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/* Copyright (C) 1995,1996,1997,1998, 2000, 2001 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* The exception is that, if you link the GUILE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the GUILE library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the
* Free Software Foundation under the name GUILE. If you copy
* code from other Free Software Foundation releases into a copy of
* GUILE, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
#include <errno.h>
#include "libguile/_scm.h"
#include "libguile/scmsigs.h"
#include "libguile/strings.h"
#include "libguile/validate.h"
#include "libguile/simpos.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
extern int system();
#ifdef HAVE_SYSTEM
SCM_DEFINE (scm_system, "system", 0, 1, 0,
(SCM cmd),
"Execute @var{cmd} using the operating system's \"command\n"
"processor\". Under Unix this is usually the default shell\n"
"@code{sh}. The value returned is @var{cmd}'s exit status as\n"
"returned by @code{waitpid}, which can be interpreted using the\n"
"functions above.\n"
"\n"
"If @code{system} is called without arguments, return a boolean\n"
"indicating whether the command processor is available.")
#define FUNC_NAME s_scm_system
{
int rv;
if (SCM_UNBNDP (cmd))
{
rv = system (NULL);
return SCM_BOOL(rv);
}
SCM_VALIDATE_STRING (1, cmd);
SCM_DEFER_INTS;
errno = 0;
SCM_STRING_COERCE_0TERMINATION_X (cmd);
rv = system (SCM_STRING_CHARS (cmd));
if (rv == -1 || (rv == 127 && errno != 0))
SCM_SYSERROR;
SCM_ALLOW_INTS;
return SCM_MAKINUM (rv);
}
#undef FUNC_NAME
#endif /* HAVE_SYSTEM */
extern char *getenv();
SCM_DEFINE (scm_getenv, "getenv", 1, 0, 0,
(SCM nam),
"Looks up the string @var{name} in the current environment. The return\n"
"value is @code{#f} unless a string of the form @code{NAME=VALUE} is\n"
"found, in which case the string @code{VALUE} is returned.")
#define FUNC_NAME s_scm_getenv
{
char *val;
SCM_VALIDATE_STRING (1, nam);
SCM_STRING_COERCE_0TERMINATION_X (nam);
val = getenv (SCM_STRING_CHARS (nam));
return (val) ? scm_makfromstr(val, (size_t)strlen(val), 0) : SCM_BOOL_F;
}
#undef FUNC_NAME
/* simple exit, without unwinding the scheme stack or flushing ports. */
SCM_DEFINE (scm_primitive_exit, "primitive-exit", 0, 1, 0,
(SCM status),
"Terminate the current process without unwinding the Scheme stack.\n"
"This is would typically be useful after a fork. The exit status\n"
"is @var{status} if supplied, otherwise zero.")
#define FUNC_NAME s_scm_primitive_exit
{
int cstatus = 0;
if (!SCM_UNBNDP (status))
{
SCM_VALIDATE_INUM (1,status);
cstatus = SCM_INUM (status);
}
exit (cstatus);
}
#undef FUNC_NAME
void
scm_init_simpos ()
{
#ifndef SCM_MAGIC_SNARFER
#include "libguile/simpos.x"
#endif
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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