| 1 | /* Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc. |
| 2 | * |
| 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) |
| 6 | * any later version. |
| 7 | * |
| 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. |
| 12 | * |
| 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 |
| 17 | * |
| 18 | * As a special exception, the Free Software Foundation gives permission |
| 19 | * for additional uses of the text contained in its release of GUILE. |
| 20 | * |
| 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. |
| 26 | * |
| 27 | * This exception does not however invalidate any other reasons why |
| 28 | * the executable file might be covered by the GNU General Public License. |
| 29 | * |
| 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. |
| 37 | * |
| 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. */ |
| 41 | |
| 42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, |
| 43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ |
| 44 | |
| 45 | \f |
| 46 | |
| 47 | #include <errno.h> |
| 48 | |
| 49 | #include "libguile/_scm.h" |
| 50 | |
| 51 | #include "libguile/scmsigs.h" |
| 52 | #include "libguile/strings.h" |
| 53 | |
| 54 | #include "libguile/validate.h" |
| 55 | #include "libguile/simpos.h" |
| 56 | |
| 57 | #ifdef HAVE_STRING_H |
| 58 | #include <string.h> |
| 59 | #endif |
| 60 | #ifdef HAVE_UNISTD_H |
| 61 | #include <unistd.h> |
| 62 | #endif |
| 63 | |
| 64 | \f |
| 65 | extern int system(); |
| 66 | \f |
| 67 | |
| 68 | #ifdef HAVE_SYSTEM |
| 69 | SCM_DEFINE (scm_system, "system", 0, 1, 0, |
| 70 | (SCM cmd), |
| 71 | "Execute @var{cmd} using the operating system's \"command\n" |
| 72 | "processor\". Under Unix this is usually the default shell\n" |
| 73 | "@code{sh}. The value returned is @var{cmd}'s exit status as\n" |
| 74 | "returned by @code{waitpid}, which can be interpreted using the\n" |
| 75 | "functions above.\n" |
| 76 | "\n" |
| 77 | "If @code{system} is called without arguments, return a boolean\n" |
| 78 | "indicating whether the command processor is available.") |
| 79 | #define FUNC_NAME s_scm_system |
| 80 | { |
| 81 | int rv; |
| 82 | |
| 83 | if (SCM_UNBNDP (cmd)) |
| 84 | { |
| 85 | rv = system (NULL); |
| 86 | return SCM_BOOL(rv); |
| 87 | } |
| 88 | SCM_VALIDATE_STRING (1, cmd); |
| 89 | SCM_DEFER_INTS; |
| 90 | errno = 0; |
| 91 | SCM_STRING_COERCE_0TERMINATION_X (cmd); |
| 92 | rv = system (SCM_STRING_CHARS (cmd)); |
| 93 | if (rv == -1 || (rv == 127 && errno != 0)) |
| 94 | SCM_SYSERROR; |
| 95 | SCM_ALLOW_INTS; |
| 96 | return SCM_MAKINUM (rv); |
| 97 | } |
| 98 | #undef FUNC_NAME |
| 99 | #endif /* HAVE_SYSTEM */ |
| 100 | |
| 101 | extern char *getenv(); |
| 102 | SCM_DEFINE (scm_getenv, "getenv", 1, 0, 0, |
| 103 | (SCM nam), |
| 104 | "Looks up the string @var{name} in the current environment. The return\n" |
| 105 | "value is @code{#f} unless a string of the form @code{NAME=VALUE} is\n" |
| 106 | "found, in which case the string @code{VALUE} is returned.") |
| 107 | #define FUNC_NAME s_scm_getenv |
| 108 | { |
| 109 | char *val; |
| 110 | SCM_VALIDATE_STRING (1, nam); |
| 111 | SCM_STRING_COERCE_0TERMINATION_X (nam); |
| 112 | val = getenv (SCM_STRING_CHARS (nam)); |
| 113 | return val ? scm_mem2string (val, strlen (val)) : SCM_BOOL_F; |
| 114 | } |
| 115 | #undef FUNC_NAME |
| 116 | |
| 117 | /* simple exit, without unwinding the scheme stack or flushing ports. */ |
| 118 | SCM_DEFINE (scm_primitive_exit, "primitive-exit", 0, 1, 0, |
| 119 | (SCM status), |
| 120 | "Terminate the current process without unwinding the Scheme stack.\n" |
| 121 | "This is would typically be useful after a fork. The exit status\n" |
| 122 | "is @var{status} if supplied, otherwise zero.") |
| 123 | #define FUNC_NAME s_scm_primitive_exit |
| 124 | { |
| 125 | int cstatus = 0; |
| 126 | if (!SCM_UNBNDP (status)) |
| 127 | { |
| 128 | SCM_VALIDATE_INUM (1,status); |
| 129 | cstatus = SCM_INUM (status); |
| 130 | } |
| 131 | exit (cstatus); |
| 132 | } |
| 133 | #undef FUNC_NAME |
| 134 | |
| 135 | |
| 136 | void |
| 137 | scm_init_simpos () |
| 138 | { |
| 139 | #ifndef SCM_MAGIC_SNARFER |
| 140 | #include "libguile/simpos.x" |
| 141 | #endif |
| 142 | } |
| 143 | |
| 144 | |
| 145 | /* |
| 146 | Local Variables: |
| 147 | c-file-style: "gnu" |
| 148 | End: |
| 149 | */ |