OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libiberty/] [pex-djgpp.c] - Blame information for rev 280

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 274 jeremybenn
/* Utilities to execute a program in a subprocess (possibly linked by pipes
2
   with other subprocesses), and wait for it.  DJGPP specialization.
3
   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.
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., 51 Franklin Street - Fifth Floor,
20
Boston, MA 02110-1301, USA.  */
21
 
22
#include "pex-common.h"
23
 
24
#include <stdio.h>
25
#include <errno.h>
26
#ifdef NEED_DECLARATION_ERRNO
27
extern int errno;
28
#endif
29
#ifdef HAVE_STDLIB_H
30
#include <stdlib.h>
31
#endif
32
#include <string.h>
33
#include <fcntl.h>
34
#include <unistd.h>
35
#include <sys/stat.h>
36
#include <process.h>
37
 
38
/* Use ECHILD if available, otherwise use EINVAL.  */
39
#ifdef ECHILD
40
#define PWAIT_ERROR ECHILD
41
#else
42
#define PWAIT_ERROR EINVAL
43
#endif
44
 
45
static int pex_djgpp_open_read (struct pex_obj *, const char *, int);
46
static int pex_djgpp_open_write (struct pex_obj *, const char *, int);
47
static pid_t pex_djgpp_exec_child (struct pex_obj *, int, const char *,
48
                                  char * const *, char * const *,
49
                                  int, int, int, int,
50
                                  const char **, int *);
51
static int pex_djgpp_close (struct pex_obj *, int);
52
static pid_t pex_djgpp_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
53
                           int, const char **, int *);
54
 
55
/* The list of functions we pass to the common routines.  */
56
 
57
const struct pex_funcs funcs =
58
{
59
  pex_djgpp_open_read,
60
  pex_djgpp_open_write,
61
  pex_djgpp_exec_child,
62
  pex_djgpp_close,
63
  pex_djgpp_wait,
64
  NULL, /* pipe */
65
  NULL, /* fdopenr */
66
  NULL, /* fdopenw */
67
  NULL  /* cleanup */
68
};
69
 
70
/* Return a newly initialized pex_obj structure.  */
71
 
72
struct pex_obj *
73
pex_init (int flags, const char *pname, const char *tempbase)
74
{
75
  /* DJGPP does not support pipes.  */
76
  flags &= ~ PEX_USE_PIPES;
77
  return pex_init_common (flags, pname, tempbase, &funcs);
78
}
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)),
100
               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,
116
                      int in, int out, int errdes,
117
                      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 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
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.