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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 | ||
de708fb7 | 54 | #define LXC_TERMINAL_BUFFER_SIZE 1024 |
732375f5 | 55 | |
2083d59d | 56 | lxc_log_define(terminal, lxc); |
36eb9bde | 57 | |
b5159817 | 58 | static struct lxc_list lxc_ttys; |
724e753c | 59 | |
b5159817 | 60 | typedef void (*sighandler_t)(int); |
b5159817 | 61 | |
fc26f086 | 62 | __attribute__((constructor)) void lxc_terminal_init_global(void) |
b5159817 DE |
63 | { |
64 | lxc_list_init(&lxc_ttys); | |
65 | } | |
724e753c | 66 | |
4e9c0330 | 67 | void lxc_terminal_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 | |
7a10164a | 91 | static void lxc_terminal_winch(struct lxc_tty_state *ts) |
b5159817 | 92 | { |
4e9c0330 | 93 | lxc_terminal_winsz(ts->stdinfd, ts->masterfd); |
0519b5cc | 94 | |
0d4137cc | 95 | if (ts->winch_proxy) |
8ccbbf94 | 96 | lxc_cmd_terminal_winch(ts->winch_proxy, ts->winch_proxy_lxcpath); |
724e753c MN |
97 | } |
98 | ||
dad4a039 | 99 | void lxc_terminal_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; | |
7a10164a | 106 | lxc_terminal_winch(ts); |
cd453b38 | 107 | } |
b5159817 | 108 | } |
cd453b38 | 109 | |
9bafc8cb CB |
110 | int lxc_terminal_signalfd_cb(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 | 123 | if (siginfo.ssi_signo == SIGTERM) { |
9bafc8cb | 124 | DEBUG("Received SIGTERM. Detaching from the terminal"); |
a529bc25 | 125 | return LXC_MAINLOOP_CLOSE; |
1349e92e CB |
126 | } |
127 | ||
128 | if (siginfo.ssi_signo == SIGWINCH) | |
7a10164a | 129 | lxc_terminal_winch(ts); |
1349e92e | 130 | |
b5159817 DE |
131 | return 0; |
132 | } | |
133 | ||
dc8c7883 | 134 | struct lxc_tty_state *lxc_terminal_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 | ||
a8867251 | 192 | void lxc_terminal_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 | |
99a04585 | 207 | static int lxc_terminal_truncate_log_file(struct lxc_terminal *terminal) |
861813e5 CB |
208 | { |
209 | /* be very certain things are kosher */ | |
2083d59d | 210 | if (!terminal->log_path || terminal->log_fd < 0) |
861813e5 CB |
211 | return -EBADF; |
212 | ||
2083d59d | 213 | return lxc_unpriv(ftruncate(terminal->log_fd, 0)); |
861813e5 CB |
214 | } |
215 | ||
99a04585 | 216 | static int lxc_console_rotate_log_file(struct lxc_terminal *terminal) |
861813e5 CB |
217 | { |
218 | int ret; | |
219 | size_t len; | |
220 | char *tmp; | |
221 | ||
99a04585 | 222 | if (!terminal->log_path || terminal->log_rotate == 0) |
861813e5 CB |
223 | return -EOPNOTSUPP; |
224 | ||
225 | /* be very certain things are kosher */ | |
99a04585 | 226 | if (terminal->log_fd < 0) |
861813e5 CB |
227 | return -EBADF; |
228 | ||
99a04585 | 229 | len = strlen(terminal->log_path) + sizeof(".1"); |
861813e5 CB |
230 | tmp = alloca(len); |
231 | ||
99a04585 | 232 | ret = snprintf(tmp, len, "%s.1", terminal->log_path); |
861813e5 CB |
233 | if (ret < 0 || (size_t)ret >= len) |
234 | return -EFBIG; | |
235 | ||
99a04585 CB |
236 | close(terminal->log_fd); |
237 | terminal->log_fd = -1; | |
238 | ret = lxc_unpriv(rename(terminal->log_path, tmp)); | |
861813e5 CB |
239 | if (ret < 0) |
240 | return ret; | |
241 | ||
99a04585 | 242 | return lxc_terminal_create_log_file(terminal); |
861813e5 CB |
243 | } |
244 | ||
99a04585 | 245 | static int lxc_console_write_log_file(struct lxc_terminal *terminal, char *buf, |
861813e5 CB |
246 | int bytes_read) |
247 | { | |
248 | int ret; | |
249 | int64_t space_left = -1; | |
250 | struct stat st; | |
251 | ||
99a04585 | 252 | if (terminal->log_fd < 0) |
861813e5 CB |
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 | */ | |
99a04585 CB |
259 | if (terminal->log_size <= 0) |
260 | return lxc_write_nointr(terminal->log_fd, buf, bytes_read); | |
861813e5 CB |
261 | |
262 | /* Get current size of the log file. */ | |
99a04585 | 263 | ret = fstat(terminal->log_fd, &st); |
861813e5 | 264 | if (ret < 0) { |
99a04585 | 265 | SYSERROR("Failed to stat the terminal log file descriptor"); |
861813e5 CB |
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 | */ | |
99a04585 | 276 | if (terminal->log_rotate > 0 || terminal->log_size > 0) |
861813e5 CB |
277 | return -EINVAL; |
278 | ||
279 | /* I mean, sure log wherever you want to. */ | |
99a04585 | 280 | return lxc_write_nointr(terminal->log_fd, buf, bytes_read); |
861813e5 CB |
281 | } |
282 | ||
99a04585 | 283 | space_left = terminal->log_size - st.st_size; |
861813e5 CB |
284 | |
285 | /* User doesn't want to rotate the log file and there's no more space | |
286 | * left so simply truncate it. | |
287 | */ | |
99a04585 CB |
288 | if (space_left <= 0 && terminal->log_rotate <= 0) { |
289 | ret = lxc_terminal_truncate_log_file(terminal); | |
861813e5 CB |
290 | if (ret < 0) |
291 | return ret; | |
292 | ||
99a04585 CB |
293 | if (bytes_read <= terminal->log_size) |
294 | return lxc_write_nointr(terminal->log_fd, buf, bytes_read); | |
861813e5 CB |
295 | |
296 | /* Write as much as we can into the buffer and loose the rest. */ | |
99a04585 | 297 | return lxc_write_nointr(terminal->log_fd, buf, terminal->log_size); |
861813e5 CB |
298 | } |
299 | ||
300 | /* There's enough space left. */ | |
301 | if (bytes_read <= space_left) | |
99a04585 | 302 | return lxc_write_nointr(terminal->log_fd, buf, bytes_read); |
861813e5 CB |
303 | |
304 | /* There's not enough space left but at least write as much as we can | |
305 | * into the old log file. | |
306 | */ | |
99a04585 | 307 | ret = lxc_write_nointr(terminal->log_fd, buf, space_left); |
861813e5 CB |
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 | */ | |
99a04585 CB |
317 | if (terminal->log_rotate > 0) |
318 | ret = lxc_console_rotate_log_file(terminal); | |
861813e5 | 319 | else |
99a04585 | 320 | ret = lxc_terminal_truncate_log_file(terminal); |
861813e5 CB |
321 | if (ret < 0) |
322 | return ret; | |
323 | ||
99a04585 | 324 | if (terminal->log_size < bytes_read) { |
861813e5 CB |
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 | |
99a04585 | 331 | * standard pty-based terminal that LXC allocates since it will |
861813e5 CB |
332 | * be switched into raw mode. In raw mode only 1 byte at a time |
333 | * should be read and written. | |
334 | */ | |
99a04585 CB |
335 | WARN("Size of terminal log file is smaller than the bytes to write"); |
336 | ret = lxc_write_nointr(terminal->log_fd, buf, terminal->log_size); | |
861813e5 CB |
337 | if (ret < 0) |
338 | return -1; | |
339 | bytes_read -= ret; | |
340 | return bytes_read; | |
341 | } | |
342 | ||
343 | /* Yay, we made it. */ | |
99a04585 | 344 | ret = lxc_write_nointr(terminal->log_fd, buf, bytes_read); |
861813e5 CB |
345 | if (ret < 0) |
346 | return -1; | |
347 | bytes_read -= ret; | |
348 | return bytes_read; | |
349 | } | |
350 | ||
de708fb7 | 351 | int lxc_terminal_io_cb(int fd, uint32_t events, void *data, |
a529bc25 | 352 | struct lxc_epoll_descr *descr) |
b5159817 | 353 | { |
dcad02f8 | 354 | struct lxc_terminal *terminal = data; |
de708fb7 | 355 | char buf[LXC_TERMINAL_BUFFER_SIZE]; |
732375f5 | 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) { | |
de708fb7 | 360 | INFO("Terminal client on fd %d has exited", fd); |
b5159817 | 361 | lxc_mainloop_del_handler(descr, fd); |
c06a0555 | 362 | |
de708fb7 CB |
363 | if (fd == terminal->master) { |
364 | terminal->master = -EBADF; | |
365 | } else if (fd == terminal->peer) { | |
366 | if (terminal->tty_state) { | |
367 | lxc_terminal_signal_fini(terminal->tty_state); | |
368 | terminal->tty_state = NULL; | |
0b1e242b | 369 | } |
de708fb7 | 370 | terminal->peer = -EBADF; |
c06a0555 CB |
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 | |
de708fb7 CB |
379 | if (fd == terminal->peer) |
380 | w = lxc_write_nointr(terminal->master, buf, r); | |
b5159817 | 381 | |
732375f5 | 382 | w_rbuf = w_log = 0; |
de708fb7 | 383 | if (fd == terminal->master) { |
732375f5 | 384 | /* write to peer first */ |
de708fb7 CB |
385 | if (terminal->peer >= 0) |
386 | w = lxc_write_nointr(terminal->peer, buf, r); | |
732375f5 | 387 | |
de708fb7 CB |
388 | /* write to terminal ringbuffer */ |
389 | if (terminal->buffer_size > 0) | |
390 | w_rbuf = lxc_ringbuf_write(&terminal->ringbuf, buf, r); | |
861813e5 | 391 | |
de708fb7 CB |
392 | /* write to terminal log */ |
393 | if (terminal->log_fd >= 0) | |
394 | w_log = lxc_console_write_log_file(terminal, buf, r); | |
63376d7d DL |
395 | } |
396 | ||
b5159817 | 397 | if (w != r) |
de708fb7 | 398 | WARN("Short write on terminal r:%d != w:%d", r, w); |
732375f5 CB |
399 | |
400 | if (w_rbuf < 0) | |
de708fb7 | 401 | TRACE("%s - Failed to write %d bytes to terminal ringbuffer", |
732375f5 CB |
402 | strerror(-w_rbuf), r); |
403 | ||
404 | if (w_log < 0) | |
de708fb7 | 405 | TRACE("Failed to write %d bytes to terminal log", r); |
0d4137cc | 406 | |
b5159817 DE |
407 | return 0; |
408 | } | |
409 | ||
dcad02f8 | 410 | static int lxc_terminal_mainloop_add_peer(struct lxc_terminal *terminal) |
b5159817 | 411 | { |
a529bc25 CB |
412 | int ret; |
413 | ||
2083d59d CB |
414 | if (terminal->peer >= 0) { |
415 | ret = lxc_mainloop_add_handler(terminal->descr, terminal->peer, | |
416 | lxc_terminal_io_cb, terminal); | |
a529bc25 | 417 | if (ret < 0) { |
2083d59d | 418 | WARN("Failed to add terminal peer handler to mainloop"); |
a529bc25 CB |
419 | return -1; |
420 | } | |
63376d7d DL |
421 | } |
422 | ||
2083d59d | 423 | if (!terminal->tty_state || terminal->tty_state->sigfd < 0) |
a529bc25 CB |
424 | return 0; |
425 | ||
2083d59d CB |
426 | ret = lxc_mainloop_add_handler(terminal->descr, terminal->tty_state->sigfd, |
427 | lxc_terminal_signalfd_cb, terminal->tty_state); | |
a529bc25 CB |
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 | ||
093bce5f | 436 | int lxc_terminal_mainloop_add(struct lxc_epoll_descr *descr, |
dcad02f8 | 437 | struct lxc_terminal *terminal) |
b5159817 | 438 | { |
a529bc25 | 439 | int ret; |
b5159817 | 440 | |
2083d59d CB |
441 | if (terminal->master < 0) { |
442 | INFO("Terminal is not initialized"); | |
b5159817 | 443 | return 0; |
596a818d DE |
444 | } |
445 | ||
2083d59d CB |
446 | ret = lxc_mainloop_add_handler(descr, terminal->master, |
447 | lxc_terminal_io_cb, terminal); | |
30a33fbd | 448 | if (ret < 0) { |
2083d59d | 449 | ERROR("Failed to add handler for %d to mainloop", terminal->master); |
b5159817 | 450 | return -1; |
28a4b0e5 DL |
451 | } |
452 | ||
30a33fbd | 453 | /* We cache the descr so that we can add an fd to it when someone |
c1ee47cd | 454 | * does attach to it in lxc_terminal_allocate(). |
b5159817 | 455 | */ |
2083d59d CB |
456 | terminal->descr = descr; |
457 | ret = lxc_terminal_mainloop_add_peer(terminal); | |
a529bc25 CB |
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 | |
dcad02f8 | 512 | static void lxc_terminal_peer_proxy_free(struct lxc_terminal *terminal) |
b5159817 | 513 | { |
2083d59d CB |
514 | if (terminal->tty_state) { |
515 | lxc_terminal_signal_fini(terminal->tty_state); | |
516 | terminal->tty_state = NULL; | |
b5159817 | 517 | } |
2083d59d CB |
518 | close(terminal->peerpty.master); |
519 | close(terminal->peerpty.slave); | |
520 | terminal->peerpty.master = -1; | |
521 | terminal->peerpty.slave = -1; | |
522 | terminal->peerpty.busy = -1; | |
523 | terminal->peerpty.name[0] = '\0'; | |
524 | terminal->peer = -1; | |
b5159817 | 525 | } |
596a818d | 526 | |
dcad02f8 | 527 | static int lxc_terminal_peer_proxy_alloc(struct lxc_terminal *terminal, int sockfd) |
b5159817 DE |
528 | { |
529 | struct termios oldtermio; | |
530 | struct lxc_tty_state *ts; | |
025ed0f3 | 531 | int ret; |
b5159817 | 532 | |
2083d59d CB |
533 | if (terminal->master < 0) { |
534 | ERROR("Terminal not set up"); | |
b5159817 DE |
535 | return -1; |
536 | } | |
2083d59d CB |
537 | if (terminal->peerpty.busy != -1 || terminal->peer != -1) { |
538 | NOTICE("Terminal already in use"); | |
b5159817 DE |
539 | return -1; |
540 | } | |
2083d59d CB |
541 | if (terminal->tty_state) { |
542 | ERROR("Terminal already has tty_state"); | |
b5159817 | 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 | */ | |
2083d59d CB |
549 | ret = openpty(&terminal->peerpty.master, &terminal->peerpty.slave, |
550 | terminal->peerpty.name, NULL, NULL); | |
025ed0f3 | 551 | if (ret) { |
b5159817 DE |
552 | SYSERROR("failed to create proxy pty"); |
553 | return -1; | |
554 | } | |
596a818d | 555 | |
2083d59d | 556 | if (lxc_setup_tios(terminal->peerpty.slave, &oldtermio) < 0) |
b5159817 DE |
557 | goto err1; |
558 | ||
2083d59d | 559 | ts = lxc_terminal_signal_init(terminal->peerpty.master, terminal->master); |
b5159817 DE |
560 | if (!ts) |
561 | goto err1; | |
562 | ||
2083d59d CB |
563 | terminal->tty_state = ts; |
564 | terminal->peer = terminal->peerpty.slave; | |
565 | terminal->peerpty.busy = sockfd; | |
566 | ret = lxc_terminal_mainloop_add_peer(terminal); | |
a529bc25 CB |
567 | if (ret < 0) |
568 | goto err1; | |
b5159817 | 569 | |
2083d59d | 570 | DEBUG("%d peermaster:%d sockfd:%d", lxc_raw_getpid(), terminal->peerpty.master, sockfd); |
b5159817 DE |
571 | return 0; |
572 | ||
573 | err1: | |
2083d59d | 574 | lxc_terminal_peer_proxy_free(terminal); |
63376d7d DL |
575 | return -1; |
576 | } | |
577 | ||
c1ee47cd | 578 | int lxc_terminal_allocate(struct lxc_conf *conf, int sockfd, int *ttyreq) |
b5159817 DE |
579 | { |
580 | int masterfd = -1, ttynum; | |
0e4be3cf | 581 | struct lxc_tty_info *ttys = &conf->ttys; |
dcad02f8 | 582 | struct lxc_terminal *terminal = &conf->console; |
b5159817 | 583 | |
b5159817 | 584 | if (*ttyreq == 0) { |
2083d59d | 585 | if (lxc_terminal_peer_proxy_alloc(terminal, sockfd) < 0) |
b5159817 | 586 | goto out; |
2083d59d | 587 | masterfd = terminal->peerpty.master; |
b5159817 DE |
588 | goto out; |
589 | } | |
590 | ||
591 | if (*ttyreq > 0) { | |
0e4be3cf | 592 | if (*ttyreq > ttys->nbtty) |
b5159817 DE |
593 | goto out; |
594 | ||
0e4be3cf | 595 | if (ttys->tty[*ttyreq - 1].busy) |
b5159817 DE |
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] */ | |
0e4be3cf | 604 | for (ttynum = 1; ttynum <= ttys->nbtty && ttys->tty[ttynum - 1].busy; ttynum++) |
0d4137cc | 605 | ; |
b5159817 DE |
606 | |
607 | /* we didn't find any available slot for tty */ | |
0e4be3cf | 608 | if (ttynum > ttys->nbtty) |
b5159817 DE |
609 | goto out; |
610 | ||
611 | *ttyreq = ttynum; | |
612 | ||
613 | out_tty: | |
0e4be3cf CB |
614 | ttys->tty[ttynum - 1].busy = sockfd; |
615 | masterfd = ttys->tty[ttynum - 1].master; | |
b5159817 | 616 | out: |
b5159817 DE |
617 | return masterfd; |
618 | } | |
619 | ||
3dfe6f8d | 620 | void lxc_terminal_free(struct lxc_conf *conf, int fd) |
63376d7d | 621 | { |
b5159817 | 622 | int i; |
0e4be3cf | 623 | struct lxc_tty_info *ttys = &conf->ttys; |
dcad02f8 | 624 | struct lxc_terminal *terminal = &conf->console; |
b5159817 | 625 | |
0e4be3cf CB |
626 | for (i = 0; i < ttys->nbtty; i++) { |
627 | if (ttys->tty[i].busy == fd) | |
628 | ttys->tty[i].busy = 0; | |
b5159817 DE |
629 | } |
630 | ||
2083d59d CB |
631 | if (terminal->peerpty.busy == fd) { |
632 | lxc_mainloop_del_handler(terminal->descr, terminal->peerpty.slave); | |
633 | lxc_terminal_peer_proxy_free(terminal); | |
b5159817 | 634 | } |
b5159817 DE |
635 | } |
636 | ||
dcad02f8 | 637 | static int lxc_terminal_peer_default(struct lxc_terminal *terminal) |
b5159817 DE |
638 | { |
639 | struct lxc_tty_state *ts; | |
2083d59d | 640 | const char *path = terminal->path; |
467c7ff3 CB |
641 | int fd; |
642 | int ret = 0; | |
b5159817 | 643 | |
2083d59d | 644 | /* If no terminal was given, try current controlling terminal, there |
467c7ff3 | 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 | |
2083d59d CB |
661 | terminal->peer = lxc_unpriv(open(path, O_RDWR | O_CLOEXEC)); |
662 | if (terminal->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 | |
2083d59d | 668 | if (!isatty(terminal->peer)) { |
467c7ff3 CB |
669 | ERROR("file descriptor for file \"%s\" does not refer to a tty device", path); |
670 | goto on_error1; | |
671 | } | |
b5159817 | 672 | |
2083d59d CB |
673 | ts = lxc_terminal_signal_init(terminal->peer, terminal->master); |
674 | terminal->tty_state = ts; | |
341c2aed | 675 | if (!ts) { |
0519b5cc | 676 | WARN("Failed to install signal handler"); |
467c7ff3 | 677 | goto on_error1; |
341c2aed | 678 | } |
b5159817 | 679 | |
2083d59d | 680 | lxc_terminal_winsz(terminal->peer, terminal->master); |
b5159817 | 681 | |
2083d59d CB |
682 | terminal->tios = malloc(sizeof(*terminal->tios)); |
683 | if (!terminal->tios) { | |
b5159817 | 684 | SYSERROR("failed to allocate memory"); |
467c7ff3 | 685 | goto on_error1; |
b5159817 DE |
686 | } |
687 | ||
2083d59d | 688 | if (lxc_setup_tios(terminal->peer, terminal->tios) < 0) |
467c7ff3 CB |
689 | goto on_error2; |
690 | else | |
691 | goto out; | |
b5159817 | 692 | |
467c7ff3 | 693 | on_error2: |
2083d59d CB |
694 | free(terminal->tios); |
695 | terminal->tios = NULL; | |
467c7ff3 CB |
696 | |
697 | on_error1: | |
2083d59d CB |
698 | close(terminal->peer); |
699 | terminal->peer = -1; | |
467c7ff3 CB |
700 | ret = -ENOTTY; |
701 | ||
b5159817 | 702 | out: |
467c7ff3 | 703 | return ret; |
b5159817 DE |
704 | } |
705 | ||
dcad02f8 | 706 | int lxc_terminal_write_ringbuffer(struct lxc_terminal *terminal) |
39c6cdb7 CB |
707 | { |
708 | char *r_addr; | |
709 | ssize_t ret; | |
710 | uint64_t used; | |
2083d59d | 711 | struct lxc_ringbuf *buf = &terminal->ringbuf; |
39c6cdb7 CB |
712 | |
713 | /* There's not log file where we can dump the ringbuffer to. */ | |
2083d59d | 714 | if (terminal->log_fd < 0) |
39c6cdb7 CB |
715 | return 0; |
716 | ||
39c6cdb7 CB |
717 | used = lxc_ringbuf_used(buf); |
718 | if (used == 0) | |
719 | return 0; | |
720 | ||
2083d59d | 721 | ret = lxc_terminal_truncate_log_file(terminal); |
39c6cdb7 CB |
722 | if (ret < 0) |
723 | return ret; | |
724 | ||
725 | /* Write as much as we can without exceeding the limit. */ | |
2083d59d CB |
726 | if (terminal->log_size < used) |
727 | used = terminal->log_size; | |
39c6cdb7 CB |
728 | |
729 | r_addr = lxc_ringbuf_get_read_addr(buf); | |
2083d59d | 730 | ret = lxc_write_nointr(terminal->log_fd, r_addr, used); |
39c6cdb7 CB |
731 | if (ret < 0) |
732 | return -EIO; | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
dcad02f8 | 737 | void lxc_terminal_delete(struct lxc_terminal *terminal) |
b5159817 | 738 | { |
69629c82 CB |
739 | int ret; |
740 | ||
2083d59d | 741 | ret = lxc_terminal_write_ringbuffer(terminal); |
39c6cdb7 | 742 | if (ret < 0) |
2083d59d | 743 | WARN("Failed to write terminal log to disk"); |
39c6cdb7 | 744 | |
2083d59d CB |
745 | if (terminal->tios && terminal->peer >= 0) { |
746 | ret = tcsetattr(terminal->peer, TCSAFLUSH, terminal->tios); | |
69629c82 CB |
747 | if (ret < 0) |
748 | WARN("%s - Failed to set old terminal settings", strerror(errno)); | |
749 | } | |
2083d59d CB |
750 | free(terminal->tios); |
751 | terminal->tios = NULL; | |
596a818d | 752 | |
2083d59d CB |
753 | if (terminal->peer >= 0) |
754 | close(terminal->peer); | |
755 | terminal->peer = -1; | |
bc9724f7 | 756 | |
2083d59d CB |
757 | if (terminal->master >= 0) |
758 | close(terminal->master); | |
759 | terminal->master = -1; | |
bc9724f7 | 760 | |
2083d59d CB |
761 | if (terminal->slave >= 0) |
762 | close(terminal->slave); | |
763 | terminal->slave = -1; | |
bc9724f7 | 764 | |
2083d59d CB |
765 | if (terminal->log_fd >= 0) |
766 | close(terminal->log_fd); | |
767 | terminal->log_fd = -1; | |
63376d7d DL |
768 | } |
769 | ||
3b988b33 CB |
770 | /** |
771 | * Note that this function needs to run before the mainloop starts. Since we | |
2083d59d CB |
772 | * register a handler for the terminal's masterfd when we create the mainloop |
773 | * the terminal handler needs to see an allocated ringbuffer. | |
3b988b33 | 774 | */ |
dcad02f8 | 775 | static int lxc_terminal_create_ringbuf(struct lxc_terminal *terminal) |
3b988b33 CB |
776 | { |
777 | int ret; | |
2083d59d CB |
778 | struct lxc_ringbuf *buf = &terminal->ringbuf; |
779 | uint64_t size = terminal->buffer_size; | |
3b988b33 CB |
780 | |
781 | /* no ringbuffer previously allocated and no ringbuffer requested */ | |
782 | if (!buf->addr && size <= 0) | |
783 | return 0; | |
784 | ||
785 | /* ringbuffer allocated but no new ringbuffer requested */ | |
786 | if (buf->addr && size <= 0) { | |
787 | lxc_ringbuf_release(buf); | |
788 | buf->addr = NULL; | |
789 | buf->r_off = 0; | |
790 | buf->w_off = 0; | |
791 | buf->size = 0; | |
2083d59d | 792 | TRACE("Deallocated terminal ringbuffer"); |
3b988b33 CB |
793 | return 0; |
794 | } | |
795 | ||
796 | if (size <= 0) | |
797 | return 0; | |
798 | ||
799 | /* check wether the requested size for the ringbuffer has changed */ | |
800 | if (buf->addr && buf->size != size) { | |
2083d59d CB |
801 | TRACE("Terminal ringbuffer size changed from %" PRIu64 |
802 | " to %" PRIu64 " bytes. Deallocating terminal ringbuffer", | |
3b988b33 CB |
803 | buf->size, size); |
804 | lxc_ringbuf_release(buf); | |
805 | } | |
806 | ||
807 | ret = lxc_ringbuf_create(buf, size); | |
808 | if (ret < 0) { | |
2083d59d | 809 | ERROR("Failed to setup %" PRIu64 " byte terminal ringbuffer", size); |
3b988b33 CB |
810 | return -1; |
811 | } | |
812 | ||
2083d59d | 813 | TRACE("Allocated %" PRIu64 " byte terminal ringbuffer", size); |
3b988b33 CB |
814 | return 0; |
815 | } | |
816 | ||
a0309168 | 817 | /** |
2083d59d CB |
818 | * This is the terminal log file. Please note that the terminal log file is |
819 | * (implementation wise not content wise) independent of the terminal ringbuffer. | |
a0309168 | 820 | */ |
dcad02f8 | 821 | int lxc_terminal_create_log_file(struct lxc_terminal *terminal) |
a0309168 | 822 | { |
2083d59d | 823 | if (!terminal->log_path) |
a0309168 CB |
824 | return 0; |
825 | ||
2083d59d CB |
826 | terminal->log_fd = lxc_unpriv(open(terminal->log_path, O_CLOEXEC | O_RDWR | O_CREAT | O_APPEND, 0600)); |
827 | if (terminal->log_fd < 0) { | |
828 | SYSERROR("Failed to open terminal log file \"%s\"", terminal->log_path); | |
a0309168 CB |
829 | return -1; |
830 | } | |
831 | ||
2083d59d | 832 | DEBUG("Using \"%s\" as terminal log file", terminal->log_path); |
a0309168 CB |
833 | return 0; |
834 | } | |
835 | ||
dcad02f8 | 836 | int lxc_terminal_create(struct lxc_terminal *terminal) |
63376d7d | 837 | { |
69629c82 | 838 | int ret, saved_errno; |
b5159817 | 839 | |
2083d59d | 840 | ret = openpty(&terminal->master, &terminal->slave, terminal->name, NULL, |
5777fe90 | 841 | NULL); |
69629c82 | 842 | saved_errno = errno; |
467c7ff3 | 843 | if (ret < 0) { |
69629c82 | 844 | ERROR("%s - Failed to allocate a pty", strerror(saved_errno)); |
b5159817 DE |
845 | return -1; |
846 | } | |
847 | ||
2083d59d | 848 | ret = fcntl(terminal->master, F_SETFD, FD_CLOEXEC); |
69629c82 | 849 | if (ret < 0) { |
2083d59d | 850 | SYSERROR("Failed to set FD_CLOEXEC flag on terminal master"); |
b5159817 DE |
851 | goto err; |
852 | } | |
853 | ||
2083d59d | 854 | ret = fcntl(terminal->slave, F_SETFD, FD_CLOEXEC); |
69629c82 | 855 | if (ret < 0) { |
2083d59d | 856 | SYSERROR("Failed to set FD_CLOEXEC flag on terminal slave"); |
b5159817 DE |
857 | goto err; |
858 | } | |
859 | ||
2083d59d | 860 | ret = lxc_terminal_peer_default(terminal); |
467c7ff3 | 861 | if (ret < 0) { |
69629c82 | 862 | ERROR("Failed to allocate a peer pty device"); |
467c7ff3 CB |
863 | goto err; |
864 | } | |
b5159817 | 865 | |
5777fe90 CB |
866 | return 0; |
867 | ||
868 | err: | |
2083d59d | 869 | lxc_terminal_delete(terminal); |
5777fe90 CB |
870 | return -ENODEV; |
871 | } | |
872 | ||
564e31c4 | 873 | int lxc_terminal_setup(struct lxc_conf *conf) |
5777fe90 CB |
874 | { |
875 | int ret; | |
dcad02f8 | 876 | struct lxc_terminal *terminal = &conf->console; |
5777fe90 | 877 | |
2083d59d CB |
878 | if (terminal->path && !strcmp(terminal->path, "none")) { |
879 | INFO("No terminal was requested"); | |
5777fe90 CB |
880 | return 0; |
881 | } | |
882 | ||
96eee564 | 883 | ret = lxc_terminal_create(terminal); |
5777fe90 CB |
884 | if (ret < 0) |
885 | return -1; | |
886 | ||
2083d59d CB |
887 | /* create terminal log file */ |
888 | ret = lxc_terminal_create_log_file(terminal); | |
a0309168 CB |
889 | if (ret < 0) |
890 | goto err; | |
891 | ||
2083d59d CB |
892 | /* create terminal ringbuffer */ |
893 | ret = lxc_terminal_create_ringbuf(terminal); | |
a0309168 CB |
894 | if (ret < 0) |
895 | goto err; | |
b5159817 DE |
896 | |
897 | return 0; | |
898 | ||
899 | err: | |
2083d59d | 900 | lxc_terminal_delete(terminal); |
69629c82 | 901 | return -ENODEV; |
b5159817 DE |
902 | } |
903 | ||
ae6d3913 | 904 | int lxc_terminal_set_stdfds(int fd) |
0d9acb99 | 905 | { |
39a78bbe | 906 | if (fd < 0) |
0d9acb99 | 907 | return 0; |
b5159817 | 908 | |
39a78bbe CB |
909 | if (isatty(STDIN_FILENO)) |
910 | if (dup2(fd, STDIN_FILENO) < 0) { | |
911 | SYSERROR("failed to duplicate stdin."); | |
912 | return -1; | |
913 | } | |
914 | ||
915 | if (isatty(STDOUT_FILENO)) | |
916 | if (dup2(fd, STDOUT_FILENO) < 0) { | |
917 | SYSERROR("failed to duplicate stdout."); | |
918 | return -1; | |
919 | } | |
920 | ||
921 | if (isatty(STDERR_FILENO)) | |
922 | if (dup2(fd, STDERR_FILENO) < 0) { | |
923 | SYSERROR("failed to duplicate stderr."); | |
924 | return -1; | |
925 | } | |
926 | ||
0d9acb99 DE |
927 | return 0; |
928 | } | |
b5159817 | 929 | |
52f9292f CB |
930 | int lxc_terminal_stdin_cb(int fd, uint32_t events, void *cbdata, |
931 | struct lxc_epoll_descr *descr) | |
b5159817 DE |
932 | { |
933 | struct lxc_tty_state *ts = cbdata; | |
934 | char c; | |
935 | ||
97bc2422 | 936 | if (fd != ts->stdinfd) |
a529bc25 | 937 | return LXC_MAINLOOP_CLOSE; |
97bc2422 | 938 | |
e66b6c96 | 939 | if (lxc_read_nointr(ts->stdinfd, &c, 1) <= 0) |
a529bc25 | 940 | return LXC_MAINLOOP_CLOSE; |
63376d7d | 941 | |
525e2117 | 942 | if (ts->escape >= 1) { |
2083d59d | 943 | /* we want to exit the terminal with Ctrl+a q */ |
014d5e1e CB |
944 | if (c == ts->escape && !ts->saw_escape) { |
945 | ts->saw_escape = 1; | |
946 | return 0; | |
947 | } | |
5c294060 | 948 | |
014d5e1e | 949 | if (c == 'q' && ts->saw_escape) |
a529bc25 | 950 | return LXC_MAINLOOP_CLOSE; |
014d5e1e CB |
951 | |
952 | ts->saw_escape = 0; | |
953 | } | |
63376d7d | 954 | |
e66b6c96 | 955 | if (lxc_write_nointr(ts->masterfd, &c, 1) <= 0) |
a529bc25 | 956 | return LXC_MAINLOOP_CLOSE; |
b5159817 | 957 | |
63376d7d DL |
958 | return 0; |
959 | } | |
960 | ||
ee9102ff CB |
961 | int lxc_terminal_master_cb(int fd, uint32_t events, void *cbdata, |
962 | struct lxc_epoll_descr *descr) | |
63376d7d | 963 | { |
b5159817 | 964 | struct lxc_tty_state *ts = cbdata; |
de708fb7 | 965 | char buf[LXC_TERMINAL_BUFFER_SIZE]; |
0d4137cc | 966 | int r, w; |
63376d7d | 967 | |
97bc2422 | 968 | if (fd != ts->masterfd) |
a529bc25 | 969 | return LXC_MAINLOOP_CLOSE; |
97bc2422 | 970 | |
e66b6c96 CB |
971 | r = lxc_read_nointr(fd, buf, sizeof(buf)); |
972 | if (r <= 0) | |
a529bc25 | 973 | return LXC_MAINLOOP_CLOSE; |
1560f6c9 | 974 | |
e66b6c96 CB |
975 | w = lxc_write_nointr(ts->stdoutfd, buf, r); |
976 | if (w <= 0) { | |
a529bc25 | 977 | return LXC_MAINLOOP_CLOSE; |
e66b6c96 | 978 | } else if (w != r) { |
a529bc25 | 979 | SYSERROR("Failed to write"); |
b5159817 | 980 | return 1; |
f78a1f32 DL |
981 | } |
982 | ||
b5159817 DE |
983 | return 0; |
984 | } | |
985 | ||
c86e2584 | 986 | int lxc_terminal_getfd(struct lxc_container *c, int *ttynum, int *masterfd) |
b5159817 DE |
987 | { |
988 | return lxc_cmd_console(c->name, ttynum, masterfd, c->config_path); | |
989 | } | |
990 | ||
991 | int lxc_console(struct lxc_container *c, int ttynum, | |
992 | int stdinfd, int stdoutfd, int stderrfd, | |
993 | int escape) | |
994 | { | |
995 | int ret, ttyfd, masterfd; | |
996 | struct lxc_epoll_descr descr; | |
997 | struct termios oldtios; | |
998 | struct lxc_tty_state *ts; | |
25964232 | 999 | int istty = 0; |
b5159817 | 1000 | |
b5159817 | 1001 | ttyfd = lxc_cmd_console(c->name, &ttynum, &masterfd, c->config_path); |
6834f805 CB |
1002 | if (ttyfd < 0) |
1003 | return -1; | |
b5159817 DE |
1004 | |
1005 | ret = setsid(); | |
33b4b411 CB |
1006 | if (ret < 0) |
1007 | TRACE("Process is already group leader"); | |
b5159817 | 1008 | |
dc8c7883 | 1009 | ts = lxc_terminal_signal_init(stdinfd, masterfd); |
b5159817 DE |
1010 | if (!ts) { |
1011 | ret = -1; | |
33b4b411 | 1012 | goto close_fds; |
b5159817 DE |
1013 | } |
1014 | ts->escape = escape; | |
1015 | ts->winch_proxy = c->name; | |
1016 | ts->winch_proxy_lxcpath = c->config_path; | |
3b975060 | 1017 | ts->stdoutfd = stdoutfd; |
b5159817 | 1018 | |
6834f805 | 1019 | istty = isatty(stdinfd); |
25964232 | 1020 | if (istty) { |
4e9c0330 | 1021 | lxc_terminal_winsz(stdinfd, masterfd); |
8ccbbf94 | 1022 | lxc_cmd_terminal_winch(ts->winch_proxy, ts->winch_proxy_lxcpath); |
6834f805 CB |
1023 | } else { |
1024 | INFO("File descriptor %d does not refer to a tty device", stdinfd); | |
25964232 | 1025 | } |
b5159817 DE |
1026 | |
1027 | ret = lxc_mainloop_open(&descr); | |
1028 | if (ret) { | |
33b4b411 CB |
1029 | ERROR("Failed to create mainloop"); |
1030 | goto sigwinch_fini; | |
b5159817 DE |
1031 | } |
1032 | ||
341c2aed CB |
1033 | if (ts->sigfd != -1) { |
1034 | ret = lxc_mainloop_add_handler(&descr, ts->sigfd, | |
9bafc8cb | 1035 | lxc_terminal_signalfd_cb, ts); |
33b4b411 | 1036 | if (ret < 0) { |
0519b5cc | 1037 | ERROR("Failed to add signal handler to mainloop"); |
33b4b411 | 1038 | goto close_mainloop; |
341c2aed | 1039 | } |
b5159817 DE |
1040 | } |
1041 | ||
1042 | ret = lxc_mainloop_add_handler(&descr, ts->stdinfd, | |
52f9292f | 1043 | lxc_terminal_stdin_cb, ts); |
33b4b411 CB |
1044 | if (ret < 0) { |
1045 | ERROR("Failed to add stdin handler"); | |
1046 | goto close_mainloop; | |
b5159817 DE |
1047 | } |
1048 | ||
1049 | ret = lxc_mainloop_add_handler(&descr, ts->masterfd, | |
ee9102ff | 1050 | lxc_terminal_master_cb, ts); |
33b4b411 CB |
1051 | if (ret < 0) { |
1052 | ERROR("Failed to add master handler"); | |
1053 | goto close_mainloop; | |
b5159817 DE |
1054 | } |
1055 | ||
686df166 CB |
1056 | if (ts->escape >= 1) { |
1057 | fprintf(stderr, | |
1058 | "\n" | |
6834f805 CB |
1059 | "Connected to tty %1$d\n" |
1060 | "Type <Ctrl+%2$c q> to exit the console, " | |
1061 | "<Ctrl+%2$c Ctrl+%2$c> to enter Ctrl+%2$c itself\n", | |
1062 | ttynum, 'a' + escape - 1); | |
686df166 | 1063 | } |
6834f805 CB |
1064 | |
1065 | if (istty) { | |
1066 | ret = lxc_setup_tios(stdinfd, &oldtios); | |
1067 | if (ret < 0) | |
1068 | goto close_mainloop; | |
1069 | } | |
1070 | ||
025ed0f3 | 1071 | ret = lxc_mainloop(&descr, -1); |
33b4b411 CB |
1072 | if (ret < 0) { |
1073 | ERROR("The mainloop returned an error"); | |
6834f805 | 1074 | goto restore_tios; |
b5159817 DE |
1075 | } |
1076 | ||
1077 | ret = 0; | |
1078 | ||
6834f805 CB |
1079 | restore_tios: |
1080 | if (istty) { | |
1081 | istty = tcsetattr(stdinfd, TCSAFLUSH, &oldtios); | |
1082 | if (istty < 0) | |
1083 | WARN("%s - Failed to restore terminal properties", | |
1084 | strerror(errno)); | |
1085 | } | |
1086 | ||
33b4b411 | 1087 | close_mainloop: |
b5159817 | 1088 | lxc_mainloop_close(&descr); |
33b4b411 CB |
1089 | |
1090 | sigwinch_fini: | |
a8867251 | 1091 | lxc_terminal_signal_fini(ts); |
33b4b411 CB |
1092 | |
1093 | close_fds: | |
b5159817 DE |
1094 | close(masterfd); |
1095 | close(ttyfd); | |
33b4b411 | 1096 | |
b5159817 | 1097 | return ret; |
63376d7d | 1098 | } |
e98affda CB |
1099 | |
1100 | int lxc_make_controlling_pty(int fd) | |
1101 | { | |
1102 | int ret; | |
1103 | ||
1104 | setsid(); | |
1105 | ||
1106 | ret = ioctl(fd, TIOCSCTTY, (char *)NULL); | |
1107 | if (ret < 0) | |
1108 | return -1; | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | int lxc_login_pty(int fd) | |
1114 | { | |
1115 | int ret; | |
1116 | ||
1117 | ret = lxc_make_controlling_pty(fd); | |
1118 | if (ret < 0) | |
1119 | return -1; | |
1120 | ||
ae6d3913 | 1121 | ret = lxc_terminal_set_stdfds(fd); |
e98affda CB |
1122 | if (ret < 0) |
1123 | return -1; | |
1124 | ||
1125 | if (fd > STDERR_FILENO) | |
1126 | close(fd); | |
1127 | ||
1128 | return 0; | |
1129 | } | |
1130 | ||
99a04585 | 1131 | void lxc_terminal_info_init(struct lxc_terminal_info *pty) |
e98affda CB |
1132 | { |
1133 | pty->name[0] = '\0'; | |
1134 | pty->master = -EBADF; | |
1135 | pty->slave = -EBADF; | |
1136 | pty->busy = -1; | |
1137 | } | |
1138 | ||
dcad02f8 | 1139 | void lxc_terminal_init(struct lxc_terminal *pty) |
e98affda CB |
1140 | { |
1141 | memset(pty, 0, sizeof(*pty)); | |
1142 | pty->slave = -EBADF; | |
1143 | pty->master = -EBADF; | |
1144 | pty->peer = -EBADF; | |
1145 | pty->log_fd = -EBADF; | |
780a7c82 | 1146 | lxc_terminal_info_init(&pty->peerpty); |
e98affda CB |
1147 | } |
1148 | ||
dcad02f8 | 1149 | void lxc_terminal_conf_free(struct lxc_terminal *terminal) |
e98affda | 1150 | { |
2083d59d CB |
1151 | free(terminal->log_path); |
1152 | free(terminal->path); | |
1153 | if (terminal->buffer_size > 0 && terminal->ringbuf.addr) | |
1154 | lxc_ringbuf_release(&terminal->ringbuf); | |
e98affda | 1155 | } |
7cfeddd7 | 1156 | |
dcad02f8 | 1157 | int lxc_terminal_map_ids(struct lxc_conf *c, struct lxc_terminal *pty) |
7cfeddd7 CB |
1158 | { |
1159 | int ret; | |
1160 | ||
1161 | if (lxc_list_empty(&c->id_map)) | |
1162 | return 0; | |
1163 | ||
1164 | ret = strcmp(pty->name, ""); | |
1165 | if (ret == 0) | |
1166 | return 0; | |
1167 | ||
1168 | ret = chown_mapped_root(pty->name, c); | |
1169 | if (ret < 0) { | |
1170 | ERROR("Failed to chown \"%s\"", pty->name); | |
1171 | return -1; | |
1172 | } | |
1173 | ||
1174 | TRACE("Chowned \"%s\"", pty->name); | |
1175 | ||
1176 | return 0; | |
1177 | } |