libiberty/pex-mpw.c

   1 /* Utilities to execute a program in a subprocess (possibly linked by pipes
   2    with other subprocesses), and wait for it.  MPW specialization.
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
   4    Free Software Foundation, Inc.
   5
   6 This file is part of the libiberty library.
   7 Libiberty is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU Library General Public
   9 License as published by the Free Software Foundation; either
  10 version 2 of the License, or (at your option) any later version.
  11
  12 Libiberty is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 Library General Public License for more details.
  16
  17 You should have received a copy of the GNU Library General Public
  18 License along with libiberty; see the file COPYING.LIB.  If not,
  19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #include "pex-common.h"
  23
  24 #include <stdio.h>
  25 #ifdef HAVE_STRING_H
  26 #include <string.h>
  27 #endif
  28
  29 /* MPW pexecute doesn't actually run anything; instead, it writes out
  30    script commands that, when run, will do the actual executing.
  31
  32    For example, in GCC's case, GCC will write out several script commands:
  33
  34    cpp ...
  35    cc1 ...
  36    as ...
  37    ld ...
  38
  39    and then exit.  None of the above programs will have run yet.  The task
  40    that called GCC will then execute the script and cause cpp,etc. to run.
  41    The caller must invoke pfinish before calling exit.  This adds
  42    the finishing touches to the generated script.  */
  43
  44 static int first_time = 1;
  45
  46 extern void mpwify_filename PARAMS ((const char *, char *));
  47
  48 int
  49 pexecute (program, argv, this_pname, temp_base, errmsg_fmt, errmsg_arg, flags)
  50      const char *program;
  51      char * const *argv;
  52      const char *this_pname;
  53      const char *temp_base;
  54      char **errmsg_fmt, **errmsg_arg;
  55      int flags;
  56 {
  57   char tmpprogram[255];
  58   char *cp, *tmpname;
  59   int i;
  60
  61   mpwify_filename (program, tmpprogram);
  62   if (first_time)
  63     {
  64       printf ("Set Failed 0\n");
  65       first_time = 0;
  66     }
  67
  68   fputs ("If {Failed} == 0\n", stdout);
  69   /* If being verbose, output a copy of the command.  It should be
  70      accurate enough and escaped enough to be "clickable".  */
  71   if (flags & PEXECUTE_VERBOSE)
  72     {
  73       fputs ("\tEcho ", stdout);
  74       fputc ('\'', stdout);
  75       fputs (tmpprogram, stdout);
  76       fputc ('\'', stdout);
  77       fputc (' ', stdout);
  78       for (i=1; argv[i]; i++)
  79         {
  80           fputc ('\'', stdout);
  81           /* See if we have an argument that needs fixing.  */
  82           if (strchr(argv[i], '/'))
  83             {
  84               tmpname = (char *) xmalloc (256);
  85               mpwify_filename (argv[i], tmpname);
  86               argv[i] = tmpname;
  87             }
  88           for (cp = argv[i]; *cp; cp++)
  89             {
  90               /* Write an Option-d escape char in front of special chars.  */
  91               if (strchr("'+", *cp))
  92                 fputc ('\266', stdout);
  93               fputc (*cp, stdout);
  94             }
  95           fputc ('\'', stdout);
  96           fputc (' ', stdout);
  97         }
  98       fputs ("\n", stdout);
  99     }
 100   fputs ("\t", stdout);
 101   fputs (tmpprogram, stdout);
 102   fputc (' ', stdout);
 103
 104   for (i=1; argv[i]; i++)
 105     {
 106       /* See if we have an argument that needs fixing.  */
 107       if (strchr(argv[i], '/'))
 108         {
 109           tmpname = (char *) xmalloc (256);
 110           mpwify_filename (argv[i], tmpname);
 111           argv[i] = tmpname;
 112         }
 113       if (strchr (argv[i], ' '))
 114         fputc ('\'', stdout);
 115       for (cp = argv[i]; *cp; cp++)
 116         {
 117           /* Write an Option-d escape char in front of special chars.  */
 118           if (strchr("'+", *cp))
 119             fputc ('\266', stdout);
 120           fputc (*cp, stdout);
 121         }
 122       if (strchr (argv[i], ' '))
 123         fputc ('\'', stdout);
 124       fputc (' ', stdout);
 125     }
 126
 127   fputs ("\n", stdout);
 128
 129   /* Output commands that arrange to clean up and exit if a failure occurs.
 130      We have to be careful to collect the status from the program that was
 131      run, rather than some other script command.  Also, we don't exit
 132      immediately, since necessary cleanups are at the end of the script.  */
 133   fputs ("\tSet TmpStatus {Status}\n", stdout);
 134   fputs ("\tIf {TmpStatus} != 0\n", stdout);
 135   fputs ("\t\tSet Failed {TmpStatus}\n", stdout);
 136   fputs ("\tEnd\n", stdout);
 137   fputs ("End\n", stdout);
 138
 139   /* We're just composing a script, can't fail here.  */
 140   return 0;
 141 }
 142
 143 int
 144 pwait (pid, status, flags)
 145      int pid;
 146      int *status;
 147      int flags;
 148 {
 149   *status = 0;
 150   return 0;
 151 }
 152
 153 /* Write out commands that will exit with the correct error code
 154    if something in the script failed.  */
 155
 156 void
 157 pfinish ()
 158 {
 159   printf ("\tExit \"{Failed}\"\n");
 160 }
 161