c5e438ec |
1 | /* |
2 | * PLink - a command-line (stdin/stdout) variant of PuTTY. |
3 | */ |
4 | |
5 | #include <stdio.h> |
6 | #include <stdlib.h> |
5673d44e |
7 | #include <errno.h> |
c5e438ec |
8 | #include <assert.h> |
9 | #include <stdarg.h> |
5673d44e |
10 | #include <signal.h> |
c5e438ec |
11 | #include <unistd.h> |
12 | #include <fcntl.h> |
13 | #include <termios.h> |
5a9eb105 |
14 | #include <pwd.h> |
15 | #include <sys/ioctl.h> |
c5e438ec |
16 | |
17 | /* More helpful version of the FD_SET macro, to also handle maxfd. */ |
18 | #define FD_SET_MAX(fd, max, set) do { \ |
19 | FD_SET(fd, &set); \ |
20 | if (max < fd + 1) max = fd + 1; \ |
21 | } while (0) |
22 | |
23 | #define PUTTY_DO_GLOBALS /* actually _define_ globals */ |
24 | #include "putty.h" |
25 | #include "storage.h" |
26 | #include "tree234.h" |
27 | |
28 | #define MAX_STDIN_BACKLOG 4096 |
29 | |
30 | void fatalbox(char *p, ...) |
31 | { |
32 | va_list ap; |
33 | fprintf(stderr, "FATAL ERROR: "); |
34 | va_start(ap, p); |
35 | vfprintf(stderr, p, ap); |
36 | va_end(ap); |
37 | fputc('\n', stderr); |
38 | cleanup_exit(1); |
39 | } |
40 | void modalfatalbox(char *p, ...) |
41 | { |
42 | va_list ap; |
43 | fprintf(stderr, "FATAL ERROR: "); |
44 | va_start(ap, p); |
45 | vfprintf(stderr, p, ap); |
46 | va_end(ap); |
47 | fputc('\n', stderr); |
48 | cleanup_exit(1); |
49 | } |
50 | void connection_fatal(void *frontend, char *p, ...) |
51 | { |
52 | va_list ap; |
53 | fprintf(stderr, "FATAL ERROR: "); |
54 | va_start(ap, p); |
55 | vfprintf(stderr, p, ap); |
56 | va_end(ap); |
57 | fputc('\n', stderr); |
58 | cleanup_exit(1); |
59 | } |
60 | void cmdline_error(char *p, ...) |
61 | { |
62 | va_list ap; |
63 | fprintf(stderr, "plink: "); |
64 | va_start(ap, p); |
65 | vfprintf(stderr, p, ap); |
66 | va_end(ap); |
67 | fputc('\n', stderr); |
68 | exit(1); |
69 | } |
70 | |
71 | struct termios orig_termios; |
72 | |
73 | static Backend *back; |
74 | static void *backhandle; |
75 | |
5a9eb105 |
76 | /* |
77 | * Default settings that are specific to pterm. |
78 | */ |
79 | char *platform_default_s(char *name) |
80 | { |
81 | if (!strcmp(name, "X11Display")) |
82 | return getenv("DISPLAY"); |
83 | if (!strcmp(name, "TermType")) |
84 | return getenv("TERM"); |
85 | if (!strcmp(name, "UserName")) { |
86 | /* |
87 | * Remote login username will default to the local username. |
88 | */ |
89 | struct passwd *p; |
90 | uid_t uid = getuid(); |
91 | char *user, *ret = NULL; |
92 | |
93 | /* |
94 | * First, find who we think we are using getlogin. If this |
95 | * agrees with our uid, we'll go along with it. This should |
96 | * allow sharing of uids between several login names whilst |
97 | * coping correctly with people who have su'ed. |
98 | */ |
99 | user = getlogin(); |
100 | setpwent(); |
101 | if (user) |
102 | p = getpwnam(user); |
103 | else |
104 | p = NULL; |
105 | if (p && p->pw_uid == uid) { |
106 | /* |
107 | * The result of getlogin() really does correspond to |
108 | * our uid. Fine. |
109 | */ |
110 | ret = user; |
111 | } else { |
112 | /* |
113 | * If that didn't work, for whatever reason, we'll do |
114 | * the simpler version: look up our uid in the password |
115 | * file and map it straight to a name. |
116 | */ |
117 | p = getpwuid(uid); |
118 | ret = p->pw_name; |
119 | } |
120 | endpwent(); |
121 | |
122 | return ret; |
123 | } |
124 | return NULL; |
125 | } |
126 | |
127 | int platform_default_i(char *name, int def) |
128 | { |
129 | if (!strcmp(name, "TermWidth") || |
130 | !strcmp(name, "TermHeight")) { |
131 | struct winsize size; |
132 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
133 | return (!strcmp(name, "TermWidth") ? size.ws_col : size.ws_row); |
134 | } |
135 | return def; |
136 | } |
137 | |
c5e438ec |
138 | char *x_get_default(char *key) |
139 | { |
140 | return NULL; /* this is a stub */ |
141 | } |
142 | int term_ldisc(Terminal *term, int mode) |
143 | { |
144 | return FALSE; |
145 | } |
146 | void ldisc_update(void *frontend, int echo, int edit) |
147 | { |
148 | /* Update stdin read mode to reflect changes in line discipline. */ |
149 | struct termios mode; |
150 | |
151 | mode = orig_termios; |
152 | |
153 | if (echo) |
154 | mode.c_lflag |= ECHO; |
155 | else |
156 | mode.c_lflag &= ~ECHO; |
157 | |
158 | if (edit) |
159 | mode.c_lflag |= ISIG | ICANON; |
160 | else |
161 | mode.c_lflag &= ~(ISIG | ICANON); |
162 | |
163 | tcsetattr(0, TCSANOW, &mode); |
164 | } |
165 | |
166 | void cleanup_termios(void) |
167 | { |
168 | tcsetattr(0, TCSANOW, &orig_termios); |
169 | } |
170 | |
171 | bufchain stdout_data, stderr_data; |
172 | |
173 | void try_output(int is_stderr) |
174 | { |
175 | bufchain *chain = (is_stderr ? &stderr_data : &stdout_data); |
176 | int fd = (is_stderr ? 2 : 1); |
177 | void *senddata; |
178 | int sendlen, ret; |
179 | |
d69a46c0 |
180 | if (bufchain_size(chain) == 0) |
181 | return; |
182 | |
c5e438ec |
183 | bufchain_prefix(chain, &senddata, &sendlen); |
184 | ret = write(fd, senddata, sendlen); |
185 | if (ret > 0) |
186 | bufchain_consume(chain, ret); |
187 | else if (ret < 0) { |
188 | perror(is_stderr ? "stderr: write" : "stdout: write"); |
189 | exit(1); |
190 | } |
191 | } |
192 | |
193 | int from_backend(void *frontend_handle, int is_stderr, char *data, int len) |
194 | { |
195 | int osize, esize; |
196 | |
197 | assert(len > 0); |
198 | |
199 | if (is_stderr) { |
200 | bufchain_add(&stderr_data, data, len); |
201 | try_output(1); |
202 | } else { |
203 | bufchain_add(&stdout_data, data, len); |
204 | try_output(0); |
205 | } |
206 | |
207 | osize = bufchain_size(&stdout_data); |
208 | esize = bufchain_size(&stderr_data); |
209 | |
210 | return osize + esize; |
211 | } |
212 | |
5673d44e |
213 | int signalpipe[2]; |
214 | |
215 | void sigwinch(int signum) |
216 | { |
217 | write(signalpipe[1], "x", 1); |
218 | } |
219 | |
c5e438ec |
220 | /* |
221 | * Short description of parameters. |
222 | */ |
223 | static void usage(void) |
224 | { |
225 | printf("PuTTY Link: command-line connection utility\n"); |
226 | printf("%s\n", ver); |
227 | printf("Usage: plink [options] [user@]host [command]\n"); |
228 | printf(" (\"host\" can also be a PuTTY saved session name)\n"); |
229 | printf("Options:\n"); |
230 | printf(" -v show verbose messages\n"); |
231 | printf(" -load sessname Load settings from saved session\n"); |
232 | printf(" -ssh -telnet -rlogin -raw\n"); |
233 | printf(" force use of a particular protocol (default SSH)\n"); |
234 | printf(" -P port connect to specified port\n"); |
235 | printf(" -l user connect with specified username\n"); |
236 | printf(" -m file read remote command(s) from file\n"); |
237 | printf(" -batch disable all interactive prompts\n"); |
238 | printf("The following options only apply to SSH connections:\n"); |
239 | printf(" -pw passw login with specified password\n"); |
240 | printf(" -L listen-port:host:port Forward local port to " |
241 | "remote address\n"); |
242 | printf(" -R listen-port:host:port Forward remote port to" |
243 | " local address\n"); |
244 | printf(" -X -x enable / disable X11 forwarding\n"); |
245 | printf(" -A -a enable / disable agent forwarding\n"); |
246 | printf(" -t -T enable / disable pty allocation\n"); |
247 | printf(" -1 -2 force use of particular protocol version\n"); |
248 | printf(" -C enable compression\n"); |
249 | printf(" -i key private key file for authentication\n"); |
250 | exit(1); |
251 | } |
252 | |
253 | int main(int argc, char **argv) |
254 | { |
255 | int sending; |
256 | int portnumber = -1; |
257 | int *sklist; |
258 | int socket; |
259 | int i, skcount, sksize, socketstate; |
260 | int connopen; |
261 | int exitcode; |
86256dc6 |
262 | int errors; |
c5e438ec |
263 | void *ldisc; |
264 | |
265 | ssh_get_line = console_get_line; |
266 | |
267 | sklist = NULL; |
268 | skcount = sksize = 0; |
269 | /* |
270 | * Initialise port and protocol to sensible defaults. (These |
271 | * will be overridden by more or less anything.) |
272 | */ |
273 | default_protocol = PROT_SSH; |
274 | default_port = 22; |
275 | |
276 | flags = FLAG_STDERR; |
277 | /* |
278 | * Process the command line. |
279 | */ |
280 | do_defaults(NULL, &cfg); |
281 | default_protocol = cfg.protocol; |
282 | default_port = cfg.port; |
86256dc6 |
283 | errors = 0; |
c5e438ec |
284 | { |
285 | /* |
286 | * Override the default protocol if PLINK_PROTOCOL is set. |
287 | */ |
288 | char *p = getenv("PLINK_PROTOCOL"); |
289 | int i; |
290 | if (p) { |
291 | for (i = 0; backends[i].backend != NULL; i++) { |
292 | if (!strcmp(backends[i].name, p)) { |
293 | default_protocol = cfg.protocol = backends[i].protocol; |
294 | default_port = cfg.port = |
295 | backends[i].backend->default_port; |
296 | break; |
297 | } |
298 | } |
299 | } |
300 | } |
301 | while (--argc) { |
302 | char *p = *++argv; |
303 | if (*p == '-') { |
304 | int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL), 1); |
305 | if (ret == -2) { |
306 | fprintf(stderr, |
307 | "plink: option \"%s\" requires an argument\n", p); |
86256dc6 |
308 | errors = 1; |
c5e438ec |
309 | } else if (ret == 2) { |
310 | --argc, ++argv; |
311 | } else if (ret == 1) { |
312 | continue; |
313 | } else if (!strcmp(p, "-batch")) { |
314 | console_batch_mode = 1; |
a0e5ed33 |
315 | } else if (!strcmp(p, "-o")) { |
86256dc6 |
316 | if (argc <= 1) { |
a0e5ed33 |
317 | fprintf(stderr, |
318 | "plink: option \"-o\" requires an argument\n"); |
86256dc6 |
319 | errors = 1; |
320 | } else { |
321 | --argc; |
322 | provide_xrm_string(*++argv); |
323 | } |
324 | } else { |
325 | fprintf(stderr, "plink: unknown option \"%s\"\n", p); |
326 | errors = 1; |
c5e438ec |
327 | } |
328 | } else if (*p) { |
329 | if (!*cfg.host) { |
330 | char *q = p; |
a0e5ed33 |
331 | |
332 | do_defaults(NULL, &cfg); |
333 | |
c5e438ec |
334 | /* |
335 | * If the hostname starts with "telnet:", set the |
336 | * protocol to Telnet and process the string as a |
337 | * Telnet URL. |
338 | */ |
339 | if (!strncmp(q, "telnet:", 7)) { |
340 | char c; |
341 | |
342 | q += 7; |
343 | if (q[0] == '/' && q[1] == '/') |
344 | q += 2; |
345 | cfg.protocol = PROT_TELNET; |
346 | p = q; |
347 | while (*p && *p != ':' && *p != '/') |
348 | p++; |
349 | c = *p; |
350 | if (*p) |
351 | *p++ = '\0'; |
352 | if (c == ':') |
353 | cfg.port = atoi(p); |
354 | else |
355 | cfg.port = -1; |
356 | strncpy(cfg.host, q, sizeof(cfg.host) - 1); |
357 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
358 | } else { |
359 | char *r; |
360 | /* |
361 | * Before we process the [user@]host string, we |
362 | * first check for the presence of a protocol |
363 | * prefix (a protocol name followed by ","). |
364 | */ |
365 | r = strchr(p, ','); |
366 | if (r) { |
367 | int i, j; |
368 | for (i = 0; backends[i].backend != NULL; i++) { |
369 | j = strlen(backends[i].name); |
370 | if (j == r - p && |
371 | !memcmp(backends[i].name, p, j)) { |
372 | default_protocol = cfg.protocol = |
373 | backends[i].protocol; |
374 | portnumber = |
375 | backends[i].backend->default_port; |
376 | p = r + 1; |
377 | break; |
378 | } |
379 | } |
380 | } |
381 | |
382 | /* |
383 | * Three cases. Either (a) there's a nonzero |
384 | * length string followed by an @, in which |
385 | * case that's user and the remainder is host. |
386 | * Or (b) there's only one string, not counting |
387 | * a potential initial @, and it exists in the |
388 | * saved-sessions database. Or (c) only one |
389 | * string and it _doesn't_ exist in the |
390 | * database. |
391 | */ |
392 | r = strrchr(p, '@'); |
393 | if (r == p) |
394 | p++, r = NULL; /* discount initial @ */ |
395 | if (r == NULL) { |
396 | /* |
397 | * One string. |
398 | */ |
399 | Config cfg2; |
400 | do_defaults(p, &cfg2); |
401 | if (cfg2.host[0] == '\0') { |
402 | /* No settings for this host; use defaults */ |
403 | strncpy(cfg.host, p, sizeof(cfg.host) - 1); |
404 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
405 | cfg.port = default_port; |
406 | } else { |
407 | cfg = cfg2; |
408 | cfg.remote_cmd_ptr = cfg.remote_cmd; |
409 | } |
410 | } else { |
411 | *r++ = '\0'; |
412 | strncpy(cfg.username, p, sizeof(cfg.username) - 1); |
413 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
414 | strncpy(cfg.host, r, sizeof(cfg.host) - 1); |
415 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
416 | cfg.port = default_port; |
417 | } |
418 | } |
419 | } else { |
420 | char *command; |
421 | int cmdlen, cmdsize; |
422 | cmdlen = cmdsize = 0; |
423 | command = NULL; |
424 | |
425 | while (argc) { |
426 | while (*p) { |
427 | if (cmdlen >= cmdsize) { |
428 | cmdsize = cmdlen + 512; |
429 | command = srealloc(command, cmdsize); |
430 | } |
431 | command[cmdlen++]=*p++; |
432 | } |
433 | if (cmdlen >= cmdsize) { |
434 | cmdsize = cmdlen + 512; |
435 | command = srealloc(command, cmdsize); |
436 | } |
437 | command[cmdlen++]=' '; /* always add trailing space */ |
438 | if (--argc) p = *++argv; |
439 | } |
440 | if (cmdlen) command[--cmdlen]='\0'; |
441 | /* change trailing blank to NUL */ |
442 | cfg.remote_cmd_ptr = command; |
443 | cfg.remote_cmd_ptr2 = NULL; |
444 | cfg.nopty = TRUE; /* command => no terminal */ |
445 | |
446 | break; /* done with cmdline */ |
447 | } |
448 | } |
449 | } |
450 | |
86256dc6 |
451 | if (errors) |
452 | return 1; |
453 | |
c5e438ec |
454 | if (!*cfg.host) { |
455 | usage(); |
456 | } |
457 | |
458 | /* |
459 | * Trim leading whitespace off the hostname if it's there. |
460 | */ |
461 | { |
462 | int space = strspn(cfg.host, " \t"); |
463 | memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space); |
464 | } |
465 | |
466 | /* See if host is of the form user@host */ |
467 | if (cfg.host[0] != '\0') { |
468 | char *atsign = strchr(cfg.host, '@'); |
469 | /* Make sure we're not overflowing the user field */ |
470 | if (atsign) { |
471 | if (atsign - cfg.host < sizeof cfg.username) { |
472 | strncpy(cfg.username, cfg.host, atsign - cfg.host); |
473 | cfg.username[atsign - cfg.host] = '\0'; |
474 | } |
475 | memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1)); |
476 | } |
477 | } |
478 | |
479 | /* |
480 | * Perform command-line overrides on session configuration. |
481 | */ |
482 | cmdline_run_saved(); |
483 | |
484 | /* |
485 | * Trim a colon suffix off the hostname if it's there. |
486 | */ |
487 | cfg.host[strcspn(cfg.host, ":")] = '\0'; |
488 | |
489 | /* |
490 | * Remove any remaining whitespace from the hostname. |
491 | */ |
492 | { |
493 | int p1 = 0, p2 = 0; |
494 | while (cfg.host[p2] != '\0') { |
495 | if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') { |
496 | cfg.host[p1] = cfg.host[p2]; |
497 | p1++; |
498 | } |
499 | p2++; |
500 | } |
501 | cfg.host[p1] = '\0'; |
502 | } |
503 | |
504 | if (!*cfg.remote_cmd_ptr) |
505 | flags |= FLAG_INTERACTIVE; |
506 | |
507 | /* |
508 | * Select protocol. This is farmed out into a table in a |
509 | * separate file to enable an ssh-free variant. |
510 | */ |
511 | { |
512 | int i; |
513 | back = NULL; |
514 | for (i = 0; backends[i].backend != NULL; i++) |
515 | if (backends[i].protocol == cfg.protocol) { |
516 | back = backends[i].backend; |
517 | break; |
518 | } |
519 | if (back == NULL) { |
520 | fprintf(stderr, |
521 | "Internal fault: Unsupported protocol found\n"); |
522 | return 1; |
523 | } |
524 | } |
525 | |
526 | /* |
527 | * Select port. |
528 | */ |
529 | if (portnumber != -1) |
530 | cfg.port = portnumber; |
531 | |
5673d44e |
532 | /* |
533 | * Set up the pipe we'll use to tell us about SIGWINCH. |
534 | */ |
535 | if (pipe(signalpipe) < 0) { |
536 | perror("pipe"); |
537 | exit(1); |
538 | } |
539 | putty_signal(SIGWINCH, sigwinch); |
540 | |
c5e438ec |
541 | sk_init(); |
542 | |
543 | /* |
544 | * Start up the connection. |
545 | */ |
a0e5ed33 |
546 | logctx = log_init(NULL); |
c5e438ec |
547 | { |
548 | char *error; |
549 | char *realhost; |
550 | /* nodelay is only useful if stdin is a terminal device */ |
551 | int nodelay = cfg.tcp_nodelay && isatty(0); |
552 | |
553 | error = back->init(NULL, &backhandle, cfg.host, cfg.port, |
554 | &realhost, nodelay); |
555 | if (error) { |
984992ef |
556 | fprintf(stderr, "Unable to open connection:\n%s\n", error); |
c5e438ec |
557 | return 1; |
558 | } |
c5e438ec |
559 | back->provide_logctx(backhandle, logctx); |
fe5634f6 |
560 | ldisc = ldisc_create(&cfg, NULL, back, backhandle, NULL); |
c5e438ec |
561 | sfree(realhost); |
562 | } |
563 | connopen = 1; |
564 | |
565 | /* |
566 | * Set up the initial console mode. We don't care if this call |
567 | * fails, because we know we aren't necessarily running in a |
568 | * console. |
569 | */ |
570 | tcgetattr(0, &orig_termios); |
571 | atexit(cleanup_termios); |
572 | ldisc_update(NULL, 1, 1); |
573 | sending = FALSE; |
574 | |
575 | while (1) { |
576 | fd_set rset, wset, xset; |
577 | int maxfd; |
578 | int rwx; |
579 | int ret; |
580 | |
581 | FD_ZERO(&rset); |
582 | FD_ZERO(&wset); |
583 | FD_ZERO(&xset); |
584 | maxfd = 0; |
585 | |
5673d44e |
586 | FD_SET_MAX(signalpipe[0], maxfd, rset); |
587 | |
c5e438ec |
588 | if (connopen && !sending && |
589 | back->socket(backhandle) != NULL && |
590 | back->sendok(backhandle) && |
591 | back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) { |
592 | /* If we're OK to send, then try to read from stdin. */ |
593 | FD_SET_MAX(0, maxfd, rset); |
594 | } |
595 | |
596 | if (bufchain_size(&stdout_data) > 0) { |
597 | /* If we have data for stdout, try to write to stdout. */ |
598 | FD_SET_MAX(1, maxfd, wset); |
599 | } |
600 | |
601 | if (bufchain_size(&stderr_data) > 0) { |
602 | /* If we have data for stderr, try to write to stderr. */ |
603 | FD_SET_MAX(2, maxfd, wset); |
604 | } |
605 | |
606 | /* Count the currently active sockets. */ |
607 | i = 0; |
608 | for (socket = first_socket(&socketstate, &rwx); socket >= 0; |
609 | socket = next_socket(&socketstate, &rwx)) i++; |
610 | |
611 | /* Expand the sklist buffer if necessary. */ |
612 | if (i > sksize) { |
613 | sksize = i + 16; |
614 | sklist = srealloc(sklist, sksize * sizeof(*sklist)); |
615 | } |
616 | |
617 | /* |
618 | * Add all currently open sockets to the select sets, and |
619 | * store them in sklist as well. |
620 | */ |
621 | skcount = 0; |
622 | for (socket = first_socket(&socketstate, &rwx); socket >= 0; |
623 | socket = next_socket(&socketstate, &rwx)) { |
624 | sklist[skcount++] = socket; |
625 | if (rwx & 1) |
626 | FD_SET_MAX(socket, maxfd, rset); |
627 | if (rwx & 2) |
628 | FD_SET_MAX(socket, maxfd, wset); |
629 | if (rwx & 4) |
630 | FD_SET_MAX(socket, maxfd, xset); |
631 | } |
632 | |
5673d44e |
633 | do { |
634 | ret = select(maxfd, &rset, &wset, &xset, NULL); |
635 | } while (ret < 0 && errno == EINTR); |
c5e438ec |
636 | |
637 | if (ret < 0) { |
638 | perror("select"); |
639 | exit(1); |
640 | } |
641 | |
642 | for (i = 0; i < skcount; i++) { |
643 | socket = sklist[i]; |
56e5b2db |
644 | /* |
645 | * We must process exceptional notifications before |
646 | * ordinary readability ones, or we may go straight |
647 | * past the urgent marker. |
648 | */ |
649 | if (FD_ISSET(socket, &xset)) |
650 | select_result(socket, 4); |
c5e438ec |
651 | if (FD_ISSET(socket, &rset)) |
652 | select_result(socket, 1); |
653 | if (FD_ISSET(socket, &wset)) |
654 | select_result(socket, 2); |
c5e438ec |
655 | } |
656 | |
5673d44e |
657 | if (FD_ISSET(signalpipe[0], &rset)) { |
658 | char c[1]; |
659 | struct winsize size; |
660 | read(signalpipe[0], c, 1); /* ignore its value; it'll be `x' */ |
661 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
662 | back->size(backhandle, size.ws_col, size.ws_row); |
663 | } |
664 | |
c5e438ec |
665 | if (FD_ISSET(0, &rset)) { |
666 | char buf[4096]; |
667 | int ret; |
668 | |
669 | if (connopen && back->socket(backhandle) != NULL) { |
670 | ret = read(0, buf, sizeof(buf)); |
671 | if (ret < 0) { |
672 | perror("stdin: read"); |
673 | exit(1); |
674 | } else if (ret == 0) { |
675 | back->special(backhandle, TS_EOF); |
676 | sending = FALSE; /* send nothing further after this */ |
677 | } else { |
678 | back->send(backhandle, buf, ret); |
679 | } |
680 | } |
681 | } |
682 | |
683 | if (FD_ISSET(1, &wset)) { |
684 | try_output(0); |
685 | } |
686 | |
687 | if (FD_ISSET(2, &wset)) { |
688 | try_output(1); |
689 | } |
690 | |
691 | if ((!connopen || back->socket(backhandle) == NULL) && |
692 | bufchain_size(&stdout_data) == 0 && |
693 | bufchain_size(&stderr_data) == 0) |
694 | break; /* we closed the connection */ |
695 | } |
696 | exitcode = back->exitcode(backhandle); |
697 | if (exitcode < 0) { |
698 | fprintf(stderr, "Remote process exit code unavailable\n"); |
699 | exitcode = 1; /* this is an error condition */ |
700 | } |
d9c40fd6 |
701 | cleanup_exit(exitcode); |
702 | return exitcode; /* shouldn't happen, but placates gcc */ |
c5e438ec |
703 | } |