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; |
e8269d30 |
138 | mode.c_oflag |= OPOST; |
8cdf0e5f |
139 | } else { |
140 | mode.c_iflag &= ~ICRNL; |
c5e438ec |
141 | mode.c_lflag &= ~(ISIG | ICANON); |
e8269d30 |
142 | mode.c_oflag &= ~OPOST; |
c6ccd5c2 |
143 | /* Solaris sets these to unhelpful values */ |
259d0428 |
144 | mode.c_cc[VMIN] = 1; |
145 | mode.c_cc[VTIME] = 0; |
c6ccd5c2 |
146 | /* FIXME: perhaps what we do with IXON/IXOFF should be an |
147 | * argument to ldisc_update(), to allow implementation of SSH-2 |
148 | * "xon-xoff" and Rlogin's equivalent? */ |
149 | mode.c_iflag &= ~IXON; |
150 | mode.c_iflag &= ~IXOFF; |
8cdf0e5f |
151 | } |
c5e438ec |
152 | |
153 | tcsetattr(0, TCSANOW, &mode); |
154 | } |
155 | |
c6ccd5c2 |
156 | /* Helper function to extract a special character from a termios. */ |
157 | static char *get_ttychar(struct termios *t, int index) |
158 | { |
159 | cc_t c = t->c_cc[index]; |
160 | #if defined(_POSIX_VDISABLE) |
161 | if (c == _POSIX_VDISABLE) |
162 | return dupprintf(""); |
163 | #endif |
164 | return dupprintf("^<%d>", c); |
165 | } |
166 | |
167 | char *get_ttymode(void *frontend, const char *mode) |
168 | { |
169 | /* |
170 | * Propagate appropriate terminal modes from the local terminal, |
171 | * if any. |
172 | */ |
173 | if (!local_tty) return NULL; |
174 | |
175 | #define GET_CHAR(ourname, uxname) \ |
176 | do { \ |
177 | if (strcmp(mode, ourname) == 0) \ |
178 | return get_ttychar(&orig_termios, uxname); \ |
179 | } while(0) |
180 | #define GET_BOOL(ourname, uxname, uxmemb, transform) \ |
181 | do { \ |
182 | if (strcmp(mode, ourname) == 0) { \ |
183 | int b = (orig_termios.uxmemb & uxname) != 0; \ |
184 | transform; \ |
185 | return dupprintf("%d", b); \ |
186 | } \ |
187 | } while (0) |
188 | |
189 | /* |
190 | * Modes that want to be the same on all terminal devices involved. |
191 | */ |
192 | /* All the special characters supported by SSH */ |
193 | #if defined(VINTR) |
194 | GET_CHAR("INTR", VINTR); |
195 | #endif |
196 | #if defined(VQUIT) |
197 | GET_CHAR("QUIT", VQUIT); |
198 | #endif |
199 | #if defined(VERASE) |
200 | GET_CHAR("ERASE", VERASE); |
201 | #endif |
202 | #if defined(VKILL) |
203 | GET_CHAR("KILL", VKILL); |
204 | #endif |
205 | #if defined(VEOF) |
206 | GET_CHAR("EOF", VEOF); |
207 | #endif |
208 | #if defined(VEOL) |
209 | GET_CHAR("EOL", VEOL); |
210 | #endif |
211 | #if defined(VEOL2) |
212 | GET_CHAR("EOL2", VEOL2); |
213 | #endif |
214 | #if defined(VSTART) |
215 | GET_CHAR("START", VSTART); |
216 | #endif |
217 | #if defined(VSTOP) |
218 | GET_CHAR("STOP", VSTOP); |
219 | #endif |
220 | #if defined(VSUSP) |
221 | GET_CHAR("SUSP", VSUSP); |
222 | #endif |
223 | #if defined(VDSUSP) |
224 | GET_CHAR("DSUSP", VDSUSP); |
225 | #endif |
226 | #if defined(VREPRINT) |
227 | GET_CHAR("REPRINT", VREPRINT); |
228 | #endif |
229 | #if defined(VWERASE) |
230 | GET_CHAR("WERASE", VWERASE); |
231 | #endif |
232 | #if defined(VLNEXT) |
233 | GET_CHAR("LNEXT", VLNEXT); |
234 | #endif |
235 | #if defined(VFLUSH) |
236 | GET_CHAR("FLUSH", VFLUSH); |
237 | #endif |
238 | #if defined(VSWTCH) |
239 | GET_CHAR("SWTCH", VSWTCH); |
240 | #endif |
241 | #if defined(VSTATUS) |
242 | GET_CHAR("STATUS", VSTATUS); |
243 | #endif |
244 | #if defined(VDISCARD) |
245 | GET_CHAR("DISCARD", VDISCARD); |
246 | #endif |
247 | /* Modes that "configure" other major modes. These should probably be |
248 | * considered as user preferences. */ |
249 | /* Configuration of ICANON */ |
250 | #if defined(ECHOK) |
251 | GET_BOOL("ECHOK", ECHOK, c_lflag, ); |
252 | #endif |
253 | #if defined(ECHOKE) |
254 | GET_BOOL("ECHOKE", ECHOKE, c_lflag, ); |
255 | #endif |
256 | #if defined(ECHOE) |
257 | GET_BOOL("ECHOE", ECHOE, c_lflag, ); |
258 | #endif |
259 | #if defined(ECHONL) |
260 | GET_BOOL("ECHONL", ECHONL, c_lflag, ); |
261 | #endif |
262 | #if defined(XCASE) |
263 | GET_BOOL("XCASE", XCASE, c_lflag, ); |
264 | #endif |
265 | /* Configuration of ECHO */ |
266 | #if defined(ECHOCTL) |
267 | GET_BOOL("ECHOCTL", ECHOCTL, c_lflag, ); |
268 | #endif |
269 | /* Configuration of IXON/IXOFF */ |
270 | #if defined(IXANY) |
271 | GET_BOOL("IXANY", IXANY, c_iflag, ); |
272 | #endif |
e8269d30 |
273 | /* Configuration of OPOST */ |
274 | #if defined(ONLCR) |
275 | GET_BOOL("ONLCR", ONLCR, c_oflag, ); |
276 | #endif |
277 | #if defined(OCRNL) |
278 | GET_BOOL("OCRNL", OCRNL, c_oflag, ); |
279 | #endif |
280 | #if defined(ONOCR) |
281 | GET_BOOL("ONOCR", ONOCR, c_oflag, ); |
282 | #endif |
283 | #if defined(ONLCR) |
284 | GET_BOOL("ONLRET", ONLRET, c_oflag, ); |
285 | #endif |
c6ccd5c2 |
286 | |
287 | /* |
288 | * Modes that want to be set in only one place, and that we have |
289 | * squashed locally. |
290 | */ |
291 | #if defined(ISIG) |
292 | GET_BOOL("ISIG", ISIG, c_lflag, ); |
293 | #endif |
294 | #if defined(ICANON) |
295 | GET_BOOL("ICANON", ICANON, c_lflag, ); |
296 | #endif |
297 | #if defined(ECHO) |
298 | GET_BOOL("ECHO", ECHO, c_lflag, ); |
299 | #endif |
300 | #if defined(IXON) |
301 | GET_BOOL("IXON", IXON, c_iflag, ); |
302 | #endif |
303 | #if defined(IXOFF) |
304 | GET_BOOL("IXOFF", IXOFF, c_iflag, ); |
305 | #endif |
e8269d30 |
306 | #if defined(OPOST) |
307 | GET_BOOL("OPOST", OPOST, c_oflag, ); |
308 | #endif |
c6ccd5c2 |
309 | |
310 | /* |
311 | * We do not propagate the following modes: |
312 | * - Parity/serial settings, which are a local affair and don't |
313 | * make sense propagated over SSH's 8-bit byte-stream. |
314 | * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD |
315 | * - Things that want to be enabled in one place that we don't |
316 | * squash locally. |
317 | * IUCLC OLCUC |
318 | * - Status bits. |
319 | * PENDIN |
320 | * - Things I don't know what to do with. (FIXME) |
e8269d30 |
321 | * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN |
322 | * INLCR IGNCR ICRNL |
c6ccd5c2 |
323 | */ |
324 | |
325 | #undef GET_CHAR |
326 | #undef GET_BOOL |
327 | |
328 | /* Fall through to here for unrecognised names, or ones that are |
329 | * unsupported on this platform */ |
330 | return NULL; |
331 | } |
332 | |
c5e438ec |
333 | void cleanup_termios(void) |
334 | { |
c6ccd5c2 |
335 | if (local_tty) |
336 | tcsetattr(0, TCSANOW, &orig_termios); |
c5e438ec |
337 | } |
338 | |
339 | bufchain stdout_data, stderr_data; |
340 | |
341 | void try_output(int is_stderr) |
342 | { |
343 | bufchain *chain = (is_stderr ? &stderr_data : &stdout_data); |
344 | int fd = (is_stderr ? 2 : 1); |
345 | void *senddata; |
346 | int sendlen, ret; |
347 | |
d69a46c0 |
348 | if (bufchain_size(chain) == 0) |
349 | return; |
350 | |
c5e438ec |
351 | bufchain_prefix(chain, &senddata, &sendlen); |
352 | ret = write(fd, senddata, sendlen); |
353 | if (ret > 0) |
354 | bufchain_consume(chain, ret); |
355 | else if (ret < 0) { |
356 | perror(is_stderr ? "stderr: write" : "stdout: write"); |
357 | exit(1); |
358 | } |
359 | } |
360 | |
9fab77dc |
361 | int from_backend(void *frontend_handle, int is_stderr, |
362 | const char *data, int len) |
c5e438ec |
363 | { |
364 | int osize, esize; |
365 | |
c5e438ec |
366 | if (is_stderr) { |
367 | bufchain_add(&stderr_data, data, len); |
368 | try_output(1); |
369 | } else { |
370 | bufchain_add(&stdout_data, data, len); |
371 | try_output(0); |
372 | } |
373 | |
374 | osize = bufchain_size(&stdout_data); |
375 | esize = bufchain_size(&stderr_data); |
376 | |
377 | return osize + esize; |
378 | } |
379 | |
5673d44e |
380 | int signalpipe[2]; |
381 | |
382 | void sigwinch(int signum) |
383 | { |
384 | write(signalpipe[1], "x", 1); |
385 | } |
386 | |
c5e438ec |
387 | /* |
74aca06d |
388 | * In Plink our selects are synchronous, so these functions are |
389 | * empty stubs. |
390 | */ |
391 | int uxsel_input_add(int fd, int rwx) { return 0; } |
392 | void uxsel_input_remove(int id) { } |
393 | |
394 | /* |
c5e438ec |
395 | * Short description of parameters. |
396 | */ |
397 | static void usage(void) |
398 | { |
399 | printf("PuTTY Link: command-line connection utility\n"); |
400 | printf("%s\n", ver); |
401 | printf("Usage: plink [options] [user@]host [command]\n"); |
402 | printf(" (\"host\" can also be a PuTTY saved session name)\n"); |
403 | printf("Options:\n"); |
2285d016 |
404 | printf(" -V print version information and exit\n"); |
405 | printf(" -pgpfp print PGP key fingerprints and exit\n"); |
c5e438ec |
406 | printf(" -v show verbose messages\n"); |
407 | printf(" -load sessname Load settings from saved session\n"); |
408 | printf(" -ssh -telnet -rlogin -raw\n"); |
afd4d0d2 |
409 | printf(" force use of a particular protocol\n"); |
c5e438ec |
410 | printf(" -P port connect to specified port\n"); |
411 | printf(" -l user connect with specified username\n"); |
c5e438ec |
412 | printf(" -batch disable all interactive prompts\n"); |
413 | printf("The following options only apply to SSH connections:\n"); |
414 | printf(" -pw passw login with specified password\n"); |
dbe6c525 |
415 | printf(" -D [listen-IP:]listen-port\n"); |
416 | printf(" Dynamic SOCKS-based port forwarding\n"); |
417 | printf(" -L [listen-IP:]listen-port:host:port\n"); |
418 | printf(" Forward local port to remote address\n"); |
419 | printf(" -R [listen-IP:]listen-port:host:port\n"); |
420 | printf(" Forward remote port to local address\n"); |
c5e438ec |
421 | printf(" -X -x enable / disable X11 forwarding\n"); |
422 | printf(" -A -a enable / disable agent forwarding\n"); |
423 | printf(" -t -T enable / disable pty allocation\n"); |
424 | printf(" -1 -2 force use of particular protocol version\n"); |
05581745 |
425 | printf(" -4 -6 force use of IPv4 or IPv6\n"); |
c5e438ec |
426 | printf(" -C enable compression\n"); |
427 | printf(" -i key private key file for authentication\n"); |
54018d95 |
428 | printf(" -m file read remote command(s) from file\n"); |
09bdfcbb |
429 | printf(" -s remote command is an SSH subsystem (SSH-2 only)\n"); |
b72c366d |
430 | printf(" -N don't start a shell/command (SSH-2 only)\n"); |
dc108ebc |
431 | exit(1); |
432 | } |
433 | |
434 | static void version(void) |
435 | { |
436 | printf("plink: %s\n", ver); |
c5e438ec |
437 | exit(1); |
438 | } |
439 | |
440 | int main(int argc, char **argv) |
441 | { |
442 | int sending; |
443 | int portnumber = -1; |
0ff9ea38 |
444 | int *fdlist; |
445 | int fd; |
446 | int i, fdcount, fdsize, fdstate; |
c5e438ec |
447 | int connopen; |
448 | int exitcode; |
86256dc6 |
449 | int errors; |
09bdfcbb |
450 | int use_subsystem = 0; |
b51259f6 |
451 | void *ldisc, *logctx; |
39934deb |
452 | long now; |
c5e438ec |
453 | |
454 | ssh_get_line = console_get_line; |
455 | |
0ff9ea38 |
456 | fdlist = NULL; |
457 | fdcount = fdsize = 0; |
c5e438ec |
458 | /* |
459 | * Initialise port and protocol to sensible defaults. (These |
460 | * will be overridden by more or less anything.) |
461 | */ |
462 | default_protocol = PROT_SSH; |
463 | default_port = 22; |
464 | |
465 | flags = FLAG_STDERR; |
466 | /* |
467 | * Process the command line. |
468 | */ |
469 | do_defaults(NULL, &cfg); |
18e62ad8 |
470 | loaded_session = FALSE; |
c5e438ec |
471 | default_protocol = cfg.protocol; |
472 | default_port = cfg.port; |
86256dc6 |
473 | errors = 0; |
c5e438ec |
474 | { |
475 | /* |
476 | * Override the default protocol if PLINK_PROTOCOL is set. |
477 | */ |
478 | char *p = getenv("PLINK_PROTOCOL"); |
479 | int i; |
480 | if (p) { |
481 | for (i = 0; backends[i].backend != NULL; i++) { |
482 | if (!strcmp(backends[i].name, p)) { |
483 | default_protocol = cfg.protocol = backends[i].protocol; |
484 | default_port = cfg.port = |
485 | backends[i].backend->default_port; |
486 | break; |
487 | } |
488 | } |
489 | } |
490 | } |
491 | while (--argc) { |
492 | char *p = *++argv; |
493 | if (*p == '-') { |
9b41d3a8 |
494 | int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL), |
495 | 1, &cfg); |
c5e438ec |
496 | if (ret == -2) { |
497 | fprintf(stderr, |
498 | "plink: option \"%s\" requires an argument\n", p); |
86256dc6 |
499 | errors = 1; |
c5e438ec |
500 | } else if (ret == 2) { |
501 | --argc, ++argv; |
502 | } else if (ret == 1) { |
503 | continue; |
504 | } else if (!strcmp(p, "-batch")) { |
505 | console_batch_mode = 1; |
09bdfcbb |
506 | } else if (!strcmp(p, "-s")) { |
507 | /* Save status to write to cfg later. */ |
508 | use_subsystem = 1; |
dc108ebc |
509 | } else if (!strcmp(p, "-V")) { |
510 | version(); |
2285d016 |
511 | } else if (!strcmp(p, "-pgpfp")) { |
512 | pgp_fingerprints(); |
513 | exit(1); |
a0e5ed33 |
514 | } else if (!strcmp(p, "-o")) { |
86256dc6 |
515 | if (argc <= 1) { |
a0e5ed33 |
516 | fprintf(stderr, |
517 | "plink: option \"-o\" requires an argument\n"); |
86256dc6 |
518 | errors = 1; |
519 | } else { |
520 | --argc; |
521 | provide_xrm_string(*++argv); |
522 | } |
523 | } else { |
524 | fprintf(stderr, "plink: unknown option \"%s\"\n", p); |
525 | errors = 1; |
c5e438ec |
526 | } |
527 | } else if (*p) { |
528 | if (!*cfg.host) { |
529 | char *q = p; |
a0e5ed33 |
530 | |
531 | do_defaults(NULL, &cfg); |
532 | |
c5e438ec |
533 | /* |
534 | * If the hostname starts with "telnet:", set the |
535 | * protocol to Telnet and process the string as a |
536 | * Telnet URL. |
537 | */ |
538 | if (!strncmp(q, "telnet:", 7)) { |
539 | char c; |
540 | |
541 | q += 7; |
542 | if (q[0] == '/' && q[1] == '/') |
543 | q += 2; |
544 | cfg.protocol = PROT_TELNET; |
545 | p = q; |
546 | while (*p && *p != ':' && *p != '/') |
547 | p++; |
548 | c = *p; |
549 | if (*p) |
550 | *p++ = '\0'; |
551 | if (c == ':') |
552 | cfg.port = atoi(p); |
553 | else |
554 | cfg.port = -1; |
555 | strncpy(cfg.host, q, sizeof(cfg.host) - 1); |
556 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
557 | } else { |
3608528b |
558 | char *r, *user, *host; |
c5e438ec |
559 | /* |
560 | * Before we process the [user@]host string, we |
561 | * first check for the presence of a protocol |
562 | * prefix (a protocol name followed by ","). |
563 | */ |
564 | r = strchr(p, ','); |
565 | if (r) { |
566 | int i, j; |
567 | for (i = 0; backends[i].backend != NULL; i++) { |
568 | j = strlen(backends[i].name); |
569 | if (j == r - p && |
570 | !memcmp(backends[i].name, p, j)) { |
571 | default_protocol = cfg.protocol = |
572 | backends[i].protocol; |
573 | portnumber = |
574 | backends[i].backend->default_port; |
575 | p = r + 1; |
576 | break; |
577 | } |
578 | } |
579 | } |
580 | |
581 | /* |
3608528b |
582 | * A nonzero length string followed by an @ is treated |
583 | * as a username. (We discount an _initial_ @.) The |
584 | * rest of the string (or the whole string if no @) |
585 | * is treated as a session name and/or hostname. |
c5e438ec |
586 | */ |
587 | r = strrchr(p, '@'); |
588 | if (r == p) |
589 | p++, r = NULL; /* discount initial @ */ |
3608528b |
590 | if (r) { |
591 | *r++ = '\0'; |
592 | user = p, host = r; |
593 | } else { |
594 | user = NULL, host = p; |
595 | } |
596 | |
597 | /* |
598 | * Now attempt to load a saved session with the |
599 | * same name as the hostname. |
600 | */ |
601 | { |
c5e438ec |
602 | Config cfg2; |
3608528b |
603 | do_defaults(host, &cfg2); |
18e62ad8 |
604 | if (loaded_session || cfg2.host[0] == '\0') { |
c5e438ec |
605 | /* No settings for this host; use defaults */ |
18e62ad8 |
606 | /* (or session was already loaded with -load) */ |
3608528b |
607 | strncpy(cfg.host, host, sizeof(cfg.host) - 1); |
c5e438ec |
608 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
609 | cfg.port = default_port; |
610 | } else { |
611 | cfg = cfg2; |
c5e438ec |
612 | } |
3608528b |
613 | } |
614 | |
615 | if (user) { |
616 | /* Patch in specified username. */ |
617 | strncpy(cfg.username, user, |
618 | sizeof(cfg.username) - 1); |
c5e438ec |
619 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
c5e438ec |
620 | } |
3608528b |
621 | |
c5e438ec |
622 | } |
623 | } else { |
624 | char *command; |
625 | int cmdlen, cmdsize; |
626 | cmdlen = cmdsize = 0; |
627 | command = NULL; |
628 | |
629 | while (argc) { |
630 | while (*p) { |
631 | if (cmdlen >= cmdsize) { |
632 | cmdsize = cmdlen + 512; |
3d88e64d |
633 | command = sresize(command, cmdsize, char); |
c5e438ec |
634 | } |
635 | command[cmdlen++]=*p++; |
636 | } |
637 | if (cmdlen >= cmdsize) { |
638 | cmdsize = cmdlen + 512; |
3d88e64d |
639 | command = sresize(command, cmdsize, char); |
c5e438ec |
640 | } |
641 | command[cmdlen++]=' '; /* always add trailing space */ |
642 | if (--argc) p = *++argv; |
643 | } |
644 | if (cmdlen) command[--cmdlen]='\0'; |
645 | /* change trailing blank to NUL */ |
646 | cfg.remote_cmd_ptr = command; |
647 | cfg.remote_cmd_ptr2 = NULL; |
648 | cfg.nopty = TRUE; /* command => no terminal */ |
649 | |
650 | break; /* done with cmdline */ |
651 | } |
652 | } |
653 | } |
654 | |
86256dc6 |
655 | if (errors) |
656 | return 1; |
657 | |
c5e438ec |
658 | if (!*cfg.host) { |
659 | usage(); |
660 | } |
661 | |
662 | /* |
663 | * Trim leading whitespace off the hostname if it's there. |
664 | */ |
665 | { |
666 | int space = strspn(cfg.host, " \t"); |
667 | memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space); |
668 | } |
669 | |
670 | /* See if host is of the form user@host */ |
671 | if (cfg.host[0] != '\0') { |
5dd103a8 |
672 | char *atsign = strrchr(cfg.host, '@'); |
c5e438ec |
673 | /* Make sure we're not overflowing the user field */ |
674 | if (atsign) { |
675 | if (atsign - cfg.host < sizeof cfg.username) { |
676 | strncpy(cfg.username, cfg.host, atsign - cfg.host); |
677 | cfg.username[atsign - cfg.host] = '\0'; |
678 | } |
679 | memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1)); |
680 | } |
681 | } |
682 | |
683 | /* |
684 | * Perform command-line overrides on session configuration. |
685 | */ |
9b41d3a8 |
686 | cmdline_run_saved(&cfg); |
c5e438ec |
687 | |
688 | /* |
09bdfcbb |
689 | * Apply subsystem status. |
690 | */ |
691 | if (use_subsystem) |
692 | cfg.ssh_subsys = TRUE; |
693 | |
694 | /* |
c5e438ec |
695 | * Trim a colon suffix off the hostname if it's there. |
696 | */ |
697 | cfg.host[strcspn(cfg.host, ":")] = '\0'; |
698 | |
699 | /* |
700 | * Remove any remaining whitespace from the hostname. |
701 | */ |
702 | { |
703 | int p1 = 0, p2 = 0; |
704 | while (cfg.host[p2] != '\0') { |
705 | if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') { |
706 | cfg.host[p1] = cfg.host[p2]; |
707 | p1++; |
708 | } |
709 | p2++; |
710 | } |
711 | cfg.host[p1] = '\0'; |
712 | } |
713 | |
a79e1969 |
714 | if (!cfg.remote_cmd_ptr && !*cfg.remote_cmd) |
c5e438ec |
715 | flags |= FLAG_INTERACTIVE; |
716 | |
717 | /* |
718 | * Select protocol. This is farmed out into a table in a |
719 | * separate file to enable an ssh-free variant. |
720 | */ |
721 | { |
722 | int i; |
723 | back = NULL; |
724 | for (i = 0; backends[i].backend != NULL; i++) |
725 | if (backends[i].protocol == cfg.protocol) { |
726 | back = backends[i].backend; |
727 | break; |
728 | } |
729 | if (back == NULL) { |
730 | fprintf(stderr, |
731 | "Internal fault: Unsupported protocol found\n"); |
732 | return 1; |
733 | } |
734 | } |
735 | |
736 | /* |
737 | * Select port. |
738 | */ |
739 | if (portnumber != -1) |
740 | cfg.port = portnumber; |
741 | |
5673d44e |
742 | /* |
743 | * Set up the pipe we'll use to tell us about SIGWINCH. |
744 | */ |
745 | if (pipe(signalpipe) < 0) { |
746 | perror("pipe"); |
747 | exit(1); |
748 | } |
749 | putty_signal(SIGWINCH, sigwinch); |
750 | |
c5e438ec |
751 | sk_init(); |
0ff9ea38 |
752 | uxsel_init(); |
c5e438ec |
753 | |
754 | /* |
755 | * Start up the connection. |
756 | */ |
c229ef97 |
757 | logctx = log_init(NULL, &cfg); |
b51259f6 |
758 | console_provide_logctx(logctx); |
c5e438ec |
759 | { |
cbe2d68f |
760 | const char *error; |
c5e438ec |
761 | char *realhost; |
762 | /* nodelay is only useful if stdin is a terminal device */ |
763 | int nodelay = cfg.tcp_nodelay && isatty(0); |
764 | |
86916870 |
765 | error = back->init(NULL, &backhandle, &cfg, cfg.host, cfg.port, |
79bf227b |
766 | &realhost, nodelay, cfg.tcp_keepalives); |
c5e438ec |
767 | if (error) { |
984992ef |
768 | fprintf(stderr, "Unable to open connection:\n%s\n", error); |
c5e438ec |
769 | return 1; |
770 | } |
c5e438ec |
771 | back->provide_logctx(backhandle, logctx); |
fe5634f6 |
772 | ldisc = ldisc_create(&cfg, NULL, back, backhandle, NULL); |
c5e438ec |
773 | sfree(realhost); |
774 | } |
775 | connopen = 1; |
776 | |
777 | /* |
778 | * Set up the initial console mode. We don't care if this call |
779 | * fails, because we know we aren't necessarily running in a |
780 | * console. |
781 | */ |
c6ccd5c2 |
782 | local_tty = (tcgetattr(0, &orig_termios) == 0); |
c5e438ec |
783 | atexit(cleanup_termios); |
784 | ldisc_update(NULL, 1, 1); |
785 | sending = FALSE; |
39934deb |
786 | now = GETTICKCOUNT(); |
c5e438ec |
787 | |
788 | while (1) { |
789 | fd_set rset, wset, xset; |
790 | int maxfd; |
791 | int rwx; |
792 | int ret; |
793 | |
794 | FD_ZERO(&rset); |
795 | FD_ZERO(&wset); |
796 | FD_ZERO(&xset); |
797 | maxfd = 0; |
798 | |
5673d44e |
799 | FD_SET_MAX(signalpipe[0], maxfd, rset); |
800 | |
c5e438ec |
801 | if (connopen && !sending && |
802 | back->socket(backhandle) != NULL && |
803 | back->sendok(backhandle) && |
804 | back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) { |
805 | /* If we're OK to send, then try to read from stdin. */ |
806 | FD_SET_MAX(0, maxfd, rset); |
807 | } |
808 | |
809 | if (bufchain_size(&stdout_data) > 0) { |
810 | /* If we have data for stdout, try to write to stdout. */ |
811 | FD_SET_MAX(1, maxfd, wset); |
812 | } |
813 | |
814 | if (bufchain_size(&stderr_data) > 0) { |
815 | /* If we have data for stderr, try to write to stderr. */ |
816 | FD_SET_MAX(2, maxfd, wset); |
817 | } |
818 | |
0ff9ea38 |
819 | /* Count the currently active fds. */ |
c5e438ec |
820 | i = 0; |
0ff9ea38 |
821 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
822 | fd = next_fd(&fdstate, &rwx)) i++; |
c5e438ec |
823 | |
0ff9ea38 |
824 | /* Expand the fdlist buffer if necessary. */ |
825 | if (i > fdsize) { |
826 | fdsize = i + 16; |
827 | fdlist = sresize(fdlist, fdsize, int); |
c5e438ec |
828 | } |
829 | |
830 | /* |
0ff9ea38 |
831 | * Add all currently open fds to the select sets, and store |
832 | * them in fdlist as well. |
c5e438ec |
833 | */ |
0ff9ea38 |
834 | fdcount = 0; |
835 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
836 | fd = next_fd(&fdstate, &rwx)) { |
837 | fdlist[fdcount++] = fd; |
c5e438ec |
838 | if (rwx & 1) |
0ff9ea38 |
839 | FD_SET_MAX(fd, maxfd, rset); |
c5e438ec |
840 | if (rwx & 2) |
0ff9ea38 |
841 | FD_SET_MAX(fd, maxfd, wset); |
c5e438ec |
842 | if (rwx & 4) |
0ff9ea38 |
843 | FD_SET_MAX(fd, maxfd, xset); |
c5e438ec |
844 | } |
845 | |
5673d44e |
846 | do { |
39934deb |
847 | long next, ticks; |
848 | struct timeval tv, *ptv; |
849 | |
850 | if (run_timers(now, &next)) { |
851 | ticks = next - GETTICKCOUNT(); |
852 | if (ticks < 0) ticks = 0; /* just in case */ |
853 | tv.tv_sec = ticks / 1000; |
854 | tv.tv_usec = ticks % 1000 * 1000; |
855 | ptv = &tv; |
856 | } else { |
857 | ptv = NULL; |
858 | } |
859 | ret = select(maxfd, &rset, &wset, &xset, ptv); |
860 | if (ret == 0) |
861 | now = next; |
2ac3322e |
862 | else { |
863 | long newnow = GETTICKCOUNT(); |
864 | /* |
865 | * Check to see whether the system clock has |
866 | * changed massively during the select. |
867 | */ |
868 | if (newnow - now < 0 || newnow - now > next - now) { |
869 | /* |
870 | * If so, look at the elapsed time in the |
871 | * select and use it to compute a new |
872 | * tickcount_offset. |
873 | */ |
874 | long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000; |
875 | /* So we'd like GETTICKCOUNT to have returned othernow, |
876 | * but instead it return newnow. Hence ... */ |
877 | tickcount_offset += othernow - newnow; |
878 | now = othernow; |
879 | } else { |
880 | now = newnow; |
881 | } |
882 | } |
5673d44e |
883 | } while (ret < 0 && errno == EINTR); |
c5e438ec |
884 | |
885 | if (ret < 0) { |
886 | perror("select"); |
887 | exit(1); |
888 | } |
889 | |
0ff9ea38 |
890 | for (i = 0; i < fdcount; i++) { |
891 | fd = fdlist[i]; |
56e5b2db |
892 | /* |
893 | * We must process exceptional notifications before |
894 | * ordinary readability ones, or we may go straight |
895 | * past the urgent marker. |
896 | */ |
0ff9ea38 |
897 | if (FD_ISSET(fd, &xset)) |
898 | select_result(fd, 4); |
899 | if (FD_ISSET(fd, &rset)) |
900 | select_result(fd, 1); |
901 | if (FD_ISSET(fd, &wset)) |
902 | select_result(fd, 2); |
c5e438ec |
903 | } |
904 | |
5673d44e |
905 | if (FD_ISSET(signalpipe[0], &rset)) { |
906 | char c[1]; |
907 | struct winsize size; |
908 | read(signalpipe[0], c, 1); /* ignore its value; it'll be `x' */ |
909 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
910 | back->size(backhandle, size.ws_col, size.ws_row); |
911 | } |
912 | |
c5e438ec |
913 | if (FD_ISSET(0, &rset)) { |
914 | char buf[4096]; |
915 | int ret; |
916 | |
917 | if (connopen && back->socket(backhandle) != NULL) { |
918 | ret = read(0, buf, sizeof(buf)); |
919 | if (ret < 0) { |
920 | perror("stdin: read"); |
921 | exit(1); |
922 | } else if (ret == 0) { |
923 | back->special(backhandle, TS_EOF); |
924 | sending = FALSE; /* send nothing further after this */ |
925 | } else { |
926 | back->send(backhandle, buf, ret); |
927 | } |
928 | } |
929 | } |
930 | |
931 | if (FD_ISSET(1, &wset)) { |
932 | try_output(0); |
933 | } |
934 | |
935 | if (FD_ISSET(2, &wset)) { |
936 | try_output(1); |
937 | } |
938 | |
939 | if ((!connopen || back->socket(backhandle) == NULL) && |
940 | bufchain_size(&stdout_data) == 0 && |
941 | bufchain_size(&stderr_data) == 0) |
942 | break; /* we closed the connection */ |
943 | } |
944 | exitcode = back->exitcode(backhandle); |
945 | if (exitcode < 0) { |
946 | fprintf(stderr, "Remote process exit code unavailable\n"); |
947 | exitcode = 1; /* this is an error condition */ |
948 | } |
d9c40fd6 |
949 | cleanup_exit(exitcode); |
950 | return exitcode; /* shouldn't happen, but placates gcc */ |
c5e438ec |
951 | } |