Commit | Line | Data |
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c906108c | 1 | /* Fork a Unix child process, and set up to debug it, for GDB. |
74a4fe32 | 2 | |
6aba47ca | 3 | Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, |
7b6bb8da | 4 | 2001, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
4c38e0a4 | 5 | Free Software Foundation, Inc. |
74a4fe32 | 6 | |
c906108c SS |
7 | Contributed by Cygnus Support. |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "gdb_string.h" | |
c906108c | 26 | #include "inferior.h" |
191c4426 | 27 | #include "terminal.h" |
c906108c | 28 | #include "target.h" |
03f2053f | 29 | #include "gdb_wait.h" |
74c1b268 | 30 | #include "gdb_vfork.h" |
c906108c SS |
31 | #include "gdbcore.h" |
32 | #include "terminal.h" | |
33 | #include "gdbthread.h" | |
c2d11a7d | 34 | #include "command.h" /* for dont_repeat () */ |
ccd213ac | 35 | #include "gdbcmd.h" |
a77053c2 | 36 | #include "solib.h" |
c906108c SS |
37 | |
38 | #include <signal.h> | |
c906108c | 39 | |
74a4fe32 | 40 | /* This just gets used as a default if we can't find SHELL. */ |
c906108c | 41 | #define SHELL_FILE "/bin/sh" |
c906108c SS |
42 | |
43 | extern char **environ; | |
44 | ||
ccd213ac DJ |
45 | static char *exec_wrapper; |
46 | ||
74a4fe32 MK |
47 | /* Break up SCRATCH into an argument vector suitable for passing to |
48 | execvp and store it in ARGV. E.g., on "run a b c d" this routine | |
49 | would get as input the string "a b c d", and as output it would | |
50 | fill in ARGV with the four arguments "a", "b", "c", "d". */ | |
51 | ||
c906108c | 52 | static void |
fba45db2 | 53 | breakup_args (char *scratch, char **argv) |
c906108c | 54 | { |
55e39473 | 55 | char *cp = scratch, *tmp; |
c906108c | 56 | |
c906108c SS |
57 | for (;;) |
58 | { | |
c906108c SS |
59 | /* Scan past leading separators */ |
60 | while (*cp == ' ' || *cp == '\t' || *cp == '\n') | |
74a4fe32 | 61 | cp++; |
c906108c | 62 | |
74a4fe32 | 63 | /* Break if at end of string. */ |
c906108c SS |
64 | if (*cp == '\0') |
65 | break; | |
66 | ||
74a4fe32 | 67 | /* Take an arg. */ |
c906108c SS |
68 | *argv++ = cp; |
69 | ||
74a4fe32 | 70 | /* Scan for next arg separator. */ |
55e39473 MS |
71 | tmp = strchr (cp, ' '); |
72 | if (tmp == NULL) | |
73 | tmp = strchr (cp, '\t'); | |
74 | if (tmp == NULL) | |
75 | tmp = strchr (cp, '\n'); | |
c906108c | 76 | |
74a4fe32 | 77 | /* No separators => end of string => break. */ |
55e39473 | 78 | if (tmp == NULL) |
c906108c | 79 | break; |
55e39473 | 80 | cp = tmp; |
c906108c | 81 | |
74a4fe32 | 82 | /* Replace the separator with a terminator. */ |
c906108c SS |
83 | *cp++ = '\0'; |
84 | } | |
85 | ||
74a4fe32 | 86 | /* Null-terminate the vector. */ |
c906108c | 87 | *argv = NULL; |
c906108c SS |
88 | } |
89 | ||
74a4fe32 MK |
90 | /* When executing a command under the given shell, return non-zero if |
91 | the '!' character should be escaped when embedded in a quoted | |
6037b830 JB |
92 | command-line argument. */ |
93 | ||
94 | static int | |
95 | escape_bang_in_quoted_argument (const char *shell_file) | |
96 | { | |
97 | const int shell_file_len = strlen (shell_file); | |
74a4fe32 | 98 | |
6037b830 JB |
99 | /* Bang should be escaped only in C Shells. For now, simply check |
100 | that the shell name ends with 'csh', which covers at least csh | |
101 | and tcsh. This should be good enough for now. */ | |
102 | ||
103 | if (shell_file_len < 3) | |
104 | return 0; | |
105 | ||
106 | if (shell_file[shell_file_len - 3] == 'c' | |
107 | && shell_file[shell_file_len - 2] == 's' | |
108 | && shell_file[shell_file_len - 1] == 'h') | |
109 | return 1; | |
110 | ||
111 | return 0; | |
112 | } | |
c906108c | 113 | |
74a4fe32 MK |
114 | /* Start an inferior Unix child process and sets inferior_ptid to its |
115 | pid. EXEC_FILE is the file to run. ALLARGS is a string containing | |
116 | the arguments to the program. ENV is the environment vector to | |
117 | pass. SHELL_FILE is the shell file, or NULL if we should pick | |
118 | one. */ | |
c906108c | 119 | |
74a4fe32 MK |
120 | /* This function is NOT reentrant. Some of the variables have been |
121 | made static to ensure that they survive the vfork call. */ | |
c65ecaf3 | 122 | |
136d6dae | 123 | int |
c65ecaf3 | 124 | fork_inferior (char *exec_file_arg, char *allargs, char **env, |
073063d7 | 125 | void (*traceme_fun) (void), void (*init_trace_fun) (int), |
c65ecaf3 | 126 | void (*pre_trace_fun) (void), char *shell_file_arg) |
c906108c SS |
127 | { |
128 | int pid; | |
c906108c | 129 | static char default_shell_file[] = SHELL_FILE; |
0963b4bd | 130 | /* Set debug_fork then attach to the child while it sleeps, to debug. */ |
c906108c SS |
131 | static int debug_fork = 0; |
132 | /* This is set to the result of setpgrp, which if vforked, will be visible | |
133 | to you in the parent process. It's only used by humans for debugging. */ | |
134 | static int debug_setpgrp = 657473; | |
c65ecaf3 AC |
135 | static char *shell_file; |
136 | static char *exec_file; | |
c906108c SS |
137 | char **save_our_env; |
138 | int shell = 0; | |
c65ecaf3 | 139 | static char **argv; |
3cb3b8df | 140 | const char *inferior_io_terminal = get_inferior_io_terminal (); |
6c95b8df | 141 | struct inferior *inf; |
f877b031 TG |
142 | int i; |
143 | int save_errno; | |
c906108c | 144 | |
74a4fe32 MK |
145 | /* If no exec file handed to us, get it from the exec-file command |
146 | -- with a good, common error message if none is specified. */ | |
c65ecaf3 | 147 | exec_file = exec_file_arg; |
c906108c SS |
148 | if (exec_file == 0) |
149 | exec_file = get_exec_file (1); | |
150 | ||
74a4fe32 MK |
151 | /* STARTUP_WITH_SHELL is defined in inferior.h. If 0,e we'll just |
152 | do a fork/exec, no shell, so don't bother figuring out what | |
153 | shell. */ | |
c65ecaf3 | 154 | shell_file = shell_file_arg; |
c906108c SS |
155 | if (STARTUP_WITH_SHELL) |
156 | { | |
74a4fe32 | 157 | /* Figure out what shell to start up the user program under. */ |
c906108c SS |
158 | if (shell_file == NULL) |
159 | shell_file = getenv ("SHELL"); | |
160 | if (shell_file == NULL) | |
161 | shell_file = default_shell_file; | |
162 | shell = 1; | |
163 | } | |
164 | ||
c906108c SS |
165 | if (!shell) |
166 | { | |
74a4fe32 MK |
167 | /* We're going to call execvp. Create argument vector. |
168 | Calculate an upper bound on the length of the vector by | |
169 | assuming that every other character is a separate | |
170 | argument. */ | |
171 | int argc = (strlen (allargs) + 1) / 2 + 2; | |
bb9bcb69 | 172 | |
f877b031 | 173 | argv = (char **) alloca (argc * sizeof (*argv)); |
c906108c SS |
174 | argv[0] = exec_file; |
175 | breakup_args (allargs, &argv[1]); | |
c906108c SS |
176 | } |
177 | else | |
178 | { | |
74a4fe32 | 179 | /* We're going to call a shell. */ |
f877b031 TG |
180 | char *shell_command; |
181 | int len; | |
c906108c SS |
182 | char *p; |
183 | int need_to_quote; | |
6037b830 | 184 | const int escape_bang = escape_bang_in_quoted_argument (shell_file); |
c906108c | 185 | |
f877b031 TG |
186 | /* Multiplying the length of exec_file by 4 is to account for the |
187 | fact that it may expand when quoted; it is a worst-case number | |
188 | based on every character being '. */ | |
189 | len = 5 + 4 * strlen (exec_file) + 1 + strlen (allargs) + 1 + /*slop */ 12; | |
190 | if (exec_wrapper) | |
191 | len += strlen (exec_wrapper) + 1; | |
192 | ||
193 | shell_command = (char *) alloca (len); | |
194 | shell_command[0] = '\0'; | |
195 | ||
c906108c SS |
196 | strcat (shell_command, "exec "); |
197 | ||
ccd213ac DJ |
198 | /* Add any exec wrapper. That may be a program name with arguments, so |
199 | the user must handle quoting. */ | |
200 | if (exec_wrapper) | |
201 | { | |
202 | strcat (shell_command, exec_wrapper); | |
203 | strcat (shell_command, " "); | |
204 | } | |
205 | ||
206 | /* Now add exec_file, quoting as necessary. */ | |
207 | ||
74a4fe32 MK |
208 | /* Quoting in this style is said to work with all shells. But |
209 | csh on IRIX 4.0.1 can't deal with it. So we only quote it if | |
210 | we need to. */ | |
c906108c SS |
211 | p = exec_file; |
212 | while (1) | |
213 | { | |
214 | switch (*p) | |
215 | { | |
216 | case '\'': | |
d8849953 | 217 | case '!': |
c906108c SS |
218 | case '"': |
219 | case '(': | |
220 | case ')': | |
221 | case '$': | |
222 | case '&': | |
223 | case ';': | |
224 | case '<': | |
225 | case '>': | |
226 | case ' ': | |
227 | case '\n': | |
228 | case '\t': | |
229 | need_to_quote = 1; | |
230 | goto end_scan; | |
231 | ||
232 | case '\0': | |
233 | need_to_quote = 0; | |
234 | goto end_scan; | |
235 | ||
236 | default: | |
237 | break; | |
238 | } | |
239 | ++p; | |
240 | } | |
241 | end_scan: | |
242 | if (need_to_quote) | |
243 | { | |
244 | strcat (shell_command, "'"); | |
245 | for (p = exec_file; *p != '\0'; ++p) | |
246 | { | |
247 | if (*p == '\'') | |
248 | strcat (shell_command, "'\\''"); | |
6037b830 | 249 | else if (*p == '!' && escape_bang) |
d8849953 | 250 | strcat (shell_command, "\\!"); |
c906108c SS |
251 | else |
252 | strncat (shell_command, p, 1); | |
253 | } | |
254 | strcat (shell_command, "'"); | |
255 | } | |
256 | else | |
257 | strcat (shell_command, exec_file); | |
258 | ||
259 | strcat (shell_command, " "); | |
260 | strcat (shell_command, allargs); | |
f877b031 TG |
261 | |
262 | /* If we decided above to start up with a shell, we exec the | |
263 | shell, "-c" says to interpret the next arg as a shell command | |
264 | to execute, and this command is "exec <target-program> | |
265 | <args>". */ | |
266 | argv = (char **) alloca (4 * sizeof (char *)); | |
267 | argv[0] = shell_file; | |
268 | argv[1] = "-c"; | |
269 | argv[2] = shell_command; | |
270 | argv[3] = (char *) 0; | |
c906108c SS |
271 | } |
272 | ||
74a4fe32 | 273 | /* On some systems an exec will fail if the executable is open. */ |
c906108c SS |
274 | close_exec_file (); |
275 | ||
276 | /* Retain a copy of our environment variables, since the child will | |
74a4fe32 | 277 | replace the value of environ and if we're vforked, we have to |
c906108c SS |
278 | restore it. */ |
279 | save_our_env = environ; | |
280 | ||
281 | /* Tell the terminal handling subsystem what tty we plan to run on; | |
282 | it will just record the information for later. */ | |
c906108c SS |
283 | new_tty_prefork (inferior_io_terminal); |
284 | ||
285 | /* It is generally good practice to flush any possible pending stdio | |
74a4fe32 | 286 | output prior to doing a fork, to avoid the possibility of both |
0963b4bd | 287 | the parent and child flushing the same data after the fork. */ |
c906108c SS |
288 | gdb_flush (gdb_stdout); |
289 | gdb_flush (gdb_stderr); | |
290 | ||
74a4fe32 MK |
291 | /* If there's any initialization of the target layers that must |
292 | happen to prepare to handle the child we're about fork, do it | |
293 | now... */ | |
c906108c SS |
294 | if (pre_trace_fun != NULL) |
295 | (*pre_trace_fun) (); | |
296 | ||
3919e12c | 297 | /* Create the child process. Since the child process is going to |
7a0b0196 | 298 | exec(3) shortly afterwards, try to reduce the overhead by |
3919e12c MK |
299 | calling vfork(2). However, if PRE_TRACE_FUN is non-null, it's |
300 | likely that this optimization won't work since there's too much | |
301 | work to do between the vfork(2) and the exec(3). This is known | |
302 | to be the case on ttrace(2)-based HP-UX, where some handshaking | |
303 | between parent and child needs to happen between fork(2) and | |
304 | exec(2). However, since the parent is suspended in the vforked | |
305 | state, this doesn't work. Also note that the vfork(2) call might | |
306 | actually be a call to fork(2) due to the fact that autoconf will | |
307 | ``#define vfork fork'' on certain platforms. */ | |
308 | if (pre_trace_fun || debug_fork) | |
c906108c SS |
309 | pid = fork (); |
310 | else | |
311 | pid = vfork (); | |
c906108c SS |
312 | |
313 | if (pid < 0) | |
e2e0b3e5 | 314 | perror_with_name (("vfork")); |
c906108c SS |
315 | |
316 | if (pid == 0) | |
317 | { | |
318 | if (debug_fork) | |
319 | sleep (debug_fork); | |
320 | ||
83116857 TJB |
321 | /* Create a new session for the inferior process, if necessary. |
322 | It will also place the inferior in a separate process group. */ | |
323 | if (create_tty_session () <= 0) | |
324 | { | |
325 | /* No session was created, but we still want to run the inferior | |
326 | in a separate process group. */ | |
327 | debug_setpgrp = gdb_setpgid (); | |
328 | if (debug_setpgrp == -1) | |
9b20d036 | 329 | perror (_("setpgrp failed in child")); |
83116857 | 330 | } |
c906108c | 331 | |
74a4fe32 MK |
332 | /* Ask the tty subsystem to switch to the one we specified |
333 | earlier (or to share the current terminal, if none was | |
334 | specified). */ | |
c906108c SS |
335 | new_tty (); |
336 | ||
337 | /* Changing the signal handlers for the inferior after | |
c5aa993b JM |
338 | a vfork can also change them for the superior, so we don't mess |
339 | with signals here. See comments in | |
340 | initialize_signals for how we get the right signal handlers | |
341 | for the inferior. */ | |
c906108c | 342 | |
0963b4bd | 343 | /* "Trace me, Dr. Memory!" */ |
c906108c | 344 | (*traceme_fun) (); |
74a4fe32 | 345 | |
c906108c | 346 | /* The call above set this process (the "child") as debuggable |
74a4fe32 MK |
347 | by the original gdb process (the "parent"). Since processes |
348 | (unlike people) can have only one parent, if you are debugging | |
349 | gdb itself (and your debugger is thus _already_ the | |
350 | controller/parent for this child), code from here on out is | |
351 | undebuggable. Indeed, you probably got an error message | |
352 | saying "not parent". Sorry; you'll have to use print | |
353 | statements! */ | |
c906108c SS |
354 | |
355 | /* There is no execlpe call, so we have to set the environment | |
c5aa993b JM |
356 | for our child in the global variable. If we've vforked, this |
357 | clobbers the parent, but environ is restored a few lines down | |
358 | in the parent. By the way, yes we do need to look down the | |
359 | path to find $SHELL. Rich Pixley says so, and I agree. */ | |
c906108c SS |
360 | environ = env; |
361 | ||
f877b031 TG |
362 | execvp (argv[0], argv); |
363 | ||
364 | /* If we get here, it's an error. */ | |
365 | save_errno = errno; | |
366 | fprintf_unfiltered (gdb_stderr, "Cannot exec %s", exec_file); | |
367 | for (i = 1; argv[i] != NULL; i++) | |
368 | fprintf_unfiltered (gdb_stderr, " %s", argv[i]); | |
369 | fprintf_unfiltered (gdb_stderr, ".\n"); | |
370 | fprintf_unfiltered (gdb_stderr, "Error: %s\n", | |
371 | safe_strerror (save_errno)); | |
372 | gdb_flush (gdb_stderr); | |
373 | _exit (0177); | |
c906108c SS |
374 | } |
375 | ||
376 | /* Restore our environment in case a vforked child clob'd it. */ | |
377 | environ = save_our_env; | |
378 | ||
d90e17a7 PA |
379 | if (!have_inferiors ()) |
380 | init_thread_list (); | |
c906108c | 381 | |
6c95b8df PA |
382 | inf = current_inferior (); |
383 | ||
384 | inferior_appeared (inf, pid); | |
7f9f62ba | 385 | |
74a4fe32 MK |
386 | /* Needed for wait_for_inferior stuff below. */ |
387 | inferior_ptid = pid_to_ptid (pid); | |
c906108c | 388 | |
191c4426 PA |
389 | new_tty_postfork (); |
390 | ||
27c9d204 PA |
391 | /* We have something that executes now. We'll be running through |
392 | the shell at this point, but the pid shouldn't change. Targets | |
393 | supporting MT should fill this task's ptid with more data as soon | |
394 | as they can. */ | |
395 | add_thread_silent (inferior_ptid); | |
396 | ||
c906108c | 397 | /* Now that we have a child process, make it our target, and |
74a4fe32 MK |
398 | initialize anything target-vector-specific that needs |
399 | initializing. */ | |
136d6dae VP |
400 | if (init_trace_fun) |
401 | (*init_trace_fun) (pid); | |
c906108c SS |
402 | |
403 | /* We are now in the child process of interest, having exec'd the | |
404 | correct program, and are poised at the first instruction of the | |
405 | new program. */ | |
136d6dae | 406 | return pid; |
c906108c SS |
407 | } |
408 | ||
c906108c SS |
409 | /* Accept NTRAPS traps from the inferior. */ |
410 | ||
411 | void | |
fba45db2 | 412 | startup_inferior (int ntraps) |
c906108c SS |
413 | { |
414 | int pending_execs = ntraps; | |
74a4fe32 | 415 | int terminal_initted = 0; |
d90e17a7 PA |
416 | ptid_t resume_ptid; |
417 | ||
418 | if (target_supports_multi_process ()) | |
419 | resume_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid)); | |
420 | else | |
421 | resume_ptid = minus_one_ptid; | |
c906108c | 422 | |
74a4fe32 MK |
423 | /* The process was started by the fork that created it, but it will |
424 | have stopped one instruction after execing the shell. Here we | |
425 | must get it up to actual execution of the real program. */ | |
c906108c | 426 | |
ccd213ac DJ |
427 | if (exec_wrapper) |
428 | pending_execs++; | |
429 | ||
c906108c SS |
430 | while (1) |
431 | { | |
423ec54c | 432 | enum target_signal resume_signal = TARGET_SIGNAL_0; |
2e979b94 | 433 | ptid_t event_ptid; |
3c35e65b UW |
434 | |
435 | struct target_waitstatus ws; | |
436 | memset (&ws, 0, sizeof (ws)); | |
47608cb1 | 437 | event_ptid = target_wait (resume_ptid, &ws, 0); |
3c35e65b | 438 | |
2e979b94 PA |
439 | if (ws.kind == TARGET_WAITKIND_IGNORE) |
440 | /* The inferior didn't really stop, keep waiting. */ | |
441 | continue; | |
3c35e65b UW |
442 | |
443 | switch (ws.kind) | |
444 | { | |
3c35e65b UW |
445 | case TARGET_WAITKIND_SPURIOUS: |
446 | case TARGET_WAITKIND_LOADED: | |
447 | case TARGET_WAITKIND_FORKED: | |
448 | case TARGET_WAITKIND_VFORKED: | |
449 | case TARGET_WAITKIND_SYSCALL_ENTRY: | |
450 | case TARGET_WAITKIND_SYSCALL_RETURN: | |
451 | /* Ignore gracefully during startup of the inferior. */ | |
2e979b94 | 452 | switch_to_thread (event_ptid); |
3c35e65b UW |
453 | break; |
454 | ||
455 | case TARGET_WAITKIND_SIGNALLED: | |
456 | target_terminal_ours (); | |
457 | target_mourn_inferior (); | |
458 | error (_("During startup program terminated with signal %s, %s."), | |
459 | target_signal_to_name (ws.value.sig), | |
460 | target_signal_to_string (ws.value.sig)); | |
461 | return; | |
462 | ||
463 | case TARGET_WAITKIND_EXITED: | |
464 | target_terminal_ours (); | |
465 | target_mourn_inferior (); | |
466 | if (ws.value.integer) | |
467 | error (_("During startup program exited with code %d."), | |
468 | ws.value.integer); | |
469 | else | |
470 | error (_("During startup program exited normally.")); | |
471 | return; | |
472 | ||
473 | case TARGET_WAITKIND_EXECD: | |
474 | /* Handle EXEC signals as if they were SIGTRAP signals. */ | |
475 | xfree (ws.value.execd_pathname); | |
476 | resume_signal = TARGET_SIGNAL_TRAP; | |
2e979b94 | 477 | switch_to_thread (event_ptid); |
3c35e65b UW |
478 | break; |
479 | ||
480 | case TARGET_WAITKIND_STOPPED: | |
481 | resume_signal = ws.value.sig; | |
2e979b94 | 482 | switch_to_thread (event_ptid); |
3c35e65b UW |
483 | break; |
484 | } | |
2020b7ab | 485 | |
3c35e65b | 486 | if (resume_signal != TARGET_SIGNAL_TRAP) |
c906108c | 487 | { |
3c35e65b UW |
488 | /* Let shell child handle its own signals in its own way. */ |
489 | target_resume (resume_ptid, 0, resume_signal); | |
c906108c SS |
490 | } |
491 | else | |
492 | { | |
493 | /* We handle SIGTRAP, however; it means child did an exec. */ | |
494 | if (!terminal_initted) | |
495 | { | |
74a4fe32 MK |
496 | /* Now that the child has exec'd we know it has already |
497 | set its process group. On POSIX systems, tcsetpgrp | |
498 | will fail with EPERM if we try it before the child's | |
499 | setpgid. */ | |
c906108c SS |
500 | |
501 | /* Set up the "saved terminal modes" of the inferior | |
c5aa993b | 502 | based on what modes we are starting it with. */ |
c906108c SS |
503 | target_terminal_init (); |
504 | ||
505 | /* Install inferior's terminal modes. */ | |
506 | target_terminal_inferior (); | |
507 | ||
508 | terminal_initted = 1; | |
509 | } | |
510 | ||
74a4fe32 | 511 | if (--pending_execs == 0) |
c906108c SS |
512 | break; |
513 | ||
3c35e65b UW |
514 | /* Just make it go on. */ |
515 | target_resume (resume_ptid, 0, TARGET_SIGNAL_0); | |
c906108c SS |
516 | } |
517 | } | |
2e979b94 PA |
518 | |
519 | /* Mark all threads non-executing. */ | |
d90e17a7 | 520 | set_executing (resume_ptid, 0); |
c906108c | 521 | } |
ccd213ac DJ |
522 | |
523 | /* Implement the "unset exec-wrapper" command. */ | |
524 | ||
525 | static void | |
526 | unset_exec_wrapper_command (char *args, int from_tty) | |
527 | { | |
528 | xfree (exec_wrapper); | |
529 | exec_wrapper = NULL; | |
530 | } | |
531 | ||
2c0b251b PA |
532 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
533 | extern initialize_file_ftype _initialize_fork_child; | |
534 | ||
ccd213ac DJ |
535 | void |
536 | _initialize_fork_child (void) | |
537 | { | |
538 | add_setshow_filename_cmd ("exec-wrapper", class_run, &exec_wrapper, _("\ | |
539 | Set a wrapper for running programs.\n\ | |
540 | The wrapper prepares the system and environment for the new program."), | |
541 | _("\ | |
542 | Show the wrapper for running programs."), NULL, | |
543 | NULL, NULL, | |
544 | &setlist, &showlist); | |
545 | ||
546 | add_cmd ("exec-wrapper", class_run, unset_exec_wrapper_command, | |
547 | _("Disable use of an execution wrapper."), | |
548 | &unsetlist); | |
549 | } |