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b168057a | 1 | /* Copyright (C) 1998-2015 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
7d6a8338 UD |
3 | Written by Per Bothner <bothner@cygnus.com>. |
4 | ||
41bdb6e2 AJ |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
7d6a8338 | 9 | |
41bdb6e2 AJ |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
7d6a8338 | 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 13 | Lesser General Public License for more details. |
7d6a8338 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. | |
7d6a8338 | 18 | |
41bdb6e2 AJ |
19 | As a special exception, if you link the code in this file with |
20 | files compiled with a GNU compiler to produce an executable, | |
21 | that does not cause the resulting executable to be covered by | |
22 | the GNU Lesser General Public License. This exception does not | |
23 | however invalidate any other reasons why the executable file | |
24 | might be covered by the GNU Lesser General Public License. | |
25 | This exception applies to code released by its copyright holders | |
26 | in files containing the exception. */ | |
7d6a8338 UD |
27 | |
28 | #define _IO_USE_OLD_IO_FILE | |
29 | #ifndef _POSIX_SOURCE | |
30 | # define _POSIX_SOURCE | |
31 | #endif | |
32 | #include "libioP.h" | |
7d6a8338 UD |
33 | #include <signal.h> |
34 | #include <unistd.h> | |
7d6a8338 | 35 | #include <stdlib.h> |
7d6a8338 UD |
36 | #ifdef _LIBC |
37 | # include <unistd.h> | |
38 | #endif | |
39 | #include <sys/types.h> | |
40 | #include <sys/wait.h> | |
41 | ||
42 | #ifndef _IO_fork | |
43 | #ifdef _LIBC | |
64d2a379 | 44 | #define _IO_fork __fork |
7d6a8338 | 45 | #else |
64d2a379 | 46 | #define _IO_fork fork /* defined in libiberty, if needed */ |
7d6a8338 | 47 | #endif |
79937577 | 48 | extern _IO_pid_t _IO_fork (void) __THROW; |
7d6a8338 UD |
49 | #endif |
50 | ||
5656e294 RM |
51 | #include <shlib-compat.h> |
52 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) | |
53 | ||
7d6a8338 UD |
54 | #ifndef _IO_pipe |
55 | #ifdef _LIBC | |
56 | #define _IO_pipe __pipe | |
57 | #else | |
58 | #define _IO_pipe pipe | |
59 | #endif | |
79937577 | 60 | extern int _IO_pipe (int des[2]) __THROW; |
7d6a8338 UD |
61 | #endif |
62 | ||
63 | #ifndef _IO_dup2 | |
64 | #ifdef _LIBC | |
65 | #define _IO_dup2 __dup2 | |
66 | #else | |
67 | #define _IO_dup2 dup2 | |
68 | #endif | |
79937577 | 69 | extern int _IO_dup2 (int fd, int fd2) __THROW; |
7d6a8338 UD |
70 | #endif |
71 | ||
72 | #ifndef _IO_waitpid | |
73 | #ifdef _LIBC | |
74 | #define _IO_waitpid __waitpid | |
75 | #else | |
76 | #define _IO_waitpid waitpid | |
77 | #endif | |
78 | #endif | |
79 | ||
80 | #ifndef _IO_execl | |
81 | #define _IO_execl execl | |
82 | #endif | |
83 | #ifndef _IO__exit | |
84 | #define _IO__exit _exit | |
85 | #endif | |
86 | ||
87 | #ifndef _IO_close | |
88 | #ifdef _LIBC | |
89 | #define _IO_close __close | |
90 | #else | |
91 | #define _IO_close close | |
92 | #endif | |
93 | #endif | |
94 | ||
95 | struct _IO_proc_file | |
96 | { | |
7ea11363 | 97 | struct _IO_FILE_complete_plus file; |
7d6a8338 UD |
98 | /* Following fields must match those in class procbuf (procbuf.h) */ |
99 | _IO_pid_t pid; | |
100 | struct _IO_proc_file *next; | |
101 | }; | |
102 | typedef struct _IO_proc_file _IO_proc_file; | |
103 | ||
390500b1 | 104 | static struct _IO_proc_file *old_proc_file_chain; |
7d6a8338 | 105 | |
ad71126b UD |
106 | #ifdef _IO_MTSAFE_IO |
107 | static _IO_lock_t proc_file_chain_lock = _IO_lock_initializer; | |
108 | ||
109 | static void | |
110 | unlock (void *not_used) | |
111 | { | |
112 | _IO_lock_unlock (proc_file_chain_lock); | |
113 | } | |
114 | #endif | |
115 | ||
7d6a8338 | 116 | _IO_FILE * |
4a381a81 | 117 | attribute_compat_text_section |
7d6a8338 UD |
118 | _IO_old_proc_open (fp, command, mode) |
119 | _IO_FILE *fp; | |
120 | const char *command; | |
121 | const char *mode; | |
122 | { | |
7d6a8338 UD |
123 | volatile int read_or_write; |
124 | volatile int parent_end, child_end; | |
125 | int pipe_fds[2]; | |
126 | _IO_pid_t child_pid; | |
127 | if (_IO_file_is_open (fp)) | |
128 | return NULL; | |
129 | if (_IO_pipe (pipe_fds) < 0) | |
130 | return NULL; | |
131 | if (mode[0] == 'r' && mode[1] == '\0') | |
132 | { | |
133 | parent_end = pipe_fds[0]; | |
134 | child_end = pipe_fds[1]; | |
135 | read_or_write = _IO_NO_WRITES; | |
136 | } | |
137 | else if (mode[0] == 'w' && mode[1] == '\0') | |
138 | { | |
139 | parent_end = pipe_fds[1]; | |
140 | child_end = pipe_fds[0]; | |
141 | read_or_write = _IO_NO_READS; | |
142 | } | |
143 | else | |
144 | { | |
a4dec43d UD |
145 | _IO_close (pipe_fds[0]); |
146 | _IO_close (pipe_fds[1]); | |
7d6a8338 UD |
147 | __set_errno (EINVAL); |
148 | return NULL; | |
149 | } | |
150 | ((_IO_proc_file *) fp)->pid = child_pid = _IO_fork (); | |
151 | if (child_pid == 0) | |
152 | { | |
153 | int child_std_end = mode[0] == 'r' ? 1 : 0; | |
655c0697 | 154 | struct _IO_proc_file *p; |
16710d58 | 155 | |
7d6a8338 UD |
156 | _IO_close (parent_end); |
157 | if (child_end != child_std_end) | |
158 | { | |
159 | _IO_dup2 (child_end, child_std_end); | |
160 | _IO_close (child_end); | |
161 | } | |
162 | /* POSIX.2: "popen() shall ensure that any streams from previous | |
163 | popen() calls that remain open in the parent process are closed | |
164 | in the new child process." */ | |
655c0697 UD |
165 | for (p = old_proc_file_chain; p; p = p->next) |
166 | _IO_close (_IO_fileno ((_IO_FILE *) p)); | |
7d6a8338 UD |
167 | |
168 | _IO_execl ("/bin/sh", "sh", "-c", command, (char *) 0); | |
169 | _IO__exit (127); | |
170 | } | |
171 | _IO_close (child_end); | |
172 | if (child_pid < 0) | |
173 | { | |
174 | _IO_close (parent_end); | |
175 | return NULL; | |
176 | } | |
177 | _IO_fileno (fp) = parent_end; | |
178 | ||
179 | /* Link into old_proc_file_chain. */ | |
9ec9864b | 180 | #ifdef _IO_MTSAFE_IO |
ad71126b UD |
181 | _IO_cleanup_region_start_noarg (unlock); |
182 | _IO_lock_lock (proc_file_chain_lock); | |
183 | #endif | |
7d6a8338 UD |
184 | ((_IO_proc_file *) fp)->next = old_proc_file_chain; |
185 | old_proc_file_chain = (_IO_proc_file *) fp; | |
9ec9864b | 186 | #ifdef _IO_MTSAFE_IO |
ad71126b UD |
187 | _IO_lock_unlock (proc_file_chain_lock); |
188 | _IO_cleanup_region_end (0); | |
189 | #endif | |
7d6a8338 UD |
190 | |
191 | _IO_mask_flags (fp, read_or_write, _IO_NO_READS|_IO_NO_WRITES); | |
192 | return fp; | |
7d6a8338 UD |
193 | } |
194 | ||
195 | _IO_FILE * | |
4a381a81 | 196 | attribute_compat_text_section |
7d6a8338 UD |
197 | _IO_old_popen (command, mode) |
198 | const char *command; | |
199 | const char *mode; | |
200 | { | |
201 | struct locked_FILE | |
202 | { | |
203 | struct _IO_proc_file fpx; | |
204 | #ifdef _IO_MTSAFE_IO | |
205 | _IO_lock_t lock; | |
206 | #endif | |
207 | } *new_f; | |
208 | _IO_FILE *fp; | |
209 | ||
210 | new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE)); | |
211 | if (new_f == NULL) | |
212 | return NULL; | |
213 | #ifdef _IO_MTSAFE_IO | |
7ea11363 | 214 | new_f->fpx.file.file._file._lock = &new_f->lock; |
7d6a8338 | 215 | #endif |
7ea11363 UD |
216 | fp = &new_f->fpx.file.file._file; |
217 | _IO_old_init (fp, 0); | |
218 | _IO_JUMPS ((struct _IO_FILE_plus *) &new_f->fpx.file) = &_IO_old_proc_jumps; | |
219 | _IO_old_file_init ((struct _IO_FILE_plus *) &new_f->fpx.file); | |
7d6a8338 UD |
220 | #if !_IO_UNIFIED_JUMPTABLES |
221 | new_f->fpx.file.vtable = NULL; | |
222 | #endif | |
223 | if (_IO_old_proc_open (fp, command, mode) != NULL) | |
224 | return fp; | |
d18ea0c5 | 225 | _IO_un_link ((struct _IO_FILE_plus *) &new_f->fpx.file); |
7d6a8338 UD |
226 | free (new_f); |
227 | return NULL; | |
228 | } | |
229 | ||
230 | int | |
4a381a81 | 231 | attribute_compat_text_section |
7d6a8338 UD |
232 | _IO_old_proc_close (fp) |
233 | _IO_FILE *fp; | |
234 | { | |
235 | /* This is not name-space clean. FIXME! */ | |
7d6a8338 UD |
236 | int wstatus; |
237 | _IO_proc_file **ptr = &old_proc_file_chain; | |
238 | _IO_pid_t wait_pid; | |
239 | int status = -1; | |
240 | ||
241 | /* Unlink from old_proc_file_chain. */ | |
9ec9864b | 242 | #ifdef _IO_MTSAFE_IO |
ad71126b UD |
243 | _IO_cleanup_region_start_noarg (unlock); |
244 | _IO_lock_lock (proc_file_chain_lock); | |
245 | #endif | |
7d6a8338 UD |
246 | for ( ; *ptr != NULL; ptr = &(*ptr)->next) |
247 | { | |
248 | if (*ptr == (_IO_proc_file *) fp) | |
249 | { | |
250 | *ptr = (*ptr)->next; | |
251 | status = 0; | |
252 | break; | |
253 | } | |
254 | } | |
9ec9864b | 255 | #ifdef _IO_MTSAFE_IO |
ad71126b UD |
256 | _IO_lock_unlock (proc_file_chain_lock); |
257 | _IO_cleanup_region_end (0); | |
258 | #endif | |
7d6a8338 UD |
259 | |
260 | if (status < 0 || _IO_close (_IO_fileno(fp)) < 0) | |
261 | return -1; | |
262 | /* POSIX.2 Rationale: "Some historical implementations either block | |
263 | or ignore the signals SIGINT, SIGQUIT, and SIGHUP while waiting | |
264 | for the child process to terminate. Since this behavior is not | |
265 | described in POSIX.2, such implementations are not conforming." */ | |
266 | do | |
267 | { | |
268 | wait_pid = _IO_waitpid (((_IO_proc_file *) fp)->pid, &wstatus, 0); | |
269 | } | |
270 | while (wait_pid == -1 && errno == EINTR); | |
271 | if (wait_pid == -1) | |
272 | return -1; | |
273 | return wstatus; | |
7d6a8338 UD |
274 | } |
275 | ||
b2637a22 | 276 | const struct _IO_jump_t _IO_old_proc_jumps = { |
7d6a8338 UD |
277 | JUMP_INIT_DUMMY, |
278 | JUMP_INIT(finish, _IO_old_file_finish), | |
279 | JUMP_INIT(overflow, _IO_old_file_overflow), | |
280 | JUMP_INIT(underflow, _IO_old_file_underflow), | |
d18ea0c5 AS |
281 | JUMP_INIT(uflow, _IO_default_uflow), |
282 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
7d6a8338 | 283 | JUMP_INIT(xsputn, _IO_old_file_xsputn), |
d18ea0c5 | 284 | JUMP_INIT(xsgetn, _IO_default_xsgetn), |
7d6a8338 UD |
285 | JUMP_INIT(seekoff, _IO_old_file_seekoff), |
286 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
287 | JUMP_INIT(setbuf, _IO_old_file_setbuf), | |
288 | JUMP_INIT(sync, _IO_old_file_sync), | |
d18ea0c5 AS |
289 | JUMP_INIT(doallocate, _IO_file_doallocate), |
290 | JUMP_INIT(read, _IO_file_read), | |
7d6a8338 | 291 | JUMP_INIT(write, _IO_old_file_write), |
d18ea0c5 | 292 | JUMP_INIT(seek, _IO_file_seek), |
7d6a8338 | 293 | JUMP_INIT(close, _IO_old_proc_close), |
d18ea0c5 | 294 | JUMP_INIT(stat, _IO_file_stat), |
7d6a8338 UD |
295 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
296 | JUMP_INIT(imbue, _IO_default_imbue) | |
297 | }; | |
298 | ||
299 | strong_alias (_IO_old_popen, __old_popen) | |
16710d58 RM |
300 | compat_symbol (libc, _IO_old_popen, _IO_popen, GLIBC_2_0); |
301 | compat_symbol (libc, __old_popen, popen, GLIBC_2_0); | |
302 | compat_symbol (libc, _IO_old_proc_open, _IO_proc_open, GLIBC_2_0); | |
303 | compat_symbol (libc, _IO_old_proc_close, _IO_proc_close, GLIBC_2_0); | |
304 | ||
305 | #endif |