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 | |
7bfc5fd0 |
28 | void *logctx; |
29 | |
c5e438ec |
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); |
7bfc5fd0 |
38 | if (logctx) { |
39 | log_free(logctx); |
40 | logctx = NULL; |
41 | } |
c5e438ec |
42 | cleanup_exit(1); |
43 | } |
44 | void modalfatalbox(char *p, ...) |
45 | { |
46 | va_list ap; |
47 | fprintf(stderr, "FATAL ERROR: "); |
48 | va_start(ap, p); |
49 | vfprintf(stderr, p, ap); |
50 | va_end(ap); |
51 | fputc('\n', stderr); |
7bfc5fd0 |
52 | if (logctx) { |
53 | log_free(logctx); |
54 | logctx = NULL; |
55 | } |
c5e438ec |
56 | cleanup_exit(1); |
57 | } |
58 | void connection_fatal(void *frontend, char *p, ...) |
59 | { |
60 | va_list ap; |
61 | fprintf(stderr, "FATAL ERROR: "); |
62 | va_start(ap, p); |
63 | vfprintf(stderr, p, ap); |
64 | va_end(ap); |
65 | fputc('\n', stderr); |
7bfc5fd0 |
66 | if (logctx) { |
67 | log_free(logctx); |
68 | logctx = NULL; |
69 | } |
c5e438ec |
70 | cleanup_exit(1); |
71 | } |
72 | void cmdline_error(char *p, ...) |
73 | { |
74 | va_list ap; |
75 | fprintf(stderr, "plink: "); |
76 | va_start(ap, p); |
77 | vfprintf(stderr, p, ap); |
78 | va_end(ap); |
79 | fputc('\n', stderr); |
80 | exit(1); |
81 | } |
82 | |
c6ccd5c2 |
83 | static int local_tty = 0; /* do we have a local tty? */ |
84 | static struct termios orig_termios; |
c5e438ec |
85 | |
86 | static Backend *back; |
87 | static void *backhandle; |
3ea863a3 |
88 | static Config cfg; |
c5e438ec |
89 | |
5a9eb105 |
90 | /* |
91 | * Default settings that are specific to pterm. |
92 | */ |
c85623f9 |
93 | char *platform_default_s(const char *name) |
5a9eb105 |
94 | { |
5a9eb105 |
95 | if (!strcmp(name, "TermType")) |
799dfcfa |
96 | return dupstr(getenv("TERM")); |
97 | if (!strcmp(name, "UserName")) |
98 | return get_username(); |
aef05b78 |
99 | if (!strcmp(name, "SerialLine")) |
100 | return dupstr("/dev/ttyS0"); |
5a9eb105 |
101 | return NULL; |
102 | } |
103 | |
c85623f9 |
104 | int platform_default_i(const char *name, int def) |
5a9eb105 |
105 | { |
106 | if (!strcmp(name, "TermWidth") || |
107 | !strcmp(name, "TermHeight")) { |
108 | struct winsize size; |
109 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
110 | return (!strcmp(name, "TermWidth") ? size.ws_col : size.ws_row); |
111 | } |
112 | return def; |
113 | } |
114 | |
9a30e26b |
115 | FontSpec platform_default_fontspec(const char *name) |
116 | { |
117 | FontSpec ret; |
118 | *ret.name = '\0'; |
119 | return ret; |
120 | } |
121 | |
122 | Filename platform_default_filename(const char *name) |
123 | { |
124 | Filename ret; |
125 | if (!strcmp(name, "LogFileName")) |
126 | strcpy(ret.path, "putty.log"); |
127 | else |
128 | *ret.path = '\0'; |
129 | return ret; |
130 | } |
131 | |
c85623f9 |
132 | char *x_get_default(const char *key) |
c5e438ec |
133 | { |
134 | return NULL; /* this is a stub */ |
135 | } |
136 | int term_ldisc(Terminal *term, int mode) |
137 | { |
138 | return FALSE; |
139 | } |
140 | void ldisc_update(void *frontend, int echo, int edit) |
141 | { |
142 | /* Update stdin read mode to reflect changes in line discipline. */ |
143 | struct termios mode; |
144 | |
c6ccd5c2 |
145 | if (!local_tty) return; |
146 | |
c5e438ec |
147 | mode = orig_termios; |
148 | |
149 | if (echo) |
150 | mode.c_lflag |= ECHO; |
151 | else |
152 | mode.c_lflag &= ~ECHO; |
153 | |
8cdf0e5f |
154 | if (edit) { |
155 | mode.c_iflag |= ICRNL; |
c5e438ec |
156 | mode.c_lflag |= ISIG | ICANON; |
e8269d30 |
157 | mode.c_oflag |= OPOST; |
8cdf0e5f |
158 | } else { |
159 | mode.c_iflag &= ~ICRNL; |
c5e438ec |
160 | mode.c_lflag &= ~(ISIG | ICANON); |
e8269d30 |
161 | mode.c_oflag &= ~OPOST; |
c6ccd5c2 |
162 | /* Solaris sets these to unhelpful values */ |
259d0428 |
163 | mode.c_cc[VMIN] = 1; |
164 | mode.c_cc[VTIME] = 0; |
c6ccd5c2 |
165 | /* FIXME: perhaps what we do with IXON/IXOFF should be an |
166 | * argument to ldisc_update(), to allow implementation of SSH-2 |
167 | * "xon-xoff" and Rlogin's equivalent? */ |
168 | mode.c_iflag &= ~IXON; |
169 | mode.c_iflag &= ~IXOFF; |
8cdf0e5f |
170 | } |
d0cb8c0c |
171 | /* |
172 | * Mark parity errors and (more important) BREAK on input. This |
173 | * is more complex than it need be because POSIX-2001 suggests |
174 | * that escaping of valid 0xff in the input stream is dependent on |
175 | * IGNPAR being clear even though marking of BREAK isn't. NetBSD |
176 | * 2.0 goes one worse and makes it dependent on INPCK too. We |
177 | * deal with this by forcing these flags into a useful state and |
178 | * then faking the state in which we found them in from_tty() if |
179 | * we get passed a parity or framing error. |
180 | */ |
181 | mode.c_iflag = (mode.c_iflag | INPCK | PARMRK) & ~IGNPAR; |
c5e438ec |
182 | |
183 | tcsetattr(0, TCSANOW, &mode); |
184 | } |
185 | |
c6ccd5c2 |
186 | /* Helper function to extract a special character from a termios. */ |
187 | static char *get_ttychar(struct termios *t, int index) |
188 | { |
189 | cc_t c = t->c_cc[index]; |
190 | #if defined(_POSIX_VDISABLE) |
191 | if (c == _POSIX_VDISABLE) |
192 | return dupprintf(""); |
193 | #endif |
194 | return dupprintf("^<%d>", c); |
195 | } |
196 | |
197 | char *get_ttymode(void *frontend, const char *mode) |
198 | { |
199 | /* |
200 | * Propagate appropriate terminal modes from the local terminal, |
201 | * if any. |
202 | */ |
203 | if (!local_tty) return NULL; |
204 | |
205 | #define GET_CHAR(ourname, uxname) \ |
206 | do { \ |
207 | if (strcmp(mode, ourname) == 0) \ |
208 | return get_ttychar(&orig_termios, uxname); \ |
209 | } while(0) |
210 | #define GET_BOOL(ourname, uxname, uxmemb, transform) \ |
211 | do { \ |
212 | if (strcmp(mode, ourname) == 0) { \ |
213 | int b = (orig_termios.uxmemb & uxname) != 0; \ |
214 | transform; \ |
215 | return dupprintf("%d", b); \ |
216 | } \ |
217 | } while (0) |
218 | |
219 | /* |
220 | * Modes that want to be the same on all terminal devices involved. |
221 | */ |
222 | /* All the special characters supported by SSH */ |
223 | #if defined(VINTR) |
224 | GET_CHAR("INTR", VINTR); |
225 | #endif |
226 | #if defined(VQUIT) |
227 | GET_CHAR("QUIT", VQUIT); |
228 | #endif |
229 | #if defined(VERASE) |
230 | GET_CHAR("ERASE", VERASE); |
231 | #endif |
232 | #if defined(VKILL) |
233 | GET_CHAR("KILL", VKILL); |
234 | #endif |
235 | #if defined(VEOF) |
236 | GET_CHAR("EOF", VEOF); |
237 | #endif |
238 | #if defined(VEOL) |
239 | GET_CHAR("EOL", VEOL); |
240 | #endif |
241 | #if defined(VEOL2) |
242 | GET_CHAR("EOL2", VEOL2); |
243 | #endif |
244 | #if defined(VSTART) |
245 | GET_CHAR("START", VSTART); |
246 | #endif |
247 | #if defined(VSTOP) |
248 | GET_CHAR("STOP", VSTOP); |
249 | #endif |
250 | #if defined(VSUSP) |
251 | GET_CHAR("SUSP", VSUSP); |
252 | #endif |
253 | #if defined(VDSUSP) |
254 | GET_CHAR("DSUSP", VDSUSP); |
255 | #endif |
256 | #if defined(VREPRINT) |
257 | GET_CHAR("REPRINT", VREPRINT); |
258 | #endif |
259 | #if defined(VWERASE) |
260 | GET_CHAR("WERASE", VWERASE); |
261 | #endif |
262 | #if defined(VLNEXT) |
263 | GET_CHAR("LNEXT", VLNEXT); |
264 | #endif |
265 | #if defined(VFLUSH) |
266 | GET_CHAR("FLUSH", VFLUSH); |
267 | #endif |
268 | #if defined(VSWTCH) |
269 | GET_CHAR("SWTCH", VSWTCH); |
270 | #endif |
271 | #if defined(VSTATUS) |
272 | GET_CHAR("STATUS", VSTATUS); |
273 | #endif |
274 | #if defined(VDISCARD) |
275 | GET_CHAR("DISCARD", VDISCARD); |
276 | #endif |
277 | /* Modes that "configure" other major modes. These should probably be |
278 | * considered as user preferences. */ |
279 | /* Configuration of ICANON */ |
280 | #if defined(ECHOK) |
281 | GET_BOOL("ECHOK", ECHOK, c_lflag, ); |
282 | #endif |
283 | #if defined(ECHOKE) |
284 | GET_BOOL("ECHOKE", ECHOKE, c_lflag, ); |
285 | #endif |
286 | #if defined(ECHOE) |
287 | GET_BOOL("ECHOE", ECHOE, c_lflag, ); |
288 | #endif |
289 | #if defined(ECHONL) |
290 | GET_BOOL("ECHONL", ECHONL, c_lflag, ); |
291 | #endif |
292 | #if defined(XCASE) |
293 | GET_BOOL("XCASE", XCASE, c_lflag, ); |
294 | #endif |
295 | /* Configuration of ECHO */ |
296 | #if defined(ECHOCTL) |
297 | GET_BOOL("ECHOCTL", ECHOCTL, c_lflag, ); |
298 | #endif |
299 | /* Configuration of IXON/IXOFF */ |
300 | #if defined(IXANY) |
301 | GET_BOOL("IXANY", IXANY, c_iflag, ); |
302 | #endif |
e8269d30 |
303 | /* Configuration of OPOST */ |
7016cde4 |
304 | #if defined(OLCUC) |
305 | GET_BOOL("OLCUC", OLCUC, c_oflag, ); |
306 | #endif |
e8269d30 |
307 | #if defined(ONLCR) |
308 | GET_BOOL("ONLCR", ONLCR, c_oflag, ); |
309 | #endif |
310 | #if defined(OCRNL) |
311 | GET_BOOL("OCRNL", OCRNL, c_oflag, ); |
312 | #endif |
313 | #if defined(ONOCR) |
314 | GET_BOOL("ONOCR", ONOCR, c_oflag, ); |
315 | #endif |
20923089 |
316 | #if defined(ONLRET) |
e8269d30 |
317 | GET_BOOL("ONLRET", ONLRET, c_oflag, ); |
318 | #endif |
c6ccd5c2 |
319 | |
320 | /* |
321 | * Modes that want to be set in only one place, and that we have |
322 | * squashed locally. |
323 | */ |
324 | #if defined(ISIG) |
325 | GET_BOOL("ISIG", ISIG, c_lflag, ); |
326 | #endif |
327 | #if defined(ICANON) |
328 | GET_BOOL("ICANON", ICANON, c_lflag, ); |
329 | #endif |
330 | #if defined(ECHO) |
331 | GET_BOOL("ECHO", ECHO, c_lflag, ); |
332 | #endif |
333 | #if defined(IXON) |
334 | GET_BOOL("IXON", IXON, c_iflag, ); |
335 | #endif |
336 | #if defined(IXOFF) |
337 | GET_BOOL("IXOFF", IXOFF, c_iflag, ); |
338 | #endif |
e8269d30 |
339 | #if defined(OPOST) |
340 | GET_BOOL("OPOST", OPOST, c_oflag, ); |
341 | #endif |
c6ccd5c2 |
342 | |
343 | /* |
344 | * We do not propagate the following modes: |
345 | * - Parity/serial settings, which are a local affair and don't |
346 | * make sense propagated over SSH's 8-bit byte-stream. |
347 | * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD |
348 | * - Things that want to be enabled in one place that we don't |
349 | * squash locally. |
7016cde4 |
350 | * IUCLC |
c6ccd5c2 |
351 | * - Status bits. |
352 | * PENDIN |
353 | * - Things I don't know what to do with. (FIXME) |
e8269d30 |
354 | * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN |
355 | * INLCR IGNCR ICRNL |
c6ccd5c2 |
356 | */ |
357 | |
358 | #undef GET_CHAR |
359 | #undef GET_BOOL |
360 | |
361 | /* Fall through to here for unrecognised names, or ones that are |
362 | * unsupported on this platform */ |
363 | return NULL; |
364 | } |
365 | |
c5e438ec |
366 | void cleanup_termios(void) |
367 | { |
c6ccd5c2 |
368 | if (local_tty) |
369 | tcsetattr(0, TCSANOW, &orig_termios); |
c5e438ec |
370 | } |
371 | |
372 | bufchain stdout_data, stderr_data; |
373 | |
374 | void try_output(int is_stderr) |
375 | { |
376 | bufchain *chain = (is_stderr ? &stderr_data : &stdout_data); |
377 | int fd = (is_stderr ? 2 : 1); |
378 | void *senddata; |
379 | int sendlen, ret; |
380 | |
d69a46c0 |
381 | if (bufchain_size(chain) == 0) |
382 | return; |
383 | |
c5e438ec |
384 | bufchain_prefix(chain, &senddata, &sendlen); |
385 | ret = write(fd, senddata, sendlen); |
386 | if (ret > 0) |
387 | bufchain_consume(chain, ret); |
388 | else if (ret < 0) { |
389 | perror(is_stderr ? "stderr: write" : "stdout: write"); |
390 | exit(1); |
391 | } |
392 | } |
393 | |
9fab77dc |
394 | int from_backend(void *frontend_handle, int is_stderr, |
395 | const char *data, int len) |
c5e438ec |
396 | { |
397 | int osize, esize; |
398 | |
c5e438ec |
399 | if (is_stderr) { |
400 | bufchain_add(&stderr_data, data, len); |
401 | try_output(1); |
402 | } else { |
403 | bufchain_add(&stdout_data, data, len); |
404 | try_output(0); |
405 | } |
406 | |
407 | osize = bufchain_size(&stdout_data); |
408 | esize = bufchain_size(&stderr_data); |
409 | |
410 | return osize + esize; |
411 | } |
412 | |
edd0cb8a |
413 | int from_backend_untrusted(void *frontend_handle, const char *data, int len) |
414 | { |
415 | /* |
416 | * No "untrusted" output should get here (the way the code is |
417 | * currently, it's all diverted by FLAG_STDERR). |
418 | */ |
419 | assert(!"Unexpected call to from_backend_untrusted()"); |
420 | return 0; /* not reached */ |
421 | } |
422 | |
423 | int get_userpass_input(prompts_t *p, unsigned char *in, int inlen) |
424 | { |
425 | int ret; |
426 | ret = cmdline_get_passwd_input(p, in, inlen); |
427 | if (ret == -1) |
428 | ret = console_get_userpass_input(p, in, inlen); |
429 | return ret; |
430 | } |
431 | |
d0cb8c0c |
432 | /* |
433 | * Handle data from a local tty in PARMRK format. |
434 | */ |
deb0e1cf |
435 | static void from_tty(void *vbuf, unsigned len) |
d0cb8c0c |
436 | { |
deb0e1cf |
437 | char *p, *q, *end, *buf = vbuf; |
d0cb8c0c |
438 | static enum {NORMAL, FF, FF00} state = NORMAL; |
439 | |
440 | p = buf; end = buf + len; |
441 | while (p < end) { |
442 | switch (state) { |
443 | case NORMAL: |
444 | if (*p == '\xff') { |
445 | p++; |
446 | state = FF; |
447 | } else { |
448 | q = memchr(p, '\xff', end - p); |
449 | if (q == NULL) q = end; |
450 | back->send(backhandle, p, q - p); |
451 | p = q; |
452 | } |
453 | break; |
454 | case FF: |
455 | if (*p == '\xff') { |
456 | back->send(backhandle, p, 1); |
457 | p++; |
458 | state = NORMAL; |
459 | } else if (*p == '\0') { |
460 | p++; |
461 | state = FF00; |
462 | } else abort(); |
463 | break; |
464 | case FF00: |
465 | if (*p == '\0') { |
466 | back->special(backhandle, TS_BRK); |
467 | } else { |
468 | /* |
469 | * Pretend that PARMRK wasn't set. This involves |
470 | * faking what INPCK and IGNPAR would have done if |
471 | * we hadn't overridden them. Unfortunately, we |
472 | * can't do this entirely correctly because INPCK |
473 | * distinguishes between framing and parity |
474 | * errors, but PARMRK format represents both in |
475 | * the same way. We assume that parity errors are |
476 | * more common than framing errors, and hence |
477 | * treat all input errors as being subject to |
478 | * INPCK. |
479 | */ |
480 | if (orig_termios.c_iflag & INPCK) { |
481 | /* If IGNPAR is set, we throw away the character. */ |
482 | if (!(orig_termios.c_iflag & IGNPAR)) { |
483 | /* PE/FE get passed on as NUL. */ |
484 | *p = 0; |
485 | back->send(backhandle, p, 1); |
486 | } |
487 | } else { |
488 | /* INPCK not set. Assume we got a parity error. */ |
489 | back->send(backhandle, p, 1); |
490 | } |
491 | } |
492 | p++; |
493 | state = NORMAL; |
494 | } |
495 | } |
496 | } |
497 | |
5673d44e |
498 | int signalpipe[2]; |
499 | |
500 | void sigwinch(int signum) |
501 | { |
502 | write(signalpipe[1], "x", 1); |
503 | } |
504 | |
c5e438ec |
505 | /* |
74aca06d |
506 | * In Plink our selects are synchronous, so these functions are |
507 | * empty stubs. |
508 | */ |
509 | int uxsel_input_add(int fd, int rwx) { return 0; } |
510 | void uxsel_input_remove(int id) { } |
511 | |
512 | /* |
c5e438ec |
513 | * Short description of parameters. |
514 | */ |
515 | static void usage(void) |
516 | { |
517 | printf("PuTTY Link: command-line connection utility\n"); |
518 | printf("%s\n", ver); |
519 | printf("Usage: plink [options] [user@]host [command]\n"); |
520 | printf(" (\"host\" can also be a PuTTY saved session name)\n"); |
521 | printf("Options:\n"); |
2285d016 |
522 | printf(" -V print version information and exit\n"); |
523 | printf(" -pgpfp print PGP key fingerprints and exit\n"); |
c5e438ec |
524 | printf(" -v show verbose messages\n"); |
525 | printf(" -load sessname Load settings from saved session\n"); |
526 | printf(" -ssh -telnet -rlogin -raw\n"); |
afd4d0d2 |
527 | printf(" force use of a particular protocol\n"); |
c5e438ec |
528 | printf(" -P port connect to specified port\n"); |
529 | printf(" -l user connect with specified username\n"); |
c5e438ec |
530 | printf(" -batch disable all interactive prompts\n"); |
531 | printf("The following options only apply to SSH connections:\n"); |
532 | printf(" -pw passw login with specified password\n"); |
dbe6c525 |
533 | printf(" -D [listen-IP:]listen-port\n"); |
534 | printf(" Dynamic SOCKS-based port forwarding\n"); |
535 | printf(" -L [listen-IP:]listen-port:host:port\n"); |
536 | printf(" Forward local port to remote address\n"); |
537 | printf(" -R [listen-IP:]listen-port:host:port\n"); |
538 | printf(" Forward remote port to local address\n"); |
c5e438ec |
539 | printf(" -X -x enable / disable X11 forwarding\n"); |
540 | printf(" -A -a enable / disable agent forwarding\n"); |
541 | printf(" -t -T enable / disable pty allocation\n"); |
542 | printf(" -1 -2 force use of particular protocol version\n"); |
05581745 |
543 | printf(" -4 -6 force use of IPv4 or IPv6\n"); |
c5e438ec |
544 | printf(" -C enable compression\n"); |
545 | printf(" -i key private key file for authentication\n"); |
e5708bc7 |
546 | printf(" -noagent disable use of Pageant\n"); |
547 | printf(" -agent enable use of Pageant\n"); |
54018d95 |
548 | printf(" -m file read remote command(s) from file\n"); |
09bdfcbb |
549 | printf(" -s remote command is an SSH subsystem (SSH-2 only)\n"); |
b72c366d |
550 | printf(" -N don't start a shell/command (SSH-2 only)\n"); |
23828b7e |
551 | printf(" -nc host:port\n"); |
552 | printf(" open tunnel in place of session (SSH-2 only)\n"); |
dc108ebc |
553 | exit(1); |
554 | } |
555 | |
556 | static void version(void) |
557 | { |
558 | printf("plink: %s\n", ver); |
c5e438ec |
559 | exit(1); |
560 | } |
561 | |
562 | int main(int argc, char **argv) |
563 | { |
564 | int sending; |
565 | int portnumber = -1; |
0ff9ea38 |
566 | int *fdlist; |
567 | int fd; |
568 | int i, fdcount, fdsize, fdstate; |
c5e438ec |
569 | int connopen; |
570 | int exitcode; |
86256dc6 |
571 | int errors; |
09bdfcbb |
572 | int use_subsystem = 0; |
7bfc5fd0 |
573 | void *ldisc; |
39934deb |
574 | long now; |
c5e438ec |
575 | |
0ff9ea38 |
576 | fdlist = NULL; |
577 | fdcount = fdsize = 0; |
c5e438ec |
578 | /* |
579 | * Initialise port and protocol to sensible defaults. (These |
580 | * will be overridden by more or less anything.) |
581 | */ |
582 | default_protocol = PROT_SSH; |
583 | default_port = 22; |
584 | |
585 | flags = FLAG_STDERR; |
586 | /* |
587 | * Process the command line. |
588 | */ |
589 | do_defaults(NULL, &cfg); |
18e62ad8 |
590 | loaded_session = FALSE; |
c5e438ec |
591 | default_protocol = cfg.protocol; |
592 | default_port = cfg.port; |
86256dc6 |
593 | errors = 0; |
c5e438ec |
594 | { |
595 | /* |
596 | * Override the default protocol if PLINK_PROTOCOL is set. |
597 | */ |
598 | char *p = getenv("PLINK_PROTOCOL"); |
c5e438ec |
599 | if (p) { |
9e164d82 |
600 | const Backend *b = backend_from_name(p); |
601 | if (b) { |
602 | default_protocol = cfg.protocol = b->protocol; |
603 | default_port = cfg.port = b->default_port; |
c5e438ec |
604 | } |
605 | } |
606 | } |
607 | while (--argc) { |
608 | char *p = *++argv; |
609 | if (*p == '-') { |
9b41d3a8 |
610 | int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL), |
611 | 1, &cfg); |
c5e438ec |
612 | if (ret == -2) { |
613 | fprintf(stderr, |
614 | "plink: option \"%s\" requires an argument\n", p); |
86256dc6 |
615 | errors = 1; |
c5e438ec |
616 | } else if (ret == 2) { |
617 | --argc, ++argv; |
618 | } else if (ret == 1) { |
619 | continue; |
620 | } else if (!strcmp(p, "-batch")) { |
621 | console_batch_mode = 1; |
09bdfcbb |
622 | } else if (!strcmp(p, "-s")) { |
623 | /* Save status to write to cfg later. */ |
624 | use_subsystem = 1; |
dc108ebc |
625 | } else if (!strcmp(p, "-V")) { |
626 | version(); |
2285d016 |
627 | } else if (!strcmp(p, "-pgpfp")) { |
628 | pgp_fingerprints(); |
629 | exit(1); |
a0e5ed33 |
630 | } else if (!strcmp(p, "-o")) { |
86256dc6 |
631 | if (argc <= 1) { |
a0e5ed33 |
632 | fprintf(stderr, |
633 | "plink: option \"-o\" requires an argument\n"); |
86256dc6 |
634 | errors = 1; |
635 | } else { |
636 | --argc; |
637 | provide_xrm_string(*++argv); |
638 | } |
639 | } else { |
640 | fprintf(stderr, "plink: unknown option \"%s\"\n", p); |
641 | errors = 1; |
c5e438ec |
642 | } |
643 | } else if (*p) { |
aef05b78 |
644 | if (!cfg_launchable(&cfg)) { |
c5e438ec |
645 | char *q = p; |
a0e5ed33 |
646 | |
c5e438ec |
647 | /* |
648 | * If the hostname starts with "telnet:", set the |
649 | * protocol to Telnet and process the string as a |
650 | * Telnet URL. |
651 | */ |
652 | if (!strncmp(q, "telnet:", 7)) { |
653 | char c; |
654 | |
655 | q += 7; |
656 | if (q[0] == '/' && q[1] == '/') |
657 | q += 2; |
658 | cfg.protocol = PROT_TELNET; |
659 | p = q; |
660 | while (*p && *p != ':' && *p != '/') |
661 | p++; |
662 | c = *p; |
663 | if (*p) |
664 | *p++ = '\0'; |
665 | if (c == ':') |
666 | cfg.port = atoi(p); |
667 | else |
668 | cfg.port = -1; |
669 | strncpy(cfg.host, q, sizeof(cfg.host) - 1); |
670 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
671 | } else { |
3608528b |
672 | char *r, *user, *host; |
c5e438ec |
673 | /* |
674 | * Before we process the [user@]host string, we |
675 | * first check for the presence of a protocol |
676 | * prefix (a protocol name followed by ","). |
677 | */ |
678 | r = strchr(p, ','); |
679 | if (r) { |
9e164d82 |
680 | const Backend *b; |
681 | *r = '\0'; |
682 | b = backend_from_name(p); |
683 | if (b) { |
684 | default_protocol = cfg.protocol = b->protocol; |
685 | portnumber = b->default_port; |
c5e438ec |
686 | } |
9e164d82 |
687 | p = r + 1; |
c5e438ec |
688 | } |
689 | |
690 | /* |
3608528b |
691 | * A nonzero length string followed by an @ is treated |
692 | * as a username. (We discount an _initial_ @.) The |
693 | * rest of the string (or the whole string if no @) |
694 | * is treated as a session name and/or hostname. |
c5e438ec |
695 | */ |
696 | r = strrchr(p, '@'); |
697 | if (r == p) |
698 | p++, r = NULL; /* discount initial @ */ |
3608528b |
699 | if (r) { |
700 | *r++ = '\0'; |
701 | user = p, host = r; |
702 | } else { |
703 | user = NULL, host = p; |
704 | } |
705 | |
706 | /* |
707 | * Now attempt to load a saved session with the |
708 | * same name as the hostname. |
709 | */ |
710 | { |
c5e438ec |
711 | Config cfg2; |
3608528b |
712 | do_defaults(host, &cfg2); |
aef05b78 |
713 | if (loaded_session || !cfg_launchable(&cfg2)) { |
c5e438ec |
714 | /* No settings for this host; use defaults */ |
18e62ad8 |
715 | /* (or session was already loaded with -load) */ |
3608528b |
716 | strncpy(cfg.host, host, sizeof(cfg.host) - 1); |
c5e438ec |
717 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
718 | cfg.port = default_port; |
719 | } else { |
720 | cfg = cfg2; |
c5e438ec |
721 | } |
3608528b |
722 | } |
723 | |
724 | if (user) { |
725 | /* Patch in specified username. */ |
726 | strncpy(cfg.username, user, |
727 | sizeof(cfg.username) - 1); |
c5e438ec |
728 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
c5e438ec |
729 | } |
3608528b |
730 | |
c5e438ec |
731 | } |
732 | } else { |
733 | char *command; |
734 | int cmdlen, cmdsize; |
735 | cmdlen = cmdsize = 0; |
736 | command = NULL; |
737 | |
738 | while (argc) { |
739 | while (*p) { |
740 | if (cmdlen >= cmdsize) { |
741 | cmdsize = cmdlen + 512; |
3d88e64d |
742 | command = sresize(command, cmdsize, char); |
c5e438ec |
743 | } |
744 | command[cmdlen++]=*p++; |
745 | } |
746 | if (cmdlen >= cmdsize) { |
747 | cmdsize = cmdlen + 512; |
3d88e64d |
748 | command = sresize(command, cmdsize, char); |
c5e438ec |
749 | } |
750 | command[cmdlen++]=' '; /* always add trailing space */ |
751 | if (--argc) p = *++argv; |
752 | } |
753 | if (cmdlen) command[--cmdlen]='\0'; |
754 | /* change trailing blank to NUL */ |
755 | cfg.remote_cmd_ptr = command; |
756 | cfg.remote_cmd_ptr2 = NULL; |
757 | cfg.nopty = TRUE; /* command => no terminal */ |
758 | |
759 | break; /* done with cmdline */ |
760 | } |
761 | } |
762 | } |
763 | |
86256dc6 |
764 | if (errors) |
765 | return 1; |
766 | |
aef05b78 |
767 | if (!cfg_launchable(&cfg)) { |
c5e438ec |
768 | usage(); |
769 | } |
770 | |
771 | /* |
772 | * Trim leading whitespace off the hostname if it's there. |
773 | */ |
774 | { |
775 | int space = strspn(cfg.host, " \t"); |
776 | memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space); |
777 | } |
778 | |
779 | /* See if host is of the form user@host */ |
780 | if (cfg.host[0] != '\0') { |
5dd103a8 |
781 | char *atsign = strrchr(cfg.host, '@'); |
c5e438ec |
782 | /* Make sure we're not overflowing the user field */ |
783 | if (atsign) { |
784 | if (atsign - cfg.host < sizeof cfg.username) { |
785 | strncpy(cfg.username, cfg.host, atsign - cfg.host); |
786 | cfg.username[atsign - cfg.host] = '\0'; |
787 | } |
788 | memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1)); |
789 | } |
790 | } |
791 | |
792 | /* |
793 | * Perform command-line overrides on session configuration. |
794 | */ |
9b41d3a8 |
795 | cmdline_run_saved(&cfg); |
c5e438ec |
796 | |
797 | /* |
09bdfcbb |
798 | * Apply subsystem status. |
799 | */ |
800 | if (use_subsystem) |
801 | cfg.ssh_subsys = TRUE; |
802 | |
803 | /* |
c5e438ec |
804 | * Trim a colon suffix off the hostname if it's there. |
805 | */ |
806 | cfg.host[strcspn(cfg.host, ":")] = '\0'; |
807 | |
808 | /* |
809 | * Remove any remaining whitespace from the hostname. |
810 | */ |
811 | { |
812 | int p1 = 0, p2 = 0; |
813 | while (cfg.host[p2] != '\0') { |
814 | if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') { |
815 | cfg.host[p1] = cfg.host[p2]; |
816 | p1++; |
817 | } |
818 | p2++; |
819 | } |
820 | cfg.host[p1] = '\0'; |
821 | } |
822 | |
feb02b4e |
823 | if (!cfg.remote_cmd_ptr && !*cfg.remote_cmd && !*cfg.ssh_nc_host) |
c5e438ec |
824 | flags |= FLAG_INTERACTIVE; |
825 | |
826 | /* |
827 | * Select protocol. This is farmed out into a table in a |
828 | * separate file to enable an ssh-free variant. |
829 | */ |
9e164d82 |
830 | back = backend_from_proto(cfg.protocol); |
831 | if (back == NULL) { |
832 | fprintf(stderr, |
833 | "Internal fault: Unsupported protocol found\n"); |
834 | return 1; |
c5e438ec |
835 | } |
836 | |
837 | /* |
838 | * Select port. |
839 | */ |
840 | if (portnumber != -1) |
841 | cfg.port = portnumber; |
842 | |
5673d44e |
843 | /* |
844 | * Set up the pipe we'll use to tell us about SIGWINCH. |
845 | */ |
846 | if (pipe(signalpipe) < 0) { |
847 | perror("pipe"); |
848 | exit(1); |
849 | } |
850 | putty_signal(SIGWINCH, sigwinch); |
851 | |
c5e438ec |
852 | sk_init(); |
0ff9ea38 |
853 | uxsel_init(); |
c5e438ec |
854 | |
855 | /* |
856 | * Start up the connection. |
857 | */ |
c229ef97 |
858 | logctx = log_init(NULL, &cfg); |
b51259f6 |
859 | console_provide_logctx(logctx); |
c5e438ec |
860 | { |
cbe2d68f |
861 | const char *error; |
c5e438ec |
862 | char *realhost; |
863 | /* nodelay is only useful if stdin is a terminal device */ |
864 | int nodelay = cfg.tcp_nodelay && isatty(0); |
865 | |
86916870 |
866 | error = back->init(NULL, &backhandle, &cfg, cfg.host, cfg.port, |
79bf227b |
867 | &realhost, nodelay, cfg.tcp_keepalives); |
c5e438ec |
868 | if (error) { |
984992ef |
869 | fprintf(stderr, "Unable to open connection:\n%s\n", error); |
c5e438ec |
870 | return 1; |
871 | } |
c5e438ec |
872 | back->provide_logctx(backhandle, logctx); |
fe5634f6 |
873 | ldisc = ldisc_create(&cfg, NULL, back, backhandle, NULL); |
c5e438ec |
874 | sfree(realhost); |
875 | } |
876 | connopen = 1; |
877 | |
878 | /* |
879 | * Set up the initial console mode. We don't care if this call |
880 | * fails, because we know we aren't necessarily running in a |
881 | * console. |
882 | */ |
c6ccd5c2 |
883 | local_tty = (tcgetattr(0, &orig_termios) == 0); |
c5e438ec |
884 | atexit(cleanup_termios); |
885 | ldisc_update(NULL, 1, 1); |
886 | sending = FALSE; |
39934deb |
887 | now = GETTICKCOUNT(); |
c5e438ec |
888 | |
889 | while (1) { |
890 | fd_set rset, wset, xset; |
891 | int maxfd; |
892 | int rwx; |
893 | int ret; |
894 | |
895 | FD_ZERO(&rset); |
896 | FD_ZERO(&wset); |
897 | FD_ZERO(&xset); |
898 | maxfd = 0; |
899 | |
5673d44e |
900 | FD_SET_MAX(signalpipe[0], maxfd, rset); |
901 | |
c5e438ec |
902 | if (connopen && !sending && |
6226c939 |
903 | back->connected(backhandle) && |
c5e438ec |
904 | back->sendok(backhandle) && |
905 | back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) { |
906 | /* If we're OK to send, then try to read from stdin. */ |
907 | FD_SET_MAX(0, maxfd, rset); |
908 | } |
909 | |
910 | if (bufchain_size(&stdout_data) > 0) { |
911 | /* If we have data for stdout, try to write to stdout. */ |
912 | FD_SET_MAX(1, maxfd, wset); |
913 | } |
914 | |
915 | if (bufchain_size(&stderr_data) > 0) { |
916 | /* If we have data for stderr, try to write to stderr. */ |
917 | FD_SET_MAX(2, maxfd, wset); |
918 | } |
919 | |
0ff9ea38 |
920 | /* Count the currently active fds. */ |
c5e438ec |
921 | i = 0; |
0ff9ea38 |
922 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
923 | fd = next_fd(&fdstate, &rwx)) i++; |
c5e438ec |
924 | |
0ff9ea38 |
925 | /* Expand the fdlist buffer if necessary. */ |
926 | if (i > fdsize) { |
927 | fdsize = i + 16; |
928 | fdlist = sresize(fdlist, fdsize, int); |
c5e438ec |
929 | } |
930 | |
931 | /* |
0ff9ea38 |
932 | * Add all currently open fds to the select sets, and store |
933 | * them in fdlist as well. |
c5e438ec |
934 | */ |
0ff9ea38 |
935 | fdcount = 0; |
936 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
937 | fd = next_fd(&fdstate, &rwx)) { |
938 | fdlist[fdcount++] = fd; |
c5e438ec |
939 | if (rwx & 1) |
0ff9ea38 |
940 | FD_SET_MAX(fd, maxfd, rset); |
c5e438ec |
941 | if (rwx & 2) |
0ff9ea38 |
942 | FD_SET_MAX(fd, maxfd, wset); |
c5e438ec |
943 | if (rwx & 4) |
0ff9ea38 |
944 | FD_SET_MAX(fd, maxfd, xset); |
c5e438ec |
945 | } |
946 | |
5673d44e |
947 | do { |
39934deb |
948 | long next, ticks; |
949 | struct timeval tv, *ptv; |
950 | |
951 | if (run_timers(now, &next)) { |
952 | ticks = next - GETTICKCOUNT(); |
953 | if (ticks < 0) ticks = 0; /* just in case */ |
954 | tv.tv_sec = ticks / 1000; |
955 | tv.tv_usec = ticks % 1000 * 1000; |
956 | ptv = &tv; |
957 | } else { |
958 | ptv = NULL; |
959 | } |
960 | ret = select(maxfd, &rset, &wset, &xset, ptv); |
961 | if (ret == 0) |
962 | now = next; |
2ac3322e |
963 | else { |
964 | long newnow = GETTICKCOUNT(); |
965 | /* |
966 | * Check to see whether the system clock has |
967 | * changed massively during the select. |
968 | */ |
969 | if (newnow - now < 0 || newnow - now > next - now) { |
970 | /* |
971 | * If so, look at the elapsed time in the |
972 | * select and use it to compute a new |
973 | * tickcount_offset. |
974 | */ |
975 | long othernow = now + tv.tv_sec * 1000 + tv.tv_usec / 1000; |
976 | /* So we'd like GETTICKCOUNT to have returned othernow, |
977 | * but instead it return newnow. Hence ... */ |
978 | tickcount_offset += othernow - newnow; |
979 | now = othernow; |
980 | } else { |
981 | now = newnow; |
982 | } |
983 | } |
5673d44e |
984 | } while (ret < 0 && errno == EINTR); |
c5e438ec |
985 | |
986 | if (ret < 0) { |
987 | perror("select"); |
988 | exit(1); |
989 | } |
990 | |
0ff9ea38 |
991 | for (i = 0; i < fdcount; i++) { |
992 | fd = fdlist[i]; |
56e5b2db |
993 | /* |
994 | * We must process exceptional notifications before |
995 | * ordinary readability ones, or we may go straight |
996 | * past the urgent marker. |
997 | */ |
0ff9ea38 |
998 | if (FD_ISSET(fd, &xset)) |
999 | select_result(fd, 4); |
1000 | if (FD_ISSET(fd, &rset)) |
1001 | select_result(fd, 1); |
1002 | if (FD_ISSET(fd, &wset)) |
1003 | select_result(fd, 2); |
c5e438ec |
1004 | } |
1005 | |
5673d44e |
1006 | if (FD_ISSET(signalpipe[0], &rset)) { |
1007 | char c[1]; |
1008 | struct winsize size; |
1009 | read(signalpipe[0], c, 1); /* ignore its value; it'll be `x' */ |
1010 | if (ioctl(0, TIOCGWINSZ, (void *)&size) >= 0) |
1011 | back->size(backhandle, size.ws_col, size.ws_row); |
1012 | } |
1013 | |
c5e438ec |
1014 | if (FD_ISSET(0, &rset)) { |
1015 | char buf[4096]; |
1016 | int ret; |
1017 | |
6226c939 |
1018 | if (connopen && back->connected(backhandle)) { |
c5e438ec |
1019 | ret = read(0, buf, sizeof(buf)); |
1020 | if (ret < 0) { |
1021 | perror("stdin: read"); |
1022 | exit(1); |
1023 | } else if (ret == 0) { |
1024 | back->special(backhandle, TS_EOF); |
1025 | sending = FALSE; /* send nothing further after this */ |
1026 | } else { |
d0cb8c0c |
1027 | if (local_tty) |
1028 | from_tty(buf, ret); |
1029 | else |
1030 | back->send(backhandle, buf, ret); |
c5e438ec |
1031 | } |
1032 | } |
1033 | } |
1034 | |
1035 | if (FD_ISSET(1, &wset)) { |
1036 | try_output(0); |
1037 | } |
1038 | |
1039 | if (FD_ISSET(2, &wset)) { |
1040 | try_output(1); |
1041 | } |
1042 | |
6226c939 |
1043 | if ((!connopen || !back->connected(backhandle)) && |
c5e438ec |
1044 | bufchain_size(&stdout_data) == 0 && |
1045 | bufchain_size(&stderr_data) == 0) |
1046 | break; /* we closed the connection */ |
1047 | } |
1048 | exitcode = back->exitcode(backhandle); |
1049 | if (exitcode < 0) { |
1050 | fprintf(stderr, "Remote process exit code unavailable\n"); |
1051 | exitcode = 1; /* this is an error condition */ |
1052 | } |
d9c40fd6 |
1053 | cleanup_exit(exitcode); |
1054 | return exitcode; /* shouldn't happen, but placates gcc */ |
c5e438ec |
1055 | } |