloc (size
);
269 getgroups (ngroups
, groups
);
271 result
= scm_c_make_vector (ngroups
, SCM_BOOL_F
);
272 while (--ngroups
>= 0)
273 SCM_SIMPLE_VECTOR_SET (result
, ngroups
, scm_from_ulong (groups
[ngroups
]));
281 #ifdef HAVE_SETGROUPS
282 SCM_DEFINE (scm_setgroups
, "setgroups", 1, 0, 0,
284 "Set the current set of supplementary group IDs to the integers\n"
285 "in the given vector @var{vec}. The return value is\n"
288 "Generally only the superuser can set the process group IDs.")
289 #define FUNC_NAME s_scm_setgroups
298 SCM_VALIDATE_VECTOR (SCM_ARG1
, group_vec
);
300 ngroups
= SCM_SIMPLE_VECTOR_LENGTH (group_vec
);
302 /* validate before allocating, so we don't have to worry about leaks */
303 for (i
= 0; i
< ngroups
; i
++)
305 unsigned long ulong_gid
;
307 SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
),
310 if (gid
!= ulong_gid
)
311 SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
314 size
= ngroups
* sizeof (GETGROUPS_T
);
315 if (size
/ sizeof (GETGROUPS_T
) != ngroups
)
316 SCM_OUT_OF_RANGE (SCM_ARG1
, scm_from_int (ngroups
));
317 groups
= scm_malloc (size
);
318 for(i
= 0; i
< ngroups
; i
++)
319 groups
[i
] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec
, i
));
321 result
= setgroups (ngroups
, groups
);
322 save_errno
= errno
; /* don't let free() touch errno */
327 return SCM_UNSPECIFIED
;
333 SCM_DEFINE (scm_getpwuid
, "getpw", 0, 1, 0,
335 "Look up an entry in the user database. @var{obj} can be an integer,\n"
336 "a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
337 "or getpwent respectively.")
338 #define FUNC_NAME s_scm_getpwuid
340 struct passwd
*entry
;
342 SCM result
= scm_c_make_vector (7, SCM_UNSPECIFIED
);
343 if (SCM_UNBNDP (user
) || scm_is_false (user
))
345 SCM_SYSCALL (entry
= getpwent ());
351 else if (scm_is_integer (user
))
353 entry
= getpwuid (scm_to_int (user
));
357 WITH_STRING (user
, c_user
,
358 entry
= getpwnam (c_user
));
361 SCM_MISC_ERROR ("entry not found", SCM_EOL
);
363 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->pw_name
));
364 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->pw_passwd
));
365 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->pw_uid
));
366 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_ulong (entry
->pw_gid
));
367 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (entry
->pw_gecos
));
369 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (""));
371 SCM_SIMPLE_VECTOR_SET(result
, 5, scm_from_locale_string (entry
->pw_dir
));
372 if (!entry
->pw_shell
)
373 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (""));
375 SCM_SIMPLE_VECTOR_SET(result
, 6, scm_from_locale_string (entry
->pw_shell
));
379 #endif /* HAVE_GETPWENT */
383 SCM_DEFINE (scm_setpwent
, "setpw", 0, 1, 0,
385 "If called with a true argument, initialize or reset the password data\n"
386 "stream. Otherwise, close the stream. The @code{setpwent} and\n"
387 "@code{endpwent} procedures are implemented on top of this.")
388 #define FUNC_NAME s_scm_setpwent
390 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
394 return SCM_UNSPECIFIED
;
401 /* Combines getgrgid and getgrnam. */
402 SCM_DEFINE (scm_getgrgid
, "getgr", 0, 1, 0,
404 "Look up an entry in the group database. @var{obj} can be an integer,\n"
405 "a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
406 "or getgrent respectively.")
407 #define FUNC_NAME s_scm_getgrgid
410 SCM result
= scm_c_make_vector (4, SCM_UNSPECIFIED
);
412 if (SCM_UNBNDP (name
) || scm_is_false (name
))
414 SCM_SYSCALL (entry
= getgrent ());
420 else if (scm_is_integer (name
))
421 SCM_SYSCALL (entry
= getgrgid (scm_to_int (name
)));
423 STRING_SYSCALL (name
, c_name
,
424 entry
= getgrnam (c_name
));
428 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (entry
->gr_name
));
429 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (entry
->gr_passwd
));
430 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_ulong (entry
->gr_gid
));
431 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_makfromstrs (-1, entry
->gr_mem
));
438 SCM_DEFINE (scm_setgrent
, "setgr", 0, 1, 0,
440 "If called with a true argument, initialize or reset the group data\n"
441 "stream. Otherwise, close the stream. The @code{setgrent} and\n"
442 "@code{endgrent} procedures are implemented on top of this.")
443 #define FUNC_NAME s_scm_setgrent
445 if (SCM_UNBNDP (arg
) || scm_is_false (arg
))
449 return SCM_UNSPECIFIED
;
452 #endif /* HAVE_GETGRENT */
455 SCM_DEFINE (scm_kill
, "kill", 2, 0, 0,
457 "Sends a signal to the specified process or group of processes.\n\n"
458 "@var{pid} specifies the processes to which the signal is sent:\n\n"
460 "@item @var{pid} greater than 0\n"
461 "The process whose identifier is @var{pid}.\n"
462 "@item @var{pid} equal to 0\n"
463 "All processes in the current process group.\n"
464 "@item @var{pid} less than -1\n"
465 "The process group whose identifier is -@var{pid}\n"
466 "@item @var{pid} equal to -1\n"
467 "If the process is privileged, all processes except for some special\n"
468 "system processes. Otherwise, all processes with the current effective\n"
471 "@var{sig} should be specified using a variable corresponding to\n"
472 "the Unix symbolic name, e.g.,\n\n"
477 "Interrupt signal.\n"
479 #define FUNC_NAME s_scm_kill
481 /* Signal values are interned in scm_init_posix(). */
483 if (kill (scm_to_int (pid
), scm_to_int (sig
)) != 0)
485 if (scm_to_int (pid
) == getpid ())
486 if (raise (scm_to_int (sig
)) != 0)
489 return SCM_UNSPECIFIED
;
494 SCM_DEFINE (scm_waitpid
, "waitpid", 1, 1, 0,
495 (SCM pid
, SCM options
),
496 "This procedure collects status information from a child process which\n"
497 "has terminated or (optionally) stopped. Normally it will\n"
498 "suspend the calling process until this can be done. If more than one\n"
499 "child process is eligible then one will be chosen by the operating system.\n\n"
500 "The value of @var{pid} determines the behaviour:\n\n"
502 "@item @var{pid} greater than 0\n"
503 "Request status information from the specified child process.\n"
504 "@item @var{pid} equal to -1 or WAIT_ANY\n"
505 "Request status information for any child process.\n"
506 "@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
507 "Request status information for any child process in the current process\n"
509 "@item @var{pid} less than -1\n"
510 "Request status information for any child process whose process group ID\n"
513 "The @var{options} argument, if supplied, should be the bitwise OR of the\n"
514 "values of zero or more of the following variables:\n\n"
516 "Return immediately even if there are no child processes to be collected.\n"
518 "@defvar WUNTRACED\n"
519 "Report status information for stopped processes as well as terminated\n"
522 "The return value is a pair containing:\n\n"
525 "The process ID of the child process, or 0 if @code{WNOHANG} was\n"
526 "specified and no process was collected.\n"
528 "The integer status value.\n"
530 #define FUNC_NAME s_scm_waitpid
535 if (SCM_UNBNDP (options
))
539 /* Flags are interned in scm_init_posix. */
540 ioptions
= scm_to_int (options
);
542 SCM_SYSCALL (i
= waitpid (scm_to_int (pid
), &status
, ioptions
));
545 return scm_cons (scm_from_int (i
), scm_from_int (status
));
548 #endif /* HAVE_WAITPID */
551 SCM_DEFINE (scm_status_exit_val
, "status:exit-val", 1, 0, 0,
553 "Return the exit status value, as would be set if a process\n"
554 "ended normally through a call to @code{exit} or @code{_exit},\n"
555 "if any, otherwise @code{#f}.")
556 #define FUNC_NAME s_scm_status_exit_val
560 /* On Ultrix, the WIF... macros assume their argument is an lvalue;
562 lstatus
= scm_to_int (status
);
563 if (WIFEXITED (lstatus
))
564 return (scm_from_int (WEXITSTATUS (lstatus
)));
570 SCM_DEFINE (scm_status_term_sig
, "status:term-sig", 1, 0, 0,
572 "Return the signal number which terminated the process, if any,\n"
573 "otherwise @code{#f}.")
574 #define FUNC_NAME s_scm_status_term_sig
578 lstatus
= scm_to_int (status
);
579 if (WIFSIGNALED (lstatus
))
580 return scm_from_int (WTERMSIG (lstatus
));
586 SCM_DEFINE (scm_status_stop_sig
, "status:stop-sig", 1, 0, 0,
588 "Return the signal number which stopped the process, if any,\n"
589 "otherwise @code{#f}.")
590 #define FUNC_NAME s_scm_status_stop_sig
594 lstatus
= scm_to_int (status
);
595 if (WIFSTOPPED (lstatus
))
596 return scm_from_int (WSTOPSIG (lstatus
));
601 #endif /* __MINGW32__ */
604 SCM_DEFINE (scm_getppid
, "getppid", 0, 0, 0,
606 "Return an integer representing the process ID of the parent\n"
608 #define FUNC_NAME s_scm_getppid
610 return scm_from_int (getppid ());
613 #endif /* HAVE_GETPPID */
617 SCM_DEFINE (scm_getuid
, "getuid", 0, 0, 0,
619 "Return an integer representing the current real user ID.")
620 #define FUNC_NAME s_scm_getuid
622 return scm_from_int (getuid ());
628 SCM_DEFINE (scm_getgid
, "getgid", 0, 0, 0,
630 "Return an integer representing the current real group ID.")
631 #define FUNC_NAME s_scm_getgid
633 return scm_from_int (getgid ());
639 SCM_DEFINE (scm_geteuid
, "geteuid", 0, 0, 0,
641 "Return an integer representing the current effective user ID.\n"
642 "If the system does not support effective IDs, then the real ID\n"
643 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
644 "system supports effective IDs.")
645 #define FUNC_NAME s_scm_geteuid
648 return scm_from_int (geteuid ());
650 return scm_from_int (getuid ());
656 SCM_DEFINE (scm_getegid
, "getegid", 0, 0, 0,
658 "Return an integer representing the current effective group ID.\n"
659 "If the system does not support effective IDs, then the real ID\n"
660 "is returned. @code{(provided? 'EIDs)} reports whether the\n"
661 "system supports effective IDs.")
662 #define FUNC_NAME s_scm_getegid
665 return scm_from_int (getegid ());
667 return scm_from_int (getgid ());
673 SCM_DEFINE (scm_setuid
, "setuid", 1, 0, 0,
675 "Sets both the real and effective user IDs to the integer @var{id}, provided\n"
676 "the process has appropriate privileges.\n"
677 "The return value is unspecified.")
678 #define FUNC_NAME s_scm_setuid
680 if (setuid (scm_to_int (id
)) != 0)
682 return SCM_UNSPECIFIED
;
686 SCM_DEFINE (scm_setgid
, "setgid", 1, 0, 0,
688 "Sets both the real and effective group IDs to the integer @var{id}, provided\n"
689 "the process has appropriate privileges.\n"
690 "The return value is unspecified.")
691 #define FUNC_NAME s_scm_setgid
693 if (setgid (scm_to_int (id
)) != 0)
695 return SCM_UNSPECIFIED
;
699 SCM_DEFINE (scm_seteuid
, "seteuid", 1, 0, 0,
701 "Sets the effective user ID to the integer @var{id}, provided the process\n"
702 "has appropriate privileges. If effective IDs are not supported, the\n"
703 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
704 "system supports effective IDs.\n"
705 "The return value is unspecified.")
706 #define FUNC_NAME s_scm_seteuid
711 rv
= seteuid (scm_to_int (id
));
713 rv
= setuid (scm_to_int (id
));
717 return SCM_UNSPECIFIED
;
720 #endif /* __MINGW32__ */
724 SCM_DEFINE (scm_setegid
, "setegid", 1, 0, 0,
726 "Sets the effective group ID to the integer @var{id}, provided the process\n"
727 "has appropriate privileges. If effective IDs are not supported, the\n"
728 "real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
729 "system supports effective IDs.\n"
730 "The return value is unspecified.")
731 #define FUNC_NAME s_scm_setegid
736 rv
= setegid (scm_to_int (id
));
738 rv
= setgid (scm_to_int (id
));
742 return SCM_UNSPECIFIED
;
750 SCM_DEFINE (scm_getpgrp
, "getpgrp", 0, 0, 0,
752 "Return an integer representing the current process group ID.\n"
753 "This is the POSIX definition, not BSD.")
754 #define FUNC_NAME s_scm_getpgrp
757 fn
= (int (*) ()) getpgrp
;
758 return scm_from_int (fn (0));
761 #endif /* HAVE_GETPGRP */
765 SCM_DEFINE (scm_setpgid
, "setpgid", 2, 0, 0,
767 "Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
768 "@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
770 "Fails on systems that do not support job control.\n"
771 "The return value is unspecified.")
772 #define FUNC_NAME s_scm_setpgid
774 /* FIXME(?): may be known as setpgrp. */
775 if (setpgid (scm_to_int (pid
), scm_to_int (pgid
)) != 0)
777 return SCM_UNSPECIFIED
;
780 #endif /* HAVE_SETPGID */
783 SCM_DEFINE (scm_setsid
, "setsid", 0, 0, 0,
785 "Creates a new session. The current process becomes the session leader\n"
786 "and is put in a new process group. The process will be detached\n"
787 "from its controlling terminal if it has one.\n"
788 "The return value is an integer representing the new process group ID.")
789 #define FUNC_NAME s_scm_setsid
791 pid_t sid
= setsid ();
794 return SCM_UNSPECIFIED
;
797 #endif /* HAVE_SETSID */
800 /* ttyname returns its result in a single static buffer, hence
801 scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
802 continuously calling ttyname will otherwise get an overwrite quite
805 ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
806 there's probably little to be gained in either speed or parallelism. */
809 SCM_DEFINE (scm_ttyname
, "ttyname", 1, 0, 0,
811 "Return a string with the name of the serial terminal device\n"
812 "underlying @var{port}.")
813 #define FUNC_NAME s_scm_ttyname
819 port
= SCM_COERCE_OUTPORT (port
);
820 SCM_VALIDATE_OPPORT (1, port
);
821 if (!SCM_FPORTP (port
))
823 fd
= SCM_FPORT_FDES (port
);
825 scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex
);
826 SCM_SYSCALL (result
= ttyname (fd
));
828 ret
= scm_from_locale_string (result
);
829 scm_i_pthread_mutex_unlock (&scm_i_misc_mutex
);
839 #endif /* HAVE_TTYNAME */
842 /* For thread safety "buf" is used instead of NULL for the ctermid static
843 buffer. Actually it's unlikely the controlling terminal will change
844 during program execution, and indeed on glibc (2.3.2) it's always just
845 "/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
846 safety everywhere. */
848 SCM_DEFINE (scm_ctermid
, "ctermid", 0, 0, 0,
850 "Return a string containing the file name of the controlling\n"
851 "terminal for the current process.")
852 #define FUNC_NAME s_scm_ctermid
855 char *result
= ctermid (buf
);
858 return scm_from_locale_string (result
);
861 #endif /* HAVE_CTERMID */
863 #ifdef HAVE_TCGETPGRP
864 SCM_DEFINE (scm_tcgetpgrp
, "tcgetpgrp", 1, 0, 0,
866 "Return the process group ID of the foreground process group\n"
867 "associated with the terminal open on the file descriptor\n"
868 "underlying @var{port}.\n"
870 "If there is no foreground process group, the return value is a\n"
871 "number greater than 1 that does not match the process group ID\n"
872 "of any existing process group. This can happen if all of the\n"
873 "processes in the job that was formerly the foreground job have\n"
874 "terminated, and no other job has yet been moved into the\n"
876 #define FUNC_NAME s_scm_tcgetpgrp
881 port
= SCM_COERCE_OUTPORT (port
);
883 SCM_VALIDATE_OPFPORT (1, port
);
884 fd
= SCM_FPORT_FDES (port
);
885 if ((pgid
= tcgetpgrp (fd
)) == -1)
887 return scm_from_int (pgid
);
890 #endif /* HAVE_TCGETPGRP */
892 #ifdef HAVE_TCSETPGRP
893 SCM_DEFINE (scm_tcsetpgrp
, "tcsetpgrp", 2, 0, 0,
894 (SCM port
, SCM pgid
),
895 "Set the foreground process group ID for the terminal used by the file\n"
896 "descriptor underlying @var{port} to the integer @var{pgid}.\n"
897 "The calling process\n"
898 "must be a member of the same session as @var{pgid} and must have the same\n"
899 "controlling terminal. The return value is unspecified.")
900 #define FUNC_NAME s_scm_tcsetpgrp
904 port
= SCM_COERCE_OUTPORT (port
);
906 SCM_VALIDATE_OPFPORT (1, port
);
907 fd
= SCM_FPORT_FDES (port
);
908 if (tcsetpgrp (fd
, scm_to_int (pgid
)) == -1)
910 return SCM_UNSPECIFIED
;
913 #endif /* HAVE_TCSETPGRP */
916 free_string_pointers (void *data
)
918 scm_i_free_string_pointers ((char **)data
);
921 SCM_DEFINE (scm_execl
, "execl", 1, 0, 1,
922 (SCM filename
, SCM args
),
923 "Executes the file named by @var{path} as a new process image.\n"
924 "The remaining arguments are supplied to the process; from a C program\n"
925 "they are accessible as the @code{argv} argument to @code{main}.\n"
926 "Conventionally the first @var{arg} is the same as @var{path}.\n"
927 "All arguments must be strings.\n\n"
928 "If @var{arg} is missing, @var{path} is executed with a null\n"
929 "argument list, which may have system-dependent side-effects.\n\n"
930 "This procedure is currently implemented using the @code{execv} system\n"
931 "call, but we call it @code{execl} because of its Scheme calling interface.")
932 #define FUNC_NAME s_scm_execl
937 scm_dynwind_begin (0);
939 exec_file
= scm_to_locale_string (filename
);
940 scm_dynwind_free (exec_file
);
942 exec_argv
= scm_i_allocate_string_pointers (args
);
943 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
944 SCM_F_WIND_EXPLICITLY
);
946 execv (exec_file
, exec_argv
);
955 SCM_DEFINE (scm_execlp
, "execlp", 1, 0, 1,
956 (SCM filename
, SCM args
),
957 "Similar to @code{execl}, however if\n"
958 "@var{filename} does not contain a slash\n"
959 "then the file to execute will be located by searching the\n"
960 "directories listed in the @code{PATH} environment variable.\n\n"
961 "This procedure is currently implemented using the @code{execvp} system\n"
962 "call, but we call it @code{execlp} because of its Scheme calling interface.")
963 #define FUNC_NAME s_scm_execlp
968 scm_dynwind_begin (0);
970 exec_file
= scm_to_locale_string (filename
);
971 scm_dynwind_free (exec_file
);
973 exec_argv
= scm_i_allocate_string_pointers (args
);
974 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
975 SCM_F_WIND_EXPLICITLY
);
977 execvp (exec_file
, exec_argv
);
987 /* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
988 list strings the way environ_list_to_c gives. */
990 SCM_DEFINE (scm_execle
, "execle", 2, 0, 1,
991 (SCM filename
, SCM env
, SCM args
),
992 "Similar to @code{execl}, but the environment of the new process is\n"
993 "specified by @var{env}, which must be a list of strings as returned by the\n"
994 "@code{environ} procedure.\n\n"
995 "This procedure is currently implemented using the @code{execve} system\n"
996 "call, but we call it @code{execle} because of its Scheme calling interface.")
997 #define FUNC_NAME s_scm_execle
1003 scm_dynwind_begin (0);
1005 exec_file
= scm_to_locale_string (filename
);
1006 scm_dynwind_free (exec_file
);
1008 exec_argv
= scm_i_allocate_string_pointers (args
);
1009 scm_dynwind_unwind_handler (free_string_pointers
, exec_argv
,
1010 SCM_F_WIND_EXPLICITLY
);
1012 exec_env
= scm_i_allocate_string_pointers (env
);
1013 scm_dynwind_unwind_handler (free_string_pointers
, exec_env
,
1014 SCM_F_WIND_EXPLICITLY
);
1016 execve (exec_file
, exec_argv
, exec_env
);
1026 SCM_DEFINE (scm_fork
, "primitive-fork", 0, 0, 0,
1028 "Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1029 "In the child the return value is 0. In the parent the return value is\n"
1030 "the integer process ID of the child.\n\n"
1031 "This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1032 "with the scsh fork.")
1033 #define FUNC_NAME s_scm_fork
1039 return scm_from_int (pid
);
1042 #endif /* HAVE_FORK */
1045 # include "win32-uname.h"
1048 #if defined (HAVE_UNAME) || defined (__MINGW32__)
1049 SCM_DEFINE (scm_uname
, "uname", 0, 0, 0,
1051 "Return an object with some information about the computer\n"
1052 "system the program is running on.")
1053 #define FUNC_NAME s_scm_uname
1056 SCM result
= scm_c_make_vector (5, SCM_UNSPECIFIED
);
1057 if (uname (&buf
) < 0)
1059 SCM_SIMPLE_VECTOR_SET(result
, 0, scm_from_locale_string (buf
.sysname
));
1060 SCM_SIMPLE_VECTOR_SET(result
, 1, scm_from_locale_string (buf
.nodename
));
1061 SCM_SIMPLE_VECTOR_SET(result
, 2, scm_from_locale_string (buf
.release
));
1062 SCM_SIMPLE_VECTOR_SET(result
, 3, scm_from_locale_string (buf
.version
));
1063 SCM_SIMPLE_VECTOR_SET(result
, 4, scm_from_locale_string (buf
.machine
));
1066 SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1071 #endif /* HAVE_UNAME */
1073 SCM_DEFINE (scm_environ
, "environ", 0, 1, 0,
1075 "If @var{env} is omitted, return the current environment (in the\n"
1076 "Unix sense) as a list of strings. Otherwise set the current\n"
1077 "environment, which is also the default environment for child\n"
1078 "processes, to the supplied list of strings. Each member of\n"
1079 "@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1080 "@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1081 "then the return value is unspecified.")
1082 #define FUNC_NAME s_scm_environ
1084 if (SCM_UNBNDP (env
))
1085 return scm_makfromstrs (-1, environ
);
1090 new_environ
= scm_i_allocate_string_pointers (env
);
1091 /* Free the old environment, except when called for the first
1095 static int first
= 1;
1097 scm_i_free_string_pointers (environ
);
1100 environ
= new_environ
;
1101 return SCM_UNSPECIFIED
;
1108 SCM_DEFINE (scm_tmpnam
, "tmpnam", 0, 0, 0,
1110 "Return a name in the file system that does not match any\n"
1111 "existing file. However there is no guarantee that another\n"
1112 "process will not create the file after @code{tmpnam} is called.\n"
1113 "Care should be taken if opening the file, e.g., use the\n"
1114 "@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1115 #define FUNC_NAME s_scm_tmpnam
1117 char name
[L_tmpnam
];
1120 SCM_SYSCALL (rv
= tmpnam (name
));
1122 /* not SCM_SYSERROR since errno probably not set. */
1123 SCM_MISC_ERROR ("tmpnam failed", SCM_EOL
);
1124 return scm_from_locale_string (name
);
1130 #ifndef HAVE_MKSTEMP
1131 extern int mkstemp (char *);
1134 SCM_DEFINE (scm_mkstemp
, "mkstemp!", 1, 0, 0,
1136 "Create a new unique file in the file system and return a new\n"
1137 "buffered port open for reading and writing to the file.\n"
1139 "@var{tmpl} is a string specifying where the file should be\n"
1140 "created: it must end with @samp{XXXXXX} and those @samp{X}s\n"
1141 "will be changed in the string to return the name of the file.\n"
1142 "(@code{port-filename} on the port also gives the name.)\n"
1144 "POSIX doesn't specify the permissions mode of the file, on GNU\n"
1145 "and most systems it's @code{#o600}. An application can use\n"
1146 "@code{chmod} to relax that if desired. For example\n"
1147 "@code{#o666} less @code{umask}, which is usual for ordinary\n"
1151 "(let ((port (mkstemp! (string-copy \"/tmp/myfile-XXXXXX\"))))\n"
1152 " (chmod port (logand #o666 (lognot (umask))))\n"
1155 #define FUNC_NAME s_scm_mkstemp
1160 scm_dynwind_begin (0);
1162 c_tmpl
= scm_to_locale_string (tmpl
);
1163 scm_dynwind_free (c_tmpl
);
1165 SCM_SYSCALL (rv
= mkstemp (c_tmpl
));
1169 scm_substring_move_x (scm_from_locale_string (c_tmpl
),
1170 SCM_INUM0
, scm_string_length (tmpl
),
1174 return scm_fdes_to_port (rv
, "w+", tmpl
);
1178 SCM_DEFINE (scm_utime
, "utime", 1, 2, 0,
1179 (SCM pathname
, SCM actime
, SCM modtime
),
1180 "@code{utime} sets the access and modification times for the\n"
1181 "file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1182 "not supplied, then the current time is used. @var{actime} and\n"
1183 "@var{modtime} must be integer time values as returned by the\n"
1184 "@code{current-time} procedure.\n"
1186 "(utime \"foo\" (- (current-time) 3600))\n"
1188 "will set the access time to one hour in the past and the\n"
1189 "modification time to the current time.")
1190 #define FUNC_NAME s_scm_utime
1193 struct utimbuf utm_tmp
;
1195 if (SCM_UNBNDP (actime
))
1196 SCM_SYSCALL (time (&utm_tmp
.actime
));
1198 utm_tmp
.actime
= SCM_NUM2ULONG (2, actime
);
1200 if (SCM_UNBNDP (modtime
))
1201 SCM_SYSCALL (time (&utm_tmp
.modtime
));
1203 utm_tmp
.modtime
= SCM_NUM2ULONG (3, modtime
);
1205 STRING_SYSCALL (pathname
, c_pathname
,
1206 rv
= utime (c_pathname
, &utm_tmp
));
1209 return SCM_UNSPECIFIED
;
1213 SCM_DEFINE (scm_access
, "access?", 2, 0, 0,
1214 (SCM path
, SCM how
),
1215 "Test accessibility of a file under the real UID and GID of the\n"
1216 "calling process. The return is @code{#t} if @var{path} exists\n"
1217 "and the permissions requested by @var{how} are all allowed, or\n"
1218 "@code{#f} if not.\n"
1220 "@var{how} is an integer which is one of the following values,\n"
1221 "or a bitwise-OR (@code{logior}) of multiple values.\n"
1224 "Test for read permission.\n"
1227 "Test for write permission.\n"
1230 "Test for execute permission.\n"
1233 "Test for existence of the file. This is implied by each of the\n"
1234 "other tests, so there's no need to combine it with them.\n"
1237 "It's important to note that @code{access?} does not simply\n"
1238 "indicate what will happen on attempting to read or write a\n"
1239 "file. In normal circumstances it does, but in a set-UID or\n"
1240 "set-GID program it doesn't because @code{access?} tests the\n"
1241 "real ID, whereas an open or execute attempt uses the effective\n"
1244 "A program which will never run set-UID/GID can ignore the\n"
1245 "difference between real and effective IDs, but for maximum\n"
1246 "generality, especially in library functions, it's best not to\n"
1247 "use @code{access?} to predict the result of an open or execute,\n"
1248 "instead simply attempt that and catch any exception.\n"
1250 "The main use for @code{access?} is to let a set-UID/GID program\n"
1251 "determine what the invoking user would have been allowed to do,\n"
1252 "without the greater (or perhaps lesser) privileges afforded by\n"
1253 "the effective ID. For more on this, see ``Testing File\n"
1254 "Access'' in The GNU C Library Reference Manual.")
1255 #define FUNC_NAME s_scm_access
1259 WITH_STRING (path
, c_path
,
1260 rv
= access (c_path
, scm_to_int (how
)));
1261 return scm_from_bool (!rv
);
1265 SCM_DEFINE (scm_getpid
, "getpid", 0, 0, 0,
1267 "Return an integer representing the current process ID.")
1268 #define FUNC_NAME s_scm_getpid
1270 return scm_from_ulong (getpid ());
1274 SCM_DEFINE (scm_putenv
, "putenv", 1, 0, 0,
1276 "Modifies the environment of the current process, which is\n"
1277 "also the default environment inherited by child processes.\n\n"
1278 "If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1279 "directly into the environment, replacing any existing environment string\n"
1281 "name matching @code{NAME}. If @var{string} does not contain an equal\n"
1282 "sign, then any existing string with name matching @var{string} will\n"
1284 "The return value is unspecified.")
1285 #define FUNC_NAME s_scm_putenv
1288 char *c_str
= scm_to_locale_string (str
);
1290 size_t len
= strlen (c_str
);
1293 if (strchr (c_str
, '=') == NULL
)
1295 #ifdef HAVE_UNSETENV
1296 /* No '=' in argument means we should remove the variable from
1297 the environment. Not all putenvs understand this (for instance
1298 FreeBSD 4.8 doesn't). To be safe, we do it explicitely using
1303 /* On e.g. Win32 hosts putenv() called with 'name=' removes the
1304 environment variable 'name'. */
1306 char *ptr
= scm_malloc (len
+ 2);
1307 strcpy (ptr
, c_str
);
1308 strcpy (ptr
+len
, "=");
1310 e
= errno
; free (ptr
); free (c_str
); errno
= e
;
1313 #endif /* !HAVE_UNSETENV */
1318 /* If str is "FOO=", ie. attempting to set an empty string, then
1319 we need to see if it's been successful. On MINGW, "FOO="
1320 means remove FOO from the environment. As a workaround, we
1321 set "FOO= ", ie. a space, and then modify the string returned
1322 by getenv. It's not enough just to modify the string we set,
1323 because MINGW putenv copies it. */
1325 if (c_str
[len
-1] == '=')
1327 char *ptr
= scm_malloc (len
+2);
1328 strcpy (ptr
, c_str
);
1329 strcpy (ptr
+len
, " ");
1338 /* truncate to just the name */
1339 c_str
[len
-1] = '\0';
1340 ptr
= getenv (c_str
);
1343 return SCM_UNSPECIFIED
;
1345 #endif /* __MINGW32__ */
1347 /* Leave c_str in the environment. */
1349 rv
= putenv (c_str
);
1353 return SCM_UNSPECIFIED
;
1357 #ifdef HAVE_SETLOCALE
1358 SCM_DEFINE (scm_setlocale
, "setlocale", 1, 1, 0,
1359 (SCM category
, SCM locale
),
1360 "If @var{locale} is omitted, return the current value of the\n"
1361 "specified locale category as a system-dependent string.\n"
1362 "@var{category} should be specified using the values\n"
1363 "@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1365 "Otherwise the specified locale category is set to the string\n"
1366 "@var{locale} and the new value is returned as a\n"
1367 "system-dependent string. If @var{locale} is an empty string,\n"
1368 "the locale will be set using environment variables.")
1369 #define FUNC_NAME s_scm_setlocale
1374 scm_dynwind_begin (0);
1376 if (SCM_UNBNDP (locale
))
1382 clocale
= scm_to_locale_string (locale
);
1383 scm_dynwind_free (clocale
);
1386 rv
= setlocale (scm_i_to_lc_category (category
, 1), clocale
);
1389 /* POSIX and C99 don't say anything about setlocale setting errno, so
1390 force a sensible value here. glibc leaves ENOENT, which would be
1391 fine, but it's not a documented feature. */
1396 /* Recompute the standard SRFI-14 character sets in a locale-dependent
1397 (actually charset-dependent) way. */
1398 scm_srfi_14_compute_char_sets ();
1401 return scm_from_locale_string (rv
);
1404 #endif /* HAVE_SETLOCALE */
1407 SCM_DEFINE (scm_mknod
, "mknod", 4, 0, 0,
1408 (SCM path
, SCM type
, SCM perms
, SCM dev
),
1409 "Creates a new special file, such as a file corresponding to a device.\n"
1410 "@var{path} specifies the name of the file. @var{type} should\n"
1411 "be one of the following symbols:\n"
1412 "regular, directory, symlink, block-special, char-special,\n"
1413 "fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1414 "@var{dev} (an integer) specifies which device the special file refers\n"
1415 "to. Its exact interpretation depends on the kind of special file\n"
1416 "being created.\n\n"
1419 "(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1421 "The return value is unspecified.")
1422 #define FUNC_NAME s_scm_mknod
1428 SCM_VALIDATE_STRING (1, path
);
1429 SCM_VALIDATE_SYMBOL (2, type
);
1431 p
= scm_i_symbol_chars (type
);
1432 if (strcmp (p
, "regular") == 0)
1434 else if (strcmp (p
, "directory") == 0)
1437 /* systems without symlinks probably don't have S_IFLNK defined */
1438 else if (strcmp (p
, "symlink") == 0)
1441 else if (strcmp (p
, "block-special") == 0)
1443 else if (strcmp (p
, "char-special") == 0)
1445 else if (strcmp (p
, "fifo") == 0)
1448 else if (strcmp (p
, "socket") == 0)
1452 SCM_OUT_OF_RANGE (2, type
);
1454 STRING_SYSCALL (path
, c_path
,
1455 val
= mknod (c_path
,
1456 ctype
| scm_to_int (perms
),
1460 return SCM_UNSPECIFIED
;
1463 #endif /* HAVE_MKNOD */
1466 SCM_DEFINE (scm_nice
, "nice", 1, 0, 0,
1468 "Increment the priority of the current process by @var{incr}. A higher\n"
1469 "priority value means that the process runs less often.\n"
1470 "The return value is unspecified.")
1471 #define FUNC_NAME s_scm_nice
1473 /* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1474 from "prio-NZERO", so an error must be detected from errno changed */
1476 nice (scm_to_int (incr
));
1479 return SCM_UNSPECIFIED
;
1482 #endif /* HAVE_NICE */
1485 SCM_DEFINE (scm_sync
, "sync", 0, 0, 0,
1487 "Flush the operating system disk buffers.\n"
1488 "The return value is unspecified.")
1489 #define FUNC_NAME s_scm_sync
1492 return SCM_UNSPECIFIED
;
1495 #endif /* HAVE_SYNC */
1498 /* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1499 to avoid another thread overwriting it. A test program running crypt
1500 continuously in two threads can be quickly seen tripping this problem.
1501 crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1503 glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1504 slower (about 5x) than plain crypt if you pass an uninitialized data
1505 block each time. Presumably there's some one-time setups. The best way
1506 to use crypt_r for parallel execution in multiple threads would probably
1507 be to maintain a little pool of initialized crypt_data structures, take
1508 one and use it, then return it to the pool. That pool could be garbage
1509 collected so it didn't add permanently to memory use if only a few crypt
1510 calls are made. But we expect crypt will be used rarely, and even more
1511 rarely will there be any desire for lots of parallel execution on
1512 multiple cpus. So for now we don't bother with anything fancy, just
1516 SCM_DEFINE (scm_crypt
, "crypt", 2, 0, 0,
1517 (SCM key
, SCM salt
),
1518 "Encrypt @var{key} using @var{salt} as the salt value to the\n"
1519 "crypt(3) library call.")
1520 #define FUNC_NAME s_scm_crypt
1523 char *c_key
, *c_salt
;
1525 scm_dynwind_begin (0);
1526 scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex
);
1528 c_key
= scm_to_locale_string (key
);
1529 scm_dynwind_free (c_key
);
1530 c_salt
= scm_to_locale_string (salt
);
1531 scm_dynwind_free (c_salt
);
1533 ret
= scm_from_locale_string (crypt (c_key
, c_salt
));
1539 #endif /* HAVE_CRYPT */
1542 SCM_DEFINE (scm_chroot
, "chroot", 1, 0, 0,
1544 "Change the root directory to that specified in @var{path}.\n"
1545 "This directory will be used for path names beginning with\n"
1546 "@file{/}. The root directory is inherited by all children\n"
1547 "of the current process. Only the superuser may change the\n"
1549 #define FUNC_NAME s_scm_chroot
1553 WITH_STRING (path
, c_path
,
1554 rv
= chroot (c_path
));
1557 return SCM_UNSPECIFIED
;
1560 #endif /* HAVE_CHROOT */
1564 /* Wrapper function to supplying `getlogin()' under Windows. */
1565 static char * getlogin (void)
1567 static char user
[256];
1568 static unsigned long len
= 256;
1570 if (!GetUserName (user
, &len
))
1574 #endif /* __MINGW32__ */
1577 #if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1578 SCM_DEFINE (scm_getlogin
, "getlogin", 0, 0, 0,
1580 "Return a string containing the name of the user logged in on\n"
1581 "the controlling terminal of the process, or @code{#f} if this\n"
1582 "information cannot be obtained.")
1583 #define FUNC_NAME s_scm_getlogin
1590 return scm_from_locale_string (p
);
1593 #endif /* HAVE_GETLOGIN */
1596 SCM_DEFINE (scm_cuserid
, "cuserid", 0, 0, 0,
1598 "Return a string containing a user name associated with the\n"
1599 "effective user id of the process. Return @code{#f} if this\n"
1600 "information cannot be obtained.")
1601 #define FUNC_NAME s_scm_cuserid
1603 char buf
[L_cuserid
];
1609 return scm_from_locale_string (p
);
1612 #endif /* HAVE_CUSERID */
1614 #if HAVE_GETPRIORITY
1615 SCM_DEFINE (scm_getpriority
, "getpriority", 2, 0, 0,
1616 (SCM which
, SCM who
),
1617 "Return the scheduling priority of the process, process group\n"
1618 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1619 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1620 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1621 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1622 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1623 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1624 "denotes the current process, process group, or user. Return\n"
1625 "the highest priority (lowest numerical value) of any of the\n"
1626 "specified processes.")
1627 #define FUNC_NAME s_scm_getpriority
1629 int cwhich
, cwho
, ret
;
1631 cwhich
= scm_to_int (which
);
1632 cwho
= scm_to_int (who
);
1634 /* We have to clear errno and examine it later, because -1 is a
1635 legal return value for getpriority(). */
1637 ret
= getpriority (cwhich
, cwho
);
1640 return scm_from_int (ret
);
1643 #endif /* HAVE_GETPRIORITY */
1645 #if HAVE_SETPRIORITY
1646 SCM_DEFINE (scm_setpriority
, "setpriority", 3, 0, 0,
1647 (SCM which
, SCM who
, SCM prio
),
1648 "Set the scheduling priority of the process, process group\n"
1649 "or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1650 "is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1651 "or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1652 "@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1653 "process group identifier for @code{PRIO_PGRP}, and a user\n"
1654 "identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1655 "denotes the current process, process group, or user.\n"
1656 "@var{prio} is a value in the range -20 and 20, the default\n"
1657 "priority is 0; lower priorities cause more favorable\n"
1658 "scheduling. Sets the priority of all of the specified\n"
1659 "processes. Only the super-user may lower priorities.\n"
1660 "The return value is not specified.")
1661 #define FUNC_NAME s_scm_setpriority
1663 int cwhich
, cwho
, cprio
;
1665 cwhich
= scm_to_int (which
);
1666 cwho
= scm_to_int (who
);
1667 cprio
= scm_to_int (prio
);
1669 if (setpriority (cwhich
, cwho
, cprio
) == -1)
1671 return SCM_UNSPECIFIED
;
1674 #endif /* HAVE_SETPRIORITY */
1677 SCM_DEFINE (scm_getpass
, "getpass", 1, 0, 0,
1679 "Display @var{prompt} to the standard error output and read\n"
1680 "a password from @file{/dev/tty}. If this file is not\n"
1681 "accessible, it reads from standard input. The password may be\n"
1682 "up to 127 characters in length. Additional characters and the\n"
1683 "terminating newline character are discarded. While reading\n"
1684 "the password, echoing and the generation of signals by special\n"
1685 "characters is disabled.")
1686 #define FUNC_NAME s_scm_getpass
1691 SCM_VALIDATE_STRING (1, prompt
);
1693 WITH_STRING (prompt
, c_prompt
,
1694 p
= getpass(c_prompt
));
1695 passwd
= scm_from_locale_string (p
);
1697 /* Clear out the password in the static buffer. */
1698 memset (p
, 0, strlen (p
));
1703 #endif /* HAVE_GETPASS */
1705 /* Wrapper function for flock() support under M$-Windows. */
1708 # include <sys/locking.h>
1711 /* Current MinGW package fails to define this. *sigh* */
1712 # define _LK_UNLCK 0
1719 static int flock (int fd
, int operation
)
1724 /* Disable invalid arguments. */
1725 if (((operation
& (LOCK_EX
| LOCK_SH
)) == (LOCK_EX
| LOCK_SH
)) ||
1726 ((operation
& (LOCK_EX
| LOCK_UN
)) == (LOCK_EX
| LOCK_UN
)) ||
1727 ((operation
& (LOCK_SH
| LOCK_UN
)) == (LOCK_SH
| LOCK_UN
)))
1733 /* Determine mode of operation and discard unsupported ones. */
1734 if (operation
== (LOCK_NB
| LOCK_EX
))
1735 operation
= _LK_NBLCK
;
1736 else if (operation
& LOCK_UN
)
1737 operation
= _LK_UNLCK
;
1738 else if (operation
== LOCK_EX
)
1739 operation
= _LK_LOCK
;
1746 /* Save current file pointer and seek to beginning. */
1747 if ((pos
= lseek (fd
, 0, SEEK_CUR
)) == -1 || (len
= filelength (fd
)) == -1)
1749 lseek (fd
, 0L, SEEK_SET
);
1751 /* Deadlock if necessary. */
1754 ret
= _locking (fd
, operation
, len
);
1756 while (ret
== -1 && errno
== EDEADLOCK
);
1758 /* Produce meaningful error message. */
1759 if (errno
== EACCES
&& operation
== _LK_NBLCK
)
1764 /* Return to saved file position pointer. */
1765 lseek (fd
, pos
, SEEK_SET
);
1769 #endif /* __MINGW32__ */
1771 #if HAVE_FLOCK || defined (__MINGW32__)
1772 SCM_DEFINE (scm_flock
, "flock", 2, 0, 0,
1773 (SCM file
, SCM operation
),
1774 "Apply or remove an advisory lock on an open file.\n"
1775 "@var{operation} specifies the action to be done:\n"
1778 "Shared lock. More than one process may hold a shared lock\n"
1779 "for a given file at a given time.\n"
1782 "Exclusive lock. Only one process may hold an exclusive lock\n"
1783 "for a given file at a given time.\n"
1786 "Unlock the file.\n"
1789 "Don't block when locking. This is combined with one of the\n"
1790 "other operations using @code{logior}. If @code{flock} would\n"
1791 "block an @code{EWOULDBLOCK} error is thrown.\n"
1794 "The return value is not specified. @var{file} may be an open\n"
1795 "file descriptor or an open file descriptor port.\n"
1797 "Note that @code{flock} does not lock files across NFS.")
1798 #define FUNC_NAME s_scm_flock
1802 if (scm_is_integer (file
))
1803 fdes
= scm_to_int (file
);
1806 SCM_VALIDATE_OPFPORT (2, file
);
1808 fdes
= SCM_FPORT_FDES (file
);
1810 if (flock (fdes
, scm_to_int (operation
)) == -1)
1812 return SCM_UNSPECIFIED
;
1815 #endif /* HAVE_FLOCK */
1817 #if HAVE_SETHOSTNAME
1818 SCM_DEFINE (scm_sethostname
, "sethostname", 1, 0, 0,
1820 "Set the host name of the current processor to @var{name}. May\n"
1821 "only be used by the superuser. The return value is not\n"
1823 #define FUNC_NAME s_scm_sethostname
1827 WITH_STRING (name
, c_name
,
1828 rv
= sethostname (c_name
, strlen(c_name
)));
1831 return SCM_UNSPECIFIED
;
1834 #endif /* HAVE_SETHOSTNAME */
1837 #if HAVE_GETHOSTNAME
1838 SCM_DEFINE (scm_gethostname
, "gethostname", 0, 0, 0,
1840 "Return the host name of the current processor.")
1841 #define FUNC_NAME s_scm_gethostname
1843 #ifdef MAXHOSTNAMELEN
1845 /* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
1846 * On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
1847 const int len
= MAXHOSTNAMELEN
+ 1;
1848 char *const p
= scm_malloc (len
);
1849 const int res
= gethostname (p
, len
);
1851 scm_dynwind_begin (0);
1852 scm_dynwind_unwind_handler (free
, p
, 0);
1856 /* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
1857 * large enough. SUSv2 specifies 255 maximum too, apparently. */
1862 # if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
1864 /* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
1865 * which may reflect a particular kernel configuration.
1866 * Must watch out for this existing but giving -1, as happens for instance
1867 * in gnu/linux glibc 2.3.2. */
1869 const long int n
= sysconf (_SC_HOST_NAME_MAX
);
1876 p
= scm_malloc (len
);
1878 scm_dynwind_begin (0);
1879 scm_dynwind_unwind_handler (free
, p
, 0);
1881 res
= gethostname (p
, len
);
1882 while (res
== -1 && errno
== ENAMETOOLONG
)
1886 /* scm_realloc may throw an exception. */
1887 p
= scm_realloc (p
, len
);
1888 res
= gethostname (p
, len
);
1895 const int save_errno
= errno
;
1897 /* No guile exceptions can occur before we have freed p's memory. */
1906 /* scm_from_locale_string may throw an exception. */
1907 const SCM name
= scm_from_locale_string (p
);
1909 /* No guile exceptions can occur before we have freed p's memory. */
1917 #endif /* HAVE_GETHOSTNAME */
1923 scm_add_feature ("posix");
1925 scm_add_feature ("EIDs");
1928 scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY
));
1931 scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP
));
1934 scm_c_define ("WNOHANG", scm_from_int (WNOHANG
));
1937 scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED
));
1940 /* access() symbols. */
1941 scm_c_define ("R_OK", scm_from_int (R_OK
));
1942 scm_c_define ("W_OK", scm_from_int (W_OK
));
1943 scm_c_define ("X_OK", scm_from_int (X_OK
));
1944 scm_c_define ("F_OK", scm_from_int (F_OK
));
1947 scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE
));
1950 scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE
));
1953 scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY
));
1956 scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC
));
1959 scm_c_define ("LC_TIME", scm_from_int (LC_TIME
));
1962 scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES
));
1965 scm_c_define ("LC_ALL", scm_from_int (LC_ALL
));
1968 scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER
));
1971 scm_c_define ("LC_NAME", scm_from_int (LC_NAME
));
1974 scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS
));
1977 scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE
));
1979 #ifdef LC_MEASUREMENT
1980 scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT
));
1982 #ifdef LC_IDENTIFICATION
1983 scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION
));
1986 scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF
));
1990 scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS
));
1993 scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP
));
1996 scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER
));
2000 scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH
));
2003 scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX
));
2006 scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN
));
2009 scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB
));
2012 #include "libguile/cpp_sig_symbols.c"
2013 #include "libguile/posix.x"