1 /* 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.
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.
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.
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. */
22 #include "pex-common.h"
26 #ifdef NEED_DECLARATION_ERRNO
38 /* Use ECHILD if available, otherwise use EINVAL. */
40 #define PWAIT_ERROR ECHILD
42 #define PWAIT_ERROR EINVAL
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 long pex_djgpp_exec_child (struct pex_obj *, int, const char *,
48 char * const *, int, int, int,
49 const char **, int *);
50 static int pex_djgpp_close (struct pex_obj *, int);
51 static int pex_djgpp_wait (struct pex_obj *, long, int *, struct pex_time *,
52 int, const char **, int *);
54 /* The list of functions we pass to the common routines. */
56 const struct pex_funcs funcs =
69 /* Return a newly initialized pex_obj structure. */
72 pex_init (int flags, const char *pname, const char *tempbase)
74 /* DJGPP does not support pipes. */
75 flags &= ~ PEX_USE_PIPES;
76 return pex_init_common (flags, pname, tempbase, &funcs);
79 /* Open a file for reading. */
82 pex_djgpp_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED,
83 const char *name, int binary)
85 return open (name, O_RDONLY | (binary ? O_BINARY : O_TEXT));
88 /* Open a file for writing. */
91 pex_djgpp_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED,
92 const char *name, int binary)
94 /* Note that we can't use O_EXCL here because gcc may have already
95 created the temporary file via make_temp_file. */
97 (O_WRONLY | O_CREAT | O_TRUNC
98 | (binary ? O_BINARY : O_TEXT)),
105 pex_djgpp_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
110 /* Execute a child. */
113 pex_djgpp_exec_child (struct pex_obj *obj, int flags, const char *executable,
114 char * const * argv, int in, int out, int errdes,
115 const char **errmsg, int *err)
117 int org_in, org_out, org_errdes;
125 if (in != STDIN_FILE_NO)
127 org_in = dup (STDIN_FILE_NO);
134 if (dup2 (in, STDIN_FILE_NO) < 0)
148 if (out != STDOUT_FILE_NO)
150 org_out = dup (STDOUT_FILE_NO);
157 if (dup2 (out, STDOUT_FILE_NO) < 0)
171 if (errdes != STDERR_FILE_NO
172 || (flags & PEX_STDERR_TO_STDOUT) != 0)
174 org_errdes = dup (STDERR_FILE_NO);
181 if (dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes,
188 if (errdes != STDERR_FILE_NO)
190 if (close (errdes) < 0)
199 status = (((flags & PEX_SEARCH) != 0 ? spawnvp : spawnv)
200 (P_WAIT, executable, (char * const *) argv));
205 *errmsg = ((flags & PEX_SEARCH) != 0) ? "spawnvp" : "spawnv";
208 if (in != STDIN_FILE_NO)
210 if (dup2 (org_in, STDIN_FILE_NO) < 0)
216 if (close (org_in) < 0)
224 if (out != STDOUT_FILE_NO)
226 if (dup2 (org_out, STDOUT_FILE_NO) < 0)
232 if (close (org_out) < 0)
240 if (errdes != STDERR_FILE_NO
241 || (flags & PEX_STDERR_TO_STDOUT) != 0)
243 if (dup2 (org_errdes, STDERR_FILE_NO) < 0)
249 if (close (org_errdes) < 0)
257 /* Save the exit status for later. When we are called, obj->count
258 is the number of children which have executed before this
260 statuses = (int *) obj->sysdep;
261 statuses = XRESIZEVEC (int, statuses, obj->count + 1);
262 statuses[obj->count] = status;
263 obj->sysdep = (void *) statuses;
268 /* Wait for a child process to complete. Actually the child process
269 has already completed, and we just need to return the exit
273 pex_djgpp_wait (struct pex_obj *obj, long pid, int *status,
274 struct pex_time *time, int done ATTRIBUTE_UNUSED,
275 const char **errmsg ATTRIBUTE_UNUSED,
276 int *err ATTRIBUTE_UNUSED)
281 memset (time, 0, sizeof *time);
283 statuses = (int *) obj->sysdep;
284 *status = statuses[pid];