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f7a9f785 | 1 | /* Copyright (C) 1998-2016 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 |
9d46370c | 118 | _IO_old_proc_open (_IO_FILE *fp, const char *command, const char *mode) |
7d6a8338 | 119 | { |
7d6a8338 UD |
120 | volatile int read_or_write; |
121 | volatile int parent_end, child_end; | |
122 | int pipe_fds[2]; | |
123 | _IO_pid_t child_pid; | |
124 | if (_IO_file_is_open (fp)) | |
125 | return NULL; | |
126 | if (_IO_pipe (pipe_fds) < 0) | |
127 | return NULL; | |
128 | if (mode[0] == 'r' && mode[1] == '\0') | |
129 | { | |
130 | parent_end = pipe_fds[0]; | |
131 | child_end = pipe_fds[1]; | |
132 | read_or_write = _IO_NO_WRITES; | |
133 | } | |
134 | else if (mode[0] == 'w' && mode[1] == '\0') | |
135 | { | |
136 | parent_end = pipe_fds[1]; | |
137 | child_end = pipe_fds[0]; | |
138 | read_or_write = _IO_NO_READS; | |
139 | } | |
140 | else | |
141 | { | |
a4dec43d UD |
142 | _IO_close (pipe_fds[0]); |
143 | _IO_close (pipe_fds[1]); | |
7d6a8338 UD |
144 | __set_errno (EINVAL); |
145 | return NULL; | |
146 | } | |
147 | ((_IO_proc_file *) fp)->pid = child_pid = _IO_fork (); | |
148 | if (child_pid == 0) | |
149 | { | |
150 | int child_std_end = mode[0] == 'r' ? 1 : 0; | |
655c0697 | 151 | struct _IO_proc_file *p; |
16710d58 | 152 | |
7d6a8338 UD |
153 | _IO_close (parent_end); |
154 | if (child_end != child_std_end) | |
155 | { | |
156 | _IO_dup2 (child_end, child_std_end); | |
157 | _IO_close (child_end); | |
158 | } | |
159 | /* POSIX.2: "popen() shall ensure that any streams from previous | |
160 | popen() calls that remain open in the parent process are closed | |
161 | in the new child process." */ | |
655c0697 UD |
162 | for (p = old_proc_file_chain; p; p = p->next) |
163 | _IO_close (_IO_fileno ((_IO_FILE *) p)); | |
7d6a8338 UD |
164 | |
165 | _IO_execl ("/bin/sh", "sh", "-c", command, (char *) 0); | |
166 | _IO__exit (127); | |
167 | } | |
168 | _IO_close (child_end); | |
169 | if (child_pid < 0) | |
170 | { | |
171 | _IO_close (parent_end); | |
172 | return NULL; | |
173 | } | |
174 | _IO_fileno (fp) = parent_end; | |
175 | ||
176 | /* Link into old_proc_file_chain. */ | |
9ec9864b | 177 | #ifdef _IO_MTSAFE_IO |
ad71126b UD |
178 | _IO_cleanup_region_start_noarg (unlock); |
179 | _IO_lock_lock (proc_file_chain_lock); | |
180 | #endif | |
7d6a8338 UD |
181 | ((_IO_proc_file *) fp)->next = old_proc_file_chain; |
182 | old_proc_file_chain = (_IO_proc_file *) fp; | |
9ec9864b | 183 | #ifdef _IO_MTSAFE_IO |
ad71126b UD |
184 | _IO_lock_unlock (proc_file_chain_lock); |
185 | _IO_cleanup_region_end (0); | |
186 | #endif | |
7d6a8338 UD |
187 | |
188 | _IO_mask_flags (fp, read_or_write, _IO_NO_READS|_IO_NO_WRITES); | |
189 | return fp; | |
7d6a8338 UD |
190 | } |
191 | ||
192 | _IO_FILE * | |
4a381a81 | 193 | attribute_compat_text_section |
9d46370c | 194 | _IO_old_popen (const char *command, const char *mode) |
7d6a8338 UD |
195 | { |
196 | struct locked_FILE | |
197 | { | |
198 | struct _IO_proc_file fpx; | |
199 | #ifdef _IO_MTSAFE_IO | |
200 | _IO_lock_t lock; | |
201 | #endif | |
202 | } *new_f; | |
203 | _IO_FILE *fp; | |
204 | ||
205 | new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE)); | |
206 | if (new_f == NULL) | |
207 | return NULL; | |
208 | #ifdef _IO_MTSAFE_IO | |
7ea11363 | 209 | new_f->fpx.file.file._file._lock = &new_f->lock; |
7d6a8338 | 210 | #endif |
7ea11363 UD |
211 | fp = &new_f->fpx.file.file._file; |
212 | _IO_old_init (fp, 0); | |
e69dcccb | 213 | _IO_JUMPS_FILE_plus (&new_f->fpx.file) = &_IO_old_proc_jumps; |
7ea11363 | 214 | _IO_old_file_init ((struct _IO_FILE_plus *) &new_f->fpx.file); |
7d6a8338 UD |
215 | #if !_IO_UNIFIED_JUMPTABLES |
216 | new_f->fpx.file.vtable = NULL; | |
217 | #endif | |
218 | if (_IO_old_proc_open (fp, command, mode) != NULL) | |
219 | return fp; | |
d18ea0c5 | 220 | _IO_un_link ((struct _IO_FILE_plus *) &new_f->fpx.file); |
7d6a8338 UD |
221 | free (new_f); |
222 | return NULL; | |
223 | } | |
224 | ||
225 | int | |
4a381a81 | 226 | attribute_compat_text_section |
9d46370c | 227 | _IO_old_proc_close (_IO_FILE *fp) |
7d6a8338 UD |
228 | { |
229 | /* This is not name-space clean. FIXME! */ | |
7d6a8338 UD |
230 | int wstatus; |
231 | _IO_proc_file **ptr = &old_proc_file_chain; | |
232 | _IO_pid_t wait_pid; | |
233 | int status = -1; | |
234 | ||
235 | /* Unlink from old_proc_file_chain. */ | |
9ec9864b | 236 | #ifdef _IO_MTSAFE_IO |
ad71126b UD |
237 | _IO_cleanup_region_start_noarg (unlock); |
238 | _IO_lock_lock (proc_file_chain_lock); | |
239 | #endif | |
7d6a8338 UD |
240 | for ( ; *ptr != NULL; ptr = &(*ptr)->next) |
241 | { | |
242 | if (*ptr == (_IO_proc_file *) fp) | |
243 | { | |
244 | *ptr = (*ptr)->next; | |
245 | status = 0; | |
246 | break; | |
247 | } | |
248 | } | |
9ec9864b | 249 | #ifdef _IO_MTSAFE_IO |
ad71126b UD |
250 | _IO_lock_unlock (proc_file_chain_lock); |
251 | _IO_cleanup_region_end (0); | |
252 | #endif | |
7d6a8338 UD |
253 | |
254 | if (status < 0 || _IO_close (_IO_fileno(fp)) < 0) | |
255 | return -1; | |
256 | /* POSIX.2 Rationale: "Some historical implementations either block | |
257 | or ignore the signals SIGINT, SIGQUIT, and SIGHUP while waiting | |
258 | for the child process to terminate. Since this behavior is not | |
259 | described in POSIX.2, such implementations are not conforming." */ | |
260 | do | |
261 | { | |
262 | wait_pid = _IO_waitpid (((_IO_proc_file *) fp)->pid, &wstatus, 0); | |
263 | } | |
264 | while (wait_pid == -1 && errno == EINTR); | |
265 | if (wait_pid == -1) | |
266 | return -1; | |
267 | return wstatus; | |
7d6a8338 UD |
268 | } |
269 | ||
b2637a22 | 270 | const struct _IO_jump_t _IO_old_proc_jumps = { |
7d6a8338 UD |
271 | JUMP_INIT_DUMMY, |
272 | JUMP_INIT(finish, _IO_old_file_finish), | |
273 | JUMP_INIT(overflow, _IO_old_file_overflow), | |
274 | JUMP_INIT(underflow, _IO_old_file_underflow), | |
d18ea0c5 AS |
275 | JUMP_INIT(uflow, _IO_default_uflow), |
276 | JUMP_INIT(pbackfail, _IO_default_pbackfail), | |
7d6a8338 | 277 | JUMP_INIT(xsputn, _IO_old_file_xsputn), |
d18ea0c5 | 278 | JUMP_INIT(xsgetn, _IO_default_xsgetn), |
7d6a8338 UD |
279 | JUMP_INIT(seekoff, _IO_old_file_seekoff), |
280 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
281 | JUMP_INIT(setbuf, _IO_old_file_setbuf), | |
282 | JUMP_INIT(sync, _IO_old_file_sync), | |
d18ea0c5 AS |
283 | JUMP_INIT(doallocate, _IO_file_doallocate), |
284 | JUMP_INIT(read, _IO_file_read), | |
7d6a8338 | 285 | JUMP_INIT(write, _IO_old_file_write), |
d18ea0c5 | 286 | JUMP_INIT(seek, _IO_file_seek), |
7d6a8338 | 287 | JUMP_INIT(close, _IO_old_proc_close), |
d18ea0c5 | 288 | JUMP_INIT(stat, _IO_file_stat), |
7d6a8338 UD |
289 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
290 | JUMP_INIT(imbue, _IO_default_imbue) | |
291 | }; | |
292 | ||
293 | strong_alias (_IO_old_popen, __old_popen) | |
16710d58 RM |
294 | compat_symbol (libc, _IO_old_popen, _IO_popen, GLIBC_2_0); |
295 | compat_symbol (libc, __old_popen, popen, GLIBC_2_0); | |
296 | compat_symbol (libc, _IO_old_proc_open, _IO_proc_open, GLIBC_2_0); | |
297 | compat_symbol (libc, _IO_old_proc_close, _IO_proc_close, GLIBC_2_0); | |
298 | ||
299 | #endif |