File: pex-djgpp.c

package info (click to toggle)
gdb 8.2.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 223,696 kB
  • sloc: ansic: 1,936,156; asm: 341,757; exp: 146,606; makefile: 56,749; sh: 23,776; cpp: 20,830; yacc: 12,914; perl: 5,331; ada: 4,977; python: 4,617; xml: 4,176; pascal: 3,134; lisp: 1,527; cs: 879; lex: 620; f90: 479; sed: 228; awk: 140; objc: 134; fortran: 43
file content (295 lines) | stat: -rw-r--r-- 6,854 bytes parent folder | download | duplicates (11)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
/* Utilities to execute a program in a subprocess (possibly linked by pipes
   with other subprocesses), and wait for it.  DJGPP specialization.
   Copyright (C) 1996-2018 Free Software Foundation, Inc.

This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB.  If not,
write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA.  */

#include "pex-common.h"

#include <stdio.h>
#include <errno.h>
#ifdef NEED_DECLARATION_ERRNO
extern int errno;
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <process.h>

/* Use ECHILD if available, otherwise use EINVAL.  */
#ifdef ECHILD
#define PWAIT_ERROR ECHILD
#else
#define PWAIT_ERROR EINVAL
#endif

static int pex_djgpp_open_read (struct pex_obj *, const char *, int);
static int pex_djgpp_open_write (struct pex_obj *, const char *, int, int);
static pid_t pex_djgpp_exec_child (struct pex_obj *, int, const char *,
				  char * const *, char * const *,
				  int, int, int, int,
				  const char **, int *);
static int pex_djgpp_close (struct pex_obj *, int);
static pid_t pex_djgpp_wait (struct pex_obj *, pid_t, int *, struct pex_time *,
			   int, const char **, int *);

/* The list of functions we pass to the common routines.  */

const struct pex_funcs funcs =
{
  pex_djgpp_open_read,
  pex_djgpp_open_write,
  pex_djgpp_exec_child,
  pex_djgpp_close,
  pex_djgpp_wait,
  NULL, /* pipe */
  NULL, /* fdopenr */
  NULL, /* fdopenw */
  NULL  /* cleanup */
};

/* Return a newly initialized pex_obj structure.  */

struct pex_obj *
pex_init (int flags, const char *pname, const char *tempbase)
{
  /* DJGPP does not support pipes.  */
  flags &= ~ PEX_USE_PIPES;
  return pex_init_common (flags, pname, tempbase, &funcs);
}

/* Open a file for reading.  */

static int
pex_djgpp_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED,
		     const char *name, int binary)
{
  return open (name, O_RDONLY | (binary ? O_BINARY : O_TEXT));
}

/* Open a file for writing.  */

static int
pex_djgpp_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED,
		      const char *name, int binary, int append)
{
  /* Note that we can't use O_EXCL here because gcc may have already
     created the temporary file via make_temp_file.  */
  if (append)
    return -1;
  return open (name,
	       (O_WRONLY | O_CREAT | O_TRUNC
		| (binary ? O_BINARY : O_TEXT)),
	       S_IRUSR | S_IWUSR);
}

/* Close a file.  */

static int
pex_djgpp_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
{
  return close (fd);
}

/* Execute a child.  */

static pid_t
pex_djgpp_exec_child (struct pex_obj *obj, int flags, const char *executable,
		      char * const * argv, char * const * env,
                      int in, int out, int errdes,
		      int toclose ATTRIBUTE_UNUSED, const char **errmsg,
		      int *err)
{
  int org_in, org_out, org_errdes;
  int status;
  int *statuses;

  org_in = -1;
  org_out = -1;
  org_errdes = -1;

  if (in != STDIN_FILE_NO)
    {
      org_in = dup (STDIN_FILE_NO);
      if (org_in < 0)
	{
	  *err = errno;
	  *errmsg = "dup";
	  return (pid_t) -1;
	}
      if (dup2 (in, STDIN_FILE_NO) < 0)
	{
	  *err = errno;
	  *errmsg = "dup2";
	  return (pid_t) -1;
	}
      if (close (in) < 0)
	{
	  *err = errno;
	  *errmsg = "close";
	  return (pid_t) -1;
	}
    }

  if (out != STDOUT_FILE_NO)
    {
      org_out = dup (STDOUT_FILE_NO);
      if (org_out < 0)
	{
	  *err = errno;
	  *errmsg = "dup";
	  return (pid_t) -1;
	}
      if (dup2 (out, STDOUT_FILE_NO) < 0)
	{
	  *err = errno;
	  *errmsg = "dup2";
	  return (pid_t) -1;
	}
      if (close (out) < 0)
	{
	  *err = errno;
	  *errmsg = "close";
	  return (pid_t) -1;
	}
    }

  if (errdes != STDERR_FILE_NO
      || (flags & PEX_STDERR_TO_STDOUT) != 0)
    {
      org_errdes = dup (STDERR_FILE_NO);
      if (org_errdes < 0)
	{
	  *err = errno;
	  *errmsg = "dup";
	  return (pid_t) -1;
	}
      if (dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes,
		 STDERR_FILE_NO) < 0)
	{
	  *err = errno;
	  *errmsg = "dup2";
	  return (pid_t) -1;
	}
      if (errdes != STDERR_FILE_NO)
	{
	  if (close (errdes) < 0)
	    {
	      *err = errno;
	      *errmsg = "close";
	      return (pid_t) -1;
	    }
	}
    }

  if (env)
    status = (((flags & PEX_SEARCH) != 0 ? spawnvpe : spawnve)
	      (P_WAIT, executable, argv, env));
  else
    status = (((flags & PEX_SEARCH) != 0 ? spawnvp : spawnv)
  	      (P_WAIT, executable, argv));

  if (status == -1)
    {
      *err = errno;
      *errmsg = ((flags & PEX_SEARCH) != 0) ? "spawnvp" : "spawnv";
    }

  if (in != STDIN_FILE_NO)
    {
      if (dup2 (org_in, STDIN_FILE_NO) < 0)
	{
	  *err = errno;
	  *errmsg = "dup2";
	  return (pid_t) -1;
	}
      if (close (org_in) < 0)
	{
	  *err = errno;
	  *errmsg = "close";
	  return (pid_t) -1;
	}
    }

  if (out != STDOUT_FILE_NO)
    {
      if (dup2 (org_out, STDOUT_FILE_NO) < 0)
	{
	  *err = errno;
	  *errmsg = "dup2";
	  return (pid_t) -1;
	}
      if (close (org_out) < 0)
	{
	  *err = errno;
	  *errmsg = "close";
	  return (pid_t) -1;
	}
    }

  if (errdes != STDERR_FILE_NO
      || (flags & PEX_STDERR_TO_STDOUT) != 0)
    {
      if (dup2 (org_errdes, STDERR_FILE_NO) < 0)
	{
	  *err = errno;
	  *errmsg = "dup2";
	  return (pid_t) -1;
	}
      if (close (org_errdes) < 0)
	{
	  *err = errno;
	  *errmsg = "close";
	  return (pid_t) -1;
	}
    }

  /* Save the exit status for later.  When we are called, obj->count
     is the number of children which have executed before this
     one.  */
  statuses = (int *) obj->sysdep;
  statuses = XRESIZEVEC (int, statuses, obj->count + 1);
  statuses[obj->count] = status;
  obj->sysdep = (void *) statuses;

  return (pid_t) obj->count;
}

/* Wait for a child process to complete.  Actually the child process
   has already completed, and we just need to return the exit
   status.  */

static pid_t
pex_djgpp_wait (struct pex_obj *obj, pid_t pid, int *status,
		struct pex_time *time, int done ATTRIBUTE_UNUSED,
		const char **errmsg ATTRIBUTE_UNUSED,
		int *err ATTRIBUTE_UNUSED)
{
  int *statuses;

  if (time != NULL)
    memset (time, 0, sizeof *time);

  statuses = (int *) obj->sysdep;
  *status = statuses[pid];

  return 0;
}