28d00fe4 |
1 | /* |
2 | * Pseudo-tty backend for pterm. |
28d00fe4 |
3 | */ |
4 | |
74aca06d |
5 | #define _GNU_SOURCE |
054d8535 |
6 | |
1709795f |
7 | #include <stdio.h> |
8 | #include <stdlib.h> |
054d8535 |
9 | #include <string.h> |
10 | #include <unistd.h> |
a0e16eb1 |
11 | #include <signal.h> |
2916fa14 |
12 | #include <assert.h> |
054d8535 |
13 | #include <fcntl.h> |
88e6b9ca |
14 | #include <termios.h> |
be4f86de |
15 | #include <grp.h> |
755a6d84 |
16 | #include <utmp.h> |
17 | #include <pwd.h> |
18 | #include <time.h> |
a0e16eb1 |
19 | #include <sys/types.h> |
d4e1d591 |
20 | #include <sys/stat.h> |
a0e16eb1 |
21 | #include <sys/wait.h> |
88e6b9ca |
22 | #include <sys/ioctl.h> |
0f33f9d1 |
23 | #include <errno.h> |
1709795f |
24 | |
25 | #include "putty.h" |
d6fa1947 |
26 | #include "tree234.h" |
1709795f |
27 | |
0b1df797 |
28 | #ifndef OMIT_UTMP |
bea25c48 |
29 | #include <utmpx.h> |
30 | #endif |
31 | |
1709795f |
32 | #ifndef FALSE |
33 | #define FALSE 0 |
34 | #endif |
35 | #ifndef TRUE |
36 | #define TRUE 1 |
37 | #endif |
38 | |
bea25c48 |
39 | /* updwtmpx() needs the name of the wtmp file. Try to find it. */ |
40 | #ifndef WTMPX_FILE |
41 | #ifdef _PATH_WTMPX |
42 | #define WTMPX_FILE _PATH_WTMPX |
43 | #else |
44 | #define WTMPX_FILE "/var/log/wtmpx" |
755a6d84 |
45 | #endif |
755a6d84 |
46 | #endif |
bea25c48 |
47 | |
755a6d84 |
48 | #ifndef LASTLOG_FILE |
49 | #ifdef _PATH_LASTLOG |
50 | #define LASTLOG_FILE _PATH_LASTLOG |
51 | #else |
52 | #define LASTLOG_FILE "/var/log/lastlog" |
53 | #endif |
54 | #endif |
55 | |
f51dc031 |
56 | /* |
57 | * Set up a default for vaguely sane systems. The idea is that if |
58 | * OMIT_UTMP is not defined, then at least one of the symbols which |
59 | * enable particular forms of utmp processing should be, if only so |
60 | * that a link error can warn you that you should have defined |
61 | * OMIT_UTMP if you didn't want any. Currently HAVE_PUTUTLINE is |
62 | * the only such symbol. |
63 | */ |
64 | #ifndef OMIT_UTMP |
65 | #if !defined HAVE_PUTUTLINE |
66 | #define HAVE_PUTUTLINE |
67 | #endif |
68 | #endif |
69 | |
d6fa1947 |
70 | typedef struct pty_tag *Pty; |
71 | |
72 | /* |
73 | * The pty_signal_pipe, along with the SIGCHLD handler, must be |
74 | * process-global rather than session-specific. |
75 | */ |
76 | static int pty_signal_pipe[2] = { -1, -1 }; /* obviously bogus initial val */ |
77 | |
78 | struct pty_tag { |
4a693cfc |
79 | Conf *conf; |
d6fa1947 |
80 | int master_fd, slave_fd; |
81 | void *frontend; |
82 | char name[FILENAME_MAX]; |
115393d8 |
83 | pid_t child_pid; |
d6fa1947 |
84 | int term_width, term_height; |
85 | int child_dead, finished; |
86 | int exit_code; |
2916fa14 |
87 | bufchain output_data; |
d6fa1947 |
88 | }; |
89 | |
90 | /* |
91 | * We store our pty backends in a tree sorted by master fd, so that |
92 | * when we get an uxsel notification we know which backend instance |
93 | * is the owner of the pty that caused it. |
94 | */ |
95 | static int pty_compare_by_fd(void *av, void *bv) |
96 | { |
97 | Pty a = (Pty)av; |
98 | Pty b = (Pty)bv; |
99 | |
100 | if (a->master_fd < b->master_fd) |
101 | return -1; |
102 | else if (a->master_fd > b->master_fd) |
103 | return +1; |
104 | return 0; |
105 | } |
106 | |
107 | static int pty_find_by_fd(void *av, void *bv) |
108 | { |
109 | int a = *(int *)av; |
110 | Pty b = (Pty)bv; |
111 | |
112 | if (a < b->master_fd) |
113 | return -1; |
114 | else if (a > b->master_fd) |
115 | return +1; |
116 | return 0; |
117 | } |
054d8535 |
118 | |
d6fa1947 |
119 | static tree234 *ptys_by_fd = NULL; |
120 | |
121 | /* |
122 | * We also have a tree sorted by child pid, so that when we wait() |
123 | * in response to the signal we know which backend instance is the |
124 | * owner of the process that caused the signal. |
125 | */ |
126 | static int pty_compare_by_pid(void *av, void *bv) |
127 | { |
128 | Pty a = (Pty)av; |
129 | Pty b = (Pty)bv; |
130 | |
131 | if (a->child_pid < b->child_pid) |
132 | return -1; |
133 | else if (a->child_pid > b->child_pid) |
134 | return +1; |
135 | return 0; |
136 | } |
137 | |
138 | static int pty_find_by_pid(void *av, void *bv) |
139 | { |
115393d8 |
140 | pid_t a = *(pid_t *)av; |
d6fa1947 |
141 | Pty b = (Pty)bv; |
142 | |
143 | if (a < b->child_pid) |
144 | return -1; |
145 | else if (a > b->child_pid) |
146 | return +1; |
147 | return 0; |
148 | } |
149 | |
150 | static tree234 *ptys_by_pid = NULL; |
151 | |
152 | /* |
153 | * If we are using pty_pre_init(), it will need to have already |
154 | * allocated a pty structure, which we must then return from |
155 | * pty_init() rather than allocating a new one. Here we store that |
156 | * structure between allocation and use. |
157 | * |
158 | * Note that although most of this module is entirely capable of |
159 | * handling multiple ptys in a single process, pty_pre_init() is |
160 | * fundamentally _dependent_ on there being at most one pty per |
161 | * process, so the normal static-data constraints don't apply. |
162 | * |
163 | * Likewise, since utmp is only used via pty_pre_init, it too must |
164 | * be single-instance, so we can declare utmp-related variables |
165 | * here. |
166 | */ |
167 | static Pty single_pty = NULL; |
74aca06d |
168 | |
d4e1d591 |
169 | #ifndef OMIT_UTMP |
dd5517cb |
170 | static pid_t pty_utmp_helper_pid = -1; |
171 | static int pty_utmp_helper_pipe = -1; |
d6fa1947 |
172 | static int pty_stamped_utmp; |
bea25c48 |
173 | static struct utmpx utmp_entry; |
d6fa1947 |
174 | #endif |
175 | |
176 | /* |
177 | * pty_argv is a grievous hack to allow a proper argv to be passed |
178 | * through from the Unix command line. Again, it doesn't really |
179 | * make sense outside a one-pty-per-process setup. |
180 | */ |
181 | char **pty_argv; |
d6fa1947 |
182 | |
183 | static void pty_close(Pty pty); |
2916fa14 |
184 | static void pty_try_write(Pty pty); |
d4e1d591 |
185 | |
d6fa1947 |
186 | #ifndef OMIT_UTMP |
95c47834 |
187 | static void setup_utmp(char *ttyname, char *location) |
755a6d84 |
188 | { |
755a6d84 |
189 | #ifdef HAVE_LASTLOG |
190 | struct lastlog lastlog_entry; |
191 | FILE *lastlog; |
192 | #endif |
193 | struct passwd *pw; |
bea25c48 |
194 | struct timeval tv; |
755a6d84 |
195 | |
196 | pw = getpwuid(getuid()); |
197 | memset(&utmp_entry, 0, sizeof(utmp_entry)); |
198 | utmp_entry.ut_type = USER_PROCESS; |
199 | utmp_entry.ut_pid = getpid(); |
200 | strncpy(utmp_entry.ut_line, ttyname+5, lenof(utmp_entry.ut_line)); |
201 | strncpy(utmp_entry.ut_id, ttyname+8, lenof(utmp_entry.ut_id)); |
202 | strncpy(utmp_entry.ut_user, pw->pw_name, lenof(utmp_entry.ut_user)); |
203 | strncpy(utmp_entry.ut_host, location, lenof(utmp_entry.ut_host)); |
bea25c48 |
204 | /* |
205 | * Apparently there are some architectures where (struct |
206 | * utmpx).ut_tv is not essentially struct timeval (e.g. Linux |
207 | * amd64). Hence the temporary. |
208 | */ |
209 | gettimeofday(&tv, NULL); |
210 | utmp_entry.ut_tv.tv_sec = tv.tv_sec; |
211 | utmp_entry.ut_tv.tv_usec = tv.tv_usec; |
755a6d84 |
212 | |
bea25c48 |
213 | setutxent(); |
214 | pututxline(&utmp_entry); |
215 | endutxent(); |
216 | |
217 | updwtmpx(WTMPX_FILE, &utmp_entry); |
755a6d84 |
218 | |
219 | #ifdef HAVE_LASTLOG |
220 | memset(&lastlog_entry, 0, sizeof(lastlog_entry)); |
221 | strncpy(lastlog_entry.ll_line, ttyname+5, lenof(lastlog_entry.ll_line)); |
222 | strncpy(lastlog_entry.ll_host, location, lenof(lastlog_entry.ll_host)); |
223 | time(&lastlog_entry.ll_time); |
224 | if ((lastlog = fopen(LASTLOG_FILE, "r+")) != NULL) { |
225 | fseek(lastlog, sizeof(lastlog_entry) * getuid(), SEEK_SET); |
226 | fwrite(&lastlog_entry, 1, sizeof(lastlog_entry), lastlog); |
227 | fclose(lastlog); |
228 | } |
229 | #endif |
230 | |
f51dc031 |
231 | pty_stamped_utmp = 1; |
232 | |
755a6d84 |
233 | } |
234 | |
235 | static void cleanup_utmp(void) |
236 | { |
bea25c48 |
237 | struct timeval tv; |
755a6d84 |
238 | |
95c47834 |
239 | if (!pty_stamped_utmp) |
f51dc031 |
240 | return; |
241 | |
755a6d84 |
242 | utmp_entry.ut_type = DEAD_PROCESS; |
243 | memset(utmp_entry.ut_user, 0, lenof(utmp_entry.ut_user)); |
bea25c48 |
244 | gettimeofday(&tv, NULL); |
245 | utmp_entry.ut_tv.tv_sec = tv.tv_sec; |
246 | utmp_entry.ut_tv.tv_usec = tv.tv_usec; |
755a6d84 |
247 | |
bea25c48 |
248 | updwtmpx(WTMPX_FILE, &utmp_entry); |
755a6d84 |
249 | |
250 | memset(utmp_entry.ut_line, 0, lenof(utmp_entry.ut_line)); |
bea25c48 |
251 | utmp_entry.ut_tv.tv_sec = 0; |
252 | utmp_entry.ut_tv.tv_usec = 0; |
755a6d84 |
253 | |
bea25c48 |
254 | setutxent(); |
255 | pututxline(&utmp_entry); |
256 | endutxent(); |
755a6d84 |
257 | |
f51dc031 |
258 | pty_stamped_utmp = 0; /* ensure we never double-cleanup */ |
755a6d84 |
259 | } |
d4e1d591 |
260 | #endif |
755a6d84 |
261 | |
a0e16eb1 |
262 | static void sigchld_handler(int signum) |
263 | { |
ecb25722 |
264 | if (write(pty_signal_pipe[1], "x", 1) <= 0) |
265 | /* not much we can do about it */; |
a0e16eb1 |
266 | } |
267 | |
d4e1d591 |
268 | #ifndef OMIT_UTMP |
755a6d84 |
269 | static void fatal_sig_handler(int signum) |
270 | { |
0f33f9d1 |
271 | putty_signal(signum, SIG_DFL); |
755a6d84 |
272 | cleanup_utmp(); |
273 | setuid(getuid()); |
274 | raise(signum); |
275 | } |
d4e1d591 |
276 | #endif |
755a6d84 |
277 | |
d6fa1947 |
278 | static int pty_open_slave(Pty pty) |
270d2e8d |
279 | { |
89e97516 |
280 | if (pty->slave_fd < 0) { |
d6fa1947 |
281 | pty->slave_fd = open(pty->name, O_RDWR); |
db9b7dce |
282 | cloexec(pty->slave_fd); |
89e97516 |
283 | } |
270d2e8d |
284 | |
d6fa1947 |
285 | return pty->slave_fd; |
270d2e8d |
286 | } |
287 | |
d6fa1947 |
288 | static void pty_open_master(Pty pty) |
1709795f |
289 | { |
be4f86de |
290 | #ifdef BSD_PTYS |
95c47834 |
291 | const char chars1[] = "pqrstuvwxyz"; |
292 | const char chars2[] = "0123456789abcdef"; |
293 | const char *p1, *p2; |
294 | char master_name[20]; |
295 | struct group *gp; |
296 | |
297 | for (p1 = chars1; *p1; p1++) |
298 | for (p2 = chars2; *p2; p2++) { |
299 | sprintf(master_name, "/dev/pty%c%c", *p1, *p2); |
d6fa1947 |
300 | pty->master_fd = open(master_name, O_RDWR); |
301 | if (pty->master_fd >= 0) { |
95c47834 |
302 | if (geteuid() == 0 || |
270d2e8d |
303 | access(master_name, R_OK | W_OK) == 0) { |
304 | /* |
305 | * We must also check at this point that we are |
306 | * able to open the slave side of the pty. We |
307 | * wouldn't want to allocate the wrong master, |
308 | * get all the way down to forking, and _then_ |
309 | * find we're unable to open the slave. |
310 | */ |
d6fa1947 |
311 | strcpy(pty->name, master_name); |
312 | pty->name[5] = 't'; /* /dev/ptyXX -> /dev/ttyXX */ |
270d2e8d |
313 | |
db9b7dce |
314 | cloexec(pty->master_fd); |
89e97516 |
315 | |
d6fa1947 |
316 | if (pty_open_slave(pty) >= 0 && |
317 | access(pty->name, R_OK | W_OK) == 0) |
270d2e8d |
318 | goto got_one; |
d6fa1947 |
319 | if (pty->slave_fd > 0) |
320 | close(pty->slave_fd); |
321 | pty->slave_fd = -1; |
270d2e8d |
322 | } |
d6fa1947 |
323 | close(pty->master_fd); |
be4f86de |
324 | } |
95c47834 |
325 | } |
be4f86de |
326 | |
95c47834 |
327 | /* If we get here, we couldn't get a tty at all. */ |
328 | fprintf(stderr, "pterm: unable to open a pseudo-terminal device\n"); |
329 | exit(1); |
be4f86de |
330 | |
95c47834 |
331 | got_one: |
95c47834 |
332 | |
333 | /* We need to chown/chmod the /dev/ttyXX device. */ |
334 | gp = getgrnam("tty"); |
d6fa1947 |
335 | chown(pty->name, getuid(), gp ? gp->gr_gid : -1); |
336 | chmod(pty->name, 0600); |
be4f86de |
337 | #else |
d6fa1947 |
338 | pty->master_fd = open("/dev/ptmx", O_RDWR); |
054d8535 |
339 | |
d6fa1947 |
340 | if (pty->master_fd < 0) { |
054d8535 |
341 | perror("/dev/ptmx: open"); |
342 | exit(1); |
343 | } |
344 | |
d6fa1947 |
345 | if (grantpt(pty->master_fd) < 0) { |
054d8535 |
346 | perror("grantpt"); |
347 | exit(1); |
348 | } |
349 | |
d6fa1947 |
350 | if (unlockpt(pty->master_fd) < 0) { |
054d8535 |
351 | perror("unlockpt"); |
352 | exit(1); |
353 | } |
354 | |
db9b7dce |
355 | cloexec(pty->master_fd); |
89e97516 |
356 | |
d6fa1947 |
357 | pty->name[FILENAME_MAX-1] = '\0'; |
358 | strncpy(pty->name, ptsname(pty->master_fd), FILENAME_MAX-1); |
be4f86de |
359 | #endif |
d6fa1947 |
360 | |
2916fa14 |
361 | { |
362 | /* |
363 | * Set the pty master into non-blocking mode. |
364 | */ |
f98b8260 |
365 | int fl; |
366 | fl = fcntl(pty->master_fd, F_GETFL); |
367 | if (fl != -1 && !(fl & O_NONBLOCK)) |
368 | fcntl(pty->master_fd, F_SETFL, fl | O_NONBLOCK); |
2916fa14 |
369 | } |
370 | |
d6fa1947 |
371 | if (!ptys_by_fd) |
372 | ptys_by_fd = newtree234(pty_compare_by_fd); |
373 | add234(ptys_by_fd, pty); |
95c47834 |
374 | } |
054d8535 |
375 | |
95c47834 |
376 | /* |
377 | * Pre-initialisation. This is here to get around the fact that GTK |
378 | * doesn't like being run in setuid/setgid programs (probably |
379 | * sensibly). So before we initialise GTK - and therefore before we |
380 | * even process the command line - we check to see if we're running |
381 | * set[ug]id. If so, we open our pty master _now_, chown it as |
382 | * necessary, and drop privileges. We can always close it again |
383 | * later. If we're potentially going to be doing utmp as well, we |
384 | * also fork off a utmp helper process and communicate with it by |
385 | * means of a pipe; the utmp helper will keep privileges in order |
386 | * to clean up utmp when we exit (i.e. when its end of our pipe |
387 | * closes). |
388 | */ |
389 | void pty_pre_init(void) |
390 | { |
d6fa1947 |
391 | Pty pty; |
392 | |
d4e1d591 |
393 | #ifndef OMIT_UTMP |
95c47834 |
394 | pid_t pid; |
395 | int pipefd[2]; |
d4e1d591 |
396 | #endif |
95c47834 |
397 | |
d6fa1947 |
398 | pty = single_pty = snew(struct pty_tag); |
2916fa14 |
399 | bufchain_init(&pty->output_data); |
d6fa1947 |
400 | |
0f33f9d1 |
401 | /* set the child signal handler straight away; it needs to be set |
402 | * before we ever fork. */ |
403 | putty_signal(SIGCHLD, sigchld_handler); |
d6fa1947 |
404 | pty->master_fd = pty->slave_fd = -1; |
405 | #ifndef OMIT_UTMP |
406 | pty_stamped_utmp = FALSE; |
407 | #endif |
95c47834 |
408 | |
409 | if (geteuid() != getuid() || getegid() != getgid()) { |
d6fa1947 |
410 | pty_open_master(pty); |
39baeaa4 |
411 | |
95c47834 |
412 | #ifndef OMIT_UTMP |
dd5517cb |
413 | /* |
414 | * Fork off the utmp helper. |
415 | */ |
416 | if (pipe(pipefd) < 0) { |
417 | perror("pterm: pipe"); |
418 | exit(1); |
419 | } |
420 | cloexec(pipefd[0]); |
421 | cloexec(pipefd[1]); |
422 | pid = fork(); |
423 | if (pid < 0) { |
424 | perror("pterm: fork"); |
425 | exit(1); |
426 | } else if (pid == 0) { |
427 | char display[128], buffer[128]; |
428 | int dlen, ret; |
429 | |
430 | close(pipefd[1]); |
431 | /* |
432 | * Now sit here until we receive a display name from the |
433 | * other end of the pipe, and then stamp utmp. Unstamp utmp |
434 | * again, and exit, when the pipe closes. |
435 | */ |
95c47834 |
436 | |
dd5517cb |
437 | dlen = 0; |
438 | while (1) { |
95c47834 |
439 | |
dd5517cb |
440 | ret = read(pipefd[0], buffer, lenof(buffer)); |
441 | if (ret <= 0) { |
442 | cleanup_utmp(); |
443 | _exit(0); |
444 | } else if (!pty_stamped_utmp) { |
445 | if (dlen < lenof(display)) |
446 | memcpy(display+dlen, buffer, |
447 | min(ret, lenof(display)-dlen)); |
448 | if (buffer[ret-1] == '\0') { |
449 | /* |
450 | * Now we have a display name. NUL-terminate |
451 | * it, and stamp utmp. |
452 | */ |
453 | display[lenof(display)-1] = '\0'; |
454 | /* |
455 | * Trap as many fatal signals as we can in the |
456 | * hope of having the best possible chance to |
457 | * clean up utmp before termination. We are |
458 | * unfortunately unprotected against SIGKILL, |
459 | * but that's life. |
460 | */ |
461 | putty_signal(SIGHUP, fatal_sig_handler); |
462 | putty_signal(SIGINT, fatal_sig_handler); |
463 | putty_signal(SIGQUIT, fatal_sig_handler); |
464 | putty_signal(SIGILL, fatal_sig_handler); |
465 | putty_signal(SIGABRT, fatal_sig_handler); |
466 | putty_signal(SIGFPE, fatal_sig_handler); |
467 | putty_signal(SIGPIPE, fatal_sig_handler); |
468 | putty_signal(SIGALRM, fatal_sig_handler); |
469 | putty_signal(SIGTERM, fatal_sig_handler); |
470 | putty_signal(SIGSEGV, fatal_sig_handler); |
471 | putty_signal(SIGUSR1, fatal_sig_handler); |
472 | putty_signal(SIGUSR2, fatal_sig_handler); |
755a6d84 |
473 | #ifdef SIGBUS |
dd5517cb |
474 | putty_signal(SIGBUS, fatal_sig_handler); |
755a6d84 |
475 | #endif |
476 | #ifdef SIGPOLL |
dd5517cb |
477 | putty_signal(SIGPOLL, fatal_sig_handler); |
755a6d84 |
478 | #endif |
479 | #ifdef SIGPROF |
dd5517cb |
480 | putty_signal(SIGPROF, fatal_sig_handler); |
755a6d84 |
481 | #endif |
482 | #ifdef SIGSYS |
dd5517cb |
483 | putty_signal(SIGSYS, fatal_sig_handler); |
755a6d84 |
484 | #endif |
485 | #ifdef SIGTRAP |
dd5517cb |
486 | putty_signal(SIGTRAP, fatal_sig_handler); |
755a6d84 |
487 | #endif |
488 | #ifdef SIGVTALRM |
dd5517cb |
489 | putty_signal(SIGVTALRM, fatal_sig_handler); |
755a6d84 |
490 | #endif |
491 | #ifdef SIGXCPU |
dd5517cb |
492 | putty_signal(SIGXCPU, fatal_sig_handler); |
755a6d84 |
493 | #endif |
494 | #ifdef SIGXFSZ |
dd5517cb |
495 | putty_signal(SIGXFSZ, fatal_sig_handler); |
755a6d84 |
496 | #endif |
497 | #ifdef SIGIO |
dd5517cb |
498 | putty_signal(SIGIO, fatal_sig_handler); |
499 | #endif |
500 | setup_utmp(pty->name, display); |
501 | } |
502 | } |
503 | } |
504 | } else { |
505 | close(pipefd[0]); |
506 | pty_utmp_helper_pid = pid; |
507 | pty_utmp_helper_pipe = pipefd[1]; |
508 | } |
95c47834 |
509 | #endif |
95c47834 |
510 | } |
95c47834 |
511 | |
512 | /* Drop privs. */ |
513 | { |
95c47834 |
514 | #ifndef HAVE_NO_SETRESUID |
d4e1d591 |
515 | int gid = getgid(), uid = getuid(); |
95c47834 |
516 | int setresgid(gid_t, gid_t, gid_t); |
517 | int setresuid(uid_t, uid_t, uid_t); |
518 | setresgid(gid, gid, gid); |
519 | setresuid(uid, uid, uid); |
520 | #else |
521 | setgid(getgid()); |
522 | setuid(getuid()); |
523 | #endif |
524 | } |
525 | } |
526 | |
d6fa1947 |
527 | int pty_real_select_result(Pty pty, int event, int status) |
74aca06d |
528 | { |
529 | char buf[4096]; |
530 | int ret; |
531 | int finished = FALSE; |
532 | |
d6fa1947 |
533 | if (event < 0) { |
74aca06d |
534 | /* |
d6fa1947 |
535 | * We've been called because our child process did |
536 | * something. `status' tells us what. |
74aca06d |
537 | */ |
d6fa1947 |
538 | if ((WIFEXITED(status) || WIFSIGNALED(status))) { |
74aca06d |
539 | /* |
d6fa1947 |
540 | * The primary child process died. We could keep |
541 | * the terminal open for remaining subprocesses to |
542 | * output to, but conventional wisdom seems to feel |
543 | * that that's the Wrong Thing for an xterm-alike, |
544 | * so we bail out now (though we don't necessarily |
545 | * _close_ the window, depending on the state of |
546 | * Close On Exit). This would be easy enough to |
547 | * change or make configurable if necessary. |
74aca06d |
548 | */ |
d6fa1947 |
549 | pty->exit_code = status; |
550 | pty->child_dead = TRUE; |
551 | del234(ptys_by_pid, pty); |
74aca06d |
552 | finished = TRUE; |
74aca06d |
553 | } |
d6fa1947 |
554 | } else { |
555 | if (event == 1) { |
74aca06d |
556 | |
d6fa1947 |
557 | ret = read(pty->master_fd, buf, sizeof(buf)); |
74aca06d |
558 | |
d6fa1947 |
559 | /* |
560 | * Clean termination condition is that either ret == 0, or ret |
561 | * < 0 and errno == EIO. Not sure why the latter, but it seems |
562 | * to happen. Boo. |
563 | */ |
564 | if (ret == 0 || (ret < 0 && errno == EIO)) { |
74aca06d |
565 | /* |
d6fa1947 |
566 | * We assume a clean exit if the pty has closed but the |
567 | * actual child process hasn't. The only way I can |
568 | * imagine this happening is if it detaches itself from |
569 | * the pty and goes daemonic - in which case the |
570 | * expected usage model would precisely _not_ be for |
571 | * the pterm window to hang around! |
74aca06d |
572 | */ |
74aca06d |
573 | finished = TRUE; |
d6fa1947 |
574 | if (!pty->child_dead) |
575 | pty->exit_code = 0; |
576 | } else if (ret < 0) { |
577 | perror("read pty master"); |
578 | exit(1); |
579 | } else if (ret > 0) { |
580 | from_backend(pty->frontend, 0, buf, ret); |
74aca06d |
581 | } |
2916fa14 |
582 | } else if (event == 2) { |
583 | /* |
584 | * Attempt to send data down the pty. |
585 | */ |
586 | pty_try_write(pty); |
587 | } |
74aca06d |
588 | } |
589 | |
d6fa1947 |
590 | if (finished && !pty->finished) { |
4a693cfc |
591 | int close_on_exit; |
592 | |
d6fa1947 |
593 | uxsel_del(pty->master_fd); |
594 | pty_close(pty); |
595 | pty->master_fd = -1; |
74aca06d |
596 | |
d6fa1947 |
597 | pty->finished = TRUE; |
74aca06d |
598 | |
599 | /* |
600 | * This is a slight layering-violation sort of hack: only |
601 | * if we're not closing on exit (COE is set to Never, or to |
602 | * Only On Clean and it wasn't a clean exit) do we output a |
603 | * `terminated' message. |
604 | */ |
4a693cfc |
605 | close_on_exit = conf_get_int(pty->conf, CONF_close_on_exit); |
606 | if (close_on_exit == FORCE_OFF || |
607 | (close_on_exit == AUTO && pty->exit_code != 0)) { |
74aca06d |
608 | char message[512]; |
d6fa1947 |
609 | if (WIFEXITED(pty->exit_code)) |
74aca06d |
610 | sprintf(message, "\r\n[pterm: process terminated with exit" |
d6fa1947 |
611 | " code %d]\r\n", WEXITSTATUS(pty->exit_code)); |
612 | else if (WIFSIGNALED(pty->exit_code)) |
74aca06d |
613 | #ifdef HAVE_NO_STRSIGNAL |
614 | sprintf(message, "\r\n[pterm: process terminated on signal" |
d6fa1947 |
615 | " %d]\r\n", WTERMSIG(pty->exit_code)); |
74aca06d |
616 | #else |
617 | sprintf(message, "\r\n[pterm: process terminated on signal" |
d6fa1947 |
618 | " %d (%.400s)]\r\n", WTERMSIG(pty->exit_code), |
619 | strsignal(WTERMSIG(pty->exit_code))); |
74aca06d |
620 | #endif |
d6fa1947 |
621 | from_backend(pty->frontend, 0, message, strlen(message)); |
74aca06d |
622 | } |
39934deb |
623 | |
d6fa1947 |
624 | notify_remote_exit(pty->frontend); |
74aca06d |
625 | } |
d6fa1947 |
626 | |
74aca06d |
627 | return !finished; |
628 | } |
629 | |
d6fa1947 |
630 | int pty_select_result(int fd, int event) |
74aca06d |
631 | { |
d6fa1947 |
632 | int ret = TRUE; |
633 | Pty pty; |
634 | |
635 | if (fd == pty_signal_pipe[0]) { |
636 | pid_t pid; |
d6fa1947 |
637 | int status; |
638 | char c[1]; |
639 | |
ecb25722 |
640 | if (read(pty_signal_pipe[0], c, 1) <= 0) |
641 | /* ignore error */; |
642 | /* ignore its value; it'll be `x' */ |
d6fa1947 |
643 | |
644 | do { |
645 | pid = waitpid(-1, &status, WNOHANG); |
646 | |
d6fa1947 |
647 | pty = find234(ptys_by_pid, &pid, pty_find_by_pid); |
648 | |
649 | if (pty) |
650 | ret = ret && pty_real_select_result(pty, -1, status); |
651 | } while (pid > 0); |
652 | } else { |
653 | pty = find234(ptys_by_fd, &fd, pty_find_by_fd); |
654 | |
655 | if (pty) |
656 | ret = ret && pty_real_select_result(pty, event, 0); |
657 | } |
658 | |
659 | return ret; |
660 | } |
661 | |
662 | static void pty_uxsel_setup(Pty pty) |
663 | { |
2916fa14 |
664 | int rwx; |
665 | |
666 | rwx = 1; /* always want to read from pty */ |
667 | if (bufchain_size(&pty->output_data)) |
668 | rwx |= 2; /* might also want to write to it */ |
669 | uxsel_set(pty->master_fd, rwx, pty_select_result); |
d6fa1947 |
670 | |
671 | /* |
672 | * In principle this only needs calling once for all pty |
673 | * backend instances, but it's simplest just to call it every |
674 | * time; uxsel won't mind. |
675 | */ |
74aca06d |
676 | uxsel_set(pty_signal_pipe[0], 1, pty_select_result); |
677 | } |
678 | |
95c47834 |
679 | /* |
680 | * Called to set up the pty. |
681 | * |
682 | * Returns an error message, or NULL on success. |
683 | * |
684 | * Also places the canonical host name into `realhost'. It must be |
685 | * freed by the caller. |
686 | */ |
4a693cfc |
687 | static const char *pty_init(void *frontend, void **backend_handle, Conf *conf, |
79bf227b |
688 | char *host, int port, char **realhost, int nodelay, |
689 | int keepalive) |
95c47834 |
690 | { |
691 | int slavefd; |
692 | pid_t pid, pgrp; |
c13772b1 |
693 | #ifndef NOT_X_WINDOWS /* for Mac OS X native compilation */ |
7af753e6 |
694 | long windowid; |
c13772b1 |
695 | #endif |
d6fa1947 |
696 | Pty pty; |
95c47834 |
697 | |
d6fa1947 |
698 | if (single_pty) { |
699 | pty = single_pty; |
700 | } else { |
701 | pty = snew(struct pty_tag); |
702 | pty->master_fd = pty->slave_fd = -1; |
703 | #ifndef OMIT_UTMP |
704 | pty_stamped_utmp = FALSE; |
705 | #endif |
706 | } |
707 | |
708 | pty->frontend = frontend; |
28d00fe4 |
709 | *backend_handle = NULL; /* we can't sensibly use this, sadly */ |
710 | |
4a693cfc |
711 | pty->conf = conf_copy(conf); |
712 | pty->term_width = conf_get_int(conf, CONF_width); |
713 | pty->term_height = conf_get_int(conf, CONF_height); |
f278d6f8 |
714 | |
d6fa1947 |
715 | if (pty->master_fd < 0) |
716 | pty_open_master(pty); |
95c47834 |
717 | |
718 | /* |
719 | * Set the backspace character to be whichever of ^H and ^? is |
720 | * specified by bksp_is_delete. |
721 | */ |
722 | { |
723 | struct termios attrs; |
d6fa1947 |
724 | tcgetattr(pty->master_fd, &attrs); |
4a693cfc |
725 | attrs.c_cc[VERASE] = conf_get_int(conf, CONF_bksp_is_delete) |
726 | ? '\177' : '\010'; |
d6fa1947 |
727 | tcsetattr(pty->master_fd, TCSANOW, &attrs); |
95c47834 |
728 | } |
729 | |
d4e1d591 |
730 | #ifndef OMIT_UTMP |
95c47834 |
731 | /* |
732 | * Stamp utmp (that is, tell the utmp helper process to do so), |
733 | * or not. |
734 | */ |
4a693cfc |
735 | if (!conf_get_int(conf, CONF_stamp_utmp)) { |
95c47834 |
736 | close(pty_utmp_helper_pipe); /* just let the child process die */ |
58dcb876 |
737 | pty_utmp_helper_pipe = -1; |
dd5517cb |
738 | } else if (pty_utmp_helper_pipe >= 0) { |
d6fa1947 |
739 | char *location = get_x_display(pty->frontend); |
95c47834 |
740 | int len = strlen(location)+1, pos = 0; /* +1 to include NUL */ |
741 | while (pos < len) { |
742 | int ret = write(pty_utmp_helper_pipe, location+pos, len - pos); |
743 | if (ret < 0) { |
744 | perror("pterm: writing to utmp helper process"); |
745 | close(pty_utmp_helper_pipe); /* arrgh, just give up */ |
58dcb876 |
746 | pty_utmp_helper_pipe = -1; |
95c47834 |
747 | break; |
748 | } |
749 | pos += ret; |
750 | } |
751 | } |
d4e1d591 |
752 | #endif |
755a6d84 |
753 | |
c13772b1 |
754 | #ifndef NOT_X_WINDOWS /* for Mac OS X native compilation */ |
d6fa1947 |
755 | windowid = get_windowid(pty->frontend); |
c13772b1 |
756 | #endif |
7af753e6 |
757 | |
755a6d84 |
758 | /* |
054d8535 |
759 | * Fork and execute the command. |
760 | */ |
761 | pid = fork(); |
762 | if (pid < 0) { |
763 | perror("fork"); |
88e6b9ca |
764 | exit(1); |
054d8535 |
765 | } |
766 | |
767 | if (pid == 0) { |
054d8535 |
768 | /* |
769 | * We are the child. |
770 | */ |
d37c2d81 |
771 | |
d6fa1947 |
772 | slavefd = pty_open_slave(pty); |
d37c2d81 |
773 | if (slavefd < 0) { |
774 | perror("slave pty: open"); |
0f33f9d1 |
775 | _exit(1); |
d37c2d81 |
776 | } |
777 | |
d6fa1947 |
778 | close(pty->master_fd); |
054d8535 |
779 | fcntl(slavefd, F_SETFD, 0); /* don't close on exec */ |
780 | dup2(slavefd, 0); |
781 | dup2(slavefd, 1); |
782 | dup2(slavefd, 2); |
90f2ed42 |
783 | close(slavefd); |
054d8535 |
784 | setsid(); |
bbaa7993 |
785 | #ifdef TIOCSCTTY |
211b4228 |
786 | ioctl(0, TIOCSCTTY, 1); |
bbaa7993 |
787 | #endif |
d37c2d81 |
788 | pgrp = getpid(); |
3a7c6b9e |
789 | tcsetpgrp(0, pgrp); |
ea0716c6 |
790 | setpgid(pgrp, pgrp); |
d6fa1947 |
791 | close(open(pty->name, O_WRONLY, 0)); |
ea0716c6 |
792 | setpgid(pgrp, pgrp); |
fe9548aa |
793 | { |
4a693cfc |
794 | char *term_env_var = dupprintf("TERM=%s", |
795 | conf_get_str(conf, CONF_termtype)); |
fe9548aa |
796 | putenv(term_env_var); |
30d1257c |
797 | /* We mustn't free term_env_var, as putenv links it into the |
798 | * environment in place. |
799 | */ |
fe9548aa |
800 | } |
c13772b1 |
801 | #ifndef NOT_X_WINDOWS /* for Mac OS X native compilation */ |
7af753e6 |
802 | { |
30d1257c |
803 | char *windowid_env_var = dupprintf("WINDOWID=%ld", windowid); |
7af753e6 |
804 | putenv(windowid_env_var); |
30d1257c |
805 | /* We mustn't free windowid_env_var, as putenv links it into the |
806 | * environment in place. |
807 | */ |
7af753e6 |
808 | } |
c13772b1 |
809 | #endif |
73feed4f |
810 | { |
4a693cfc |
811 | char *key, *val; |
812 | |
813 | for (val = conf_get_str_strs(conf, CONF_environmt, NULL, &key); |
814 | val != NULL; |
815 | val = conf_get_str_strs(conf, CONF_environmt, key, &key)) { |
816 | char *varval = dupcat(key, "=", val, NULL); |
73feed4f |
817 | putenv(varval); |
818 | /* |
819 | * We must not free varval, since putenv links it |
820 | * into the environment _in place_. Weird, but |
821 | * there we go. Memory usage will be rationalised |
822 | * as soon as we exec anyway. |
823 | */ |
824 | } |
825 | } |
826 | |
8bf5c419 |
827 | /* |
203abf9e |
828 | * SIGINT, SIGQUIT and SIGPIPE may have been set to ignored by |
829 | * our parent, particularly by things like sh -c 'pterm &' and |
830 | * some window or session managers. SIGCHLD, meanwhile, was |
831 | * blocked during pt_main() startup. Reverse all this for our |
832 | * child process. |
8bf5c419 |
833 | */ |
0f33f9d1 |
834 | putty_signal(SIGINT, SIG_DFL); |
835 | putty_signal(SIGQUIT, SIG_DFL); |
203abf9e |
836 | putty_signal(SIGPIPE, SIG_DFL); |
15b5d988 |
837 | block_signal(SIGCHLD, 0); |
34826e4a |
838 | if (pty_argv) { |
839 | /* |
840 | * Exec the exact argument list we were given. |
841 | */ |
6169c758 |
842 | execvp(pty_argv[0], pty_argv); |
34826e4a |
843 | /* |
844 | * If that fails, and if we had exactly one argument, pass |
845 | * that argument to $SHELL -c. |
846 | * |
847 | * This arranges that we can _either_ follow 'pterm -e' |
848 | * with a list of argv elements to be fed directly to |
849 | * exec, _or_ with a single argument containing a command |
850 | * to be parsed by a shell (but, in cases of doubt, the |
851 | * former is more reliable). |
852 | * |
853 | * A quick survey of other terminal emulators' -e options |
854 | * (as of Debian squeeze) suggests that: |
855 | * |
856 | * - xterm supports both modes, more or less like this |
857 | * - gnome-terminal will only accept a one-string shell command |
858 | * - Eterm, kterm and rxvt will only accept a list of |
859 | * argv elements (as did older versions of pterm). |
860 | * |
861 | * It therefore seems important to support both usage |
862 | * modes in order to be a drop-in replacement for either |
863 | * xterm or gnome-terminal, and hence for anyone's |
864 | * plausible uses of the Debian-style alias |
865 | * 'x-terminal-emulator'... |
866 | */ |
867 | if (pty_argv[1] == NULL) { |
868 | char *shell = getenv("SHELL"); |
869 | if (shell) |
870 | execl(shell, shell, "-c", pty_argv[0], (void *)NULL); |
871 | } |
872 | } else { |
c8ee61b9 |
873 | char *shell = getenv("SHELL"); |
874 | char *shellname; |
4a693cfc |
875 | if (conf_get_int(conf, CONF_login_shell)) { |
c8ee61b9 |
876 | char *p = strrchr(shell, '/'); |
3d88e64d |
877 | shellname = snewn(2+strlen(shell), char); |
c8ee61b9 |
878 | p = p ? p+1 : shell; |
879 | sprintf(shellname, "-%s", p); |
880 | } else |
881 | shellname = shell; |
30264db9 |
882 | execl(getenv("SHELL"), shellname, (void *)NULL); |
c8ee61b9 |
883 | } |
884 | |
054d8535 |
885 | /* |
886 | * If we're here, exec has gone badly foom. |
887 | */ |
888 | perror("exec"); |
0f33f9d1 |
889 | _exit(127); |
054d8535 |
890 | } else { |
d6fa1947 |
891 | pty->child_pid = pid; |
892 | pty->child_dead = FALSE; |
893 | pty->finished = FALSE; |
894 | if (pty->slave_fd > 0) |
895 | close(pty->slave_fd); |
896 | if (!ptys_by_pid) |
897 | ptys_by_pid = newtree234(pty_compare_by_pid); |
898 | add234(ptys_by_pid, pty); |
270d2e8d |
899 | } |
054d8535 |
900 | |
90f2ed42 |
901 | if (pty_signal_pipe[0] < 0) { |
902 | if (pipe(pty_signal_pipe) < 0) { |
903 | perror("pipe"); |
904 | exit(1); |
905 | } |
906 | cloexec(pty_signal_pipe[0]); |
907 | cloexec(pty_signal_pipe[1]); |
74aca06d |
908 | } |
d6fa1947 |
909 | pty_uxsel_setup(pty); |
910 | |
911 | *backend_handle = pty; |
74aca06d |
912 | |
5617c1e6 |
913 | *realhost = dupprintf("\0"); |
914 | |
1709795f |
915 | return NULL; |
916 | } |
917 | |
4a693cfc |
918 | static void pty_reconfig(void *handle, Conf *conf) |
86916870 |
919 | { |
d6fa1947 |
920 | Pty pty = (Pty)handle; |
6b0eeb4e |
921 | /* |
922 | * We don't have much need to reconfigure this backend, but |
923 | * unfortunately we do need to pick up the setting of Close On |
924 | * Exit so we know whether to give a `terminated' message. |
925 | */ |
4a693cfc |
926 | conf_copy_into(pty->conf, conf); |
86916870 |
927 | } |
928 | |
929 | /* |
6b0eeb4e |
930 | * Stub routine (never called in pterm). |
cb60dcb3 |
931 | */ |
932 | static void pty_free(void *handle) |
933 | { |
d6fa1947 |
934 | Pty pty = (Pty)handle; |
935 | |
936 | /* Either of these may fail `not found'. That's fine with us. */ |
937 | del234(ptys_by_pid, pty); |
938 | del234(ptys_by_fd, pty); |
939 | |
940 | sfree(pty); |
cb60dcb3 |
941 | } |
942 | |
2916fa14 |
943 | static void pty_try_write(Pty pty) |
944 | { |
945 | void *data; |
946 | int len, ret; |
947 | |
948 | assert(pty->master_fd >= 0); |
949 | |
950 | while (bufchain_size(&pty->output_data) > 0) { |
951 | bufchain_prefix(&pty->output_data, &data, &len); |
952 | ret = write(pty->master_fd, data, len); |
953 | |
954 | if (ret < 0 && (errno == EWOULDBLOCK)) { |
955 | /* |
956 | * We've sent all we can for the moment. |
957 | */ |
958 | break; |
959 | } |
960 | if (ret < 0) { |
961 | perror("write pty master"); |
962 | exit(1); |
963 | } |
964 | bufchain_consume(&pty->output_data, ret); |
965 | } |
966 | |
967 | pty_uxsel_setup(pty); |
968 | } |
969 | |
cb60dcb3 |
970 | /* |
1709795f |
971 | * Called to send data down the pty. |
972 | */ |
28d00fe4 |
973 | static int pty_send(void *handle, char *buf, int len) |
1709795f |
974 | { |
d6fa1947 |
975 | Pty pty = (Pty)handle; |
976 | |
977 | if (pty->master_fd < 0) |
2916fa14 |
978 | return 0; /* ignore all writes if fd closed */ |
90cfd8f4 |
979 | |
2916fa14 |
980 | bufchain_add(&pty->output_data, buf, len); |
981 | pty_try_write(pty); |
982 | |
983 | return bufchain_size(&pty->output_data); |
1709795f |
984 | } |
985 | |
d6fa1947 |
986 | static void pty_close(Pty pty) |
90cfd8f4 |
987 | { |
d6fa1947 |
988 | if (pty->master_fd >= 0) { |
989 | close(pty->master_fd); |
990 | pty->master_fd = -1; |
90cfd8f4 |
991 | } |
d4e1d591 |
992 | #ifndef OMIT_UTMP |
58dcb876 |
993 | if (pty_utmp_helper_pipe >= 0) { |
994 | close(pty_utmp_helper_pipe); /* this causes utmp to be cleaned up */ |
995 | pty_utmp_helper_pipe = -1; |
996 | } |
d4e1d591 |
997 | #endif |
90cfd8f4 |
998 | } |
999 | |
1709795f |
1000 | /* |
1001 | * Called to query the current socket sendability status. |
1002 | */ |
28d00fe4 |
1003 | static int pty_sendbuffer(void *handle) |
1709795f |
1004 | { |
d6fa1947 |
1005 | /* Pty pty = (Pty)handle; */ |
1709795f |
1006 | return 0; |
1007 | } |
1008 | |
1009 | /* |
1010 | * Called to set the size of the window |
1011 | */ |
28d00fe4 |
1012 | static void pty_size(void *handle, int width, int height) |
1709795f |
1013 | { |
d6fa1947 |
1014 | Pty pty = (Pty)handle; |
88e6b9ca |
1015 | struct winsize size; |
1016 | |
d6fa1947 |
1017 | pty->term_width = width; |
1018 | pty->term_height = height; |
f278d6f8 |
1019 | |
d6fa1947 |
1020 | size.ws_row = (unsigned short)pty->term_height; |
1021 | size.ws_col = (unsigned short)pty->term_width; |
1022 | size.ws_xpixel = (unsigned short) pty->term_width * |
1023 | font_dimension(pty->frontend, 0); |
1024 | size.ws_ypixel = (unsigned short) pty->term_height * |
1025 | font_dimension(pty->frontend, 1); |
1026 | ioctl(pty->master_fd, TIOCSWINSZ, (void *)&size); |
1709795f |
1027 | return; |
1028 | } |
1029 | |
1030 | /* |
1031 | * Send special codes. |
1032 | */ |
28d00fe4 |
1033 | static void pty_special(void *handle, Telnet_Special code) |
1709795f |
1034 | { |
d6fa1947 |
1035 | /* Pty pty = (Pty)handle; */ |
1709795f |
1036 | /* Do nothing! */ |
1037 | return; |
1038 | } |
1039 | |
125105d1 |
1040 | /* |
1041 | * Return a list of the special codes that make sense in this |
1042 | * protocol. |
1043 | */ |
1044 | static const struct telnet_special *pty_get_specials(void *handle) |
1045 | { |
d6fa1947 |
1046 | /* Pty pty = (Pty)handle; */ |
125105d1 |
1047 | /* |
1048 | * Hmm. When I get round to having this actually usable, it |
1049 | * might be quite nice to have the ability to deliver a few |
1050 | * well chosen signals to the child process - SIGINT, SIGTERM, |
1051 | * SIGKILL at least. |
1052 | */ |
1053 | return NULL; |
1054 | } |
1055 | |
6226c939 |
1056 | static int pty_connected(void *handle) |
1709795f |
1057 | { |
d6fa1947 |
1058 | /* Pty pty = (Pty)handle; */ |
6226c939 |
1059 | return TRUE; |
1709795f |
1060 | } |
1061 | |
28d00fe4 |
1062 | static int pty_sendok(void *handle) |
1709795f |
1063 | { |
d6fa1947 |
1064 | /* Pty pty = (Pty)handle; */ |
1709795f |
1065 | return 1; |
1066 | } |
1067 | |
28d00fe4 |
1068 | static void pty_unthrottle(void *handle, int backlog) |
1709795f |
1069 | { |
d6fa1947 |
1070 | /* Pty pty = (Pty)handle; */ |
1709795f |
1071 | /* do nothing */ |
1072 | } |
1073 | |
28d00fe4 |
1074 | static int pty_ldisc(void *handle, int option) |
1709795f |
1075 | { |
d6fa1947 |
1076 | /* Pty pty = (Pty)handle; */ |
1709795f |
1077 | return 0; /* neither editing nor echoing */ |
1078 | } |
1079 | |
b9d7bcad |
1080 | static void pty_provide_ldisc(void *handle, void *ldisc) |
1081 | { |
d6fa1947 |
1082 | /* Pty pty = (Pty)handle; */ |
b9d7bcad |
1083 | /* This is a stub. */ |
1084 | } |
1085 | |
a8327734 |
1086 | static void pty_provide_logctx(void *handle, void *logctx) |
1087 | { |
d6fa1947 |
1088 | /* Pty pty = (Pty)handle; */ |
a8327734 |
1089 | /* This is a stub. */ |
1090 | } |
1091 | |
28d00fe4 |
1092 | static int pty_exitcode(void *handle) |
1709795f |
1093 | { |
d6fa1947 |
1094 | Pty pty = (Pty)handle; |
1095 | if (!pty->finished) |
90cfd8f4 |
1096 | return -1; /* not dead yet */ |
1097 | else |
d6fa1947 |
1098 | return pty->exit_code; |
1709795f |
1099 | } |
1100 | |
f89c3294 |
1101 | static int pty_cfg_info(void *handle) |
1102 | { |
d6fa1947 |
1103 | /* Pty pty = (Pty)handle; */ |
f89c3294 |
1104 | return 0; |
1105 | } |
1106 | |
1709795f |
1107 | Backend pty_backend = { |
1108 | pty_init, |
cb60dcb3 |
1109 | pty_free, |
86916870 |
1110 | pty_reconfig, |
1709795f |
1111 | pty_send, |
1112 | pty_sendbuffer, |
1113 | pty_size, |
1114 | pty_special, |
125105d1 |
1115 | pty_get_specials, |
6226c939 |
1116 | pty_connected, |
1709795f |
1117 | pty_exitcode, |
1118 | pty_sendok, |
1119 | pty_ldisc, |
b9d7bcad |
1120 | pty_provide_ldisc, |
a8327734 |
1121 | pty_provide_logctx, |
1709795f |
1122 | pty_unthrottle, |
f89c3294 |
1123 | pty_cfg_info, |
9e164d82 |
1124 | "pty", |
1125 | -1, |
a4451dd1 |
1126 | 0 |
1709795f |
1127 | }; |