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/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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/* Make GNU/Linux libc declare everything it has. */
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#include "libguile/_scm.h"
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#include "libguile/dynwind.h"
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#include "libguile/fports.h"
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#include "libguile/scmsigs.h"
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#include "libguile/feature.h"
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#include "libguile/strings.h"
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#include "libguile/srfi-13.h"
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#include "libguile/srfi-14.h"
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#include "libguile/vectors.h"
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#include "libguile/lang.h"
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#include "libguile/validate.h"
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#include "libguile/posix.h"
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#include "libguile/i18n.h"
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#include "libguile/threads.h"
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#ifdef TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <sys/time.h>
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extern char *ttyname();
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#ifdef LIBC_H_WITH_UNISTD_H
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#include <sys/types.h>
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#ifdef HAVE_WINSOCK2_H
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/* Some defines for Windows here. */
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# define pipe(fd) _pipe (fd, 256, O_BINARY)
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#endif /* __MINGW32__ */
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# include <sys/wait.h>
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# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
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# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
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extern char ** environ;
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#ifdef HAVE_SYS_UTSNAME_H
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#include <sys/utsname.h>
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#ifdef HAVE_SETLOCALE
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#include <netdb.h> /* for MAXHOSTNAMELEN on Solaris */
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h> /* for MAXHOSTNAMELEN */
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#if HAVE_SYS_RESOURCE_H
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# include <sys/resource.h>
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# include <sys/file.h>
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#if HAVE_CRT_EXTERNS_H
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#include <crt_externs.h> /* for Darwin _NSGetEnviron */
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/* Some Unix systems don't define these. CPP hair is dangerous, but
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this seems safe enough... */
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/* No prototype for this on Solaris 10. The man page says it's in
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<unistd.h> ... but it lies. */
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#if ! HAVE_DECL_SETHOSTNAME
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int sethostname (char *name, size_t namelen);
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/* On NextStep, <utime.h> doesn't define struct utime, unless we
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#define _POSIX_SOURCE before #including it. I think this is less
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of a kludge than defining struct utimbuf ourselves. */
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#ifdef UTIMBUF_NEEDS_POSIX
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#define _POSIX_SOURCE
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#ifdef HAVE_SYS_UTIME_H
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#include <sys/utime.h>
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/* Please don't add any more #includes or #defines here. The hack
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above means that _POSIX_SOURCE may be #defined, which will
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encourage header files to do strange things.
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FIXME: Maybe should undef _POSIX_SOURCE after it's done its job.
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FIXME: Probably should do all the includes first, then all the fallback
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declarations and defines, in case things are not in the header we
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/* On Apple Darwin in a shared library there's no "environ" to access
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directly, instead the address of that variable must be obtained with
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#if HAVE__NSGETENVIRON && defined (PIC)
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#define environ (*_NSGetEnviron())
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/* Two often used patterns
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#define WITH_STRING(str,cstr,code) \
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char *cstr = scm_to_locale_string (str); \
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#define STRING_SYSCALL(str,cstr,code) \
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char *cstr = scm_to_locale_string (str); \
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SCM_SYSCALL (code); \
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eno = errno; free (cstr); errno = eno; \
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SCM_SYMBOL (sym_read_pipe, "read pipe");
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SCM_SYMBOL (sym_write_pipe, "write pipe");
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SCM_DEFINE (scm_pipe, "pipe", 0, 0, 0,
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"Return a newly created pipe: a pair of ports which are linked\n"
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"together on the local machine. The @emph{car} is the input\n"
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"port and the @emph{cdr} is the output port. Data written (and\n"
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"flushed) to the output port can be read from the input port.\n"
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"Pipes are commonly used for communication with a newly forked\n"
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"child process. The need to flush the output port can be\n"
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"avoided by making it unbuffered using @code{setvbuf}.\n"
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"Writes occur atomically provided the size of the data in bytes\n"
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"is not greater than the value of @code{PIPE_BUF}. Note that\n"
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"the output port is likely to block if too much data (typically\n"
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"equal to @code{PIPE_BUF}) has been written but not yet read\n"
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"from the input port.")
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#define FUNC_NAME s_scm_pipe
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p_rd = scm_fdes_to_port (fd[0], "r", sym_read_pipe);
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p_wt = scm_fdes_to_port (fd[1], "w", sym_write_pipe);
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return scm_cons (p_rd, p_wt);
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#ifdef HAVE_GETGROUPS
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SCM_DEFINE (scm_getgroups, "getgroups", 0, 0, 0,
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"Return a vector of integers representing the current\n"
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"supplementary group IDs.")
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#define FUNC_NAME s_scm_getgroups
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ngroups = getgroups (0, NULL);
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size = ngroups * sizeof (GETGROUPS_T);
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groups = scm_malloc (size);
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getgroups (ngroups, groups);
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result = scm_c_make_vector (ngroups, SCM_BOOL_F);
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while (--ngroups >= 0)
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SCM_SIMPLE_VECTOR_SET (result, ngroups, scm_from_ulong (groups[ngroups]));
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#ifdef HAVE_SETGROUPS
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SCM_DEFINE (scm_setgroups, "setgroups", 1, 0, 0,
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"Set the current set of supplementary group IDs to the integers\n"
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"in the given vector @var{vec}. The return value is\n"
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"Generally only the superuser can set the process group IDs.")
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#define FUNC_NAME s_scm_setgroups
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SCM_VALIDATE_VECTOR (SCM_ARG1, group_vec);
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ngroups = SCM_SIMPLE_VECTOR_LENGTH (group_vec);
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/* validate before allocating, so we don't have to worry about leaks */
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for (i = 0; i < ngroups; i++)
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unsigned long ulong_gid;
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SCM_VALIDATE_ULONG_COPY (1, SCM_SIMPLE_VECTOR_REF (group_vec, i),
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if (gid != ulong_gid)
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SCM_OUT_OF_RANGE (1, SCM_SIMPLE_VECTOR_REF (group_vec, i));
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size = ngroups * sizeof (GETGROUPS_T);
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if (size / sizeof (GETGROUPS_T) != ngroups)
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SCM_OUT_OF_RANGE (SCM_ARG1, scm_from_int (ngroups));
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groups = scm_malloc (size);
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for(i = 0; i < ngroups; i++)
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groups [i] = SCM_NUM2ULONG (1, SCM_SIMPLE_VECTOR_REF (group_vec, i));
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result = setgroups (ngroups, groups);
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save_errno = errno; /* don't let free() touch errno */
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_getpwuid, "getpw", 0, 1, 0,
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"Look up an entry in the user database. @var{obj} can be an integer,\n"
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"a string, or omitted, giving the behaviour of getpwuid, getpwnam\n"
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"or getpwent respectively.")
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#define FUNC_NAME s_scm_getpwuid
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struct passwd *entry;
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SCM result = scm_c_make_vector (7, SCM_UNSPECIFIED);
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if (SCM_UNBNDP (user) || scm_is_false (user))
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SCM_SYSCALL (entry = getpwent ());
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else if (scm_is_integer (user))
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entry = getpwuid (scm_to_int (user));
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WITH_STRING (user, c_user,
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entry = getpwnam (c_user));
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SCM_MISC_ERROR ("entry not found", SCM_EOL);
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SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (entry->pw_name));
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SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_locale_string (entry->pw_passwd));
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SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_ulong (entry->pw_uid));
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SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_ulong (entry->pw_gid));
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SCM_SIMPLE_VECTOR_SET(result, 4, scm_from_locale_string (entry->pw_gecos));
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SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (""));
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SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (entry->pw_dir));
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if (!entry->pw_shell)
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SCM_SIMPLE_VECTOR_SET(result, 6, scm_from_locale_string (""));
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SCM_SIMPLE_VECTOR_SET(result, 6, scm_from_locale_string (entry->pw_shell));
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#endif /* HAVE_GETPWENT */
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SCM_DEFINE (scm_setpwent, "setpw", 0, 1, 0,
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"If called with a true argument, initialize or reset the password data\n"
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"stream. Otherwise, close the stream. The @code{setpwent} and\n"
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"@code{endpwent} procedures are implemented on top of this.")
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#define FUNC_NAME s_scm_setpwent
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if (SCM_UNBNDP (arg) || scm_is_false (arg))
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return SCM_UNSPECIFIED;
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/* Combines getgrgid and getgrnam. */
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SCM_DEFINE (scm_getgrgid, "getgr", 0, 1, 0,
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"Look up an entry in the group database. @var{obj} can be an integer,\n"
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"a string, or omitted, giving the behaviour of getgrgid, getgrnam\n"
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"or getgrent respectively.")
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#define FUNC_NAME s_scm_getgrgid
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SCM result = scm_c_make_vector (4, SCM_UNSPECIFIED);
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if (SCM_UNBNDP (name) || scm_is_false (name))
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SCM_SYSCALL (entry = getgrent ());
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else if (scm_is_integer (name))
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SCM_SYSCALL (entry = getgrgid (scm_to_int (name)));
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STRING_SYSCALL (name, c_name,
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entry = getgrnam (c_name));
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SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (entry->gr_name));
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SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_locale_string (entry->gr_passwd));
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SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_ulong (entry->gr_gid));
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SCM_SIMPLE_VECTOR_SET(result, 3, scm_makfromstrs (-1, entry->gr_mem));
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SCM_DEFINE (scm_setgrent, "setgr", 0, 1, 0,
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"If called with a true argument, initialize or reset the group data\n"
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"stream. Otherwise, close the stream. The @code{setgrent} and\n"
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"@code{endgrent} procedures are implemented on top of this.")
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#define FUNC_NAME s_scm_setgrent
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if (SCM_UNBNDP (arg) || scm_is_false (arg))
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return SCM_UNSPECIFIED;
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#endif /* HAVE_GETGRENT */
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SCM_DEFINE (scm_kill, "kill", 2, 0, 0,
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"Sends a signal to the specified process or group of processes.\n\n"
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"@var{pid} specifies the processes to which the signal is sent:\n\n"
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"@item @var{pid} greater than 0\n"
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"The process whose identifier is @var{pid}.\n"
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"@item @var{pid} equal to 0\n"
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"All processes in the current process group.\n"
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"@item @var{pid} less than -1\n"
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"The process group whose identifier is -@var{pid}\n"
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"@item @var{pid} equal to -1\n"
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"If the process is privileged, all processes except for some special\n"
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"system processes. Otherwise, all processes with the current effective\n"
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"@var{sig} should be specified using a variable corresponding to\n"
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"the Unix symbolic name, e.g.,\n\n"
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"Interrupt signal.\n"
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#define FUNC_NAME s_scm_kill
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/* Signal values are interned in scm_init_posix(). */
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if (kill (scm_to_int (pid), scm_to_int (sig)) != 0)
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if (scm_to_int (pid) == getpid ())
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if (raise (scm_to_int (sig)) != 0)
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_waitpid, "waitpid", 1, 1, 0,
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(SCM pid, SCM options),
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"This procedure collects status information from a child process which\n"
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"has terminated or (optionally) stopped. Normally it will\n"
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"suspend the calling process until this can be done. If more than one\n"
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"child process is eligible then one will be chosen by the operating system.\n\n"
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"The value of @var{pid} determines the behaviour:\n\n"
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"@item @var{pid} greater than 0\n"
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"Request status information from the specified child process.\n"
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"@item @var{pid} equal to -1 or WAIT_ANY\n"
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"Request status information for any child process.\n"
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"@item @var{pid} equal to 0 or WAIT_MYPGRP\n"
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"Request status information for any child process in the current process\n"
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"@item @var{pid} less than -1\n"
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"Request status information for any child process whose process group ID\n"
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"The @var{options} argument, if supplied, should be the bitwise OR of the\n"
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"values of zero or more of the following variables:\n\n"
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"Return immediately even if there are no child processes to be collected.\n"
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"@defvar WUNTRACED\n"
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"Report status information for stopped processes as well as terminated\n"
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"The return value is a pair containing:\n\n"
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"The process ID of the child process, or 0 if @code{WNOHANG} was\n"
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"specified and no process was collected.\n"
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"The integer status value.\n"
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#define FUNC_NAME s_scm_waitpid
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if (SCM_UNBNDP (options))
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/* Flags are interned in scm_init_posix. */
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ioptions = scm_to_int (options);
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SCM_SYSCALL (i = waitpid (scm_to_int (pid), &status, ioptions));
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return scm_cons (scm_from_int (i), scm_from_int (status));
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#endif /* HAVE_WAITPID */
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SCM_DEFINE (scm_status_exit_val, "status:exit-val", 1, 0, 0,
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"Return the exit status value, as would be set if a process\n"
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"ended normally through a call to @code{exit} or @code{_exit},\n"
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"if any, otherwise @code{#f}.")
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#define FUNC_NAME s_scm_status_exit_val
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/* On Ultrix, the WIF... macros assume their argument is an lvalue;
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lstatus = scm_to_int (status);
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if (WIFEXITED (lstatus))
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return (scm_from_int (WEXITSTATUS (lstatus)));
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SCM_DEFINE (scm_status_term_sig, "status:term-sig", 1, 0, 0,
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"Return the signal number which terminated the process, if any,\n"
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"otherwise @code{#f}.")
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#define FUNC_NAME s_scm_status_term_sig
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lstatus = scm_to_int (status);
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if (WIFSIGNALED (lstatus))
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return scm_from_int (WTERMSIG (lstatus));
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SCM_DEFINE (scm_status_stop_sig, "status:stop-sig", 1, 0, 0,
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"Return the signal number which stopped the process, if any,\n"
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"otherwise @code{#f}.")
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#define FUNC_NAME s_scm_status_stop_sig
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lstatus = scm_to_int (status);
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if (WIFSTOPPED (lstatus))
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return scm_from_int (WSTOPSIG (lstatus));
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#endif /* __MINGW32__ */
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SCM_DEFINE (scm_getppid, "getppid", 0, 0, 0,
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"Return an integer representing the process ID of the parent\n"
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#define FUNC_NAME s_scm_getppid
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return scm_from_int (getppid ());
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#endif /* HAVE_GETPPID */
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SCM_DEFINE (scm_getuid, "getuid", 0, 0, 0,
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"Return an integer representing the current real user ID.")
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#define FUNC_NAME s_scm_getuid
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return scm_from_int (getuid ());
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SCM_DEFINE (scm_getgid, "getgid", 0, 0, 0,
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"Return an integer representing the current real group ID.")
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#define FUNC_NAME s_scm_getgid
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return scm_from_int (getgid ());
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SCM_DEFINE (scm_geteuid, "geteuid", 0, 0, 0,
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"Return an integer representing the current effective user ID.\n"
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"If the system does not support effective IDs, then the real ID\n"
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"is returned. @code{(provided? 'EIDs)} reports whether the\n"
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"system supports effective IDs.")
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#define FUNC_NAME s_scm_geteuid
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return scm_from_int (geteuid ());
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return scm_from_int (getuid ());
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SCM_DEFINE (scm_getegid, "getegid", 0, 0, 0,
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"Return an integer representing the current effective group ID.\n"
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"If the system does not support effective IDs, then the real ID\n"
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"is returned. @code{(provided? 'EIDs)} reports whether the\n"
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"system supports effective IDs.")
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#define FUNC_NAME s_scm_getegid
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return scm_from_int (getegid ());
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return scm_from_int (getgid ());
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SCM_DEFINE (scm_setuid, "setuid", 1, 0, 0,
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"Sets both the real and effective user IDs to the integer @var{id}, provided\n"
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"the process has appropriate privileges.\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_setuid
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if (setuid (scm_to_int (id)) != 0)
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_setgid, "setgid", 1, 0, 0,
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"Sets both the real and effective group IDs to the integer @var{id}, provided\n"
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"the process has appropriate privileges.\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_setgid
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if (setgid (scm_to_int (id)) != 0)
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_seteuid, "seteuid", 1, 0, 0,
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"Sets the effective user ID to the integer @var{id}, provided the process\n"
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"has appropriate privileges. If effective IDs are not supported, the\n"
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"real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
710
"system supports effective IDs.\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_seteuid
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rv = seteuid (scm_to_int (id));
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rv = setuid (scm_to_int (id));
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return SCM_UNSPECIFIED;
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#endif /* __MINGW32__ */
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SCM_DEFINE (scm_setegid, "setegid", 1, 0, 0,
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"Sets the effective group ID to the integer @var{id}, provided the process\n"
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"has appropriate privileges. If effective IDs are not supported, the\n"
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"real ID is set instead -- @code{(provided? 'EIDs)} reports whether the\n"
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"system supports effective IDs.\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_setegid
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rv = setegid (scm_to_int (id));
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rv = setgid (scm_to_int (id));
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_getpgrp, "getpgrp", 0, 0, 0,
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"Return an integer representing the current process group ID.\n"
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"This is the POSIX definition, not BSD.")
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#define FUNC_NAME s_scm_getpgrp
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fn = (int (*) ()) getpgrp;
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return scm_from_int (fn (0));
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#endif /* HAVE_GETPGRP */
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SCM_DEFINE (scm_setpgid, "setpgid", 2, 0, 0,
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"Move the process @var{pid} into the process group @var{pgid}. @var{pid} or\n"
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"@var{pgid} must be integers: they can be zero to indicate the ID of the\n"
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"Fails on systems that do not support job control.\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_setpgid
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/* FIXME(?): may be known as setpgrp. */
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if (setpgid (scm_to_int (pid), scm_to_int (pgid)) != 0)
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return SCM_UNSPECIFIED;
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#endif /* HAVE_SETPGID */
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SCM_DEFINE (scm_setsid, "setsid", 0, 0, 0,
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"Creates a new session. The current process becomes the session leader\n"
792
"and is put in a new process group. The process will be detached\n"
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"from its controlling terminal if it has one.\n"
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"The return value is an integer representing the new process group ID.")
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#define FUNC_NAME s_scm_setsid
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pid_t sid = setsid ();
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return SCM_UNSPECIFIED;
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#endif /* HAVE_SETSID */
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/* ttyname returns its result in a single static buffer, hence
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scm_i_misc_mutex for thread safety. In glibc 2.3.2 two threads
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continuously calling ttyname will otherwise get an overwrite quite
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ttyname_r (when available) could be used instead of scm_i_misc_mutex, but
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there's probably little to be gained in either speed or parallelism. */
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SCM_DEFINE (scm_ttyname, "ttyname", 1, 0, 0,
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"Return a string with the name of the serial terminal device\n"
818
"underlying @var{port}.")
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#define FUNC_NAME s_scm_ttyname
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port = SCM_COERCE_OUTPORT (port);
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SCM_VALIDATE_OPPORT (1, port);
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if (!SCM_FPORTP (port))
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fd = SCM_FPORT_FDES (port);
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scm_i_scm_pthread_mutex_lock (&scm_i_misc_mutex);
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SCM_SYSCALL (result = ttyname (fd));
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ret = scm_from_locale_string (result);
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scm_i_pthread_mutex_unlock (&scm_i_misc_mutex);
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#endif /* HAVE_TTYNAME */
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/* For thread safety "buf" is used instead of NULL for the ctermid static
849
buffer. Actually it's unlikely the controlling terminal will change
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during program execution, and indeed on glibc (2.3.2) it's always just
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"/dev/tty", but L_ctermid on the stack is easy and fast and guarantees
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safety everywhere. */
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SCM_DEFINE (scm_ctermid, "ctermid", 0, 0, 0,
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"Return a string containing the file name of the controlling\n"
857
"terminal for the current process.")
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#define FUNC_NAME s_scm_ctermid
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char *result = ctermid (buf);
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return scm_from_locale_string (result);
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#endif /* HAVE_CTERMID */
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#ifdef HAVE_TCGETPGRP
870
SCM_DEFINE (scm_tcgetpgrp, "tcgetpgrp", 1, 0, 0,
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"Return the process group ID of the foreground process group\n"
873
"associated with the terminal open on the file descriptor\n"
874
"underlying @var{port}.\n"
876
"If there is no foreground process group, the return value is a\n"
877
"number greater than 1 that does not match the process group ID\n"
878
"of any existing process group. This can happen if all of the\n"
879
"processes in the job that was formerly the foreground job have\n"
880
"terminated, and no other job has yet been moved into the\n"
882
#define FUNC_NAME s_scm_tcgetpgrp
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port = SCM_COERCE_OUTPORT (port);
889
SCM_VALIDATE_OPFPORT (1, port);
890
fd = SCM_FPORT_FDES (port);
891
if ((pgid = tcgetpgrp (fd)) == -1)
893
return scm_from_int (pgid);
896
#endif /* HAVE_TCGETPGRP */
898
#ifdef HAVE_TCSETPGRP
899
SCM_DEFINE (scm_tcsetpgrp, "tcsetpgrp", 2, 0, 0,
900
(SCM port, SCM pgid),
901
"Set the foreground process group ID for the terminal used by the file\n"
902
"descriptor underlying @var{port} to the integer @var{pgid}.\n"
903
"The calling process\n"
904
"must be a member of the same session as @var{pgid} and must have the same\n"
905
"controlling terminal. The return value is unspecified.")
906
#define FUNC_NAME s_scm_tcsetpgrp
910
port = SCM_COERCE_OUTPORT (port);
912
SCM_VALIDATE_OPFPORT (1, port);
913
fd = SCM_FPORT_FDES (port);
914
if (tcsetpgrp (fd, scm_to_int (pgid)) == -1)
916
return SCM_UNSPECIFIED;
919
#endif /* HAVE_TCSETPGRP */
922
free_string_pointers (void *data)
924
scm_i_free_string_pointers ((char **)data);
927
SCM_DEFINE (scm_execl, "execl", 1, 0, 1,
928
(SCM filename, SCM args),
929
"Executes the file named by @var{path} as a new process image.\n"
930
"The remaining arguments are supplied to the process; from a C program\n"
931
"they are accessible as the @code{argv} argument to @code{main}.\n"
932
"Conventionally the first @var{arg} is the same as @var{path}.\n"
933
"All arguments must be strings.\n\n"
934
"If @var{arg} is missing, @var{path} is executed with a null\n"
935
"argument list, which may have system-dependent side-effects.\n\n"
936
"This procedure is currently implemented using the @code{execv} system\n"
937
"call, but we call it @code{execl} because of its Scheme calling interface.")
938
#define FUNC_NAME s_scm_execl
943
scm_dynwind_begin (0);
945
exec_file = scm_to_locale_string (filename);
946
scm_dynwind_free (exec_file);
948
exec_argv = scm_i_allocate_string_pointers (args);
949
scm_dynwind_unwind_handler (free_string_pointers, exec_argv,
950
SCM_F_WIND_EXPLICITLY);
954
/* extra "const" in mingw formals, provokes warning from gcc */
955
(const char * const *)
966
SCM_DEFINE (scm_execlp, "execlp", 1, 0, 1,
967
(SCM filename, SCM args),
968
"Similar to @code{execl}, however if\n"
969
"@var{filename} does not contain a slash\n"
970
"then the file to execute will be located by searching the\n"
971
"directories listed in the @code{PATH} environment variable.\n\n"
972
"This procedure is currently implemented using the @code{execvp} system\n"
973
"call, but we call it @code{execlp} because of its Scheme calling interface.")
974
#define FUNC_NAME s_scm_execlp
979
scm_dynwind_begin (0);
981
exec_file = scm_to_locale_string (filename);
982
scm_dynwind_free (exec_file);
984
exec_argv = scm_i_allocate_string_pointers (args);
985
scm_dynwind_unwind_handler (free_string_pointers, exec_argv,
986
SCM_F_WIND_EXPLICITLY);
990
/* extra "const" in mingw formals, provokes warning from gcc */
991
(const char * const *)
1003
/* OPTIMIZE-ME: scm_execle doesn't need malloced copies of the environment
1004
list strings the way environ_list_to_c gives. */
1006
SCM_DEFINE (scm_execle, "execle", 2, 0, 1,
1007
(SCM filename, SCM env, SCM args),
1008
"Similar to @code{execl}, but the environment of the new process is\n"
1009
"specified by @var{env}, which must be a list of strings as returned by the\n"
1010
"@code{environ} procedure.\n\n"
1011
"This procedure is currently implemented using the @code{execve} system\n"
1012
"call, but we call it @code{execle} because of its Scheme calling interface.")
1013
#define FUNC_NAME s_scm_execle
1019
scm_dynwind_begin (0);
1021
exec_file = scm_to_locale_string (filename);
1022
scm_dynwind_free (exec_file);
1024
exec_argv = scm_i_allocate_string_pointers (args);
1025
scm_dynwind_unwind_handler (free_string_pointers, exec_argv,
1026
SCM_F_WIND_EXPLICITLY);
1028
exec_env = scm_i_allocate_string_pointers (env);
1029
scm_dynwind_unwind_handler (free_string_pointers, exec_env,
1030
SCM_F_WIND_EXPLICITLY);
1034
/* extra "const" in mingw formals, provokes warning from gcc */
1035
(const char * const *)
1039
/* extra "const" in mingw formals, provokes warning from gcc */
1040
(const char * const *)
1052
SCM_DEFINE (scm_fork, "primitive-fork", 0, 0, 0,
1054
"Creates a new \"child\" process by duplicating the current \"parent\" process.\n"
1055
"In the child the return value is 0. In the parent the return value is\n"
1056
"the integer process ID of the child.\n\n"
1057
"This procedure has been renamed from @code{fork} to avoid a naming conflict\n"
1058
"with the scsh fork.")
1059
#define FUNC_NAME s_scm_fork
1065
return scm_from_int (pid);
1068
#endif /* HAVE_FORK */
1071
# include "win32-uname.h"
1074
#if defined (HAVE_UNAME) || defined (__MINGW32__)
1075
SCM_DEFINE (scm_uname, "uname", 0, 0, 0,
1077
"Return an object with some information about the computer\n"
1078
"system the program is running on.")
1079
#define FUNC_NAME s_scm_uname
1082
SCM result = scm_c_make_vector (5, SCM_UNSPECIFIED);
1083
if (uname (&buf) < 0)
1085
SCM_SIMPLE_VECTOR_SET(result, 0, scm_from_locale_string (buf.sysname));
1086
SCM_SIMPLE_VECTOR_SET(result, 1, scm_from_locale_string (buf.nodename));
1087
SCM_SIMPLE_VECTOR_SET(result, 2, scm_from_locale_string (buf.release));
1088
SCM_SIMPLE_VECTOR_SET(result, 3, scm_from_locale_string (buf.version));
1089
SCM_SIMPLE_VECTOR_SET(result, 4, scm_from_locale_string (buf.machine));
1092
SCM_SIMPLE_VECTOR_SET(result, 5, scm_from_locale_string (buf.domainname));
1097
#endif /* HAVE_UNAME */
1099
SCM_DEFINE (scm_environ, "environ", 0, 1, 0,
1101
"If @var{env} is omitted, return the current environment (in the\n"
1102
"Unix sense) as a list of strings. Otherwise set the current\n"
1103
"environment, which is also the default environment for child\n"
1104
"processes, to the supplied list of strings. Each member of\n"
1105
"@var{env} should be of the form @code{NAME=VALUE} and values of\n"
1106
"@code{NAME} should not be duplicated. If @var{env} is supplied\n"
1107
"then the return value is unspecified.")
1108
#define FUNC_NAME s_scm_environ
1110
if (SCM_UNBNDP (env))
1111
return scm_makfromstrs (-1, environ);
1116
new_environ = scm_i_allocate_string_pointers (env);
1117
/* Free the old environment, except when called for the first
1121
static int first = 1;
1123
scm_i_free_string_pointers (environ);
1126
environ = new_environ;
1127
return SCM_UNSPECIFIED;
1134
SCM_DEFINE (scm_tmpnam, "tmpnam", 0, 0, 0,
1136
"Return a name in the file system that does not match any\n"
1137
"existing file. However there is no guarantee that another\n"
1138
"process will not create the file after @code{tmpnam} is called.\n"
1139
"Care should be taken if opening the file, e.g., use the\n"
1140
"@code{O_EXCL} open flag or use @code{mkstemp!} instead.")
1141
#define FUNC_NAME s_scm_tmpnam
1143
char name[L_tmpnam];
1146
SCM_SYSCALL (rv = tmpnam (name));
1148
/* not SCM_SYSERROR since errno probably not set. */
1149
SCM_MISC_ERROR ("tmpnam failed", SCM_EOL);
1150
return scm_from_locale_string (name);
1156
#ifndef HAVE_MKSTEMP
1157
extern int mkstemp (char *);
1160
SCM_DEFINE (scm_mkstemp, "mkstemp!", 1, 0, 0,
1162
"Create a new unique file in the file system and return a new\n"
1163
"buffered port open for reading and writing to the file.\n"
1165
"@var{tmpl} is a string specifying where the file should be\n"
1166
"created: it must end with @samp{XXXXXX} and those @samp{X}s\n"
1167
"will be changed in the string to return the name of the file.\n"
1168
"(@code{port-filename} on the port also gives the name.)\n"
1170
"POSIX doesn't specify the permissions mode of the file, on GNU\n"
1171
"and most systems it's @code{#o600}. An application can use\n"
1172
"@code{chmod} to relax that if desired. For example\n"
1173
"@code{#o666} less @code{umask}, which is usual for ordinary\n"
1177
"(let ((port (mkstemp! (string-copy \"/tmp/myfile-XXXXXX\"))))\n"
1178
" (chmod port (logand #o666 (lognot (umask))))\n"
1181
#define FUNC_NAME s_scm_mkstemp
1186
scm_dynwind_begin (0);
1188
c_tmpl = scm_to_locale_string (tmpl);
1189
scm_dynwind_free (c_tmpl);
1191
SCM_SYSCALL (rv = mkstemp (c_tmpl));
1195
scm_substring_move_x (scm_from_locale_string (c_tmpl),
1196
SCM_INUM0, scm_string_length (tmpl),
1200
return scm_fdes_to_port (rv, "w+", tmpl);
1204
SCM_DEFINE (scm_utime, "utime", 1, 2, 0,
1205
(SCM pathname, SCM actime, SCM modtime),
1206
"@code{utime} sets the access and modification times for the\n"
1207
"file named by @var{path}. If @var{actime} or @var{modtime} is\n"
1208
"not supplied, then the current time is used. @var{actime} and\n"
1209
"@var{modtime} must be integer time values as returned by the\n"
1210
"@code{current-time} procedure.\n"
1212
"(utime \"foo\" (- (current-time) 3600))\n"
1214
"will set the access time to one hour in the past and the\n"
1215
"modification time to the current time.")
1216
#define FUNC_NAME s_scm_utime
1219
struct utimbuf utm_tmp;
1221
if (SCM_UNBNDP (actime))
1222
SCM_SYSCALL (time (&utm_tmp.actime));
1224
utm_tmp.actime = SCM_NUM2ULONG (2, actime);
1226
if (SCM_UNBNDP (modtime))
1227
SCM_SYSCALL (time (&utm_tmp.modtime));
1229
utm_tmp.modtime = SCM_NUM2ULONG (3, modtime);
1231
STRING_SYSCALL (pathname, c_pathname,
1232
rv = utime (c_pathname, &utm_tmp));
1235
return SCM_UNSPECIFIED;
1239
SCM_DEFINE (scm_access, "access?", 2, 0, 0,
1240
(SCM path, SCM how),
1241
"Test accessibility of a file under the real UID and GID of the\n"
1242
"calling process. The return is @code{#t} if @var{path} exists\n"
1243
"and the permissions requested by @var{how} are all allowed, or\n"
1244
"@code{#f} if not.\n"
1246
"@var{how} is an integer which is one of the following values,\n"
1247
"or a bitwise-OR (@code{logior}) of multiple values.\n"
1250
"Test for read permission.\n"
1253
"Test for write permission.\n"
1256
"Test for execute permission.\n"
1259
"Test for existence of the file. This is implied by each of the\n"
1260
"other tests, so there's no need to combine it with them.\n"
1263
"It's important to note that @code{access?} does not simply\n"
1264
"indicate what will happen on attempting to read or write a\n"
1265
"file. In normal circumstances it does, but in a set-UID or\n"
1266
"set-GID program it doesn't because @code{access?} tests the\n"
1267
"real ID, whereas an open or execute attempt uses the effective\n"
1270
"A program which will never run set-UID/GID can ignore the\n"
1271
"difference between real and effective IDs, but for maximum\n"
1272
"generality, especially in library functions, it's best not to\n"
1273
"use @code{access?} to predict the result of an open or execute,\n"
1274
"instead simply attempt that and catch any exception.\n"
1276
"The main use for @code{access?} is to let a set-UID/GID program\n"
1277
"determine what the invoking user would have been allowed to do,\n"
1278
"without the greater (or perhaps lesser) privileges afforded by\n"
1279
"the effective ID. For more on this, see ``Testing File\n"
1280
"Access'' in The GNU C Library Reference Manual.")
1281
#define FUNC_NAME s_scm_access
1285
WITH_STRING (path, c_path,
1286
rv = access (c_path, scm_to_int (how)));
1287
return scm_from_bool (!rv);
1291
SCM_DEFINE (scm_getpid, "getpid", 0, 0, 0,
1293
"Return an integer representing the current process ID.")
1294
#define FUNC_NAME s_scm_getpid
1296
return scm_from_ulong (getpid ());
1300
SCM_DEFINE (scm_putenv, "putenv", 1, 0, 0,
1302
"Modifies the environment of the current process, which is\n"
1303
"also the default environment inherited by child processes.\n\n"
1304
"If @var{string} is of the form @code{NAME=VALUE} then it will be written\n"
1305
"directly into the environment, replacing any existing environment string\n"
1307
"name matching @code{NAME}. If @var{string} does not contain an equal\n"
1308
"sign, then any existing string with name matching @var{string} will\n"
1310
"The return value is unspecified.")
1311
#define FUNC_NAME s_scm_putenv
1314
char *c_str = scm_to_locale_string (str);
1316
size_t len = strlen (c_str);
1319
if (strchr (c_str, '=') == NULL)
1321
#ifdef HAVE_UNSETENV
1322
/* No '=' in argument means we should remove the variable from
1323
the environment. Not all putenvs understand this (for instance
1324
FreeBSD 4.8 doesn't). To be safe, we do it explicitely using
1329
/* On e.g. Win32 hosts putenv() called with 'name=' removes the
1330
environment variable 'name'. */
1332
char *ptr = scm_malloc (len + 2);
1333
strcpy (ptr, c_str);
1334
strcpy (ptr+len, "=");
1336
e = errno; free (ptr); free (c_str); errno = e;
1339
#endif /* !HAVE_UNSETENV */
1344
/* If str is "FOO=", ie. attempting to set an empty string, then
1345
we need to see if it's been successful. On MINGW, "FOO="
1346
means remove FOO from the environment. As a workaround, we
1347
set "FOO= ", ie. a space, and then modify the string returned
1348
by getenv. It's not enough just to modify the string we set,
1349
because MINGW putenv copies it. */
1351
if (c_str[len-1] == '=')
1353
char *ptr = scm_malloc (len+2);
1354
strcpy (ptr, c_str);
1355
strcpy (ptr+len, " ");
1364
/* truncate to just the name */
1365
c_str[len-1] = '\0';
1366
ptr = getenv (c_str);
1369
return SCM_UNSPECIFIED;
1371
#endif /* __MINGW32__ */
1373
/* Leave c_str in the environment. */
1375
rv = putenv (c_str);
1379
return SCM_UNSPECIFIED;
1383
#ifdef HAVE_SETLOCALE
1384
SCM_DEFINE (scm_setlocale, "setlocale", 1, 1, 0,
1385
(SCM category, SCM locale),
1386
"If @var{locale} is omitted, return the current value of the\n"
1387
"specified locale category as a system-dependent string.\n"
1388
"@var{category} should be specified using the values\n"
1389
"@code{LC_COLLATE}, @code{LC_ALL} etc.\n"
1391
"Otherwise the specified locale category is set to the string\n"
1392
"@var{locale} and the new value is returned as a\n"
1393
"system-dependent string. If @var{locale} is an empty string,\n"
1394
"the locale will be set using environment variables.")
1395
#define FUNC_NAME s_scm_setlocale
1400
scm_dynwind_begin (0);
1402
if (SCM_UNBNDP (locale))
1408
clocale = scm_to_locale_string (locale);
1409
scm_dynwind_free (clocale);
1412
rv = setlocale (scm_i_to_lc_category (category, 1), clocale);
1415
/* POSIX and C99 don't say anything about setlocale setting errno, so
1416
force a sensible value here. glibc leaves ENOENT, which would be
1417
fine, but it's not a documented feature. */
1422
/* Recompute the standard SRFI-14 character sets in a locale-dependent
1423
(actually charset-dependent) way. */
1424
scm_srfi_14_compute_char_sets ();
1427
return scm_from_locale_string (rv);
1430
#endif /* HAVE_SETLOCALE */
1433
SCM_DEFINE (scm_mknod, "mknod", 4, 0, 0,
1434
(SCM path, SCM type, SCM perms, SCM dev),
1435
"Creates a new special file, such as a file corresponding to a device.\n"
1436
"@var{path} specifies the name of the file. @var{type} should\n"
1437
"be one of the following symbols:\n"
1438
"regular, directory, symlink, block-special, char-special,\n"
1439
"fifo, or socket. @var{perms} (an integer) specifies the file permissions.\n"
1440
"@var{dev} (an integer) specifies which device the special file refers\n"
1441
"to. Its exact interpretation depends on the kind of special file\n"
1442
"being created.\n\n"
1445
"(mknod \"/dev/fd0\" 'block-special #o660 (+ (* 2 256) 2))\n"
1447
"The return value is unspecified.")
1448
#define FUNC_NAME s_scm_mknod
1454
SCM_VALIDATE_STRING (1, path);
1455
SCM_VALIDATE_SYMBOL (2, type);
1457
p = scm_i_symbol_chars (type);
1458
if (strcmp (p, "regular") == 0)
1460
else if (strcmp (p, "directory") == 0)
1463
/* systems without symlinks probably don't have S_IFLNK defined */
1464
else if (strcmp (p, "symlink") == 0)
1467
else if (strcmp (p, "block-special") == 0)
1469
else if (strcmp (p, "char-special") == 0)
1471
else if (strcmp (p, "fifo") == 0)
1474
else if (strcmp (p, "socket") == 0)
1478
SCM_OUT_OF_RANGE (2, type);
1480
STRING_SYSCALL (path, c_path,
1481
val = mknod (c_path,
1482
ctype | scm_to_int (perms),
1486
return SCM_UNSPECIFIED;
1489
#endif /* HAVE_MKNOD */
1492
SCM_DEFINE (scm_nice, "nice", 1, 0, 0,
1494
"Increment the priority of the current process by @var{incr}. A higher\n"
1495
"priority value means that the process runs less often.\n"
1496
"The return value is unspecified.")
1497
#define FUNC_NAME s_scm_nice
1499
/* nice() returns "prio-NZERO" on success or -1 on error, but -1 can arise
1500
from "prio-NZERO", so an error must be detected from errno changed */
1502
nice (scm_to_int (incr));
1505
return SCM_UNSPECIFIED;
1508
#endif /* HAVE_NICE */
1511
SCM_DEFINE (scm_sync, "sync", 0, 0, 0,
1513
"Flush the operating system disk buffers.\n"
1514
"The return value is unspecified.")
1515
#define FUNC_NAME s_scm_sync
1518
return SCM_UNSPECIFIED;
1521
#endif /* HAVE_SYNC */
1524
/* crypt() returns a pointer to a static buffer, so we use scm_i_misc_mutex
1525
to avoid another thread overwriting it. A test program running crypt
1526
continuously in two threads can be quickly seen tripping this problem.
1527
crypt() is pretty slow normally, so a mutex shouldn't add much overhead.
1529
glibc has a thread-safe crypt_r, but (in version 2.3.2) it runs a lot
1530
slower (about 5x) than plain crypt if you pass an uninitialized data
1531
block each time. Presumably there's some one-time setups. The best way
1532
to use crypt_r for parallel execution in multiple threads would probably
1533
be to maintain a little pool of initialized crypt_data structures, take
1534
one and use it, then return it to the pool. That pool could be garbage
1535
collected so it didn't add permanently to memory use if only a few crypt
1536
calls are made. But we expect crypt will be used rarely, and even more
1537
rarely will there be any desire for lots of parallel execution on
1538
multiple cpus. So for now we don't bother with anything fancy, just
1542
SCM_DEFINE (scm_crypt, "crypt", 2, 0, 0,
1543
(SCM key, SCM salt),
1544
"Encrypt @var{key} using @var{salt} as the salt value to the\n"
1545
"crypt(3) library call.")
1546
#define FUNC_NAME s_scm_crypt
1549
char *c_key, *c_salt;
1551
scm_dynwind_begin (0);
1552
scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex);
1554
c_key = scm_to_locale_string (key);
1555
scm_dynwind_free (c_key);
1556
c_salt = scm_to_locale_string (salt);
1557
scm_dynwind_free (c_salt);
1559
ret = scm_from_locale_string (crypt (c_key, c_salt));
1565
#endif /* HAVE_CRYPT */
1568
SCM_DEFINE (scm_chroot, "chroot", 1, 0, 0,
1570
"Change the root directory to that specified in @var{path}.\n"
1571
"This directory will be used for path names beginning with\n"
1572
"@file{/}. The root directory is inherited by all children\n"
1573
"of the current process. Only the superuser may change the\n"
1575
#define FUNC_NAME s_scm_chroot
1579
WITH_STRING (path, c_path,
1580
rv = chroot (c_path));
1583
return SCM_UNSPECIFIED;
1586
#endif /* HAVE_CHROOT */
1590
/* Wrapper function to supplying `getlogin()' under Windows. */
1591
static char * getlogin (void)
1593
static char user[256];
1594
static unsigned long len = 256;
1596
if (!GetUserName (user, &len))
1600
#endif /* __MINGW32__ */
1603
#if defined (HAVE_GETLOGIN) || defined (__MINGW32__)
1604
SCM_DEFINE (scm_getlogin, "getlogin", 0, 0, 0,
1606
"Return a string containing the name of the user logged in on\n"
1607
"the controlling terminal of the process, or @code{#f} if this\n"
1608
"information cannot be obtained.")
1609
#define FUNC_NAME s_scm_getlogin
1616
return scm_from_locale_string (p);
1619
#endif /* HAVE_GETLOGIN */
1622
SCM_DEFINE (scm_cuserid, "cuserid", 0, 0, 0,
1624
"Return a string containing a user name associated with the\n"
1625
"effective user id of the process. Return @code{#f} if this\n"
1626
"information cannot be obtained.")
1627
#define FUNC_NAME s_scm_cuserid
1629
char buf[L_cuserid];
1635
return scm_from_locale_string (p);
1638
#endif /* HAVE_CUSERID */
1640
#if HAVE_GETPRIORITY
1641
SCM_DEFINE (scm_getpriority, "getpriority", 2, 0, 0,
1642
(SCM which, SCM who),
1643
"Return the scheduling priority of the process, process group\n"
1644
"or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1645
"is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1646
"or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1647
"@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1648
"process group identifier for @code{PRIO_PGRP}, and a user\n"
1649
"identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1650
"denotes the current process, process group, or user. Return\n"
1651
"the highest priority (lowest numerical value) of any of the\n"
1652
"specified processes.")
1653
#define FUNC_NAME s_scm_getpriority
1655
int cwhich, cwho, ret;
1657
cwhich = scm_to_int (which);
1658
cwho = scm_to_int (who);
1660
/* We have to clear errno and examine it later, because -1 is a
1661
legal return value for getpriority(). */
1663
ret = getpriority (cwhich, cwho);
1666
return scm_from_int (ret);
1669
#endif /* HAVE_GETPRIORITY */
1671
#if HAVE_SETPRIORITY
1672
SCM_DEFINE (scm_setpriority, "setpriority", 3, 0, 0,
1673
(SCM which, SCM who, SCM prio),
1674
"Set the scheduling priority of the process, process group\n"
1675
"or user, as indicated by @var{which} and @var{who}. @var{which}\n"
1676
"is one of the variables @code{PRIO_PROCESS}, @code{PRIO_PGRP}\n"
1677
"or @code{PRIO_USER}, and @var{who} is interpreted relative to\n"
1678
"@var{which} (a process identifier for @code{PRIO_PROCESS},\n"
1679
"process group identifier for @code{PRIO_PGRP}, and a user\n"
1680
"identifier for @code{PRIO_USER}. A zero value of @var{who}\n"
1681
"denotes the current process, process group, or user.\n"
1682
"@var{prio} is a value in the range -20 and 20, the default\n"
1683
"priority is 0; lower priorities cause more favorable\n"
1684
"scheduling. Sets the priority of all of the specified\n"
1685
"processes. Only the super-user may lower priorities.\n"
1686
"The return value is not specified.")
1687
#define FUNC_NAME s_scm_setpriority
1689
int cwhich, cwho, cprio;
1691
cwhich = scm_to_int (which);
1692
cwho = scm_to_int (who);
1693
cprio = scm_to_int (prio);
1695
if (setpriority (cwhich, cwho, cprio) == -1)
1697
return SCM_UNSPECIFIED;
1700
#endif /* HAVE_SETPRIORITY */
1703
SCM_DEFINE (scm_getpass, "getpass", 1, 0, 0,
1705
"Display @var{prompt} to the standard error output and read\n"
1706
"a password from @file{/dev/tty}. If this file is not\n"
1707
"accessible, it reads from standard input. The password may be\n"
1708
"up to 127 characters in length. Additional characters and the\n"
1709
"terminating newline character are discarded. While reading\n"
1710
"the password, echoing and the generation of signals by special\n"
1711
"characters is disabled.")
1712
#define FUNC_NAME s_scm_getpass
1717
SCM_VALIDATE_STRING (1, prompt);
1719
WITH_STRING (prompt, c_prompt,
1720
p = getpass(c_prompt));
1721
passwd = scm_from_locale_string (p);
1723
/* Clear out the password in the static buffer. */
1724
memset (p, 0, strlen (p));
1729
#endif /* HAVE_GETPASS */
1731
/* Wrapper function for flock() support under M$-Windows. */
1734
# include <sys/locking.h>
1737
/* Current MinGW package fails to define this. *sigh* */
1738
# define _LK_UNLCK 0
1745
static int flock (int fd, int operation)
1750
/* Disable invalid arguments. */
1751
if (((operation & (LOCK_EX | LOCK_SH)) == (LOCK_EX | LOCK_SH)) ||
1752
((operation & (LOCK_EX | LOCK_UN)) == (LOCK_EX | LOCK_UN)) ||
1753
((operation & (LOCK_SH | LOCK_UN)) == (LOCK_SH | LOCK_UN)))
1759
/* Determine mode of operation and discard unsupported ones. */
1760
if (operation == (LOCK_NB | LOCK_EX))
1761
operation = _LK_NBLCK;
1762
else if (operation & LOCK_UN)
1763
operation = _LK_UNLCK;
1764
else if (operation == LOCK_EX)
1765
operation = _LK_LOCK;
1772
/* Save current file pointer and seek to beginning. */
1773
if ((pos = lseek (fd, 0, SEEK_CUR)) == -1 || (len = filelength (fd)) == -1)
1775
lseek (fd, 0L, SEEK_SET);
1777
/* Deadlock if necessary. */
1780
ret = _locking (fd, operation, len);
1782
while (ret == -1 && errno == EDEADLOCK);
1784
/* Produce meaningful error message. */
1785
if (errno == EACCES && operation == _LK_NBLCK)
1790
/* Return to saved file position pointer. */
1791
lseek (fd, pos, SEEK_SET);
1795
#endif /* __MINGW32__ */
1797
#if HAVE_FLOCK || defined (__MINGW32__)
1798
SCM_DEFINE (scm_flock, "flock", 2, 0, 0,
1799
(SCM file, SCM operation),
1800
"Apply or remove an advisory lock on an open file.\n"
1801
"@var{operation} specifies the action to be done:\n"
1804
"Shared lock. More than one process may hold a shared lock\n"
1805
"for a given file at a given time.\n"
1808
"Exclusive lock. Only one process may hold an exclusive lock\n"
1809
"for a given file at a given time.\n"
1812
"Unlock the file.\n"
1815
"Don't block when locking. This is combined with one of the\n"
1816
"other operations using @code{logior}. If @code{flock} would\n"
1817
"block an @code{EWOULDBLOCK} error is thrown.\n"
1820
"The return value is not specified. @var{file} may be an open\n"
1821
"file descriptor or an open file descriptor port.\n"
1823
"Note that @code{flock} does not lock files across NFS.")
1824
#define FUNC_NAME s_scm_flock
1828
if (scm_is_integer (file))
1829
fdes = scm_to_int (file);
1832
SCM_VALIDATE_OPFPORT (2, file);
1834
fdes = SCM_FPORT_FDES (file);
1836
if (flock (fdes, scm_to_int (operation)) == -1)
1838
return SCM_UNSPECIFIED;
1841
#endif /* HAVE_FLOCK */
1843
#if HAVE_SETHOSTNAME
1844
SCM_DEFINE (scm_sethostname, "sethostname", 1, 0, 0,
1846
"Set the host name of the current processor to @var{name}. May\n"
1847
"only be used by the superuser. The return value is not\n"
1849
#define FUNC_NAME s_scm_sethostname
1853
WITH_STRING (name, c_name,
1854
rv = sethostname (c_name, strlen(c_name)));
1857
return SCM_UNSPECIFIED;
1860
#endif /* HAVE_SETHOSTNAME */
1863
#if HAVE_GETHOSTNAME
1864
SCM_DEFINE (scm_gethostname, "gethostname", 0, 0, 0,
1866
"Return the host name of the current processor.")
1867
#define FUNC_NAME s_scm_gethostname
1869
#ifdef MAXHOSTNAMELEN
1871
/* Various systems define MAXHOSTNAMELEN (including Solaris in fact).
1872
* On GNU/Linux this doesn't include the terminating '\0', hence "+ 1". */
1873
const int len = MAXHOSTNAMELEN + 1;
1874
char *const p = scm_malloc (len);
1875
const int res = gethostname (p, len);
1877
scm_dynwind_begin (0);
1878
scm_dynwind_unwind_handler (free, p, 0);
1882
/* Default 256 is for Solaris, under Linux ENAMETOOLONG is returned if not
1883
* large enough. SUSv2 specifies 255 maximum too, apparently. */
1888
# if HAVE_SYSCONF && defined (_SC_HOST_NAME_MAX)
1890
/* POSIX specifies the HOST_NAME_MAX system parameter for the max size,
1891
* which may reflect a particular kernel configuration.
1892
* Must watch out for this existing but giving -1, as happens for instance
1893
* in gnu/linux glibc 2.3.2. */
1895
const long int n = sysconf (_SC_HOST_NAME_MAX);
1902
p = scm_malloc (len);
1904
scm_dynwind_begin (0);
1905
scm_dynwind_unwind_handler (free, p, 0);
1907
res = gethostname (p, len);
1908
while (res == -1 && errno == ENAMETOOLONG)
1912
/* scm_realloc may throw an exception. */
1913
p = scm_realloc (p, len);
1914
res = gethostname (p, len);
1921
const int save_errno = errno;
1923
/* No guile exceptions can occur before we have freed p's memory. */
1932
/* scm_from_locale_string may throw an exception. */
1933
const SCM name = scm_from_locale_string (p);
1935
/* No guile exceptions can occur before we have freed p's memory. */
1943
#endif /* HAVE_GETHOSTNAME */
1949
scm_add_feature ("posix");
1951
scm_add_feature ("EIDs");
1954
scm_c_define ("WAIT_ANY", scm_from_int (WAIT_ANY));
1957
scm_c_define ("WAIT_MYPGRP", scm_from_int (WAIT_MYPGRP));
1960
scm_c_define ("WNOHANG", scm_from_int (WNOHANG));
1963
scm_c_define ("WUNTRACED", scm_from_int (WUNTRACED));
1966
/* access() symbols. */
1967
scm_c_define ("R_OK", scm_from_int (R_OK));
1968
scm_c_define ("W_OK", scm_from_int (W_OK));
1969
scm_c_define ("X_OK", scm_from_int (X_OK));
1970
scm_c_define ("F_OK", scm_from_int (F_OK));
1973
scm_c_define ("LC_COLLATE", scm_from_int (LC_COLLATE));
1976
scm_c_define ("LC_CTYPE", scm_from_int (LC_CTYPE));
1979
scm_c_define ("LC_MONETARY", scm_from_int (LC_MONETARY));
1982
scm_c_define ("LC_NUMERIC", scm_from_int (LC_NUMERIC));
1985
scm_c_define ("LC_TIME", scm_from_int (LC_TIME));
1988
scm_c_define ("LC_MESSAGES", scm_from_int (LC_MESSAGES));
1991
scm_c_define ("LC_ALL", scm_from_int (LC_ALL));
1994
scm_c_define ("LC_PAPER", scm_from_int (LC_PAPER));
1997
scm_c_define ("LC_NAME", scm_from_int (LC_NAME));
2000
scm_c_define ("LC_ADDRESS", scm_from_int (LC_ADDRESS));
2003
scm_c_define ("LC_TELEPHONE", scm_from_int (LC_TELEPHONE));
2005
#ifdef LC_MEASUREMENT
2006
scm_c_define ("LC_MEASUREMENT", scm_from_int (LC_MEASUREMENT));
2008
#ifdef LC_IDENTIFICATION
2009
scm_c_define ("LC_IDENTIFICATION", scm_from_int (LC_IDENTIFICATION));
2012
scm_c_define ("PIPE_BUF", scm_from_long (PIPE_BUF));
2016
scm_c_define ("PRIO_PROCESS", scm_from_int (PRIO_PROCESS));
2019
scm_c_define ("PRIO_PGRP", scm_from_int (PRIO_PGRP));
2022
scm_c_define ("PRIO_USER", scm_from_int (PRIO_USER));
2026
scm_c_define ("LOCK_SH", scm_from_int (LOCK_SH));
2029
scm_c_define ("LOCK_EX", scm_from_int (LOCK_EX));
2032
scm_c_define ("LOCK_UN", scm_from_int (LOCK_UN));
2035
scm_c_define ("LOCK_NB", scm_from_int (LOCK_NB));
2038
#include "libguile/cpp_sig_symbols.c"
2039
#include "libguile/posix.x"
added
removed
libguile/posix.c
