mirror of
https://git.savannah.gnu.org/git/guile.git
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143 lines
4.4 KiB
C
143 lines
4.4 KiB
C
/* Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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#include <errno.h>
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#include "libguile/_scm.h"
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#include "libguile/scmsigs.h"
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#include "libguile/strings.h"
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#include "libguile/validate.h"
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#include "libguile/simpos.h"
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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extern int system();
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#ifdef HAVE_SYSTEM
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SCM_DEFINE (scm_system, "system", 0, 1, 0,
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(SCM cmd),
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"Execute @var{cmd} using the operating system's \"command\n"
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"processor\". Under Unix this is usually the default shell\n"
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"@code{sh}. The value returned is @var{cmd}'s exit status as\n"
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"returned by @code{waitpid}, which can be interpreted using the\n"
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"functions above.\n"
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"\n"
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"If @code{system} is called without arguments, return a boolean\n"
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"indicating whether the command processor is available.")
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#define FUNC_NAME s_scm_system
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{
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int rv;
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if (SCM_UNBNDP (cmd))
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{
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rv = system (NULL);
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return SCM_BOOL(rv);
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}
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SCM_VALIDATE_STRING (1, cmd);
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SCM_DEFER_INTS;
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errno = 0;
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rv = system (SCM_STRING_CHARS (cmd));
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if (rv == -1 || (rv == 127 && errno != 0))
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SCM_SYSERROR;
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SCM_ALLOW_INTS;
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return SCM_MAKINUM (rv);
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}
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#undef FUNC_NAME
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#endif /* HAVE_SYSTEM */
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extern char *getenv();
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SCM_DEFINE (scm_getenv, "getenv", 1, 0, 0,
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(SCM nam),
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"Looks up the string @var{name} in the current environment. The return\n"
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"value is @code{#f} unless a string of the form @code{NAME=VALUE} is\n"
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"found, in which case the string @code{VALUE} is returned.")
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#define FUNC_NAME s_scm_getenv
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{
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char *val;
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SCM_VALIDATE_STRING (1, nam);
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val = getenv (SCM_STRING_CHARS (nam));
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return val ? scm_mem2string (val, strlen (val)) : SCM_BOOL_F;
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}
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#undef FUNC_NAME
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/* simple exit, without unwinding the scheme stack or flushing ports. */
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SCM_DEFINE (scm_primitive_exit, "primitive-exit", 0, 1, 0,
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(SCM status),
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"Terminate the current process without unwinding the Scheme stack.\n"
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"This is would typically be useful after a fork. The exit status\n"
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"is @var{status} if supplied, otherwise zero.")
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#define FUNC_NAME s_scm_primitive_exit
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{
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int cstatus = 0;
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if (!SCM_UNBNDP (status))
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{
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SCM_VALIDATE_INUM (1,status);
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cstatus = SCM_INUM (status);
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}
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exit (cstatus);
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}
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#undef FUNC_NAME
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void
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scm_init_simpos ()
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{
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#include "libguile/simpos.x"
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}
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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