Commit | Line | Data |
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bd5635a1 | 1 | /* Low level interface to ptrace, for GDB when running under Unix. |
ee0613d1 | 2 | Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc. |
bd5635a1 RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
715d2e06 | 6 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 7 | it under the terms of the GNU General Public License as published by |
715d2e06 JG |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
bd5635a1 | 10 | |
715d2e06 | 11 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
715d2e06 JG |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 | 19 | |
bd5635a1 | 20 | #include "defs.h" |
bd5635a1 RP |
21 | #include "frame.h" |
22 | #include "inferior.h" | |
23 | #include "command.h" | |
24 | #include "signals.h" | |
a88797b5 | 25 | #include "serial.h" |
a14a8fad | 26 | #include "terminal.h" |
bd5635a1 RP |
27 | #include "target.h" |
28 | ||
a14a8fad JK |
29 | #include <signal.h> |
30 | #include <fcntl.h> | |
31 | ||
32 | #if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY) && !defined (__GO32__) | |
33 | #define HAVE_SGTTY | |
bd5635a1 RP |
34 | #endif |
35 | ||
a14a8fad JK |
36 | #if defined (HAVE_TERMIOS) |
37 | #include <termios.h> | |
38 | #include <unistd.h> | |
39 | #endif | |
bd5635a1 | 40 | |
a14a8fad JK |
41 | #ifdef HAVE_TERMIOS |
42 | #define PROCESS_GROUP_TYPE pid_t | |
43 | #endif | |
44 | ||
45 | #ifdef HAVE_SGTTY | |
46 | #ifdef SHORT_PGRP | |
47 | /* This is only used for the ultra. Does it have pid_t? */ | |
48 | #define PROCESS_GROUP_TYPE short | |
49 | #else | |
50 | #define PROCESS_GROUP_TYPE int | |
51 | #endif | |
52 | #endif /* sgtty */ | |
bd5635a1 | 53 | |
e676a15f FF |
54 | static void |
55 | kill_command PARAMS ((char *, int)); | |
56 | ||
57 | static void | |
58 | terminal_ours_1 PARAMS ((int)); | |
2a5ec41d | 59 | |
bd5635a1 RP |
60 | /* Nonzero if we are debugging an attached outside process |
61 | rather than an inferior. */ | |
62 | ||
63 | int attach_flag; | |
64 | ||
65 | \f | |
66 | /* Record terminal status separately for debugger and inferior. */ | |
67 | ||
a88797b5 | 68 | static serial_t stdin_serial; |
bd5635a1 | 69 | |
a88797b5 FF |
70 | /* TTY state for the inferior. We save it whenever the inferior stops, and |
71 | restore it when it resumes. */ | |
72 | static serial_ttystate inferior_ttystate; | |
bd5635a1 | 73 | |
a88797b5 FF |
74 | /* Our own tty state, which we restore every time we need to deal with the |
75 | terminal. We only set it once, when GDB first starts. The settings of | |
76 | flags which readline saves and restores and unimportant. */ | |
77 | static serial_ttystate our_ttystate; | |
bd5635a1 | 78 | |
a88797b5 FF |
79 | /* fcntl flags for us and the inferior. Saved and restored just like |
80 | {our,inferior}_ttystate. */ | |
81 | static int tflags_inferior; | |
82 | static int tflags_ours; | |
bd5635a1 | 83 | |
a14a8fad JK |
84 | #ifdef PROCESS_GROUP_TYPE |
85 | /* Process group for us and the inferior. Saved and restored just like | |
86 | {our,inferior}_ttystate. */ | |
87 | PROCESS_GROUP_TYPE our_process_group; | |
88 | PROCESS_GROUP_TYPE inferior_process_group; | |
89 | #endif | |
90 | ||
a88797b5 FF |
91 | /* While the inferior is running, we want SIGINT and SIGQUIT to go to the |
92 | inferior only. If we have job control, that takes care of it. If not, | |
93 | we save our handlers in these two variables and set SIGINT and SIGQUIT | |
94 | to SIG_IGN. */ | |
bd5635a1 RP |
95 | static void (*sigint_ours) (); |
96 | static void (*sigquit_ours) (); | |
bd5635a1 | 97 | |
2a5ec41d JG |
98 | /* The name of the tty (from the `tty' command) that we gave to the inferior |
99 | when it was last started. */ | |
bd5635a1 | 100 | |
2a5ec41d | 101 | static char *inferior_thisrun_terminal; |
bd5635a1 | 102 | |
49781499 JK |
103 | /* Nonzero if our terminal settings are in effect. Zero if the |
104 | inferior's settings are in effect. Ignored if !gdb_has_a_terminal | |
105 | (). */ | |
2a5ec41d | 106 | |
bd5635a1 RP |
107 | static int terminal_is_ours; |
108 | ||
a88797b5 FF |
109 | enum {yes, no, have_not_checked} gdb_has_a_terminal_flag = have_not_checked; |
110 | ||
111 | /* Does GDB have a terminal (on stdin)? */ | |
112 | int | |
113 | gdb_has_a_terminal () | |
114 | { | |
115 | switch (gdb_has_a_terminal_flag) | |
116 | { | |
117 | case yes: | |
118 | return 1; | |
119 | case no: | |
120 | return 0; | |
121 | case have_not_checked: | |
122 | /* Get all the current tty settings (including whether we have a tty at | |
123 | all!). Can't do this in _initialize_inflow because SERIAL_FDOPEN | |
124 | won't work until the serial_ops_list is initialized. */ | |
125 | ||
49781499 | 126 | #ifdef F_GETFL |
a88797b5 | 127 | tflags_ours = fcntl (0, F_GETFL, 0); |
49781499 | 128 | #endif |
a88797b5 FF |
129 | |
130 | gdb_has_a_terminal_flag = no; | |
131 | stdin_serial = SERIAL_FDOPEN (0); | |
132 | if (stdin_serial != NULL) | |
133 | { | |
134 | our_ttystate = SERIAL_GET_TTY_STATE (stdin_serial); | |
a14a8fad | 135 | |
a88797b5 | 136 | if (our_ttystate != NULL) |
a14a8fad JK |
137 | { |
138 | gdb_has_a_terminal_flag = yes; | |
139 | #ifdef HAVE_TERMIOS | |
140 | our_process_group = tcgetpgrp (0); | |
141 | #endif | |
142 | #ifdef HAVE_SGTTY | |
d76eb5f4 | 143 | ioctl (0, TIOCGPGRP, &our_process_group); |
a14a8fad JK |
144 | #endif |
145 | } | |
a88797b5 FF |
146 | } |
147 | ||
148 | return gdb_has_a_terminal_flag == yes; | |
149 | } | |
150 | } | |
151 | ||
2a5ec41d JG |
152 | /* Macro for printing errors from ioctl operations */ |
153 | ||
154 | #define OOPSY(what) \ | |
155 | if (result == -1) \ | |
156 | fprintf(stderr, "[%s failed in terminal_inferior: %s]\n", \ | |
157 | what, strerror (errno)) | |
158 | ||
a88797b5 | 159 | static void terminal_ours_1 PARAMS ((int)); |
2a5ec41d | 160 | |
bd5635a1 RP |
161 | /* Initialize the terminal settings we record for the inferior, |
162 | before we actually run the inferior. */ | |
163 | ||
164 | void | |
165 | terminal_init_inferior () | |
166 | { | |
49781499 JK |
167 | if (gdb_has_a_terminal ()) |
168 | { | |
169 | /* We could just as well copy our_ttystate (if we felt like adding | |
170 | a new function SERIAL_COPY_TTY_STATE). */ | |
171 | if (inferior_ttystate) | |
172 | free (inferior_ttystate); | |
173 | inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial); | |
a14a8fad JK |
174 | #ifdef PROCESS_GROUP_TYPE |
175 | inferior_process_group = inferior_pid; | |
176 | #endif | |
49781499 JK |
177 | |
178 | /* Make sure that next time we call terminal_inferior (which will be | |
179 | before the program runs, as it needs to be), we install the new | |
180 | process group. */ | |
181 | terminal_is_ours = 1; | |
182 | } | |
bd5635a1 RP |
183 | } |
184 | ||
185 | /* Put the inferior's terminal settings into effect. | |
186 | This is preparation for starting or resuming the inferior. */ | |
187 | ||
188 | void | |
189 | terminal_inferior () | |
190 | { | |
a88797b5 FF |
191 | if (gdb_has_a_terminal () && terminal_is_ours |
192 | && inferior_thisrun_terminal == 0) | |
bd5635a1 | 193 | { |
a88797b5 FF |
194 | int result; |
195 | ||
49781499 | 196 | #ifdef F_GETFL |
a88797b5 FF |
197 | /* Is there a reason this is being done twice? It happens both |
198 | places we use F_SETFL, so I'm inclined to think perhaps there | |
199 | is some reason, however perverse. Perhaps not though... */ | |
2a5ec41d JG |
200 | result = fcntl (0, F_SETFL, tflags_inferior); |
201 | result = fcntl (0, F_SETFL, tflags_inferior); | |
202 | OOPSY ("fcntl F_SETFL"); | |
49781499 | 203 | #endif |
bd5635a1 | 204 | |
a88797b5 FF |
205 | /* Because we were careful to not change in or out of raw mode in |
206 | terminal_ours, we will not change in our out of raw mode with | |
207 | this call, so we don't flush any input. */ | |
208 | result = SERIAL_SET_TTY_STATE (stdin_serial, inferior_ttystate); | |
a14a8fad JK |
209 | OOPSY ("setting tty state"); |
210 | ||
211 | if (!job_control) | |
212 | { | |
213 | sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN); | |
214 | sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN); | |
215 | } | |
a88797b5 FF |
216 | |
217 | /* If attach_flag is set, we don't know whether we are sharing a | |
218 | terminal with the inferior or not. (attaching a process | |
219 | without a terminal is one case where we do not; attaching a | |
220 | process which we ran from the same shell as GDB via `&' is | |
221 | one case where we do, I think (but perhaps this is not | |
222 | `sharing' in the sense that we need to save and restore tty | |
223 | state)). I don't know if there is any way to tell whether we | |
224 | are sharing a terminal. So what we do is to go through all | |
a14a8fad JK |
225 | the saving and restoring of the tty state, but ignore errors |
226 | setting the process group, which will happen if we are not | |
227 | sharing a terminal). */ | |
a88797b5 | 228 | |
a14a8fad | 229 | if (job_control) |
a88797b5 | 230 | { |
a14a8fad JK |
231 | #ifdef HAVE_TERMIOS |
232 | result = tcsetpgrp (0, inferior_process_group); | |
233 | if (!attach_flag) | |
234 | OOPSY ("tcsetpgrp"); | |
235 | #endif | |
236 | ||
237 | #ifdef HAVE_SGTTY | |
179cd923 | 238 | result = ioctl (0, TIOCSPGRP, &inferior_process_group); |
a14a8fad JK |
239 | if (!attach_flag) |
240 | OOPSY ("TIOCSPGRP"); | |
241 | #endif | |
a88797b5 | 242 | } |
a14a8fad | 243 | |
bd5635a1 RP |
244 | } |
245 | terminal_is_ours = 0; | |
246 | } | |
247 | ||
248 | /* Put some of our terminal settings into effect, | |
249 | enough to get proper results from our output, | |
250 | but do not change into or out of RAW mode | |
251 | so that no input is discarded. | |
252 | ||
253 | After doing this, either terminal_ours or terminal_inferior | |
254 | should be called to get back to a normal state of affairs. */ | |
255 | ||
256 | void | |
257 | terminal_ours_for_output () | |
258 | { | |
259 | terminal_ours_1 (1); | |
260 | } | |
261 | ||
262 | /* Put our terminal settings into effect. | |
263 | First record the inferior's terminal settings | |
264 | so they can be restored properly later. */ | |
265 | ||
266 | void | |
267 | terminal_ours () | |
268 | { | |
269 | terminal_ours_1 (0); | |
270 | } | |
271 | ||
a88797b5 FF |
272 | /* output_only is not used, and should not be used unless we introduce |
273 | separate terminal_is_ours and terminal_is_ours_for_output | |
274 | flags. */ | |
275 | ||
bd5635a1 RP |
276 | static void |
277 | terminal_ours_1 (output_only) | |
278 | int output_only; | |
279 | { | |
2a5ec41d | 280 | /* Checking inferior_thisrun_terminal is necessary so that |
bd5635a1 | 281 | if GDB is running in the background, it won't block trying |
2a5ec41d JG |
282 | to do the ioctl()'s below. Checking gdb_has_a_terminal |
283 | avoids attempting all the ioctl's when running in batch. */ | |
a88797b5 | 284 | if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal () == 0) |
bd5635a1 RP |
285 | return; |
286 | ||
287 | if (!terminal_is_ours) | |
288 | { | |
a88797b5 FF |
289 | /* Ignore this signal since it will happen when we try to set the |
290 | pgrp. */ | |
291 | void (*osigttou) (); | |
292 | int result; | |
293 | ||
bd5635a1 RP |
294 | terminal_is_ours = 1; |
295 | ||
a88797b5 FF |
296 | #ifdef SIGTTOU |
297 | if (job_control) | |
298 | osigttou = (void (*) ()) signal (SIGTTOU, SIG_IGN); | |
299 | #endif | |
bd5635a1 | 300 | |
a88797b5 FF |
301 | if (inferior_ttystate) |
302 | free (inferior_ttystate); | |
303 | inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial); | |
a14a8fad JK |
304 | #ifdef HAVE_TERMIOS |
305 | inferior_process_group = tcgetpgrp (0); | |
306 | #endif | |
307 | #ifdef HAVE_SGTTY | |
d76eb5f4 | 308 | ioctl (0, TIOCGPGRP, &inferior_process_group); |
a14a8fad | 309 | #endif |
bd5635a1 | 310 | |
a88797b5 FF |
311 | /* Here we used to set ICANON in our ttystate, but I believe this |
312 | was an artifact from before when we used readline. Readline sets | |
313 | the tty state when it needs to. */ | |
bd5635a1 | 314 | |
a88797b5 FF |
315 | /* Set tty state to our_ttystate. We don't change in our out of raw |
316 | mode, to avoid flushing input. We need to do the same thing | |
317 | regardless of output_only, because we don't have separate | |
318 | terminal_is_ours and terminal_is_ours_for_output flags. It's OK, | |
319 | though, since readline will deal with raw mode when/if it needs to. | |
320 | */ | |
321 | SERIAL_NOFLUSH_SET_TTY_STATE (stdin_serial, our_ttystate, | |
322 | inferior_ttystate); | |
bd5635a1 | 323 | |
a14a8fad JK |
324 | if (job_control) |
325 | { | |
326 | #ifdef HAVE_TERMIOS | |
327 | result = tcsetpgrp (0, our_process_group); | |
76e473bb JK |
328 | #if 0 |
329 | /* This fails on Ultrix with EINVAL if you run the testsuite | |
330 | in the background with nohup, and then log out. GDB never | |
331 | used to check for an error here, so perhaps there are other | |
332 | such situations as well. */ | |
d76eb5f4 JK |
333 | if (result == -1) |
334 | fprintf (stderr, "[tcsetpgrp failed in terminal_ours: %s]\n", | |
335 | strerror (errno)); | |
a14a8fad | 336 | #endif |
76e473bb | 337 | #endif /* termios */ |
a14a8fad JK |
338 | |
339 | #ifdef HAVE_SGTTY | |
179cd923 | 340 | result = ioctl (0, TIOCSPGRP, &our_process_group); |
a14a8fad JK |
341 | #endif |
342 | } | |
343 | ||
a88797b5 FF |
344 | #ifdef SIGTTOU |
345 | if (job_control) | |
346 | signal (SIGTTOU, osigttou); | |
bd5635a1 | 347 | #endif |
bd5635a1 | 348 | |
a88797b5 FF |
349 | if (!job_control) |
350 | { | |
351 | signal (SIGINT, sigint_ours); | |
352 | signal (SIGQUIT, sigquit_ours); | |
353 | } | |
bd5635a1 | 354 | |
49781499 | 355 | #ifdef F_GETFL |
a88797b5 | 356 | tflags_inferior = fcntl (0, F_GETFL, 0); |
e676a15f | 357 | |
a88797b5 FF |
358 | /* Is there a reason this is being done twice? It happens both |
359 | places we use F_SETFL, so I'm inclined to think perhaps there | |
360 | is some reason, however perverse. Perhaps not though... */ | |
361 | result = fcntl (0, F_SETFL, tflags_ours); | |
362 | result = fcntl (0, F_SETFL, tflags_ours); | |
49781499 | 363 | #endif |
a88797b5 FF |
364 | |
365 | result = result; /* lint */ | |
366 | } | |
bd5635a1 RP |
367 | } |
368 | ||
369 | /* ARGSUSED */ | |
370 | void | |
371 | term_info (arg, from_tty) | |
372 | char *arg; | |
373 | int from_tty; | |
374 | { | |
375 | target_terminal_info (arg, from_tty); | |
376 | } | |
377 | ||
715d2e06 | 378 | /* ARGSUSED */ |
bd5635a1 RP |
379 | void |
380 | child_terminal_info (args, from_tty) | |
381 | char *args; | |
382 | int from_tty; | |
383 | { | |
a88797b5 FF |
384 | if (!gdb_has_a_terminal ()) |
385 | { | |
386 | printf_filtered ("This GDB does not control a terminal.\n"); | |
387 | return; | |
388 | } | |
bd5635a1 RP |
389 | |
390 | printf_filtered ("Inferior's terminal status (currently saved by GDB):\n"); | |
391 | ||
a88797b5 FF |
392 | /* First the fcntl flags. */ |
393 | { | |
394 | int flags; | |
395 | ||
396 | flags = tflags_inferior; | |
bd5635a1 | 397 | |
a88797b5 | 398 | printf_filtered ("File descriptor flags = "); |
bd5635a1 | 399 | |
a88797b5 FF |
400 | #ifndef O_ACCMODE |
401 | #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR) | |
bd5635a1 | 402 | #endif |
a88797b5 FF |
403 | /* (O_ACCMODE) parens are to avoid Ultrix header file bug */ |
404 | switch (flags & (O_ACCMODE)) | |
405 | { | |
406 | case O_RDONLY: printf_filtered ("O_RDONLY"); break; | |
407 | case O_WRONLY: printf_filtered ("O_WRONLY"); break; | |
408 | case O_RDWR: printf_filtered ("O_RDWR"); break; | |
409 | } | |
410 | flags &= ~(O_ACCMODE); | |
bd5635a1 | 411 | |
a88797b5 FF |
412 | #ifdef O_NONBLOCK |
413 | if (flags & O_NONBLOCK) | |
414 | printf_filtered (" | O_NONBLOCK"); | |
415 | flags &= ~O_NONBLOCK; | |
bd5635a1 | 416 | #endif |
a88797b5 FF |
417 | |
418 | #if defined (O_NDELAY) | |
419 | /* If O_NDELAY and O_NONBLOCK are defined to the same thing, we will | |
420 | print it as O_NONBLOCK, which is good cause that is what POSIX | |
421 | has, and the flag will already be cleared by the time we get here. */ | |
422 | if (flags & O_NDELAY) | |
423 | printf_filtered (" | O_NDELAY"); | |
424 | flags &= ~O_NDELAY; | |
bd5635a1 | 425 | #endif |
a88797b5 FF |
426 | |
427 | if (flags & O_APPEND) | |
428 | printf_filtered (" | O_APPEND"); | |
429 | flags &= ~O_APPEND; | |
430 | ||
431 | #if defined (O_BINARY) | |
432 | if (flags & O_BINARY) | |
433 | printf_filtered (" | O_BINARY"); | |
434 | flags &= ~O_BINARY; | |
e676a15f FF |
435 | #endif |
436 | ||
a88797b5 FF |
437 | if (flags) |
438 | printf_filtered (" | 0x%x", flags); | |
439 | printf_filtered ("\n"); | |
440 | } | |
441 | ||
a14a8fad JK |
442 | #ifdef PROCESS_GROUP_TYPE |
443 | printf_filtered ("Process group = %d\n", inferior_process_group); | |
444 | #endif | |
445 | ||
a88797b5 | 446 | SERIAL_PRINT_TTY_STATE (stdin_serial, inferior_ttystate); |
bd5635a1 RP |
447 | } |
448 | \f | |
715d2e06 JG |
449 | /* NEW_TTY_PREFORK is called before forking a new child process, |
450 | so we can record the state of ttys in the child to be formed. | |
451 | TTYNAME is null if we are to share the terminal with gdb; | |
452 | or points to a string containing the name of the desired tty. | |
bd5635a1 | 453 | |
715d2e06 JG |
454 | NEW_TTY is called in new child processes under Unix, which will |
455 | become debugger target processes. This actually switches to | |
456 | the terminal specified in the NEW_TTY_PREFORK call. */ | |
457 | ||
7d9884b9 | 458 | void |
715d2e06 | 459 | new_tty_prefork (ttyname) |
bd5635a1 RP |
460 | char *ttyname; |
461 | { | |
bd5635a1 RP |
462 | /* Save the name for later, for determining whether we and the child |
463 | are sharing a tty. */ | |
464 | inferior_thisrun_terminal = ttyname; | |
715d2e06 JG |
465 | } |
466 | ||
467 | void | |
468 | new_tty () | |
469 | { | |
470 | register int tty; | |
471 | ||
472 | if (inferior_thisrun_terminal == 0) | |
bd5635a1 | 473 | return; |
e676a15f | 474 | #if !defined(__GO32__) |
bd5635a1 | 475 | #ifdef TIOCNOTTY |
e676a15f FF |
476 | /* Disconnect the child process from our controlling terminal. On some |
477 | systems (SVR4 for example), this may cause a SIGTTOU, so temporarily | |
478 | ignore SIGTTOU. */ | |
bd5635a1 RP |
479 | tty = open("/dev/tty", O_RDWR); |
480 | if (tty > 0) | |
481 | { | |
49781499 JK |
482 | void (*osigttou) (); |
483 | ||
e676a15f | 484 | osigttou = (void (*)()) signal(SIGTTOU, SIG_IGN); |
bd5635a1 RP |
485 | ioctl(tty, TIOCNOTTY, 0); |
486 | close(tty); | |
a88797b5 | 487 | signal(SIGTTOU, osigttou); |
bd5635a1 RP |
488 | } |
489 | #endif | |
490 | ||
491 | /* Now open the specified new terminal. */ | |
492 | ||
7d9884b9 JG |
493 | #ifdef USE_O_NOCTTY |
494 | tty = open(inferior_thisrun_terminal, O_RDWR | O_NOCTTY); | |
495 | #else | |
715d2e06 | 496 | tty = open(inferior_thisrun_terminal, O_RDWR); |
7d9884b9 | 497 | #endif |
bd5635a1 RP |
498 | if (tty == -1) |
499 | { | |
715d2e06 | 500 | print_sys_errmsg (inferior_thisrun_terminal, errno); |
bd5635a1 RP |
501 | _exit(1); |
502 | } | |
503 | ||
504 | /* Avoid use of dup2; doesn't exist on all systems. */ | |
505 | if (tty != 0) | |
506 | { close (0); dup (tty); } | |
507 | if (tty != 1) | |
508 | { close (1); dup (tty); } | |
509 | if (tty != 2) | |
510 | { close (2); dup (tty); } | |
511 | if (tty > 2) | |
512 | close(tty); | |
a88797b5 | 513 | #endif /* !go32 */ |
bd5635a1 RP |
514 | } |
515 | \f | |
516 | /* Kill the inferior process. Make us have no inferior. */ | |
517 | ||
518 | /* ARGSUSED */ | |
519 | static void | |
520 | kill_command (arg, from_tty) | |
521 | char *arg; | |
522 | int from_tty; | |
523 | { | |
a88797b5 | 524 | /* Shouldn't this be target_has_execution? FIXME. */ |
bd5635a1 RP |
525 | if (inferior_pid == 0) |
526 | error ("The program is not being run."); | |
a88797b5 | 527 | if (!query ("Kill the program being debugged? ")) |
bd5635a1 | 528 | error ("Not confirmed."); |
ee0613d1 | 529 | target_kill (); |
777bef06 JK |
530 | |
531 | /* Killing off the inferior can leave us with a core file. If so, | |
532 | print the state we are left in. */ | |
533 | if (target_has_stack) { | |
534 | printf_filtered ("In %s,\n", current_target->to_longname); | |
535 | if (selected_frame == NULL) | |
536 | fputs_filtered ("No selected stack frame.\n", stdout); | |
537 | else | |
cadbb07a | 538 | print_stack_frame (selected_frame, selected_frame_level, 1); |
777bef06 | 539 | } |
bd5635a1 RP |
540 | } |
541 | ||
542 | /* The inferior process has died. Long live the inferior! */ | |
543 | ||
544 | void | |
545 | generic_mourn_inferior () | |
546 | { | |
547 | inferior_pid = 0; | |
548 | attach_flag = 0; | |
cf3e377e | 549 | breakpoint_init_inferior (); |
bd5635a1 RP |
550 | registers_changed (); |
551 | ||
552 | #ifdef CLEAR_DEFERRED_STORES | |
553 | /* Delete any pending stores to the inferior... */ | |
554 | CLEAR_DEFERRED_STORES; | |
555 | #endif | |
556 | ||
bd5635a1 | 557 | reopen_exec_file (); |
cf3e377e JK |
558 | reinit_frame_cache (); |
559 | ||
bd5635a1 RP |
560 | /* It is confusing to the user for ignore counts to stick around |
561 | from previous runs of the inferior. So clear them. */ | |
562 | breakpoint_clear_ignore_counts (); | |
563 | } | |
bd5635a1 | 564 | \f |
a88797b5 FF |
565 | /* Call set_sigint_trap when you need to pass a signal on to an attached |
566 | process when handling SIGINT */ | |
567 | ||
bd5635a1 RP |
568 | /* ARGSUSED */ |
569 | static void | |
a88797b5 FF |
570 | pass_signal (signo) |
571 | int signo; | |
bd5635a1 | 572 | { |
a88797b5 FF |
573 | kill (inferior_pid, SIGINT); |
574 | } | |
bd5635a1 | 575 | |
a88797b5 FF |
576 | static void (*osig)(); |
577 | ||
578 | void | |
579 | set_sigint_trap() | |
580 | { | |
581 | osig = (void (*) ()) signal (SIGINT, pass_signal); | |
582 | } | |
583 | ||
584 | void | |
585 | clear_sigint_trap() | |
586 | { | |
587 | signal (SIGINT, osig); | |
bd5635a1 | 588 | } |
bd5635a1 | 589 | \f |
a14a8fad JK |
590 | |
591 | int job_control; | |
592 | ||
593 | /* This is here because this is where we figure out whether we (probably) | |
594 | have job control. Just using job_control only does part of it because | |
595 | setpgid or setpgrp might not exist on a system without job control. | |
596 | It might be considered misplaced (on the other hand, process groups and | |
597 | job control are closely related to ttys). | |
598 | ||
599 | For a more clean implementation, in libiberty, put a setpgid which merely | |
600 | calls setpgrp and a setpgrp which does nothing (any system with job control | |
601 | will have one or the other). */ | |
602 | int | |
603 | gdb_setpgid () | |
604 | { | |
605 | int retval = 0; | |
606 | if (job_control) | |
607 | { | |
608 | #if defined (NEED_POSIX_SETPGID) || defined (HAVE_TERMIOS) | |
609 | /* Do all systems with termios have setpgid? I hope so. */ | |
610 | /* setpgid (0, 0) is supposed to work and mean the same thing as | |
611 | this, but on Ultrix 4.2A it fails with EPERM (and | |
612 | setpgid (getpid (), getpid ()) succeeds). */ | |
613 | retval = setpgid (getpid (), getpid ()); | |
614 | #else | |
615 | #if defined (TIOCGPGRP) | |
616 | #if defined(USG) && !defined(SETPGRP_ARGS) | |
617 | retval = setpgrp (); | |
618 | #else | |
619 | retval = setpgrp (getpid (), getpid ()); | |
620 | #endif /* USG */ | |
621 | #endif /* TIOCGPGRP. */ | |
622 | #endif /* NEED_POSIX_SETPGID */ | |
623 | } | |
624 | return retval; | |
625 | } | |
626 | ||
bd5635a1 RP |
627 | void |
628 | _initialize_inflow () | |
629 | { | |
630 | add_info ("terminal", term_info, | |
631 | "Print inferior's saved terminal status."); | |
632 | ||
bd5635a1 RP |
633 | add_com ("kill", class_run, kill_command, |
634 | "Kill execution of program being debugged."); | |
635 | ||
636 | inferior_pid = 0; | |
637 | ||
bd5635a1 | 638 | terminal_is_ours = 1; |
a14a8fad JK |
639 | |
640 | /* OK, figure out whether we have job control. If neither termios nor | |
641 | sgtty (i.e. termio or go32), leave job_control 0. */ | |
642 | ||
643 | #if defined (HAVE_TERMIOS) | |
644 | /* Do all systems with termios have the POSIX way of identifying job | |
645 | control? I hope so. */ | |
646 | #ifdef _POSIX_JOB_CONTROL | |
647 | job_control = 1; | |
648 | #else | |
649 | job_control = sysconf (_SC_JOB_CONTROL); | |
650 | #endif | |
651 | #endif /* termios */ | |
652 | ||
653 | #ifdef HAVE_SGTTY | |
654 | #ifdef TIOCGPGRP | |
655 | job_control = 1; | |
656 | #else | |
657 | job_control = 0; | |
658 | #endif /* TIOCGPGRP */ | |
659 | #endif /* sgtty */ | |
bd5635a1 | 660 | } |