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3fbdd536 | 1 | /* Fork a Unix child process, and set up to debug it, for GDB. |
8fc2b417 | 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1996 Free Software Foundation, Inc. |
3fbdd536 JG |
3 | Contributed by Cygnus Support. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program 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 | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
6c9638b4 | 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
3fbdd536 JG |
20 | |
21 | #include "defs.h" | |
2b576293 | 22 | #include "gdb_string.h" |
3fbdd536 JG |
23 | #include "frame.h" /* required by inferior.h */ |
24 | #include "inferior.h" | |
25 | #include "target.h" | |
26 | #include "wait.h" | |
27 | #include "gdbcore.h" | |
c18b613a | 28 | #include "terminal.h" |
fdfa3315 | 29 | #include "gdbthread.h" |
3fbdd536 JG |
30 | |
31 | #include <signal.h> | |
1a494973 C |
32 | #ifdef HAVE_UNISTD_H |
33 | #include <unistd.h> | |
34 | #endif | |
3fbdd536 | 35 | |
65b07ddc | 36 | #define DEBUGGING 0 |
3fbdd536 | 37 | |
65b07ddc | 38 | /* This just gets used as a default if we can't find SHELL */ |
3fbdd536 JG |
39 | #ifndef SHELL_FILE |
40 | #define SHELL_FILE "/bin/sh" | |
41 | #endif | |
42 | ||
65b07ddc DT |
43 | extern char **environ; |
44 | ||
45 | /* This function breaks up an argument string into an argument | |
46 | * vector suitable for passing to execvp(). | |
47 | * E.g., on "run a b c d" this routine would get as input | |
48 | * the string "a b c d", and as output it would fill in argv with | |
49 | * the four arguments "a", "b", "c", "d". | |
50 | */ | |
51 | static void | |
52 | breakup_args ( | |
53 | scratch, | |
54 | argv) | |
55 | char *scratch; | |
56 | char **argv; | |
57 | { | |
58 | char *cp = scratch; | |
59 | ||
60 | #if DEBUGGING | |
61 | printf("breakup_args: input = %s\n", scratch); | |
62 | #endif | |
63 | for (;;) { | |
64 | ||
65 | /* Scan past leading separators */ | |
66 | while (*cp == ' ' || *cp == '\t' || *cp == '\n') { | |
67 | cp++; | |
68 | } | |
69 | ||
70 | /* Break if at end of string */ | |
71 | if (*cp == '\0') break; | |
72 | ||
73 | /* Take an arg */ | |
74 | *argv++ = cp; | |
75 | ||
76 | /* Scan for next arg separator */ | |
77 | cp = strchr (cp, ' '); | |
78 | if (cp == NULL) | |
79 | cp = strchr (cp, '\t'); | |
80 | if (cp == NULL) | |
81 | cp = strchr (cp, '\n'); | |
82 | ||
83 | /* No separators => end of string => break */ | |
84 | if (cp == NULL) | |
85 | break; | |
86 | ||
87 | /* Replace the separator with a terminator */ | |
88 | *cp++ = '\0'; | |
89 | } | |
90 | ||
91 | /* execv requires a null-terminated arg vector */ | |
92 | *argv = NULL; | |
93 | ||
94 | } | |
95 | ||
96 | ||
08f74b92 JK |
97 | /* Start an inferior Unix child process and sets inferior_pid to its pid. |
98 | EXEC_FILE is the file to run. | |
99 | ALLARGS is a string containing the arguments to the program. | |
100 | ENV is the environment vector to pass. SHELL_FILE is the shell file, | |
101 | or NULL if we should pick one. Errors reported with error(). */ | |
102 | ||
3fbdd536 | 103 | void |
08f74b92 | 104 | fork_inferior (exec_file, allargs, env, traceme_fun, init_trace_fun, |
65b07ddc | 105 | pre_trace_fun, shell_file) |
3fbdd536 JG |
106 | char *exec_file; |
107 | char *allargs; | |
108 | char **env; | |
109 | void (*traceme_fun) PARAMS ((void)); | |
65b07ddc DT |
110 | void (*init_trace_fun) PARAMS ((int)); |
111 | void (*pre_trace_fun) PARAMS ((void)); | |
08f74b92 | 112 | char *shell_file; |
3fbdd536 JG |
113 | { |
114 | int pid; | |
115 | char *shell_command; | |
3fbdd536 JG |
116 | static char default_shell_file[] = SHELL_FILE; |
117 | int len; | |
3fbdd536 JG |
118 | /* Set debug_fork then attach to the child while it sleeps, to debug. */ |
119 | static int debug_fork = 0; | |
120 | /* This is set to the result of setpgrp, which if vforked, will be visible | |
121 | to you in the parent process. It's only used by humans for debugging. */ | |
122 | static int debug_setpgrp = 657473; | |
123 | char **save_our_env; | |
65b07ddc DT |
124 | int shell = 0; |
125 | char **argv; | |
126 | char *tryname; | |
3fbdd536 JG |
127 | |
128 | /* If no exec file handed to us, get it from the exec-file command -- with | |
129 | a good, common error message if none is specified. */ | |
130 | if (exec_file == 0) | |
131 | exec_file = get_exec_file(1); | |
132 | ||
65b07ddc DT |
133 | /* STARTUP_WITH_SHELL is defined in inferior.h. |
134 | * If 0, we'll just do a fork/exec, no shell, so don't | |
135 | * bother figuring out what shell. | |
136 | */ | |
137 | if (STARTUP_WITH_SHELL) { | |
138 | /* Figure out what shell to start up the user program under. */ | |
139 | if (shell_file == NULL) | |
140 | shell_file = getenv ("SHELL"); | |
141 | if (shell_file == NULL) | |
142 | shell_file = default_shell_file; | |
143 | shell = 1; | |
144 | } | |
145 | ||
146 | #if DEBUGGING | |
147 | printf("shell is %s\n", shell_file); | |
148 | #endif | |
3768398d JK |
149 | |
150 | /* Multiplying the length of exec_file by 4 is to account for the fact | |
151 | that it may expand when quoted; it is a worst-case number based on | |
152 | every character being '. */ | |
153 | len = 5 + 4 * strlen (exec_file) + 1 + strlen (allargs) + 1 + /*slop*/ 12; | |
3fbdd536 JG |
154 | /* If desired, concat something onto the front of ALLARGS. |
155 | SHELL_COMMAND is the result. */ | |
156 | #ifdef SHELL_COMMAND_CONCAT | |
157 | shell_command = (char *) alloca (strlen (SHELL_COMMAND_CONCAT) + len); | |
158 | strcpy (shell_command, SHELL_COMMAND_CONCAT); | |
159 | #else | |
160 | shell_command = (char *) alloca (len); | |
161 | shell_command[0] = '\0'; | |
162 | #endif | |
3768398d | 163 | |
65b07ddc DT |
164 | if (!shell) { |
165 | /* We're going to call execvp. Create argv */ | |
166 | /* Largest case: every other character is a separate arg */ | |
167 | #if DEBUGGING | |
168 | printf("allocating argv, length = %d\n", | |
169 | ( | |
170 | (strlen (allargs) + 1) / (unsigned) 2 | |
171 | + 2 | |
172 | ) * sizeof (*argv) | |
173 | ); | |
174 | #endif | |
175 | argv = (char **) xmalloc(((strlen (allargs) + 1) / (unsigned) 2 + 2) * sizeof (*argv)); | |
176 | argv[0] = exec_file; | |
177 | breakup_args(allargs, &argv[1]); | |
178 | ||
179 | } else { | |
180 | ||
181 | /* We're going to call a shell */ | |
182 | ||
183 | /* Now add exec_file, quoting as necessary. */ | |
184 | ||
3768398d | 185 | char *p; |
38bbfd37 | 186 | int need_to_quote; |
3768398d | 187 | |
65b07ddc DT |
188 | strcat (shell_command, "exec "); |
189 | ||
38bbfd37 JK |
190 | /* Quoting in this style is said to work with all shells. But csh |
191 | on IRIX 4.0.1 can't deal with it. So we only quote it if we need | |
192 | to. */ | |
193 | p = exec_file; | |
194 | while (1) | |
3768398d | 195 | { |
65b07ddc | 196 | switch (*p) |
38bbfd37 JK |
197 | { |
198 | case '\'': | |
199 | case '"': | |
200 | case '(': | |
201 | case ')': | |
202 | case '$': | |
203 | case '&': | |
204 | case ';': | |
205 | case '<': | |
206 | case '>': | |
207 | case ' ': | |
208 | case '\n': | |
209 | case '\t': | |
210 | need_to_quote = 1; | |
211 | goto end_scan; | |
212 | ||
213 | case '\0': | |
214 | need_to_quote = 0; | |
215 | goto end_scan; | |
216 | ||
217 | default: | |
218 | break; | |
219 | } | |
220 | ++p; | |
3768398d | 221 | } |
38bbfd37 JK |
222 | end_scan: |
223 | if (need_to_quote) | |
224 | { | |
65b07ddc DT |
225 | strcat (shell_command, "'"); |
226 | for (p = exec_file; *p != '\0'; ++p) | |
38bbfd37 JK |
227 | { |
228 | if (*p == '\'') | |
229 | strcat (shell_command, "'\\''"); | |
230 | else | |
231 | strncat (shell_command, p, 1); | |
232 | } | |
233 | strcat (shell_command, "'"); | |
234 | } | |
235 | else | |
236 | strcat (shell_command, exec_file); | |
65b07ddc DT |
237 | |
238 | strcat (shell_command, " "); | |
239 | strcat (shell_command, allargs); | |
3768398d | 240 | |
65b07ddc | 241 | } |
3fbdd536 JG |
242 | |
243 | /* exec is said to fail if the executable is open. */ | |
244 | close_exec_file (); | |
245 | ||
246 | /* Retain a copy of our environment variables, since the child will | |
247 | replace the value of environ and if we're vforked, we have to | |
248 | restore it. */ | |
249 | save_our_env = environ; | |
250 | ||
251 | /* Tell the terminal handling subsystem what tty we plan to run on; | |
252 | it will just record the information for later. */ | |
253 | ||
254 | new_tty_prefork (inferior_io_terminal); | |
255 | ||
256 | /* It is generally good practice to flush any possible pending stdio | |
257 | output prior to doing a fork, to avoid the possibility of both the | |
258 | parent and child flushing the same data after the fork. */ | |
259 | ||
199b2450 TL |
260 | gdb_flush (gdb_stdout); |
261 | gdb_flush (gdb_stderr); | |
3fbdd536 | 262 | |
65b07ddc DT |
263 | /* If there's any initialization of the target layers that must happen |
264 | to prepare to handle the child we're about fork, do it now... | |
265 | */ | |
266 | if (pre_trace_fun != NULL) | |
267 | (*pre_trace_fun) (); | |
268 | ||
3fbdd536 JG |
269 | #if defined(USG) && !defined(HAVE_VFORK) |
270 | pid = fork (); | |
271 | #else | |
272 | if (debug_fork) | |
273 | pid = fork (); | |
274 | else | |
275 | pid = vfork (); | |
276 | #endif | |
277 | ||
278 | if (pid < 0) | |
279 | perror_with_name ("vfork"); | |
280 | ||
281 | if (pid == 0) | |
282 | { | |
283 | if (debug_fork) | |
284 | sleep (debug_fork); | |
285 | ||
3fbdd536 | 286 | /* Run inferior in a separate process group. */ |
c2e247c4 | 287 | debug_setpgrp = gdb_setpgid (); |
3fbdd536 JG |
288 | if (debug_setpgrp == -1) |
289 | perror("setpgrp failed in child"); | |
3fbdd536 | 290 | |
3fbdd536 JG |
291 | /* Ask the tty subsystem to switch to the one we specified earlier |
292 | (or to share the current terminal, if none was specified). */ | |
293 | ||
294 | new_tty (); | |
295 | ||
296 | /* Changing the signal handlers for the inferior after | |
297 | a vfork can also change them for the superior, so we don't mess | |
298 | with signals here. See comments in | |
299 | initialize_signals for how we get the right signal handlers | |
300 | for the inferior. */ | |
301 | ||
302 | /* "Trace me, Dr. Memory!" */ | |
303 | (*traceme_fun) (); | |
65b07ddc DT |
304 | /* The call above set this process (the "child") as debuggable |
305 | * by the original gdb process (the "parent"). Since processes | |
306 | * (unlike people) can have only one parent, if you are | |
307 | * debugging gdb itself (and your debugger is thus _already_ the | |
308 | * controller/parent for this child), code from here on out | |
309 | * is undebuggable. Indeed, you probably got an error message | |
310 | * saying "not parent". Sorry--you'll have to use print statements! | |
311 | */ | |
3fbdd536 JG |
312 | |
313 | /* There is no execlpe call, so we have to set the environment | |
314 | for our child in the global variable. If we've vforked, this | |
315 | clobbers the parent, but environ is restored a few lines down | |
316 | in the parent. By the way, yes we do need to look down the | |
317 | path to find $SHELL. Rich Pixley says so, and I agree. */ | |
318 | environ = env; | |
3fbdd536 | 319 | |
65b07ddc DT |
320 | /* If we decided above to start up with a shell, |
321 | * we exec the shell, | |
322 | * "-c" says to interpret the next arg as a shell command | |
323 | * to execute, and this command is "exec <target-program> <args>". | |
324 | * "-f" means "fast startup" to the c-shell, which means | |
325 | * don't do .cshrc file. Doing .cshrc may cause fork/exec | |
326 | * events which will confuse debugger start-up code. | |
327 | */ | |
328 | if (shell) { | |
329 | #if 0 | |
330 | ||
331 | /* HP change is problematic. The -f option has different meanings | |
332 | for different shells. It is particularly inappropriate for | |
333 | bourne shells. */ | |
334 | execlp (shell_file, shell_file, "-f", "-c", shell_command, (char *)0); | |
335 | #else | |
336 | execlp (shell_file, shell_file, "-c", shell_command, (char *)0); | |
337 | #endif | |
338 | ||
339 | ||
340 | /* If we get here, it's an error */ | |
341 | fprintf_unfiltered (gdb_stderr, "Cannot exec %s: %s.\n", shell_file, | |
342 | safe_strerror (errno)); | |
343 | gdb_flush (gdb_stderr); | |
344 | _exit (0177); | |
345 | } else { | |
346 | /* Otherwise, we directly exec the target program with execvp. */ | |
347 | int i; | |
348 | char * errstring; | |
349 | #if DEBUGGING | |
350 | printf("about to exec target, exec_file = %s\n", exec_file); | |
351 | i = 0; | |
352 | while (argv[i] != NULL) { | |
353 | printf("strlen(argv[%d]) is %d\n", i, strlen(argv[i])); | |
354 | printf("argv[%d] is %s\n", i, argv[i]); | |
355 | i++; | |
356 | } | |
357 | #endif | |
358 | execvp (exec_file, argv); | |
359 | ||
360 | /* If we get here, it's an error */ | |
361 | errstring = safe_strerror (errno); | |
362 | fprintf_unfiltered (gdb_stderr, "Cannot exec %s ", exec_file); | |
363 | ||
364 | i = 1; | |
365 | while (argv[i] != NULL) { | |
366 | if (i != 1) | |
367 | fprintf_unfiltered (gdb_stderr, " "); | |
368 | fprintf_unfiltered (gdb_stderr, "%s", argv[i]); | |
369 | i++; | |
370 | } | |
371 | fprintf_unfiltered (gdb_stderr, ".\n"); | |
372 | /* This extra info seems to be useless | |
373 | fprintf_unfiltered (gdb_stderr, "Got error %s.\n", errstring); | |
374 | */ | |
375 | gdb_flush (gdb_stderr); | |
376 | _exit (0177); | |
377 | } | |
3fbdd536 JG |
378 | } |
379 | ||
380 | /* Restore our environment in case a vforked child clob'd it. */ | |
381 | environ = save_our_env; | |
382 | ||
de43d7d0 SG |
383 | init_thread_list(); |
384 | ||
bc28a06c JK |
385 | inferior_pid = pid; /* Needed for wait_for_inferior stuff below */ |
386 | ||
3fbdd536 JG |
387 | /* Now that we have a child process, make it our target, and |
388 | initialize anything target-vector-specific that needs initializing. */ | |
8fc2b417 | 389 | |
65b07ddc | 390 | (*init_trace_fun)(pid); |
3fbdd536 | 391 | |
bc28a06c JK |
392 | /* We are now in the child process of interest, having exec'd the |
393 | correct program, and are poised at the first instruction of the | |
394 | new program. */ | |
188c635f SG |
395 | |
396 | /* Allow target dependant code to play with the new process. This might be | |
397 | used to have target-specific code initialize a variable in the new process | |
398 | prior to executing the first instruction. */ | |
399 | TARGET_CREATE_INFERIOR_HOOK (pid); | |
400 | ||
bc28a06c JK |
401 | #ifdef SOLIB_CREATE_INFERIOR_HOOK |
402 | SOLIB_CREATE_INFERIOR_HOOK (pid); | |
403 | #endif | |
404 | } | |
405 | ||
65b07ddc DT |
406 | /* An inferior Unix process CHILD_PID has been created by a call to |
407 | fork() (or variants like vfork). It is presently stopped, and waiting | |
408 | to be resumed. clone_and_follow_inferior will fork the debugger, | |
409 | and that clone will "follow" (attach to) CHILD_PID. The original copy | |
410 | of the debugger will not touch CHILD_PID again. | |
411 | ||
412 | Also, the original debugger will set FOLLOWED_CHILD FALSE, while the | |
413 | clone will set it TRUE. | |
414 | */ | |
415 | void | |
416 | clone_and_follow_inferior (child_pid, followed_child) | |
417 | int child_pid; | |
418 | int *followed_child; | |
419 | { | |
420 | extern int auto_solib_add; | |
421 | ||
422 | int debugger_pid; | |
423 | int status; | |
424 | char pid_spelling [100]; /* Arbitrary but sufficient length. */ | |
425 | ||
426 | /* This semaphore is used to coordinate the two debuggers' handoff | |
427 | of CHILD_PID. The original debugger will detach from CHILD_PID, | |
428 | and then the clone debugger will attach to it. (It must be done | |
429 | this way because on some targets, only one process at a time can | |
430 | trace another. Thus, the original debugger must relinquish its | |
431 | tracing rights before the clone can pick them up.) | |
432 | */ | |
433 | #define SEM_TALK (1) | |
434 | #define SEM_LISTEN (0) | |
435 | int handoff_semaphore[2]; /* Original "talks" to [1], clone "listens" to [0] */ | |
436 | int talk_value = 99; | |
437 | int listen_value; | |
438 | ||
439 | /* Set debug_fork then attach to the child while it sleeps, to debug. */ | |
440 | static int debug_fork = 0; | |
441 | ||
442 | /* It is generally good practice to flush any possible pending stdio | |
443 | output prior to doing a fork, to avoid the possibility of both the | |
444 | parent and child flushing the same data after the fork. */ | |
445 | ||
446 | gdb_flush (gdb_stdout); | |
447 | gdb_flush (gdb_stderr); | |
448 | ||
449 | /* Open the semaphore pipes. | |
450 | */ | |
451 | status = pipe (handoff_semaphore); | |
452 | if (status < 0) | |
453 | error ("error getting pipe for handoff semaphore"); | |
454 | ||
455 | /* Clone the debugger. */ | |
456 | #if defined(USG) && !defined(HAVE_VFORK) | |
457 | debugger_pid = fork (); | |
458 | #else | |
459 | if (debug_fork) | |
460 | debugger_pid = fork (); | |
461 | else | |
462 | debugger_pid = vfork (); | |
463 | #endif | |
464 | ||
465 | if (debugger_pid < 0) | |
466 | perror_with_name ("fork"); | |
467 | ||
468 | /* Are we the original debugger? If so, we must relinquish all claims | |
469 | to CHILD_PID. */ | |
470 | if (debugger_pid != 0) | |
471 | { | |
472 | char signal_spelling[100]; /* Arbitrary but sufficient length */ | |
473 | ||
474 | /* Detach from CHILD_PID. Deliver a "stop" signal when we do, though, | |
475 | so that it remains stopped until the clone debugger can attach | |
476 | to it. | |
477 | */ | |
478 | detach_breakpoints (child_pid); | |
479 | ||
480 | sprintf (signal_spelling, "%d", target_signal_to_host (TARGET_SIGNAL_STOP)); | |
481 | target_require_detach (child_pid, signal_spelling, 1); | |
482 | ||
483 | /* Notify the clone debugger that it should attach to CHILD_PID. */ | |
484 | write (handoff_semaphore[SEM_TALK], &talk_value, sizeof (talk_value)); | |
485 | ||
486 | *followed_child = 0; | |
487 | } | |
488 | ||
489 | /* We're the child. */ | |
490 | else | |
491 | { | |
492 | if (debug_fork) | |
493 | sleep (debug_fork); | |
494 | ||
495 | /* The child (i.e., the cloned debugger) must now attach to | |
496 | CHILD_PID. inferior_pid is presently set to the parent process | |
497 | of the fork, while CHILD_PID should be the child process of the | |
498 | fork. | |
499 | ||
500 | Wait until the original debugger relinquishes control of CHILD_PID, | |
501 | though. | |
502 | */ | |
503 | read (handoff_semaphore[SEM_LISTEN], &listen_value, sizeof (listen_value)); | |
504 | ||
505 | /* Note that we DON'T want to actually detach from inferior_pid, | |
506 | because that would allow it to run free. The original | |
507 | debugger wants to retain control of the process. So, we | |
508 | just reset inferior_pid to CHILD_PID, and then ensure that all | |
509 | breakpoints are really set in CHILD_PID. | |
510 | */ | |
511 | target_mourn_inferior (); | |
512 | ||
513 | /* Ask the tty subsystem to switch to the one we specified earlier | |
514 | (or to share the current terminal, if none was specified). */ | |
515 | ||
516 | new_tty (); | |
517 | ||
518 | dont_repeat (); | |
519 | sprintf(pid_spelling, "%d", child_pid); | |
520 | target_require_attach (pid_spelling, 1); | |
521 | ||
522 | /* Perform any necessary cleanup, after attachment. (This form | |
523 | of attaching can behave differently on some targets than the | |
524 | standard method, where a process formerly not under debugger | |
525 | control was suddenly attached to..) | |
526 | */ | |
527 | target_post_follow_inferior_by_clone (); | |
528 | ||
529 | *followed_child = 1; | |
530 | } | |
531 | ||
532 | /* Discard the handoff sempahore. */ | |
533 | (void) close (handoff_semaphore[SEM_LISTEN]); | |
534 | (void) close (handoff_semaphore[SEM_TALK]); | |
535 | } | |
536 | ||
bc28a06c JK |
537 | /* Accept NTRAPS traps from the inferior. */ |
538 | ||
539 | void | |
540 | startup_inferior (ntraps) | |
541 | int ntraps; | |
542 | { | |
543 | int pending_execs = ntraps; | |
544 | int terminal_initted; | |
545 | ||
5d76c8e6 JK |
546 | /* The process was started by the fork that created it, |
547 | but it will have stopped one instruction after execing the shell. | |
548 | Here we must get it up to actual execution of the real program. */ | |
3fbdd536 | 549 | |
3fbdd536 JG |
550 | clear_proceed_status (); |
551 | ||
3fbdd536 JG |
552 | init_wait_for_inferior (); |
553 | ||
01dfd415 | 554 | terminal_initted = 0; |
3fbdd536 | 555 | |
65b07ddc DT |
556 | if (STARTUP_WITH_SHELL) |
557 | inferior_ignoring_startup_exec_events = ntraps; | |
558 | else | |
559 | inferior_ignoring_startup_exec_events = 0; | |
560 | inferior_ignoring_leading_exec_events = | |
561 | target_reported_exec_events_per_exec_call () - 1; | |
562 | ||
9f8219f1 SS |
563 | #ifdef STARTUP_INFERIOR |
564 | STARTUP_INFERIOR (pending_execs); | |
565 | #else | |
3fbdd536 JG |
566 | while (1) |
567 | { | |
568 | stop_soon_quietly = 1; /* Make wait_for_inferior be quiet */ | |
569 | wait_for_inferior (); | |
67ac9759 | 570 | if (stop_signal != TARGET_SIGNAL_TRAP) |
3fbdd536 JG |
571 | { |
572 | /* Let shell child handle its own signals in its own way */ | |
573 | /* FIXME, what if child has exit()ed? Must exit loop somehow */ | |
574 | resume (0, stop_signal); | |
575 | } | |
576 | else | |
577 | { | |
578 | /* We handle SIGTRAP, however; it means child did an exec. */ | |
01dfd415 JK |
579 | if (!terminal_initted) |
580 | { | |
581 | /* Now that the child has exec'd we know it has already set its | |
582 | process group. On POSIX systems, tcsetpgrp will fail with | |
583 | EPERM if we try it before the child's setpgid. */ | |
584 | ||
585 | /* Set up the "saved terminal modes" of the inferior | |
586 | based on what modes we are starting it with. */ | |
587 | target_terminal_init (); | |
588 | ||
589 | /* Install inferior's terminal modes. */ | |
590 | target_terminal_inferior (); | |
591 | ||
592 | terminal_initted = 1; | |
593 | } | |
65b07ddc DT |
594 | |
595 | pending_execs = pending_execs - 1; | |
596 | if (0 == pending_execs) | |
3fbdd536 | 597 | break; |
65b07ddc DT |
598 | |
599 | resume (0, TARGET_SIGNAL_0); /* Just make it go on */ | |
3fbdd536 JG |
600 | } |
601 | } | |
9f8219f1 | 602 | #endif /* STARTUP_INFERIOR */ |
3fbdd536 | 603 | stop_soon_quietly = 0; |
3fbdd536 | 604 | } |