1 /* Copyright (C) 1995,1996,1997,1998, 2000, 2001 Free Software Foundation, Inc.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2, or (at your option)
8 * This program 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
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this software; see the file COPYING. If not, write to
15 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
21 * The exception is that, if you link the GUILE library with other files
22 * to produce an executable, this does not by itself cause the
23 * resulting executable to be covered by the GNU General Public License.
24 * Your use of that executable is in no way restricted on account of
25 * linking the GUILE library code into it.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
30 * This exception applies only to the code released by the
31 * Free Software Foundation under the name GUILE. If you copy
32 * code from other Free Software Foundation releases into a copy of
33 * GUILE, as the General Public License permits, the exception does
34 * not apply to the code that you add in this way. To avoid misleading
35 * anyone as to the status of such modified files, you must delete
36 * this exception notice from them.
38 * If you write modifications of your own for GUILE, it is your choice
39 * whether to permit this exception to apply to your modifications.
40 * If you do not wish that, delete this exception notice. */
42 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
43 gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
49 #include "libguile/_scm.h"
51 #include "libguile/scmsigs.h"
52 #include "libguile/strings.h"
54 #include "libguile/validate.h"
55 #include "libguile/simpos.h"
69 SCM_DEFINE (scm_system
, "system", 0, 1, 0,
71 "Executes @var{cmd} using the operating system's \"command processor\".\n"
72 "Under Unix this is usually the default shell @code{sh}. The value\n"
73 "returned is @var{cmd}'s exit status as returned by @code{waitpid}, which\n"
74 "can be interpreted using the functions above.\n\n"
75 "If @code{system} is called without arguments, it returns a boolean\n"
76 "indicating whether the command processor is available.")
77 #define FUNC_NAME s_scm_system
86 SCM_VALIDATE_STRING (1, cmd
);
89 SCM_STRING_COERCE_0TERMINATION_X (cmd
);
90 rv
= system (SCM_STRING_CHARS (cmd
));
91 if (rv
== -1 || (rv
== 127 && errno
!= 0))
94 return SCM_MAKINUM (rv
);
97 #endif /* HAVE_SYSTEM */
99 extern char *getenv();
100 SCM_DEFINE (scm_getenv
, "getenv", 1, 0, 0,
102 "Looks up the string @var{name} in the current environment. The return\n"
103 "value is @code{#f} unless a string of the form @code{NAME=VALUE} is\n"
104 "found, in which case the string @code{VALUE} is returned.")
105 #define FUNC_NAME s_scm_getenv
108 SCM_VALIDATE_STRING (1, nam
);
109 SCM_STRING_COERCE_0TERMINATION_X (nam
);
110 val
= getenv (SCM_STRING_CHARS (nam
));
111 return (val
) ? scm_makfromstr(val
, (scm_sizet
)strlen(val
), 0) : SCM_BOOL_F
;
115 /* simple exit, without unwinding the scheme stack or flushing ports. */
116 SCM_DEFINE (scm_primitive_exit
, "primitive-exit", 0, 1, 0,
118 "Terminate the current process without unwinding the Scheme stack.\n"
119 "This is would typically be useful after a fork. The exit status\n"
120 "is @var{status} if supplied, otherwise zero.")
121 #define FUNC_NAME s_scm_primitive_exit
124 if (!SCM_UNBNDP (status
))
126 SCM_VALIDATE_INUM (1,status
);
127 cstatus
= SCM_INUM (status
);
137 #ifndef SCM_MAGIC_SNARFER
138 #include "libguile/simpos.x"