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 | |
f7397dc6 |
30 | static struct termios orig_termios; |
31 | |
c5e438ec |
32 | void fatalbox(char *p, ...) |
33 | { |
f7397dc6 |
34 | struct termios cf; |
c5e438ec |
35 | va_list ap; |
f7397dc6 |
36 | premsg(&cf); |
c5e438ec |
37 | fprintf(stderr, "FATAL ERROR: "); |
38 | va_start(ap, p); |
39 | vfprintf(stderr, p, ap); |
40 | va_end(ap); |
41 | fputc('\n', stderr); |
f7397dc6 |
42 | postmsg(&cf); |
7bfc5fd0 |
43 | if (logctx) { |
44 | log_free(logctx); |
45 | logctx = NULL; |
46 | } |
c5e438ec |
47 | cleanup_exit(1); |
48 | } |
49 | void modalfatalbox(char *p, ...) |
50 | { |
f7397dc6 |
51 | struct termios cf; |
c5e438ec |
52 | va_list ap; |
f7397dc6 |
53 | premsg(&cf); |
c5e438ec |
54 | fprintf(stderr, "FATAL ERROR: "); |
55 | va_start(ap, p); |
56 | vfprintf(stderr, p, ap); |
57 | va_end(ap); |
58 | fputc('\n', stderr); |
f7397dc6 |
59 | postmsg(&cf); |
7bfc5fd0 |
60 | if (logctx) { |
61 | log_free(logctx); |
62 | logctx = NULL; |
63 | } |
c5e438ec |
64 | cleanup_exit(1); |
65 | } |
66 | void connection_fatal(void *frontend, char *p, ...) |
67 | { |
f7397dc6 |
68 | struct termios cf; |
c5e438ec |
69 | va_list ap; |
f7397dc6 |
70 | premsg(&cf); |
c5e438ec |
71 | fprintf(stderr, "FATAL ERROR: "); |
72 | va_start(ap, p); |
73 | vfprintf(stderr, p, ap); |
74 | va_end(ap); |
75 | fputc('\n', stderr); |
f7397dc6 |
76 | postmsg(&cf); |
7bfc5fd0 |
77 | if (logctx) { |
78 | log_free(logctx); |
79 | logctx = NULL; |
80 | } |
c5e438ec |
81 | cleanup_exit(1); |
82 | } |
83 | void cmdline_error(char *p, ...) |
84 | { |
f7397dc6 |
85 | struct termios cf; |
c5e438ec |
86 | va_list ap; |
f7397dc6 |
87 | premsg(&cf); |
c5e438ec |
88 | fprintf(stderr, "plink: "); |
89 | va_start(ap, p); |
90 | vfprintf(stderr, p, ap); |
91 | va_end(ap); |
92 | fputc('\n', stderr); |
f7397dc6 |
93 | postmsg(&cf); |
c5e438ec |
94 | exit(1); |
95 | } |
96 | |
21226fd7 |
97 | static int local_tty = FALSE; /* do we have a local tty? */ |
c5e438ec |
98 | |
99 | static Backend *back; |
100 | static void *backhandle; |
4a693cfc |
101 | static Conf *conf; |
c5e438ec |
102 | |
5a9eb105 |
103 | /* |
104 | * Default settings that are specific to pterm. |
105 | */ |
c85623f9 |
106 | char *platform_default_s(const char *name) |
5a9eb105 |
107 | { |
5a9eb105 |
108 | if (!strcmp(name, "TermType")) |
799dfcfa |
109 | return dupstr(getenv("TERM")); |
42af6a67 |
110 | if (!strcmp(name, "UserName")) |
111 | return get_username(); |
aef05b78 |
112 | if (!strcmp(name, "SerialLine")) |
113 | return dupstr("/dev/ttyS0"); |
5a9eb105 |
114 | return NULL; |
115 | } |
116 | |
c85623f9 |
117 | int platform_default_i(const char *name, int def) |
5a9eb105 |
118 | { |
5a9eb105 |
119 | return def; |
120 | } |
121 | |
ae62eaeb |
122 | FontSpec *platform_default_fontspec(const char *name) |
9a30e26b |
123 | { |
ae62eaeb |
124 | return fontspec_new(""); |
9a30e26b |
125 | } |
126 | |
962468d4 |
127 | Filename *platform_default_filename(const char *name) |
9a30e26b |
128 | { |
9a30e26b |
129 | if (!strcmp(name, "LogFileName")) |
962468d4 |
130 | return filename_from_str("putty.log"); |
9a30e26b |
131 | else |
962468d4 |
132 | return filename_from_str(""); |
9a30e26b |
133 | } |
134 | |
c85623f9 |
135 | char *x_get_default(const char *key) |
c5e438ec |
136 | { |
137 | return NULL; /* this is a stub */ |
138 | } |
139 | int term_ldisc(Terminal *term, int mode) |
140 | { |
141 | return FALSE; |
142 | } |
143 | void ldisc_update(void *frontend, int echo, int edit) |
144 | { |
145 | /* Update stdin read mode to reflect changes in line discipline. */ |
146 | struct termios mode; |
147 | |
c6ccd5c2 |
148 | if (!local_tty) return; |
149 | |
c5e438ec |
150 | mode = orig_termios; |
151 | |
152 | if (echo) |
153 | mode.c_lflag |= ECHO; |
154 | else |
155 | mode.c_lflag &= ~ECHO; |
156 | |
8cdf0e5f |
157 | if (edit) { |
158 | mode.c_iflag |= ICRNL; |
c5e438ec |
159 | mode.c_lflag |= ISIG | ICANON; |
e8269d30 |
160 | mode.c_oflag |= OPOST; |
8cdf0e5f |
161 | } else { |
162 | mode.c_iflag &= ~ICRNL; |
c5e438ec |
163 | mode.c_lflag &= ~(ISIG | ICANON); |
e8269d30 |
164 | mode.c_oflag &= ~OPOST; |
c6ccd5c2 |
165 | /* Solaris sets these to unhelpful values */ |
259d0428 |
166 | mode.c_cc[VMIN] = 1; |
167 | mode.c_cc[VTIME] = 0; |
c6ccd5c2 |
168 | /* FIXME: perhaps what we do with IXON/IXOFF should be an |
169 | * argument to ldisc_update(), to allow implementation of SSH-2 |
170 | * "xon-xoff" and Rlogin's equivalent? */ |
171 | mode.c_iflag &= ~IXON; |
172 | mode.c_iflag &= ~IXOFF; |
8cdf0e5f |
173 | } |
d0cb8c0c |
174 | /* |
175 | * Mark parity errors and (more important) BREAK on input. This |
176 | * is more complex than it need be because POSIX-2001 suggests |
177 | * that escaping of valid 0xff in the input stream is dependent on |
178 | * IGNPAR being clear even though marking of BREAK isn't. NetBSD |
179 | * 2.0 goes one worse and makes it dependent on INPCK too. We |
180 | * deal with this by forcing these flags into a useful state and |
181 | * then faking the state in which we found them in from_tty() if |
182 | * we get passed a parity or framing error. |
183 | */ |
184 | mode.c_iflag = (mode.c_iflag | INPCK | PARMRK) & ~IGNPAR; |
c5e438ec |
185 | |
21226fd7 |
186 | tcsetattr(STDIN_FILENO, TCSANOW, &mode); |
c5e438ec |
187 | } |
188 | |
c6ccd5c2 |
189 | /* Helper function to extract a special character from a termios. */ |
190 | static char *get_ttychar(struct termios *t, int index) |
191 | { |
192 | cc_t c = t->c_cc[index]; |
193 | #if defined(_POSIX_VDISABLE) |
194 | if (c == _POSIX_VDISABLE) |
195 | return dupprintf(""); |
196 | #endif |
197 | return dupprintf("^<%d>", c); |
198 | } |
199 | |
200 | char *get_ttymode(void *frontend, const char *mode) |
201 | { |
202 | /* |
203 | * Propagate appropriate terminal modes from the local terminal, |
204 | * if any. |
205 | */ |
206 | if (!local_tty) return NULL; |
207 | |
208 | #define GET_CHAR(ourname, uxname) \ |
209 | do { \ |
210 | if (strcmp(mode, ourname) == 0) \ |
211 | return get_ttychar(&orig_termios, uxname); \ |
212 | } while(0) |
213 | #define GET_BOOL(ourname, uxname, uxmemb, transform) \ |
214 | do { \ |
215 | if (strcmp(mode, ourname) == 0) { \ |
216 | int b = (orig_termios.uxmemb & uxname) != 0; \ |
217 | transform; \ |
218 | return dupprintf("%d", b); \ |
219 | } \ |
220 | } while (0) |
221 | |
222 | /* |
223 | * Modes that want to be the same on all terminal devices involved. |
224 | */ |
225 | /* All the special characters supported by SSH */ |
226 | #if defined(VINTR) |
227 | GET_CHAR("INTR", VINTR); |
228 | #endif |
229 | #if defined(VQUIT) |
230 | GET_CHAR("QUIT", VQUIT); |
231 | #endif |
232 | #if defined(VERASE) |
233 | GET_CHAR("ERASE", VERASE); |
234 | #endif |
235 | #if defined(VKILL) |
236 | GET_CHAR("KILL", VKILL); |
237 | #endif |
238 | #if defined(VEOF) |
239 | GET_CHAR("EOF", VEOF); |
240 | #endif |
241 | #if defined(VEOL) |
242 | GET_CHAR("EOL", VEOL); |
243 | #endif |
244 | #if defined(VEOL2) |
245 | GET_CHAR("EOL2", VEOL2); |
246 | #endif |
247 | #if defined(VSTART) |
248 | GET_CHAR("START", VSTART); |
249 | #endif |
250 | #if defined(VSTOP) |
251 | GET_CHAR("STOP", VSTOP); |
252 | #endif |
253 | #if defined(VSUSP) |
254 | GET_CHAR("SUSP", VSUSP); |
255 | #endif |
256 | #if defined(VDSUSP) |
257 | GET_CHAR("DSUSP", VDSUSP); |
258 | #endif |
259 | #if defined(VREPRINT) |
260 | GET_CHAR("REPRINT", VREPRINT); |
261 | #endif |
262 | #if defined(VWERASE) |
263 | GET_CHAR("WERASE", VWERASE); |
264 | #endif |
265 | #if defined(VLNEXT) |
266 | GET_CHAR("LNEXT", VLNEXT); |
267 | #endif |
268 | #if defined(VFLUSH) |
269 | GET_CHAR("FLUSH", VFLUSH); |
270 | #endif |
271 | #if defined(VSWTCH) |
272 | GET_CHAR("SWTCH", VSWTCH); |
273 | #endif |
274 | #if defined(VSTATUS) |
275 | GET_CHAR("STATUS", VSTATUS); |
276 | #endif |
277 | #if defined(VDISCARD) |
278 | GET_CHAR("DISCARD", VDISCARD); |
279 | #endif |
280 | /* Modes that "configure" other major modes. These should probably be |
281 | * considered as user preferences. */ |
282 | /* Configuration of ICANON */ |
283 | #if defined(ECHOK) |
284 | GET_BOOL("ECHOK", ECHOK, c_lflag, ); |
285 | #endif |
286 | #if defined(ECHOKE) |
287 | GET_BOOL("ECHOKE", ECHOKE, c_lflag, ); |
288 | #endif |
289 | #if defined(ECHOE) |
290 | GET_BOOL("ECHOE", ECHOE, c_lflag, ); |
291 | #endif |
292 | #if defined(ECHONL) |
293 | GET_BOOL("ECHONL", ECHONL, c_lflag, ); |
294 | #endif |
295 | #if defined(XCASE) |
296 | GET_BOOL("XCASE", XCASE, c_lflag, ); |
297 | #endif |
298 | /* Configuration of ECHO */ |
299 | #if defined(ECHOCTL) |
300 | GET_BOOL("ECHOCTL", ECHOCTL, c_lflag, ); |
301 | #endif |
302 | /* Configuration of IXON/IXOFF */ |
303 | #if defined(IXANY) |
304 | GET_BOOL("IXANY", IXANY, c_iflag, ); |
305 | #endif |
e8269d30 |
306 | /* Configuration of OPOST */ |
7016cde4 |
307 | #if defined(OLCUC) |
308 | GET_BOOL("OLCUC", OLCUC, c_oflag, ); |
309 | #endif |
e8269d30 |
310 | #if defined(ONLCR) |
311 | GET_BOOL("ONLCR", ONLCR, c_oflag, ); |
312 | #endif |
313 | #if defined(OCRNL) |
314 | GET_BOOL("OCRNL", OCRNL, c_oflag, ); |
315 | #endif |
316 | #if defined(ONOCR) |
317 | GET_BOOL("ONOCR", ONOCR, c_oflag, ); |
318 | #endif |
20923089 |
319 | #if defined(ONLRET) |
e8269d30 |
320 | GET_BOOL("ONLRET", ONLRET, c_oflag, ); |
321 | #endif |
c6ccd5c2 |
322 | |
323 | /* |
324 | * Modes that want to be set in only one place, and that we have |
325 | * squashed locally. |
326 | */ |
327 | #if defined(ISIG) |
328 | GET_BOOL("ISIG", ISIG, c_lflag, ); |
329 | #endif |
330 | #if defined(ICANON) |
331 | GET_BOOL("ICANON", ICANON, c_lflag, ); |
332 | #endif |
333 | #if defined(ECHO) |
334 | GET_BOOL("ECHO", ECHO, c_lflag, ); |
335 | #endif |
336 | #if defined(IXON) |
337 | GET_BOOL("IXON", IXON, c_iflag, ); |
338 | #endif |
339 | #if defined(IXOFF) |
340 | GET_BOOL("IXOFF", IXOFF, c_iflag, ); |
341 | #endif |
e8269d30 |
342 | #if defined(OPOST) |
343 | GET_BOOL("OPOST", OPOST, c_oflag, ); |
344 | #endif |
c6ccd5c2 |
345 | |
346 | /* |
347 | * We do not propagate the following modes: |
348 | * - Parity/serial settings, which are a local affair and don't |
349 | * make sense propagated over SSH's 8-bit byte-stream. |
350 | * IGNPAR PARMRK INPCK CS7 CS8 PARENB PARODD |
351 | * - Things that want to be enabled in one place that we don't |
352 | * squash locally. |
7016cde4 |
353 | * IUCLC |
c6ccd5c2 |
354 | * - Status bits. |
355 | * PENDIN |
356 | * - Things I don't know what to do with. (FIXME) |
e8269d30 |
357 | * ISTRIP IMAXBEL NOFLSH TOSTOP IEXTEN |
358 | * INLCR IGNCR ICRNL |
c6ccd5c2 |
359 | */ |
360 | |
361 | #undef GET_CHAR |
362 | #undef GET_BOOL |
363 | |
364 | /* Fall through to here for unrecognised names, or ones that are |
365 | * unsupported on this platform */ |
366 | return NULL; |
367 | } |
368 | |
c5e438ec |
369 | void cleanup_termios(void) |
370 | { |
c6ccd5c2 |
371 | if (local_tty) |
21226fd7 |
372 | tcsetattr(STDIN_FILENO, TCSANOW, &orig_termios); |
c5e438ec |
373 | } |
374 | |
375 | bufchain stdout_data, stderr_data; |
bc06669b |
376 | enum { EOF_NO, EOF_PENDING, EOF_SENT } outgoingeof; |
c5e438ec |
377 | |
885f465f |
378 | int try_output(int is_stderr) |
c5e438ec |
379 | { |
380 | bufchain *chain = (is_stderr ? &stderr_data : &stdout_data); |
21226fd7 |
381 | int fd = (is_stderr ? STDERR_FILENO : STDOUT_FILENO); |
c5e438ec |
382 | void *senddata; |
7c28d8d6 |
383 | int sendlen, ret, fl; |
c5e438ec |
384 | |
bc06669b |
385 | if (bufchain_size(chain) > 0) { |
386 | fl = fcntl(fd, F_GETFL); |
387 | if (fl != -1 && !(fl & O_NONBLOCK)) |
388 | fcntl(fd, F_SETFL, fl | O_NONBLOCK); |
389 | do { |
390 | bufchain_prefix(chain, &senddata, &sendlen); |
391 | ret = write(fd, senddata, sendlen); |
392 | if (ret > 0) |
393 | bufchain_consume(chain, ret); |
394 | } while (ret == sendlen && bufchain_size(chain) != 0); |
395 | if (fl != -1 && !(fl & O_NONBLOCK)) |
396 | fcntl(fd, F_SETFL, fl); |
397 | if (ret < 0 && errno != EAGAIN) { |
398 | perror(is_stderr ? "stderr: write" : "stdout: write"); |
399 | exit(1); |
400 | } |
401 | } |
402 | if (outgoingeof == EOF_PENDING && bufchain_size(&stdout_data) == 0) { |
403 | close(STDOUT_FILENO); |
404 | outgoingeof = EOF_SENT; |
c5e438ec |
405 | } |
885f465f |
406 | return bufchain_size(&stdout_data) + bufchain_size(&stderr_data); |
c5e438ec |
407 | } |
408 | |
9fab77dc |
409 | int from_backend(void *frontend_handle, int is_stderr, |
410 | const char *data, int len) |
c5e438ec |
411 | { |
c5e438ec |
412 | if (is_stderr) { |
413 | bufchain_add(&stderr_data, data, len); |
885f465f |
414 | return try_output(TRUE); |
c5e438ec |
415 | } else { |
bc06669b |
416 | assert(outgoingeof == EOF_NO); |
c5e438ec |
417 | bufchain_add(&stdout_data, data, len); |
885f465f |
418 | return try_output(FALSE); |
c5e438ec |
419 | } |
c5e438ec |
420 | } |
421 | |
edd0cb8a |
422 | int from_backend_untrusted(void *frontend_handle, const char *data, int len) |
423 | { |
424 | /* |
425 | * No "untrusted" output should get here (the way the code is |
426 | * currently, it's all diverted by FLAG_STDERR). |
427 | */ |
428 | assert(!"Unexpected call to from_backend_untrusted()"); |
429 | return 0; /* not reached */ |
430 | } |
431 | |
bc06669b |
432 | int from_backend_eof(void *frontend_handle) |
433 | { |
434 | assert(outgoingeof == EOF_NO); |
435 | outgoingeof = EOF_PENDING; |
436 | try_output(FALSE); |
437 | return FALSE; /* do not respond to incoming EOF with outgoing */ |
438 | } |
439 | |
edd0cb8a |
440 | int get_userpass_input(prompts_t *p, unsigned char *in, int inlen) |
441 | { |
442 | int ret; |
443 | ret = cmdline_get_passwd_input(p, in, inlen); |
444 | if (ret == -1) |
445 | ret = console_get_userpass_input(p, in, inlen); |
446 | return ret; |
447 | } |
448 | |
d0cb8c0c |
449 | /* |
450 | * Handle data from a local tty in PARMRK format. |
451 | */ |
deb0e1cf |
452 | static void from_tty(void *vbuf, unsigned len) |
d0cb8c0c |
453 | { |
deb0e1cf |
454 | char *p, *q, *end, *buf = vbuf; |
d0cb8c0c |
455 | static enum {NORMAL, FF, FF00} state = NORMAL; |
456 | |
457 | p = buf; end = buf + len; |
458 | while (p < end) { |
459 | switch (state) { |
460 | case NORMAL: |
461 | if (*p == '\xff') { |
462 | p++; |
463 | state = FF; |
464 | } else { |
465 | q = memchr(p, '\xff', end - p); |
466 | if (q == NULL) q = end; |
467 | back->send(backhandle, p, q - p); |
468 | p = q; |
469 | } |
470 | break; |
471 | case FF: |
472 | if (*p == '\xff') { |
473 | back->send(backhandle, p, 1); |
474 | p++; |
475 | state = NORMAL; |
476 | } else if (*p == '\0') { |
477 | p++; |
478 | state = FF00; |
479 | } else abort(); |
480 | break; |
481 | case FF00: |
482 | if (*p == '\0') { |
483 | back->special(backhandle, TS_BRK); |
484 | } else { |
485 | /* |
486 | * Pretend that PARMRK wasn't set. This involves |
487 | * faking what INPCK and IGNPAR would have done if |
488 | * we hadn't overridden them. Unfortunately, we |
489 | * can't do this entirely correctly because INPCK |
490 | * distinguishes between framing and parity |
491 | * errors, but PARMRK format represents both in |
492 | * the same way. We assume that parity errors are |
493 | * more common than framing errors, and hence |
494 | * treat all input errors as being subject to |
495 | * INPCK. |
496 | */ |
497 | if (orig_termios.c_iflag & INPCK) { |
498 | /* If IGNPAR is set, we throw away the character. */ |
499 | if (!(orig_termios.c_iflag & IGNPAR)) { |
500 | /* PE/FE get passed on as NUL. */ |
501 | *p = 0; |
502 | back->send(backhandle, p, 1); |
503 | } |
504 | } else { |
505 | /* INPCK not set. Assume we got a parity error. */ |
506 | back->send(backhandle, p, 1); |
507 | } |
508 | } |
509 | p++; |
510 | state = NORMAL; |
511 | } |
512 | } |
513 | } |
514 | |
5673d44e |
515 | int signalpipe[2]; |
516 | |
517 | void sigwinch(int signum) |
518 | { |
ecb25722 |
519 | if (write(signalpipe[1], "x", 1) <= 0) |
520 | /* not much we can do about it */; |
5673d44e |
521 | } |
522 | |
c5e438ec |
523 | /* |
74aca06d |
524 | * In Plink our selects are synchronous, so these functions are |
525 | * empty stubs. |
526 | */ |
527 | int uxsel_input_add(int fd, int rwx) { return 0; } |
528 | void uxsel_input_remove(int id) { } |
529 | |
530 | /* |
c5e438ec |
531 | * Short description of parameters. |
532 | */ |
533 | static void usage(void) |
534 | { |
535 | printf("PuTTY Link: command-line connection utility\n"); |
536 | printf("%s\n", ver); |
537 | printf("Usage: plink [options] [user@]host [command]\n"); |
538 | printf(" (\"host\" can also be a PuTTY saved session name)\n"); |
539 | printf("Options:\n"); |
2285d016 |
540 | printf(" -V print version information and exit\n"); |
541 | printf(" -pgpfp print PGP key fingerprints and exit\n"); |
c5e438ec |
542 | printf(" -v show verbose messages\n"); |
543 | printf(" -load sessname Load settings from saved session\n"); |
f41f07bc |
544 | printf(" -ssh -telnet -rlogin -raw -serial\n"); |
afd4d0d2 |
545 | printf(" force use of a particular protocol\n"); |
c5e438ec |
546 | printf(" -P port connect to specified port\n"); |
547 | printf(" -l user connect with specified username\n"); |
c5e438ec |
548 | printf(" -batch disable all interactive prompts\n"); |
549 | printf("The following options only apply to SSH connections:\n"); |
550 | printf(" -pw passw login with specified password\n"); |
dbe6c525 |
551 | printf(" -D [listen-IP:]listen-port\n"); |
552 | printf(" Dynamic SOCKS-based port forwarding\n"); |
553 | printf(" -L [listen-IP:]listen-port:host:port\n"); |
554 | printf(" Forward local port to remote address\n"); |
555 | printf(" -R [listen-IP:]listen-port:host:port\n"); |
556 | printf(" Forward remote port to local address\n"); |
c5e438ec |
557 | printf(" -X -x enable / disable X11 forwarding\n"); |
558 | printf(" -A -a enable / disable agent forwarding\n"); |
559 | printf(" -t -T enable / disable pty allocation\n"); |
560 | printf(" -1 -2 force use of particular protocol version\n"); |
05581745 |
561 | printf(" -4 -6 force use of IPv4 or IPv6\n"); |
c5e438ec |
562 | printf(" -C enable compression\n"); |
563 | printf(" -i key private key file for authentication\n"); |
e5708bc7 |
564 | printf(" -noagent disable use of Pageant\n"); |
565 | printf(" -agent enable use of Pageant\n"); |
54018d95 |
566 | printf(" -m file read remote command(s) from file\n"); |
09bdfcbb |
567 | printf(" -s remote command is an SSH subsystem (SSH-2 only)\n"); |
b72c366d |
568 | printf(" -N don't start a shell/command (SSH-2 only)\n"); |
23828b7e |
569 | printf(" -nc host:port\n"); |
570 | printf(" open tunnel in place of session (SSH-2 only)\n"); |
9621bbab |
571 | printf(" -sercfg configuration-string (e.g. 19200,8,n,1,X)\n"); |
572 | printf(" Specify the serial configuration (serial only)\n"); |
dc108ebc |
573 | exit(1); |
574 | } |
575 | |
576 | static void version(void) |
577 | { |
578 | printf("plink: %s\n", ver); |
c5e438ec |
579 | exit(1); |
580 | } |
581 | |
43a1c4a4 |
582 | void frontend_net_error_pending(void) {} |
583 | |
c5e438ec |
584 | int main(int argc, char **argv) |
585 | { |
586 | int sending; |
587 | int portnumber = -1; |
0ff9ea38 |
588 | int *fdlist; |
589 | int fd; |
590 | int i, fdcount, fdsize, fdstate; |
c5e438ec |
591 | int connopen; |
592 | int exitcode; |
86256dc6 |
593 | int errors; |
09bdfcbb |
594 | int use_subsystem = 0; |
f0f51e90 |
595 | int got_host = FALSE; |
39934deb |
596 | long now; |
679db585 |
597 | struct winsize size; |
c5e438ec |
598 | |
0ff9ea38 |
599 | fdlist = NULL; |
600 | fdcount = fdsize = 0; |
c5e438ec |
601 | /* |
602 | * Initialise port and protocol to sensible defaults. (These |
603 | * will be overridden by more or less anything.) |
604 | */ |
605 | default_protocol = PROT_SSH; |
606 | default_port = 22; |
607 | |
bc06669b |
608 | bufchain_init(&stdout_data); |
609 | bufchain_init(&stderr_data); |
610 | outgoingeof = EOF_NO; |
611 | |
f7397dc6 |
612 | flags = FLAG_STDERR | FLAG_STDERR_TTY; |
613 | |
614 | stderr_tty_init(); |
c5e438ec |
615 | /* |
616 | * Process the command line. |
617 | */ |
4a693cfc |
618 | conf = conf_new(); |
619 | do_defaults(NULL, conf); |
18e62ad8 |
620 | loaded_session = FALSE; |
4a693cfc |
621 | default_protocol = conf_get_int(conf, CONF_protocol); |
622 | default_port = conf_get_int(conf, CONF_port); |
86256dc6 |
623 | errors = 0; |
c5e438ec |
624 | { |
625 | /* |
626 | * Override the default protocol if PLINK_PROTOCOL is set. |
627 | */ |
628 | char *p = getenv("PLINK_PROTOCOL"); |
c5e438ec |
629 | if (p) { |
9e164d82 |
630 | const Backend *b = backend_from_name(p); |
631 | if (b) { |
4a693cfc |
632 | default_protocol = b->protocol; |
633 | default_port = b->default_port; |
634 | conf_set_int(conf, CONF_protocol, default_protocol); |
635 | conf_set_int(conf, CONF_port, default_port); |
c5e438ec |
636 | } |
637 | } |
638 | } |
639 | while (--argc) { |
640 | char *p = *++argv; |
641 | if (*p == '-') { |
9b41d3a8 |
642 | int ret = cmdline_process_param(p, (argc > 1 ? argv[1] : NULL), |
4a693cfc |
643 | 1, conf); |
c5e438ec |
644 | if (ret == -2) { |
645 | fprintf(stderr, |
646 | "plink: option \"%s\" requires an argument\n", p); |
86256dc6 |
647 | errors = 1; |
c5e438ec |
648 | } else if (ret == 2) { |
649 | --argc, ++argv; |
650 | } else if (ret == 1) { |
651 | continue; |
652 | } else if (!strcmp(p, "-batch")) { |
653 | console_batch_mode = 1; |
09bdfcbb |
654 | } else if (!strcmp(p, "-s")) { |
4a693cfc |
655 | /* Save status to write to conf later. */ |
09bdfcbb |
656 | use_subsystem = 1; |
dc108ebc |
657 | } else if (!strcmp(p, "-V")) { |
658 | version(); |
2285d016 |
659 | } else if (!strcmp(p, "-pgpfp")) { |
660 | pgp_fingerprints(); |
661 | exit(1); |
a0e5ed33 |
662 | } else if (!strcmp(p, "-o")) { |
86256dc6 |
663 | if (argc <= 1) { |
a0e5ed33 |
664 | fprintf(stderr, |
665 | "plink: option \"-o\" requires an argument\n"); |
86256dc6 |
666 | errors = 1; |
667 | } else { |
668 | --argc; |
669 | provide_xrm_string(*++argv); |
670 | } |
671 | } else { |
672 | fprintf(stderr, "plink: unknown option \"%s\"\n", p); |
673 | errors = 1; |
c5e438ec |
674 | } |
675 | } else if (*p) { |
4a693cfc |
676 | if (!conf_launchable(conf) || !(got_host || loaded_session)) { |
c5e438ec |
677 | char *q = p; |
a0e5ed33 |
678 | |
c5e438ec |
679 | /* |
680 | * If the hostname starts with "telnet:", set the |
681 | * protocol to Telnet and process the string as a |
682 | * Telnet URL. |
683 | */ |
684 | if (!strncmp(q, "telnet:", 7)) { |
685 | char c; |
686 | |
687 | q += 7; |
688 | if (q[0] == '/' && q[1] == '/') |
689 | q += 2; |
4a693cfc |
690 | conf_set_int(conf, CONF_protocol, PROT_TELNET); |
c5e438ec |
691 | p = q; |
692 | while (*p && *p != ':' && *p != '/') |
693 | p++; |
694 | c = *p; |
695 | if (*p) |
696 | *p++ = '\0'; |
697 | if (c == ':') |
4a693cfc |
698 | conf_set_int(conf, CONF_port, atoi(p)); |
c5e438ec |
699 | else |
4a693cfc |
700 | conf_set_int(conf, CONF_port, -1); |
701 | conf_set_str(conf, CONF_host, q); |
f0f51e90 |
702 | got_host = TRUE; |
c5e438ec |
703 | } else { |
3608528b |
704 | char *r, *user, *host; |
c5e438ec |
705 | /* |
706 | * Before we process the [user@]host string, we |
707 | * first check for the presence of a protocol |
708 | * prefix (a protocol name followed by ","). |
709 | */ |
710 | r = strchr(p, ','); |
711 | if (r) { |
9e164d82 |
712 | const Backend *b; |
713 | *r = '\0'; |
714 | b = backend_from_name(p); |
715 | if (b) { |
4a693cfc |
716 | default_protocol = b->protocol; |
717 | conf_set_int(conf, CONF_protocol, |
718 | default_protocol); |
9e164d82 |
719 | portnumber = b->default_port; |
c5e438ec |
720 | } |
9e164d82 |
721 | p = r + 1; |
c5e438ec |
722 | } |
723 | |
724 | /* |
3608528b |
725 | * A nonzero length string followed by an @ is treated |
726 | * as a username. (We discount an _initial_ @.) The |
727 | * rest of the string (or the whole string if no @) |
728 | * is treated as a session name and/or hostname. |
c5e438ec |
729 | */ |
730 | r = strrchr(p, '@'); |
731 | if (r == p) |
732 | p++, r = NULL; /* discount initial @ */ |
3608528b |
733 | if (r) { |
734 | *r++ = '\0'; |
735 | user = p, host = r; |
736 | } else { |
737 | user = NULL, host = p; |
738 | } |
739 | |
740 | /* |
741 | * Now attempt to load a saved session with the |
742 | * same name as the hostname. |
743 | */ |
744 | { |
4a693cfc |
745 | Conf *conf2 = conf_new(); |
746 | do_defaults(host, conf2); |
747 | if (loaded_session || !conf_launchable(conf2)) { |
c5e438ec |
748 | /* No settings for this host; use defaults */ |
18e62ad8 |
749 | /* (or session was already loaded with -load) */ |
4a693cfc |
750 | conf_set_str(conf, CONF_host, host); |
751 | conf_set_int(conf, CONF_port, default_port); |
f0f51e90 |
752 | got_host = TRUE; |
c5e438ec |
753 | } else { |
4a693cfc |
754 | conf_copy_into(conf, conf2); |
f0f51e90 |
755 | loaded_session = TRUE; |
c5e438ec |
756 | } |
4a693cfc |
757 | conf_free(conf2); |
3608528b |
758 | } |
759 | |
760 | if (user) { |
761 | /* Patch in specified username. */ |
4a693cfc |
762 | conf_set_str(conf, CONF_username, user); |
c5e438ec |
763 | } |
3608528b |
764 | |
c5e438ec |
765 | } |
766 | } else { |
767 | char *command; |
768 | int cmdlen, cmdsize; |
769 | cmdlen = cmdsize = 0; |
770 | command = NULL; |
771 | |
772 | while (argc) { |
773 | while (*p) { |
774 | if (cmdlen >= cmdsize) { |
775 | cmdsize = cmdlen + 512; |
3d88e64d |
776 | command = sresize(command, cmdsize, char); |
c5e438ec |
777 | } |
778 | command[cmdlen++]=*p++; |
779 | } |
780 | if (cmdlen >= cmdsize) { |
781 | cmdsize = cmdlen + 512; |
3d88e64d |
782 | command = sresize(command, cmdsize, char); |
c5e438ec |
783 | } |
784 | command[cmdlen++]=' '; /* always add trailing space */ |
785 | if (--argc) p = *++argv; |
786 | } |
787 | if (cmdlen) command[--cmdlen]='\0'; |
788 | /* change trailing blank to NUL */ |
4a693cfc |
789 | conf_set_str(conf, CONF_remote_cmd, command); |
790 | conf_set_str(conf, CONF_remote_cmd2, ""); |
791 | conf_set_int(conf, CONF_nopty, TRUE); /* command => no tty */ |
c5e438ec |
792 | |
793 | break; /* done with cmdline */ |
794 | } |
795 | } |
796 | } |
797 | |
86256dc6 |
798 | if (errors) |
799 | return 1; |
800 | |
4a693cfc |
801 | if (!conf_launchable(conf) || !(got_host || loaded_session)) { |
c5e438ec |
802 | usage(); |
803 | } |
804 | |
805 | /* |
4a693cfc |
806 | * Muck about with the hostname in various ways. |
c5e438ec |
807 | */ |
808 | { |
4a693cfc |
809 | char *hostbuf = dupstr(conf_get_str(conf, CONF_host)); |
810 | char *host = hostbuf; |
811 | char *p, *q; |
812 | |
813 | /* |
814 | * Trim leading whitespace. |
815 | */ |
816 | host += strspn(host, " \t"); |
c5e438ec |
817 | |
4a693cfc |
818 | /* |
819 | * See if host is of the form user@host, and separate out |
820 | * the username if so. |
821 | */ |
822 | if (host[0] != '\0') { |
823 | char *atsign = strrchr(host, '@'); |
824 | if (atsign) { |
825 | *atsign = '\0'; |
826 | conf_set_str(conf, CONF_username, host); |
827 | host = atsign + 1; |
c5e438ec |
828 | } |
c5e438ec |
829 | } |
4a693cfc |
830 | |
831 | /* |
832 | * Trim off a colon suffix if it's there. |
833 | */ |
834 | host[strcspn(host, ":")] = '\0'; |
835 | |
836 | /* |
837 | * Remove any remaining whitespace. |
838 | */ |
839 | p = hostbuf; |
840 | q = host; |
841 | while (*q) { |
842 | if (*q != ' ' && *q != '\t') |
843 | *p++ = *q; |
844 | q++; |
845 | } |
846 | *p = '\0'; |
847 | |
848 | conf_set_str(conf, CONF_host, hostbuf); |
849 | sfree(hostbuf); |
c5e438ec |
850 | } |
851 | |
852 | /* |
853 | * Perform command-line overrides on session configuration. |
854 | */ |
4a693cfc |
855 | cmdline_run_saved(conf); |
c5e438ec |
856 | |
857 | /* |
09bdfcbb |
858 | * Apply subsystem status. |
859 | */ |
860 | if (use_subsystem) |
4a693cfc |
861 | conf_set_int(conf, CONF_ssh_subsys, TRUE); |
c5e438ec |
862 | |
4a693cfc |
863 | if (!*conf_get_str(conf, CONF_remote_cmd) && |
864 | !*conf_get_str(conf, CONF_remote_cmd2) && |
865 | !*conf_get_str(conf, CONF_ssh_nc_host)) |
c5e438ec |
866 | flags |= FLAG_INTERACTIVE; |
867 | |
868 | /* |
869 | * Select protocol. This is farmed out into a table in a |
870 | * separate file to enable an ssh-free variant. |
871 | */ |
4a693cfc |
872 | back = backend_from_proto(conf_get_int(conf, CONF_protocol)); |
9e164d82 |
873 | if (back == NULL) { |
874 | fprintf(stderr, |
875 | "Internal fault: Unsupported protocol found\n"); |
876 | return 1; |
c5e438ec |
877 | } |
878 | |
879 | /* |
880 | * Select port. |
881 | */ |
882 | if (portnumber != -1) |
4a693cfc |
883 | conf_set_int(conf, CONF_port, portnumber); |
c5e438ec |
884 | |
5673d44e |
885 | /* |
1f39cbd0 |
886 | * Block SIGPIPE, so that we'll get EPIPE individually on |
887 | * particular network connections that go wrong. |
888 | */ |
889 | putty_signal(SIGPIPE, SIG_IGN); |
890 | |
891 | /* |
5673d44e |
892 | * Set up the pipe we'll use to tell us about SIGWINCH. |
893 | */ |
894 | if (pipe(signalpipe) < 0) { |
895 | perror("pipe"); |
896 | exit(1); |
897 | } |
898 | putty_signal(SIGWINCH, sigwinch); |
899 | |
679db585 |
900 | /* |
901 | * Now that we've got the SIGWINCH handler installed, try to find |
902 | * out the initial terminal size. |
903 | */ |
904 | if (ioctl(STDIN_FILENO, TIOCGWINSZ, &size) >= 0) { |
905 | conf_set_int(conf, CONF_width, size.ws_col); |
906 | conf_set_int(conf, CONF_height, size.ws_row); |
907 | } |
908 | |
c5e438ec |
909 | sk_init(); |
0ff9ea38 |
910 | uxsel_init(); |
c5e438ec |
911 | |
912 | /* |
61f62bb3 |
913 | * Unix Plink doesn't provide any way to add forwardings after the |
914 | * connection is set up, so if there are none now, we can safely set |
915 | * the "simple" flag. |
916 | */ |
4a693cfc |
917 | if (conf_get_int(conf, CONF_protocol) == PROT_SSH && |
918 | !conf_get_int(conf, CONF_x11_forward) && |
919 | !conf_get_int(conf, CONF_agentfwd) && |
920 | !conf_get_str_nthstrkey(conf, CONF_portfwd, 0)) |
921 | conf_set_int(conf, CONF_ssh_simple, TRUE); |
922 | |
61f62bb3 |
923 | /* |
c5e438ec |
924 | * Start up the connection. |
925 | */ |
4a693cfc |
926 | logctx = log_init(NULL, conf); |
b51259f6 |
927 | console_provide_logctx(logctx); |
c5e438ec |
928 | { |
cbe2d68f |
929 | const char *error; |
c5e438ec |
930 | char *realhost; |
931 | /* nodelay is only useful if stdin is a terminal device */ |
4a693cfc |
932 | int nodelay = conf_get_int(conf, CONF_tcp_nodelay) && isatty(0); |
c5e438ec |
933 | |
4a693cfc |
934 | error = back->init(NULL, &backhandle, conf, |
935 | conf_get_str(conf, CONF_host), |
936 | conf_get_int(conf, CONF_port), |
937 | &realhost, nodelay, |
938 | conf_get_int(conf, CONF_tcp_keepalives)); |
c5e438ec |
939 | if (error) { |
984992ef |
940 | fprintf(stderr, "Unable to open connection:\n%s\n", error); |
c5e438ec |
941 | return 1; |
942 | } |
c5e438ec |
943 | back->provide_logctx(backhandle, logctx); |
4a693cfc |
944 | ldisc_create(conf, NULL, back, backhandle, NULL); |
c5e438ec |
945 | sfree(realhost); |
946 | } |
947 | connopen = 1; |
948 | |
949 | /* |
950 | * Set up the initial console mode. We don't care if this call |
951 | * fails, because we know we aren't necessarily running in a |
952 | * console. |
953 | */ |
21226fd7 |
954 | local_tty = (tcgetattr(STDIN_FILENO, &orig_termios) == 0); |
c5e438ec |
955 | atexit(cleanup_termios); |
956 | ldisc_update(NULL, 1, 1); |
957 | sending = FALSE; |
39934deb |
958 | now = GETTICKCOUNT(); |
c5e438ec |
959 | |
960 | while (1) { |
961 | fd_set rset, wset, xset; |
962 | int maxfd; |
963 | int rwx; |
964 | int ret; |
965 | |
966 | FD_ZERO(&rset); |
967 | FD_ZERO(&wset); |
968 | FD_ZERO(&xset); |
969 | maxfd = 0; |
970 | |
5673d44e |
971 | FD_SET_MAX(signalpipe[0], maxfd, rset); |
972 | |
c5e438ec |
973 | if (connopen && !sending && |
6226c939 |
974 | back->connected(backhandle) && |
c5e438ec |
975 | back->sendok(backhandle) && |
976 | back->sendbuffer(backhandle) < MAX_STDIN_BACKLOG) { |
977 | /* If we're OK to send, then try to read from stdin. */ |
21226fd7 |
978 | FD_SET_MAX(STDIN_FILENO, maxfd, rset); |
c5e438ec |
979 | } |
980 | |
981 | if (bufchain_size(&stdout_data) > 0) { |
982 | /* If we have data for stdout, try to write to stdout. */ |
21226fd7 |
983 | FD_SET_MAX(STDOUT_FILENO, maxfd, wset); |
c5e438ec |
984 | } |
985 | |
986 | if (bufchain_size(&stderr_data) > 0) { |
987 | /* If we have data for stderr, try to write to stderr. */ |
21226fd7 |
988 | FD_SET_MAX(STDERR_FILENO, maxfd, wset); |
c5e438ec |
989 | } |
990 | |
0ff9ea38 |
991 | /* Count the currently active fds. */ |
c5e438ec |
992 | i = 0; |
0ff9ea38 |
993 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
994 | fd = next_fd(&fdstate, &rwx)) i++; |
c5e438ec |
995 | |
0ff9ea38 |
996 | /* Expand the fdlist buffer if necessary. */ |
997 | if (i > fdsize) { |
998 | fdsize = i + 16; |
999 | fdlist = sresize(fdlist, fdsize, int); |
c5e438ec |
1000 | } |
1001 | |
1002 | /* |
0ff9ea38 |
1003 | * Add all currently open fds to the select sets, and store |
1004 | * them in fdlist as well. |
c5e438ec |
1005 | */ |
0ff9ea38 |
1006 | fdcount = 0; |
1007 | for (fd = first_fd(&fdstate, &rwx); fd >= 0; |
1008 | fd = next_fd(&fdstate, &rwx)) { |
1009 | fdlist[fdcount++] = fd; |
c5e438ec |
1010 | if (rwx & 1) |
0ff9ea38 |
1011 | FD_SET_MAX(fd, maxfd, rset); |
c5e438ec |
1012 | if (rwx & 2) |
0ff9ea38 |
1013 | FD_SET_MAX(fd, maxfd, wset); |
c5e438ec |
1014 | if (rwx & 4) |
0ff9ea38 |
1015 | FD_SET_MAX(fd, maxfd, xset); |
c5e438ec |
1016 | } |
1017 | |
5673d44e |
1018 | do { |
39934deb |
1019 | long next, ticks; |
1020 | struct timeval tv, *ptv; |
1021 | |
1022 | if (run_timers(now, &next)) { |
1023 | ticks = next - GETTICKCOUNT(); |
1024 | if (ticks < 0) ticks = 0; /* just in case */ |
1025 | tv.tv_sec = ticks / 1000; |
1026 | tv.tv_usec = ticks % 1000 * 1000; |
1027 | ptv = &tv; |
1028 | } else { |
1029 | ptv = NULL; |
1030 | } |
1031 | ret = select(maxfd, &rset, &wset, &xset, ptv); |
1032 | if (ret == 0) |
1033 | now = next; |
c2eb6cb7 |
1034 | else |
1035 | now = GETTICKCOUNT(); |
5673d44e |
1036 | } while (ret < 0 && errno == EINTR); |
c5e438ec |
1037 | |
1038 | if (ret < 0) { |
1039 | perror("select"); |
1040 | exit(1); |
1041 | } |
1042 | |
0ff9ea38 |
1043 | for (i = 0; i < fdcount; i++) { |
1044 | fd = fdlist[i]; |
56e5b2db |
1045 | /* |
1046 | * We must process exceptional notifications before |
1047 | * ordinary readability ones, or we may go straight |
1048 | * past the urgent marker. |
1049 | */ |
0ff9ea38 |
1050 | if (FD_ISSET(fd, &xset)) |
1051 | select_result(fd, 4); |
1052 | if (FD_ISSET(fd, &rset)) |
1053 | select_result(fd, 1); |
1054 | if (FD_ISSET(fd, &wset)) |
1055 | select_result(fd, 2); |
c5e438ec |
1056 | } |
1057 | |
5673d44e |
1058 | if (FD_ISSET(signalpipe[0], &rset)) { |
1059 | char c[1]; |
1060 | struct winsize size; |
ecb25722 |
1061 | if (read(signalpipe[0], c, 1) <= 0) |
1062 | /* ignore error */; |
1063 | /* ignore its value; it'll be `x' */ |
679db585 |
1064 | if (ioctl(STDIN_FILENO, TIOCGWINSZ, (void *)&size) >= 0) |
5673d44e |
1065 | back->size(backhandle, size.ws_col, size.ws_row); |
1066 | } |
1067 | |
21226fd7 |
1068 | if (FD_ISSET(STDIN_FILENO, &rset)) { |
c5e438ec |
1069 | char buf[4096]; |
1070 | int ret; |
1071 | |
6226c939 |
1072 | if (connopen && back->connected(backhandle)) { |
21226fd7 |
1073 | ret = read(STDIN_FILENO, buf, sizeof(buf)); |
c5e438ec |
1074 | if (ret < 0) { |
1075 | perror("stdin: read"); |
1076 | exit(1); |
1077 | } else if (ret == 0) { |
1078 | back->special(backhandle, TS_EOF); |
1079 | sending = FALSE; /* send nothing further after this */ |
1080 | } else { |
d0cb8c0c |
1081 | if (local_tty) |
1082 | from_tty(buf, ret); |
1083 | else |
1084 | back->send(backhandle, buf, ret); |
c5e438ec |
1085 | } |
1086 | } |
1087 | } |
1088 | |
21226fd7 |
1089 | if (FD_ISSET(STDOUT_FILENO, &wset)) { |
885f465f |
1090 | back->unthrottle(backhandle, try_output(FALSE)); |
c5e438ec |
1091 | } |
1092 | |
21226fd7 |
1093 | if (FD_ISSET(STDERR_FILENO, &wset)) { |
885f465f |
1094 | back->unthrottle(backhandle, try_output(TRUE)); |
c5e438ec |
1095 | } |
1096 | |
43a1c4a4 |
1097 | net_pending_errors(); |
1098 | |
6226c939 |
1099 | if ((!connopen || !back->connected(backhandle)) && |
c5e438ec |
1100 | bufchain_size(&stdout_data) == 0 && |
1101 | bufchain_size(&stderr_data) == 0) |
1102 | break; /* we closed the connection */ |
1103 | } |
1104 | exitcode = back->exitcode(backhandle); |
1105 | if (exitcode < 0) { |
1106 | fprintf(stderr, "Remote process exit code unavailable\n"); |
1107 | exitcode = 1; /* this is an error condition */ |
1108 | } |
d9c40fd6 |
1109 | cleanup_exit(exitcode); |
1110 | return exitcode; /* shouldn't happen, but placates gcc */ |
c5e438ec |
1111 | } |