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fd37ccaf MT |
1 | /*############################################################################# |
2 | # # | |
3 | # Pakfire - The IPFire package management system # | |
4 | # Copyright (C) 2022 Pakfire development team # | |
5 | # # | |
6 | # This program is free software: you can redistribute it and/or modify # | |
7 | # it under the terms of the GNU General Public License as published by # | |
8 | # the Free Software Foundation, either version 3 of the License, or # | |
9 | # (at your option) any later version. # | |
10 | # # | |
11 | # This program is distributed in the hope that it will be useful, # | |
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
14 | # GNU General Public License for more details. # | |
15 | # # | |
16 | # You should have received a copy of the GNU General Public License # | |
17 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
18 | # # | |
19 | #############################################################################*/ | |
20 | ||
32d5f21d | 21 | #include <errno.h> |
bcf09bf5 | 22 | #include <fcntl.h> |
980b15af | 23 | #include <linux/capability.h> |
0bd84dc1 | 24 | #include <linux/sched.h> |
58ee649f | 25 | #include <sys/wait.h> |
4f23b498 | 26 | #include <linux/wait.h> |
0bd84dc1 MT |
27 | #include <sched.h> |
28 | #include <signal.h> | |
32d5f21d | 29 | #include <stdlib.h> |
0bd84dc1 | 30 | #include <syscall.h> |
980b15af | 31 | #include <sys/capability.h> |
616f1fca | 32 | #include <sys/epoll.h> |
43dc0e16 | 33 | #include <sys/eventfd.h> |
7bdf1d8e | 34 | #include <sys/mount.h> |
90d92b5c | 35 | #include <sys/personality.h> |
980b15af | 36 | #include <sys/prctl.h> |
cf440db8 | 37 | #include <sys/resource.h> |
335b8a44 | 38 | #include <sys/timerfd.h> |
0bd84dc1 MT |
39 | #include <sys/types.h> |
40 | #include <sys/wait.h> | |
c40722e3 | 41 | #include <termios.h> |
32d5f21d | 42 | |
fec79a33 MT |
43 | // libnl3 |
44 | #include <net/if.h> | |
45 | #include <netlink/route/link.h> | |
46 | ||
739d5b57 MT |
47 | // libseccomp |
48 | #include <seccomp.h> | |
49 | ||
ae5201c5 MT |
50 | // libuuid |
51 | #include <uuid.h> | |
52 | ||
517708c8 MT |
53 | // Enable legacy logging |
54 | #define PAKFIRE_LEGACY_LOGGING | |
55 | ||
90d92b5c | 56 | #include <pakfire/arch.h> |
e3ddb498 | 57 | #include <pakfire/cgroup.h> |
fd37ccaf | 58 | #include <pakfire/jail.h> |
4f59c39b MT |
59 | #include <pakfire/logging.h> |
60 | #include <pakfire/mount.h> | |
fd37ccaf | 61 | #include <pakfire/pakfire.h> |
729827f7 | 62 | #include <pakfire/path.h> |
6ce56f90 | 63 | #include <pakfire/private.h> |
4896e62c | 64 | #include <pakfire/pwd.h> |
d973a13d | 65 | #include <pakfire/string.h> |
32d5f21d MT |
66 | #include <pakfire/util.h> |
67 | ||
616f1fca MT |
68 | #define BUFFER_SIZE 1024 * 64 |
69 | #define ENVIRON_SIZE 128 | |
70 | #define EPOLL_MAX_EVENTS 2 | |
cc6e2264 | 71 | #define MAX_MOUNTPOINTS 8 |
fd37ccaf | 72 | |
d5bc8fe0 MT |
73 | // The default environment that will be set for every command |
74 | static const struct environ { | |
75 | const char* key; | |
76 | const char* val; | |
77 | } ENV[] = { | |
fbe95cdf | 78 | { "HOME", "/root" }, |
55f54757 | 79 | { "LANG", "C.utf-8" }, |
a7ad6d4f | 80 | { "PATH", "/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin", }, |
d5bc8fe0 | 81 | { "TERM", "vt100" }, |
3bf01105 MT |
82 | |
83 | // Tell everything that it is running inside a Pakfire container | |
84 | { "container", "pakfire" }, | |
d5bc8fe0 MT |
85 | { NULL, NULL }, |
86 | }; | |
87 | ||
dcdda292 MT |
88 | struct pakfire_log_buffer { |
89 | char data[BUFFER_SIZE]; | |
90 | size_t used; | |
1a7eb888 | 91 | int priority; |
dcdda292 MT |
92 | }; |
93 | ||
6ce285a1 | 94 | enum pakfire_jail_pty_io { |
dcdda292 MT |
95 | PAKFIRE_JAIL_PTY_READY_TO_READ = (1 << 0), |
96 | PAKFIRE_JAIL_PTY_READY_TO_WRITE = (1 << 1), | |
97 | }; | |
98 | ||
99 | struct pakfire_jail_pty_stdio { | |
100 | // File Descriptor | |
101 | int fd; | |
102 | ||
103 | // Buffer | |
104 | struct pakfire_log_buffer buffer; | |
105 | ||
106 | // Terminal Attributes | |
107 | struct termios attrs; | |
108 | ||
109 | // File Descriptor Flags | |
6ce285a1 | 110 | int flags; |
dcdda292 MT |
111 | |
112 | // IO Flags | |
6ce285a1 | 113 | enum pakfire_jail_pty_io io; |
dcdda292 MT |
114 | }; |
115 | ||
cc6e2264 MT |
116 | struct pakfire_jail_mountpoint { |
117 | char source[PATH_MAX]; | |
118 | char target[PATH_MAX]; | |
119 | int flags; | |
120 | }; | |
121 | ||
fd37ccaf | 122 | struct pakfire_jail { |
a13df023 | 123 | struct pakfire_ctx* ctx; |
fd37ccaf MT |
124 | struct pakfire* pakfire; |
125 | int nrefs; | |
32d5f21d | 126 | |
ae5201c5 MT |
127 | // A unique ID for each jail |
128 | uuid_t uuid; | |
129 | char __uuid[UUID_STR_LEN]; | |
130 | ||
cf440db8 MT |
131 | // Resource Limits |
132 | int nice; | |
133 | ||
335b8a44 MT |
134 | // Timeout |
135 | struct itimerspec timeout; | |
136 | ||
15503538 MT |
137 | // CGroup |
138 | struct pakfire_cgroup* cgroup; | |
139 | ||
32d5f21d MT |
140 | // Environment |
141 | char* env[ENVIRON_SIZE]; | |
616f1fca | 142 | |
d8b94dd5 MT |
143 | struct pakfire_jail_callbacks { |
144 | // Standard Input | |
145 | struct pakfire_jail_callbacks_stdin { | |
146 | pakfire_jail_stdin_callback callback; | |
147 | void* data; | |
148 | } stdin; | |
149 | ||
150 | // Standard Output | |
151 | struct pakfire_jail_callbacks_stdout { | |
152 | pakfire_jail_stdout_callback callback; | |
153 | void* data; | |
154 | } stdout; | |
155 | } callbacks; | |
156 | ||
cc6e2264 MT |
157 | // Mountpoints |
158 | struct pakfire_jail_mountpoint mountpoints[MAX_MOUNTPOINTS]; | |
159 | unsigned int num_mountpoints; | |
616f1fca MT |
160 | }; |
161 | ||
616f1fca | 162 | struct pakfire_jail_exec { |
7bdf1d8e MT |
163 | int flags; |
164 | ||
f949feac MT |
165 | // PID (of the child) |
166 | pid_t pid; | |
167 | int pidfd; | |
616f1fca | 168 | |
8f49d254 MT |
169 | // Socket to pass FDs |
170 | int socket[2]; | |
171 | ||
f949feac MT |
172 | // Process status (from waitid) |
173 | siginfo_t status; | |
616f1fca | 174 | |
f7d240a7 MT |
175 | // FD to notify the client that the parent has finished initialization |
176 | int completed_fd; | |
177 | ||
616f1fca | 178 | // Log pipes |
e33387d3 | 179 | struct pakfire_jail_pipes { |
e33387d3 MT |
180 | // Logging |
181 | int log_INFO[2]; | |
182 | int log_ERROR[2]; | |
6ac51607 | 183 | #ifdef ENABLE_DEBUG |
e33387d3 | 184 | int log_DEBUG[2]; |
6ac51607 | 185 | #endif /* ENABLE_DEBUG */ |
616f1fca MT |
186 | } pipes; |
187 | ||
188 | // Log buffers | |
e33387d3 | 189 | struct pakfire_jail_buffers { |
e33387d3 MT |
190 | // Logging |
191 | struct pakfire_log_buffer log_INFO; | |
192 | struct pakfire_log_buffer log_ERROR; | |
6ac51607 | 193 | #ifdef ENABLE_DEBUG |
e33387d3 | 194 | struct pakfire_log_buffer log_DEBUG; |
6ac51607 | 195 | #endif /* ENABLE_DEBUG */ |
616f1fca | 196 | } buffers; |
aca565fc MT |
197 | |
198 | struct pakfire_cgroup* cgroup; | |
6b7cf275 | 199 | struct pakfire_cgroup_stats cgroup_stats; |
374e6268 | 200 | |
c40722e3 MT |
201 | // PTY |
202 | struct pakfire_jail_pty { | |
203 | // The path to the console | |
204 | char console[PATH_MAX]; | |
205 | ||
dcdda292 | 206 | // The master device |
c40722e3 MT |
207 | struct pakfire_jail_pty_master { |
208 | int fd; | |
6ce285a1 | 209 | enum pakfire_jail_pty_io io; |
dcdda292 | 210 | } master; |
c40722e3 | 211 | |
dcdda292 MT |
212 | // Standard Input/Output |
213 | struct pakfire_jail_pty_stdio stdin; | |
c40722e3 MT |
214 | struct pakfire_jail_pty_stdio stdout; |
215 | } pty; | |
fd37ccaf MT |
216 | }; |
217 | ||
0bd84dc1 MT |
218 | static int clone3(struct clone_args* args, size_t size) { |
219 | return syscall(__NR_clone3, args, size); | |
220 | } | |
221 | ||
335b8a44 MT |
222 | static int pidfd_send_signal(int pidfd, int sig, siginfo_t* info, unsigned int flags) { |
223 | return syscall(SYS_pidfd_send_signal, pidfd, sig, info, flags); | |
224 | } | |
225 | ||
14df7388 MT |
226 | static int pivot_root(const char* new_root, const char* old_root) { |
227 | return syscall(SYS_pivot_root, new_root, old_root); | |
228 | } | |
229 | ||
7bdf1d8e MT |
230 | static int pakfire_jail_exec_has_flag( |
231 | const struct pakfire_jail_exec* ctx, const enum pakfire_jail_exec_flags flag) { | |
232 | return ctx->flags & flag; | |
233 | } | |
234 | ||
d5bc8fe0 MT |
235 | static void pakfire_jail_free(struct pakfire_jail* jail) { |
236 | DEBUG(jail->pakfire, "Freeing jail at %p\n", jail); | |
237 | ||
238 | // Free environment | |
239 | for (unsigned int i = 0; jail->env[i]; i++) | |
240 | free(jail->env[i]); | |
241 | ||
d34b1e00 MT |
242 | if (jail->cgroup) |
243 | pakfire_cgroup_unref(jail->cgroup); | |
a13df023 MT |
244 | if (jail->pakfire) |
245 | pakfire_unref(jail->pakfire); | |
246 | if (jail->ctx) | |
247 | pakfire_ctx_unref(jail->ctx); | |
d5bc8fe0 MT |
248 | free(jail); |
249 | } | |
250 | ||
3bf01105 MT |
251 | static const char* pakfire_jail_uuid(struct pakfire_jail* jail) { |
252 | if (!*jail->__uuid) | |
253 | uuid_unparse_lower(jail->uuid, jail->__uuid); | |
254 | ||
255 | return jail->__uuid; | |
256 | } | |
257 | ||
00ba1d9a MT |
258 | static int pakfire_jail_setup_interactive_env(struct pakfire_jail* jail) { |
259 | // Set PS1 | |
260 | int r = pakfire_jail_set_env(jail, "PS1", "pakfire-jail \\w> "); | |
261 | if (r) | |
262 | return r; | |
263 | ||
264 | // Copy TERM | |
265 | char* TERM = secure_getenv("TERM"); | |
266 | if (TERM) { | |
267 | r = pakfire_jail_set_env(jail, "TERM", TERM); | |
268 | if (r) | |
269 | return r; | |
270 | } | |
271 | ||
272 | // Copy LANG | |
273 | char* LANG = secure_getenv("LANG"); | |
274 | if (LANG) { | |
275 | r = pakfire_jail_set_env(jail, "LANG", LANG); | |
276 | if (r) | |
277 | return r; | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
9fa1afb6 | 283 | PAKFIRE_EXPORT int pakfire_jail_create(struct pakfire_jail** jail, struct pakfire* pakfire) { |
d5bc8fe0 MT |
284 | int r; |
285 | ||
652f2a99 | 286 | const char* arch = pakfire_get_effective_arch(pakfire); |
aac86bd3 | 287 | |
d5bc8fe0 | 288 | // Allocate a new jail |
fd37ccaf MT |
289 | struct pakfire_jail* j = calloc(1, sizeof(*j)); |
290 | if (!j) | |
291 | return 1; | |
292 | ||
a13df023 MT |
293 | // Reference context |
294 | j->ctx = pakfire_ctx(pakfire); | |
295 | ||
fd37ccaf MT |
296 | // Reference Pakfire |
297 | j->pakfire = pakfire_ref(pakfire); | |
298 | ||
299 | // Initialize reference counter | |
300 | j->nrefs = 1; | |
301 | ||
ae5201c5 MT |
302 | // Generate a random UUID |
303 | uuid_generate_random(j->uuid); | |
304 | ||
84bd7655 MT |
305 | DEBUG(j->pakfire, "Allocated new jail at %p\n", j); |
306 | ||
d5bc8fe0 MT |
307 | // Set default environment |
308 | for (const struct environ* e = ENV; e->key; e++) { | |
309 | r = pakfire_jail_set_env(j, e->key, e->val); | |
310 | if (r) | |
311 | goto ERROR; | |
312 | } | |
313 | ||
aac86bd3 | 314 | // Enable all CPU features that CPU has to offer |
1f4e66a4 | 315 | if (!pakfire_arch_is_supported_by_host(arch)) { |
aac86bd3 MT |
316 | r = pakfire_jail_set_env(j, "QEMU_CPU", "max"); |
317 | if (r) | |
318 | goto ERROR; | |
319 | } | |
320 | ||
3bf01105 MT |
321 | // Set container UUID |
322 | r = pakfire_jail_set_env(j, "container_uuid", pakfire_jail_uuid(j)); | |
323 | if (r) | |
324 | goto ERROR; | |
325 | ||
367e708d MT |
326 | // Disable systemctl to talk to systemd |
327 | if (!pakfire_on_root(j->pakfire)) { | |
328 | r = pakfire_jail_set_env(j, "SYSTEMD_OFFLINE", "1"); | |
329 | if (r) | |
330 | goto ERROR; | |
331 | } | |
332 | ||
fd37ccaf MT |
333 | // Done |
334 | *jail = j; | |
335 | return 0; | |
84bd7655 | 336 | |
d5bc8fe0 MT |
337 | ERROR: |
338 | pakfire_jail_free(j); | |
32d5f21d | 339 | |
d5bc8fe0 | 340 | return r; |
fd37ccaf MT |
341 | } |
342 | ||
6ce56f90 | 343 | PAKFIRE_EXPORT struct pakfire_jail* pakfire_jail_ref(struct pakfire_jail* jail) { |
fd37ccaf MT |
344 | ++jail->nrefs; |
345 | ||
346 | return jail; | |
347 | } | |
348 | ||
6ce56f90 | 349 | PAKFIRE_EXPORT struct pakfire_jail* pakfire_jail_unref(struct pakfire_jail* jail) { |
fd37ccaf MT |
350 | if (--jail->nrefs > 0) |
351 | return jail; | |
352 | ||
353 | pakfire_jail_free(jail); | |
354 | return NULL; | |
355 | } | |
32d5f21d | 356 | |
cf440db8 MT |
357 | // Resource Limits |
358 | ||
359 | PAKFIRE_EXPORT int pakfire_jail_nice(struct pakfire_jail* jail, int nice) { | |
360 | // Check if nice level is in range | |
361 | if (nice < -19 || nice > 20) { | |
362 | errno = EINVAL; | |
363 | return 1; | |
364 | } | |
365 | ||
366 | // Store nice level | |
367 | jail->nice = nice; | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
15503538 MT |
372 | int pakfire_jail_set_cgroup(struct pakfire_jail* jail, struct pakfire_cgroup* cgroup) { |
373 | // Free any previous cgroup | |
374 | if (jail->cgroup) { | |
375 | pakfire_cgroup_unref(jail->cgroup); | |
376 | jail->cgroup = NULL; | |
377 | } | |
378 | ||
379 | // Set any new cgroup | |
380 | if (cgroup) { | |
381 | DEBUG(jail->pakfire, "Setting cgroup %p\n", cgroup); | |
382 | ||
383 | jail->cgroup = pakfire_cgroup_ref(cgroup); | |
384 | } | |
385 | ||
386 | // Done | |
387 | return 0; | |
388 | } | |
389 | ||
32d5f21d MT |
390 | // Environment |
391 | ||
392 | // Returns the length of the environment | |
393 | static unsigned int pakfire_jail_env_length(struct pakfire_jail* jail) { | |
394 | unsigned int i = 0; | |
395 | ||
396 | // Count everything in the environment | |
397 | for (char** e = jail->env; *e; e++) | |
398 | i++; | |
399 | ||
400 | return i; | |
401 | } | |
402 | ||
403 | // Finds an existing environment variable and returns its index or -1 if not found | |
404 | static int pakfire_jail_find_env(struct pakfire_jail* jail, const char* key) { | |
405 | if (!key) { | |
406 | errno = EINVAL; | |
407 | return -1; | |
408 | } | |
409 | ||
b88ae806 | 410 | const size_t length = strlen(key); |
32d5f21d MT |
411 | |
412 | for (unsigned int i = 0; jail->env[i]; i++) { | |
b88ae806 MT |
413 | if ((pakfire_string_startswith(jail->env[i], key) |
414 | && *(jail->env[i] + length) == '=')) { | |
32d5f21d | 415 | return i; |
b88ae806 | 416 | } |
32d5f21d MT |
417 | } |
418 | ||
419 | // Nothing found | |
420 | return -1; | |
421 | } | |
422 | ||
423 | // Returns the value of an environment variable or NULL | |
6ce56f90 MT |
424 | PAKFIRE_EXPORT const char* pakfire_jail_get_env(struct pakfire_jail* jail, |
425 | const char* key) { | |
32d5f21d MT |
426 | int i = pakfire_jail_find_env(jail, key); |
427 | if (i < 0) | |
428 | return NULL; | |
429 | ||
430 | return jail->env[i] + strlen(key) + 1; | |
431 | } | |
432 | ||
433 | // Sets an environment variable | |
6ce56f90 MT |
434 | PAKFIRE_EXPORT int pakfire_jail_set_env(struct pakfire_jail* jail, |
435 | const char* key, const char* value) { | |
32d5f21d MT |
436 | // Find the index where to write this value to |
437 | int i = pakfire_jail_find_env(jail, key); | |
438 | if (i < 0) | |
439 | i = pakfire_jail_env_length(jail); | |
440 | ||
441 | // Return -ENOSPC when the environment is full | |
442 | if (i >= ENVIRON_SIZE) { | |
443 | errno = ENOSPC; | |
444 | return -1; | |
445 | } | |
446 | ||
447 | // Free any previous value | |
448 | if (jail->env[i]) | |
449 | free(jail->env[i]); | |
450 | ||
451 | // Format and set environment variable | |
452 | asprintf(&jail->env[i], "%s=%s", key, value); | |
453 | ||
454 | DEBUG(jail->pakfire, "Set environment variable: %s\n", jail->env[i]); | |
455 | ||
456 | return 0; | |
457 | } | |
9f50bf71 | 458 | |
939025e7 | 459 | // Imports an environment |
6ce56f90 | 460 | PAKFIRE_EXPORT int pakfire_jail_import_env(struct pakfire_jail* jail, const char* env[]) { |
939025e7 MT |
461 | if (!env) |
462 | return 0; | |
463 | ||
464 | char* key; | |
465 | char* val; | |
466 | int r; | |
467 | ||
468 | // Copy environment variables | |
469 | for (unsigned int i = 0; env[i]; i++) { | |
470 | r = pakfire_string_partition(env[i], "=", &key, &val); | |
471 | if (r) | |
472 | continue; | |
473 | ||
474 | // Set value | |
475 | r = pakfire_jail_set_env(jail, key, val); | |
476 | ||
477 | if (key) | |
478 | free(key); | |
479 | if (val) | |
480 | free(val); | |
481 | ||
482 | // Break on error | |
483 | if (r) | |
484 | return r; | |
485 | } | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
335b8a44 MT |
490 | // Timeout |
491 | ||
492 | PAKFIRE_EXPORT int pakfire_jail_set_timeout( | |
493 | struct pakfire_jail* jail, unsigned int timeout) { | |
494 | // Store value | |
495 | jail->timeout.it_value.tv_sec = timeout; | |
496 | ||
497 | if (timeout > 0) | |
a8a41064 | 498 | DEBUG(jail->pakfire, "Timeout set to %u second(s)\n", timeout); |
335b8a44 MT |
499 | else |
500 | DEBUG(jail->pakfire, "Timeout disabled\n"); | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
505 | static int pakfire_jail_create_timer(struct pakfire_jail* jail) { | |
506 | int r; | |
507 | ||
508 | // Nothing to do if no timeout has been set | |
509 | if (!jail->timeout.it_value.tv_sec) | |
510 | return -1; | |
511 | ||
512 | // Create a new timer | |
513 | const int fd = timerfd_create(CLOCK_MONOTONIC, 0); | |
514 | if (fd < 0) { | |
515 | ERROR(jail->pakfire, "Could not create timer: %m\n"); | |
516 | goto ERROR; | |
517 | } | |
518 | ||
519 | // Arm timer | |
520 | r = timerfd_settime(fd, 0, &jail->timeout, NULL); | |
521 | if (r) { | |
522 | ERROR(jail->pakfire, "Could not arm timer: %m\n"); | |
523 | goto ERROR; | |
524 | } | |
525 | ||
526 | return fd; | |
527 | ||
528 | ERROR: | |
dd2d7dbb | 529 | if (fd >= 0) |
335b8a44 MT |
530 | close(fd); |
531 | ||
532 | return -1; | |
533 | } | |
534 | ||
d8b94dd5 MT |
535 | /* |
536 | Standard Input | |
537 | */ | |
538 | PAKFIRE_EXPORT void pakfire_jail_set_stdin_callback(struct pakfire_jail* jail, | |
539 | pakfire_jail_stdin_callback callback, void* data) { | |
540 | jail->callbacks.stdin.callback = callback; | |
541 | jail->callbacks.stdin.data = data; | |
542 | } | |
543 | ||
544 | /* | |
545 | Standard Output | |
546 | */ | |
547 | PAKFIRE_EXPORT void pakfire_jail_set_stdout_callback(struct pakfire_jail* jail, | |
548 | pakfire_jail_stdout_callback callback, void* data) { | |
549 | jail->callbacks.stdout.callback = callback; | |
550 | jail->callbacks.stdout.data = data; | |
551 | } | |
552 | ||
e33387d3 MT |
553 | /* |
554 | This function replaces any logging in the child process. | |
555 | ||
556 | All log messages will be sent to the parent process through their respective pipes. | |
557 | */ | |
19e50d86 | 558 | static void pakfire_jail_log_redirect(void* data, int priority, const char* file, |
e33387d3 MT |
559 | int line, const char* fn, const char* format, va_list args) { |
560 | struct pakfire_jail_pipes* pipes = (struct pakfire_jail_pipes*)data; | |
561 | int fd; | |
562 | ||
563 | switch (priority) { | |
564 | case LOG_INFO: | |
565 | fd = pipes->log_INFO[1]; | |
566 | break; | |
567 | ||
568 | case LOG_ERR: | |
569 | fd = pipes->log_ERROR[1]; | |
570 | break; | |
571 | ||
572 | #ifdef ENABLE_DEBUG | |
573 | case LOG_DEBUG: | |
574 | fd = pipes->log_DEBUG[1]; | |
575 | break; | |
576 | #endif /* ENABLE_DEBUG */ | |
577 | ||
578 | // Ignore any messages of an unknown priority | |
579 | default: | |
580 | return; | |
581 | } | |
582 | ||
f52ed269 MT |
583 | // End if we do not have a file descriptor to write to |
584 | if (fd < 0) | |
585 | return; | |
586 | ||
587 | // Optionally log the function name | |
588 | if (fn) | |
589 | dprintf(fd, "%s: ", fn); | |
590 | ||
e33387d3 | 591 | // Send the log message |
f52ed269 | 592 | vdprintf(fd, format, args); |
e33387d3 MT |
593 | } |
594 | ||
bb1a7acd MT |
595 | static int pakfire_jail_fill_buffer(struct pakfire_jail* jail, int fd, struct pakfire_log_buffer* buffer) { |
596 | int r; | |
597 | ||
598 | // Skip this if there is not space left in the buffer | |
599 | if (buffer->used >= sizeof(buffer->data)) | |
600 | return 0; | |
601 | ||
602 | // Fill the buffer | |
603 | r = read(fd, buffer->data + buffer->used, sizeof(buffer->data) - buffer->used); | |
604 | ||
605 | // Handle errors | |
606 | if (r < 0) { | |
607 | switch (errno) { | |
608 | case EAGAIN: | |
609 | case EIO: | |
610 | break; | |
611 | ||
612 | default: | |
613 | return -errno; | |
614 | } | |
615 | ||
616 | // EOF | |
617 | } else if (r == 0) { | |
618 | // XXX What to do here? | |
619 | ||
620 | // Successful read | |
621 | } else { | |
622 | buffer->used += r; | |
623 | } | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
685389c5 | 628 | static int pakfire_jail_drain_buffer_with_callback(struct pakfire_jail* jail, |
1a7eb888 | 629 | struct pakfire_log_buffer* buffer, pakfire_jail_stdout_callback callback, void* data) { |
685389c5 MT |
630 | const char* eol = NULL; |
631 | int r; | |
632 | ||
633 | while (buffer->used) { | |
634 | // Search for the end of the first line | |
635 | eol = memchr(buffer->data, '\n', buffer->used); | |
636 | ||
637 | // No newline found | |
638 | if (!eol) { | |
639 | // If the buffer is full, we send the entire content to make space. | |
3fef3887 | 640 | if (buffer->used >= sizeof(buffer->data)) { |
685389c5 MT |
641 | CTX_DEBUG(jail->ctx, "Buffer is full. Sending all content\n"); |
642 | ||
643 | eol = buffer->data + buffer->used - 1; | |
644 | ||
645 | // Otherwise we might have only read parts of the output... | |
646 | } else { | |
647 | break; | |
648 | } | |
649 | } | |
650 | ||
651 | // Find the length of the string | |
652 | const size_t length = eol - buffer->data + 1; | |
653 | ||
654 | // Call the callback | |
04d3c185 | 655 | r = callback(jail->ctx, jail, data, buffer->data, length); |
685389c5 | 656 | if (r) { |
1a7eb888 | 657 | CTX_ERROR(jail->ctx, "The standard output callback returned an error: %d\n", r); |
685389c5 MT |
658 | return r; |
659 | } | |
660 | ||
661 | // Remove line from buffer | |
662 | memmove(buffer->data, buffer->data + length, buffer->used - length); | |
663 | buffer->used -= length; | |
664 | } | |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
bb1a7acd MT |
669 | static int pakfire_jail_drain_buffer(struct pakfire_jail* jail, int fd, struct pakfire_log_buffer* buffer) { |
670 | int r; | |
671 | ||
672 | // Nothing to do if the buffer is empty | |
673 | if (!buffer->used) | |
674 | return 0; | |
675 | ||
d45cb127 MT |
676 | // Do not try to write to an invalid file descriptor |
677 | if (fd < 0) | |
678 | return 0; | |
679 | ||
bb1a7acd MT |
680 | // Drain the buffer |
681 | r = write(fd, buffer->data, buffer->used); | |
682 | ||
683 | // Handle errors | |
684 | if (r < 0) { | |
685 | switch (errno) { | |
686 | case EAGAIN: | |
687 | case EIO: | |
688 | break; | |
689 | ||
690 | default: | |
691 | return -errno; | |
692 | } | |
693 | ||
694 | // Successful write | |
695 | } else { | |
696 | memmove(buffer->data, buffer->data + r, buffer->used - r); | |
697 | ||
698 | buffer->used -= r; | |
699 | } | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
1a7eb888 MT |
704 | /* |
705 | Passes any log messages on to the default pakfire log callback | |
706 | */ | |
04d3c185 | 707 | static int pakfire_jail_log(struct pakfire_ctx* ctx, struct pakfire_jail* jail, |
1a7eb888 MT |
708 | void* data, const char* line, size_t length) { |
709 | int* priority = data; | |
710 | ||
711 | if (pakfire_ctx_get_log_level(jail->ctx) >= *priority) | |
712 | pakfire_ctx_log(jail->ctx, *priority, NULL, 0, NULL, "%.*s", (int)length, line); | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
616f1fca MT |
717 | /* |
718 | This function reads as much data as it can from the file descriptor. | |
719 | If it finds a whole line in it, it will send it to the logger and repeat the process. | |
720 | If not newline character is found, it will try to read more data until it finds one. | |
721 | */ | |
685389c5 | 722 | static int pakfire_jail_handle_log(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx, |
1a7eb888 | 723 | int fd, struct pakfire_log_buffer* buffer, pakfire_jail_stdout_callback callback, void* data) { |
bb1a7acd | 724 | int r; |
616f1fca MT |
725 | |
726 | // Fill up buffer from fd | |
bb1a7acd MT |
727 | r = pakfire_jail_fill_buffer(jail, fd, buffer); |
728 | if (r) | |
729 | return r; | |
616f1fca | 730 | |
685389c5 | 731 | // Drain the buffer |
1a7eb888 | 732 | r = pakfire_jail_drain_buffer_with_callback(jail, buffer, callback, data); |
685389c5 MT |
733 | if (r) |
734 | return r; | |
616f1fca MT |
735 | |
736 | return 0; | |
737 | } | |
738 | ||
06b864ae MT |
739 | static int pakfire_jail_stream_stdin(struct pakfire_jail* jail, |
740 | struct pakfire_jail_exec* ctx, const int fd) { | |
eefb6204 | 741 | const char eof = 0x04; |
06b864ae MT |
742 | int r; |
743 | ||
f5a70a96 | 744 | // Skip if the writing pipe has already been closed |
eefb6204 | 745 | if (fd < 0) |
f5a70a96 MT |
746 | return 0; |
747 | ||
eefb6204 | 748 | CTX_DEBUG(jail->ctx, "Streaming standard input...\n"); |
06b864ae MT |
749 | |
750 | // Calling the callback | |
04d3c185 | 751 | r = jail->callbacks.stdin.callback(jail->ctx, jail, jail->callbacks.stdin.data, fd); |
06b864ae | 752 | |
eefb6204 MT |
753 | switch (r) { |
754 | case EOF: | |
755 | // The callback signaled that it has written everything | |
756 | CTX_DEBUG(jail->ctx, "Closing standard input pipe\n"); | |
06b864ae | 757 | |
eefb6204 MT |
758 | // Send EOF (Ctrl-D) |
759 | r = write(fd, &eof, sizeof(eof)); | |
760 | if (r < 0) { | |
761 | CTX_ERROR(jail->ctx, "Could not write EOF: %s\n", strerror(errno)); | |
762 | return -errno; | |
763 | } | |
06b864ae | 764 | |
eefb6204 | 765 | return 0; |
f5a70a96 | 766 | |
eefb6204 MT |
767 | case 0: |
768 | CTX_DEBUG(jail->ctx, "Standard input callback finished\n"); | |
769 | return 0; | |
f5a70a96 | 770 | |
eefb6204 MT |
771 | default: |
772 | CTX_ERROR(jail->ctx, "Standard input callback failed: %s\n", strerror(-r)); | |
773 | return r; | |
06b864ae | 774 | } |
06b864ae MT |
775 | } |
776 | ||
8f49d254 MT |
777 | static int pakfire_jail_recv_fd(struct pakfire_jail* jail, int socket, int* fd) { |
778 | const size_t payload_length = sizeof(fd); | |
779 | char buffer[CMSG_SPACE(payload_length)]; | |
780 | int r; | |
781 | ||
782 | struct msghdr msg = { | |
783 | .msg_control = buffer, | |
784 | .msg_controllen = sizeof(buffer), | |
785 | }; | |
786 | ||
787 | // Receive the message | |
788 | r = recvmsg(socket, &msg, 0); | |
789 | if (r) { | |
790 | CTX_ERROR(jail->ctx, "Could not receive file descriptor: %s\n", strerror(errno)); | |
791 | return -errno; | |
792 | } | |
793 | ||
794 | // Fetch the payload | |
795 | struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg); | |
796 | if (!cmsg) | |
797 | return -EBADMSG; | |
798 | ||
799 | *fd = *((int*)CMSG_DATA(cmsg)); | |
800 | ||
801 | CTX_DEBUG(jail->ctx, "Received fd %d from socket %d\n", *fd, socket); | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
806 | static int pakfire_jail_send_fd(struct pakfire_jail* jail, int socket, int fd) { | |
807 | const size_t payload_length = sizeof(fd); | |
808 | char buffer[CMSG_SPACE(payload_length)]; | |
809 | int r; | |
810 | ||
811 | CTX_DEBUG(jail->ctx, "Sending fd %d to socket %d\n", fd, socket); | |
812 | ||
813 | // Header | |
814 | struct msghdr msg = { | |
815 | .msg_control = buffer, | |
816 | .msg_controllen = sizeof(buffer), | |
817 | }; | |
818 | ||
819 | // Payload | |
820 | struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg); | |
821 | cmsg->cmsg_level = SOL_SOCKET; | |
822 | cmsg->cmsg_type = SCM_RIGHTS; | |
823 | cmsg->cmsg_len = CMSG_LEN(payload_length); | |
824 | ||
825 | // Set payload | |
826 | *((int*)CMSG_DATA(cmsg)) = fd; | |
827 | ||
828 | // Send the message | |
829 | r = sendmsg(socket, &msg, 0); | |
830 | if (r) { | |
831 | CTX_ERROR(jail->ctx, "Could not send file descriptor: %s\n", strerror(errno)); | |
832 | return -errno; | |
833 | } | |
834 | ||
835 | return 0; | |
836 | } | |
837 | ||
195fe455 MT |
838 | static int pakfire_jail_setup_pipe(struct pakfire_jail* jail, int (*fds)[2], const int flags) { |
839 | int r = pipe2(*fds, flags); | |
840 | if (r < 0) { | |
841 | ERROR(jail->pakfire, "Could not setup pipe: %m\n"); | |
842 | return 1; | |
843 | } | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | static void pakfire_jail_close_pipe(struct pakfire_jail* jail, int fds[2]) { | |
849 | for (unsigned int i = 0; i < 2; i++) | |
dd2d7dbb | 850 | if (fds[i] >= 0) |
195fe455 MT |
851 | close(fds[i]); |
852 | } | |
853 | ||
e33387d3 MT |
854 | /* |
855 | This is a convenience function to fetch the reading end of a pipe and | |
856 | closes the write end. | |
857 | */ | |
06b864ae | 858 | static int pakfire_jail_get_pipe_to_read(struct pakfire_jail* jail, int (*fds)[2]) { |
e33387d3 MT |
859 | // Give the variables easier names to avoid confusion |
860 | int* fd_read = &(*fds)[0]; | |
861 | int* fd_write = &(*fds)[1]; | |
862 | ||
863 | // Close the write end of the pipe | |
4c3bab92 | 864 | if (*fd_write >= 0) { |
e33387d3 | 865 | close(*fd_write); |
d2eaf8dc | 866 | *fd_write = -1; |
e33387d3 MT |
867 | } |
868 | ||
869 | // Return the read end | |
4c3bab92 MT |
870 | if (*fd_read >= 0) |
871 | return *fd_read; | |
872 | ||
873 | return -1; | |
e33387d3 MT |
874 | } |
875 | ||
06b864ae MT |
876 | static int pakfire_jail_get_pipe_to_write(struct pakfire_jail* jail, int (*fds)[2]) { |
877 | // Give the variables easier names to avoid confusion | |
878 | int* fd_read = &(*fds)[0]; | |
879 | int* fd_write = &(*fds)[1]; | |
880 | ||
881 | // Close the read end of the pipe | |
4c3bab92 | 882 | if (*fd_read >= 0) { |
06b864ae | 883 | close(*fd_read); |
d2eaf8dc | 884 | *fd_read = -1; |
06b864ae MT |
885 | } |
886 | ||
887 | // Return the write end | |
4c3bab92 MT |
888 | if (*fd_write >= 0) |
889 | return *fd_write; | |
890 | ||
891 | return -1; | |
06b864ae MT |
892 | } |
893 | ||
e4fded3a MT |
894 | static int pakfire_jail_epoll_add_fd(struct pakfire_jail* jail, int epollfd, int fd, int events) { |
895 | struct epoll_event event = { | |
896 | .events = events|EPOLLHUP, | |
897 | .data = { | |
898 | .fd = fd, | |
899 | }, | |
900 | }; | |
901 | int r; | |
902 | ||
903 | // Read flags | |
904 | int flags = fcntl(fd, F_GETFL, 0); | |
905 | ||
906 | // Set modified flags | |
907 | r = fcntl(fd, F_SETFL, flags|O_NONBLOCK); | |
908 | if (r < 0) { | |
909 | CTX_ERROR(jail->ctx, "Could not set file descriptor %d into non-blocking mode: %s\n", | |
910 | fd, strerror(errno)); | |
911 | return -errno; | |
912 | } | |
913 | ||
914 | // Add the file descriptor to the loop | |
915 | r = epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &event); | |
916 | if (r < 0) { | |
917 | ERROR(jail->pakfire, "Could not add file descriptor %d to epoll(): %s\n", | |
918 | fd, strerror(errno)); | |
919 | return -errno; | |
920 | } | |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
690ff87c MT |
925 | // PTY Forwarding |
926 | ||
927 | static int pakfire_jail_enable_raw_mode(struct pakfire_jail* jail, | |
928 | struct pakfire_jail_pty_stdio* stdio) { | |
929 | struct termios raw_attrs; | |
930 | int r; | |
931 | ||
d45cb127 MT |
932 | // Skip if we don't know the file descriptor |
933 | if (stdio->fd < 0) | |
934 | return 0; | |
935 | ||
a6d1853b MT |
936 | // Skip everything if fd is not a TTY |
937 | if (!isatty(stdio->fd)) | |
938 | return 0; | |
939 | ||
a12a3659 | 940 | // Store flags |
6ce285a1 MT |
941 | stdio->flags = fcntl(stdio->fd, F_GETFL); |
942 | if (stdio->flags < 0) { | |
a12a3659 MT |
943 | CTX_ERROR(jail->ctx, "Could not fetch flags from fd %d: %s\n", |
944 | stdio->fd, strerror(errno)); | |
945 | return -errno; | |
946 | } | |
947 | ||
690ff87c MT |
948 | // Fetch all attributes |
949 | r = tcgetattr(stdio->fd, &stdio->attrs); | |
950 | if (r) { | |
951 | CTX_ERROR(jail->ctx, "Could not fetch terminal attributes from fd %d: %s\n", | |
952 | stdio->fd, strerror(errno)); | |
953 | return -errno; | |
954 | } | |
955 | ||
956 | // Copy all attributes | |
957 | raw_attrs = stdio->attrs; | |
958 | ||
959 | // Make it RAW | |
960 | cfmakeraw(&raw_attrs); | |
961 | ||
dd699e59 MT |
962 | switch (stdio->fd) { |
963 | case STDIN_FILENO: | |
964 | raw_attrs.c_oflag = stdio->attrs.c_oflag; | |
965 | break; | |
966 | ||
967 | case STDOUT_FILENO: | |
968 | raw_attrs.c_iflag = stdio->attrs.c_iflag; | |
969 | raw_attrs.c_lflag = stdio->attrs.c_lflag; | |
970 | break; | |
971 | } | |
972 | ||
690ff87c MT |
973 | // Restore the attributes |
974 | r = tcsetattr(stdio->fd, TCSANOW, &raw_attrs); | |
975 | if (r) { | |
976 | CTX_ERROR(jail->ctx, "Could not restore terminal attributes for fd %d: %s\n", | |
977 | stdio->fd, strerror(errno)); | |
978 | return -errno; | |
979 | } | |
980 | ||
981 | return 0; | |
982 | } | |
983 | ||
a12a3659 | 984 | static int pakfire_jail_restore_attrs(struct pakfire_jail* jail, |
690ff87c MT |
985 | const struct pakfire_jail_pty_stdio* stdio) { |
986 | int r; | |
987 | ||
d45cb127 MT |
988 | // Skip if we don't know the file descriptor |
989 | if (stdio->fd < 0) | |
990 | return 0; | |
991 | ||
a6d1853b MT |
992 | // Skip everything if fd is not a TTY |
993 | if (!isatty(stdio->fd)) | |
994 | return 0; | |
995 | ||
a12a3659 | 996 | // Restore the flags |
6ce285a1 | 997 | r = fcntl(stdio->fd, F_SETFL, stdio->flags); |
a12a3659 MT |
998 | if (r < 0) { |
999 | CTX_ERROR(jail->ctx, "Could not set flags for file descriptor %d: %s\n", | |
1000 | stdio->fd, strerror(errno)); | |
1001 | return -errno; | |
1002 | } | |
1003 | ||
690ff87c MT |
1004 | // Restore the attributes |
1005 | r = tcsetattr(stdio->fd, TCSANOW, &stdio->attrs); | |
1006 | if (r) { | |
a12a3659 | 1007 | CTX_ERROR(jail->ctx, "Could not restore terminal attributes for %d, ignoring: %s\n", |
690ff87c | 1008 | stdio->fd, strerror(errno)); |
a12a3659 | 1009 | return -errno; |
690ff87c | 1010 | } |
a12a3659 MT |
1011 | |
1012 | return 0; | |
690ff87c MT |
1013 | } |
1014 | ||
92f2120e MT |
1015 | static int pakfire_jail_setup_pty_forwarding(struct pakfire_jail* jail, |
1016 | struct pakfire_jail_exec* ctx, const int epollfd, const int fd) { | |
690ff87c MT |
1017 | struct winsize size; |
1018 | int r; | |
1019 | ||
1020 | CTX_DEBUG(jail->ctx, "Setting up PTY forwarding on fd %d\n", fd); | |
1021 | ||
92f2120e | 1022 | // Store the file descriptor |
690ff87c | 1023 | ctx->pty.master.fd = fd; |
92f2120e | 1024 | |
d45cb127 MT |
1025 | // Add the master to the event loop |
1026 | r = pakfire_jail_epoll_add_fd(jail, epollfd, ctx->pty.master.fd, EPOLLIN|EPOLLOUT|EPOLLET); | |
1027 | if (r) | |
1028 | return r; | |
690ff87c | 1029 | |
d45cb127 MT |
1030 | if (ctx->flags & PAKFIRE_JAIL_PTY_FORWARDING) { |
1031 | // Configure stdin/stdout | |
1032 | ctx->pty.stdin.fd = STDIN_FILENO; | |
1033 | ctx->pty.stdout.fd = STDOUT_FILENO; | |
690ff87c | 1034 | |
d45cb127 MT |
1035 | // Fetch dimensions |
1036 | if (isatty(ctx->pty.stdout.fd)) { | |
1037 | r = ioctl(ctx->pty.stdout.fd, TIOCGWINSZ, &size); | |
1038 | if (r) { | |
1039 | CTX_ERROR(jail->ctx, "Failed to determine terminal dimensions: %s\n", strerror(errno)); | |
1040 | return -errno; | |
1041 | } | |
690ff87c | 1042 | |
d45cb127 MT |
1043 | // Set dimensions |
1044 | r = ioctl(ctx->pty.master.fd, TIOCSWINSZ, &size); | |
1045 | if (r) { | |
1046 | CTX_ERROR(jail->ctx, "Failed setting dimensions: %s\n", strerror(errno)); | |
1047 | return -errno; | |
1048 | } | |
1049 | } | |
690ff87c | 1050 | |
d45cb127 MT |
1051 | // Enable RAW mode on standard input |
1052 | r = pakfire_jail_enable_raw_mode(jail, &ctx->pty.stdin); | |
1053 | if (r) | |
1054 | return r; | |
690ff87c | 1055 | |
d45cb127 MT |
1056 | // Enable RAW mode on standard output |
1057 | r = pakfire_jail_enable_raw_mode(jail, &ctx->pty.stdout); | |
1058 | if (r) | |
1059 | return r; | |
690ff87c | 1060 | |
d45cb127 MT |
1061 | // Add standard input to the event loop |
1062 | r = pakfire_jail_epoll_add_fd(jail, epollfd, ctx->pty.stdin.fd, EPOLLIN|EPOLLET); | |
1063 | if (r) | |
1064 | return r; | |
690ff87c | 1065 | |
d45cb127 MT |
1066 | // Add standard output to the event loop |
1067 | r = pakfire_jail_epoll_add_fd(jail, epollfd, ctx->pty.stdout.fd, EPOLLOUT|EPOLLET); | |
1068 | if (r) | |
1069 | return r; | |
1070 | } | |
92f2120e MT |
1071 | |
1072 | return 0; | |
1073 | } | |
1074 | ||
04d3c185 MT |
1075 | static int pakfire_jail_command_output(struct pakfire_ctx* ctx, struct pakfire_jail* jail, |
1076 | void* data, const char* line, const size_t length) { | |
1077 | CTX_INFO(ctx, "Command Output: %.*s", (int)length, line); | |
1a7eb888 MT |
1078 | |
1079 | return 0; | |
1080 | } | |
1081 | ||
c15801c7 MT |
1082 | static int pakfire_jail_forward_pty(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx) { |
1083 | int r; | |
1084 | ||
6ce285a1 | 1085 | while (ctx->pty.master.io || ctx->pty.stdin.io || ctx->pty.stdout.io) { |
6c7ddcda | 1086 | // Read from standard input |
6ce285a1 | 1087 | if (ctx->pty.stdin.io & PAKFIRE_JAIL_PTY_READY_TO_READ) { |
6c7ddcda MT |
1088 | r = pakfire_jail_fill_buffer(jail, ctx->pty.stdin.fd, &ctx->pty.stdin.buffer); |
1089 | if (r) { | |
1090 | CTX_ERROR(jail->ctx, "Failed reading from standard input: %s\n", strerror(-r)); | |
1091 | return r; | |
1092 | } | |
c15801c7 | 1093 | |
6c7ddcda | 1094 | // We are done reading for now |
6ce285a1 | 1095 | ctx->pty.stdin.io &= ~PAKFIRE_JAIL_PTY_READY_TO_READ; |
c15801c7 | 1096 | |
6c7ddcda MT |
1097 | // But we may have data to write |
1098 | if (ctx->pty.stdin.buffer.used) | |
6ce285a1 | 1099 | ctx->pty.master.io |= PAKFIRE_JAIL_PTY_READY_TO_WRITE; |
c15801c7 MT |
1100 | } |
1101 | ||
6c7ddcda | 1102 | // Write to the master |
6ce285a1 | 1103 | if (ctx->pty.master.io & PAKFIRE_JAIL_PTY_READY_TO_WRITE) { |
1a7eb888 | 1104 | if (jail->callbacks.stdin.callback) { |
eefb6204 MT |
1105 | r = pakfire_jail_stream_stdin(jail, ctx, ctx->pty.master.fd); |
1106 | if (r) | |
1107 | return r; | |
1108 | ||
1109 | } else { | |
1110 | r = pakfire_jail_drain_buffer(jail, ctx->pty.master.fd, &ctx->pty.stdin.buffer); | |
1111 | if (r) { | |
1112 | CTX_ERROR(jail->ctx, "Failed writing to the PTY: %s\n", strerror(-r)); | |
1113 | return r; | |
1114 | } | |
6c7ddcda | 1115 | } |
c15801c7 | 1116 | |
6c7ddcda | 1117 | // We are done writing for now |
6ce285a1 | 1118 | ctx->pty.master.io &= ~PAKFIRE_JAIL_PTY_READY_TO_WRITE; |
c15801c7 MT |
1119 | } |
1120 | ||
6c7ddcda | 1121 | // Read from the master |
6ce285a1 | 1122 | if (ctx->pty.master.io & PAKFIRE_JAIL_PTY_READY_TO_READ) { |
6c7ddcda | 1123 | r = pakfire_jail_fill_buffer(jail, ctx->pty.master.fd, &ctx->pty.stdout.buffer); |
112458fc | 1124 | if (r) { |
6c7ddcda | 1125 | CTX_ERROR(jail->ctx, "Failed reading from the PTY: %s\n", strerror(-r)); |
112458fc MT |
1126 | return r; |
1127 | } | |
1128 | ||
6c7ddcda | 1129 | // We are done reading for now |
6ce285a1 | 1130 | ctx->pty.master.io &= ~PAKFIRE_JAIL_PTY_READY_TO_READ; |
6c7ddcda MT |
1131 | |
1132 | // But we may have data to write | |
1133 | if (ctx->pty.stdout.buffer.used) | |
6ce285a1 | 1134 | ctx->pty.stdout.io |= PAKFIRE_JAIL_PTY_READY_TO_WRITE; |
c15801c7 MT |
1135 | } |
1136 | ||
6c7ddcda | 1137 | // Write to standard output |
c63d939b | 1138 | if (ctx->pty.stdout.io & PAKFIRE_JAIL_PTY_READY_TO_WRITE) { |
6c7ddcda | 1139 | // If we have a callback, we will send any output to the callback |
1a7eb888 | 1140 | if (jail->callbacks.stdout.callback) { |
6c7ddcda | 1141 | r = pakfire_jail_drain_buffer_with_callback(jail, &ctx->pty.stdout.buffer, |
1a7eb888 | 1142 | jail->callbacks.stdout.callback, jail->callbacks.stdout.data); |
6c7ddcda MT |
1143 | if (r) |
1144 | return r; | |
1145 | ||
1146 | // If we have a file descriptor, we will forward any output | |
1147 | } else if (ctx->pty.stdout.fd >= 0) { | |
1148 | r = pakfire_jail_drain_buffer(jail, ctx->pty.stdout.fd, &ctx->pty.stdout.buffer); | |
1149 | if (r) { | |
1150 | CTX_ERROR(jail->ctx, "Failed writing to standard output: %s\n", strerror(-r)); | |
1151 | return r; | |
1152 | } | |
1153 | ||
1154 | // Otherwise send the output to the default logger | |
1155 | } else { | |
1156 | r = pakfire_jail_drain_buffer_with_callback(jail, &ctx->pty.stdout.buffer, | |
1a7eb888 | 1157 | pakfire_jail_command_output, NULL); |
6c7ddcda MT |
1158 | if (r) |
1159 | return r; | |
1160 | } | |
1161 | ||
1162 | // We are done writing for now | |
6ce285a1 | 1163 | ctx->pty.stdout.io &= ~PAKFIRE_JAIL_PTY_READY_TO_WRITE; |
6c7ddcda | 1164 | } |
c15801c7 MT |
1165 | } |
1166 | ||
1167 | return 0; | |
1168 | } | |
1169 | ||
d853213d | 1170 | static int pakfire_jail_wait(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx) { |
616f1fca | 1171 | int epollfd = -1; |
616f1fca | 1172 | struct epoll_event events[EPOLL_MAX_EVENTS]; |
335b8a44 | 1173 | char garbage[8]; |
616f1fca MT |
1174 | int r = 0; |
1175 | ||
1176 | // Fetch file descriptors from context | |
f949feac | 1177 | const int pidfd = ctx->pidfd; |
616f1fca | 1178 | |
8f49d254 MT |
1179 | // Fetch the UNIX domain socket |
1180 | const int socket_recv = pakfire_jail_get_pipe_to_read(jail, &ctx->socket); | |
1181 | ||
335b8a44 MT |
1182 | // Timer |
1183 | const int timerfd = pakfire_jail_create_timer(jail); | |
1184 | ||
e33387d3 | 1185 | // Logging |
06b864ae MT |
1186 | const int log_INFO = pakfire_jail_get_pipe_to_read(jail, &ctx->pipes.log_INFO); |
1187 | const int log_ERROR = pakfire_jail_get_pipe_to_read(jail, &ctx->pipes.log_ERROR); | |
6ac51607 | 1188 | #ifdef ENABLE_DEBUG |
06b864ae | 1189 | const int log_DEBUG = pakfire_jail_get_pipe_to_read(jail, &ctx->pipes.log_DEBUG); |
6ac51607 | 1190 | #endif /* ENABLE_DEBUG */ |
7ebfb7cb MT |
1191 | |
1192 | // Make a list of all file descriptors we are interested in | |
e4fded3a MT |
1193 | const struct pakfire_wait_fds { |
1194 | const int fd; | |
1195 | const int events; | |
1196 | } fds[] = { | |
e4fded3a MT |
1197 | // Timer |
1198 | { timerfd, EPOLLIN }, | |
1199 | ||
1200 | // Child Process | |
1201 | { ctx->pidfd, EPOLLIN }, | |
1202 | ||
1203 | // Log Pipes | |
1204 | { log_INFO, EPOLLIN }, | |
1205 | { log_ERROR, EPOLLIN }, | |
6ac51607 | 1206 | #ifdef ENABLE_DEBUG |
e4fded3a | 1207 | { log_DEBUG, EPOLLIN }, |
6ac51607 | 1208 | #endif /* ENABLE_DEBUG */ |
e4fded3a | 1209 | |
8f49d254 MT |
1210 | // UNIX Domain Socket |
1211 | { socket_recv, EPOLLIN }, | |
1212 | ||
e4fded3a MT |
1213 | // Sentinel |
1214 | { -1, 0 }, | |
616f1fca MT |
1215 | }; |
1216 | ||
1217 | // Setup epoll | |
1218 | epollfd = epoll_create1(0); | |
1219 | if (epollfd < 0) { | |
1220 | ERROR(jail->pakfire, "Could not initialize epoll(): %m\n"); | |
1221 | r = 1; | |
d853213d | 1222 | goto ERROR; |
616f1fca MT |
1223 | } |
1224 | ||
616f1fca | 1225 | // Turn file descriptors into non-blocking mode and add them to epoll() |
e4fded3a | 1226 | for (const struct pakfire_wait_fds* fd = fds; fd->events; fd++) { |
d853213d | 1227 | // Skip fds which were not initialized |
e4fded3a | 1228 | if (fd->fd < 0) |
d853213d MT |
1229 | continue; |
1230 | ||
e4fded3a MT |
1231 | // Add the FD to the event loop |
1232 | r = pakfire_jail_epoll_add_fd(jail, epollfd, fd->fd, fd->events); | |
1233 | if (r) | |
f949feac | 1234 | goto ERROR; |
616f1fca MT |
1235 | } |
1236 | ||
1237 | int ended = 0; | |
1238 | ||
1239 | // Loop for as long as the process is alive | |
1240 | while (!ended) { | |
616f1fca MT |
1241 | int num = epoll_wait(epollfd, events, EPOLL_MAX_EVENTS, -1); |
1242 | if (num < 1) { | |
1243 | // Ignore if epoll_wait() has been interrupted | |
1244 | if (errno == EINTR) | |
1245 | continue; | |
1246 | ||
1247 | ERROR(jail->pakfire, "epoll_wait() failed: %m\n"); | |
1248 | r = 1; | |
1249 | ||
d853213d | 1250 | goto ERROR; |
616f1fca MT |
1251 | } |
1252 | ||
616f1fca | 1253 | for (int i = 0; i < num; i++) { |
e068b964 | 1254 | int e = events[i].events; |
616f1fca MT |
1255 | int fd = events[i].data.fd; |
1256 | ||
c15801c7 MT |
1257 | // Handle PTY forwarding events |
1258 | if (ctx->pty.master.fd == fd) { | |
1259 | if (e & (EPOLLIN|EPOLLHUP)) | |
6ce285a1 | 1260 | ctx->pty.master.io |= PAKFIRE_JAIL_PTY_READY_TO_READ; |
c15801c7 MT |
1261 | |
1262 | if (e & (EPOLLOUT|EPOLLHUP)) | |
6ce285a1 | 1263 | ctx->pty.master.io |= PAKFIRE_JAIL_PTY_READY_TO_WRITE; |
c15801c7 MT |
1264 | |
1265 | // Perform the work | |
1266 | r = pakfire_jail_forward_pty(jail, ctx); | |
1267 | if (r) { | |
1268 | CTX_ERROR(jail->ctx, "Failed forwarding the PTY: %s\n", strerror(-r)); | |
1269 | goto ERROR; | |
1270 | } | |
1271 | ||
1272 | // Handle standard input | |
1273 | } else if (ctx->pty.stdin.fd == fd) { | |
1274 | if (e & (EPOLLIN|EPOLLHUP)) | |
6ce285a1 | 1275 | ctx->pty.stdin.io |= PAKFIRE_JAIL_PTY_READY_TO_READ; |
c15801c7 MT |
1276 | |
1277 | // Perform the work | |
1278 | r = pakfire_jail_forward_pty(jail, ctx); | |
1279 | if (r) { | |
1280 | CTX_ERROR(jail->ctx, "Failed forwarding the PTY: %s\n", strerror(-r)); | |
1281 | goto ERROR; | |
1282 | } | |
1283 | ||
1284 | // Handle standard output | |
1285 | } else if (ctx->pty.stdout.fd == fd) { | |
1286 | if (e & (EPOLLOUT|EPOLLHUP)) | |
6ce285a1 | 1287 | ctx->pty.stdout.io |= PAKFIRE_JAIL_PTY_READY_TO_WRITE; |
c15801c7 MT |
1288 | |
1289 | // Perform the work | |
1290 | r = pakfire_jail_forward_pty(jail, ctx); | |
1291 | if (r) { | |
1292 | CTX_ERROR(jail->ctx, "Failed forwarding the PTY: %s\n", strerror(-r)); | |
1293 | goto ERROR; | |
1294 | } | |
c15801c7 | 1295 | |
a2d03d52 MT |
1296 | // Handle any changes to the PIDFD |
1297 | } else if (pidfd == fd) { | |
1298 | if (e & EPOLLIN) { | |
f949feac MT |
1299 | // Call waidid() and store the result |
1300 | r = waitid(P_PIDFD, ctx->pidfd, &ctx->status, WEXITED); | |
e068b964 | 1301 | if (r) { |
f949feac | 1302 | ERROR(jail->pakfire, "waitid() failed: %m\n"); |
e068b964 MT |
1303 | goto ERROR; |
1304 | } | |
d853213d | 1305 | |
e068b964 MT |
1306 | // Mark that we have ended so that we will process the remaining |
1307 | // events from epoll() now, but won't restart the outer loop. | |
1308 | ended = 1; | |
a2d03d52 | 1309 | } |
d853213d | 1310 | |
a2d03d52 MT |
1311 | // Handle timer events |
1312 | } else if (timerfd == fd) { | |
1313 | if (e & EPOLLIN) { | |
335b8a44 MT |
1314 | DEBUG(jail->pakfire, "Timer event received\n"); |
1315 | ||
1316 | // Disarm the timer | |
1317 | r = read(timerfd, garbage, sizeof(garbage)); | |
1318 | if (r < 1) { | |
1319 | ERROR(jail->pakfire, "Could not disarm timer: %m\n"); | |
1320 | r = 1; | |
1321 | goto ERROR; | |
1322 | } | |
1323 | ||
1324 | // Terminate the process if it hasn't already ended | |
1325 | if (!ended) { | |
1326 | DEBUG(jail->pakfire, "Terminating process...\n"); | |
1327 | ||
1328 | // Send SIGTERM to the process | |
f949feac | 1329 | r = pidfd_send_signal(pidfd, SIGKILL, NULL, 0); |
335b8a44 MT |
1330 | if (r) { |
1331 | ERROR(jail->pakfire, "Could not kill process: %m\n"); | |
1332 | goto ERROR; | |
1333 | } | |
1334 | } | |
a2d03d52 | 1335 | } |
335b8a44 | 1336 | |
a2d03d52 MT |
1337 | // Handle socket messages |
1338 | } else if (socket_recv == fd) { | |
1339 | if (e & EPOLLIN) { | |
8f49d254 MT |
1340 | // Receive the passed FD |
1341 | r = pakfire_jail_recv_fd(jail, socket_recv, &fd); | |
1342 | if (r) | |
1343 | goto ERROR; | |
1344 | ||
92f2120e | 1345 | // Setup PTY forwarding |
c40722e3 | 1346 | if (ctx->pty.master.fd < 0) { |
92f2120e MT |
1347 | r = pakfire_jail_setup_pty_forwarding(jail, ctx, epollfd, fd); |
1348 | if (r) { | |
1349 | CTX_ERROR(jail->ctx, "Failed setting up PTY forwarding: %s\n", strerror(-r)); | |
1350 | goto ERROR; | |
1351 | } | |
1352 | } | |
a2d03d52 | 1353 | } |
8f49d254 | 1354 | |
a2d03d52 MT |
1355 | // Handle log INFO messages |
1356 | } else if (log_INFO == fd) { | |
1357 | if (e & EPOLLIN) { | |
1a7eb888 MT |
1358 | r = pakfire_jail_handle_log(jail, ctx, fd, &ctx->buffers.log_INFO, |
1359 | pakfire_jail_log, &ctx->buffers.log_INFO.priority); | |
a2d03d52 MT |
1360 | if (r) |
1361 | goto ERROR; | |
1362 | } | |
8f49d254 | 1363 | |
a2d03d52 MT |
1364 | // Handle log ERROR messages |
1365 | } else if (log_ERROR == fd) { | |
1366 | if (e & EPOLLIN) { | |
1a7eb888 MT |
1367 | r = pakfire_jail_handle_log(jail, ctx, fd, &ctx->buffers.log_ERROR, |
1368 | pakfire_jail_log, &ctx->buffers.log_ERROR.priority); | |
a2d03d52 MT |
1369 | if (r) |
1370 | goto ERROR; | |
e068b964 MT |
1371 | } |
1372 | ||
a2d03d52 MT |
1373 | #ifdef ENABLE_DEBUG |
1374 | // Handle log DEBUG messages | |
1375 | } else if (log_DEBUG == fd) { | |
1376 | if (e & EPOLLIN) { | |
1a7eb888 MT |
1377 | r = pakfire_jail_handle_log(jail, ctx, fd, &ctx->buffers.log_DEBUG, |
1378 | pakfire_jail_log, &ctx->buffers.log_DEBUG.priority); | |
a2d03d52 MT |
1379 | if (r) |
1380 | goto ERROR; | |
1381 | } | |
1382 | #endif /* ENABLE_DEBUG */ | |
1383 | ||
1384 | // Log a message for anything else | |
1385 | } else { | |
1386 | DEBUG(jail->pakfire, "Received invalid file descriptor %d\n", fd); | |
1387 | continue; | |
616f1fca MT |
1388 | } |
1389 | ||
e068b964 MT |
1390 | // Check if any file descriptors have been closed |
1391 | if (e & EPOLLHUP) { | |
1392 | // Remove the file descriptor | |
1393 | r = epoll_ctl(epollfd, EPOLL_CTL_DEL, fd, NULL); | |
1394 | if (r) { | |
1395 | ERROR(jail->pakfire, "Could not remove closed file-descriptor %d: %m\n", fd); | |
1396 | goto ERROR; | |
1397 | } | |
1398 | } | |
616f1fca MT |
1399 | } |
1400 | } | |
1401 | ||
d853213d | 1402 | ERROR: |
dd2d7dbb | 1403 | if (epollfd >= 0) |
616f1fca | 1404 | close(epollfd); |
dd2d7dbb | 1405 | if (timerfd >= 0) |
335b8a44 | 1406 | close(timerfd); |
616f1fca | 1407 | |
690ff87c | 1408 | // Restore any changed terminal attributes |
7ac38d66 MT |
1409 | if (ctx->pty.stdin.fd >= 0) |
1410 | pakfire_jail_restore_attrs(jail, &ctx->pty.stdin); | |
1411 | if (ctx->pty.stdout.fd >= 0) | |
1412 | pakfire_jail_restore_attrs(jail, &ctx->pty.stdout); | |
690ff87c | 1413 | |
616f1fca MT |
1414 | return r; |
1415 | } | |
1416 | ||
04d3c185 MT |
1417 | int pakfire_jail_capture_stdout(struct pakfire_ctx* ctx, struct pakfire_jail* jail, |
1418 | void* data, const char* line, size_t length) { | |
12b9b39f MT |
1419 | char** output = (char**)data; |
1420 | int r; | |
0de6bb30 | 1421 | |
2015cb92 | 1422 | // Append everything from stdout to a buffer |
1a7eb888 MT |
1423 | r = asprintf(output, "%s%.*s", (output && *output) ? *output : "", (int)length, line); |
1424 | if (r < 0) | |
1425 | return -errno; | |
0de6bb30 | 1426 | |
1a7eb888 | 1427 | return 0; |
0de6bb30 MT |
1428 | } |
1429 | ||
980b15af MT |
1430 | // Capabilities |
1431 | ||
e6791c52 MT |
1432 | // Logs all capabilities of the current process |
1433 | static int pakfire_jail_show_capabilities(struct pakfire_jail* jail) { | |
1434 | cap_t caps = NULL; | |
1435 | char* name = NULL; | |
1436 | cap_flag_value_t value_e; | |
1437 | cap_flag_value_t value_i; | |
1438 | cap_flag_value_t value_p; | |
1439 | int r; | |
980b15af | 1440 | |
e6791c52 MT |
1441 | // Fetch PID |
1442 | pid_t pid = getpid(); | |
980b15af | 1443 | |
e6791c52 MT |
1444 | // Fetch all capabilities |
1445 | caps = cap_get_proc(); | |
1446 | if (!caps) { | |
1447 | ERROR(jail->pakfire, "Could not fetch capabilities: %m\n"); | |
1448 | r = 1; | |
1449 | goto ERROR; | |
1450 | } | |
980b15af | 1451 | |
e6791c52 | 1452 | DEBUG(jail->pakfire, "Capabilities of PID %d:\n", pid); |
980b15af | 1453 | |
e6791c52 MT |
1454 | // Iterate over all capabilities |
1455 | for (unsigned int cap = 0; cap_valid(cap); cap++) { | |
1456 | name = cap_to_name(cap); | |
980b15af | 1457 | |
e6791c52 MT |
1458 | // Fetch effective value |
1459 | r = cap_get_flag(caps, cap, CAP_EFFECTIVE, &value_e); | |
1460 | if (r) | |
1461 | goto ERROR; | |
980b15af | 1462 | |
e6791c52 MT |
1463 | // Fetch inheritable value |
1464 | r = cap_get_flag(caps, cap, CAP_INHERITABLE, &value_i); | |
1465 | if (r) | |
1466 | goto ERROR; | |
980b15af | 1467 | |
e6791c52 MT |
1468 | // Fetch permitted value |
1469 | r = cap_get_flag(caps, cap, CAP_PERMITTED, &value_p); | |
1470 | if (r) | |
1471 | goto ERROR; | |
980b15af | 1472 | |
e6791c52 MT |
1473 | DEBUG(jail->pakfire, |
1474 | " %-24s : %c%c%c\n", | |
1475 | name, | |
1476 | (value_e == CAP_SET) ? 'e' : '-', | |
1477 | (value_i == CAP_SET) ? 'i' : '-', | |
1478 | (value_p == CAP_SET) ? 'p' : '-' | |
1479 | ); | |
980b15af | 1480 | |
e6791c52 MT |
1481 | // Free name |
1482 | cap_free(name); | |
1483 | name = NULL; | |
1484 | } | |
980b15af | 1485 | |
e6791c52 MT |
1486 | // Success |
1487 | r = 0; | |
980b15af | 1488 | |
e6791c52 MT |
1489 | ERROR: |
1490 | if (name) | |
1491 | cap_free(name); | |
1492 | if (caps) | |
1493 | cap_free(caps); | |
980b15af | 1494 | |
e6791c52 MT |
1495 | return r; |
1496 | } | |
980b15af | 1497 | |
e6791c52 MT |
1498 | static int pakfire_jail_set_capabilities(struct pakfire_jail* jail) { |
1499 | cap_t caps = NULL; | |
1500 | char* name = NULL; | |
1501 | int r; | |
980b15af | 1502 | |
e6791c52 MT |
1503 | // Fetch capabilities |
1504 | caps = cap_get_proc(); | |
1505 | if (!caps) { | |
1506 | ERROR(jail->pakfire, "Could not read capabilities: %m\n"); | |
1507 | r = 1; | |
1508 | goto ERROR; | |
1509 | } | |
980b15af | 1510 | |
e6791c52 MT |
1511 | // Walk through all capabilities |
1512 | for (cap_value_t cap = 0; cap_valid(cap); cap++) { | |
1513 | cap_value_t _caps[] = { cap }; | |
980b15af | 1514 | |
e6791c52 MT |
1515 | // Fetch the name of the capability |
1516 | name = cap_to_name(cap); | |
980b15af | 1517 | |
e6791c52 MT |
1518 | r = cap_set_flag(caps, CAP_EFFECTIVE, 1, _caps, CAP_SET); |
1519 | if (r) { | |
1520 | ERROR(jail->pakfire, "Could not set %s: %m\n", name); | |
1521 | goto ERROR; | |
1522 | } | |
980b15af | 1523 | |
e6791c52 | 1524 | r = cap_set_flag(caps, CAP_INHERITABLE, 1, _caps, CAP_SET); |
980b15af | 1525 | if (r) { |
e6791c52 MT |
1526 | ERROR(jail->pakfire, "Could not set %s: %m\n", name); |
1527 | goto ERROR; | |
980b15af MT |
1528 | } |
1529 | ||
e6791c52 MT |
1530 | r = cap_set_flag(caps, CAP_PERMITTED, 1, _caps, CAP_SET); |
1531 | if (r) { | |
1532 | ERROR(jail->pakfire, "Could not set %s: %m\n", name); | |
1533 | goto ERROR; | |
1534 | } | |
980b15af | 1535 | |
e6791c52 MT |
1536 | // Free name |
1537 | cap_free(name); | |
1538 | name = NULL; | |
980b15af MT |
1539 | } |
1540 | ||
e6791c52 MT |
1541 | // Restore all capabilities |
1542 | r = cap_set_proc(caps); | |
980b15af | 1543 | if (r) { |
e6791c52 | 1544 | ERROR(jail->pakfire, "Restoring capabilities failed: %m\n"); |
980b15af MT |
1545 | goto ERROR; |
1546 | } | |
1547 | ||
e6791c52 MT |
1548 | // Add all capabilities to the ambient set |
1549 | for (unsigned int cap = 0; cap_valid(cap); cap++) { | |
1550 | name = cap_to_name(cap); | |
1551 | ||
1552 | // Raise the capability | |
1553 | r = prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_RAISE, cap, 0, 0); | |
1554 | if (r) { | |
1555 | ERROR(jail->pakfire, "Could not set ambient capability %s: %m\n", name); | |
1556 | goto ERROR; | |
1557 | } | |
1558 | ||
1559 | // Free name | |
1560 | cap_free(name); | |
1561 | name = NULL; | |
980b15af MT |
1562 | } |
1563 | ||
e6791c52 MT |
1564 | // Success |
1565 | r = 0; | |
1566 | ||
980b15af | 1567 | ERROR: |
e6791c52 MT |
1568 | if (name) |
1569 | cap_free(name); | |
980b15af MT |
1570 | if (caps) |
1571 | cap_free(caps); | |
1572 | ||
1573 | return r; | |
1574 | } | |
1575 | ||
739d5b57 MT |
1576 | // Syscall Filter |
1577 | ||
1578 | static int pakfire_jail_limit_syscalls(struct pakfire_jail* jail) { | |
1579 | const int syscalls[] = { | |
1580 | // The kernel's keyring isn't namespaced | |
1581 | SCMP_SYS(keyctl), | |
1582 | SCMP_SYS(add_key), | |
1583 | SCMP_SYS(request_key), | |
1584 | ||
1585 | // Disable userfaultfd | |
1586 | SCMP_SYS(userfaultfd), | |
1587 | ||
1588 | // Disable perf which could leak a lot of information about the host | |
1589 | SCMP_SYS(perf_event_open), | |
1590 | ||
1591 | 0, | |
1592 | }; | |
1593 | int r = 1; | |
1594 | ||
1595 | DEBUG(jail->pakfire, "Applying syscall filter...\n"); | |
1596 | ||
1597 | // Setup a syscall filter which allows everything by default | |
1598 | scmp_filter_ctx ctx = seccomp_init(SCMP_ACT_ALLOW); | |
1599 | if (!ctx) { | |
1600 | ERROR(jail->pakfire, "Could not setup seccomp filter: %m\n"); | |
1601 | goto ERROR; | |
1602 | } | |
1603 | ||
1604 | // All all syscalls | |
1605 | for (const int* syscall = syscalls; *syscall; syscall++) { | |
1606 | r = seccomp_rule_add(ctx, SCMP_ACT_ERRNO(EPERM), *syscall, 0); | |
1607 | if (r) { | |
1608 | ERROR(jail->pakfire, "Could not configure syscall %d: %m\n", *syscall); | |
1609 | goto ERROR; | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | // Load syscall filter into the kernel | |
1614 | r = seccomp_load(ctx); | |
1615 | if (r) { | |
1616 | ERROR(jail->pakfire, "Could not load syscall filter into the kernel: %m\n"); | |
1617 | goto ERROR; | |
1618 | } | |
1619 | ||
1620 | ERROR: | |
1621 | if (ctx) | |
1622 | seccomp_release(ctx); | |
1623 | ||
1624 | return r; | |
1625 | } | |
1626 | ||
cc6e2264 MT |
1627 | // Mountpoints |
1628 | ||
061223f7 | 1629 | PAKFIRE_EXPORT int pakfire_jail_bind(struct pakfire_jail* jail, |
cc6e2264 MT |
1630 | const char* source, const char* target, int flags) { |
1631 | struct pakfire_jail_mountpoint* mp = NULL; | |
1632 | int r; | |
1633 | ||
1634 | // Check if there is any space left | |
1635 | if (jail->num_mountpoints >= MAX_MOUNTPOINTS) { | |
1636 | errno = ENOSPC; | |
1637 | return 1; | |
1638 | } | |
1639 | ||
1640 | // Check for valid inputs | |
1641 | if (!source || !target) { | |
1642 | errno = EINVAL; | |
1643 | return 1; | |
1644 | } | |
1645 | ||
1646 | // Select the next free slot | |
1647 | mp = &jail->mountpoints[jail->num_mountpoints]; | |
1648 | ||
1649 | // Copy source | |
1650 | r = pakfire_string_set(mp->source, source); | |
a60955af | 1651 | if (r) { |
cc6e2264 | 1652 | ERROR(jail->pakfire, "Could not copy source: %m\n"); |
a60955af | 1653 | return r; |
cc6e2264 MT |
1654 | } |
1655 | ||
1656 | // Copy target | |
1657 | r = pakfire_string_set(mp->target, target); | |
a60955af | 1658 | if (r) { |
cc6e2264 | 1659 | ERROR(jail->pakfire, "Could not copy target: %m\n"); |
a60955af | 1660 | return r; |
cc6e2264 MT |
1661 | } |
1662 | ||
1663 | // Copy flags | |
1664 | mp->flags = flags; | |
1665 | ||
1666 | // Increment counter | |
1667 | jail->num_mountpoints++; | |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
7bdf1d8e MT |
1672 | static int pakfire_jail_mount_networking(struct pakfire_jail* jail) { |
1673 | int r; | |
1674 | ||
1675 | const char* paths[] = { | |
1676 | "/etc/hosts", | |
1677 | "/etc/resolv.conf", | |
1678 | NULL, | |
1679 | }; | |
1680 | ||
1681 | // Bind-mount all paths read-only | |
1682 | for (const char** path = paths; *path; path++) { | |
1683 | r = pakfire_bind(jail->pakfire, *path, NULL, MS_RDONLY); | |
693a979a MT |
1684 | if (r) { |
1685 | switch (errno) { | |
1686 | // Ignore if we don't have permission | |
1687 | case EPERM: | |
1688 | continue; | |
1689 | ||
1690 | default: | |
1691 | break; | |
1692 | } | |
7bdf1d8e | 1693 | return r; |
693a979a | 1694 | } |
7bdf1d8e MT |
1695 | } |
1696 | ||
1697 | return 0; | |
1698 | } | |
1699 | ||
cc6e2264 MT |
1700 | /* |
1701 | Mounts everything that we require in the new namespace | |
1702 | */ | |
7bdf1d8e | 1703 | static int pakfire_jail_mount(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx) { |
cc6e2264 | 1704 | struct pakfire_jail_mountpoint* mp = NULL; |
282b732a | 1705 | int flags = 0; |
cc6e2264 MT |
1706 | int r; |
1707 | ||
282b732a MT |
1708 | // Enable loop devices |
1709 | if (pakfire_jail_exec_has_flag(ctx, PAKFIRE_JAIL_HAS_LOOP_DEVICES)) | |
1710 | flags |= PAKFIRE_MOUNT_LOOP_DEVICES; | |
1711 | ||
cc6e2264 | 1712 | // Mount all default stuff |
b2ccb363 MT |
1713 | r = pakfire_mount_all(jail->pakfire, PAKFIRE_MNTNS_OUTER, flags); |
1714 | if (r) | |
1715 | return r; | |
1716 | ||
1717 | // Populate /dev | |
1718 | r = pakfire_populate_dev(jail->pakfire, flags); | |
1719 | if (r) | |
1720 | return r; | |
1721 | ||
1722 | // Mount the interpreter (if needed) | |
1723 | r = pakfire_mount_interpreter(jail->pakfire); | |
cc6e2264 MT |
1724 | if (r) |
1725 | return r; | |
1726 | ||
7bdf1d8e MT |
1727 | // Mount networking stuff |
1728 | if (pakfire_jail_exec_has_flag(ctx, PAKFIRE_JAIL_HAS_NETWORKING)) { | |
1729 | r = pakfire_jail_mount_networking(jail); | |
1730 | if (r) | |
1731 | return r; | |
1732 | } | |
1733 | ||
cc6e2264 MT |
1734 | // Mount all custom stuff |
1735 | for (unsigned int i = 0; i < jail->num_mountpoints; i++) { | |
1736 | // Fetch mountpoint | |
1737 | mp = &jail->mountpoints[i]; | |
1738 | ||
1739 | // Mount it | |
1740 | r = pakfire_bind(jail->pakfire, mp->source, mp->target, mp->flags); | |
1741 | if (r) | |
1742 | return r; | |
1743 | } | |
1744 | ||
cc6e2264 MT |
1745 | return 0; |
1746 | } | |
1747 | ||
fec79a33 MT |
1748 | // Networking |
1749 | ||
1750 | static int pakfire_jail_setup_loopback(struct pakfire_jail* jail) { | |
1751 | struct nl_sock* nl = NULL; | |
1752 | struct nl_cache* cache = NULL; | |
1753 | struct rtnl_link* link = NULL; | |
1754 | struct rtnl_link* change = NULL; | |
1755 | int r; | |
1756 | ||
1757 | DEBUG(jail->pakfire, "Setting up loopback...\n"); | |
1758 | ||
1759 | // Allocate a netlink socket | |
1760 | nl = nl_socket_alloc(); | |
1761 | if (!nl) { | |
1762 | ERROR(jail->pakfire, "Could not allocate a netlink socket: %m\n"); | |
1763 | r = 1; | |
1764 | goto ERROR; | |
1765 | } | |
1766 | ||
1767 | // Connect the socket | |
1768 | r = nl_connect(nl, NETLINK_ROUTE); | |
1769 | if (r) { | |
1770 | ERROR(jail->pakfire, "Could not connect netlink socket: %s\n", nl_geterror(r)); | |
1771 | goto ERROR; | |
1772 | } | |
1773 | ||
1774 | // Allocate the netlink cache | |
1775 | r = rtnl_link_alloc_cache(nl, AF_UNSPEC, &cache); | |
1776 | if (r < 0) { | |
1777 | ERROR(jail->pakfire, "Unable to allocate netlink cache: %s\n", nl_geterror(r)); | |
1778 | goto ERROR; | |
1779 | } | |
1780 | ||
1781 | // Fetch loopback interface | |
1782 | link = rtnl_link_get_by_name(cache, "lo"); | |
1783 | if (!link) { | |
1784 | ERROR(jail->pakfire, "Could not find lo interface. Ignoring.\n"); | |
1785 | r = 0; | |
1786 | goto ERROR; | |
1787 | } | |
1788 | ||
1789 | // Allocate a new link | |
1790 | change = rtnl_link_alloc(); | |
1791 | if (!change) { | |
1792 | ERROR(jail->pakfire, "Could not allocate change link\n"); | |
1793 | r = 1; | |
1794 | goto ERROR; | |
1795 | } | |
1796 | ||
1797 | // Set the link to UP | |
1798 | rtnl_link_set_flags(change, IFF_UP); | |
1799 | ||
1800 | // Apply any changes | |
1801 | r = rtnl_link_change(nl, link, change, 0); | |
1802 | if (r) { | |
1803 | ERROR(jail->pakfire, "Unable to activate loopback: %s\n", nl_geterror(r)); | |
1804 | goto ERROR; | |
1805 | } | |
1806 | ||
1807 | // Success | |
1808 | r = 0; | |
1809 | ||
1810 | ERROR: | |
1811 | if (nl) | |
1812 | nl_socket_free(nl); | |
1813 | ||
1814 | return r; | |
1815 | } | |
1816 | ||
679ee2fa MT |
1817 | // UID/GID Mapping |
1818 | ||
679ee2fa MT |
1819 | static int pakfire_jail_setup_uid_mapping(struct pakfire_jail* jail, pid_t pid) { |
1820 | char path[PATH_MAX]; | |
1821 | int r; | |
1822 | ||
4896e62c MT |
1823 | // Skip mapping anything when running on / |
1824 | if (pakfire_on_root(jail->pakfire)) | |
1825 | return 0; | |
0f7f068b | 1826 | |
abe4ee37 MT |
1827 | // Make path |
1828 | r = pakfire_string_format(path, "/proc/%d/uid_map", pid); | |
1829 | if (r) | |
1830 | return r; | |
1831 | ||
1832 | // Fetch UID | |
1833 | const uid_t uid = pakfire_uid(jail->pakfire); | |
1834 | ||
4896e62c | 1835 | // Fetch SUBUID |
a1ff2863 | 1836 | const struct pakfire_subid* subuid = pakfire_subuid(jail->pakfire); |
4896e62c MT |
1837 | if (!subuid) |
1838 | return 1; | |
679ee2fa | 1839 | |
abe4ee37 | 1840 | /* When running as root, we will map the entire range. |
679ee2fa | 1841 | |
abe4ee37 MT |
1842 | When running as a non-privileged user, we will map the root user inside the jail |
1843 | to the user's UID outside of the jail, and we will map the rest starting from one. | |
1844 | */ | |
679ee2fa | 1845 | |
abe4ee37 MT |
1846 | // Running as root |
1847 | if (uid == 0) { | |
1848 | r = pakfire_file_write(jail->pakfire, path, 0, 0, 0, | |
1849 | "0 %lu %lu\n", subuid->id, subuid->length); | |
1850 | } else { | |
1851 | r = pakfire_file_write(jail->pakfire, path, 0, 0, 0, | |
b64888fa | 1852 | "0 %lu 1\n1 %lu %lu\n", uid, subuid->id, subuid->length); |
abe4ee37 MT |
1853 | } |
1854 | ||
1855 | if (r) { | |
1856 | ERROR(jail->pakfire, "Could not map UIDs: %m\n"); | |
1857 | return r; | |
1858 | } | |
1859 | ||
1860 | return r; | |
679ee2fa MT |
1861 | } |
1862 | ||
1863 | static int pakfire_jail_setup_gid_mapping(struct pakfire_jail* jail, pid_t pid) { | |
1864 | char path[PATH_MAX]; | |
1865 | int r; | |
1866 | ||
4896e62c MT |
1867 | // Skip mapping anything when running on / |
1868 | if (pakfire_on_root(jail->pakfire)) | |
1869 | return 0; | |
0f7f068b | 1870 | |
abe4ee37 MT |
1871 | // Fetch GID |
1872 | const gid_t gid = pakfire_gid(jail->pakfire); | |
1873 | ||
4896e62c | 1874 | // Fetch SUBGID |
a1ff2863 | 1875 | const struct pakfire_subid* subgid = pakfire_subgid(jail->pakfire); |
4896e62c MT |
1876 | if (!subgid) |
1877 | return 1; | |
679ee2fa MT |
1878 | |
1879 | // Make path | |
1880 | r = pakfire_string_format(path, "/proc/%d/gid_map", pid); | |
a60955af MT |
1881 | if (r) |
1882 | return r; | |
679ee2fa | 1883 | |
abe4ee37 MT |
1884 | // Running as root |
1885 | if (gid == 0) { | |
1886 | r = pakfire_file_write(jail->pakfire, path, 0, 0, 0, | |
1887 | "0 %lu %lu\n", subgid->id, subgid->length); | |
1888 | } else { | |
1889 | r = pakfire_file_write(jail->pakfire, path, 0, 0, 0, | |
b9a1d857 | 1890 | "0 %lu 1\n1 %lu %lu\n", gid, subgid->id, subgid->length); |
abe4ee37 | 1891 | } |
679ee2fa | 1892 | |
abe4ee37 MT |
1893 | if (r) { |
1894 | ERROR(jail->pakfire, "Could not map GIDs: %m\n"); | |
1895 | return r; | |
1896 | } | |
1897 | ||
1898 | return r; | |
679ee2fa MT |
1899 | } |
1900 | ||
78d7488a MT |
1901 | static int pakfire_jail_setgroups(struct pakfire_jail* jail, pid_t pid) { |
1902 | char path[PATH_MAX]; | |
fe30bb0a | 1903 | int r; |
78d7488a MT |
1904 | |
1905 | // Make path | |
1906 | r = pakfire_string_format(path, "/proc/%d/setgroups", pid); | |
a60955af MT |
1907 | if (r) |
1908 | return r; | |
78d7488a | 1909 | |
fe30bb0a | 1910 | r = pakfire_file_write(jail->pakfire, path, 0, 0, 0, "deny\n"); |
78d7488a | 1911 | if (r) { |
fe30bb0a MT |
1912 | CTX_ERROR(jail->ctx, "Could not set setgroups to deny: %s\n", strerror(errno)); |
1913 | r = -errno; | |
78d7488a MT |
1914 | } |
1915 | ||
78d7488a MT |
1916 | return r; |
1917 | } | |
1918 | ||
43dc0e16 | 1919 | static int pakfire_jail_send_signal(struct pakfire_jail* jail, int fd) { |
743f449e MT |
1920 | const uint64_t val = 1; |
1921 | int r = 0; | |
43dc0e16 MT |
1922 | |
1923 | DEBUG(jail->pakfire, "Sending signal...\n"); | |
1924 | ||
743f449e | 1925 | // Write to the file descriptor |
a87c52e2 MT |
1926 | r = eventfd_write(fd, val); |
1927 | if (r < 0) { | |
1928 | ERROR(jail->pakfire, "Could not send signal: %s\n", strerror(errno)); | |
1929 | r = -errno; | |
743f449e MT |
1930 | } |
1931 | ||
1932 | // Close the file descriptor | |
43dc0e16 MT |
1933 | close(fd); |
1934 | ||
743f449e | 1935 | return r; |
43dc0e16 MT |
1936 | } |
1937 | ||
1938 | static int pakfire_jail_wait_for_signal(struct pakfire_jail* jail, int fd) { | |
743f449e MT |
1939 | uint64_t val = 0; |
1940 | int r = 0; | |
43dc0e16 MT |
1941 | |
1942 | DEBUG(jail->pakfire, "Waiting for signal...\n"); | |
1943 | ||
a87c52e2 MT |
1944 | r = eventfd_read(fd, &val); |
1945 | if (r < 0) { | |
1946 | ERROR(jail->pakfire, "Error waiting for signal: %s\n", strerror(errno)); | |
1947 | r = -errno; | |
743f449e MT |
1948 | } |
1949 | ||
1950 | // Close the file descriptor | |
43dc0e16 MT |
1951 | close(fd); |
1952 | ||
743f449e | 1953 | return r; |
43dc0e16 MT |
1954 | } |
1955 | ||
f949feac MT |
1956 | /* |
1957 | Performs the initialisation that needs to happen in the parent part | |
1958 | */ | |
1959 | static int pakfire_jail_parent(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx) { | |
1960 | int r; | |
1961 | ||
1962 | // Setup UID mapping | |
1963 | r = pakfire_jail_setup_uid_mapping(jail, ctx->pid); | |
1964 | if (r) | |
1965 | return r; | |
1966 | ||
1967 | // Write "deny" to /proc/PID/setgroups | |
1968 | r = pakfire_jail_setgroups(jail, ctx->pid); | |
1969 | if (r) | |
1970 | return r; | |
1971 | ||
1972 | // Setup GID mapping | |
1973 | r = pakfire_jail_setup_gid_mapping(jail, ctx->pid); | |
1974 | if (r) | |
1975 | return r; | |
1976 | ||
1977 | // Parent has finished initialisation | |
1978 | DEBUG(jail->pakfire, "Parent has finished initialization\n"); | |
1979 | ||
1980 | // Send signal to client | |
1981 | r = pakfire_jail_send_signal(jail, ctx->completed_fd); | |
1982 | if (r) | |
1983 | return r; | |
1984 | ||
1985 | return 0; | |
1986 | } | |
1987 | ||
14df7388 MT |
1988 | static int pakfire_jail_switch_root(struct pakfire_jail* jail, const char* root) { |
1989 | int r; | |
1990 | ||
1991 | // Change to the new root | |
1992 | r = chdir(root); | |
1993 | if (r) { | |
1994 | ERROR(jail->pakfire, "chdir(%s) failed: %m\n", root); | |
1995 | return r; | |
1996 | } | |
1997 | ||
1998 | // Switch Root! | |
1999 | r = pivot_root(".", "."); | |
2000 | if (r) { | |
2001 | ERROR(jail->pakfire, "Failed changing into the new root directory %s: %m\n", root); | |
2002 | return r; | |
2003 | } | |
2004 | ||
2005 | // Umount the old root | |
2006 | r = umount2(".", MNT_DETACH); | |
2007 | if (r) { | |
2008 | ERROR(jail->pakfire, "Could not umount the old root filesystem: %m\n"); | |
2009 | return r; | |
2010 | } | |
2011 | ||
2012 | return 0; | |
2013 | } | |
2014 | ||
374e6268 MT |
2015 | static int pakfire_jail_open_pty(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx) { |
2016 | int r; | |
2017 | ||
2018 | // Allocate a new PTY | |
c40722e3 MT |
2019 | ctx->pty.master.fd = posix_openpt(O_RDWR|O_NONBLOCK|O_NOCTTY|O_CLOEXEC); |
2020 | if (ctx->pty.master.fd < 0) | |
374e6268 MT |
2021 | return -errno; |
2022 | ||
2023 | // Fetch the path | |
c40722e3 | 2024 | r = ptsname_r(ctx->pty.master.fd, ctx->pty.console, sizeof(ctx->pty.console)); |
374e6268 MT |
2025 | if (r) |
2026 | return -r; | |
2027 | ||
c40722e3 | 2028 | CTX_DEBUG(jail->ctx, "Allocated console at %s (%d)\n", ctx->pty.console, ctx->pty.master.fd); |
374e6268 | 2029 | |
c15801c7 MT |
2030 | // Unlock the master device |
2031 | r = unlockpt(ctx->pty.master.fd); | |
2032 | if (r) { | |
2033 | CTX_ERROR(jail->ctx, "Could not unlock the PTY: %s\n", strerror(errno)); | |
2034 | return -errno; | |
2035 | } | |
2036 | ||
374e6268 | 2037 | // Create a symlink |
c15801c7 | 2038 | r = pakfire_symlink(jail->ctx, ctx->pty.console, "/dev/console"); |
374e6268 MT |
2039 | if (r) |
2040 | return r; | |
2041 | ||
2042 | return r; | |
2043 | } | |
374e6268 | 2044 | |
c15801c7 MT |
2045 | static int pakfire_jail_setup_terminal(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx) { |
2046 | int fd; | |
2047 | int r; | |
2048 | ||
2049 | // Open a new terminal | |
2050 | fd = open("/dev/console", O_RDWR|O_NOCTTY); | |
2051 | if (fd < 0) { | |
2052 | CTX_ERROR(jail->ctx, "Failed to open a new terminal: %s\n", strerror(errno)); | |
2053 | return -errno; | |
2054 | } | |
2055 | ||
2056 | CTX_DEBUG(jail->ctx, "Opened a new terminal %d\n", fd); | |
2057 | ||
2058 | // Connect the new terminal to standard input | |
2059 | r = dup2(fd, STDIN_FILENO); | |
2060 | if (r < 0) { | |
2061 | CTX_ERROR(jail->ctx, "Failed to open standard input: %s\n", strerror(errno)); | |
2062 | return -errno; | |
2063 | } | |
2064 | ||
2065 | // Connect the new terminal to standard output | |
2066 | r = dup2(fd, STDOUT_FILENO); | |
2067 | if (r < 0) { | |
2068 | CTX_ERROR(jail->ctx, "Failed to open standard output: %s\n", strerror(errno)); | |
2069 | return -errno; | |
2070 | } | |
2071 | ||
2072 | // Connect the new terminal to standard error | |
2073 | r = dup2(fd, STDERR_FILENO); | |
2074 | if (r < 0) { | |
2075 | CTX_ERROR(jail->ctx, "Failed to open standard error: %s\n", strerror(errno)); | |
2076 | return -errno; | |
2077 | } | |
2078 | ||
2079 | return 0; | |
2080 | } | |
2081 | ||
f949feac MT |
2082 | static int pakfire_jail_child(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx, |
2083 | const char* argv[]) { | |
43dc0e16 MT |
2084 | int r; |
2085 | ||
f949feac MT |
2086 | // Redirect any logging to our log pipe |
2087 | pakfire_ctx_set_log_callback(jail->ctx, pakfire_jail_log_redirect, &ctx->pipes); | |
0bd84dc1 | 2088 | |
f949feac MT |
2089 | // Fetch my own PID |
2090 | pid_t pid = getpid(); | |
9b171c6a | 2091 | |
f949feac | 2092 | DEBUG(jail->pakfire, "Launched child process in jail with PID %d\n", pid); |
9b171c6a | 2093 | |
f949feac MT |
2094 | // Wait for the parent to finish initialization |
2095 | r = pakfire_jail_wait_for_signal(jail, ctx->completed_fd); | |
43dc0e16 MT |
2096 | if (r) |
2097 | return r; | |
2098 | ||
f949feac MT |
2099 | // Die with parent |
2100 | r = prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); | |
2101 | if (r) { | |
2102 | ERROR(jail->pakfire, "Could not configure to die with parent: %m\n"); | |
2103 | return 126; | |
2104 | } | |
9b171c6a | 2105 | |
90503c53 MT |
2106 | // Make this process dumpable |
2107 | r = prctl (PR_SET_DUMPABLE, 1, 0, 0, 0); | |
2108 | if (r) { | |
f949feac | 2109 | ERROR(jail->pakfire, "Could not make the process dumpable: %m\n"); |
90503c53 MT |
2110 | return 126; |
2111 | } | |
2112 | ||
2113 | // Don't drop any capabilities on setuid() | |
2114 | r = prctl(PR_SET_KEEPCAPS, 1); | |
2115 | if (r) { | |
f949feac | 2116 | ERROR(jail->pakfire, "Could not set PR_SET_KEEPCAPS: %m\n"); |
90503c53 MT |
2117 | return 126; |
2118 | } | |
4f59c39b MT |
2119 | |
2120 | // Fetch UID/GID | |
2121 | uid_t uid = getuid(); | |
2122 | gid_t gid = getgid(); | |
2123 | ||
2124 | // Fetch EUID/EGID | |
2125 | uid_t euid = geteuid(); | |
2126 | gid_t egid = getegid(); | |
2127 | ||
a8a41064 MT |
2128 | DEBUG(jail->pakfire, " UID: %u (effective %u)\n", uid, euid); |
2129 | DEBUG(jail->pakfire, " GID: %u (effective %u)\n", gid, egid); | |
4f59c39b | 2130 | |
7f572522 MT |
2131 | // Log all mountpoints |
2132 | pakfire_mount_list(jail->ctx); | |
2133 | ||
9b171c6a MT |
2134 | // Fail if we are not PID 1 |
2135 | if (pid != 1) { | |
2136 | CTX_ERROR(jail->ctx, "Child process is not PID 1\n"); | |
3a9f6931 | 2137 | return 126; |
9b171c6a MT |
2138 | } |
2139 | ||
2140 | // Fail if we are not running as root | |
4f719e21 | 2141 | if (uid || gid || euid || egid) { |
4f59c39b | 2142 | ERROR(jail->pakfire, "Child process is not running as root\n"); |
3a9f6931 | 2143 | return 126; |
4f59c39b MT |
2144 | } |
2145 | ||
92f2120e MT |
2146 | const int socket_send = pakfire_jail_get_pipe_to_write(jail, &ctx->socket); |
2147 | ||
b2ccb363 MT |
2148 | // Mount all default stuff |
2149 | r = pakfire_mount_all(jail->pakfire, PAKFIRE_MNTNS_INNER, 0); | |
2150 | if (r) | |
2151 | return 126; | |
2152 | ||
f949feac | 2153 | const char* root = pakfire_get_path(jail->pakfire); |
652f2a99 | 2154 | const char* arch = pakfire_get_effective_arch(jail->pakfire); |
4f59c39b | 2155 | |
f949feac MT |
2156 | // Change mount propagation to slave to receive anything from the parent namespace |
2157 | r = pakfire_mount_change_propagation(jail->ctx, "/", MS_SLAVE); | |
2158 | if (r) | |
2159 | return r; | |
2160 | ||
2161 | // Make root a mountpoint in the new mount namespace | |
2162 | r = pakfire_mount_make_mounpoint(jail->pakfire, root); | |
2163 | if (r) | |
2164 | return r; | |
2165 | ||
2166 | // Change mount propagation to private | |
2167 | r = pakfire_mount_change_propagation(jail->ctx, root, MS_PRIVATE); | |
2168 | if (r) | |
2169 | return r; | |
2170 | ||
2171 | // Change root (unless root is /) | |
2172 | if (!pakfire_on_root(jail->pakfire)) { | |
2173 | // Mount everything | |
2174 | r = pakfire_jail_mount(jail, ctx); | |
2175 | if (r) | |
2176 | return r; | |
2177 | ||
2178 | // chroot() | |
2179 | r = pakfire_jail_switch_root(jail, root); | |
2180 | if (r) | |
2181 | return r; | |
2182 | } | |
2183 | ||
90d92b5c MT |
2184 | // Set personality |
2185 | unsigned long persona = pakfire_arch_personality(arch); | |
2186 | if (persona) { | |
2187 | r = personality(persona); | |
2188 | if (r < 0) { | |
2189 | ERROR(jail->pakfire, "Could not set personality (%x)\n", (unsigned int)persona); | |
f949feac | 2190 | return 1; |
90d92b5c MT |
2191 | } |
2192 | } | |
2193 | ||
fec79a33 MT |
2194 | // Setup networking |
2195 | if (!pakfire_jail_exec_has_flag(ctx, PAKFIRE_JAIL_HAS_NETWORKING)) { | |
2196 | r = pakfire_jail_setup_loopback(jail); | |
2197 | if (r) | |
2198 | return 1; | |
2199 | } | |
2200 | ||
cf440db8 MT |
2201 | // Set nice level |
2202 | if (jail->nice) { | |
2203 | DEBUG(jail->pakfire, "Setting nice level to %d\n", jail->nice); | |
2204 | ||
2205 | r = setpriority(PRIO_PROCESS, pid, jail->nice); | |
2206 | if (r) { | |
2207 | ERROR(jail->pakfire, "Could not set nice level: %m\n"); | |
2208 | return 1; | |
2209 | } | |
2210 | } | |
2211 | ||
92f2120e MT |
2212 | // Create a new session |
2213 | r = setsid(); | |
2214 | if (r < 0) { | |
2215 | CTX_ERROR(jail->ctx, "Could not create a new session: %s\n", strerror(errno)); | |
2216 | return r; | |
2217 | } | |
92f2120e MT |
2218 | |
2219 | // Allocate a new PTY | |
2220 | r = pakfire_jail_open_pty(jail, ctx); | |
2221 | if (r) { | |
2222 | CTX_ERROR(jail->ctx, "Could not allocate a new PTY: %s\n", strerror(-r)); | |
2223 | return r; | |
2224 | } | |
2225 | ||
2226 | // Send the PTY master to the parent process | |
c40722e3 | 2227 | r = pakfire_jail_send_fd(jail, socket_send, ctx->pty.master.fd); |
92f2120e MT |
2228 | if (r) { |
2229 | CTX_ERROR(jail->ctx, "Failed sending the PTY master to the parent: %s\n", strerror(-r)); | |
2230 | return r; | |
2231 | } | |
2232 | ||
c15801c7 MT |
2233 | // Setup the terminal |
2234 | r = pakfire_jail_setup_terminal(jail, ctx); | |
2235 | if (r) | |
2236 | return r; | |
2237 | ||
92f2120e | 2238 | // Close the master of the PTY |
c40722e3 MT |
2239 | close(ctx->pty.master.fd); |
2240 | ctx->pty.master.fd = -1; | |
92f2120e MT |
2241 | |
2242 | // Close the socket | |
2243 | close(socket_send); | |
2244 | ||
e33387d3 MT |
2245 | // Close other end of log pipes |
2246 | close(ctx->pipes.log_INFO[0]); | |
2247 | close(ctx->pipes.log_ERROR[0]); | |
2248 | #ifdef ENABLE_DEBUG | |
2249 | close(ctx->pipes.log_DEBUG[0]); | |
2250 | #endif /* ENABLE_DEBUG */ | |
2251 | ||
007bc66c MT |
2252 | // Reset open file limit (http://0pointer.net/blog/file-descriptor-limits.html) |
2253 | r = pakfire_rlimit_reset_nofile(jail->pakfire); | |
2254 | if (r) | |
2255 | return r; | |
2256 | ||
e6791c52 MT |
2257 | // Set capabilities |
2258 | r = pakfire_jail_set_capabilities(jail); | |
2259 | if (r) | |
2260 | return r; | |
2261 | ||
2262 | // Show capabilities | |
2263 | r = pakfire_jail_show_capabilities(jail); | |
980b15af MT |
2264 | if (r) |
2265 | return r; | |
2266 | ||
739d5b57 MT |
2267 | // Filter syscalls |
2268 | r = pakfire_jail_limit_syscalls(jail); | |
2269 | if (r) | |
2270 | return r; | |
2271 | ||
f949feac MT |
2272 | DEBUG(jail->pakfire, "Child process initialization done\n"); |
2273 | DEBUG(jail->pakfire, "Launching command:\n"); | |
2015cb92 MT |
2274 | |
2275 | // Log argv | |
2276 | for (unsigned int i = 0; argv[i]; i++) | |
f949feac | 2277 | DEBUG(jail->pakfire, " argv[%u] = %s\n", i, argv[i]); |
2015cb92 | 2278 | |
b3498aeb MT |
2279 | // exec() command |
2280 | r = execvpe(argv[0], (char**)argv, jail->env); | |
9fa1afb6 MT |
2281 | if (r < 0) { |
2282 | // Translate errno into regular exit code | |
2283 | switch (errno) { | |
2284 | case ENOENT: | |
2285 | // Ignore if the command doesn't exist | |
2286 | if (ctx->flags & PAKFIRE_JAIL_NOENT_OK) | |
2287 | r = 0; | |
2288 | else | |
2289 | r = 127; | |
b3498aeb | 2290 | |
9fa1afb6 | 2291 | break; |
b3498aeb | 2292 | |
9fa1afb6 MT |
2293 | default: |
2294 | r = 1; | |
2295 | } | |
2296 | ||
f949feac | 2297 | ERROR(jail->pakfire, "Could not execve(%s): %m\n", argv[0]); |
b3498aeb MT |
2298 | } |
2299 | ||
2300 | // We should not get here | |
2301 | return r; | |
0bd84dc1 MT |
2302 | } |
2303 | ||
9f50bf71 | 2304 | // Run a command in the jail |
9a3be06d | 2305 | PAKFIRE_EXPORT int pakfire_jail_exec(struct pakfire_jail* jail, const char* argv[], int flags) { |
f949feac | 2306 | int exit = -1; |
0bd84dc1 MT |
2307 | int r; |
2308 | ||
b3498aeb MT |
2309 | // Check if argv is valid |
2310 | if (!argv || !argv[0]) { | |
2311 | errno = EINVAL; | |
2312 | return -1; | |
2313 | } | |
2314 | ||
616f1fca MT |
2315 | // Initialize context for this call |
2316 | struct pakfire_jail_exec ctx = { | |
9fa1afb6 | 2317 | .flags = flags, |
7bdf1d8e | 2318 | |
8f49d254 MT |
2319 | .socket = { -1, -1 }, |
2320 | ||
616f1fca | 2321 | .pipes = { |
4c3bab92 MT |
2322 | .log_INFO = { -1, -1 }, |
2323 | .log_ERROR = { -1, -1 }, | |
6ac51607 | 2324 | #ifdef ENABLE_DEBUG |
4c3bab92 | 2325 | .log_DEBUG = { -1, -1 }, |
6ac51607 | 2326 | #endif /* ENABLE_DEBUG */ |
2015cb92 MT |
2327 | }, |
2328 | ||
1a7eb888 MT |
2329 | .buffers = { |
2330 | .log_INFO = { | |
2331 | .priority = LOG_INFO, | |
2332 | }, | |
2333 | ||
2334 | .log_ERROR = { | |
2335 | .priority = LOG_ERR, | |
2336 | }, | |
2337 | ||
2338 | #ifdef ENABLE_DEBUG | |
2339 | .log_DEBUG = { | |
2340 | .priority = LOG_DEBUG, | |
2341 | }, | |
2342 | #endif /* ENABLE_DEBUG */ | |
616f1fca | 2343 | }, |
d2eaf8dc | 2344 | |
f949feac | 2345 | .pidfd = -1, |
92f2120e | 2346 | |
c40722e3 MT |
2347 | // PTY |
2348 | .pty = { | |
2349 | .master = { | |
2350 | .fd = -1, | |
2351 | }, | |
2352 | .stdin = { | |
2353 | .fd = -1, | |
2354 | }, | |
2355 | .stdout = { | |
2356 | .fd = -1, | |
2357 | }, | |
2358 | }, | |
616f1fca MT |
2359 | }; |
2360 | ||
0bd84dc1 MT |
2361 | DEBUG(jail->pakfire, "Executing jail...\n"); |
2362 | ||
7bdf1d8e | 2363 | // Enable networking in interactive mode |
1190bb5f | 2364 | if (ctx.flags & PAKFIRE_JAIL_PTY_FORWARDING) |
7bdf1d8e MT |
2365 | ctx.flags |= PAKFIRE_JAIL_HAS_NETWORKING; |
2366 | ||
43dc0e16 MT |
2367 | /* |
2368 | Setup a file descriptor which can be used to notify the client that the parent | |
2369 | has completed configuration. | |
2370 | */ | |
f7d240a7 MT |
2371 | ctx.completed_fd = eventfd(0, EFD_CLOEXEC); |
2372 | if (ctx.completed_fd < 0) { | |
43dc0e16 MT |
2373 | ERROR(jail->pakfire, "eventfd() failed: %m\n"); |
2374 | return -1; | |
2375 | } | |
2376 | ||
8f49d254 MT |
2377 | // Create a UNIX domain socket |
2378 | r = socketpair(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, ctx.socket); | |
2379 | if (r < 0) { | |
2380 | CTX_ERROR(jail->ctx, "Could not create UNIX socket: %s\n", strerror(errno)); | |
2381 | r = -errno; | |
2382 | goto ERROR; | |
2383 | } | |
2384 | ||
e33387d3 MT |
2385 | // Setup pipes for logging |
2386 | // INFO | |
2387 | r = pakfire_jail_setup_pipe(jail, &ctx.pipes.log_INFO, O_CLOEXEC); | |
2388 | if (r) | |
2389 | goto ERROR; | |
2390 | ||
2391 | // ERROR | |
2392 | r = pakfire_jail_setup_pipe(jail, &ctx.pipes.log_ERROR, O_CLOEXEC); | |
2393 | if (r) | |
2394 | goto ERROR; | |
2395 | ||
2396 | #ifdef ENABLE_DEBUG | |
2397 | // DEBUG | |
2398 | r = pakfire_jail_setup_pipe(jail, &ctx.pipes.log_DEBUG, O_CLOEXEC); | |
2399 | if (r) | |
2400 | goto ERROR; | |
2401 | #endif /* ENABLE_DEBUG */ | |
2402 | ||
f949feac MT |
2403 | // Configure child process |
2404 | struct clone_args args = { | |
2405 | .flags = | |
2406 | CLONE_NEWCGROUP | | |
2407 | CLONE_NEWIPC | | |
2408 | CLONE_NEWNS | | |
2409 | CLONE_NEWPID | | |
2410 | CLONE_NEWTIME | | |
2411 | CLONE_NEWUSER | | |
2412 | CLONE_NEWUTS | | |
2413 | CLONE_PIDFD, | |
2414 | .exit_signal = SIGCHLD, | |
2415 | .pidfd = (long long unsigned int)&ctx.pidfd, | |
2416 | }; | |
2417 | ||
aca565fc | 2418 | // Launch the process in a cgroup that is a leaf of the configured cgroup |
02fd4f8b | 2419 | if (jail->cgroup) { |
f949feac MT |
2420 | args.flags |= CLONE_INTO_CGROUP; |
2421 | ||
ae5201c5 MT |
2422 | // Fetch our UUID |
2423 | const char* uuid = pakfire_jail_uuid(jail); | |
aca565fc MT |
2424 | |
2425 | // Create a temporary cgroup | |
ae5201c5 | 2426 | r = pakfire_cgroup_child(&ctx.cgroup, jail->cgroup, uuid, 0); |
aca565fc MT |
2427 | if (r) { |
2428 | ERROR(jail->pakfire, "Could not create cgroup for jail: %m\n"); | |
2429 | goto ERROR; | |
2430 | } | |
7bdf1d8e | 2431 | |
f949feac MT |
2432 | // Clone into this cgroup |
2433 | args.cgroup = pakfire_cgroup_fd(ctx.cgroup); | |
2434 | } | |
9b171c6a | 2435 | |
f949feac MT |
2436 | // Setup networking |
2437 | if (!pakfire_jail_exec_has_flag(&ctx, PAKFIRE_JAIL_HAS_NETWORKING)) { | |
2438 | args.flags |= CLONE_NEWNET; | |
2439 | } | |
9b171c6a | 2440 | |
f949feac MT |
2441 | // Fork this process |
2442 | ctx.pid = clone3(&args, sizeof(args)); | |
2443 | if (ctx.pid < 0) { | |
2444 | ERROR(jail->pakfire, "Could not clone: %m\n"); | |
2445 | return -1; | |
0bd84dc1 MT |
2446 | |
2447 | // Child process | |
f949feac MT |
2448 | } else if (ctx.pid == 0) { |
2449 | r = pakfire_jail_child(jail, &ctx, argv); | |
0bd84dc1 MT |
2450 | _exit(r); |
2451 | } | |
2452 | ||
679ee2fa | 2453 | // Parent process |
f949feac MT |
2454 | r = pakfire_jail_parent(jail, &ctx); |
2455 | if (r) | |
2456 | goto ERROR; | |
2457 | ||
2458 | DEBUG(jail->pakfire, "Waiting for PID %d to finish its work\n", ctx.pid); | |
2459 | ||
2460 | // Read output of the child process | |
d853213d MT |
2461 | r = pakfire_jail_wait(jail, &ctx); |
2462 | if (r) | |
2463 | goto ERROR; | |
0bd84dc1 | 2464 | |
f949feac MT |
2465 | // Handle exit status |
2466 | switch (ctx.status.si_code) { | |
2467 | case CLD_EXITED: | |
2468 | DEBUG(jail->pakfire, "The child process exited with code %d\n", | |
2469 | ctx.status.si_status); | |
2470 | ||
2471 | // Pass exit code | |
2472 | exit = ctx.status.si_status; | |
2473 | break; | |
2474 | ||
2475 | case CLD_KILLED: | |
2476 | ERROR(jail->pakfire, "The child process was killed\n"); | |
2477 | exit = 139; | |
2478 | break; | |
2479 | ||
2480 | case CLD_DUMPED: | |
2481 | ERROR(jail->pakfire, "The child process terminated abnormally\n"); | |
2482 | break; | |
2483 | ||
2484 | // Log anything else | |
2485 | default: | |
2486 | ERROR(jail->pakfire, "Unknown child exit code: %d\n", ctx.status.si_code); | |
2487 | break; | |
2488 | } | |
2489 | ||
679ee2fa | 2490 | ERROR: |
316c0488 MT |
2491 | // Reset all callbacks |
2492 | pakfire_jail_set_stdin_callback(jail, NULL, NULL); | |
2493 | pakfire_jail_set_stdout_callback(jail, NULL, NULL); | |
2494 | ||
aca565fc MT |
2495 | // Destroy the temporary cgroup (if any) |
2496 | if (ctx.cgroup) { | |
6b7cf275 | 2497 | // Read cgroup stats |
ec64b312 MT |
2498 | pakfire_cgroup_stat(ctx.cgroup, &ctx.cgroup_stats); |
2499 | pakfire_cgroup_stat_dump(ctx.cgroup, &ctx.cgroup_stats); | |
aca565fc MT |
2500 | pakfire_cgroup_destroy(ctx.cgroup); |
2501 | pakfire_cgroup_unref(ctx.cgroup); | |
2502 | } | |
2503 | ||
616f1fca | 2504 | // Close any file descriptors |
f949feac MT |
2505 | if (ctx.pidfd >= 0) |
2506 | close(ctx.pidfd); | |
c40722e3 MT |
2507 | if (ctx.pty.master.fd >= 0) |
2508 | close(ctx.pty.master.fd); | |
e33387d3 MT |
2509 | pakfire_jail_close_pipe(jail, ctx.pipes.log_INFO); |
2510 | pakfire_jail_close_pipe(jail, ctx.pipes.log_ERROR); | |
6ac51607 | 2511 | #ifdef ENABLE_DEBUG |
e33387d3 | 2512 | pakfire_jail_close_pipe(jail, ctx.pipes.log_DEBUG); |
6ac51607 | 2513 | #endif /* ENABLE_DEBUG */ |
8f49d254 | 2514 | pakfire_jail_close_pipe(jail, ctx.socket); |
616f1fca | 2515 | |
f949feac | 2516 | return exit; |
9f50bf71 | 2517 | } |
a45ed6b0 | 2518 | |
db4f234f | 2519 | static int pakfire_jail_exec_interactive( |
9fa1afb6 | 2520 | struct pakfire_jail* jail, const char* argv[], int flags) { |
db4f234f MT |
2521 | int r; |
2522 | ||
1190bb5f MT |
2523 | flags |= PAKFIRE_JAIL_PTY_FORWARDING; |
2524 | ||
db4f234f MT |
2525 | // Setup interactive stuff |
2526 | r = pakfire_jail_setup_interactive_env(jail); | |
2527 | if (r) | |
2528 | return r; | |
2529 | ||
9a3be06d | 2530 | return pakfire_jail_exec(jail, argv, flags); |
db4f234f MT |
2531 | } |
2532 | ||
ccdd2e95 MT |
2533 | int pakfire_jail_exec_script(struct pakfire_jail* jail, |
2534 | const char* script, | |
2535 | const size_t size, | |
04d3c185 | 2536 | const char* args[]) { |
a45ed6b0 MT |
2537 | char path[PATH_MAX]; |
2538 | const char** argv = NULL; | |
35291cb7 | 2539 | FILE* f = NULL; |
a45ed6b0 MT |
2540 | int r; |
2541 | ||
2542 | const char* root = pakfire_get_path(jail->pakfire); | |
2543 | ||
2544 | // Write the scriptlet to disk | |
819232d6 | 2545 | r = pakfire_path_append(path, root, PAKFIRE_TMP_DIR "/pakfire-script.XXXXXX"); |
56796f84 | 2546 | if (r) |
a45ed6b0 MT |
2547 | goto ERROR; |
2548 | ||
35291cb7 MT |
2549 | // Create a temporary file |
2550 | f = pakfire_mktemp(path, 0700); | |
2551 | if (!f) { | |
2552 | ERROR(jail->pakfire, "Could not create temporary file: %m\n"); | |
a45ed6b0 MT |
2553 | goto ERROR; |
2554 | } | |
2555 | ||
2556 | DEBUG(jail->pakfire, "Writing script to %s:\n%.*s\n", path, (int)size, script); | |
2557 | ||
2558 | // Write data | |
35291cb7 MT |
2559 | r = fprintf(f, "%s", script); |
2560 | if (r < 0) { | |
a45ed6b0 | 2561 | ERROR(jail->pakfire, "Could not write script to file %s: %m\n", path); |
a45ed6b0 MT |
2562 | goto ERROR; |
2563 | } | |
2564 | ||
2565 | // Close file | |
35291cb7 | 2566 | r = fclose(f); |
a45ed6b0 MT |
2567 | if (r) { |
2568 | ERROR(jail->pakfire, "Could not close script file %s: %m\n", path); | |
a45ed6b0 MT |
2569 | goto ERROR; |
2570 | } | |
2571 | ||
35291cb7 MT |
2572 | f = NULL; |
2573 | ||
a45ed6b0 MT |
2574 | // Count how many arguments were passed |
2575 | unsigned int argc = 1; | |
2576 | if (args) { | |
2577 | for (const char** arg = args; *arg; arg++) | |
2578 | argc++; | |
2579 | } | |
2580 | ||
2581 | argv = calloc(argc + 1, sizeof(*argv)); | |
2582 | if (!argv) { | |
2583 | ERROR(jail->pakfire, "Could not allocate argv: %m\n"); | |
2584 | goto ERROR; | |
2585 | } | |
2586 | ||
2587 | // Set command | |
2588 | argv[0] = (root) ? pakfire_path_relpath(root, path) : path; | |
2589 | ||
2590 | // Copy args | |
2591 | for (unsigned int i = 1; i < argc; i++) | |
2592 | argv[i] = args[i-1]; | |
2593 | ||
2594 | // Run the script | |
04d3c185 | 2595 | r = pakfire_jail_exec(jail, argv, 0); |
a45ed6b0 MT |
2596 | |
2597 | ERROR: | |
2598 | if (argv) | |
2599 | free(argv); | |
35291cb7 MT |
2600 | if (f) |
2601 | fclose(f); | |
a45ed6b0 MT |
2602 | |
2603 | // Remove script from disk | |
2604 | if (*path) | |
2605 | unlink(path); | |
2606 | ||
2607 | return r; | |
2608 | } | |
82df3c77 MT |
2609 | |
2610 | /* | |
2611 | A convenience function that creates a new jail, runs the given command and destroys | |
2612 | the jail again. | |
2613 | */ | |
12b9b39f | 2614 | int pakfire_jail_run(struct pakfire* pakfire, const char* argv[], int flags, char** output) { |
82df3c77 MT |
2615 | struct pakfire_jail* jail = NULL; |
2616 | int r; | |
2617 | ||
2618 | // Create a new jail | |
9fa1afb6 | 2619 | r = pakfire_jail_create(&jail, pakfire); |
82df3c77 MT |
2620 | if (r) |
2621 | goto ERROR; | |
2622 | ||
1a7eb888 MT |
2623 | // Set the callback that captures the output |
2624 | pakfire_jail_set_stdout_callback(jail, pakfire_jail_capture_stdout, output); | |
2625 | ||
82df3c77 | 2626 | // Execute the command |
04d3c185 | 2627 | r = pakfire_jail_exec(jail, argv, 0); |
82df3c77 MT |
2628 | |
2629 | ERROR: | |
2630 | if (jail) | |
2631 | pakfire_jail_unref(jail); | |
2632 | ||
2633 | return r; | |
2634 | } | |
4f688bd8 MT |
2635 | |
2636 | int pakfire_jail_run_script(struct pakfire* pakfire, | |
49a9babc | 2637 | const char* script, const size_t length, const char* argv[], int flags) { |
4f688bd8 MT |
2638 | struct pakfire_jail* jail = NULL; |
2639 | int r; | |
2640 | ||
2641 | // Create a new jail | |
9fa1afb6 | 2642 | r = pakfire_jail_create(&jail, pakfire); |
4f688bd8 MT |
2643 | if (r) |
2644 | goto ERROR; | |
2645 | ||
2646 | // Execute the command | |
04d3c185 | 2647 | r = pakfire_jail_exec_script(jail, script, length, argv); |
4f688bd8 MT |
2648 | |
2649 | ERROR: | |
2650 | if (jail) | |
2651 | pakfire_jail_unref(jail); | |
2652 | ||
2653 | return r; | |
2654 | } | |
e43489f7 | 2655 | |
5f6e42a2 | 2656 | int pakfire_jail_shell(struct pakfire_jail* jail) { |
42a41fdf MT |
2657 | int r; |
2658 | ||
e43489f7 MT |
2659 | const char* argv[] = { |
2660 | "/bin/bash", "--login", NULL, | |
2661 | }; | |
2662 | ||
2663 | // Execute /bin/bash | |
42a41fdf MT |
2664 | r = pakfire_jail_exec_interactive(jail, argv, 0); |
2665 | ||
2666 | // Raise any errors | |
2667 | if (r < 0) | |
2668 | return r; | |
2669 | ||
2670 | // Ignore any return codes from the shell | |
2671 | return 0; | |
e43489f7 MT |
2672 | } |
2673 | ||
f7ffbb93 | 2674 | static int pakfire_jail_run_if_possible(struct pakfire* pakfire, const char** argv) { |
e43489f7 | 2675 | char path[PATH_MAX]; |
f7ffbb93 | 2676 | int r; |
e43489f7 | 2677 | |
f7ffbb93 | 2678 | r = pakfire_path(pakfire, path, "%s", *argv); |
77e26129 MT |
2679 | if (r) |
2680 | return r; | |
e43489f7 | 2681 | |
f7ffbb93 | 2682 | // Check if the file is executable |
e43489f7 MT |
2683 | r = access(path, X_OK); |
2684 | if (r) { | |
f7ffbb93 | 2685 | DEBUG(pakfire, "%s is not executable. Skipping...\n", *argv); |
e43489f7 MT |
2686 | return 0; |
2687 | } | |
2688 | ||
f7ffbb93 MT |
2689 | return pakfire_jail_run(pakfire, argv, 0, NULL); |
2690 | } | |
2691 | ||
2692 | int pakfire_jail_ldconfig(struct pakfire* pakfire) { | |
e43489f7 | 2693 | const char* argv[] = { |
f7ffbb93 MT |
2694 | "/sbin/ldconfig", |
2695 | NULL, | |
e43489f7 MT |
2696 | }; |
2697 | ||
f7ffbb93 MT |
2698 | return pakfire_jail_run_if_possible(pakfire, argv); |
2699 | } | |
2700 | ||
2701 | int pakfire_jail_run_systemd_tmpfiles(struct pakfire* pakfire) { | |
2702 | const char* argv[] = { | |
2703 | "/usr/bin/systemd-tmpfiles", | |
2704 | "--create", | |
2705 | NULL, | |
2706 | }; | |
2707 | ||
2708 | return pakfire_jail_run_if_possible(pakfire, argv); | |
e43489f7 | 2709 | } |