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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [libiberty/] [pex-djgpp.c] - Blame information for rev 227

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Line No. Rev Author Line
1 227 jeremybenn
/* Utilities to execute a program in a subprocess (possibly linked by pipes
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   with other subprocesses), and wait for it.  DJGPP specialization.
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   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005
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   Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB.  If not,
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write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA.  */
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#include "pex-common.h"
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#include <stdio.h>
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#include <errno.h>
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#ifdef NEED_DECLARATION_ERRNO
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extern int errno;
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <process.h>
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/* Use ECHILD if available, otherwise use EINVAL.  */
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#ifdef ECHILD
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#define PWAIT_ERROR ECHILD
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#else
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#define PWAIT_ERROR EINVAL
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#endif
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static int pex_djgpp_open_read (struct pex_obj *, const char *, int);
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static int pex_djgpp_open_write (struct pex_obj *, const char *, int);
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static pid_t pex_djgpp_exec_child (struct pex_obj *, int, const char *,
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                                  char * const *, char * const *,
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                                  int, int, int, int,
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                                  const char **, int *);
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static int pex_djgpp_close (struct pex_obj *, int);
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static pid_t pex_djgpp_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
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                           int, const char **, int *);
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/* The list of functions we pass to the common routines.  */
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const struct pex_funcs funcs =
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{
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  pex_djgpp_open_read,
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  pex_djgpp_open_write,
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  pex_djgpp_exec_child,
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  pex_djgpp_close,
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  pex_djgpp_wait,
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  NULL, /* pipe */
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  NULL, /* fdopenr */
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  NULL, /* fdopenw */
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  NULL  /* cleanup */
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};
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/* Return a newly initialized pex_obj structure.  */
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struct pex_obj *
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pex_init (int flags, const char *pname, const char *tempbase)
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{
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  /* DJGPP does not support pipes.  */
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  flags &= ~ PEX_USE_PIPES;
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  return pex_init_common (flags, pname, tempbase, &funcs);
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}
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/* Open a file for reading.  */
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static int
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pex_djgpp_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED,
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                     const char *name, int binary)
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{
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  return open (name, O_RDONLY | (binary ? O_BINARY : O_TEXT));
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}
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89
/* Open a file for writing.  */
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91
static int
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pex_djgpp_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED,
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                      const char *name, int binary)
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{
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  /* Note that we can't use O_EXCL here because gcc may have already
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     created the temporary file via make_temp_file.  */
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  return open (name,
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               (O_WRONLY | O_CREAT | O_TRUNC
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                | (binary ? O_BINARY : O_TEXT)),
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               S_IRUSR | S_IWUSR);
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}
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/* Close a file.  */
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105
static int
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pex_djgpp_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
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{
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  return close (fd);
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}
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/* Execute a child.  */
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static pid_t
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pex_djgpp_exec_child (struct pex_obj *obj, int flags, const char *executable,
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                      char * const * argv, char * const * env,
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                      int in, int out, int errdes,
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                      int toclose ATTRIBUTE_UNUSED, const char **errmsg,
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                      int *err)
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{
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  int org_in, org_out, org_errdes;
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  int status;
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  int *statuses;
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  org_in = -1;
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  org_out = -1;
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  org_errdes = -1;
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  if (in != STDIN_FILE_NO)
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    {
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      org_in = dup (STDIN_FILE_NO);
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      if (org_in < 0)
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        {
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          *err = errno;
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          *errmsg = "dup";
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          return (pid_t) -1;
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        }
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      if (dup2 (in, STDIN_FILE_NO) < 0)
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        {
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          *err = errno;
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          *errmsg = "dup2";
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          return (pid_t) -1;
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        }
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      if (close (in) < 0)
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        {
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          *err = errno;
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          *errmsg = "close";
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          return (pid_t) -1;
148
        }
149
    }
150
 
151
  if (out != STDOUT_FILE_NO)
152
    {
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      org_out = dup (STDOUT_FILE_NO);
154
      if (org_out < 0)
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        {
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          *err = errno;
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          *errmsg = "dup";
158
          return (pid_t) -1;
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        }
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      if (dup2 (out, STDOUT_FILE_NO) < 0)
161
        {
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          *err = errno;
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          *errmsg = "dup2";
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          return (pid_t) -1;
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        }
166
      if (close (out) < 0)
167
        {
168
          *err = errno;
169
          *errmsg = "close";
170
          return (pid_t) -1;
171
        }
172
    }
173
 
174
  if (errdes != STDERR_FILE_NO
175
      || (flags & PEX_STDERR_TO_STDOUT) != 0)
176
    {
177
      org_errdes = dup (STDERR_FILE_NO);
178
      if (org_errdes < 0)
179
        {
180
          *err = errno;
181
          *errmsg = "dup";
182
          return (pid_t) -1;
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        }
184
      if (dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes,
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                 STDERR_FILE_NO) < 0)
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        {
187
          *err = errno;
188
          *errmsg = "dup2";
189
          return (pid_t) -1;
190
        }
191
      if (errdes != STDERR_FILE_NO)
192
        {
193
          if (close (errdes) < 0)
194
            {
195
              *err = errno;
196
              *errmsg = "close";
197
              return (pid_t) -1;
198
            }
199
        }
200
    }
201
 
202
  if (env)
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    status = (((flags & PEX_SEARCH) != 0 ? spawnvpe : spawnve)
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              (P_WAIT, executable, argv, env));
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  else
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    status = (((flags & PEX_SEARCH) != 0 ? spawnvp : spawnv)
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              (P_WAIT, executable, argv));
208
 
209
  if (status == -1)
210
    {
211
      *err = errno;
212
      *errmsg = ((flags & PEX_SEARCH) != 0) ? "spawnvp" : "spawnv";
213
    }
214
 
215
  if (in != STDIN_FILE_NO)
216
    {
217
      if (dup2 (org_in, STDIN_FILE_NO) < 0)
218
        {
219
          *err = errno;
220
          *errmsg = "dup2";
221
          return (pid_t) -1;
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        }
223
      if (close (org_in) < 0)
224
        {
225
          *err = errno;
226
          *errmsg = "close";
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          return (pid_t) -1;
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        }
229
    }
230
 
231
  if (out != STDOUT_FILE_NO)
232
    {
233
      if (dup2 (org_out, STDOUT_FILE_NO) < 0)
234
        {
235
          *err = errno;
236
          *errmsg = "dup2";
237
          return (pid_t) -1;
238
        }
239
      if (close (org_out) < 0)
240
        {
241
          *err = errno;
242
          *errmsg = "close";
243
          return (pid_t) -1;
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        }
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    }
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  if (errdes != STDERR_FILE_NO
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      || (flags & PEX_STDERR_TO_STDOUT) != 0)
249
    {
250
      if (dup2 (org_errdes, STDERR_FILE_NO) < 0)
251
        {
252
          *err = errno;
253
          *errmsg = "dup2";
254
          return (pid_t) -1;
255
        }
256
      if (close (org_errdes) < 0)
257
        {
258
          *err = errno;
259
          *errmsg = "close";
260
          return (pid_t) -1;
261
        }
262
    }
263
 
264
  /* Save the exit status for later.  When we are called, obj->count
265
     is the number of children which have executed before this
266
     one.  */
267
  statuses = (int *) obj->sysdep;
268
  statuses = XRESIZEVEC (int, statuses, obj->count + 1);
269
  statuses[obj->count] = status;
270
  obj->sysdep = (void *) statuses;
271
 
272
  return (pid_t) obj->count;
273
}
274
 
275
/* Wait for a child process to complete.  Actually the child process
276
   has already completed, and we just need to return the exit
277
   status.  */
278
 
279
static pid_t
280
pex_djgpp_wait (struct pex_obj *obj, pid_t pid, int *status,
281
                struct pex_time *time, int done ATTRIBUTE_UNUSED,
282
                const char **errmsg ATTRIBUTE_UNUSED,
283
                int *err ATTRIBUTE_UNUSED)
284
{
285
  int *statuses;
286
 
287
  if (time != NULL)
288
    memset (time, 0, sizeof *time);
289
 
290
  statuses = (int *) obj->sysdep;
291
  *status = statuses[pid];
292
 
293
  return 0;
294
}

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