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 | 27 | #include "target.h" |
199b2450 | 28 | #include "thread.h" |
bd5635a1 | 29 | |
a14a8fad JK |
30 | #include <signal.h> |
31 | #include <fcntl.h> | |
32 | ||
33 | #if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY) && !defined (__GO32__) | |
34 | #define HAVE_SGTTY | |
bd5635a1 RP |
35 | #endif |
36 | ||
a14a8fad JK |
37 | #if defined (HAVE_TERMIOS) |
38 | #include <termios.h> | |
39 | #include <unistd.h> | |
40 | #endif | |
bd5635a1 | 41 | |
a14a8fad JK |
42 | #ifdef HAVE_TERMIOS |
43 | #define PROCESS_GROUP_TYPE pid_t | |
44 | #endif | |
45 | ||
46 | #ifdef HAVE_SGTTY | |
47 | #ifdef SHORT_PGRP | |
48 | /* This is only used for the ultra. Does it have pid_t? */ | |
49 | #define PROCESS_GROUP_TYPE short | |
50 | #else | |
51 | #define PROCESS_GROUP_TYPE int | |
52 | #endif | |
53 | #endif /* sgtty */ | |
bd5635a1 | 54 | |
e676a15f FF |
55 | static void |
56 | kill_command PARAMS ((char *, int)); | |
57 | ||
58 | static void | |
59 | terminal_ours_1 PARAMS ((int)); | |
2a5ec41d | 60 | |
bd5635a1 RP |
61 | /* Nonzero if we are debugging an attached outside process |
62 | rather than an inferior. */ | |
63 | ||
64 | int attach_flag; | |
65 | ||
66 | \f | |
67 | /* Record terminal status separately for debugger and inferior. */ | |
68 | ||
a88797b5 | 69 | static serial_t stdin_serial; |
bd5635a1 | 70 | |
a88797b5 FF |
71 | /* TTY state for the inferior. We save it whenever the inferior stops, and |
72 | restore it when it resumes. */ | |
73 | static serial_ttystate inferior_ttystate; | |
bd5635a1 | 74 | |
a88797b5 FF |
75 | /* Our own tty state, which we restore every time we need to deal with the |
76 | terminal. We only set it once, when GDB first starts. The settings of | |
77 | flags which readline saves and restores and unimportant. */ | |
78 | static serial_ttystate our_ttystate; | |
bd5635a1 | 79 | |
a88797b5 FF |
80 | /* fcntl flags for us and the inferior. Saved and restored just like |
81 | {our,inferior}_ttystate. */ | |
82 | static int tflags_inferior; | |
83 | static int tflags_ours; | |
bd5635a1 | 84 | |
a14a8fad JK |
85 | #ifdef PROCESS_GROUP_TYPE |
86 | /* Process group for us and the inferior. Saved and restored just like | |
87 | {our,inferior}_ttystate. */ | |
88 | PROCESS_GROUP_TYPE our_process_group; | |
89 | PROCESS_GROUP_TYPE inferior_process_group; | |
90 | #endif | |
91 | ||
a88797b5 FF |
92 | /* While the inferior is running, we want SIGINT and SIGQUIT to go to the |
93 | inferior only. If we have job control, that takes care of it. If not, | |
94 | we save our handlers in these two variables and set SIGINT and SIGQUIT | |
95 | to SIG_IGN. */ | |
bd5635a1 RP |
96 | static void (*sigint_ours) (); |
97 | static void (*sigquit_ours) (); | |
bd5635a1 | 98 | |
2a5ec41d JG |
99 | /* The name of the tty (from the `tty' command) that we gave to the inferior |
100 | when it was last started. */ | |
bd5635a1 | 101 | |
2a5ec41d | 102 | static char *inferior_thisrun_terminal; |
bd5635a1 | 103 | |
49781499 JK |
104 | /* Nonzero if our terminal settings are in effect. Zero if the |
105 | inferior's settings are in effect. Ignored if !gdb_has_a_terminal | |
106 | (). */ | |
2a5ec41d | 107 | |
bd5635a1 RP |
108 | static int terminal_is_ours; |
109 | ||
a88797b5 FF |
110 | enum {yes, no, have_not_checked} gdb_has_a_terminal_flag = have_not_checked; |
111 | ||
112 | /* Does GDB have a terminal (on stdin)? */ | |
113 | int | |
114 | gdb_has_a_terminal () | |
115 | { | |
116 | switch (gdb_has_a_terminal_flag) | |
117 | { | |
118 | case yes: | |
119 | return 1; | |
120 | case no: | |
121 | return 0; | |
122 | case have_not_checked: | |
123 | /* Get all the current tty settings (including whether we have a tty at | |
124 | all!). Can't do this in _initialize_inflow because SERIAL_FDOPEN | |
125 | won't work until the serial_ops_list is initialized. */ | |
126 | ||
49781499 | 127 | #ifdef F_GETFL |
a88797b5 | 128 | tflags_ours = fcntl (0, F_GETFL, 0); |
49781499 | 129 | #endif |
a88797b5 FF |
130 | |
131 | gdb_has_a_terminal_flag = no; | |
132 | stdin_serial = SERIAL_FDOPEN (0); | |
133 | if (stdin_serial != NULL) | |
134 | { | |
135 | our_ttystate = SERIAL_GET_TTY_STATE (stdin_serial); | |
a14a8fad | 136 | |
a88797b5 | 137 | if (our_ttystate != NULL) |
a14a8fad JK |
138 | { |
139 | gdb_has_a_terminal_flag = yes; | |
140 | #ifdef HAVE_TERMIOS | |
141 | our_process_group = tcgetpgrp (0); | |
142 | #endif | |
143 | #ifdef HAVE_SGTTY | |
d76eb5f4 | 144 | ioctl (0, TIOCGPGRP, &our_process_group); |
a14a8fad JK |
145 | #endif |
146 | } | |
a88797b5 FF |
147 | } |
148 | ||
149 | return gdb_has_a_terminal_flag == yes; | |
199b2450 TL |
150 | default: |
151 | /* "Can't happen". */ | |
152 | return 0; | |
a88797b5 FF |
153 | } |
154 | } | |
155 | ||
2a5ec41d JG |
156 | /* Macro for printing errors from ioctl operations */ |
157 | ||
158 | #define OOPSY(what) \ | |
159 | if (result == -1) \ | |
199b2450 | 160 | fprintf_unfiltered(gdb_stderr, "[%s failed in terminal_inferior: %s]\n", \ |
2a5ec41d JG |
161 | what, strerror (errno)) |
162 | ||
a88797b5 | 163 | static void terminal_ours_1 PARAMS ((int)); |
2a5ec41d | 164 | |
bd5635a1 RP |
165 | /* Initialize the terminal settings we record for the inferior, |
166 | before we actually run the inferior. */ | |
167 | ||
168 | void | |
169 | terminal_init_inferior () | |
170 | { | |
49781499 JK |
171 | if (gdb_has_a_terminal ()) |
172 | { | |
173 | /* We could just as well copy our_ttystate (if we felt like adding | |
174 | a new function SERIAL_COPY_TTY_STATE). */ | |
175 | if (inferior_ttystate) | |
176 | free (inferior_ttystate); | |
177 | inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial); | |
a14a8fad JK |
178 | #ifdef PROCESS_GROUP_TYPE |
179 | inferior_process_group = inferior_pid; | |
180 | #endif | |
49781499 JK |
181 | |
182 | /* Make sure that next time we call terminal_inferior (which will be | |
183 | before the program runs, as it needs to be), we install the new | |
184 | process group. */ | |
185 | terminal_is_ours = 1; | |
186 | } | |
bd5635a1 RP |
187 | } |
188 | ||
189 | /* Put the inferior's terminal settings into effect. | |
190 | This is preparation for starting or resuming the inferior. */ | |
191 | ||
192 | void | |
193 | terminal_inferior () | |
194 | { | |
a88797b5 FF |
195 | if (gdb_has_a_terminal () && terminal_is_ours |
196 | && inferior_thisrun_terminal == 0) | |
bd5635a1 | 197 | { |
a88797b5 FF |
198 | int result; |
199 | ||
49781499 | 200 | #ifdef F_GETFL |
a88797b5 FF |
201 | /* Is there a reason this is being done twice? It happens both |
202 | places we use F_SETFL, so I'm inclined to think perhaps there | |
203 | is some reason, however perverse. Perhaps not though... */ | |
2a5ec41d JG |
204 | result = fcntl (0, F_SETFL, tflags_inferior); |
205 | result = fcntl (0, F_SETFL, tflags_inferior); | |
206 | OOPSY ("fcntl F_SETFL"); | |
49781499 | 207 | #endif |
bd5635a1 | 208 | |
a88797b5 FF |
209 | /* Because we were careful to not change in or out of raw mode in |
210 | terminal_ours, we will not change in our out of raw mode with | |
211 | this call, so we don't flush any input. */ | |
212 | result = SERIAL_SET_TTY_STATE (stdin_serial, inferior_ttystate); | |
a14a8fad JK |
213 | OOPSY ("setting tty state"); |
214 | ||
215 | if (!job_control) | |
216 | { | |
217 | sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN); | |
218 | sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN); | |
219 | } | |
a88797b5 FF |
220 | |
221 | /* If attach_flag is set, we don't know whether we are sharing a | |
222 | terminal with the inferior or not. (attaching a process | |
223 | without a terminal is one case where we do not; attaching a | |
224 | process which we ran from the same shell as GDB via `&' is | |
225 | one case where we do, I think (but perhaps this is not | |
226 | `sharing' in the sense that we need to save and restore tty | |
227 | state)). I don't know if there is any way to tell whether we | |
228 | are sharing a terminal. So what we do is to go through all | |
a14a8fad JK |
229 | the saving and restoring of the tty state, but ignore errors |
230 | setting the process group, which will happen if we are not | |
231 | sharing a terminal). */ | |
a88797b5 | 232 | |
a14a8fad | 233 | if (job_control) |
a88797b5 | 234 | { |
a14a8fad JK |
235 | #ifdef HAVE_TERMIOS |
236 | result = tcsetpgrp (0, inferior_process_group); | |
237 | if (!attach_flag) | |
238 | OOPSY ("tcsetpgrp"); | |
239 | #endif | |
240 | ||
241 | #ifdef HAVE_SGTTY | |
179cd923 | 242 | result = ioctl (0, TIOCSPGRP, &inferior_process_group); |
a14a8fad JK |
243 | if (!attach_flag) |
244 | OOPSY ("TIOCSPGRP"); | |
245 | #endif | |
a88797b5 | 246 | } |
a14a8fad | 247 | |
bd5635a1 RP |
248 | } |
249 | terminal_is_ours = 0; | |
250 | } | |
251 | ||
252 | /* Put some of our terminal settings into effect, | |
253 | enough to get proper results from our output, | |
254 | but do not change into or out of RAW mode | |
255 | so that no input is discarded. | |
256 | ||
257 | After doing this, either terminal_ours or terminal_inferior | |
258 | should be called to get back to a normal state of affairs. */ | |
259 | ||
260 | void | |
261 | terminal_ours_for_output () | |
262 | { | |
263 | terminal_ours_1 (1); | |
264 | } | |
265 | ||
266 | /* Put our terminal settings into effect. | |
267 | First record the inferior's terminal settings | |
268 | so they can be restored properly later. */ | |
269 | ||
270 | void | |
271 | terminal_ours () | |
272 | { | |
273 | terminal_ours_1 (0); | |
274 | } | |
275 | ||
a88797b5 FF |
276 | /* output_only is not used, and should not be used unless we introduce |
277 | separate terminal_is_ours and terminal_is_ours_for_output | |
278 | flags. */ | |
279 | ||
bd5635a1 RP |
280 | static void |
281 | terminal_ours_1 (output_only) | |
282 | int output_only; | |
283 | { | |
2a5ec41d | 284 | /* Checking inferior_thisrun_terminal is necessary so that |
bd5635a1 | 285 | if GDB is running in the background, it won't block trying |
2a5ec41d JG |
286 | to do the ioctl()'s below. Checking gdb_has_a_terminal |
287 | avoids attempting all the ioctl's when running in batch. */ | |
a88797b5 | 288 | if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal () == 0) |
bd5635a1 RP |
289 | return; |
290 | ||
291 | if (!terminal_is_ours) | |
292 | { | |
a88797b5 FF |
293 | /* Ignore this signal since it will happen when we try to set the |
294 | pgrp. */ | |
295 | void (*osigttou) (); | |
296 | int result; | |
297 | ||
bd5635a1 RP |
298 | terminal_is_ours = 1; |
299 | ||
a88797b5 FF |
300 | #ifdef SIGTTOU |
301 | if (job_control) | |
302 | osigttou = (void (*) ()) signal (SIGTTOU, SIG_IGN); | |
303 | #endif | |
bd5635a1 | 304 | |
a88797b5 FF |
305 | if (inferior_ttystate) |
306 | free (inferior_ttystate); | |
307 | inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial); | |
a14a8fad JK |
308 | #ifdef HAVE_TERMIOS |
309 | inferior_process_group = tcgetpgrp (0); | |
310 | #endif | |
311 | #ifdef HAVE_SGTTY | |
d76eb5f4 | 312 | ioctl (0, TIOCGPGRP, &inferior_process_group); |
a14a8fad | 313 | #endif |
bd5635a1 | 314 | |
a88797b5 FF |
315 | /* Here we used to set ICANON in our ttystate, but I believe this |
316 | was an artifact from before when we used readline. Readline sets | |
317 | the tty state when it needs to. */ | |
bd5635a1 | 318 | |
a88797b5 FF |
319 | /* Set tty state to our_ttystate. We don't change in our out of raw |
320 | mode, to avoid flushing input. We need to do the same thing | |
321 | regardless of output_only, because we don't have separate | |
322 | terminal_is_ours and terminal_is_ours_for_output flags. It's OK, | |
323 | though, since readline will deal with raw mode when/if it needs to. | |
324 | */ | |
325 | SERIAL_NOFLUSH_SET_TTY_STATE (stdin_serial, our_ttystate, | |
326 | inferior_ttystate); | |
bd5635a1 | 327 | |
a14a8fad JK |
328 | if (job_control) |
329 | { | |
330 | #ifdef HAVE_TERMIOS | |
331 | result = tcsetpgrp (0, our_process_group); | |
76e473bb JK |
332 | #if 0 |
333 | /* This fails on Ultrix with EINVAL if you run the testsuite | |
334 | in the background with nohup, and then log out. GDB never | |
335 | used to check for an error here, so perhaps there are other | |
336 | such situations as well. */ | |
d76eb5f4 | 337 | if (result == -1) |
199b2450 | 338 | fprintf_unfiltered (gdb_stderr, "[tcsetpgrp failed in terminal_ours: %s]\n", |
d76eb5f4 | 339 | strerror (errno)); |
a14a8fad | 340 | #endif |
76e473bb | 341 | #endif /* termios */ |
a14a8fad JK |
342 | |
343 | #ifdef HAVE_SGTTY | |
179cd923 | 344 | result = ioctl (0, TIOCSPGRP, &our_process_group); |
a14a8fad JK |
345 | #endif |
346 | } | |
347 | ||
a88797b5 FF |
348 | #ifdef SIGTTOU |
349 | if (job_control) | |
350 | signal (SIGTTOU, osigttou); | |
bd5635a1 | 351 | #endif |
bd5635a1 | 352 | |
a88797b5 FF |
353 | if (!job_control) |
354 | { | |
355 | signal (SIGINT, sigint_ours); | |
356 | signal (SIGQUIT, sigquit_ours); | |
357 | } | |
bd5635a1 | 358 | |
49781499 | 359 | #ifdef F_GETFL |
a88797b5 | 360 | tflags_inferior = fcntl (0, F_GETFL, 0); |
e676a15f | 361 | |
a88797b5 FF |
362 | /* Is there a reason this is being done twice? It happens both |
363 | places we use F_SETFL, so I'm inclined to think perhaps there | |
364 | is some reason, however perverse. Perhaps not though... */ | |
365 | result = fcntl (0, F_SETFL, tflags_ours); | |
366 | result = fcntl (0, F_SETFL, tflags_ours); | |
49781499 | 367 | #endif |
a88797b5 FF |
368 | |
369 | result = result; /* lint */ | |
370 | } | |
bd5635a1 RP |
371 | } |
372 | ||
373 | /* ARGSUSED */ | |
374 | void | |
375 | term_info (arg, from_tty) | |
376 | char *arg; | |
377 | int from_tty; | |
378 | { | |
379 | target_terminal_info (arg, from_tty); | |
380 | } | |
381 | ||
715d2e06 | 382 | /* ARGSUSED */ |
bd5635a1 RP |
383 | void |
384 | child_terminal_info (args, from_tty) | |
385 | char *args; | |
386 | int from_tty; | |
387 | { | |
a88797b5 FF |
388 | if (!gdb_has_a_terminal ()) |
389 | { | |
390 | printf_filtered ("This GDB does not control a terminal.\n"); | |
391 | return; | |
392 | } | |
bd5635a1 RP |
393 | |
394 | printf_filtered ("Inferior's terminal status (currently saved by GDB):\n"); | |
395 | ||
a88797b5 FF |
396 | /* First the fcntl flags. */ |
397 | { | |
398 | int flags; | |
399 | ||
400 | flags = tflags_inferior; | |
bd5635a1 | 401 | |
a88797b5 | 402 | printf_filtered ("File descriptor flags = "); |
bd5635a1 | 403 | |
a88797b5 FF |
404 | #ifndef O_ACCMODE |
405 | #define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR) | |
bd5635a1 | 406 | #endif |
a88797b5 FF |
407 | /* (O_ACCMODE) parens are to avoid Ultrix header file bug */ |
408 | switch (flags & (O_ACCMODE)) | |
409 | { | |
410 | case O_RDONLY: printf_filtered ("O_RDONLY"); break; | |
411 | case O_WRONLY: printf_filtered ("O_WRONLY"); break; | |
412 | case O_RDWR: printf_filtered ("O_RDWR"); break; | |
413 | } | |
414 | flags &= ~(O_ACCMODE); | |
bd5635a1 | 415 | |
a88797b5 FF |
416 | #ifdef O_NONBLOCK |
417 | if (flags & O_NONBLOCK) | |
418 | printf_filtered (" | O_NONBLOCK"); | |
419 | flags &= ~O_NONBLOCK; | |
bd5635a1 | 420 | #endif |
a88797b5 FF |
421 | |
422 | #if defined (O_NDELAY) | |
423 | /* If O_NDELAY and O_NONBLOCK are defined to the same thing, we will | |
424 | print it as O_NONBLOCK, which is good cause that is what POSIX | |
425 | has, and the flag will already be cleared by the time we get here. */ | |
426 | if (flags & O_NDELAY) | |
427 | printf_filtered (" | O_NDELAY"); | |
428 | flags &= ~O_NDELAY; | |
bd5635a1 | 429 | #endif |
a88797b5 FF |
430 | |
431 | if (flags & O_APPEND) | |
432 | printf_filtered (" | O_APPEND"); | |
433 | flags &= ~O_APPEND; | |
434 | ||
435 | #if defined (O_BINARY) | |
436 | if (flags & O_BINARY) | |
437 | printf_filtered (" | O_BINARY"); | |
438 | flags &= ~O_BINARY; | |
e676a15f FF |
439 | #endif |
440 | ||
a88797b5 FF |
441 | if (flags) |
442 | printf_filtered (" | 0x%x", flags); | |
443 | printf_filtered ("\n"); | |
444 | } | |
445 | ||
a14a8fad JK |
446 | #ifdef PROCESS_GROUP_TYPE |
447 | printf_filtered ("Process group = %d\n", inferior_process_group); | |
448 | #endif | |
449 | ||
a88797b5 | 450 | SERIAL_PRINT_TTY_STATE (stdin_serial, inferior_ttystate); |
bd5635a1 RP |
451 | } |
452 | \f | |
715d2e06 JG |
453 | /* NEW_TTY_PREFORK is called before forking a new child process, |
454 | so we can record the state of ttys in the child to be formed. | |
455 | TTYNAME is null if we are to share the terminal with gdb; | |
456 | or points to a string containing the name of the desired tty. | |
bd5635a1 | 457 | |
715d2e06 JG |
458 | NEW_TTY is called in new child processes under Unix, which will |
459 | become debugger target processes. This actually switches to | |
460 | the terminal specified in the NEW_TTY_PREFORK call. */ | |
461 | ||
7d9884b9 | 462 | void |
715d2e06 | 463 | new_tty_prefork (ttyname) |
bd5635a1 RP |
464 | char *ttyname; |
465 | { | |
bd5635a1 RP |
466 | /* Save the name for later, for determining whether we and the child |
467 | are sharing a tty. */ | |
468 | inferior_thisrun_terminal = ttyname; | |
715d2e06 JG |
469 | } |
470 | ||
471 | void | |
472 | new_tty () | |
473 | { | |
474 | register int tty; | |
475 | ||
476 | if (inferior_thisrun_terminal == 0) | |
bd5635a1 | 477 | return; |
e676a15f | 478 | #if !defined(__GO32__) |
bd5635a1 | 479 | #ifdef TIOCNOTTY |
e676a15f FF |
480 | /* Disconnect the child process from our controlling terminal. On some |
481 | systems (SVR4 for example), this may cause a SIGTTOU, so temporarily | |
482 | ignore SIGTTOU. */ | |
bd5635a1 RP |
483 | tty = open("/dev/tty", O_RDWR); |
484 | if (tty > 0) | |
485 | { | |
49781499 JK |
486 | void (*osigttou) (); |
487 | ||
e676a15f | 488 | osigttou = (void (*)()) signal(SIGTTOU, SIG_IGN); |
bd5635a1 RP |
489 | ioctl(tty, TIOCNOTTY, 0); |
490 | close(tty); | |
a88797b5 | 491 | signal(SIGTTOU, osigttou); |
bd5635a1 RP |
492 | } |
493 | #endif | |
494 | ||
495 | /* Now open the specified new terminal. */ | |
496 | ||
7d9884b9 JG |
497 | #ifdef USE_O_NOCTTY |
498 | tty = open(inferior_thisrun_terminal, O_RDWR | O_NOCTTY); | |
499 | #else | |
715d2e06 | 500 | tty = open(inferior_thisrun_terminal, O_RDWR); |
7d9884b9 | 501 | #endif |
bd5635a1 RP |
502 | if (tty == -1) |
503 | { | |
715d2e06 | 504 | print_sys_errmsg (inferior_thisrun_terminal, errno); |
bd5635a1 RP |
505 | _exit(1); |
506 | } | |
507 | ||
508 | /* Avoid use of dup2; doesn't exist on all systems. */ | |
509 | if (tty != 0) | |
510 | { close (0); dup (tty); } | |
511 | if (tty != 1) | |
512 | { close (1); dup (tty); } | |
513 | if (tty != 2) | |
514 | { close (2); dup (tty); } | |
515 | if (tty > 2) | |
516 | close(tty); | |
a88797b5 | 517 | #endif /* !go32 */ |
bd5635a1 RP |
518 | } |
519 | \f | |
520 | /* Kill the inferior process. Make us have no inferior. */ | |
521 | ||
522 | /* ARGSUSED */ | |
523 | static void | |
524 | kill_command (arg, from_tty) | |
525 | char *arg; | |
526 | int from_tty; | |
527 | { | |
a88797b5 | 528 | /* Shouldn't this be target_has_execution? FIXME. */ |
bd5635a1 RP |
529 | if (inferior_pid == 0) |
530 | error ("The program is not being run."); | |
a88797b5 | 531 | if (!query ("Kill the program being debugged? ")) |
bd5635a1 | 532 | error ("Not confirmed."); |
ee0613d1 | 533 | target_kill (); |
777bef06 | 534 | |
199b2450 TL |
535 | init_thread_list(); /* Destroy thread info */ |
536 | ||
777bef06 JK |
537 | /* Killing off the inferior can leave us with a core file. If so, |
538 | print the state we are left in. */ | |
539 | if (target_has_stack) { | |
540 | printf_filtered ("In %s,\n", current_target->to_longname); | |
541 | if (selected_frame == NULL) | |
199b2450 | 542 | fputs_filtered ("No selected stack frame.\n", gdb_stdout); |
777bef06 | 543 | else |
cadbb07a | 544 | print_stack_frame (selected_frame, selected_frame_level, 1); |
777bef06 | 545 | } |
bd5635a1 RP |
546 | } |
547 | ||
548 | /* The inferior process has died. Long live the inferior! */ | |
549 | ||
550 | void | |
551 | generic_mourn_inferior () | |
552 | { | |
553 | inferior_pid = 0; | |
554 | attach_flag = 0; | |
cf3e377e | 555 | breakpoint_init_inferior (); |
bd5635a1 RP |
556 | registers_changed (); |
557 | ||
558 | #ifdef CLEAR_DEFERRED_STORES | |
559 | /* Delete any pending stores to the inferior... */ | |
560 | CLEAR_DEFERRED_STORES; | |
561 | #endif | |
562 | ||
bd5635a1 | 563 | reopen_exec_file (); |
cf3e377e JK |
564 | reinit_frame_cache (); |
565 | ||
bd5635a1 RP |
566 | /* It is confusing to the user for ignore counts to stick around |
567 | from previous runs of the inferior. So clear them. */ | |
568 | breakpoint_clear_ignore_counts (); | |
569 | } | |
bd5635a1 | 570 | \f |
a88797b5 FF |
571 | /* Call set_sigint_trap when you need to pass a signal on to an attached |
572 | process when handling SIGINT */ | |
573 | ||
bd5635a1 RP |
574 | /* ARGSUSED */ |
575 | static void | |
a88797b5 FF |
576 | pass_signal (signo) |
577 | int signo; | |
bd5635a1 | 578 | { |
a88797b5 FF |
579 | kill (inferior_pid, SIGINT); |
580 | } | |
bd5635a1 | 581 | |
a88797b5 FF |
582 | static void (*osig)(); |
583 | ||
584 | void | |
585 | set_sigint_trap() | |
586 | { | |
587 | osig = (void (*) ()) signal (SIGINT, pass_signal); | |
588 | } | |
589 | ||
590 | void | |
591 | clear_sigint_trap() | |
592 | { | |
593 | signal (SIGINT, osig); | |
bd5635a1 | 594 | } |
bd5635a1 | 595 | \f |
a14a8fad JK |
596 | |
597 | int job_control; | |
598 | ||
599 | /* This is here because this is where we figure out whether we (probably) | |
600 | have job control. Just using job_control only does part of it because | |
601 | setpgid or setpgrp might not exist on a system without job control. | |
602 | It might be considered misplaced (on the other hand, process groups and | |
603 | job control are closely related to ttys). | |
604 | ||
605 | For a more clean implementation, in libiberty, put a setpgid which merely | |
606 | calls setpgrp and a setpgrp which does nothing (any system with job control | |
607 | will have one or the other). */ | |
608 | int | |
609 | gdb_setpgid () | |
610 | { | |
611 | int retval = 0; | |
612 | if (job_control) | |
613 | { | |
614 | #if defined (NEED_POSIX_SETPGID) || defined (HAVE_TERMIOS) | |
615 | /* Do all systems with termios have setpgid? I hope so. */ | |
616 | /* setpgid (0, 0) is supposed to work and mean the same thing as | |
617 | this, but on Ultrix 4.2A it fails with EPERM (and | |
618 | setpgid (getpid (), getpid ()) succeeds). */ | |
619 | retval = setpgid (getpid (), getpid ()); | |
620 | #else | |
621 | #if defined (TIOCGPGRP) | |
622 | #if defined(USG) && !defined(SETPGRP_ARGS) | |
623 | retval = setpgrp (); | |
624 | #else | |
625 | retval = setpgrp (getpid (), getpid ()); | |
626 | #endif /* USG */ | |
627 | #endif /* TIOCGPGRP. */ | |
628 | #endif /* NEED_POSIX_SETPGID */ | |
629 | } | |
630 | return retval; | |
631 | } | |
632 | ||
bd5635a1 RP |
633 | void |
634 | _initialize_inflow () | |
635 | { | |
636 | add_info ("terminal", term_info, | |
637 | "Print inferior's saved terminal status."); | |
638 | ||
bd5635a1 RP |
639 | add_com ("kill", class_run, kill_command, |
640 | "Kill execution of program being debugged."); | |
641 | ||
642 | inferior_pid = 0; | |
643 | ||
bd5635a1 | 644 | terminal_is_ours = 1; |
a14a8fad JK |
645 | |
646 | /* OK, figure out whether we have job control. If neither termios nor | |
647 | sgtty (i.e. termio or go32), leave job_control 0. */ | |
648 | ||
649 | #if defined (HAVE_TERMIOS) | |
650 | /* Do all systems with termios have the POSIX way of identifying job | |
651 | control? I hope so. */ | |
652 | #ifdef _POSIX_JOB_CONTROL | |
653 | job_control = 1; | |
654 | #else | |
655 | job_control = sysconf (_SC_JOB_CONTROL); | |
656 | #endif | |
657 | #endif /* termios */ | |
658 | ||
659 | #ifdef HAVE_SGTTY | |
660 | #ifdef TIOCGPGRP | |
661 | job_control = 1; | |
662 | #else | |
663 | job_control = 0; | |
664 | #endif /* TIOCGPGRP */ | |
665 | #endif /* sgtty */ | |
bd5635a1 | 666 | } |