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> |
2a6848cc |
16 | #include <sys/select.h> |
c5e438ec |
17 | |
c5e438ec |
18 | #define PUTTY_DO_GLOBALS /* actually _define_ globals */ |
19 | #include "putty.h" |
20 | #include "storage.h" |
21 | #include "tree234.h" |
22 | |
23 | #define MAX_STDIN_BACKLOG 4096 |
24 | |
25 | void fatalbox(char *p, ...) |
26 | { |
27 | va_list ap; |
28 | fprintf(stderr, "FATAL ERROR: "); |
29 | va_start(ap, p); |
30 | vfprintf(stderr, p, ap); |
31 | va_end(ap); |
32 | fputc('\n', stderr); |
33 | cleanup_exit(1); |
34 | } |
35 | void modalfatalbox(char *p, ...) |
36 | { |
37 | va_list ap; |
38 | fprintf(stderr, "FATAL ERROR: "); |
39 | va_start(ap, p); |
40 | vfprintf(stderr, p, ap); |
41 | va_end(ap); |
42 | fputc('\n', stderr); |
43 | cleanup_exit(1); |
44 | } |
45 | void connection_fatal(void *frontend, char *p, ...) |
46 | { |
47 | va_list ap; |
48 | fprintf(stderr, "FATAL ERROR: "); |
49 | va_start(ap, p); |
50 | vfprintf(stderr, p, ap); |
51 | va_end(ap); |
52 | fputc('\n', stderr); |
53 | cleanup_exit(1); |
54 | } |
55 | void cmdline_error(char *p, ...) |
56 | { |
57 | va_list ap; |
58 | fprintf(stderr, "plink: "); |
59 | va_start(ap, p); |
60 | vfprintf(stderr, p, ap); |
61 | va_end(ap); |
62 | fputc('\n', stderr); |
63 | exit(1); |
64 | } |
65 | |
c6ccd5c2 |
66 | static int local_tty = 0; /* do we have a local tty? */ |
67 | static struct termios orig_termios; |
c5e438ec |
68 | |
69 | static Backend *back; |
70 | static void *backhandle; |
3ea863a3 |
71 | static Config cfg; |
c5e438ec |
72 | |
5a9eb105 |
73 | /* |
74 | * Default settings that are specific to pterm. |
75 | */ |
c85623f9 |
76 | char *platform_default_s(const char *name) |
5a9eb105 |
77 | { |
5a9eb105 |
78 | if (!strcmp(name, "TermType")) |
799dfcfa |
79 | return dupstr(getenv("TERM")); |
80 | if (!strcmp(name, "UserName")) |
81 | return get_username(); |
5a9eb105 |
82 | return NULL; |
83 | } |
84 | |
c85623f9 |
85 | int platform_default_i(const char *name, int def) |
5a9eb105 |
86 | { |
87 | if (!strcmp(name, "TermWidth") || |
88 | !strcmp(name, "TermHeight")) { |
89 | struct winsize size; |
90 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
91 | return (!strcmp(name, "TermWidth") ? size.ws_col : size.ws_row); |
92 | } |
93 | return def; |
94 | } |
95 | |
9a30e26b |
96 | FontSpec platform_default_fontspec(const char *name) |
97 | { |
98 | FontSpec ret; |
99 | *ret.name = '\0'; |
100 | return ret; |
101 | } |
102 | |
103 | Filename platform_default_filename(const char *name) |
104 | { |
105 | Filename ret; |
106 | if (!strcmp(name, "LogFileName")) |
107 | strcpy(ret.path, "putty.log"); |
108 | else |
109 | *ret.path = '\0'; |
110 | return ret; |
111 | } |
112 | |
c85623f9 |
113 | char *x_get_default(const char *key) |
c5e438ec |
114 | { |
115 | return NULL; /* this is a stub */ |
116 | } |
117 | int term_ldisc(Terminal *term, int mode) |
118 | { |
119 | return FALSE; |
120 | } |
121 | void ldisc_update(void *frontend, int echo, int edit) |
122 | { |
123 | /* Update stdin read mode to reflect changes in line discipline. */ |
124 | struct termios mode; |
125 | |
c6ccd5c2 |
126 | if (!local_tty) return; |
127 | |
c5e438ec |
128 | mode = orig_termios; |
129 | |
130 | if (echo) |
131 | mode.c_lflag |= ECHO; |
132 | else |
133 | mode.c_lflag &= ~ECHO; |
134 | |
8cdf0e5f |
135 | if (edit) { |
136 | mode.c_iflag |= ICRNL; |
c5e438ec |
137 | mode.c_lflag |= ISIG | ICANON; |
8cdf0e5f |
138 | } else { |
139 | mode.c_iflag &= ~ICRNL; |
c5e438ec |
140 | mode.c_lflag &= ~(ISIG | ICANON); |
c6ccd5c2 |
141 | /* Solaris sets these to unhelpful values */ |
259d0428 |
142 | mode.c_cc[VMIN] = 1; |
143 | mode.c_cc[VTIME] = 0; |
c6ccd5c2 |
144 | /* FIXME: perhaps what we do with IXON/IXOFF should be an |
145 | * argument to ldisc_update(), to allow implementation of SSH-2 |
146 | * "xon-xoff" and Rlogin's equivalent? */ |
147 | mode.c_iflag &= ~IXON; |
148 | mode.c_iflag &= ~IXOFF; |
8cdf0e5f |
149 | } |
c5e438ec |
150 | |
151 | tcsetattr(0, TCSANOW, &mode); |
152 | } |
153 | |
c6ccd5c2 |
154 | /* Helper function to extract a special character from a termios. */ |
155 | static char *get_ttychar(struct termios *t, int index) |
156 | { |
157 | cc_t c = t->c_cc[index]; |
158 | #if defined(_POSIX_VDISABLE) |
159 | if (c == _POSIX_VDISABLE) |
160 | return dupprintf(""); |
161 | #endif |
162 | return dupprintf("^<%d>", c); |
163 | } |
164 | |
165 | char *get_ttymode(void *frontend, const char *mode) |
166 | { |
167 | /* |
168 | * Propagate appropriate terminal modes from the local terminal, |
169 | * if any. |
170 | */ |
171 | if (!local_tty) return NULL; |
172 | |
173 | #define GET_CHAR(ourname, uxname) \ |
174 | do { \ |
175 | if (strcmp(mode, ourname) == 0) \ |
176 | return get_ttychar(&orig_termios, uxname); \ |
177 | } while(0) |
178 | #define GET_BOOL(ourname, uxname, uxmemb, transform) \ |
179 | do { \ |
180 | if (strcmp(mode, ourname) == 0) { \ |
181 | int b = (orig_termios.uxmemb & uxname) != 0; \ |
182 | transform; \ |
183 | return dupprintf("%d", b); \ |
184 | } \ |
185 | } while (0) |
186 | |
187 | /* |
188 | * Modes that want to be the same on all terminal devices involved. |
189 | */ |
190 | /* All the special characters supported by SSH */ |
191 | #if defined(VINTR) |
192 | GET_CHAR("INTR", VINTR); |
193 | #endif |
194 | #if defined(VQUIT) |
195 | GET_CHAR("QUIT", VQUIT); |
196 | #endif |
197 | #if defined(VERASE) |
198 | GET_CHAR("ERASE", VERASE); |
199 | #endif |
200 | #if defined(VKILL) |
201 | GET_CHAR("KILL", VKILL); |
202 | #endif |
203 | #if defined(VEOF) |
204 | GET_CHAR("EOF", VEOF); |
205 | #endif |
206 | #if defined(VEOL) |
207 | GET_CHAR("EOL", VEOL); |
208 | #endif |
209 | #if defined(VEOL2) |
210 | GET_CHAR("EOL2", VEOL2); |
211 | #endif |
212 | #if defined(VSTART) |
213 | GET_CHAR("START", VSTART); |
214 | #endif |
215 | #if defined(VSTOP) |
216 | GET_CHAR("STOP", VSTOP); |
217 | #endif |
218 | #if defined(VSUSP) |
219 | GET_CHAR("SUSP", VSUSP); |
220 | #endif |
221 | #if defined(VDSUSP) |
222 | GET_CHAR("DSUSP", VDSUSP); |
223 | #endif |
224 | #if defined(VREPRINT) |
225 | GET_CHAR("REPRINT", VREPRINT); |
226 | #endif |
227 | #if defined(VWERASE) |
228 | GET_CHAR("WERASE", VWERASE); |
229 | #endif |
230 | #if defined(VLNEXT) |
231 | GET_CHAR("LNEXT", VLNEXT); |
232 | #endif |
233 | #if defined(VFLUSH) |
234 | GET_CHAR("FLUSH", VFLUSH); |
235 | #endif |
236 | #if defined(VSWTCH) |
237 | GET_CHAR("SWTCH", VSWTCH); |
238 | #endif |
239 | #if defined(VSTATUS) |
240 | GET_CHAR("STATUS", VSTATUS); |
241 | #endif |
242 | #if defined(VDISCARD) |
243 | GET_CHAR("DISCARD", VDISCARD); |
244 | #endif |
245 | /* Modes that "configure" other major modes. These should probably be |
246 | * considered as user preferences. */ |
247 | /* Configuration of ICANON */ |
248 | #if defined(ECHOK) |
249 | GET_BOOL("ECHOK", ECHOK, c_lflag, ); |
250 | #endif |
251 | #if defined(ECHOKE) |
252 | GET_BOOL("ECHOKE", ECHOKE, c_lflag, ); |
253 | #endif |
254 | #if defined(ECHOE) |
255 | GET_BOOL("ECHOE", ECHOE, c_lflag, ); |
256 | #endif |
257 | #if defined(ECHONL) |
258 | GET_BOOL("ECHONL", ECHONL, c_lflag, ); |
259 | #endif |
260 | #if defined(XCASE) |
261 | GET_BOOL("XCASE", XCASE, c_lflag, ); |
262 | #endif |
263 | /* Configuration of ECHO */ |
264 | #if defined(ECHOCTL) |
265 | GET_BOOL("ECHOCTL", ECHOCTL, c_lflag, ); |
266 | #endif |
267 | /* Configuration of IXON/IXOFF */ |
268 | #if defined(IXANY) |
269 | GET_BOOL("IXANY", IXANY, c_iflag, ); |
270 | #endif |
271 | |
272 | /* |
273 | * Modes that want to be set in only one place, and that we have |
274 | * squashed locally. |
275 | */ |
276 | #if defined(ISIG) |
277 | GET_BOOL("ISIG", ISIG, c_lflag, ); |
278 | #endif |
279 | #if defined(ICANON) |
280 | GET_BOOL("ICANON", ICANON, c_lflag, ); |
281 | #endif |
282 | #if defined(ECHO) |
283 | GET_BOOL("ECHO", ECHO, c_lflag, ); |
284 | #endif |
285 | #if defined(IXON) |
286 | GET_BOOL("IXON", IXON, c_iflag, ); |
287 | #endif |
288 | #if defined(IXOFF) |
289 | GET_BOOL("IXOFF", IXOFF, c_iflag, ); |
290 | #endif |
291 | |
292 | /* |
293 | * We do not propagate the following modes: |
294 | * - Parity/serial settings, which are a local affair and don't |
295 | * make sense propagated over SSH's 8-bit byte-stream. |
296 | * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD |
297 | * - Things that want to be enabled in one place that we don't |
298 | * squash locally. |
299 | * IUCLC OLCUC |
300 | * - Status bits. |
301 | * PENDIN |
302 | * - Things I don't know what to do with. (FIXME) |
303 | * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN OPOST |
304 | * INLCR IGNCR ICRNL ONLCR OCRNL ONOCR ONLRET |
305 | */ |
306 | |
307 | #undef GET_CHAR |
308 | #undef GET_BOOL |
309 | |
310 | /* Fall through to here for unrecognised names, or ones that are |
311 | * unsupported on this platform */ |
312 | return NULL; |
313 | } |
314 | |
c5e438ec |
315 | void cleanup_termios(void) |
316 | { |
c6ccd5c2 |
317 | if (local_tty) |
318 | tcsetattr(0, TCSANOW, &orig_termios); |
c5e438ec |
319 | } |
320 | |
321 | bufchain stdout_data, stderr_data; |
322 | |
323 | void try_output(int is_stderr) |
324 | { |
325 | bufchain *chain = (is_stderr ? &stderr_data : &stdout_data); |
326 | int fd = (is_stderr ? 2 : 1); |
327 | void *senddata; |
328 | int sendlen, ret; |
329 | |
d69a46c0 |
330 | if (bufchain_size(chain) == 0) |
331 | return; |
332 | |
c5e438ec |
333 | bufchain_prefix(chain, &senddata, &sendlen); |
334 | ret = write(fd, senddata, sendlen); |
335 | if (ret > 0) |
336 | bufchain_consume(chain, ret); |
337 | else if (ret < 0) { |
338 | perror(is_stderr ? "stderr: write" : "stdout: write"); |
339 | exit(1); |
340 | } |
341 | } |
342 | |
9fab77dc |
343 | int from_backend(void *frontend_handle, int is_stderr, |
344 | const char *data, int len) |
c5e438ec |
345 | { |
346 | int osize, esize; |
347 | |
c5e438ec |
348 | if (is_stderr) { |
349 | bufchain_add(&stderr_data, data, len); |
350 | try_output(1); |
351 | } else { |
352 | bufchain_add(&stdout_data, data, len); |
353 | try_output(0); |
354 | } |
355 | |
356 | osize = bufchain_size(&stdout_data); |
357 | esize = bufchain_size(&stderr_data); |
358 | |
359 | return osize + esize; |
360 | } |
361 | |
5673d44e |
362 | int signalpipe[2]; |
363 | |
364 | void sigwinch(int signum) |
365 | { |
366 | write(signalpipe[1], "x", 1); |
367 | } |
368 | |
c5e438ec |
369 | /* |
74aca06d |
370 | * In Plink our selects are synchronous, so these functions are |
371 | * empty stubs. |
372 | */ |
373 | int uxsel_input_add(int fd, int rwx) { return 0; } |
374 | void uxsel_input_remove(int id) { } |
375 | |
376 | /* |
c5e438ec |
377 | * Short description of parameters. |
378 | */ |
379 | static void usage(void) |
380 | { |
381 | printf("PuTTY Link: command-line connection utility\n"); |
382 | printf("%s\n", ver); |
383 | printf("Usage: plink [options] [user@]host [command]\n"); |
384 | printf(" (\"host\" can also be a PuTTY saved session name)\n"); |
385 | printf("Options:\n"); |
2285d016 |
386 | printf(" -V print version information and exit\n"); |
387 | printf(" -pgpfp print PGP key fingerprints and exit\n"); |
c5e438ec |
388 | printf(" -v show verbose messages\n"); |
389 | printf(" -load sessname Load settings from saved session\n"); |
390 | printf(" -ssh -telnet -rlogin -raw\n"); |
afd4d0d2 |
391 | printf(" force use of a particular protocol\n"); |
c5e438ec |
392 | printf(" -P port connect to specified port\n"); |
393 | printf(" -l user connect with specified username\n"); |
c5e438ec |
394 | printf(" -batch disable all interactive prompts\n"); |
395 | printf("The following options only apply to SSH connections:\n"); |
396 | printf(" -pw passw login with specified password\n"); |
dbe6c525 |
397 | printf(" -D [listen-IP:]listen-port\n"); |
398 | printf(" Dynamic SOCKS-based port forwarding\n"); |
399 | printf(" -L [listen-IP:]listen-port:host:port\n"); |
400 | printf(" Forward local port to remote address\n"); |
401 | printf(" -R [listen-IP:]listen-port:host:port\n"); |
402 | printf(" Forward remote port to local address\n"); |
c5e438ec |
403 | printf(" -X -x enable / disable X11 forwarding\n"); |
404 | printf(" -A -a enable / disable agent forwarding\n"); |
405 | printf(" -t -T enable / disable pty allocation\n"); |
406 | printf(" -1 -2 force use of particular protocol version\n"); |
05581745 |
407 | printf(" -4 -6 force use of IPv4 or IPv6\n"); |
c5e438ec |
408 | printf(" -C enable compression\n"); |
409 | printf(" -i key private key file for authentication\n"); |
54018d95 |
410 | printf(" -m file read remote command(s) from file\n"); |
09bdfcbb |
411 | printf(" -s remote command is an SSH subsystem (SSH-2 only)\n"); |
b72c366d |
412 | printf(" -N don't start a shell/command (SSH-2 only)\n"); |
dc108ebc |
413 | exit(1); |
414 | } |
415 | |
416 | static void version(void) |
417 | { |
418 | printf("plink: %s\n", ver); |
c5e438ec |
419 | exit(1); |
420 | } |
421 | |
422 | int main(int argc, char **argv) |
423 | { |
424 | int sending; |
425 | int portnumber = -1; |
0ff9ea38 |
426 | int *fdlist; |
427 | int fd; |
428 | int i, fdcount, fdsize, fdstate; |
c5e438ec |
429 | int connopen; |
430 | int exitcode; |
86256dc6 |
431 | int errors; |
09bdfcbb |
432 | int use_subsystem = 0; |
b51259f6 |
433 | void *ldisc, *logctx; |
39934deb |
434 | long now; |
c5e438ec |
435 | |
436 | ssh_get_line = console_get_line; |
437 | |
0ff9ea38 |
438 | fdlist = NULL; |
439 | fdcount = fdsize = 0; |
c5e438ec |
440 | /* |
441 | * Initialise port and protocol to sensible defaults. (These |
442 | * will be overridden by more or less anything.) |
443 | */ |
444 | default_protocol = PROT_SSH; |
445 | default_port = 22; |
446 | |
447 | flags = FLAG_STDERR; |
448 | /* |
449 | * Process the command line. |
450 | */ |
451 | do_defaults(NULL, &cfg); |
18e62ad8 |
452 | loaded_session = FALSE; |
c5e438ec |
453 | default_protocol = cfg.protocol; |
454 | default_port = cfg.port; |
86256dc6 |
455 | errors = 0; |
c5e438ec |
456 | { |
457 | /* |
458 | * Override the default protocol if PLINK_PROTOCOL is set. |
459 | */ |
460 | char *p = getenv("PLINK_PROTOCOL"); |
461 | int i; |
462 | if (p) { |
463 | for (i = 0; backends[i].backend != NULL; i++) { |
464 | if (!strcmp(backends[i].name, p)) { |
465 | default_protocol = cfg.protocol = backends[i].protocol; |
466 | default_port = cfg.port = |
467 | backends[i].backend->default_port; |
468 | break; |
469 | } |
470 | } |
471 | } |
472 | } |
473 | while (--argc) { |
474 | char *p = *++argv; |
475 | if (*p == '-') { |
9b41d3a8 |
476 | int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL), |
477 | 1, &cfg); |
c5e438ec |
478 | if (ret == -2) { |
479 | fprintf(stderr, |
480 | "plink: option \"%s\" requires an argument\n", p); |
86256dc6 |
481 | errors = 1; |
c5e438ec |
482 | } else if (ret == 2) { |
483 | --argc, ++argv; |
484 | } else if (ret == 1) { |
485 | continue; |
486 | } else if (!strcmp(p, "-batch")) { |
487 | console_batch_mode = 1; |
09bdfcbb |
488 | } else if (!strcmp(p, "-s")) { |
489 | /* Save status to write to cfg later. */ |
490 | use_subsystem = 1; |
dc108ebc |
491 | } else if (!strcmp(p, "-V")) { |
492 | version(); |
2285d016 |
493 | } else if (!strcmp(p, "-pgpfp")) { |
494 | pgp_fingerprints(); |
495 | exit(1); |
a0e5ed33 |
496 | } else if (!strcmp(p, "-o")) { |
86256dc6 |
497 | if (argc <= 1) { |
a0e5ed33 |
498 | fprintf(stderr, |
499 | "plink: option \"-o\" requires an argument\n"); |
86256dc6 |
500 | errors = 1; |
501 | } else { |
502 | --argc; |
503 | provide_xrm_string(*++argv); |
504 | } |
505 | } else { |
506 | fprintf(stderr, "plink: unknown option \"%s\"\n", p); |
507 | errors = 1; |
c5e438ec |
508 | } |
509 | } else if (*p) { |
510 | if (!*cfg.host) { |
511 | char *q = p; |
a0e5ed33 |
512 | |
513 | do_defaults(NULL, &cfg); |
514 | |
c5e438ec |
515 | /* |
516 | * If the hostname starts with "telnet:", set the |
517 | * protocol to Telnet and process the string as a |
518 | * Telnet URL. |
519 | */ |
520 | if (!strncmp(q, "telnet:", 7)) { |
521 | char c; |
522 | |
523 | q += 7; |
524 | if (q[0] == '/' && q[1] == '/') |
525 | q += 2; |
526 | cfg.protocol = PROT_TELNET; |
527 | p = q; |
528 | while (*p && *p != ':' && *p != '/') |
529 | p++; |
530 | c = *p; |
531 | if (*p) |
532 | *p++ = '\0'; |
533 | if (c == ':') |
534 | cfg.port = atoi(p); |
535 | else |
536 | cfg.port = -1; |
537 | strncpy(cfg.host, q, sizeof(cfg.host) - 1); |
538 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
539 | } else { |
3608528b |
540 | char *r, *user, *host; |
c5e438ec |
541 | /* |
542 | * Before we process the [user@]host string, we |
543 | * first check for the presence of a protocol |
544 | * prefix (a protocol name followed by ","). |
545 | */ |
546 | r = strchr(p, ','); |
547 | if (r) { |
548 | int i, j; |
549 | for (i = 0; backends[i].backend != NULL; i++) { |
550 | j = strlen(backends[i].name); |
551 | if (j == r - p && |
552 | !memcmp(backends[i].name, p, j)) { |
553 | default_protocol = cfg.protocol = |
554 | backends[i].protocol; |
555 | portnumber = |
556 | backends[i].backend->default_port; |
557 | p = r + 1; |
558 | break; |
559 | } |
560 | } |
561 | } |
562 | |
563 | /* |
3608528b |
564 | * A nonzero length string followed by an @ is treated |
565 | * as a username. (We discount an _initial_ @.) The |
566 | * rest of the string (or the whole string if no @) |
567 | * is treated as a session name and/or hostname. |
c5e438ec |
568 | */ |
569 | r = strrchr(p, '@'); |
570 | if (r == p) |
571 | p++, r = NULL; /* discount initial @ */ |
3608528b |
572 | if (r) { |
573 | *r++ = '\0'; |
574 | user = p, host = r; |
575 | } else { |
576 | user = NULL, host = p; |
577 | } |
578 | |
579 | /* |
580 | * Now attempt to load a saved session with the |
581 | * same name as the hostname. |
582 | */ |
583 | { |
c5e438ec |
584 | Config cfg2; |
3608528b |
585 | do_defaults(host, &cfg2); |
18e62ad8 |
586 | if (loaded_session || cfg2.host[0] == '\0') { |
c5e438ec |
587 | /* No settings for this host; use defaults */ |
18e62ad8 |
588 | /* (or session was already loaded with -load) */ |
3608528b |
589 | strncpy(cfg.host, host, sizeof(cfg.host) - 1); |
c5e438ec |
590 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
591 | cfg.port = default_port; |
592 | } else { |
593 | cfg = cfg2; |
c5e438ec |
594 | } |
3608528b |
595 | } |
596 | |
597 | if (user) { |
598 | /* Patch in specified username. */ |
599 | strncpy(cfg.username, user, |
600 | sizeof(cfg.username) - 1); |
c5e438ec |
601 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
c5e438ec |
602 | } |
3608528b |
603 | |
c5e438ec |
604 | } |
605 | } else { |
606 | char *command; |
607 | int cmdlen, cmdsize; |
608 | cmdlen = cmdsize = 0; |
609 | command = NULL; |
610 | |
611 | while (argc) { |
612 | while (*p) { |
613 | if (cmdlen >= cmdsize) { |
614 | cmdsize = cmdlen + 512; |
3d88e64d |
615 | command = sresize(command, cmdsize, char); |
c5e438ec |
616 | } |
617 | command[cmdlen++]=*p++; |
618 | } |
619 | if (cmdlen >= cmdsize) { |
620 | cmdsize = cmdlen + 512; |
3d88e64d |
621 | command = sresize(command, cmdsize, char); |
c5e438ec |
622 | } |
623 | command[cmdlen++]=' '; /* always add trailing space */ |
624 | if (--argc) p = *++argv; |
625 | } |
626 | if (cmdlen) command[--cmdlen]='\0'; |
627 | /* change trailing blank to NUL */ |
628 | cfg.remote_cmd_ptr = command; |
629 | cfg.remote_cmd_ptr2 = NULL; |
630 | cfg.nopty = TRUE; /* command => no terminal */ |
631 | |
632 | break; /* done with cmdline */ |
633 | } |
634 | } |
635 | } |
636 | |
86256dc6 |
637 | if (errors) |
638 | return 1; |
639 | |
c5e438ec |
640 | if (!*cfg.host) { |
641 | usage(); |
642 | } |
643 | |
644 | /* |
645 | * Trim leading whitespace off the hostname if it's there. |
646 | */ |
647 | { |
648 | int space = strspn(cfg.host, " \t"); |
649 | memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space); |
650 | } |
651 | |
652 | /* See if host is of the form user@host */ |
653 | if (cfg.host[0] != '\0') { |
5dd103a8 |
654 | char *atsign = strrchr(cfg.host, '@'); |
c5e438ec |
655 | /* Make sure we're not overflowing the user field */ |
656 | if (atsign) { |
657 | if (atsign - cfg.host < sizeof cfg.username) { |
658 | strncpy(cfg.username, cfg.host, atsign - cfg.host); |
659 | cfg.username[atsign - cfg.host] = '\0'; |
660 | } |
661 | memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1)); |
662 | } |
663 | } |
664 | |
665 | /* |
666 | * Perform command-line overrides on session configuration. |
667 | */ |
9b41d3a8 |
668 | cmdline_run_saved(&cfg); |
c5e438ec |
669 | |
670 | /* |
09bdfcbb |
671 | * Apply subsystem status. |
672 | */ |
673 | if (use_subsystem) |
674 | cfg.ssh_subsys = TRUE; |
675 | |
676 | /* |
c5e438ec |
677 | * Trim a colon suffix off the hostname if it's there. |
678 | */ |
679 | cfg.host[strcspn(cfg.host, ":")] = '\0'; |
680 | |
681 | /* |
682 | * Remove any remaining whitespace from the hostname. |
683 | */ |
684 | { |
685 | int p1 = 0, p2 = 0; |
686 | while (cfg.host[p2] != '\0') { |
687 | if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') { |
688 | cfg.host[p1] = cfg.host[p2]; |
689 | p1++; |
690 | } |
691 | p2++; |
692 | } |
693 | cfg.host[p1] = '\0'; |
694 | } |
695 | |
a79e1969 |
696 | if (!cfg.remote_cmd_ptr && !*cfg.remote_cmd) |
c5e438ec |
697 | flags |= FLAG_INTERACTIVE; |
698 | |
699 | /* |
700 | * Select protocol. This is farmed out into a table in a |
701 | * separate file to enable an ssh-free variant. |
702 | */ |
703 | { |
704 | int i; |
705 | back = NULL; |
706 | for (i = 0; backends[i].backend != NULL; i++) |
707 | if (backends[i].protocol == cfg.protocol) { |
708 | back = backends[i].backend; |
709 | break; |
710 | } |
711 | if (back == NULL) { |
712 | fprintf(stderr, |
713 | "Internal fault: Unsupported protocol found\n"); |
714 | return 1; |
715 | } |
716 | } |
717 | |
718 | /* |
719 | * Select port. |
720 | */ |
721 | if (portnumber != -1) |
722 | cfg.port = portnumber; |
723 | |
5673d44e |
724 | /* |
725 | * Set up the pipe we'll use to tell us about SIGWINCH. |
726 | */ |
727 | if (pipe(signalpipe) < 0) { |
728 | perror("pipe"); |
729 | exit(1); |
730 | } |
731 | putty_signal(SIGWINCH, sigwinch); |
732 | |
c5e438ec |
733 | sk_init(); |
0ff9ea38 |
734 | uxsel_init(); |
c5e438ec |
735 | |
736 | /* |
737 | * Start up the connection. |
738 | */ |
c229ef97 |
739 | logctx = log_init(NULL, &cfg); |
b51259f6 |
740 | console_provide_logctx(logctx); |
c5e438ec |
741 | { |
cbe2d68f |
742 | const char *error; |
c5e438ec |
743 | char *realhost; |
744 | /* nodelay is only useful if stdin is a terminal device */ |
745 | int nodelay = cfg.tcp_nodelay && isatty(0); |
746 | |
86916870 |
747 | error = back->init(NULL, &backhandle, &cfg, cfg.host, cfg.port, |
79bf227b |
748 | &realhost, nodelay, cfg.tcp_keepalives); |
c5e438ec |
749 | if (error) { |
984992ef |
750 | fprintf(stderr, "Unable to open connection:\n%s\n", error); |
c5e438ec |
751 | return 1; |
752 | } |
c5e438ec |
753 | back->provide_logctx(backhandle, logctx); |
fe5634f6 |
754 | ldisc = ldisc_create(&cfg, NULL, back, backhandle, NULL); |
c5e438ec |
755 | sfree(realhost); |
756 | } |
757 | connopen = 1; |
758 | |
759 | /* |
760 | * Set up the initial console mode. We don't care if this call |
761 | * fails, because we know we aren't necessarily running in a |
762 | * console. |
763 | */ |
c6ccd5c2 |
764 | local_tty = (tcgetattr(0, &orig_termios) == 0); |
c5e438ec |
765 | atexit(cleanup_termios); |
766 | ldisc_update(NULL, 1, 1); |
767 | sending = FALSE; |
39934deb |
768 | now = GETTICKCOUNT(); |
c5e438ec |
769 | |
770 | while (1) { |
771 | fd_set rset, wset, xset; |
772 | int maxfd; |
773 | int rwx; |
774 | int ret; |
775 | |
776 | FD_ZERO(&rset); |
777 | FD_ZERO(&wset); |
778 | FD_ZERO(&xset); |
779 | maxfd = 0; |
780 | |
5673d44e |
781 | FD_SET_MAX(signalpipe[0], maxfd, rset); |
782 | |
c5e438ec |
783 | if (connopen && !sending && |
784 | back->socket(backhandle) != NULL && |
785 | back->sendok(backhandle) && |
786 | back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) { |
787 | /* If we're OK to send, then try to read from stdin. */ |
788 | FD_SET_MAX(0, maxfd, rset); |
789 | } |
790 | |
791 | if (bufchain_size(&stdout_data) > 0) { |
792 | /* If we have data for stdout, try to write to stdout. */ |
793 | FD_SET_MAX(1, maxfd, wset); |
794 | } |
795 | |
796 | if (bufchain_size(&stderr_data) > 0) { |
797 | /* If we have data for stderr, try to write to stderr. */ |
798 | FD_SET_MAX(2, maxfd, wset); |
799 | } |
800 | |
0ff9ea38 |
801 | /* Count the currently active fds. */ |
c5e438ec |
802 | i = 0; |
0ff9ea38 |
803 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
804 | fd = next_fd(&fdstate, &rwx)) i++; |
c5e438ec |
805 | |
0ff9ea38 |
806 | /* Expand the fdlist buffer if necessary. */ |
807 | if (i > fdsize) { |
808 | fdsize = i + 16; |
809 | fdlist = sresize(fdlist, fdsize, int); |
c5e438ec |
810 | } |
811 | |
812 | /* |
0ff9ea38 |
813 | * Add all currently open fds to the select sets, and store |
814 | * them in fdlist as well. |
c5e438ec |
815 | */ |
0ff9ea38 |
816 | fdcount = 0; |
817 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
818 | fd = next_fd(&fdstate, &rwx)) { |
819 | fdlist[fdcount++] = fd; |
c5e438ec |
820 | if (rwx & 1) |
0ff9ea38 |
821 | FD_SET_MAX(fd, maxfd, rset); |
c5e438ec |
822 | if (rwx & 2) |
0ff9ea38 |
823 | FD_SET_MAX(fd, maxfd, wset); |
c5e438ec |
824 | if (rwx & 4) |
0ff9ea38 |
825 | FD_SET_MAX(fd, maxfd, xset); |
c5e438ec |
826 | } |
827 | |
5673d44e |
828 | do { |
39934deb |
829 | long next, ticks; |
830 | struct timeval tv, *ptv; |
831 | |
832 | if (run_timers(now, &next)) { |
833 | ticks = next - GETTICKCOUNT(); |
834 | if (ticks < 0) ticks = 0; /* just in case */ |
835 | tv.tv_sec = ticks / 1000; |
836 | tv.tv_usec = ticks % 1000 * 1000; |
837 | ptv = &tv; |
838 | } else { |
839 | ptv = NULL; |
840 | } |
841 | ret = select(maxfd, &rset, &wset, &xset, ptv); |
842 | if (ret == 0) |
843 | now = next; |
2ac3322e |
844 | else { |
845 | long newnow = GETTICKCOUNT(); |
846 | /* |
847 | * Check to see whether the system clock has |
848 | * changed massively during the select. |
849 | */ |
850 | if (newnow - now < 0 || newnow - now > next - now) { |
851 | /* |
852 | * If so, look at the elapsed time in the |
853 | * select and use it to compute a new |
854 | * tickcount_offset. |
855 | */ |
856 | long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000; |
857 | /* So we'd like GETTICKCOUNT to have returned othernow, |
858 | * but instead it return newnow. Hence ... */ |
859 | tickcount_offset += othernow - newnow; |
860 | now = othernow; |
861 | } else { |
862 | now = newnow; |
863 | } |
864 | } |
5673d44e |
865 | } while (ret < 0 && errno == EINTR); |
c5e438ec |
866 | |
867 | if (ret < 0) { |
868 | perror("select"); |
869 | exit(1); |
870 | } |
871 | |
0ff9ea38 |
872 | for (i = 0; i < fdcount; i++) { |
873 | fd = fdlist[i]; |
56e5b2db |
874 | /* |
875 | * We must process exceptional notifications before |
876 | * ordinary readability ones, or we may go straight |
877 | * past the urgent marker. |
878 | */ |
0ff9ea38 |
879 | if (FD_ISSET(fd, &xset)) |
880 | select_result(fd, 4); |
881 | if (FD_ISSET(fd, &rset)) |
882 | select_result(fd, 1); |
883 | if (FD_ISSET(fd, &wset)) |
884 | select_result(fd, 2); |
c5e438ec |
885 | } |
886 | |
5673d44e |
887 | if (FD_ISSET(signalpipe[0], &rset)) { |
888 | char c[1]; |
889 | struct winsize size; |
890 | read(signalpipe[0], c, 1); /* ignore its value; it'll be `x' */ |
891 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
892 | back->size(backhandle, size.ws_col, size.ws_row); |
893 | } |
894 | |
c5e438ec |
895 | if (FD_ISSET(0, &rset)) { |
896 | char buf[4096]; |
897 | int ret; |
898 | |
899 | if (connopen && back->socket(backhandle) != NULL) { |
900 | ret = read(0, buf, sizeof(buf)); |
901 | if (ret < 0) { |
902 | perror("stdin: read"); |
903 | exit(1); |
904 | } else if (ret == 0) { |
905 | back->special(backhandle, TS_EOF); |
906 | sending = FALSE; /* send nothing further after this */ |
907 | } else { |
908 | back->send(backhandle, buf, ret); |
909 | } |
910 | } |
911 | } |
912 | |
913 | if (FD_ISSET(1, &wset)) { |
914 | try_output(0); |
915 | } |
916 | |
917 | if (FD_ISSET(2, &wset)) { |
918 | try_output(1); |
919 | } |
920 | |
921 | if ((!connopen || back->socket(backhandle) == NULL) && |
922 | bufchain_size(&stdout_data) == 0 && |
923 | bufchain_size(&stderr_data) == 0) |
924 | break; /* we closed the connection */ |
925 | } |
926 | exitcode = back->exitcode(backhandle); |
927 | if (exitcode < 0) { |
928 | fprintf(stderr, "Remote process exit code unavailable\n"); |
929 | exitcode = 1; /* this is an error condition */ |
930 | } |
d9c40fd6 |
931 | cleanup_exit(exitcode); |
932 | return exitcode; /* shouldn't happen, but placates gcc */ |
c5e438ec |
933 | } |