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[/] [scarts/] [trunk/] [toolchain/] [scarts-binutils/] [binutils-2.19.1/] [libiberty/] [pex-djgpp.c] - Blame information for rev 13

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1 6 jlechner 
/* Utilities to execute a program in a subprocess (possibly linked by pipes
2 
   with other subprocesses), and wait for it.  DJGPP specialization.
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   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005
4 
   Free Software Foundation, Inc.
5 
 
6 
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.
11 
 
12 
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
15 
Library General Public License for more details.
16 
 
17 
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.  */
21 
 
22 
#include "pex-common.h"
23 
 
24 
#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>
31 
#endif
32 
#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>
37 
 
38 
/* 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
44 
 
45 
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 int pex_djgpp_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
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                           int, const char **, int *);
54 
 
55 
/* The list of functions we pass to the common routines.  */
56 
 
57 
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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};
69 
 
70 
/* Return a newly initialized pex_obj structure.  */
71 
 
72 
struct pex_obj *
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pex_init (int flags, const char *pname, const char *tempbase)
74 
{
75 
  /* 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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}
79 
 
80 
/* Open a file for reading.  */
81 
 
82 
static int
83 
pex_djgpp_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED,
84 
                     const char *name, int binary)
85 
{
86 
  return open (name, O_RDONLY | (binary ? O_BINARY : O_TEXT));
87 
}
88 
 
89 
/* Open a file for writing.  */
90 
 
91 
static int
92 
pex_djgpp_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED,
93 
                      const char *name, int binary)
94 
{
95 
  /* Note that we can't use O_EXCL here because gcc may have already
96 
     created the temporary file via make_temp_file.  */
97 
  return open (name,
98 
               (O_WRONLY | O_CREAT | O_TRUNC
99 
                | (binary ? O_BINARY : O_TEXT)),
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               S_IRUSR | S_IWUSR);
101 
}
102 
 
103 
/* Close a file.  */
104 
 
105 
static int
106 
pex_djgpp_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
107 
{
108 
  return close (fd);
109 
}
110 
 
111 
/* Execute a child.  */
112 
 
113 
static pid_t
114 
pex_djgpp_exec_child (struct pex_obj *obj, int flags, const char *executable,
115 
                      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,
118 
                      int *err)
119 
{
120 
  int org_in, org_out, org_errdes;
121 
  int status;
122 
  int *statuses;
123 
 
124 
  org_in = -1;
125 
  org_out = -1;
126 
  org_errdes = -1;
127 
 
128 
  if (in != STDIN_FILE_NO)
129 
    {
130 
      org_in = dup (STDIN_FILE_NO);
131 
      if (org_in < 0)
132 
        {
133 
          *err = errno;
134 
          *errmsg = "dup";
135 
          return (pid_t) -1;
136 
        }
137 
      if (dup2 (in, STDIN_FILE_NO) < 0)
138 
        {
139 
          *err = errno;
140 
          *errmsg = "dup2";
141 
          return (pid_t) -1;
142 
        }
143 
      if (close (in) < 0)
144 
        {
145 
          *err = errno;
146 
          *errmsg = "close";
147 
          return (pid_t) -1;
148 
        }
149 
    }
150 
 
151 
  if (out != STDOUT_FILE_NO)
152 
    {
153 
      org_out = dup (STDOUT_FILE_NO);
154 
      if (org_out < 0)
155 
        {
156 
          *err = errno;
157 
          *errmsg = "dup";
158 
          return (pid_t) -1;
159 
        }
160 
      if (dup2 (out, STDOUT_FILE_NO) < 0)
161 
        {
162 
          *err = errno;
163 
          *errmsg = "dup2";
164 
          return (pid_t) -1;
165 
        }
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;
183 
        }
184 
      if (dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes,
185 
                 STDERR_FILE_NO) < 0)
186 
        {
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)
203 
    status = (((flags & PEX_SEARCH) != 0 ? spawnvpe : spawnve)
204 
              (P_WAIT, executable, argv, env));
205 
  else
206 
    status = (((flags & PEX_SEARCH) != 0 ? spawnvp : spawnv)
207 
              (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;
222 
        }
223 
      if (close (org_in) < 0)
224 
        {
225 
          *err = errno;
226 
          *errmsg = "close";
227 
          return (pid_t) -1;
228 
        }
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;
244 
        }
245 
    }
246 
 
247 
  if (errdes != STDERR_FILE_NO
248 
      || (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 int
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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