libgfortran/intrinsics/system.c

   1 /* Implementation of the SYSTEM intrinsic.
   2    Copyright (C) 2004, 2007 Free Software Foundation, Inc.
   3    Contributed by Tobias Schlüter.
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 In addition to the permissions in the GNU General Public License, the
  13 Free Software Foundation gives you unlimited permission to link the
  14 compiled version of this file into combinations with other programs,
  15 and to distribute those combinations without any restriction coming
  16 from the use of this file.  (The General Public License restrictions
  17 do apply in other respects; for example, they cover modification of
  18 the file, and distribution when not linked into a combined
  19 executable.)
  20
  21 Libgfortran is distributed in the hope that it will be useful, but WITHOUT
  22 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  23 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  24 for more details.
  25
  26 You should have received a copy of the GNU General Public License
  27 along with libgfortran; see the file COPYING.  If not, write to the Free
  28 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  29 02110-1301, USA.  */
  30
  31 #include "libgfortran.h"
  32 #include <string.h>
  33
  34 #ifdef HAVE_STDLIB_H
  35 #include <stdlib.h>
  36 #endif
  37
  38 extern void system_sub (const char *fcmd, GFC_INTEGER_4 * status,
  39                         gfc_charlen_type cmd_len);
  40 iexport_proto(system_sub);
  41
  42 void
  43 system_sub (const char *fcmd, GFC_INTEGER_4 *status, gfc_charlen_type cmd_len)
  44 {
  45   char cmd[cmd_len + 1];
  46   int stat;
  47
  48   /* Flush all I/O units before executing the command.  */
  49   flush_all_units();
  50
  51   memcpy (cmd, fcmd, cmd_len);
  52   cmd[cmd_len] = '\0';
  53
  54   stat = system (cmd);
  55   if (status)
  56     *status = stat;
  57 }
  58 iexport(system_sub);
  59
  60 extern GFC_INTEGER_4 PREFIX(system) (const char *, gfc_charlen_type);
  61 export_proto_np(PREFIX(system));
  62
  63 GFC_INTEGER_4
  64 PREFIX(system) (const char *fcmd, gfc_charlen_type cmd_len)
  65 {
  66   GFC_INTEGER_4 stat;
  67   system_sub (fcmd, &stat, cmd_len);
  68   return stat;
  69 }