Mercurial > hg > CbC > CbC_gcc

comparison libiberty/pex-djgpp.c @ 0:a06113de4d67

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
parents
children 77e2b8dfacca
comparison
equal deleted inserted replaced
-1:000000000000 0:a06113de4d67
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.
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 int 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 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 }