Commit | Line | Data |
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5a17353c DD |
1 | /* Utilities to execute a program in a subprocess (possibly linked by pipes |
2 | with other subprocesses), and wait for it. DJGPP specialization. | |
b109e79a | 3 | Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005 |
5a17353c DD |
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, | |
979c05d3 NC |
19 | write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
5a17353c DD |
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 | |
282d9ec3 ILT |
32 | #include <string.h> |
33 | #include <fcntl.h> | |
34 | #include <unistd.h> | |
35 | #include <sys/stat.h> | |
5a17353c DD |
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 | ||
b109e79a ILT |
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 *); | |
5a17353c | 53 | |
b109e79a | 54 | /* The list of functions we pass to the common routines. */ |
5a17353c | 55 | |
b109e79a | 56 | const struct pex_funcs funcs = |
5a17353c | 57 | { |
b109e79a ILT |
58 | pex_djgpp_open_read, |
59 | pex_djgpp_open_write, | |
60 | pex_djgpp_exec_child, | |
61 | pex_djgpp_close, | |
62 | pex_djgpp_wait, | |
63 | NULL, /* pipe */ | |
64 | NULL, /* fdopenr */ | |
3db2e6dd | 65 | NULL, /* fdopenw */ |
b109e79a ILT |
66 | NULL /* cleanup */ |
67 | }; | |
5a17353c | 68 | |
b109e79a | 69 | /* Return a newly initialized pex_obj structure. */ |
5a17353c | 70 | |
b109e79a ILT |
71 | struct pex_obj * |
72 | pex_init (int flags, const char *pname, const char *tempbase) | |
73 | { | |
74 | /* DJGPP does not support pipes. */ | |
75 | flags &= ~ PEX_USE_PIPES; | |
282d9ec3 | 76 | return pex_init_common (flags, pname, tempbase, &funcs); |
b109e79a | 77 | } |
5a17353c | 78 | |
b109e79a | 79 | /* Open a file for reading. */ |
5a17353c | 80 | |
b109e79a ILT |
81 | static int |
82 | pex_djgpp_open_read (struct pex_obj *obj ATTRIBUTE_UNUSED, | |
83 | const char *name, int binary) | |
84 | { | |
85 | return open (name, O_RDONLY | (binary ? O_BINARY : O_TEXT)); | |
86 | } | |
87 | ||
88 | /* Open a file for writing. */ | |
89 | ||
90 | static int | |
91 | pex_djgpp_open_write (struct pex_obj *obj ATTRIBUTE_UNUSED, | |
92 | const char *name, int binary) | |
93 | { | |
94 | /* Note that we can't use O_EXCL here because gcc may have already | |
95 | created the temporary file via make_temp_file. */ | |
96 | return open (name, | |
97 | (O_WRONLY | O_CREAT | O_TRUNC | |
98 | | (binary ? O_BINARY : O_TEXT)), | |
99 | S_IRUSR | S_IWUSR); | |
100 | } | |
101 | ||
102 | /* Close a file. */ | |
5a17353c | 103 | |
b109e79a ILT |
104 | static int |
105 | pex_djgpp_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd) | |
106 | { | |
107 | return close (fd); | |
5a17353c DD |
108 | } |
109 | ||
b109e79a ILT |
110 | /* Execute a child. */ |
111 | ||
112 | static long | |
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) | |
5a17353c | 116 | { |
b109e79a ILT |
117 | int org_in, org_out, org_errdes; |
118 | int status; | |
119 | int *statuses; | |
120 | ||
121 | org_in = -1; | |
122 | org_out = -1; | |
123 | org_errdes = -1; | |
124 | ||
125 | if (in != STDIN_FILE_NO) | |
126 | { | |
282d9ec3 | 127 | org_in = dup (STDIN_FILE_NO); |
b109e79a ILT |
128 | if (org_in < 0) |
129 | { | |
130 | *err = errno; | |
282d9ec3 | 131 | *errmsg = "dup"; |
b109e79a ILT |
132 | return -1; |
133 | } | |
282d9ec3 | 134 | if (dup2 (in, STDIN_FILE_NO) < 0) |
b109e79a ILT |
135 | { |
136 | *err = errno; | |
282d9ec3 | 137 | *errmsg = "dup2"; |
b109e79a ILT |
138 | return -1; |
139 | } | |
282d9ec3 | 140 | if (close (in) < 0) |
b109e79a ILT |
141 | { |
142 | *err = errno; | |
282d9ec3 | 143 | *errmsg = "close"; |
b109e79a ILT |
144 | return -1; |
145 | } | |
146 | } | |
147 | ||
148 | if (out != STDOUT_FILE_NO) | |
149 | { | |
282d9ec3 | 150 | org_out = dup (STDOUT_FILE_NO); |
b109e79a ILT |
151 | if (org_out < 0) |
152 | { | |
153 | *err = errno; | |
282d9ec3 | 154 | *errmsg = "dup"; |
b109e79a ILT |
155 | return -1; |
156 | } | |
282d9ec3 | 157 | if (dup2 (out, STDOUT_FILE_NO) < 0) |
b109e79a ILT |
158 | { |
159 | *err = errno; | |
282d9ec3 | 160 | *errmsg = "dup2"; |
b109e79a ILT |
161 | return -1; |
162 | } | |
282d9ec3 | 163 | if (close (out) < 0) |
b109e79a ILT |
164 | { |
165 | *err = errno; | |
282d9ec3 | 166 | *errmsg = "close"; |
b109e79a ILT |
167 | return -1; |
168 | } | |
169 | } | |
170 | ||
171 | if (errdes != STDERR_FILE_NO | |
172 | || (flags & PEX_STDERR_TO_STDOUT) != 0) | |
173 | { | |
282d9ec3 | 174 | org_errdes = dup (STDERR_FILE_NO); |
b109e79a ILT |
175 | if (org_errdes < 0) |
176 | { | |
177 | *err = errno; | |
282d9ec3 | 178 | *errmsg = "dup"; |
b109e79a ILT |
179 | return -1; |
180 | } | |
282d9ec3 | 181 | if (dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes, |
b109e79a ILT |
182 | STDERR_FILE_NO) < 0) |
183 | { | |
184 | *err = errno; | |
282d9ec3 | 185 | *errmsg = "dup2"; |
b109e79a ILT |
186 | return -1; |
187 | } | |
188 | if (errdes != STDERR_FILE_NO) | |
189 | { | |
282d9ec3 | 190 | if (close (errdes) < 0) |
b109e79a ILT |
191 | { |
192 | *err = errno; | |
282d9ec3 | 193 | *errmsg = "close"; |
b109e79a ILT |
194 | return -1; |
195 | } | |
196 | } | |
197 | } | |
198 | ||
282d9ec3 ILT |
199 | status = (((flags & PEX_SEARCH) != 0 ? spawnvp : spawnv) |
200 | (P_WAIT, executable, (char * const *) argv)); | |
b109e79a ILT |
201 | |
202 | if (status == -1) | |
203 | { | |
204 | *err = errno; | |
282d9ec3 | 205 | *errmsg = ((flags & PEX_SEARCH) != 0) ? "spawnvp" : "spawnv"; |
b109e79a ILT |
206 | } |
207 | ||
208 | if (in != STDIN_FILE_NO) | |
209 | { | |
282d9ec3 | 210 | if (dup2 (org_in, STDIN_FILE_NO) < 0) |
b109e79a ILT |
211 | { |
212 | *err = errno; | |
282d9ec3 | 213 | *errmsg = "dup2"; |
b109e79a ILT |
214 | return -1; |
215 | } | |
282d9ec3 | 216 | if (close (org_in) < 0) |
b109e79a ILT |
217 | { |
218 | *err = errno; | |
282d9ec3 | 219 | *errmsg = "close"; |
b109e79a ILT |
220 | return -1; |
221 | } | |
222 | } | |
223 | ||
224 | if (out != STDOUT_FILE_NO) | |
225 | { | |
282d9ec3 | 226 | if (dup2 (org_out, STDOUT_FILE_NO) < 0) |
b109e79a ILT |
227 | { |
228 | *err = errno; | |
282d9ec3 | 229 | *errmsg = "dup2"; |
b109e79a ILT |
230 | return -1; |
231 | } | |
282d9ec3 | 232 | if (close (org_out) < 0) |
b109e79a ILT |
233 | { |
234 | *err = errno; | |
282d9ec3 | 235 | *errmsg = "close"; |
b109e79a ILT |
236 | return -1; |
237 | } | |
238 | } | |
239 | ||
240 | if (errdes != STDERR_FILE_NO | |
241 | || (flags & PEX_STDERR_TO_STDOUT) != 0) | |
5a17353c | 242 | { |
282d9ec3 | 243 | if (dup2 (org_errdes, STDERR_FILE_NO) < 0) |
b109e79a ILT |
244 | { |
245 | *err = errno; | |
282d9ec3 | 246 | *errmsg = "dup2"; |
b109e79a ILT |
247 | return -1; |
248 | } | |
282d9ec3 | 249 | if (close (org_errdes) < 0) |
b109e79a ILT |
250 | { |
251 | *err = errno; | |
282d9ec3 | 252 | *errmsg = "close"; |
b109e79a ILT |
253 | return -1; |
254 | } | |
5a17353c | 255 | } |
b109e79a ILT |
256 | |
257 | /* Save the exit status for later. When we are called, obj->count | |
258 | is the number of children which have executed before this | |
259 | one. */ | |
260 | statuses = (int *) obj->sysdep; | |
abf6a75b | 261 | statuses = XRESIZEVEC (int, statuses, obj->count + 1); |
b109e79a ILT |
262 | statuses[obj->count] = status; |
263 | obj->sysdep = (void *) statuses; | |
264 | ||
265 | return obj->count; | |
266 | } | |
267 | ||
268 | /* Wait for a child process to complete. Actually the child process | |
269 | has already completed, and we just need to return the exit | |
270 | status. */ | |
271 | ||
272 | static int | |
273 | pex_djgpp_wait (struct pex_obj *obj, long pid, int *status, | |
282d9ec3 ILT |
274 | struct pex_time *time, int done ATTRIBUTE_UNUSED, |
275 | const char **errmsg ATTRIBUTE_UNUSED, | |
276 | int *err ATTRIBUTE_UNUSED) | |
b109e79a ILT |
277 | { |
278 | int *statuses; | |
279 | ||
280 | if (time != NULL) | |
281 | memset (time, 0, sizeof *time); | |
282 | ||
283 | statuses = (int *) obj->sysdep; | |
284 | *status = statuses[pid]; | |
285 | ||
286 | return 0; | |
5a17353c | 287 | } |