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., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #include "pex-common.h"
26 #ifdef NEED_DECLARATION_ERRNO
34 /* Use ECHILD if available, otherwise use EINVAL. */
36 #define PWAIT_ERROR ECHILD
38 #define PWAIT_ERROR EINVAL
41 static int pex_djgpp_open_read (struct pex_obj *, const char *, int);
42 static int pex_djgpp_open_write (struct pex_obj *, const char *, int);
43 static long pex_djgpp_exec_child (struct pex_obj *, int, const char *,
44 char * const *, int, int, int,
45 const char **, int *);
46 static int pex_djgpp_close (struct pex_obj *, int);
47 static int pex_djgpp_wait (struct pex_obj *, long, int *, struct pex_time *,
48 int, const char **, int *);
50 /* The list of functions we pass to the common routines. */
52 const struct pex_funcs funcs =
64 /* Return a newly initialized pex_obj structure. */
67 pex_init (int flags, const char *pname, const char *tempbase)
69 /* DJGPP does not support pipes. */
70 flags &= ~ PEX_USE_PIPES;
71 return pex_init_common (flags, pname, tempbase, funcs);
74 /* Open a file for reading. */
77 pex_djgpp_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED,
78 const char *name, int binary)
80 return open (name, O_RDONLY | (binary ? O_BINARY : O_TEXT));
83 /* Open a file for writing. */
86 pex_djgpp_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED,
87 const char *name, int binary)
89 /* Note that we can't use O_EXCL here because gcc may have already
90 created the temporary file via make_temp_file. */
92 (O_WRONLY | O_CREAT | O_TRUNC
93 | (binary ? O_BINARY : O_TEXT)),
100 pex_djgpp_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd)
105 /* Execute a child. */
108 pex_djgpp_exec_child (struct pex_obj *obj, int flags, const char *executable,
109 char * const * argv, int in, int out, int errdes,
110 const char **errmsg, int *err)
112 int org_in, org_out, org_errdes;
120 if (in != STDIN_FILE_NO)
122 org_in = _dup (STDIN_FILE_NO);
129 if (_dup2 (in, STDIN_FILE_NO) < 0)
143 if (out != STDOUT_FILE_NO)
145 org_out = _dup (STDOUT_FILE_NO);
152 if (_dup2 (out, STDOUT_FILE_NO) < 0)
158 if (_close (out) < 0)
166 if (errdes != STDERR_FILE_NO
167 || (flags & PEX_STDERR_TO_STDOUT) != 0)
171 org_errdes = _dup (STDERR_FILE_NO);
178 if (_dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes,
185 if (errdes != STDERR_FILE_NO)
187 if (_close (errdes) < 0)
196 status = (((flags & PEX_SEARCH) != 0 ? _spawnvp : _spawnv)
197 (P_WAIT, program, (const char **) argv));
202 *errmsg = ((flags & PEX_SEARCH) != 0) ? "_spawnvp" : "_spawnv";
205 if (in != STDIN_FILE_NO)
207 if (_dup2 (org_in, STDIN_FILE_NO) < 0)
213 if (_close (org_in) < 0)
221 if (out != STDOUT_FILE_NO)
223 if (_dup2 (org_out, STDOUT_FILE_NO) < 0)
229 if (_close (org_out) < 0)
237 if (errdes != STDERR_FILE_NO
238 || (flags & PEX_STDERR_TO_STDOUT) != 0)
240 if (_dup2 (org_errdes, STDERR_FILE_NO) < 0)
246 if (_close (org_errdes) < 0)
254 /* Save the exit status for later. When we are called, obj->count
255 is the number of children which have executed before this
257 statuses = (int *) obj->sysdep;
258 statuses = xrealloc (statuses, (obj->count + 1) * sizeof (int));
259 statuses[obj->count] = status;
260 obj->sysdep = (void *) statuses;
265 /* Wait for a child process to complete. Actually the child process
266 has already completed, and we just need to return the exit
270 pex_djgpp_wait (struct pex_obj *obj, long pid, int *status,
271 struct pex_time *time, int done, const char **errmsg,
277 memset (time, 0, sizeof *time);
279 statuses = (int *) obj->sysdep;
280 *status = statuses[pid];