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b0a33c1e | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
9afe19d6 | 7 | * Daniel Lezcano <daniel.lezcano at free.fr> |
b0a33c1e | 8 | * |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
250b1eec | 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
b0a33c1e | 22 | */ |
23 | ||
9395937a CB |
24 | #include <errno.h> |
25 | #include <fcntl.h> | |
b5159817 | 26 | #include <signal.h> |
b0a33c1e | 27 | #include <stdio.h> |
e0dc0de7 | 28 | #include <stdlib.h> |
8173e600 | 29 | #include <termios.h> |
9395937a | 30 | #include <unistd.h> |
da41561c CB |
31 | #include <sys/epoll.h> |
32 | #include <sys/types.h> | |
b0a33c1e | 33 | |
948955a2 | 34 | #include <lxc/lxccontainer.h> |
f2363e38 | 35 | |
9395937a CB |
36 | #include "af_unix.h" |
37 | #include "caps.h" | |
38 | #include "commands.h" | |
00dbc43e | 39 | #include "conf.h" |
e827ff7e | 40 | #include "config.h" |
0d4137cc | 41 | #include "console.h" |
9395937a | 42 | #include "log.h" |
b5159817 | 43 | #include "lxclock.h" |
9395937a CB |
44 | #include "mainloop.h" |
45 | #include "start.h" /* for struct lxc_handler */ | |
b5159817 | 46 | #include "utils.h" |
36eb9bde | 47 | |
e827ff7e SG |
48 | #if HAVE_PTY_H |
49 | #include <pty.h> | |
50 | #else | |
51 | #include <../include/openpty.h> | |
52 | #endif | |
53 | ||
732375f5 CB |
54 | #define LXC_CONSOLE_BUFFER_SIZE 1024 |
55 | ||
f36e1654 | 56 | lxc_log_define(console, lxc); |
36eb9bde | 57 | |
b5159817 | 58 | static struct lxc_list lxc_ttys; |
724e753c | 59 | |
b5159817 | 60 | typedef void (*sighandler_t)(int); |
b5159817 | 61 | |
0519b5cc | 62 | __attribute__((constructor)) void lxc_console_init(void) |
b5159817 DE |
63 | { |
64 | lxc_list_init(&lxc_ttys); | |
65 | } | |
724e753c | 66 | |
0d4137cc | 67 | void lxc_console_winsz(int srcfd, int dstfd) |
b5159817 | 68 | { |
0519b5cc | 69 | int ret; |
b5159817 | 70 | struct winsize wsz; |
0519b5cc CB |
71 | |
72 | if (!isatty(srcfd)) | |
73 | return; | |
74 | ||
75 | ret = ioctl(srcfd, TIOCGWINSZ, &wsz); | |
76 | if (ret < 0) { | |
77 | WARN("Failed to get window size"); | |
78 | return; | |
724e753c | 79 | } |
0519b5cc CB |
80 | |
81 | ret = ioctl(dstfd, TIOCSWINSZ, &wsz); | |
82 | if (ret < 0) | |
83 | WARN("Failed to set window size"); | |
84 | else | |
85 | DEBUG("Set window size to %d columns and %d rows", wsz.ws_col, | |
86 | wsz.ws_row); | |
87 | ||
88 | return; | |
b5159817 | 89 | } |
724e753c | 90 | |
b5159817 DE |
91 | static void lxc_console_winch(struct lxc_tty_state *ts) |
92 | { | |
93 | lxc_console_winsz(ts->stdinfd, ts->masterfd); | |
0519b5cc | 94 | |
0d4137cc CB |
95 | if (ts->winch_proxy) |
96 | lxc_cmd_console_winch(ts->winch_proxy, ts->winch_proxy_lxcpath); | |
724e753c MN |
97 | } |
98 | ||
b5159817 | 99 | void lxc_console_sigwinch(int sig) |
cd453b38 | 100 | { |
025ed0f3 SH |
101 | struct lxc_list *it; |
102 | struct lxc_tty_state *ts; | |
cd453b38 | 103 | |
025ed0f3 SH |
104 | lxc_list_for_each(it, &lxc_ttys) { |
105 | ts = it->elem; | |
106 | lxc_console_winch(ts); | |
cd453b38 | 107 | } |
b5159817 | 108 | } |
cd453b38 | 109 | |
0519b5cc CB |
110 | int lxc_console_cb_signal_fd(int fd, uint32_t events, void *cbdata, |
111 | struct lxc_epoll_descr *descr) | |
b5159817 | 112 | { |
1349e92e | 113 | ssize_t ret; |
b5159817 DE |
114 | struct signalfd_siginfo siginfo; |
115 | struct lxc_tty_state *ts = cbdata; | |
116 | ||
1349e92e | 117 | ret = read(fd, &siginfo, sizeof(siginfo)); |
0d4137cc | 118 | if (ret < 0 || (size_t)ret < sizeof(siginfo)) { |
0519b5cc | 119 | ERROR("Failed to read signal info"); |
b5159817 | 120 | return -1; |
cd453b38 DL |
121 | } |
122 | ||
1349e92e CB |
123 | if (siginfo.ssi_signo == SIGTERM) { |
124 | DEBUG("Received SIGTERM. Detaching from the console"); | |
a529bc25 | 125 | return LXC_MAINLOOP_CLOSE; |
1349e92e CB |
126 | } |
127 | ||
128 | if (siginfo.ssi_signo == SIGWINCH) | |
129 | lxc_console_winch(ts); | |
130 | ||
b5159817 DE |
131 | return 0; |
132 | } | |
133 | ||
0519b5cc | 134 | struct lxc_tty_state *lxc_console_signal_init(int srcfd, int dstfd) |
b5159817 | 135 | { |
1349e92e | 136 | int ret; |
0519b5cc | 137 | bool istty; |
b5159817 DE |
138 | sigset_t mask; |
139 | struct lxc_tty_state *ts; | |
140 | ||
141 | ts = malloc(sizeof(*ts)); | |
142 | if (!ts) | |
143 | return NULL; | |
144 | ||
145 | memset(ts, 0, sizeof(*ts)); | |
341c2aed | 146 | ts->stdinfd = srcfd; |
b5159817 | 147 | ts->masterfd = dstfd; |
341c2aed | 148 | ts->sigfd = -1; |
b5159817 | 149 | |
1349e92e CB |
150 | sigemptyset(&mask); |
151 | ||
0519b5cc CB |
152 | istty = isatty(srcfd) == 1; |
153 | if (!istty) { | |
25964232 | 154 | INFO("fd %d does not refer to a tty device", srcfd); |
1349e92e CB |
155 | } else { |
156 | /* Add tty to list to be scanned at SIGWINCH time. */ | |
157 | lxc_list_add_elem(&ts->node, ts); | |
158 | lxc_list_add_tail(&lxc_ttys, &ts->node); | |
159 | sigaddset(&mask, SIGWINCH); | |
25964232 LF |
160 | } |
161 | ||
1349e92e CB |
162 | /* Exit the mainloop cleanly on SIGTERM. */ |
163 | sigaddset(&mask, SIGTERM); | |
b5159817 | 164 | |
1349e92e CB |
165 | ret = sigprocmask(SIG_BLOCK, &mask, &ts->oldmask); |
166 | if (ret < 0) { | |
167 | WARN("Failed to block signals"); | |
168 | goto on_error; | |
b5159817 DE |
169 | } |
170 | ||
dc5f6125 | 171 | ts->sigfd = signalfd(-1, &mask, SFD_CLOEXEC); |
b5159817 | 172 | if (ts->sigfd < 0) { |
1349e92e | 173 | WARN("Failed to create signal fd"); |
341c2aed | 174 | sigprocmask(SIG_SETMASK, &ts->oldmask, NULL); |
1349e92e | 175 | goto on_error; |
b5159817 DE |
176 | } |
177 | ||
1349e92e CB |
178 | DEBUG("Created signal fd %d", ts->sigfd); |
179 | return ts; | |
180 | ||
181 | on_error: | |
182 | ERROR("Failed to create signal fd"); | |
183 | if (ts->sigfd >= 0) { | |
184 | close(ts->sigfd); | |
185 | ts->sigfd = -1; | |
186 | } | |
187 | if (istty) | |
188 | lxc_list_del(&ts->node); | |
b5159817 | 189 | return ts; |
cd453b38 DL |
190 | } |
191 | ||
0519b5cc | 192 | void lxc_console_signal_fini(struct lxc_tty_state *ts) |
63376d7d | 193 | { |
0e6da90b | 194 | if (ts->sigfd >= 0) { |
b5159817 | 195 | close(ts->sigfd); |
1349e92e CB |
196 | |
197 | if (sigprocmask(SIG_SETMASK, &ts->oldmask, NULL) < 0) | |
198 | WARN("%s - Failed to restore signal mask", strerror(errno)); | |
0e6da90b | 199 | } |
0d4137cc | 200 | |
1349e92e CB |
201 | if (isatty(ts->stdinfd)) |
202 | lxc_list_del(&ts->node); | |
203 | ||
b5159817 DE |
204 | free(ts); |
205 | } | |
1560f6c9 | 206 | |
9785b539 | 207 | static int lxc_console_truncate_log_file(struct lxc_pty *console) |
861813e5 CB |
208 | { |
209 | /* be very certain things are kosher */ | |
210 | if (!console->log_path || console->log_fd < 0) | |
211 | return -EBADF; | |
212 | ||
213 | return lxc_unpriv(ftruncate(console->log_fd, 0)); | |
214 | } | |
215 | ||
9785b539 | 216 | static int lxc_console_rotate_log_file(struct lxc_pty *console) |
861813e5 CB |
217 | { |
218 | int ret; | |
219 | size_t len; | |
220 | char *tmp; | |
221 | ||
861813e5 CB |
222 | if (!console->log_path || console->log_rotate == 0) |
223 | return -EOPNOTSUPP; | |
224 | ||
225 | /* be very certain things are kosher */ | |
226 | if (console->log_fd < 0) | |
227 | return -EBADF; | |
228 | ||
229 | len = strlen(console->log_path) + sizeof(".1"); | |
230 | tmp = alloca(len); | |
231 | ||
232 | ret = snprintf(tmp, len, "%s.1", console->log_path); | |
233 | if (ret < 0 || (size_t)ret >= len) | |
234 | return -EFBIG; | |
235 | ||
236 | close(console->log_fd); | |
237 | console->log_fd = -1; | |
238 | ret = lxc_unpriv(rename(console->log_path, tmp)); | |
239 | if (ret < 0) | |
240 | return ret; | |
241 | ||
242 | return lxc_console_create_log_file(console); | |
243 | } | |
244 | ||
9785b539 | 245 | static int lxc_console_write_log_file(struct lxc_pty *console, char *buf, |
861813e5 CB |
246 | int bytes_read) |
247 | { | |
248 | int ret; | |
249 | int64_t space_left = -1; | |
250 | struct stat st; | |
251 | ||
252 | if (console->log_fd < 0) | |
253 | return 0; | |
254 | ||
255 | /* A log size <= 0 means that there's no limit on the size of the log | |
256 | * file at which point we simply ignore whether the log is supposed to | |
257 | * be rotated or not. | |
258 | */ | |
259 | if (console->log_size <= 0) | |
260 | return lxc_write_nointr(console->log_fd, buf, bytes_read); | |
261 | ||
262 | /* Get current size of the log file. */ | |
263 | ret = fstat(console->log_fd, &st); | |
264 | if (ret < 0) { | |
265 | SYSERROR("Failed to stat the console log file descriptor"); | |
266 | return -1; | |
267 | } | |
268 | ||
269 | /* handle non-regular files */ | |
270 | if ((st.st_mode & S_IFMT) != S_IFREG) { | |
271 | /* This isn't a regular file. so rotating the file seems a | |
272 | * dangerous thing to do, size limits are also very | |
273 | * questionable. Let's not risk anything and tell the user that | |
274 | * he's requesting us to do weird stuff. | |
275 | */ | |
276 | if (console->log_rotate > 0 || console->log_size > 0) | |
277 | return -EINVAL; | |
278 | ||
279 | /* I mean, sure log wherever you want to. */ | |
280 | return lxc_write_nointr(console->log_fd, buf, bytes_read); | |
281 | } | |
282 | ||
861813e5 CB |
283 | space_left = console->log_size - st.st_size; |
284 | ||
285 | /* User doesn't want to rotate the log file and there's no more space | |
286 | * left so simply truncate it. | |
287 | */ | |
288 | if (space_left <= 0 && console->log_rotate <= 0) { | |
289 | ret = lxc_console_truncate_log_file(console); | |
290 | if (ret < 0) | |
291 | return ret; | |
292 | ||
293 | if (bytes_read <= console->log_size) | |
294 | return lxc_write_nointr(console->log_fd, buf, bytes_read); | |
295 | ||
296 | /* Write as much as we can into the buffer and loose the rest. */ | |
297 | return lxc_write_nointr(console->log_fd, buf, console->log_size); | |
298 | } | |
299 | ||
300 | /* There's enough space left. */ | |
301 | if (bytes_read <= space_left) | |
302 | return lxc_write_nointr(console->log_fd, buf, bytes_read); | |
303 | ||
304 | /* There's not enough space left but at least write as much as we can | |
305 | * into the old log file. | |
306 | */ | |
307 | ret = lxc_write_nointr(console->log_fd, buf, space_left); | |
308 | if (ret < 0) | |
309 | return -1; | |
310 | ||
311 | /* Calculate how many bytes we still need to write. */ | |
312 | bytes_read -= space_left; | |
313 | ||
89962c6c | 314 | /* There'd be more to write but we aren't instructed to rotate the log |
861813e5 CB |
315 | * file so simply return. There's no error on our side here. |
316 | */ | |
317 | if (console->log_rotate > 0) | |
318 | ret = lxc_console_rotate_log_file(console); | |
319 | else | |
320 | ret = lxc_console_truncate_log_file(console); | |
321 | if (ret < 0) | |
322 | return ret; | |
323 | ||
324 | if (console->log_size < bytes_read) { | |
325 | /* Well, this is unfortunate because it means that there is more | |
326 | * to write than the user has granted us space. There are | |
327 | * multiple ways to handle this but let's use the simplest one: | |
328 | * write as much as we can, tell the user that there was more | |
329 | * stuff to write and move on. | |
330 | * Note that this scenario shouldn't actually happen with the | |
331 | * standard pty-based console that LXC allocates since it will | |
332 | * be switched into raw mode. In raw mode only 1 byte at a time | |
333 | * should be read and written. | |
334 | */ | |
335 | WARN("Size of console log file is smaller than the bytes to write"); | |
336 | ret = lxc_write_nointr(console->log_fd, buf, console->log_size); | |
337 | if (ret < 0) | |
338 | return -1; | |
339 | bytes_read -= ret; | |
340 | return bytes_read; | |
341 | } | |
342 | ||
343 | /* Yay, we made it. */ | |
344 | ret = lxc_write_nointr(console->log_fd, buf, bytes_read); | |
345 | if (ret < 0) | |
346 | return -1; | |
347 | bytes_read -= ret; | |
348 | return bytes_read; | |
349 | } | |
350 | ||
a529bc25 CB |
351 | int lxc_console_cb_con(int fd, uint32_t events, void *data, |
352 | struct lxc_epoll_descr *descr) | |
b5159817 | 353 | { |
9785b539 | 354 | struct lxc_pty *console = data; |
732375f5 CB |
355 | char buf[LXC_CONSOLE_BUFFER_SIZE]; |
356 | int r, w, w_log, w_rbuf; | |
e0dc0de7 | 357 | |
3e6580ec CB |
358 | w = r = lxc_read_nointr(fd, buf, sizeof(buf)); |
359 | if (r <= 0) { | |
732375f5 | 360 | INFO("Console client on fd %d has exited", fd); |
b5159817 | 361 | lxc_mainloop_del_handler(descr, fd); |
c06a0555 CB |
362 | |
363 | if (fd == console->master) { | |
364 | console->master = -EBADF; | |
365 | } else if (fd == console->peer) { | |
0b1e242b | 366 | if (console->tty_state) { |
0519b5cc | 367 | lxc_console_signal_fini(console->tty_state); |
0b1e242b L |
368 | console->tty_state = NULL; |
369 | } | |
c06a0555 CB |
370 | console->peer = -EBADF; |
371 | } else { | |
372 | ERROR("Handler received unexpected file descriptor"); | |
0b1e242b | 373 | } |
b5159817 | 374 | close(fd); |
c06a0555 | 375 | |
a529bc25 | 376 | return LXC_MAINLOOP_CLOSE; |
33fcb7a0 | 377 | } |
63376d7d | 378 | |
b5159817 | 379 | if (fd == console->peer) |
3e6580ec | 380 | w = lxc_write_nointr(console->master, buf, r); |
b5159817 | 381 | |
732375f5 | 382 | w_rbuf = w_log = 0; |
b5159817 | 383 | if (fd == console->master) { |
732375f5 | 384 | /* write to peer first */ |
b5159817 | 385 | if (console->peer >= 0) |
3e6580ec | 386 | w = lxc_write_nointr(console->peer, buf, r); |
732375f5 CB |
387 | |
388 | /* write to console ringbuffer */ | |
28f3b1cd | 389 | if (console->buffer_size > 0) |
732375f5 CB |
390 | w_rbuf = lxc_ringbuf_write(&console->ringbuf, buf, r); |
391 | ||
861813e5 CB |
392 | if (console->log_fd > 0) |
393 | w_log = lxc_console_write_log_file(console, buf, r); | |
394 | ||
63376d7d DL |
395 | } |
396 | ||
b5159817 | 397 | if (w != r) |
732375f5 CB |
398 | WARN("Console short write r:%d != w:%d", r, w); |
399 | ||
400 | if (w_rbuf < 0) | |
401 | TRACE("%s - Failed to write %d bytes to console ringbuffer", | |
402 | strerror(-w_rbuf), r); | |
403 | ||
404 | if (w_log < 0) | |
405 | TRACE("Failed to write %d bytes to console log", r); | |
0d4137cc | 406 | |
b5159817 DE |
407 | return 0; |
408 | } | |
409 | ||
9785b539 | 410 | static int lxc_console_mainloop_add_peer(struct lxc_pty *console) |
b5159817 | 411 | { |
a529bc25 CB |
412 | int ret; |
413 | ||
b5159817 | 414 | if (console->peer >= 0) { |
a529bc25 CB |
415 | ret = lxc_mainloop_add_handler(console->descr, console->peer, |
416 | lxc_console_cb_con, console); | |
417 | if (ret < 0) { | |
0519b5cc | 418 | WARN("Failed to add console peer handler to mainloop"); |
a529bc25 CB |
419 | return -1; |
420 | } | |
63376d7d DL |
421 | } |
422 | ||
a529bc25 CB |
423 | if (!console->tty_state || console->tty_state->sigfd < 0) |
424 | return 0; | |
425 | ||
426 | ret = lxc_mainloop_add_handler(console->descr, console->tty_state->sigfd, | |
427 | lxc_console_cb_signal_fd, console->tty_state); | |
428 | if (ret < 0) { | |
429 | WARN("Failed to add signal handler to mainloop"); | |
430 | return -1; | |
b5159817 | 431 | } |
a529bc25 CB |
432 | |
433 | return 0; | |
b5159817 DE |
434 | } |
435 | ||
30a33fbd | 436 | int lxc_console_mainloop_add(struct lxc_epoll_descr *descr, |
9785b539 | 437 | struct lxc_pty *console) |
b5159817 | 438 | { |
a529bc25 | 439 | int ret; |
b5159817 DE |
440 | |
441 | if (console->master < 0) { | |
442 | INFO("no console"); | |
443 | return 0; | |
596a818d DE |
444 | } |
445 | ||
30a33fbd CB |
446 | ret = lxc_mainloop_add_handler(descr, console->master, |
447 | lxc_console_cb_con, console); | |
448 | if (ret < 0) { | |
449 | ERROR("Failed to add handler for %d to mainloop", console->master); | |
b5159817 | 450 | return -1; |
28a4b0e5 DL |
451 | } |
452 | ||
30a33fbd CB |
453 | /* We cache the descr so that we can add an fd to it when someone |
454 | * does attach to it in lxc_console_allocate(). | |
b5159817 DE |
455 | */ |
456 | console->descr = descr; | |
a529bc25 CB |
457 | ret = lxc_console_mainloop_add_peer(console); |
458 | if (ret < 0) | |
459 | return -1; | |
cd453b38 | 460 | |
b5159817 DE |
461 | return 0; |
462 | } | |
28a4b0e5 | 463 | |
0d4137cc | 464 | int lxc_setup_tios(int fd, struct termios *oldtios) |
b5159817 DE |
465 | { |
466 | struct termios newtios; | |
e0dc0de7 | 467 | |
b5159817 DE |
468 | if (!isatty(fd)) { |
469 | ERROR("'%d' is not a tty", fd); | |
470 | return -1; | |
e0dc0de7 DL |
471 | } |
472 | ||
b5159817 DE |
473 | /* Get current termios */ |
474 | if (tcgetattr(fd, oldtios)) { | |
e0dc0de7 | 475 | SYSERROR("failed to get current terminal settings"); |
b5159817 | 476 | return -1; |
e0dc0de7 DL |
477 | } |
478 | ||
4dc96430 TJ |
479 | /* ensure we don't end up in an endless loop: |
480 | * The kernel might fire SIGTTOU while an | |
481 | * ioctl() in tcsetattr() is executed. When the ioctl() | |
482 | * is resumed and retries, the signal handler interrupts it again. | |
483 | */ | |
484 | signal (SIGTTIN, SIG_IGN); | |
485 | signal (SIGTTOU, SIG_IGN); | |
486 | ||
b5159817 | 487 | newtios = *oldtios; |
e0dc0de7 | 488 | |
a7c97a40 CB |
489 | /* We use the same settings that ssh does. */ |
490 | newtios.c_iflag |= IGNPAR; | |
491 | newtios.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF); | |
492 | #ifdef IUCLC | |
493 | newtios.c_iflag &= ~IUCLC; | |
494 | #endif | |
4dc96430 | 495 | newtios.c_lflag &= ~(TOSTOP | ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL); |
a7c97a40 CB |
496 | #ifdef IEXTEN |
497 | newtios.c_lflag &= ~IEXTEN; | |
498 | #endif | |
d3893399 | 499 | newtios.c_oflag &= ~OPOST; |
b5159817 DE |
500 | newtios.c_cc[VMIN] = 1; |
501 | newtios.c_cc[VTIME] = 0; | |
e0dc0de7 | 502 | |
a7c97a40 | 503 | /* Set new attributes. */ |
b5159817 | 504 | if (tcsetattr(fd, TCSAFLUSH, &newtios)) { |
e0dc0de7 | 505 | ERROR("failed to set new terminal settings"); |
b5159817 | 506 | return -1; |
e0dc0de7 DL |
507 | } |
508 | ||
63376d7d | 509 | return 0; |
b5159817 | 510 | } |
e0dc0de7 | 511 | |
9785b539 | 512 | static void lxc_console_peer_proxy_free(struct lxc_pty *console) |
b5159817 | 513 | { |
0e6da90b | 514 | if (console->tty_state) { |
0519b5cc | 515 | lxc_console_signal_fini(console->tty_state); |
b5159817 DE |
516 | console->tty_state = NULL; |
517 | } | |
518 | close(console->peerpty.master); | |
519 | close(console->peerpty.slave); | |
520 | console->peerpty.master = -1; | |
521 | console->peerpty.slave = -1; | |
522 | console->peerpty.busy = -1; | |
523 | console->peerpty.name[0] = '\0'; | |
596a818d | 524 | console->peer = -1; |
b5159817 | 525 | } |
596a818d | 526 | |
9785b539 | 527 | static int lxc_console_peer_proxy_alloc(struct lxc_pty *console, int sockfd) |
b5159817 DE |
528 | { |
529 | struct termios oldtermio; | |
530 | struct lxc_tty_state *ts; | |
025ed0f3 | 531 | int ret; |
b5159817 DE |
532 | |
533 | if (console->master < 0) { | |
534 | ERROR("console not set up"); | |
535 | return -1; | |
536 | } | |
537 | if (console->peerpty.busy != -1 || console->peer != -1) { | |
538 | NOTICE("console already in use"); | |
539 | return -1; | |
540 | } | |
541 | if (console->tty_state) { | |
542 | ERROR("console already has tty_state"); | |
543 | return -1; | |
596a818d DE |
544 | } |
545 | ||
b5159817 DE |
546 | /* this is the proxy pty that will be given to the client, and that |
547 | * the real pty master will send to / recv from | |
548 | */ | |
025ed0f3 SH |
549 | ret = openpty(&console->peerpty.master, &console->peerpty.slave, |
550 | console->peerpty.name, NULL, NULL); | |
025ed0f3 | 551 | if (ret) { |
b5159817 DE |
552 | SYSERROR("failed to create proxy pty"); |
553 | return -1; | |
554 | } | |
596a818d | 555 | |
0d4137cc | 556 | if (lxc_setup_tios(console->peerpty.slave, &oldtermio) < 0) |
b5159817 DE |
557 | goto err1; |
558 | ||
0519b5cc | 559 | ts = lxc_console_signal_init(console->peerpty.master, console->master); |
b5159817 DE |
560 | if (!ts) |
561 | goto err1; | |
562 | ||
563 | console->tty_state = ts; | |
564 | console->peer = console->peerpty.slave; | |
565 | console->peerpty.busy = sockfd; | |
a529bc25 CB |
566 | ret = lxc_console_mainloop_add_peer(console); |
567 | if (ret < 0) | |
568 | goto err1; | |
b5159817 | 569 | |
0059379f | 570 | DEBUG("%d %s peermaster:%d sockfd:%d", lxc_raw_getpid(), __FUNCTION__, console->peerpty.master, sockfd); |
b5159817 DE |
571 | return 0; |
572 | ||
573 | err1: | |
574 | lxc_console_peer_proxy_free(console); | |
63376d7d DL |
575 | return -1; |
576 | } | |
577 | ||
b5159817 DE |
578 | int lxc_console_allocate(struct lxc_conf *conf, int sockfd, int *ttyreq) |
579 | { | |
580 | int masterfd = -1, ttynum; | |
581 | struct lxc_tty_info *tty_info = &conf->tty_info; | |
9785b539 | 582 | struct lxc_pty *console = &conf->console; |
b5159817 | 583 | |
b5159817 DE |
584 | if (*ttyreq == 0) { |
585 | if (lxc_console_peer_proxy_alloc(console, sockfd) < 0) | |
586 | goto out; | |
587 | masterfd = console->peerpty.master; | |
588 | goto out; | |
589 | } | |
590 | ||
591 | if (*ttyreq > 0) { | |
592 | if (*ttyreq > tty_info->nbtty) | |
593 | goto out; | |
594 | ||
595 | if (tty_info->pty_info[*ttyreq - 1].busy) | |
596 | goto out; | |
597 | ||
598 | /* the requested tty is available */ | |
599 | ttynum = *ttyreq; | |
600 | goto out_tty; | |
601 | } | |
602 | ||
603 | /* search for next available tty, fixup index tty1 => [0] */ | |
0d4137cc CB |
604 | for (ttynum = 1; ttynum <= tty_info->nbtty && tty_info->pty_info[ttynum - 1].busy; ttynum++) |
605 | ; | |
b5159817 DE |
606 | |
607 | /* we didn't find any available slot for tty */ | |
608 | if (ttynum > tty_info->nbtty) | |
609 | goto out; | |
610 | ||
611 | *ttyreq = ttynum; | |
612 | ||
613 | out_tty: | |
614 | tty_info->pty_info[ttynum - 1].busy = sockfd; | |
615 | masterfd = tty_info->pty_info[ttynum - 1].master; | |
616 | out: | |
b5159817 DE |
617 | return masterfd; |
618 | } | |
619 | ||
b5159817 | 620 | void lxc_console_free(struct lxc_conf *conf, int fd) |
63376d7d | 621 | { |
b5159817 DE |
622 | int i; |
623 | struct lxc_tty_info *tty_info = &conf->tty_info; | |
9785b539 | 624 | struct lxc_pty *console = &conf->console; |
b5159817 | 625 | |
b5159817 DE |
626 | for (i = 0; i < tty_info->nbtty; i++) { |
627 | if (tty_info->pty_info[i].busy == fd) | |
628 | tty_info->pty_info[i].busy = 0; | |
629 | } | |
630 | ||
631 | if (console->peerpty.busy == fd) { | |
632 | lxc_mainloop_del_handler(console->descr, console->peerpty.slave); | |
633 | lxc_console_peer_proxy_free(console); | |
634 | } | |
b5159817 DE |
635 | } |
636 | ||
9785b539 | 637 | static int lxc_console_peer_default(struct lxc_pty *console) |
b5159817 DE |
638 | { |
639 | struct lxc_tty_state *ts; | |
640 | const char *path = console->path; | |
467c7ff3 CB |
641 | int fd; |
642 | int ret = 0; | |
b5159817 | 643 | |
467c7ff3 CB |
644 | /* If no console was given, try current controlling terminal, there |
645 | * won't be one if we were started as a daemon (-d). | |
b5159817 DE |
646 | */ |
647 | if (!path && !access("/dev/tty", F_OK)) { | |
b5159817 DE |
648 | fd = open("/dev/tty", O_RDWR); |
649 | if (fd >= 0) { | |
650 | close(fd); | |
651 | path = "/dev/tty"; | |
652 | } | |
653 | } | |
654 | ||
467c7ff3 CB |
655 | if (!path) { |
656 | errno = ENOTTY; | |
657 | DEBUG("process does not have a controlling terminal"); | |
b5159817 | 658 | goto out; |
467c7ff3 | 659 | } |
b5159817 | 660 | |
a63fade5 | 661 | console->peer = lxc_unpriv(open(path, O_RDWR | O_CLOEXEC)); |
467c7ff3 | 662 | if (console->peer < 0) { |
a63fade5 | 663 | ERROR("Failed to open \"%s\": %s", path, strerror(errno)); |
467c7ff3 CB |
664 | return -ENOTTY; |
665 | } | |
666 | DEBUG("using \"%s\" as peer tty device", path); | |
b5159817 | 667 | |
467c7ff3 CB |
668 | if (!isatty(console->peer)) { |
669 | ERROR("file descriptor for file \"%s\" does not refer to a tty device", path); | |
670 | goto on_error1; | |
671 | } | |
b5159817 | 672 | |
0519b5cc | 673 | ts = lxc_console_signal_init(console->peer, console->master); |
b5159817 | 674 | console->tty_state = ts; |
341c2aed | 675 | if (!ts) { |
0519b5cc | 676 | WARN("Failed to install signal handler"); |
467c7ff3 | 677 | goto on_error1; |
341c2aed | 678 | } |
b5159817 DE |
679 | |
680 | lxc_console_winsz(console->peer, console->master); | |
681 | ||
682 | console->tios = malloc(sizeof(*console->tios)); | |
683 | if (!console->tios) { | |
684 | SYSERROR("failed to allocate memory"); | |
467c7ff3 | 685 | goto on_error1; |
b5159817 DE |
686 | } |
687 | ||
0d4137cc | 688 | if (lxc_setup_tios(console->peer, console->tios) < 0) |
467c7ff3 CB |
689 | goto on_error2; |
690 | else | |
691 | goto out; | |
b5159817 | 692 | |
467c7ff3 | 693 | on_error2: |
b5159817 DE |
694 | free(console->tios); |
695 | console->tios = NULL; | |
467c7ff3 CB |
696 | |
697 | on_error1: | |
b5159817 DE |
698 | close(console->peer); |
699 | console->peer = -1; | |
467c7ff3 CB |
700 | ret = -ENOTTY; |
701 | ||
b5159817 | 702 | out: |
467c7ff3 | 703 | return ret; |
b5159817 DE |
704 | } |
705 | ||
9785b539 | 706 | int lxc_console_write_ringbuffer(struct lxc_pty *console) |
39c6cdb7 CB |
707 | { |
708 | char *r_addr; | |
709 | ssize_t ret; | |
710 | uint64_t used; | |
711 | struct lxc_ringbuf *buf = &console->ringbuf; | |
712 | ||
713 | /* There's not log file where we can dump the ringbuffer to. */ | |
714 | if (console->log_fd < 0) | |
715 | return 0; | |
716 | ||
717 | /* The log file is simply appended to. */ | |
718 | if (console->log_size == 0) | |
719 | return 0; | |
720 | ||
39c6cdb7 CB |
721 | used = lxc_ringbuf_used(buf); |
722 | if (used == 0) | |
723 | return 0; | |
724 | ||
725 | ret = lxc_console_truncate_log_file(console); | |
726 | if (ret < 0) | |
727 | return ret; | |
728 | ||
729 | /* Write as much as we can without exceeding the limit. */ | |
730 | if (console->log_size < used) | |
731 | used = console->log_size; | |
732 | ||
733 | r_addr = lxc_ringbuf_get_read_addr(buf); | |
734 | ret = lxc_write_nointr(console->log_fd, r_addr, used); | |
735 | if (ret < 0) | |
736 | return -EIO; | |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
9785b539 | 741 | void lxc_console_delete(struct lxc_pty *console) |
b5159817 | 742 | { |
69629c82 CB |
743 | int ret; |
744 | ||
39c6cdb7 CB |
745 | ret = lxc_console_write_ringbuffer(console); |
746 | if (ret < 0) | |
747 | WARN("Failed to write console ringbuffer to console log file"); | |
748 | ||
69629c82 CB |
749 | if (console->tios && console->peer >= 0) { |
750 | ret = tcsetattr(console->peer, TCSAFLUSH, console->tios); | |
751 | if (ret < 0) | |
752 | WARN("%s - Failed to set old terminal settings", strerror(errno)); | |
753 | } | |
596a818d DE |
754 | free(console->tios); |
755 | console->tios = NULL; | |
756 | ||
bc9724f7 CB |
757 | if (console->peer >= 0) |
758 | close(console->peer); | |
025ed0f3 | 759 | console->peer = -1; |
bc9724f7 CB |
760 | |
761 | if (console->master >= 0) | |
762 | close(console->master); | |
596a818d | 763 | console->master = -1; |
bc9724f7 CB |
764 | |
765 | if (console->slave >= 0) | |
766 | close(console->slave); | |
596a818d | 767 | console->slave = -1; |
bc9724f7 CB |
768 | |
769 | if (console->log_fd >= 0) | |
770 | close(console->log_fd); | |
025ed0f3 | 771 | console->log_fd = -1; |
63376d7d DL |
772 | } |
773 | ||
3b988b33 CB |
774 | /** |
775 | * Note that this function needs to run before the mainloop starts. Since we | |
776 | * register a handler for the console's masterfd when we create the mainloop | |
777 | * the console handler needs to see an allocated ringbuffer. | |
778 | */ | |
9785b539 | 779 | static int lxc_console_create_ringbuf(struct lxc_pty *console) |
3b988b33 CB |
780 | { |
781 | int ret; | |
782 | struct lxc_ringbuf *buf = &console->ringbuf; | |
28f3b1cd | 783 | uint64_t size = console->buffer_size; |
3b988b33 CB |
784 | |
785 | /* no ringbuffer previously allocated and no ringbuffer requested */ | |
786 | if (!buf->addr && size <= 0) | |
787 | return 0; | |
788 | ||
789 | /* ringbuffer allocated but no new ringbuffer requested */ | |
790 | if (buf->addr && size <= 0) { | |
791 | lxc_ringbuf_release(buf); | |
792 | buf->addr = NULL; | |
793 | buf->r_off = 0; | |
794 | buf->w_off = 0; | |
795 | buf->size = 0; | |
796 | TRACE("Deallocated console ringbuffer"); | |
797 | return 0; | |
798 | } | |
799 | ||
800 | if (size <= 0) | |
801 | return 0; | |
802 | ||
803 | /* check wether the requested size for the ringbuffer has changed */ | |
804 | if (buf->addr && buf->size != size) { | |
805 | TRACE("Console ringbuffer size changed from %" PRIu64 | |
806 | " to %" PRIu64 " bytes. Deallocating console ringbuffer", | |
807 | buf->size, size); | |
808 | lxc_ringbuf_release(buf); | |
809 | } | |
810 | ||
811 | ret = lxc_ringbuf_create(buf, size); | |
812 | if (ret < 0) { | |
813 | ERROR("Failed to setup %" PRIu64 " byte console ringbuffer", size); | |
814 | return -1; | |
815 | } | |
816 | ||
817 | TRACE("Allocated %" PRIu64 " byte console ringbuffer", size); | |
818 | return 0; | |
819 | } | |
820 | ||
a0309168 CB |
821 | /** |
822 | * This is the console log file. Please note that the console log file is | |
823 | * (implementation wise not content wise) independent of the console ringbuffer. | |
824 | */ | |
9785b539 | 825 | int lxc_console_create_log_file(struct lxc_pty *console) |
a0309168 CB |
826 | { |
827 | if (!console->log_path) | |
828 | return 0; | |
829 | ||
830 | console->log_fd = lxc_unpriv(open(console->log_path, O_CLOEXEC | O_RDWR | O_CREAT | O_APPEND, 0600)); | |
831 | if (console->log_fd < 0) { | |
832 | SYSERROR("Failed to open console log file \"%s\"", console->log_path); | |
833 | return -1; | |
834 | } | |
835 | ||
836 | DEBUG("Using \"%s\" as console log file", console->log_path); | |
837 | return 0; | |
838 | } | |
839 | ||
9785b539 | 840 | int lxc_pty_create(struct lxc_pty *console) |
63376d7d | 841 | { |
69629c82 | 842 | int ret, saved_errno; |
b5159817 | 843 | |
5777fe90 CB |
844 | ret = openpty(&console->master, &console->slave, console->name, NULL, |
845 | NULL); | |
69629c82 | 846 | saved_errno = errno; |
467c7ff3 | 847 | if (ret < 0) { |
69629c82 | 848 | ERROR("%s - Failed to allocate a pty", strerror(saved_errno)); |
b5159817 DE |
849 | return -1; |
850 | } | |
851 | ||
69629c82 CB |
852 | ret = fcntl(console->master, F_SETFD, FD_CLOEXEC); |
853 | if (ret < 0) { | |
854 | SYSERROR("Failed to set FD_CLOEXEC flag on console master"); | |
b5159817 DE |
855 | goto err; |
856 | } | |
857 | ||
69629c82 CB |
858 | ret = fcntl(console->slave, F_SETFD, FD_CLOEXEC); |
859 | if (ret < 0) { | |
860 | SYSERROR("Failed to set FD_CLOEXEC flag on console slave"); | |
b5159817 DE |
861 | goto err; |
862 | } | |
863 | ||
467c7ff3 CB |
864 | ret = lxc_console_peer_default(console); |
865 | if (ret < 0) { | |
69629c82 | 866 | ERROR("Failed to allocate a peer pty device"); |
467c7ff3 CB |
867 | goto err; |
868 | } | |
b5159817 | 869 | |
5777fe90 CB |
870 | return 0; |
871 | ||
872 | err: | |
873 | lxc_console_delete(console); | |
874 | return -ENODEV; | |
875 | } | |
876 | ||
877 | int lxc_console_create(struct lxc_conf *conf) | |
878 | { | |
879 | int ret; | |
9785b539 | 880 | struct lxc_pty *console = &conf->console; |
5777fe90 | 881 | |
5777fe90 CB |
882 | if (console->path && !strcmp(console->path, "none")) { |
883 | INFO("No console was requested"); | |
884 | return 0; | |
885 | } | |
886 | ||
887 | ret = lxc_pty_create(console); | |
888 | if (ret < 0) | |
889 | return -1; | |
890 | ||
a0309168 CB |
891 | /* create console log file */ |
892 | ret = lxc_console_create_log_file(console); | |
893 | if (ret < 0) | |
894 | goto err; | |
895 | ||
896 | /* create console ringbuffer */ | |
897 | ret = lxc_console_create_ringbuf(console); | |
898 | if (ret < 0) | |
899 | goto err; | |
b5159817 DE |
900 | |
901 | return 0; | |
902 | ||
903 | err: | |
904 | lxc_console_delete(console); | |
69629c82 | 905 | return -ENODEV; |
b5159817 DE |
906 | } |
907 | ||
39a78bbe | 908 | int lxc_console_set_stdfds(int fd) |
0d9acb99 | 909 | { |
39a78bbe | 910 | if (fd < 0) |
0d9acb99 | 911 | return 0; |
b5159817 | 912 | |
39a78bbe CB |
913 | if (isatty(STDIN_FILENO)) |
914 | if (dup2(fd, STDIN_FILENO) < 0) { | |
915 | SYSERROR("failed to duplicate stdin."); | |
916 | return -1; | |
917 | } | |
918 | ||
919 | if (isatty(STDOUT_FILENO)) | |
920 | if (dup2(fd, STDOUT_FILENO) < 0) { | |
921 | SYSERROR("failed to duplicate stdout."); | |
922 | return -1; | |
923 | } | |
924 | ||
925 | if (isatty(STDERR_FILENO)) | |
926 | if (dup2(fd, STDERR_FILENO) < 0) { | |
927 | SYSERROR("failed to duplicate stderr."); | |
928 | return -1; | |
929 | } | |
930 | ||
0d9acb99 DE |
931 | return 0; |
932 | } | |
b5159817 | 933 | |
0d4137cc CB |
934 | int lxc_console_cb_tty_stdin(int fd, uint32_t events, void *cbdata, |
935 | struct lxc_epoll_descr *descr) | |
b5159817 DE |
936 | { |
937 | struct lxc_tty_state *ts = cbdata; | |
938 | char c; | |
939 | ||
97bc2422 | 940 | if (fd != ts->stdinfd) |
a529bc25 | 941 | return LXC_MAINLOOP_CLOSE; |
97bc2422 | 942 | |
e66b6c96 | 943 | if (lxc_read_nointr(ts->stdinfd, &c, 1) <= 0) |
a529bc25 | 944 | return LXC_MAINLOOP_CLOSE; |
63376d7d | 945 | |
525e2117 | 946 | if (ts->escape >= 1) { |
014d5e1e CB |
947 | /* we want to exit the console with Ctrl+a q */ |
948 | if (c == ts->escape && !ts->saw_escape) { | |
949 | ts->saw_escape = 1; | |
950 | return 0; | |
951 | } | |
5c294060 | 952 | |
014d5e1e | 953 | if (c == 'q' && ts->saw_escape) |
a529bc25 | 954 | return LXC_MAINLOOP_CLOSE; |
014d5e1e CB |
955 | |
956 | ts->saw_escape = 0; | |
957 | } | |
63376d7d | 958 | |
e66b6c96 | 959 | if (lxc_write_nointr(ts->masterfd, &c, 1) <= 0) |
a529bc25 | 960 | return LXC_MAINLOOP_CLOSE; |
b5159817 | 961 | |
63376d7d DL |
962 | return 0; |
963 | } | |
964 | ||
0d4137cc CB |
965 | int lxc_console_cb_tty_master(int fd, uint32_t events, void *cbdata, |
966 | struct lxc_epoll_descr *descr) | |
63376d7d | 967 | { |
b5159817 | 968 | struct lxc_tty_state *ts = cbdata; |
732375f5 | 969 | char buf[LXC_CONSOLE_BUFFER_SIZE]; |
0d4137cc | 970 | int r, w; |
63376d7d | 971 | |
97bc2422 | 972 | if (fd != ts->masterfd) |
a529bc25 | 973 | return LXC_MAINLOOP_CLOSE; |
97bc2422 | 974 | |
e66b6c96 CB |
975 | r = lxc_read_nointr(fd, buf, sizeof(buf)); |
976 | if (r <= 0) | |
a529bc25 | 977 | return LXC_MAINLOOP_CLOSE; |
1560f6c9 | 978 | |
e66b6c96 CB |
979 | w = lxc_write_nointr(ts->stdoutfd, buf, r); |
980 | if (w <= 0) { | |
a529bc25 | 981 | return LXC_MAINLOOP_CLOSE; |
e66b6c96 | 982 | } else if (w != r) { |
a529bc25 | 983 | SYSERROR("Failed to write"); |
b5159817 | 984 | return 1; |
f78a1f32 DL |
985 | } |
986 | ||
b5159817 DE |
987 | return 0; |
988 | } | |
989 | ||
990 | int lxc_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd) | |
991 | { | |
992 | return lxc_cmd_console(c->name, ttynum, masterfd, c->config_path); | |
993 | } | |
994 | ||
995 | int lxc_console(struct lxc_container *c, int ttynum, | |
996 | int stdinfd, int stdoutfd, int stderrfd, | |
997 | int escape) | |
998 | { | |
999 | int ret, ttyfd, masterfd; | |
1000 | struct lxc_epoll_descr descr; | |
1001 | struct termios oldtios; | |
1002 | struct lxc_tty_state *ts; | |
25964232 | 1003 | int istty = 0; |
b5159817 | 1004 | |
b5159817 | 1005 | ttyfd = lxc_cmd_console(c->name, &ttynum, &masterfd, c->config_path); |
6834f805 CB |
1006 | if (ttyfd < 0) |
1007 | return -1; | |
b5159817 DE |
1008 | |
1009 | ret = setsid(); | |
33b4b411 CB |
1010 | if (ret < 0) |
1011 | TRACE("Process is already group leader"); | |
b5159817 | 1012 | |
0519b5cc | 1013 | ts = lxc_console_signal_init(stdinfd, masterfd); |
b5159817 DE |
1014 | if (!ts) { |
1015 | ret = -1; | |
33b4b411 | 1016 | goto close_fds; |
b5159817 DE |
1017 | } |
1018 | ts->escape = escape; | |
1019 | ts->winch_proxy = c->name; | |
1020 | ts->winch_proxy_lxcpath = c->config_path; | |
3b975060 | 1021 | ts->stdoutfd = stdoutfd; |
b5159817 | 1022 | |
6834f805 | 1023 | istty = isatty(stdinfd); |
25964232 LF |
1024 | if (istty) { |
1025 | lxc_console_winsz(stdinfd, masterfd); | |
1026 | lxc_cmd_console_winch(ts->winch_proxy, ts->winch_proxy_lxcpath); | |
6834f805 CB |
1027 | } else { |
1028 | INFO("File descriptor %d does not refer to a tty device", stdinfd); | |
25964232 | 1029 | } |
b5159817 DE |
1030 | |
1031 | ret = lxc_mainloop_open(&descr); | |
1032 | if (ret) { | |
33b4b411 CB |
1033 | ERROR("Failed to create mainloop"); |
1034 | goto sigwinch_fini; | |
b5159817 DE |
1035 | } |
1036 | ||
341c2aed CB |
1037 | if (ts->sigfd != -1) { |
1038 | ret = lxc_mainloop_add_handler(&descr, ts->sigfd, | |
0519b5cc | 1039 | lxc_console_cb_signal_fd, ts); |
33b4b411 | 1040 | if (ret < 0) { |
0519b5cc | 1041 | ERROR("Failed to add signal handler to mainloop"); |
33b4b411 | 1042 | goto close_mainloop; |
341c2aed | 1043 | } |
b5159817 DE |
1044 | } |
1045 | ||
1046 | ret = lxc_mainloop_add_handler(&descr, ts->stdinfd, | |
1047 | lxc_console_cb_tty_stdin, ts); | |
33b4b411 CB |
1048 | if (ret < 0) { |
1049 | ERROR("Failed to add stdin handler"); | |
1050 | goto close_mainloop; | |
b5159817 DE |
1051 | } |
1052 | ||
1053 | ret = lxc_mainloop_add_handler(&descr, ts->masterfd, | |
1054 | lxc_console_cb_tty_master, ts); | |
33b4b411 CB |
1055 | if (ret < 0) { |
1056 | ERROR("Failed to add master handler"); | |
1057 | goto close_mainloop; | |
b5159817 DE |
1058 | } |
1059 | ||
686df166 CB |
1060 | if (ts->escape >= 1) { |
1061 | fprintf(stderr, | |
1062 | "\n" | |
6834f805 CB |
1063 | "Connected to tty %1$d\n" |
1064 | "Type <Ctrl+%2$c q> to exit the console, " | |
1065 | "<Ctrl+%2$c Ctrl+%2$c> to enter Ctrl+%2$c itself\n", | |
1066 | ttynum, 'a' + escape - 1); | |
686df166 | 1067 | } |
6834f805 CB |
1068 | |
1069 | if (istty) { | |
1070 | ret = lxc_setup_tios(stdinfd, &oldtios); | |
1071 | if (ret < 0) | |
1072 | goto close_mainloop; | |
1073 | } | |
1074 | ||
025ed0f3 | 1075 | ret = lxc_mainloop(&descr, -1); |
33b4b411 CB |
1076 | if (ret < 0) { |
1077 | ERROR("The mainloop returned an error"); | |
6834f805 | 1078 | goto restore_tios; |
b5159817 DE |
1079 | } |
1080 | ||
1081 | ret = 0; | |
1082 | ||
6834f805 CB |
1083 | restore_tios: |
1084 | if (istty) { | |
1085 | istty = tcsetattr(stdinfd, TCSAFLUSH, &oldtios); | |
1086 | if (istty < 0) | |
1087 | WARN("%s - Failed to restore terminal properties", | |
1088 | strerror(errno)); | |
1089 | } | |
1090 | ||
33b4b411 | 1091 | close_mainloop: |
b5159817 | 1092 | lxc_mainloop_close(&descr); |
33b4b411 CB |
1093 | |
1094 | sigwinch_fini: | |
0519b5cc | 1095 | lxc_console_signal_fini(ts); |
33b4b411 CB |
1096 | |
1097 | close_fds: | |
b5159817 DE |
1098 | close(masterfd); |
1099 | close(ttyfd); | |
33b4b411 | 1100 | |
b5159817 | 1101 | return ret; |
63376d7d | 1102 | } |
e98affda CB |
1103 | |
1104 | int lxc_make_controlling_pty(int fd) | |
1105 | { | |
1106 | int ret; | |
1107 | ||
1108 | setsid(); | |
1109 | ||
1110 | ret = ioctl(fd, TIOCSCTTY, (char *)NULL); | |
1111 | if (ret < 0) | |
1112 | return -1; | |
1113 | ||
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | int lxc_login_pty(int fd) | |
1118 | { | |
1119 | int ret; | |
1120 | ||
1121 | ret = lxc_make_controlling_pty(fd); | |
1122 | if (ret < 0) | |
1123 | return -1; | |
1124 | ||
1125 | ret = lxc_console_set_stdfds(fd); | |
1126 | if (ret < 0) | |
1127 | return -1; | |
1128 | ||
1129 | if (fd > STDERR_FILENO) | |
1130 | close(fd); | |
1131 | ||
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | void lxc_pty_info_init(struct lxc_pty_info *pty) | |
1136 | { | |
1137 | pty->name[0] = '\0'; | |
1138 | pty->master = -EBADF; | |
1139 | pty->slave = -EBADF; | |
1140 | pty->busy = -1; | |
1141 | } | |
1142 | ||
9785b539 | 1143 | void lxc_pty_init(struct lxc_pty *pty) |
e98affda CB |
1144 | { |
1145 | memset(pty, 0, sizeof(*pty)); | |
1146 | pty->slave = -EBADF; | |
1147 | pty->master = -EBADF; | |
1148 | pty->peer = -EBADF; | |
1149 | pty->log_fd = -EBADF; | |
e98affda CB |
1150 | lxc_pty_info_init(&pty->peerpty); |
1151 | } | |
1152 | ||
9785b539 | 1153 | void lxc_pty_conf_free(struct lxc_pty *console) |
e98affda | 1154 | { |
e98affda CB |
1155 | free(console->log_path); |
1156 | free(console->path); | |
1157 | if (console->buffer_size > 0 && console->ringbuf.addr) | |
1158 | lxc_ringbuf_release(&console->ringbuf); | |
1159 | } | |
7cfeddd7 | 1160 | |
9785b539 | 1161 | int lxc_pty_map_ids(struct lxc_conf *c, struct lxc_pty *pty) |
7cfeddd7 CB |
1162 | { |
1163 | int ret; | |
1164 | ||
1165 | if (lxc_list_empty(&c->id_map)) | |
1166 | return 0; | |
1167 | ||
1168 | ret = strcmp(pty->name, ""); | |
1169 | if (ret == 0) | |
1170 | return 0; | |
1171 | ||
1172 | ret = chown_mapped_root(pty->name, c); | |
1173 | if (ret < 0) { | |
1174 | ERROR("Failed to chown \"%s\"", pty->name); | |
1175 | return -1; | |
1176 | } | |
1177 | ||
1178 | TRACE("Chowned \"%s\"", pty->name); | |
1179 | ||
1180 | return 0; | |
1181 | } |