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> |
154c73d5 |
16 | #include <sys/time.h> |
17 | #ifndef HAVE_NO_SYS_SELECT_H |
2a6848cc |
18 | #include <sys/select.h> |
154c73d5 |
19 | #endif |
c5e438ec |
20 | |
c5e438ec |
21 | #define PUTTY_DO_GLOBALS /* actually _define_ globals */ |
22 | #include "putty.h" |
23 | #include "storage.h" |
24 | #include "tree234.h" |
25 | |
26 | #define MAX_STDIN_BACKLOG 4096 |
27 | |
28 | void fatalbox(char *p, ...) |
29 | { |
30 | va_list ap; |
31 | fprintf(stderr, "FATAL ERROR: "); |
32 | va_start(ap, p); |
33 | vfprintf(stderr, p, ap); |
34 | va_end(ap); |
35 | fputc('\n', stderr); |
36 | cleanup_exit(1); |
37 | } |
38 | void modalfatalbox(char *p, ...) |
39 | { |
40 | va_list ap; |
41 | fprintf(stderr, "FATAL ERROR: "); |
42 | va_start(ap, p); |
43 | vfprintf(stderr, p, ap); |
44 | va_end(ap); |
45 | fputc('\n', stderr); |
46 | cleanup_exit(1); |
47 | } |
48 | void connection_fatal(void *frontend, char *p, ...) |
49 | { |
50 | va_list ap; |
51 | fprintf(stderr, "FATAL ERROR: "); |
52 | va_start(ap, p); |
53 | vfprintf(stderr, p, ap); |
54 | va_end(ap); |
55 | fputc('\n', stderr); |
56 | cleanup_exit(1); |
57 | } |
58 | void cmdline_error(char *p, ...) |
59 | { |
60 | va_list ap; |
61 | fprintf(stderr, "plink: "); |
62 | va_start(ap, p); |
63 | vfprintf(stderr, p, ap); |
64 | va_end(ap); |
65 | fputc('\n', stderr); |
66 | exit(1); |
67 | } |
68 | |
c6ccd5c2 |
69 | static int local_tty = 0; /* do we have a local tty? */ |
70 | static struct termios orig_termios; |
c5e438ec |
71 | |
72 | static Backend *back; |
73 | static void *backhandle; |
3ea863a3 |
74 | static Config cfg; |
c5e438ec |
75 | |
5a9eb105 |
76 | /* |
77 | * Default settings that are specific to pterm. |
78 | */ |
c85623f9 |
79 | char *platform_default_s(const char *name) |
5a9eb105 |
80 | { |
5a9eb105 |
81 | if (!strcmp(name, "TermType")) |
799dfcfa |
82 | return dupstr(getenv("TERM")); |
83 | if (!strcmp(name, "UserName")) |
84 | return get_username(); |
5a9eb105 |
85 | return NULL; |
86 | } |
87 | |
c85623f9 |
88 | int platform_default_i(const char *name, int def) |
5a9eb105 |
89 | { |
90 | if (!strcmp(name, "TermWidth") || |
91 | !strcmp(name, "TermHeight")) { |
92 | struct winsize size; |
93 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
94 | return (!strcmp(name, "TermWidth") ? size.ws_col : size.ws_row); |
95 | } |
96 | return def; |
97 | } |
98 | |
9a30e26b |
99 | FontSpec platform_default_fontspec(const char *name) |
100 | { |
101 | FontSpec ret; |
102 | *ret.name = '\0'; |
103 | return ret; |
104 | } |
105 | |
106 | Filename platform_default_filename(const char *name) |
107 | { |
108 | Filename ret; |
109 | if (!strcmp(name, "LogFileName")) |
110 | strcpy(ret.path, "putty.log"); |
111 | else |
112 | *ret.path = '\0'; |
113 | return ret; |
114 | } |
115 | |
c85623f9 |
116 | char *x_get_default(const char *key) |
c5e438ec |
117 | { |
118 | return NULL; /* this is a stub */ |
119 | } |
120 | int term_ldisc(Terminal *term, int mode) |
121 | { |
122 | return FALSE; |
123 | } |
124 | void ldisc_update(void *frontend, int echo, int edit) |
125 | { |
126 | /* Update stdin read mode to reflect changes in line discipline. */ |
127 | struct termios mode; |
128 | |
c6ccd5c2 |
129 | if (!local_tty) return; |
130 | |
c5e438ec |
131 | mode = orig_termios; |
132 | |
133 | if (echo) |
134 | mode.c_lflag |= ECHO; |
135 | else |
136 | mode.c_lflag &= ~ECHO; |
137 | |
8cdf0e5f |
138 | if (edit) { |
139 | mode.c_iflag |= ICRNL; |
c5e438ec |
140 | mode.c_lflag |= ISIG | ICANON; |
e8269d30 |
141 | mode.c_oflag |= OPOST; |
8cdf0e5f |
142 | } else { |
143 | mode.c_iflag &= ~ICRNL; |
c5e438ec |
144 | mode.c_lflag &= ~(ISIG | ICANON); |
e8269d30 |
145 | mode.c_oflag &= ~OPOST; |
c6ccd5c2 |
146 | /* Solaris sets these to unhelpful values */ |
259d0428 |
147 | mode.c_cc[VMIN] = 1; |
148 | mode.c_cc[VTIME] = 0; |
c6ccd5c2 |
149 | /* FIXME: perhaps what we do with IXON/IXOFF should be an |
150 | * argument to ldisc_update(), to allow implementation of SSH-2 |
151 | * "xon-xoff" and Rlogin's equivalent? */ |
152 | mode.c_iflag &= ~IXON; |
153 | mode.c_iflag &= ~IXOFF; |
8cdf0e5f |
154 | } |
d0cb8c0c |
155 | /* |
156 | * Mark parity errors and (more important) BREAK on input. This |
157 | * is more complex than it need be because POSIX-2001 suggests |
158 | * that escaping of valid 0xff in the input stream is dependent on |
159 | * IGNPAR being clear even though marking of BREAK isn't. NetBSD |
160 | * 2.0 goes one worse and makes it dependent on INPCK too. We |
161 | * deal with this by forcing these flags into a useful state and |
162 | * then faking the state in which we found them in from_tty() if |
163 | * we get passed a parity or framing error. |
164 | */ |
165 | mode.c_iflag = (mode.c_iflag | INPCK | PARMRK) & ~IGNPAR; |
c5e438ec |
166 | |
167 | tcsetattr(0, TCSANOW, &mode); |
168 | } |
169 | |
c6ccd5c2 |
170 | /* Helper function to extract a special character from a termios. */ |
171 | static char *get_ttychar(struct termios *t, int index) |
172 | { |
173 | cc_t c = t->c_cc[index]; |
174 | #if defined(_POSIX_VDISABLE) |
175 | if (c == _POSIX_VDISABLE) |
176 | return dupprintf(""); |
177 | #endif |
178 | return dupprintf("^<%d>", c); |
179 | } |
180 | |
181 | char *get_ttymode(void *frontend, const char *mode) |
182 | { |
183 | /* |
184 | * Propagate appropriate terminal modes from the local terminal, |
185 | * if any. |
186 | */ |
187 | if (!local_tty) return NULL; |
188 | |
189 | #define GET_CHAR(ourname, uxname) \ |
190 | do { \ |
191 | if (strcmp(mode, ourname) == 0) \ |
192 | return get_ttychar(&orig_termios, uxname); \ |
193 | } while(0) |
194 | #define GET_BOOL(ourname, uxname, uxmemb, transform) \ |
195 | do { \ |
196 | if (strcmp(mode, ourname) == 0) { \ |
197 | int b = (orig_termios.uxmemb & uxname) != 0; \ |
198 | transform; \ |
199 | return dupprintf("%d", b); \ |
200 | } \ |
201 | } while (0) |
202 | |
203 | /* |
204 | * Modes that want to be the same on all terminal devices involved. |
205 | */ |
206 | /* All the special characters supported by SSH */ |
207 | #if defined(VINTR) |
208 | GET_CHAR("INTR", VINTR); |
209 | #endif |
210 | #if defined(VQUIT) |
211 | GET_CHAR("QUIT", VQUIT); |
212 | #endif |
213 | #if defined(VERASE) |
214 | GET_CHAR("ERASE", VERASE); |
215 | #endif |
216 | #if defined(VKILL) |
217 | GET_CHAR("KILL", VKILL); |
218 | #endif |
219 | #if defined(VEOF) |
220 | GET_CHAR("EOF", VEOF); |
221 | #endif |
222 | #if defined(VEOL) |
223 | GET_CHAR("EOL", VEOL); |
224 | #endif |
225 | #if defined(VEOL2) |
226 | GET_CHAR("EOL2", VEOL2); |
227 | #endif |
228 | #if defined(VSTART) |
229 | GET_CHAR("START", VSTART); |
230 | #endif |
231 | #if defined(VSTOP) |
232 | GET_CHAR("STOP", VSTOP); |
233 | #endif |
234 | #if defined(VSUSP) |
235 | GET_CHAR("SUSP", VSUSP); |
236 | #endif |
237 | #if defined(VDSUSP) |
238 | GET_CHAR("DSUSP", VDSUSP); |
239 | #endif |
240 | #if defined(VREPRINT) |
241 | GET_CHAR("REPRINT", VREPRINT); |
242 | #endif |
243 | #if defined(VWERASE) |
244 | GET_CHAR("WERASE", VWERASE); |
245 | #endif |
246 | #if defined(VLNEXT) |
247 | GET_CHAR("LNEXT", VLNEXT); |
248 | #endif |
249 | #if defined(VFLUSH) |
250 | GET_CHAR("FLUSH", VFLUSH); |
251 | #endif |
252 | #if defined(VSWTCH) |
253 | GET_CHAR("SWTCH", VSWTCH); |
254 | #endif |
255 | #if defined(VSTATUS) |
256 | GET_CHAR("STATUS", VSTATUS); |
257 | #endif |
258 | #if defined(VDISCARD) |
259 | GET_CHAR("DISCARD", VDISCARD); |
260 | #endif |
261 | /* Modes that "configure" other major modes. These should probably be |
262 | * considered as user preferences. */ |
263 | /* Configuration of ICANON */ |
264 | #if defined(ECHOK) |
265 | GET_BOOL("ECHOK", ECHOK, c_lflag, ); |
266 | #endif |
267 | #if defined(ECHOKE) |
268 | GET_BOOL("ECHOKE", ECHOKE, c_lflag, ); |
269 | #endif |
270 | #if defined(ECHOE) |
271 | GET_BOOL("ECHOE", ECHOE, c_lflag, ); |
272 | #endif |
273 | #if defined(ECHONL) |
274 | GET_BOOL("ECHONL", ECHONL, c_lflag, ); |
275 | #endif |
276 | #if defined(XCASE) |
277 | GET_BOOL("XCASE", XCASE, c_lflag, ); |
278 | #endif |
279 | /* Configuration of ECHO */ |
280 | #if defined(ECHOCTL) |
281 | GET_BOOL("ECHOCTL", ECHOCTL, c_lflag, ); |
282 | #endif |
283 | /* Configuration of IXON/IXOFF */ |
284 | #if defined(IXANY) |
285 | GET_BOOL("IXANY", IXANY, c_iflag, ); |
286 | #endif |
e8269d30 |
287 | /* Configuration of OPOST */ |
7016cde4 |
288 | #if defined(OLCUC) |
289 | GET_BOOL("OLCUC", OLCUC, c_oflag, ); |
290 | #endif |
e8269d30 |
291 | #if defined(ONLCR) |
292 | GET_BOOL("ONLCR", ONLCR, c_oflag, ); |
293 | #endif |
294 | #if defined(OCRNL) |
295 | GET_BOOL("OCRNL", OCRNL, c_oflag, ); |
296 | #endif |
297 | #if defined(ONOCR) |
298 | GET_BOOL("ONOCR", ONOCR, c_oflag, ); |
299 | #endif |
20923089 |
300 | #if defined(ONLRET) |
e8269d30 |
301 | GET_BOOL("ONLRET", ONLRET, c_oflag, ); |
302 | #endif |
c6ccd5c2 |
303 | |
304 | /* |
305 | * Modes that want to be set in only one place, and that we have |
306 | * squashed locally. |
307 | */ |
308 | #if defined(ISIG) |
309 | GET_BOOL("ISIG", ISIG, c_lflag, ); |
310 | #endif |
311 | #if defined(ICANON) |
312 | GET_BOOL("ICANON", ICANON, c_lflag, ); |
313 | #endif |
314 | #if defined(ECHO) |
315 | GET_BOOL("ECHO", ECHO, c_lflag, ); |
316 | #endif |
317 | #if defined(IXON) |
318 | GET_BOOL("IXON", IXON, c_iflag, ); |
319 | #endif |
320 | #if defined(IXOFF) |
321 | GET_BOOL("IXOFF", IXOFF, c_iflag, ); |
322 | #endif |
e8269d30 |
323 | #if defined(OPOST) |
324 | GET_BOOL("OPOST", OPOST, c_oflag, ); |
325 | #endif |
c6ccd5c2 |
326 | |
327 | /* |
328 | * We do not propagate the following modes: |
329 | * - Parity/serial settings, which are a local affair and don't |
330 | * make sense propagated over SSH's 8-bit byte-stream. |
331 | * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD |
332 | * - Things that want to be enabled in one place that we don't |
333 | * squash locally. |
7016cde4 |
334 | * IUCLC |
c6ccd5c2 |
335 | * - Status bits. |
336 | * PENDIN |
337 | * - Things I don't know what to do with. (FIXME) |
e8269d30 |
338 | * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN |
339 | * INLCR IGNCR ICRNL |
c6ccd5c2 |
340 | */ |
341 | |
342 | #undef GET_CHAR |
343 | #undef GET_BOOL |
344 | |
345 | /* Fall through to here for unrecognised names, or ones that are |
346 | * unsupported on this platform */ |
347 | return NULL; |
348 | } |
349 | |
c5e438ec |
350 | void cleanup_termios(void) |
351 | { |
c6ccd5c2 |
352 | if (local_tty) |
353 | tcsetattr(0, TCSANOW, &orig_termios); |
c5e438ec |
354 | } |
355 | |
356 | bufchain stdout_data, stderr_data; |
357 | |
358 | void try_output(int is_stderr) |
359 | { |
360 | bufchain *chain = (is_stderr ? &stderr_data : &stdout_data); |
361 | int fd = (is_stderr ? 2 : 1); |
362 | void *senddata; |
363 | int sendlen, ret; |
364 | |
d69a46c0 |
365 | if (bufchain_size(chain) == 0) |
366 | return; |
367 | |
c5e438ec |
368 | bufchain_prefix(chain, &senddata, &sendlen); |
369 | ret = write(fd, senddata, sendlen); |
370 | if (ret > 0) |
371 | bufchain_consume(chain, ret); |
372 | else if (ret < 0) { |
373 | perror(is_stderr ? "stderr: write" : "stdout: write"); |
374 | exit(1); |
375 | } |
376 | } |
377 | |
9fab77dc |
378 | int from_backend(void *frontend_handle, int is_stderr, |
379 | const char *data, int len) |
c5e438ec |
380 | { |
381 | int osize, esize; |
382 | |
c5e438ec |
383 | if (is_stderr) { |
384 | bufchain_add(&stderr_data, data, len); |
385 | try_output(1); |
386 | } else { |
387 | bufchain_add(&stdout_data, data, len); |
388 | try_output(0); |
389 | } |
390 | |
391 | osize = bufchain_size(&stdout_data); |
392 | esize = bufchain_size(&stderr_data); |
393 | |
394 | return osize + esize; |
395 | } |
396 | |
edd0cb8a |
397 | int from_backend_untrusted(void *frontend_handle, const char *data, int len) |
398 | { |
399 | /* |
400 | * No "untrusted" output should get here (the way the code is |
401 | * currently, it's all diverted by FLAG_STDERR). |
402 | */ |
403 | assert(!"Unexpected call to from_backend_untrusted()"); |
404 | return 0; /* not reached */ |
405 | } |
406 | |
407 | int get_userpass_input(prompts_t *p, unsigned char *in, int inlen) |
408 | { |
409 | int ret; |
410 | ret = cmdline_get_passwd_input(p, in, inlen); |
411 | if (ret == -1) |
412 | ret = console_get_userpass_input(p, in, inlen); |
413 | return ret; |
414 | } |
415 | |
d0cb8c0c |
416 | /* |
417 | * Handle data from a local tty in PARMRK format. |
418 | */ |
419 | static void from_tty(void *buf, unsigned len) |
420 | { |
421 | char *p, *q, *end; |
422 | static enum {NORMAL, FF, FF00} state = NORMAL; |
423 | |
424 | p = buf; end = buf + len; |
425 | while (p < end) { |
426 | switch (state) { |
427 | case NORMAL: |
428 | if (*p == '\xff') { |
429 | p++; |
430 | state = FF; |
431 | } else { |
432 | q = memchr(p, '\xff', end - p); |
433 | if (q == NULL) q = end; |
434 | back->send(backhandle, p, q - p); |
435 | p = q; |
436 | } |
437 | break; |
438 | case FF: |
439 | if (*p == '\xff') { |
440 | back->send(backhandle, p, 1); |
441 | p++; |
442 | state = NORMAL; |
443 | } else if (*p == '\0') { |
444 | p++; |
445 | state = FF00; |
446 | } else abort(); |
447 | break; |
448 | case FF00: |
449 | if (*p == '\0') { |
450 | back->special(backhandle, TS_BRK); |
451 | } else { |
452 | /* |
453 | * Pretend that PARMRK wasn't set. This involves |
454 | * faking what INPCK and IGNPAR would have done if |
455 | * we hadn't overridden them. Unfortunately, we |
456 | * can't do this entirely correctly because INPCK |
457 | * distinguishes between framing and parity |
458 | * errors, but PARMRK format represents both in |
459 | * the same way. We assume that parity errors are |
460 | * more common than framing errors, and hence |
461 | * treat all input errors as being subject to |
462 | * INPCK. |
463 | */ |
464 | if (orig_termios.c_iflag & INPCK) { |
465 | /* If IGNPAR is set, we throw away the character. */ |
466 | if (!(orig_termios.c_iflag & IGNPAR)) { |
467 | /* PE/FE get passed on as NUL. */ |
468 | *p = 0; |
469 | back->send(backhandle, p, 1); |
470 | } |
471 | } else { |
472 | /* INPCK not set. Assume we got a parity error. */ |
473 | back->send(backhandle, p, 1); |
474 | } |
475 | } |
476 | p++; |
477 | state = NORMAL; |
478 | } |
479 | } |
480 | } |
481 | |
5673d44e |
482 | int signalpipe[2]; |
483 | |
484 | void sigwinch(int signum) |
485 | { |
486 | write(signalpipe[1], "x", 1); |
487 | } |
488 | |
c5e438ec |
489 | /* |
74aca06d |
490 | * In Plink our selects are synchronous, so these functions are |
491 | * empty stubs. |
492 | */ |
493 | int uxsel_input_add(int fd, int rwx) { return 0; } |
494 | void uxsel_input_remove(int id) { } |
495 | |
496 | /* |
c5e438ec |
497 | * Short description of parameters. |
498 | */ |
499 | static void usage(void) |
500 | { |
501 | printf("PuTTY Link: command-line connection utility\n"); |
502 | printf("%s\n", ver); |
503 | printf("Usage: plink [options] [user@]host [command]\n"); |
504 | printf(" (\"host\" can also be a PuTTY saved session name)\n"); |
505 | printf("Options:\n"); |
2285d016 |
506 | printf(" -V print version information and exit\n"); |
507 | printf(" -pgpfp print PGP key fingerprints and exit\n"); |
c5e438ec |
508 | printf(" -v show verbose messages\n"); |
509 | printf(" -load sessname Load settings from saved session\n"); |
510 | printf(" -ssh -telnet -rlogin -raw\n"); |
afd4d0d2 |
511 | printf(" force use of a particular protocol\n"); |
c5e438ec |
512 | printf(" -P port connect to specified port\n"); |
513 | printf(" -l user connect with specified username\n"); |
c5e438ec |
514 | printf(" -batch disable all interactive prompts\n"); |
515 | printf("The following options only apply to SSH connections:\n"); |
516 | printf(" -pw passw login with specified password\n"); |
dbe6c525 |
517 | printf(" -D [listen-IP:]listen-port\n"); |
518 | printf(" Dynamic SOCKS-based port forwarding\n"); |
519 | printf(" -L [listen-IP:]listen-port:host:port\n"); |
520 | printf(" Forward local port to remote address\n"); |
521 | printf(" -R [listen-IP:]listen-port:host:port\n"); |
522 | printf(" Forward remote port to local address\n"); |
c5e438ec |
523 | printf(" -X -x enable / disable X11 forwarding\n"); |
524 | printf(" -A -a enable / disable agent forwarding\n"); |
525 | printf(" -t -T enable / disable pty allocation\n"); |
526 | printf(" -1 -2 force use of particular protocol version\n"); |
05581745 |
527 | printf(" -4 -6 force use of IPv4 or IPv6\n"); |
c5e438ec |
528 | printf(" -C enable compression\n"); |
529 | printf(" -i key private key file for authentication\n"); |
e5708bc7 |
530 | printf(" -noagent disable use of Pageant\n"); |
531 | printf(" -agent enable use of Pageant\n"); |
54018d95 |
532 | printf(" -m file read remote command(s) from file\n"); |
09bdfcbb |
533 | printf(" -s remote command is an SSH subsystem (SSH-2 only)\n"); |
b72c366d |
534 | printf(" -N don't start a shell/command (SSH-2 only)\n"); |
dc108ebc |
535 | exit(1); |
536 | } |
537 | |
538 | static void version(void) |
539 | { |
540 | printf("plink: %s\n", ver); |
c5e438ec |
541 | exit(1); |
542 | } |
543 | |
544 | int main(int argc, char **argv) |
545 | { |
546 | int sending; |
547 | int portnumber = -1; |
0ff9ea38 |
548 | int *fdlist; |
549 | int fd; |
550 | int i, fdcount, fdsize, fdstate; |
c5e438ec |
551 | int connopen; |
552 | int exitcode; |
86256dc6 |
553 | int errors; |
09bdfcbb |
554 | int use_subsystem = 0; |
b51259f6 |
555 | void *ldisc, *logctx; |
39934deb |
556 | long now; |
c5e438ec |
557 | |
0ff9ea38 |
558 | fdlist = NULL; |
559 | fdcount = fdsize = 0; |
c5e438ec |
560 | /* |
561 | * Initialise port and protocol to sensible defaults. (These |
562 | * will be overridden by more or less anything.) |
563 | */ |
564 | default_protocol = PROT_SSH; |
565 | default_port = 22; |
566 | |
567 | flags = FLAG_STDERR; |
568 | /* |
569 | * Process the command line. |
570 | */ |
571 | do_defaults(NULL, &cfg); |
18e62ad8 |
572 | loaded_session = FALSE; |
c5e438ec |
573 | default_protocol = cfg.protocol; |
574 | default_port = cfg.port; |
86256dc6 |
575 | errors = 0; |
c5e438ec |
576 | { |
577 | /* |
578 | * Override the default protocol if PLINK_PROTOCOL is set. |
579 | */ |
580 | char *p = getenv("PLINK_PROTOCOL"); |
581 | int i; |
582 | if (p) { |
583 | for (i = 0; backends[i].backend != NULL; i++) { |
584 | if (!strcmp(backends[i].name, p)) { |
585 | default_protocol = cfg.protocol = backends[i].protocol; |
586 | default_port = cfg.port = |
587 | backends[i].backend->default_port; |
588 | break; |
589 | } |
590 | } |
591 | } |
592 | } |
593 | while (--argc) { |
594 | char *p = *++argv; |
595 | if (*p == '-') { |
9b41d3a8 |
596 | int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL), |
597 | 1, &cfg); |
c5e438ec |
598 | if (ret == -2) { |
599 | fprintf(stderr, |
600 | "plink: option \"%s\" requires an argument\n", p); |
86256dc6 |
601 | errors = 1; |
c5e438ec |
602 | } else if (ret == 2) { |
603 | --argc, ++argv; |
604 | } else if (ret == 1) { |
605 | continue; |
606 | } else if (!strcmp(p, "-batch")) { |
607 | console_batch_mode = 1; |
09bdfcbb |
608 | } else if (!strcmp(p, "-s")) { |
609 | /* Save status to write to cfg later. */ |
610 | use_subsystem = 1; |
dc108ebc |
611 | } else if (!strcmp(p, "-V")) { |
612 | version(); |
2285d016 |
613 | } else if (!strcmp(p, "-pgpfp")) { |
614 | pgp_fingerprints(); |
615 | exit(1); |
a0e5ed33 |
616 | } else if (!strcmp(p, "-o")) { |
86256dc6 |
617 | if (argc <= 1) { |
a0e5ed33 |
618 | fprintf(stderr, |
619 | "plink: option \"-o\" requires an argument\n"); |
86256dc6 |
620 | errors = 1; |
621 | } else { |
622 | --argc; |
623 | provide_xrm_string(*++argv); |
624 | } |
625 | } else { |
626 | fprintf(stderr, "plink: unknown option \"%s\"\n", p); |
627 | errors = 1; |
c5e438ec |
628 | } |
629 | } else if (*p) { |
630 | if (!*cfg.host) { |
631 | char *q = p; |
a0e5ed33 |
632 | |
c5e438ec |
633 | /* |
634 | * If the hostname starts with "telnet:", set the |
635 | * protocol to Telnet and process the string as a |
636 | * Telnet URL. |
637 | */ |
638 | if (!strncmp(q, "telnet:", 7)) { |
639 | char c; |
640 | |
641 | q += 7; |
642 | if (q[0] == '/' && q[1] == '/') |
643 | q += 2; |
644 | cfg.protocol = PROT_TELNET; |
645 | p = q; |
646 | while (*p && *p != ':' && *p != '/') |
647 | p++; |
648 | c = *p; |
649 | if (*p) |
650 | *p++ = '\0'; |
651 | if (c == ':') |
652 | cfg.port = atoi(p); |
653 | else |
654 | cfg.port = -1; |
655 | strncpy(cfg.host, q, sizeof(cfg.host) - 1); |
656 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
657 | } else { |
3608528b |
658 | char *r, *user, *host; |
c5e438ec |
659 | /* |
660 | * Before we process the [user@]host string, we |
661 | * first check for the presence of a protocol |
662 | * prefix (a protocol name followed by ","). |
663 | */ |
664 | r = strchr(p, ','); |
665 | if (r) { |
666 | int i, j; |
667 | for (i = 0; backends[i].backend != NULL; i++) { |
668 | j = strlen(backends[i].name); |
669 | if (j == r - p && |
670 | !memcmp(backends[i].name, p, j)) { |
671 | default_protocol = cfg.protocol = |
672 | backends[i].protocol; |
673 | portnumber = |
674 | backends[i].backend->default_port; |
675 | p = r + 1; |
676 | break; |
677 | } |
678 | } |
679 | } |
680 | |
681 | /* |
3608528b |
682 | * A nonzero length string followed by an @ is treated |
683 | * as a username. (We discount an _initial_ @.) The |
684 | * rest of the string (or the whole string if no @) |
685 | * is treated as a session name and/or hostname. |
c5e438ec |
686 | */ |
687 | r = strrchr(p, '@'); |
688 | if (r == p) |
689 | p++, r = NULL; /* discount initial @ */ |
3608528b |
690 | if (r) { |
691 | *r++ = '\0'; |
692 | user = p, host = r; |
693 | } else { |
694 | user = NULL, host = p; |
695 | } |
696 | |
697 | /* |
698 | * Now attempt to load a saved session with the |
699 | * same name as the hostname. |
700 | */ |
701 | { |
c5e438ec |
702 | Config cfg2; |
3608528b |
703 | do_defaults(host, &cfg2); |
18e62ad8 |
704 | if (loaded_session || cfg2.host[0] == '\0') { |
c5e438ec |
705 | /* No settings for this host; use defaults */ |
18e62ad8 |
706 | /* (or session was already loaded with -load) */ |
3608528b |
707 | strncpy(cfg.host, host, sizeof(cfg.host) - 1); |
c5e438ec |
708 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
709 | cfg.port = default_port; |
710 | } else { |
711 | cfg = cfg2; |
c5e438ec |
712 | } |
3608528b |
713 | } |
714 | |
715 | if (user) { |
716 | /* Patch in specified username. */ |
717 | strncpy(cfg.username, user, |
718 | sizeof(cfg.username) - 1); |
c5e438ec |
719 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
c5e438ec |
720 | } |
3608528b |
721 | |
c5e438ec |
722 | } |
723 | } else { |
724 | char *command; |
725 | int cmdlen, cmdsize; |
726 | cmdlen = cmdsize = 0; |
727 | command = NULL; |
728 | |
729 | while (argc) { |
730 | while (*p) { |
731 | if (cmdlen >= cmdsize) { |
732 | cmdsize = cmdlen + 512; |
3d88e64d |
733 | command = sresize(command, cmdsize, char); |
c5e438ec |
734 | } |
735 | command[cmdlen++]=*p++; |
736 | } |
737 | if (cmdlen >= cmdsize) { |
738 | cmdsize = cmdlen + 512; |
3d88e64d |
739 | command = sresize(command, cmdsize, char); |
c5e438ec |
740 | } |
741 | command[cmdlen++]=' '; /* always add trailing space */ |
742 | if (--argc) p = *++argv; |
743 | } |
744 | if (cmdlen) command[--cmdlen]='\0'; |
745 | /* change trailing blank to NUL */ |
746 | cfg.remote_cmd_ptr = command; |
747 | cfg.remote_cmd_ptr2 = NULL; |
748 | cfg.nopty = TRUE; /* command => no terminal */ |
749 | |
750 | break; /* done with cmdline */ |
751 | } |
752 | } |
753 | } |
754 | |
86256dc6 |
755 | if (errors) |
756 | return 1; |
757 | |
c5e438ec |
758 | if (!*cfg.host) { |
759 | usage(); |
760 | } |
761 | |
762 | /* |
763 | * Trim leading whitespace off the hostname if it's there. |
764 | */ |
765 | { |
766 | int space = strspn(cfg.host, " \t"); |
767 | memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space); |
768 | } |
769 | |
770 | /* See if host is of the form user@host */ |
771 | if (cfg.host[0] != '\0') { |
5dd103a8 |
772 | char *atsign = strrchr(cfg.host, '@'); |
c5e438ec |
773 | /* Make sure we're not overflowing the user field */ |
774 | if (atsign) { |
775 | if (atsign - cfg.host < sizeof cfg.username) { |
776 | strncpy(cfg.username, cfg.host, atsign - cfg.host); |
777 | cfg.username[atsign - cfg.host] = '\0'; |
778 | } |
779 | memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1)); |
780 | } |
781 | } |
782 | |
783 | /* |
784 | * Perform command-line overrides on session configuration. |
785 | */ |
9b41d3a8 |
786 | cmdline_run_saved(&cfg); |
c5e438ec |
787 | |
788 | /* |
09bdfcbb |
789 | * Apply subsystem status. |
790 | */ |
791 | if (use_subsystem) |
792 | cfg.ssh_subsys = TRUE; |
793 | |
794 | /* |
c5e438ec |
795 | * Trim a colon suffix off the hostname if it's there. |
796 | */ |
797 | cfg.host[strcspn(cfg.host, ":")] = '\0'; |
798 | |
799 | /* |
800 | * Remove any remaining whitespace from the hostname. |
801 | */ |
802 | { |
803 | int p1 = 0, p2 = 0; |
804 | while (cfg.host[p2] != '\0') { |
805 | if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') { |
806 | cfg.host[p1] = cfg.host[p2]; |
807 | p1++; |
808 | } |
809 | p2++; |
810 | } |
811 | cfg.host[p1] = '\0'; |
812 | } |
813 | |
a79e1969 |
814 | if (!cfg.remote_cmd_ptr && !*cfg.remote_cmd) |
c5e438ec |
815 | flags |= FLAG_INTERACTIVE; |
816 | |
817 | /* |
818 | * Select protocol. This is farmed out into a table in a |
819 | * separate file to enable an ssh-free variant. |
820 | */ |
821 | { |
822 | int i; |
823 | back = NULL; |
824 | for (i = 0; backends[i].backend != NULL; i++) |
825 | if (backends[i].protocol == cfg.protocol) { |
826 | back = backends[i].backend; |
827 | break; |
828 | } |
829 | if (back == NULL) { |
830 | fprintf(stderr, |
831 | "Internal fault: Unsupported protocol found\n"); |
832 | return 1; |
833 | } |
834 | } |
835 | |
836 | /* |
837 | * Select port. |
838 | */ |
839 | if (portnumber != -1) |
840 | cfg.port = portnumber; |
841 | |
5673d44e |
842 | /* |
843 | * Set up the pipe we'll use to tell us about SIGWINCH. |
844 | */ |
845 | if (pipe(signalpipe) < 0) { |
846 | perror("pipe"); |
847 | exit(1); |
848 | } |
849 | putty_signal(SIGWINCH, sigwinch); |
850 | |
c5e438ec |
851 | sk_init(); |
0ff9ea38 |
852 | uxsel_init(); |
c5e438ec |
853 | |
854 | /* |
855 | * Start up the connection. |
856 | */ |
c229ef97 |
857 | logctx = log_init(NULL, &cfg); |
b51259f6 |
858 | console_provide_logctx(logctx); |
c5e438ec |
859 | { |
cbe2d68f |
860 | const char *error; |
c5e438ec |
861 | char *realhost; |
862 | /* nodelay is only useful if stdin is a terminal device */ |
863 | int nodelay = cfg.tcp_nodelay && isatty(0); |
864 | |
86916870 |
865 | error = back->init(NULL, &backhandle, &cfg, cfg.host, cfg.port, |
79bf227b |
866 | &realhost, nodelay, cfg.tcp_keepalives); |
c5e438ec |
867 | if (error) { |
984992ef |
868 | fprintf(stderr, "Unable to open connection:\n%s\n", error); |
c5e438ec |
869 | return 1; |
870 | } |
c5e438ec |
871 | back->provide_logctx(backhandle, logctx); |
fe5634f6 |
872 | ldisc = ldisc_create(&cfg, NULL, back, backhandle, NULL); |
c5e438ec |
873 | sfree(realhost); |
874 | } |
875 | connopen = 1; |
876 | |
877 | /* |
878 | * Set up the initial console mode. We don't care if this call |
879 | * fails, because we know we aren't necessarily running in a |
880 | * console. |
881 | */ |
c6ccd5c2 |
882 | local_tty = (tcgetattr(0, &orig_termios) == 0); |
c5e438ec |
883 | atexit(cleanup_termios); |
884 | ldisc_update(NULL, 1, 1); |
885 | sending = FALSE; |
39934deb |
886 | now = GETTICKCOUNT(); |
c5e438ec |
887 | |
888 | while (1) { |
889 | fd_set rset, wset, xset; |
890 | int maxfd; |
891 | int rwx; |
892 | int ret; |
893 | |
894 | FD_ZERO(&rset); |
895 | FD_ZERO(&wset); |
896 | FD_ZERO(&xset); |
897 | maxfd = 0; |
898 | |
5673d44e |
899 | FD_SET_MAX(signalpipe[0], maxfd, rset); |
900 | |
c5e438ec |
901 | if (connopen && !sending && |
6226c939 |
902 | back->connected(backhandle) && |
c5e438ec |
903 | back->sendok(backhandle) && |
904 | back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) { |
905 | /* If we're OK to send, then try to read from stdin. */ |
906 | FD_SET_MAX(0, maxfd, rset); |
907 | } |
908 | |
909 | if (bufchain_size(&stdout_data) > 0) { |
910 | /* If we have data for stdout, try to write to stdout. */ |
911 | FD_SET_MAX(1, maxfd, wset); |
912 | } |
913 | |
914 | if (bufchain_size(&stderr_data) > 0) { |
915 | /* If we have data for stderr, try to write to stderr. */ |
916 | FD_SET_MAX(2, maxfd, wset); |
917 | } |
918 | |
0ff9ea38 |
919 | /* Count the currently active fds. */ |
c5e438ec |
920 | i = 0; |
0ff9ea38 |
921 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
922 | fd = next_fd(&fdstate, &rwx)) i++; |
c5e438ec |
923 | |
0ff9ea38 |
924 | /* Expand the fdlist buffer if necessary. */ |
925 | if (i > fdsize) { |
926 | fdsize = i + 16; |
927 | fdlist = sresize(fdlist, fdsize, int); |
c5e438ec |
928 | } |
929 | |
930 | /* |
0ff9ea38 |
931 | * Add all currently open fds to the select sets, and store |
932 | * them in fdlist as well. |
c5e438ec |
933 | */ |
0ff9ea38 |
934 | fdcount = 0; |
935 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
936 | fd = next_fd(&fdstate, &rwx)) { |
937 | fdlist[fdcount++] = fd; |
c5e438ec |
938 | if (rwx & 1) |
0ff9ea38 |
939 | FD_SET_MAX(fd, maxfd, rset); |
c5e438ec |
940 | if (rwx & 2) |
0ff9ea38 |
941 | FD_SET_MAX(fd, maxfd, wset); |
c5e438ec |
942 | if (rwx & 4) |
0ff9ea38 |
943 | FD_SET_MAX(fd, maxfd, xset); |
c5e438ec |
944 | } |
945 | |
5673d44e |
946 | do { |
39934deb |
947 | long next, ticks; |
948 | struct timeval tv, *ptv; |
949 | |
950 | if (run_timers(now, &next)) { |
951 | ticks = next - GETTICKCOUNT(); |
952 | if (ticks < 0) ticks = 0; /* just in case */ |
953 | tv.tv_sec = ticks / 1000; |
954 | tv.tv_usec = ticks % 1000 * 1000; |
955 | ptv = &tv; |
956 | } else { |
957 | ptv = NULL; |
958 | } |
959 | ret = select(maxfd, &rset, &wset, &xset, ptv); |
960 | if (ret == 0) |
961 | now = next; |
2ac3322e |
962 | else { |
963 | long newnow = GETTICKCOUNT(); |
964 | /* |
965 | * Check to see whether the system clock has |
966 | * changed massively during the select. |
967 | */ |
968 | if (newnow - now < 0 || newnow - now > next - now) { |
969 | /* |
970 | * If so, look at the elapsed time in the |
971 | * select and use it to compute a new |
972 | * tickcount_offset. |
973 | */ |
974 | long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000; |
975 | /* So we'd like GETTICKCOUNT to have returned othernow, |
976 | * but instead it return newnow. Hence ... */ |
977 | tickcount_offset += othernow - newnow; |
978 | now = othernow; |
979 | } else { |
980 | now = newnow; |
981 | } |
982 | } |
5673d44e |
983 | } while (ret < 0 && errno == EINTR); |
c5e438ec |
984 | |
985 | if (ret < 0) { |
986 | perror("select"); |
987 | exit(1); |
988 | } |
989 | |
0ff9ea38 |
990 | for (i = 0; i < fdcount; i++) { |
991 | fd = fdlist[i]; |
56e5b2db |
992 | /* |
993 | * We must process exceptional notifications before |
994 | * ordinary readability ones, or we may go straight |
995 | * past the urgent marker. |
996 | */ |
0ff9ea38 |
997 | if (FD_ISSET(fd, &xset)) |
998 | select_result(fd, 4); |
999 | if (FD_ISSET(fd, &rset)) |
1000 | select_result(fd, 1); |
1001 | if (FD_ISSET(fd, &wset)) |
1002 | select_result(fd, 2); |
c5e438ec |
1003 | } |
1004 | |
5673d44e |
1005 | if (FD_ISSET(signalpipe[0], &rset)) { |
1006 | char c[1]; |
1007 | struct winsize size; |
1008 | read(signalpipe[0], c, 1); /* ignore its value; it'll be `x' */ |
1009 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
1010 | back->size(backhandle, size.ws_col, size.ws_row); |
1011 | } |
1012 | |
c5e438ec |
1013 | if (FD_ISSET(0, &rset)) { |
1014 | char buf[4096]; |
1015 | int ret; |
1016 | |
6226c939 |
1017 | if (connopen && back->connected(backhandle)) { |
c5e438ec |
1018 | ret = read(0, buf, sizeof(buf)); |
1019 | if (ret < 0) { |
1020 | perror("stdin: read"); |
1021 | exit(1); |
1022 | } else if (ret == 0) { |
1023 | back->special(backhandle, TS_EOF); |
1024 | sending = FALSE; /* send nothing further after this */ |
1025 | } else { |
d0cb8c0c |
1026 | if (local_tty) |
1027 | from_tty(buf, ret); |
1028 | else |
1029 | back->send(backhandle, buf, ret); |
c5e438ec |
1030 | } |
1031 | } |
1032 | } |
1033 | |
1034 | if (FD_ISSET(1, &wset)) { |
1035 | try_output(0); |
1036 | } |
1037 | |
1038 | if (FD_ISSET(2, &wset)) { |
1039 | try_output(1); |
1040 | } |
1041 | |
6226c939 |
1042 | if ((!connopen || !back->connected(backhandle)) && |
c5e438ec |
1043 | bufchain_size(&stdout_data) == 0 && |
1044 | bufchain_size(&stderr_data) == 0) |
1045 | break; /* we closed the connection */ |
1046 | } |
1047 | exitcode = back->exitcode(backhandle); |
1048 | if (exitcode < 0) { |
1049 | fprintf(stderr, "Remote process exit code unavailable\n"); |
1050 | exitcode = 1; /* this is an error condition */ |
1051 | } |
d9c40fd6 |
1052 | cleanup_exit(exitcode); |
1053 | return exitcode; /* shouldn't happen, but placates gcc */ |
c5e438ec |
1054 | } |