libguile/simpos.c

   1 /*      Copyright (C) 1995,1996,1997,1998 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 \f
  42
  43 #include <stdio.h>
  44 #include "_scm.h"
  45
  46 #include "scmsigs.h"
  47 #include "simpos.h"
  48
  49 #ifdef HAVE_STRING_H
  50 #include <string.h>
  51 #endif
  52 #ifdef HAVE_UNISTD_H
  53 #include <unistd.h>
  54 #endif
  55
  56 \f
  57 extern int system();
  58 \f
  59
  60 SCM_PROC(s_system, "system", 0, 1, 0, scm_system);
  61
  62 SCM
  63 scm_system(cmd)
  64      SCM cmd;
  65 {
  66   int rv;
  67
  68   if (SCM_UNBNDP (cmd))
  69     {
  70 #ifdef HAVE_SYSTEM
  71       rv = system (NULL);
  72 #else
  73       rv = 0;
  74 #endif
  75       return rv ? SCM_BOOL_T : SCM_BOOL_F;
  76     }
  77   SCM_ASSERT(SCM_NIMP(cmd) && SCM_ROSTRINGP(cmd), cmd, SCM_ARG1, s_system);
  78 #ifdef HAVE_SYSTEM
  79   SCM_DEFER_INTS;
  80   errno = 0;
  81   if (SCM_ROSTRINGP (cmd))
  82     cmd = scm_makfromstr (SCM_ROCHARS (cmd), SCM_ROLENGTH (cmd), 0);
  83   rv = system(SCM_ROCHARS(cmd));
  84   if (rv == -1 || (rv == 127 && errno != 0))
  85     scm_syserror (s_system);
  86   SCM_ALLOW_INTS;
  87   return SCM_MAKINUM (rv);
  88 #else
  89   scm_sysmissing (s_system);
  90 #endif
  91 }
  92
  93 extern char *getenv();
  94 SCM_PROC (s_getenv, "getenv", 1, 0, 0, scm_getenv);
  95
  96 SCM
  97 scm_getenv(nam)
  98      SCM nam;
  99 {
 100   char *val;
 101   SCM_ASSERT(SCM_NIMP(nam) && SCM_ROSTRINGP(nam), nam, SCM_ARG1, s_getenv);
 102   if (SCM_ROSTRINGP (nam))
 103     nam = scm_makfromstr (SCM_ROCHARS (nam), SCM_ROLENGTH (nam), 0);
 104   val = getenv(SCM_CHARS(nam));
 105   return (val) ? scm_makfromstr(val, (scm_sizet)strlen(val), 0) : SCM_BOOL_F;
 106 }
 107
 108 SCM_PROC (s_primitive_exit, "primitive-exit", 0, 1, 0, scm_primitive_exit);
 109 SCM
 110 scm_primitive_exit (SCM status)
 111 {
 112   int cstatus = 0;
 113   if (!SCM_UNBNDP (status))
 114     {
 115       SCM_ASSERT (SCM_INUMP (status), status, SCM_ARG1, s_primitive_exit);
 116       cstatus = SCM_INUM (status);
 117     }
 118   exit (cstatus);
 119 }
 120
 121
 122 void
 123 scm_init_simpos ()
 124 {
 125 #include "simpos.x"
 126 }
 127