Commit | Line | Data |
---|---|---|
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. | |
e495212d | 3 | Copyright (C) 1996-2017 Free Software Foundation, Inc. |
5a17353c DD |
4 | |
5 | This file is part of the libiberty library. | |
6 | Libiberty is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Library General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2 of the License, or (at your option) any later version. | |
10 | ||
11 | Libiberty is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Library General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Library General Public | |
17 | License along with libiberty; see the file COPYING.LIB. If not, | |
979c05d3 NC |
18 | write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
19 | Boston, MA 02110-1301, USA. */ | |
5a17353c DD |
20 | |
21 | #include "pex-common.h" | |
22 | ||
23 | #include <stdio.h> | |
24 | #include <errno.h> | |
25 | #ifdef NEED_DECLARATION_ERRNO | |
26 | extern int errno; | |
27 | #endif | |
28 | #ifdef HAVE_STDLIB_H | |
29 | #include <stdlib.h> | |
30 | #endif | |
282d9ec3 ILT |
31 | #include <string.h> |
32 | #include <fcntl.h> | |
33 | #include <unistd.h> | |
34 | #include <sys/stat.h> | |
5a17353c DD |
35 | #include <process.h> |
36 | ||
37 | /* Use ECHILD if available, otherwise use EINVAL. */ | |
38 | #ifdef ECHILD | |
39 | #define PWAIT_ERROR ECHILD | |
40 | #else | |
41 | #define PWAIT_ERROR EINVAL | |
42 | #endif | |
43 | ||
b109e79a | 44 | static int pex_djgpp_open_read (struct pex_obj *, const char *, int); |
b55f9678 | 45 | static int pex_djgpp_open_write (struct pex_obj *, const char *, int, int); |
29d89e07 | 46 | static pid_t pex_djgpp_exec_child (struct pex_obj *, int, const char *, |
014a8caf | 47 | char * const *, char * const *, |
cb6c09ac | 48 | int, int, int, int, |
b109e79a ILT |
49 | const char **, int *); |
50 | static int pex_djgpp_close (struct pex_obj *, int); | |
587c6b96 | 51 | static pid_t pex_djgpp_wait (struct pex_obj *, pid_t, int *, struct pex_time *, |
b109e79a | 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, | |
b55f9678 | 92 | const char *name, int binary, int append) |
b109e79a ILT |
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. */ | |
b55f9678 IB |
96 | if (append) |
97 | return -1; | |
b109e79a ILT |
98 | return open (name, |
99 | (O_WRONLY | O_CREAT | O_TRUNC | |
100 | | (binary ? O_BINARY : O_TEXT)), | |
101 | S_IRUSR | S_IWUSR); | |
102 | } | |
103 | ||
104 | /* Close a file. */ | |
5a17353c | 105 | |
b109e79a ILT |
106 | static int |
107 | pex_djgpp_close (struct pex_obj *obj ATTRIBUTE_UNUSED, int fd) | |
108 | { | |
109 | return close (fd); | |
5a17353c DD |
110 | } |
111 | ||
b109e79a ILT |
112 | /* Execute a child. */ |
113 | ||
29d89e07 | 114 | static pid_t |
b109e79a | 115 | pex_djgpp_exec_child (struct pex_obj *obj, int flags, const char *executable, |
014a8caf DD |
116 | char * const * argv, char * const * env, |
117 | int in, int out, int errdes, | |
cb6c09ac DD |
118 | int toclose ATTRIBUTE_UNUSED, const char **errmsg, |
119 | int *err) | |
5a17353c | 120 | { |
b109e79a ILT |
121 | int org_in, org_out, org_errdes; |
122 | int status; | |
123 | int *statuses; | |
124 | ||
125 | org_in = -1; | |
126 | org_out = -1; | |
127 | org_errdes = -1; | |
128 | ||
129 | if (in != STDIN_FILE_NO) | |
130 | { | |
282d9ec3 | 131 | org_in = dup (STDIN_FILE_NO); |
b109e79a ILT |
132 | if (org_in < 0) |
133 | { | |
134 | *err = errno; | |
282d9ec3 | 135 | *errmsg = "dup"; |
29d89e07 | 136 | return (pid_t) -1; |
b109e79a | 137 | } |
282d9ec3 | 138 | if (dup2 (in, STDIN_FILE_NO) < 0) |
b109e79a ILT |
139 | { |
140 | *err = errno; | |
282d9ec3 | 141 | *errmsg = "dup2"; |
29d89e07 | 142 | return (pid_t) -1; |
b109e79a | 143 | } |
282d9ec3 | 144 | if (close (in) < 0) |
b109e79a ILT |
145 | { |
146 | *err = errno; | |
282d9ec3 | 147 | *errmsg = "close"; |
29d89e07 | 148 | return (pid_t) -1; |
b109e79a ILT |
149 | } |
150 | } | |
151 | ||
152 | if (out != STDOUT_FILE_NO) | |
153 | { | |
282d9ec3 | 154 | org_out = dup (STDOUT_FILE_NO); |
b109e79a ILT |
155 | if (org_out < 0) |
156 | { | |
157 | *err = errno; | |
282d9ec3 | 158 | *errmsg = "dup"; |
29d89e07 | 159 | return (pid_t) -1; |
b109e79a | 160 | } |
282d9ec3 | 161 | if (dup2 (out, STDOUT_FILE_NO) < 0) |
b109e79a ILT |
162 | { |
163 | *err = errno; | |
282d9ec3 | 164 | *errmsg = "dup2"; |
29d89e07 | 165 | return (pid_t) -1; |
b109e79a | 166 | } |
282d9ec3 | 167 | if (close (out) < 0) |
b109e79a ILT |
168 | { |
169 | *err = errno; | |
282d9ec3 | 170 | *errmsg = "close"; |
29d89e07 | 171 | return (pid_t) -1; |
b109e79a ILT |
172 | } |
173 | } | |
174 | ||
175 | if (errdes != STDERR_FILE_NO | |
176 | || (flags & PEX_STDERR_TO_STDOUT) != 0) | |
177 | { | |
282d9ec3 | 178 | org_errdes = dup (STDERR_FILE_NO); |
b109e79a ILT |
179 | if (org_errdes < 0) |
180 | { | |
181 | *err = errno; | |
282d9ec3 | 182 | *errmsg = "dup"; |
29d89e07 | 183 | return (pid_t) -1; |
b109e79a | 184 | } |
282d9ec3 | 185 | if (dup2 ((flags & PEX_STDERR_TO_STDOUT) != 0 ? STDOUT_FILE_NO : errdes, |
b109e79a ILT |
186 | STDERR_FILE_NO) < 0) |
187 | { | |
188 | *err = errno; | |
282d9ec3 | 189 | *errmsg = "dup2"; |
29d89e07 | 190 | return (pid_t) -1; |
b109e79a ILT |
191 | } |
192 | if (errdes != STDERR_FILE_NO) | |
193 | { | |
282d9ec3 | 194 | if (close (errdes) < 0) |
b109e79a ILT |
195 | { |
196 | *err = errno; | |
282d9ec3 | 197 | *errmsg = "close"; |
29d89e07 | 198 | return (pid_t) -1; |
b109e79a ILT |
199 | } |
200 | } | |
201 | } | |
202 | ||
014a8caf DD |
203 | if (env) |
204 | status = (((flags & PEX_SEARCH) != 0 ? spawnvpe : spawnve) | |
205 | (P_WAIT, executable, argv, env)); | |
206 | else | |
207 | status = (((flags & PEX_SEARCH) != 0 ? spawnvp : spawnv) | |
208 | (P_WAIT, executable, argv)); | |
b109e79a ILT |
209 | |
210 | if (status == -1) | |
211 | { | |
212 | *err = errno; | |
282d9ec3 | 213 | *errmsg = ((flags & PEX_SEARCH) != 0) ? "spawnvp" : "spawnv"; |
b109e79a ILT |
214 | } |
215 | ||
216 | if (in != STDIN_FILE_NO) | |
217 | { | |
282d9ec3 | 218 | if (dup2 (org_in, STDIN_FILE_NO) < 0) |
b109e79a ILT |
219 | { |
220 | *err = errno; | |
282d9ec3 | 221 | *errmsg = "dup2"; |
29d89e07 | 222 | return (pid_t) -1; |
b109e79a | 223 | } |
282d9ec3 | 224 | if (close (org_in) < 0) |
b109e79a ILT |
225 | { |
226 | *err = errno; | |
282d9ec3 | 227 | *errmsg = "close"; |
29d89e07 | 228 | return (pid_t) -1; |
b109e79a ILT |
229 | } |
230 | } | |
231 | ||
232 | if (out != STDOUT_FILE_NO) | |
233 | { | |
282d9ec3 | 234 | if (dup2 (org_out, STDOUT_FILE_NO) < 0) |
b109e79a ILT |
235 | { |
236 | *err = errno; | |
282d9ec3 | 237 | *errmsg = "dup2"; |
29d89e07 | 238 | return (pid_t) -1; |
b109e79a | 239 | } |
282d9ec3 | 240 | if (close (org_out) < 0) |
b109e79a ILT |
241 | { |
242 | *err = errno; | |
282d9ec3 | 243 | *errmsg = "close"; |
29d89e07 | 244 | return (pid_t) -1; |
b109e79a ILT |
245 | } |
246 | } | |
247 | ||
248 | if (errdes != STDERR_FILE_NO | |
249 | || (flags & PEX_STDERR_TO_STDOUT) != 0) | |
5a17353c | 250 | { |
282d9ec3 | 251 | if (dup2 (org_errdes, STDERR_FILE_NO) < 0) |
b109e79a ILT |
252 | { |
253 | *err = errno; | |
282d9ec3 | 254 | *errmsg = "dup2"; |
29d89e07 | 255 | return (pid_t) -1; |
b109e79a | 256 | } |
282d9ec3 | 257 | if (close (org_errdes) < 0) |
b109e79a ILT |
258 | { |
259 | *err = errno; | |
282d9ec3 | 260 | *errmsg = "close"; |
29d89e07 | 261 | return (pid_t) -1; |
b109e79a | 262 | } |
5a17353c | 263 | } |
b109e79a ILT |
264 | |
265 | /* Save the exit status for later. When we are called, obj->count | |
266 | is the number of children which have executed before this | |
267 | one. */ | |
268 | statuses = (int *) obj->sysdep; | |
abf6a75b | 269 | statuses = XRESIZEVEC (int, statuses, obj->count + 1); |
b109e79a ILT |
270 | statuses[obj->count] = status; |
271 | obj->sysdep = (void *) statuses; | |
272 | ||
29d89e07 | 273 | return (pid_t) obj->count; |
b109e79a ILT |
274 | } |
275 | ||
276 | /* Wait for a child process to complete. Actually the child process | |
277 | has already completed, and we just need to return the exit | |
278 | status. */ | |
279 | ||
587c6b96 | 280 | static pid_t |
29d89e07 | 281 | pex_djgpp_wait (struct pex_obj *obj, pid_t pid, int *status, |
282d9ec3 ILT |
282 | struct pex_time *time, int done ATTRIBUTE_UNUSED, |
283 | const char **errmsg ATTRIBUTE_UNUSED, | |
284 | int *err ATTRIBUTE_UNUSED) | |
b109e79a ILT |
285 | { |
286 | int *statuses; | |
287 | ||
288 | if (time != NULL) | |
289 | memset (time, 0, sizeof *time); | |
290 | ||
291 | statuses = (int *) obj->sysdep; | |
292 | *status = statuses[pid]; | |
293 | ||
294 | return 0; | |
5a17353c | 295 | } |