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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> |
980b15af | 22 | #include <linux/capability.h> |
d853213d | 23 | #include <linux/fcntl.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> |
90d92b5c | 34 | #include <sys/personality.h> |
980b15af | 35 | #include <sys/prctl.h> |
cf440db8 | 36 | #include <sys/resource.h> |
0bd84dc1 MT |
37 | #include <sys/types.h> |
38 | #include <sys/wait.h> | |
32d5f21d | 39 | |
739d5b57 MT |
40 | // libseccomp |
41 | #include <seccomp.h> | |
42 | ||
ae5201c5 MT |
43 | // libuuid |
44 | #include <uuid.h> | |
45 | ||
90d92b5c | 46 | #include <pakfire/arch.h> |
e3ddb498 | 47 | #include <pakfire/cgroup.h> |
fd37ccaf | 48 | #include <pakfire/jail.h> |
4f59c39b MT |
49 | #include <pakfire/logging.h> |
50 | #include <pakfire/mount.h> | |
fd37ccaf | 51 | #include <pakfire/pakfire.h> |
6ce56f90 | 52 | #include <pakfire/private.h> |
4896e62c | 53 | #include <pakfire/pwd.h> |
d973a13d | 54 | #include <pakfire/string.h> |
32d5f21d MT |
55 | #include <pakfire/util.h> |
56 | ||
616f1fca MT |
57 | #define BUFFER_SIZE 1024 * 64 |
58 | #define ENVIRON_SIZE 128 | |
59 | #define EPOLL_MAX_EVENTS 2 | |
cc6e2264 | 60 | #define MAX_MOUNTPOINTS 8 |
fd37ccaf | 61 | |
d5bc8fe0 MT |
62 | // The default environment that will be set for every command |
63 | static const struct environ { | |
64 | const char* key; | |
65 | const char* val; | |
66 | } ENV[] = { | |
fbe95cdf | 67 | { "HOME", "/root" }, |
d5bc8fe0 | 68 | { "LANG", "en_US.utf-8" }, |
a7ad6d4f | 69 | { "PATH", "/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin", }, |
d5bc8fe0 MT |
70 | { "TERM", "vt100" }, |
71 | { NULL, NULL }, | |
72 | }; | |
73 | ||
cc6e2264 MT |
74 | struct pakfire_jail_mountpoint { |
75 | char source[PATH_MAX]; | |
76 | char target[PATH_MAX]; | |
77 | int flags; | |
78 | }; | |
79 | ||
fd37ccaf MT |
80 | struct pakfire_jail { |
81 | struct pakfire* pakfire; | |
82 | int nrefs; | |
32d5f21d | 83 | |
ae5201c5 MT |
84 | // A unique ID for each jail |
85 | uuid_t uuid; | |
86 | char __uuid[UUID_STR_LEN]; | |
87 | ||
d639929b MT |
88 | // Flags |
89 | int flags; | |
90 | ||
cf440db8 MT |
91 | // Resource Limits |
92 | int nice; | |
93 | ||
15503538 MT |
94 | // CGroup |
95 | struct pakfire_cgroup* cgroup; | |
96 | ||
32d5f21d MT |
97 | // Environment |
98 | char* env[ENVIRON_SIZE]; | |
616f1fca | 99 | |
cc6e2264 MT |
100 | // Mountpoints |
101 | struct pakfire_jail_mountpoint mountpoints[MAX_MOUNTPOINTS]; | |
102 | unsigned int num_mountpoints; | |
616f1fca MT |
103 | }; |
104 | ||
105 | struct pakfire_log_buffer { | |
106 | char data[BUFFER_SIZE]; | |
107 | size_t used; | |
108 | }; | |
109 | ||
110 | struct pakfire_jail_exec { | |
111 | // PID (of the child) | |
112 | pid_t pid; | |
d853213d | 113 | int pidfd; |
616f1fca | 114 | |
d853213d MT |
115 | // Process status (from waitid) |
116 | siginfo_t status; | |
616f1fca | 117 | |
f7d240a7 MT |
118 | // FD to notify the client that the parent has finished initialization |
119 | int completed_fd; | |
120 | ||
616f1fca | 121 | // Log pipes |
e33387d3 | 122 | struct pakfire_jail_pipes { |
2015cb92 | 123 | int stdin[2]; |
616f1fca MT |
124 | int stdout[2]; |
125 | int stderr[2]; | |
e33387d3 MT |
126 | |
127 | // Logging | |
128 | int log_INFO[2]; | |
129 | int log_ERROR[2]; | |
130 | int log_DEBUG[2]; | |
616f1fca MT |
131 | } pipes; |
132 | ||
2015cb92 MT |
133 | // Communicate |
134 | struct pakfire_jail_communicate { | |
135 | pakfire_jail_communicate_in in; | |
136 | pakfire_jail_communicate_out out; | |
137 | void* data; | |
138 | } communicate; | |
139 | ||
616f1fca | 140 | // Log buffers |
e33387d3 | 141 | struct pakfire_jail_buffers { |
616f1fca MT |
142 | struct pakfire_log_buffer stdout; |
143 | struct pakfire_log_buffer stderr; | |
e33387d3 MT |
144 | |
145 | // Logging | |
146 | struct pakfire_log_buffer log_INFO; | |
147 | struct pakfire_log_buffer log_ERROR; | |
148 | struct pakfire_log_buffer log_DEBUG; | |
616f1fca | 149 | } buffers; |
aca565fc MT |
150 | |
151 | struct pakfire_cgroup* cgroup; | |
6b7cf275 | 152 | struct pakfire_cgroup_stats cgroup_stats; |
fd37ccaf MT |
153 | }; |
154 | ||
0bd84dc1 MT |
155 | static int clone3(struct clone_args* args, size_t size) { |
156 | return syscall(__NR_clone3, args, size); | |
157 | } | |
158 | ||
d5bc8fe0 MT |
159 | static void pakfire_jail_free(struct pakfire_jail* jail) { |
160 | DEBUG(jail->pakfire, "Freeing jail at %p\n", jail); | |
161 | ||
162 | // Free environment | |
163 | for (unsigned int i = 0; jail->env[i]; i++) | |
164 | free(jail->env[i]); | |
165 | ||
d34b1e00 MT |
166 | if (jail->cgroup) |
167 | pakfire_cgroup_unref(jail->cgroup); | |
168 | ||
d5bc8fe0 MT |
169 | pakfire_unref(jail->pakfire); |
170 | free(jail); | |
171 | } | |
172 | ||
e33387d3 MT |
173 | /* |
174 | Passes any log messages on to the default pakfire log callback | |
175 | */ | |
fed41508 MT |
176 | static int pakfire_jail_default_log_callback(struct pakfire* pakfire, void* data, |
177 | int priority, const char* line, size_t length) { | |
178 | switch (priority) { | |
179 | case LOG_INFO: | |
180 | INFO(pakfire, "%s", line); | |
181 | break; | |
182 | ||
183 | case LOG_ERR: | |
184 | ERROR(pakfire, "%s", line); | |
185 | break; | |
e33387d3 MT |
186 | |
187 | #ifdef ENABLE_DEBUG | |
188 | case LOG_DEBUG: | |
189 | DEBUG(pakfire, "%s", line); | |
190 | break; | |
191 | #endif | |
fed41508 MT |
192 | } |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
00ba1d9a MT |
197 | static int pakfire_jail_setup_interactive_env(struct pakfire_jail* jail) { |
198 | // Set PS1 | |
199 | int r = pakfire_jail_set_env(jail, "PS1", "pakfire-jail \\w> "); | |
200 | if (r) | |
201 | return r; | |
202 | ||
203 | // Copy TERM | |
204 | char* TERM = secure_getenv("TERM"); | |
205 | if (TERM) { | |
206 | r = pakfire_jail_set_env(jail, "TERM", TERM); | |
207 | if (r) | |
208 | return r; | |
209 | } | |
210 | ||
211 | // Copy LANG | |
212 | char* LANG = secure_getenv("LANG"); | |
213 | if (LANG) { | |
214 | r = pakfire_jail_set_env(jail, "LANG", LANG); | |
215 | if (r) | |
216 | return r; | |
217 | } | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
6ce56f90 MT |
222 | PAKFIRE_EXPORT int pakfire_jail_create(struct pakfire_jail** jail, |
223 | struct pakfire* pakfire, int flags) { | |
d5bc8fe0 MT |
224 | int r; |
225 | ||
226 | // Allocate a new jail | |
fd37ccaf MT |
227 | struct pakfire_jail* j = calloc(1, sizeof(*j)); |
228 | if (!j) | |
229 | return 1; | |
230 | ||
231 | // Reference Pakfire | |
232 | j->pakfire = pakfire_ref(pakfire); | |
233 | ||
234 | // Initialize reference counter | |
235 | j->nrefs = 1; | |
236 | ||
d639929b MT |
237 | // Store flags |
238 | j->flags = flags; | |
239 | ||
ae5201c5 MT |
240 | // Generate a random UUID |
241 | uuid_generate_random(j->uuid); | |
242 | ||
84bd7655 MT |
243 | DEBUG(j->pakfire, "Allocated new jail at %p\n", j); |
244 | ||
d5bc8fe0 MT |
245 | // Set default environment |
246 | for (const struct environ* e = ENV; e->key; e++) { | |
247 | r = pakfire_jail_set_env(j, e->key, e->val); | |
248 | if (r) | |
249 | goto ERROR; | |
250 | } | |
251 | ||
fd37ccaf MT |
252 | // Done |
253 | *jail = j; | |
254 | return 0; | |
84bd7655 | 255 | |
d5bc8fe0 MT |
256 | ERROR: |
257 | pakfire_jail_free(j); | |
32d5f21d | 258 | |
d5bc8fe0 | 259 | return r; |
fd37ccaf MT |
260 | } |
261 | ||
6ce56f90 | 262 | PAKFIRE_EXPORT struct pakfire_jail* pakfire_jail_ref(struct pakfire_jail* jail) { |
fd37ccaf MT |
263 | ++jail->nrefs; |
264 | ||
265 | return jail; | |
266 | } | |
267 | ||
6ce56f90 | 268 | PAKFIRE_EXPORT struct pakfire_jail* pakfire_jail_unref(struct pakfire_jail* jail) { |
fd37ccaf MT |
269 | if (--jail->nrefs > 0) |
270 | return jail; | |
271 | ||
272 | pakfire_jail_free(jail); | |
273 | return NULL; | |
274 | } | |
32d5f21d | 275 | |
ae5201c5 | 276 | static const char* pakfire_jail_uuid(struct pakfire_jail* jail) { |
8b2cc8ae | 277 | if (!*jail->__uuid) |
ae5201c5 MT |
278 | uuid_unparse_lower(jail->uuid, jail->__uuid); |
279 | ||
280 | return jail->__uuid; | |
281 | } | |
282 | ||
cf440db8 MT |
283 | // Resource Limits |
284 | ||
285 | PAKFIRE_EXPORT int pakfire_jail_nice(struct pakfire_jail* jail, int nice) { | |
286 | // Check if nice level is in range | |
287 | if (nice < -19 || nice > 20) { | |
288 | errno = EINVAL; | |
289 | return 1; | |
290 | } | |
291 | ||
292 | // Store nice level | |
293 | jail->nice = nice; | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
15503538 MT |
298 | int pakfire_jail_set_cgroup(struct pakfire_jail* jail, struct pakfire_cgroup* cgroup) { |
299 | // Free any previous cgroup | |
300 | if (jail->cgroup) { | |
301 | pakfire_cgroup_unref(jail->cgroup); | |
302 | jail->cgroup = NULL; | |
303 | } | |
304 | ||
305 | // Set any new cgroup | |
306 | if (cgroup) { | |
307 | DEBUG(jail->pakfire, "Setting cgroup %p\n", cgroup); | |
308 | ||
309 | jail->cgroup = pakfire_cgroup_ref(cgroup); | |
310 | } | |
311 | ||
312 | // Done | |
313 | return 0; | |
314 | } | |
315 | ||
32d5f21d MT |
316 | // Environment |
317 | ||
318 | // Returns the length of the environment | |
319 | static unsigned int pakfire_jail_env_length(struct pakfire_jail* jail) { | |
320 | unsigned int i = 0; | |
321 | ||
322 | // Count everything in the environment | |
323 | for (char** e = jail->env; *e; e++) | |
324 | i++; | |
325 | ||
326 | return i; | |
327 | } | |
328 | ||
329 | // Finds an existing environment variable and returns its index or -1 if not found | |
330 | static int pakfire_jail_find_env(struct pakfire_jail* jail, const char* key) { | |
331 | if (!key) { | |
332 | errno = EINVAL; | |
333 | return -1; | |
334 | } | |
335 | ||
336 | char buffer[strlen(key) + 2]; | |
337 | pakfire_string_format(buffer, "%s=", key); | |
338 | ||
339 | for (unsigned int i = 0; jail->env[i]; i++) { | |
340 | if (pakfire_string_startswith(jail->env[i], buffer)) | |
341 | return i; | |
342 | } | |
343 | ||
344 | // Nothing found | |
345 | return -1; | |
346 | } | |
347 | ||
348 | // Returns the value of an environment variable or NULL | |
6ce56f90 MT |
349 | PAKFIRE_EXPORT const char* pakfire_jail_get_env(struct pakfire_jail* jail, |
350 | const char* key) { | |
32d5f21d MT |
351 | int i = pakfire_jail_find_env(jail, key); |
352 | if (i < 0) | |
353 | return NULL; | |
354 | ||
355 | return jail->env[i] + strlen(key) + 1; | |
356 | } | |
357 | ||
358 | // Sets an environment variable | |
6ce56f90 MT |
359 | PAKFIRE_EXPORT int pakfire_jail_set_env(struct pakfire_jail* jail, |
360 | const char* key, const char* value) { | |
32d5f21d MT |
361 | // Find the index where to write this value to |
362 | int i = pakfire_jail_find_env(jail, key); | |
363 | if (i < 0) | |
364 | i = pakfire_jail_env_length(jail); | |
365 | ||
366 | // Return -ENOSPC when the environment is full | |
367 | if (i >= ENVIRON_SIZE) { | |
368 | errno = ENOSPC; | |
369 | return -1; | |
370 | } | |
371 | ||
372 | // Free any previous value | |
373 | if (jail->env[i]) | |
374 | free(jail->env[i]); | |
375 | ||
376 | // Format and set environment variable | |
377 | asprintf(&jail->env[i], "%s=%s", key, value); | |
378 | ||
379 | DEBUG(jail->pakfire, "Set environment variable: %s\n", jail->env[i]); | |
380 | ||
381 | return 0; | |
382 | } | |
9f50bf71 | 383 | |
939025e7 | 384 | // Imports an environment |
6ce56f90 | 385 | PAKFIRE_EXPORT int pakfire_jail_import_env(struct pakfire_jail* jail, const char* env[]) { |
939025e7 MT |
386 | if (!env) |
387 | return 0; | |
388 | ||
389 | char* key; | |
390 | char* val; | |
391 | int r; | |
392 | ||
393 | // Copy environment variables | |
394 | for (unsigned int i = 0; env[i]; i++) { | |
395 | r = pakfire_string_partition(env[i], "=", &key, &val); | |
396 | if (r) | |
397 | continue; | |
398 | ||
399 | // Set value | |
400 | r = pakfire_jail_set_env(jail, key, val); | |
401 | ||
402 | if (key) | |
403 | free(key); | |
404 | if (val) | |
405 | free(val); | |
406 | ||
407 | // Break on error | |
408 | if (r) | |
409 | return r; | |
410 | } | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
e33387d3 MT |
415 | /* |
416 | This function replaces any logging in the child process. | |
417 | ||
418 | All log messages will be sent to the parent process through their respective pipes. | |
419 | */ | |
420 | static void pakfire_jail_log(void* data, int priority, const char* file, | |
421 | int line, const char* fn, const char* format, va_list args) { | |
422 | struct pakfire_jail_pipes* pipes = (struct pakfire_jail_pipes*)data; | |
423 | int fd; | |
424 | ||
425 | switch (priority) { | |
426 | case LOG_INFO: | |
427 | fd = pipes->log_INFO[1]; | |
428 | break; | |
429 | ||
430 | case LOG_ERR: | |
431 | fd = pipes->log_ERROR[1]; | |
432 | break; | |
433 | ||
434 | #ifdef ENABLE_DEBUG | |
435 | case LOG_DEBUG: | |
436 | fd = pipes->log_DEBUG[1]; | |
437 | break; | |
438 | #endif /* ENABLE_DEBUG */ | |
439 | ||
440 | // Ignore any messages of an unknown priority | |
441 | default: | |
442 | return; | |
443 | } | |
444 | ||
445 | // Send the log message | |
446 | if (fd) | |
447 | vdprintf(fd, format, args); | |
448 | } | |
449 | ||
616f1fca MT |
450 | static int pakfire_jail_log_buffer_is_full(const struct pakfire_log_buffer* buffer) { |
451 | return (sizeof(buffer->data) == buffer->used); | |
452 | } | |
453 | ||
454 | /* | |
455 | This function reads as much data as it can from the file descriptor. | |
456 | If it finds a whole line in it, it will send it to the logger and repeat the process. | |
457 | If not newline character is found, it will try to read more data until it finds one. | |
458 | */ | |
459 | static int pakfire_jail_handle_log(struct pakfire_jail* jail, | |
e33387d3 | 460 | struct pakfire_jail_exec* ctx, int priority, int fd, |
2015cb92 | 461 | struct pakfire_log_buffer* buffer, pakfire_jail_communicate_out callback, void* data) { |
616f1fca MT |
462 | char line[BUFFER_SIZE + 1]; |
463 | ||
464 | // Fill up buffer from fd | |
465 | if (buffer->used < sizeof(buffer->data)) { | |
466 | ssize_t bytes_read = read(fd, buffer->data + buffer->used, | |
467 | sizeof(buffer->data) - buffer->used); | |
468 | ||
469 | // Handle errors | |
470 | if (bytes_read < 0) { | |
471 | ERROR(jail->pakfire, "Could not read from fd %d: %m\n", fd); | |
472 | return -1; | |
473 | } | |
474 | ||
475 | // Update buffer size | |
476 | buffer->used += bytes_read; | |
477 | } | |
478 | ||
479 | // See if we have any lines that we can write | |
480 | while (buffer->used) { | |
481 | // Search for the end of the first line | |
482 | char* eol = memchr(buffer->data, '\n', buffer->used); | |
483 | ||
484 | // No newline found | |
485 | if (!eol) { | |
486 | // If the buffer is full, we send the content to the logger and try again | |
487 | // This should not happen in practise | |
488 | if (pakfire_jail_log_buffer_is_full(buffer)) { | |
489 | DEBUG(jail->pakfire, "Logging buffer is full. Sending all content\n"); | |
490 | ||
491 | eol = buffer->data + sizeof(buffer->data) - 1; | |
492 | ||
493 | // Otherwise we might have only read parts of the output | |
494 | } else | |
495 | break; | |
496 | } | |
497 | ||
498 | // Find the length of the string | |
499 | size_t length = eol - buffer->data + 1; | |
500 | ||
501 | // Copy the line into the buffer | |
502 | memcpy(line, buffer->data, length); | |
503 | ||
504 | // Terminate the string | |
505 | line[length] = '\0'; | |
506 | ||
507 | // Log the line | |
e33387d3 MT |
508 | if (callback) { |
509 | int r = callback(jail->pakfire, data, priority, line, length); | |
616f1fca MT |
510 | if (r) { |
511 | ERROR(jail->pakfire, "The logging callback returned an error: %d\n", r); | |
512 | return r; | |
513 | } | |
514 | } | |
515 | ||
516 | // Remove line from buffer | |
517 | memmove(buffer->data, buffer->data + length, buffer->used - length); | |
518 | buffer->used -= length; | |
519 | } | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
195fe455 MT |
524 | static int pakfire_jail_setup_pipe(struct pakfire_jail* jail, int (*fds)[2], const int flags) { |
525 | int r = pipe2(*fds, flags); | |
526 | if (r < 0) { | |
527 | ERROR(jail->pakfire, "Could not setup pipe: %m\n"); | |
528 | return 1; | |
529 | } | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
534 | static void pakfire_jail_close_pipe(struct pakfire_jail* jail, int fds[2]) { | |
535 | for (unsigned int i = 0; i < 2; i++) | |
536 | if (fds[i]) | |
537 | close(fds[i]); | |
538 | } | |
539 | ||
e33387d3 MT |
540 | /* |
541 | This is a convenience function to fetch the reading end of a pipe and | |
542 | closes the write end. | |
543 | */ | |
544 | static int pakfire_jail_get_pipe(struct pakfire_jail* jail, int (*fds)[2]) { | |
545 | // Give the variables easier names to avoid confusion | |
546 | int* fd_read = &(*fds)[0]; | |
547 | int* fd_write = &(*fds)[1]; | |
548 | ||
549 | // Close the write end of the pipe | |
550 | if (*fd_write) { | |
551 | close(*fd_write); | |
552 | *fd_write = 0; | |
553 | } | |
554 | ||
555 | // Return the read end | |
556 | return *fd_read; | |
557 | } | |
558 | ||
d853213d | 559 | static int pakfire_jail_wait(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx) { |
616f1fca MT |
560 | int epollfd = -1; |
561 | struct epoll_event ev; | |
562 | struct epoll_event events[EPOLL_MAX_EVENTS]; | |
563 | int r = 0; | |
564 | ||
565 | // Fetch file descriptors from context | |
e33387d3 MT |
566 | const int stdout = pakfire_jail_get_pipe(jail, &ctx->pipes.stdout); |
567 | const int stderr = pakfire_jail_get_pipe(jail, &ctx->pipes.stderr); | |
d853213d | 568 | const int pidfd = ctx->pidfd; |
616f1fca | 569 | |
e33387d3 MT |
570 | // Logging |
571 | const int log_INFO = pakfire_jail_get_pipe(jail, &ctx->pipes.log_INFO); | |
572 | const int log_ERROR = pakfire_jail_get_pipe(jail, &ctx->pipes.log_ERROR); | |
573 | const int log_DEBUG = pakfire_jail_get_pipe(jail, &ctx->pipes.log_DEBUG); | |
7ebfb7cb MT |
574 | |
575 | // Make a list of all file descriptors we are interested in | |
d853213d | 576 | int fds[] = { |
e33387d3 | 577 | stdout, stderr, pidfd, log_INFO, log_ERROR, log_DEBUG, |
616f1fca MT |
578 | }; |
579 | ||
580 | // Setup epoll | |
581 | epollfd = epoll_create1(0); | |
582 | if (epollfd < 0) { | |
583 | ERROR(jail->pakfire, "Could not initialize epoll(): %m\n"); | |
584 | r = 1; | |
d853213d | 585 | goto ERROR; |
616f1fca MT |
586 | } |
587 | ||
e068b964 | 588 | ev.events = EPOLLIN|EPOLLHUP; |
616f1fca MT |
589 | |
590 | // Turn file descriptors into non-blocking mode and add them to epoll() | |
3aad8c0d | 591 | for (unsigned int i = 0; i < sizeof(fds) / sizeof(*fds); i++) { |
616f1fca MT |
592 | int fd = fds[i]; |
593 | ||
d853213d MT |
594 | // Skip fds which were not initialized |
595 | if (fd <= 0) | |
596 | continue; | |
597 | ||
616f1fca MT |
598 | ev.data.fd = fd; |
599 | ||
600 | if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev) < 0) { | |
601 | ERROR(jail->pakfire, "Could not add file descriptor %d to epoll(): %m\n", fd); | |
602 | r = 1; | |
d853213d | 603 | goto ERROR; |
616f1fca MT |
604 | } |
605 | } | |
606 | ||
607 | int ended = 0; | |
608 | ||
609 | // Loop for as long as the process is alive | |
610 | while (!ended) { | |
616f1fca MT |
611 | int num = epoll_wait(epollfd, events, EPOLL_MAX_EVENTS, -1); |
612 | if (num < 1) { | |
613 | // Ignore if epoll_wait() has been interrupted | |
614 | if (errno == EINTR) | |
615 | continue; | |
616 | ||
617 | ERROR(jail->pakfire, "epoll_wait() failed: %m\n"); | |
618 | r = 1; | |
619 | ||
d853213d | 620 | goto ERROR; |
616f1fca MT |
621 | } |
622 | ||
616f1fca | 623 | for (int i = 0; i < num; i++) { |
e068b964 | 624 | int e = events[i].events; |
616f1fca MT |
625 | int fd = events[i].data.fd; |
626 | ||
e33387d3 | 627 | struct pakfire_log_buffer* buffer = NULL; |
2015cb92 | 628 | pakfire_jail_communicate_out callback = NULL; |
e33387d3 MT |
629 | void* data = NULL; |
630 | int priority; | |
631 | ||
e068b964 MT |
632 | // Check if there is any data to be read |
633 | if (e & EPOLLIN) { | |
634 | // Handle any changes to the PIDFD | |
635 | if (fd == pidfd) { | |
636 | // Call waidid() and store the result | |
637 | r = waitid(P_PIDFD, ctx->pidfd, &ctx->status, WEXITED); | |
638 | if (r) { | |
639 | ERROR(jail->pakfire, "waitid() failed: %m\n"); | |
640 | goto ERROR; | |
641 | } | |
d853213d | 642 | |
e068b964 MT |
643 | // Mark that we have ended so that we will process the remaining |
644 | // events from epoll() now, but won't restart the outer loop. | |
645 | ended = 1; | |
646 | continue; | |
d853213d | 647 | |
e068b964 MT |
648 | // Handle logging messages |
649 | } else if (fd == log_INFO) { | |
650 | buffer = &ctx->buffers.log_INFO; | |
651 | priority = LOG_INFO; | |
e33387d3 | 652 | |
e068b964 | 653 | callback = pakfire_jail_default_log_callback; |
e33387d3 | 654 | |
e068b964 MT |
655 | } else if (fd == log_ERROR) { |
656 | buffer = &ctx->buffers.log_ERROR; | |
657 | priority = LOG_ERR; | |
e33387d3 | 658 | |
e068b964 | 659 | callback = pakfire_jail_default_log_callback; |
e33387d3 | 660 | |
e068b964 MT |
661 | } else if (fd == log_DEBUG) { |
662 | buffer = &ctx->buffers.log_DEBUG; | |
663 | priority = LOG_DEBUG; | |
e33387d3 | 664 | |
e068b964 | 665 | callback = pakfire_jail_default_log_callback; |
e33387d3 | 666 | |
e068b964 MT |
667 | // Handle anything from the log pipes |
668 | } else if (fd == stdout) { | |
669 | buffer = &ctx->buffers.stdout; | |
670 | priority = LOG_INFO; | |
616f1fca | 671 | |
2015cb92 MT |
672 | callback = ctx->communicate.out; |
673 | data = ctx->communicate.data; | |
e33387d3 | 674 | |
e068b964 MT |
675 | } else if (fd == stderr) { |
676 | buffer = &ctx->buffers.stderr; | |
677 | priority = LOG_ERR; | |
616f1fca | 678 | |
2015cb92 MT |
679 | callback = ctx->communicate.out; |
680 | data = ctx->communicate.data; | |
e33387d3 | 681 | |
e068b964 MT |
682 | } else { |
683 | DEBUG(jail->pakfire, "Received invalid file descriptor %d\n", fd); | |
684 | continue; | |
685 | } | |
686 | ||
687 | // Handle log event | |
688 | r = pakfire_jail_handle_log(jail, ctx, priority, fd, buffer, callback, data); | |
689 | if (r) | |
690 | goto ERROR; | |
616f1fca MT |
691 | } |
692 | ||
e068b964 MT |
693 | // Check if any file descriptors have been closed |
694 | if (e & EPOLLHUP) { | |
695 | // Remove the file descriptor | |
696 | r = epoll_ctl(epollfd, EPOLL_CTL_DEL, fd, NULL); | |
697 | if (r) { | |
698 | ERROR(jail->pakfire, "Could not remove closed file-descriptor %d: %m\n", fd); | |
699 | goto ERROR; | |
700 | } | |
701 | } | |
616f1fca MT |
702 | } |
703 | } | |
704 | ||
d853213d | 705 | ERROR: |
616f1fca MT |
706 | if (epollfd > 0) |
707 | close(epollfd); | |
708 | ||
709 | return r; | |
710 | } | |
711 | ||
ccdd2e95 MT |
712 | int pakfire_jail_capture_stdout(struct pakfire* pakfire, void* data, |
713 | int priority, const char* line, size_t length) { | |
12b9b39f MT |
714 | char** output = (char**)data; |
715 | int r; | |
0de6bb30 | 716 | |
2015cb92 MT |
717 | // Append everything from stdout to a buffer |
718 | if (output && priority == LOG_INFO) { | |
12b9b39f MT |
719 | r = asprintf(output, "%s%s", (output && *output) ? *output : "", line); |
720 | if (r < 0) | |
0de6bb30 | 721 | return 1; |
0de6bb30 MT |
722 | return 0; |
723 | } | |
724 | ||
725 | // Send everything else to the default logger | |
726 | return pakfire_jail_default_log_callback(pakfire, NULL, priority, line, length); | |
727 | } | |
728 | ||
980b15af MT |
729 | // Capabilities |
730 | ||
731 | static int pakfire_jail_drop_capabilities(struct pakfire_jail* jail) { | |
732 | const int capabilities[] = { | |
733 | // Deny access to the kernel's audit system | |
734 | CAP_AUDIT_CONTROL, | |
735 | CAP_AUDIT_READ, | |
736 | CAP_AUDIT_WRITE, | |
737 | ||
738 | // Deny suspending block devices | |
739 | CAP_BLOCK_SUSPEND, | |
740 | ||
741 | // Deny any stuff with BPF | |
742 | CAP_BPF, | |
743 | ||
744 | // Deny checkpoint restore | |
745 | CAP_CHECKPOINT_RESTORE, | |
746 | ||
747 | // Deny opening files by inode number (open_by_handle_at) | |
748 | CAP_DAC_READ_SEARCH, | |
749 | ||
750 | // Deny setting SUID bits | |
751 | CAP_FSETID, | |
752 | ||
753 | // Deny locking more memory | |
754 | CAP_IPC_LOCK, | |
755 | ||
756 | // Deny modifying any Apparmor/SELinux/SMACK configuration | |
757 | CAP_MAC_ADMIN, | |
758 | CAP_MAC_OVERRIDE, | |
759 | ||
760 | // Deny creating any special devices | |
761 | CAP_MKNOD, | |
762 | ||
763 | // Deny setting any capabilities | |
764 | CAP_SETFCAP, | |
765 | ||
766 | // Deny reading from syslog | |
767 | CAP_SYSLOG, | |
768 | ||
769 | // Deny any admin actions (mount, sethostname, ...) | |
770 | CAP_SYS_ADMIN, | |
771 | ||
772 | // Deny rebooting the system | |
773 | CAP_SYS_BOOT, | |
774 | ||
775 | // Deny loading kernel modules | |
776 | CAP_SYS_MODULE, | |
777 | ||
778 | // Deny setting nice level | |
779 | CAP_SYS_NICE, | |
780 | ||
781 | // Deny access to /proc/kcore, /dev/mem, /dev/kmem | |
782 | CAP_SYS_RAWIO, | |
783 | ||
784 | // Deny circumventing any resource limits | |
785 | CAP_SYS_RESOURCE, | |
786 | ||
787 | // Deny setting the system time | |
788 | CAP_SYS_TIME, | |
789 | ||
790 | // Deny playing with suspend | |
791 | CAP_WAKE_ALARM, | |
792 | ||
793 | 0, | |
794 | }; | |
795 | ||
796 | DEBUG(jail->pakfire, "Dropping capabilities...\n"); | |
797 | ||
798 | size_t num_caps = 0; | |
799 | int r; | |
800 | ||
801 | // Drop any capabilities | |
802 | for (const int* cap = capabilities; *cap; cap++) { | |
803 | r = prctl(PR_CAPBSET_DROP, *cap, 0, 0, 0); | |
804 | if (r) { | |
805 | ERROR(jail->pakfire, "Could not drop capability %d: %m\n", *cap); | |
806 | return r; | |
807 | } | |
808 | ||
809 | num_caps++; | |
810 | } | |
811 | ||
812 | // Fetch any capabilities | |
813 | cap_t caps = cap_get_proc(); | |
814 | if (!caps) { | |
815 | ERROR(jail->pakfire, "Could not read capabilities: %m\n"); | |
816 | return 1; | |
817 | } | |
818 | ||
819 | /* | |
820 | Set inheritable capabilities | |
821 | ||
822 | This ensures that no processes will be able to gain any of the listed | |
823 | capabilities again. | |
824 | */ | |
825 | r = cap_set_flag(caps, CAP_INHERITABLE, num_caps, capabilities, CAP_CLEAR); | |
826 | if (r) { | |
827 | ERROR(jail->pakfire, "cap_set_flag() failed: %m\n"); | |
828 | goto ERROR; | |
829 | } | |
830 | ||
831 | // Restore capabilities | |
832 | r = cap_set_proc(caps); | |
833 | if (r) { | |
834 | ERROR(jail->pakfire, "Could not restore capabilities: %m\n"); | |
835 | goto ERROR; | |
836 | } | |
837 | ||
838 | ERROR: | |
839 | if (caps) | |
840 | cap_free(caps); | |
841 | ||
842 | return r; | |
843 | } | |
844 | ||
739d5b57 MT |
845 | // Syscall Filter |
846 | ||
847 | static int pakfire_jail_limit_syscalls(struct pakfire_jail* jail) { | |
848 | const int syscalls[] = { | |
849 | // The kernel's keyring isn't namespaced | |
850 | SCMP_SYS(keyctl), | |
851 | SCMP_SYS(add_key), | |
852 | SCMP_SYS(request_key), | |
853 | ||
854 | // Disable userfaultfd | |
855 | SCMP_SYS(userfaultfd), | |
856 | ||
857 | // Disable perf which could leak a lot of information about the host | |
858 | SCMP_SYS(perf_event_open), | |
859 | ||
860 | 0, | |
861 | }; | |
862 | int r = 1; | |
863 | ||
864 | DEBUG(jail->pakfire, "Applying syscall filter...\n"); | |
865 | ||
866 | // Setup a syscall filter which allows everything by default | |
867 | scmp_filter_ctx ctx = seccomp_init(SCMP_ACT_ALLOW); | |
868 | if (!ctx) { | |
869 | ERROR(jail->pakfire, "Could not setup seccomp filter: %m\n"); | |
870 | goto ERROR; | |
871 | } | |
872 | ||
873 | // All all syscalls | |
874 | for (const int* syscall = syscalls; *syscall; syscall++) { | |
875 | r = seccomp_rule_add(ctx, SCMP_ACT_ERRNO(EPERM), *syscall, 0); | |
876 | if (r) { | |
877 | ERROR(jail->pakfire, "Could not configure syscall %d: %m\n", *syscall); | |
878 | goto ERROR; | |
879 | } | |
880 | } | |
881 | ||
882 | // Load syscall filter into the kernel | |
883 | r = seccomp_load(ctx); | |
884 | if (r) { | |
885 | ERROR(jail->pakfire, "Could not load syscall filter into the kernel: %m\n"); | |
886 | goto ERROR; | |
887 | } | |
888 | ||
889 | ERROR: | |
890 | if (ctx) | |
891 | seccomp_release(ctx); | |
892 | ||
893 | return r; | |
894 | } | |
895 | ||
cc6e2264 MT |
896 | // Mountpoints |
897 | ||
061223f7 | 898 | PAKFIRE_EXPORT int pakfire_jail_bind(struct pakfire_jail* jail, |
cc6e2264 MT |
899 | const char* source, const char* target, int flags) { |
900 | struct pakfire_jail_mountpoint* mp = NULL; | |
901 | int r; | |
902 | ||
903 | // Check if there is any space left | |
904 | if (jail->num_mountpoints >= MAX_MOUNTPOINTS) { | |
905 | errno = ENOSPC; | |
906 | return 1; | |
907 | } | |
908 | ||
909 | // Check for valid inputs | |
910 | if (!source || !target) { | |
911 | errno = EINVAL; | |
912 | return 1; | |
913 | } | |
914 | ||
915 | // Select the next free slot | |
916 | mp = &jail->mountpoints[jail->num_mountpoints]; | |
917 | ||
918 | // Copy source | |
919 | r = pakfire_string_set(mp->source, source); | |
a60955af | 920 | if (r) { |
cc6e2264 | 921 | ERROR(jail->pakfire, "Could not copy source: %m\n"); |
a60955af | 922 | return r; |
cc6e2264 MT |
923 | } |
924 | ||
925 | // Copy target | |
926 | r = pakfire_string_set(mp->target, target); | |
a60955af | 927 | if (r) { |
cc6e2264 | 928 | ERROR(jail->pakfire, "Could not copy target: %m\n"); |
a60955af | 929 | return r; |
cc6e2264 MT |
930 | } |
931 | ||
932 | // Copy flags | |
933 | mp->flags = flags; | |
934 | ||
935 | // Increment counter | |
936 | jail->num_mountpoints++; | |
937 | ||
938 | return 0; | |
939 | } | |
940 | ||
941 | /* | |
942 | Mounts everything that we require in the new namespace | |
943 | */ | |
944 | static int pakfire_jail_mount(struct pakfire_jail* jail) { | |
945 | struct pakfire_jail_mountpoint* mp = NULL; | |
946 | int r; | |
947 | ||
948 | // Mount all default stuff | |
949 | r = pakfire_mount_all(jail->pakfire); | |
950 | if (r) | |
951 | return r; | |
952 | ||
953 | // Mount all custom stuff | |
954 | for (unsigned int i = 0; i < jail->num_mountpoints; i++) { | |
955 | // Fetch mountpoint | |
956 | mp = &jail->mountpoints[i]; | |
957 | ||
958 | // Mount it | |
959 | r = pakfire_bind(jail->pakfire, mp->source, mp->target, mp->flags); | |
960 | if (r) | |
961 | return r; | |
962 | } | |
963 | ||
964 | // Log all mountpoints | |
965 | pakfire_mount_list(jail->pakfire); | |
966 | ||
967 | return 0; | |
968 | } | |
969 | ||
679ee2fa MT |
970 | // UID/GID Mapping |
971 | ||
679ee2fa MT |
972 | static int pakfire_jail_setup_uid_mapping(struct pakfire_jail* jail, pid_t pid) { |
973 | char path[PATH_MAX]; | |
974 | int r; | |
975 | ||
4896e62c MT |
976 | // Skip mapping anything when running on / |
977 | if (pakfire_on_root(jail->pakfire)) | |
978 | return 0; | |
0f7f068b | 979 | |
abe4ee37 MT |
980 | // Make path |
981 | r = pakfire_string_format(path, "/proc/%d/uid_map", pid); | |
982 | if (r) | |
983 | return r; | |
984 | ||
985 | // Fetch UID | |
986 | const uid_t uid = pakfire_uid(jail->pakfire); | |
987 | ||
4896e62c | 988 | // Fetch SUBUID |
a1ff2863 | 989 | const struct pakfire_subid* subuid = pakfire_subuid(jail->pakfire); |
4896e62c MT |
990 | if (!subuid) |
991 | return 1; | |
679ee2fa | 992 | |
abe4ee37 | 993 | /* When running as root, we will map the entire range. |
679ee2fa | 994 | |
abe4ee37 MT |
995 | When running as a non-privileged user, we will map the root user inside the jail |
996 | to the user's UID outside of the jail, and we will map the rest starting from one. | |
997 | */ | |
679ee2fa | 998 | |
abe4ee37 MT |
999 | // Running as root |
1000 | if (uid == 0) { | |
1001 | r = pakfire_file_write(jail->pakfire, path, 0, 0, 0, | |
1002 | "0 %lu %lu\n", subuid->id, subuid->length); | |
1003 | } else { | |
1004 | r = pakfire_file_write(jail->pakfire, path, 0, 0, 0, | |
b64888fa | 1005 | "0 %lu 1\n1 %lu %lu\n", uid, subuid->id, subuid->length); |
abe4ee37 MT |
1006 | } |
1007 | ||
1008 | if (r) { | |
1009 | ERROR(jail->pakfire, "Could not map UIDs: %m\n"); | |
1010 | return r; | |
1011 | } | |
1012 | ||
1013 | return r; | |
679ee2fa MT |
1014 | } |
1015 | ||
1016 | static int pakfire_jail_setup_gid_mapping(struct pakfire_jail* jail, pid_t pid) { | |
1017 | char path[PATH_MAX]; | |
1018 | int r; | |
1019 | ||
4896e62c MT |
1020 | // Skip mapping anything when running on / |
1021 | if (pakfire_on_root(jail->pakfire)) | |
1022 | return 0; | |
0f7f068b | 1023 | |
abe4ee37 MT |
1024 | // Fetch GID |
1025 | const gid_t gid = pakfire_gid(jail->pakfire); | |
1026 | ||
4896e62c | 1027 | // Fetch SUBGID |
a1ff2863 | 1028 | const struct pakfire_subid* subgid = pakfire_subgid(jail->pakfire); |
4896e62c MT |
1029 | if (!subgid) |
1030 | return 1; | |
679ee2fa MT |
1031 | |
1032 | // Make path | |
1033 | r = pakfire_string_format(path, "/proc/%d/gid_map", pid); | |
a60955af MT |
1034 | if (r) |
1035 | return r; | |
679ee2fa | 1036 | |
abe4ee37 MT |
1037 | // Running as root |
1038 | if (gid == 0) { | |
1039 | r = pakfire_file_write(jail->pakfire, path, 0, 0, 0, | |
1040 | "0 %lu %lu\n", subgid->id, subgid->length); | |
1041 | } else { | |
1042 | r = pakfire_file_write(jail->pakfire, path, 0, 0, 0, | |
1043 | "0 %lu 1\n%1 %lu %lu\n", gid, subgid->id, subgid->length); | |
1044 | } | |
679ee2fa | 1045 | |
abe4ee37 MT |
1046 | if (r) { |
1047 | ERROR(jail->pakfire, "Could not map GIDs: %m\n"); | |
1048 | return r; | |
1049 | } | |
1050 | ||
1051 | return r; | |
679ee2fa MT |
1052 | } |
1053 | ||
78d7488a MT |
1054 | static int pakfire_jail_setgroups(struct pakfire_jail* jail, pid_t pid) { |
1055 | char path[PATH_MAX]; | |
1056 | int r = 1; | |
1057 | ||
1058 | // Make path | |
1059 | r = pakfire_string_format(path, "/proc/%d/setgroups", pid); | |
a60955af MT |
1060 | if (r) |
1061 | return r; | |
78d7488a MT |
1062 | |
1063 | // Open file for writing | |
1064 | FILE* f = fopen(path, "w"); | |
1065 | if (!f) { | |
1066 | ERROR(jail->pakfire, "Could not open %s for writing: %m\n", path); | |
1067 | goto ERROR; | |
1068 | } | |
1069 | ||
1070 | // Write content | |
1071 | int bytes_written = fprintf(f, "deny\n"); | |
1072 | if (bytes_written <= 0) { | |
1073 | ERROR(jail->pakfire, "Could not write to %s: %m\n", path); | |
1074 | goto ERROR; | |
1075 | } | |
1076 | ||
1077 | r = fclose(f); | |
1078 | f = NULL; | |
1079 | if (r) { | |
1080 | ERROR(jail->pakfire, "Could not close %s: %m\n", path); | |
1081 | goto ERROR; | |
1082 | } | |
1083 | ||
1084 | ERROR: | |
1085 | if (f) | |
1086 | fclose(f); | |
1087 | ||
1088 | return r; | |
1089 | } | |
1090 | ||
43dc0e16 | 1091 | static int pakfire_jail_send_signal(struct pakfire_jail* jail, int fd) { |
743f449e MT |
1092 | const uint64_t val = 1; |
1093 | int r = 0; | |
43dc0e16 MT |
1094 | |
1095 | DEBUG(jail->pakfire, "Sending signal...\n"); | |
1096 | ||
743f449e MT |
1097 | // Write to the file descriptor |
1098 | ssize_t bytes_written = write(fd, &val, sizeof(val)); | |
1099 | if (bytes_written < 0 || (size_t)bytes_written < sizeof(val)) { | |
1100 | ERROR(jail->pakfire, "Could not send signal: %m\n"); | |
1101 | r = 1; | |
1102 | } | |
1103 | ||
1104 | // Close the file descriptor | |
43dc0e16 MT |
1105 | close(fd); |
1106 | ||
743f449e | 1107 | return r; |
43dc0e16 MT |
1108 | } |
1109 | ||
1110 | static int pakfire_jail_wait_for_signal(struct pakfire_jail* jail, int fd) { | |
743f449e MT |
1111 | uint64_t val = 0; |
1112 | int r = 0; | |
43dc0e16 MT |
1113 | |
1114 | DEBUG(jail->pakfire, "Waiting for signal...\n"); | |
1115 | ||
743f449e MT |
1116 | ssize_t bytes_read = read(fd, &val, sizeof(val)); |
1117 | if (bytes_read < 0 || (size_t)bytes_read < sizeof(val)) { | |
1118 | ERROR(jail->pakfire, "Error waiting for signal: %m\n"); | |
1119 | r = 1; | |
1120 | } | |
1121 | ||
1122 | // Close the file descriptor | |
43dc0e16 MT |
1123 | close(fd); |
1124 | ||
743f449e | 1125 | return r; |
43dc0e16 MT |
1126 | } |
1127 | ||
2015cb92 MT |
1128 | static int pakfire_jail_stream_stdin(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx) { |
1129 | int r; | |
1130 | ||
1131 | // Nothing to do if there is no stdin callback set | |
1132 | if (!ctx->communicate.in) { | |
1133 | DEBUG(jail->pakfire, "Callback for standard input is not set\n"); | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | int* fd = &ctx->pipes.stdin[1]; | |
1138 | ||
1139 | DEBUG(jail->pakfire, "Streaming standard input...\n"); | |
1140 | ||
1141 | // Calling the callback | |
1142 | r = ctx->communicate.in(jail->pakfire, ctx->communicate.data, *fd); | |
1143 | ||
1144 | DEBUG(jail->pakfire, "Standard input callback finished: %d\n", r); | |
1145 | ||
1146 | // Close the file descriptor when we are done | |
1147 | close(*fd); | |
1148 | *fd = 0; | |
1149 | ||
1150 | return r; | |
1151 | } | |
1152 | ||
679ee2fa MT |
1153 | /* |
1154 | Performs the initialisation that needs to happen in the parent part | |
1155 | */ | |
f7d240a7 | 1156 | static int pakfire_jail_parent(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx) { |
679ee2fa MT |
1157 | int r; |
1158 | ||
abe4ee37 MT |
1159 | // Setup UID mapping |
1160 | r = pakfire_jail_setup_uid_mapping(jail, ctx->pid); | |
679ee2fa MT |
1161 | if (r) |
1162 | return r; | |
1163 | ||
abe4ee37 MT |
1164 | // Write "deny" to /proc/PID/setgroups |
1165 | r = pakfire_jail_setgroups(jail, ctx->pid); | |
78d7488a MT |
1166 | if (r) |
1167 | return r; | |
1168 | ||
679ee2fa | 1169 | // Setup GID mapping |
616f1fca | 1170 | r = pakfire_jail_setup_gid_mapping(jail, ctx->pid); |
679ee2fa MT |
1171 | if (r) |
1172 | return r; | |
1173 | ||
43dc0e16 MT |
1174 | // Parent has finished initialisation |
1175 | DEBUG(jail->pakfire, "Parent has finished initialization\n"); | |
1176 | ||
1177 | // Send signal to client | |
f7d240a7 | 1178 | r = pakfire_jail_send_signal(jail, ctx->completed_fd); |
43dc0e16 MT |
1179 | if (r) |
1180 | return r; | |
1181 | ||
2015cb92 MT |
1182 | // Stream standard input |
1183 | r = pakfire_jail_stream_stdin(jail, ctx); | |
1184 | if (r) | |
1185 | return r; | |
1186 | ||
679ee2fa MT |
1187 | return 0; |
1188 | } | |
1189 | ||
616f1fca | 1190 | static int pakfire_jail_child(struct pakfire_jail* jail, struct pakfire_jail_exec* ctx, |
f7d240a7 | 1191 | const char* argv[]) { |
43dc0e16 MT |
1192 | int r; |
1193 | ||
e33387d3 MT |
1194 | // Redirect any logging to our log pipe |
1195 | pakfire_set_log_callback(jail->pakfire, pakfire_jail_log, &ctx->pipes); | |
0bd84dc1 | 1196 | |
2a7b5e00 MT |
1197 | // Die with parent |
1198 | r = prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); | |
1199 | if (r) { | |
1200 | ERROR(jail->pakfire, "Could not configure to die with parent: %m\n"); | |
1201 | return 126; | |
1202 | } | |
1203 | ||
cf440db8 MT |
1204 | // Fetch my own PID |
1205 | pid_t pid = getpid(); | |
1206 | ||
1207 | DEBUG(jail->pakfire, "Launched child process in jail with PID %d\n", pid); | |
0bd84dc1 | 1208 | |
43dc0e16 | 1209 | // Wait for the parent to finish initialization |
f7d240a7 | 1210 | r = pakfire_jail_wait_for_signal(jail, ctx->completed_fd); |
43dc0e16 MT |
1211 | if (r) |
1212 | return r; | |
1213 | ||
4f59c39b MT |
1214 | // Perform further initialization |
1215 | ||
1216 | // Fetch UID/GID | |
1217 | uid_t uid = getuid(); | |
1218 | gid_t gid = getgid(); | |
1219 | ||
1220 | // Fetch EUID/EGID | |
1221 | uid_t euid = geteuid(); | |
1222 | gid_t egid = getegid(); | |
1223 | ||
1224 | DEBUG(jail->pakfire, " UID: %d (effective %d)\n", uid, euid); | |
1225 | DEBUG(jail->pakfire, " GID: %d (effective %d)\n", gid, egid); | |
1226 | ||
1227 | // Check if we are (effectively running as root) | |
4f719e21 | 1228 | if (uid || gid || euid || egid) { |
4f59c39b MT |
1229 | ERROR(jail->pakfire, "Child process is not running as root\n"); |
1230 | return 126; | |
1231 | } | |
1232 | ||
1233 | const char* root = pakfire_get_path(jail->pakfire); | |
1234 | const char* arch = pakfire_get_arch(jail->pakfire); | |
1235 | ||
1236 | // Change root (unless root is /) | |
1237 | if (!pakfire_on_root(jail->pakfire)) { | |
1238 | // Mount everything | |
cc6e2264 | 1239 | r = pakfire_jail_mount(jail); |
4f59c39b MT |
1240 | if (r) |
1241 | return r; | |
1242 | ||
4f59c39b MT |
1243 | // Call chroot() |
1244 | r = chroot(root); | |
1245 | if (r) { | |
1246 | ERROR(jail->pakfire, "chroot() to %s failed: %m\n", root); | |
1247 | return 1; | |
1248 | } | |
1249 | ||
1250 | // Change directory to / | |
1251 | r = chdir("/"); | |
1252 | if (r) { | |
1253 | ERROR(jail->pakfire, "chdir() after chroot() failed: %m\n"); | |
1254 | return 1; | |
1255 | } | |
1256 | } | |
1257 | ||
90d92b5c MT |
1258 | // Set personality |
1259 | unsigned long persona = pakfire_arch_personality(arch); | |
1260 | if (persona) { | |
1261 | r = personality(persona); | |
1262 | if (r < 0) { | |
1263 | ERROR(jail->pakfire, "Could not set personality (%x)\n", (unsigned int)persona); | |
1264 | return 1; | |
1265 | } | |
1266 | } | |
1267 | ||
cf440db8 MT |
1268 | // Set nice level |
1269 | if (jail->nice) { | |
1270 | DEBUG(jail->pakfire, "Setting nice level to %d\n", jail->nice); | |
1271 | ||
1272 | r = setpriority(PRIO_PROCESS, pid, jail->nice); | |
1273 | if (r) { | |
1274 | ERROR(jail->pakfire, "Could not set nice level: %m\n"); | |
1275 | return 1; | |
1276 | } | |
1277 | } | |
1278 | ||
e33387d3 MT |
1279 | // Close other end of log pipes |
1280 | close(ctx->pipes.log_INFO[0]); | |
1281 | close(ctx->pipes.log_ERROR[0]); | |
1282 | #ifdef ENABLE_DEBUG | |
1283 | close(ctx->pipes.log_DEBUG[0]); | |
1284 | #endif /* ENABLE_DEBUG */ | |
1285 | ||
2015cb92 MT |
1286 | // Connect standard input |
1287 | if (ctx->pipes.stdin[0]) { | |
1288 | r = dup2(ctx->pipes.stdin[0], STDIN_FILENO); | |
1289 | if (r < 0) { | |
1290 | ERROR(jail->pakfire, "Could not connect fd %d to stdin: %m\n", | |
1291 | ctx->pipes.stdin[0]); | |
1292 | ||
1293 | return 1; | |
1294 | } | |
1295 | } | |
1296 | ||
7ebfb7cb MT |
1297 | // Connect standard output and error |
1298 | if (ctx->pipes.stdout[1] && ctx->pipes.stderr[1]) { | |
1299 | r = dup2(ctx->pipes.stdout[1], STDOUT_FILENO); | |
1300 | if (r < 0) { | |
1301 | ERROR(jail->pakfire, "Could not connect fd %d to stdout: %m\n", | |
1302 | ctx->pipes.stdout[1]); | |
1303 | ||
1304 | return 1; | |
1305 | } | |
1306 | ||
1307 | r = dup2(ctx->pipes.stderr[1], STDERR_FILENO); | |
1308 | if (r < 0) { | |
1309 | ERROR(jail->pakfire, "Could not connect fd %d to stderr: %m\n", | |
1310 | ctx->pipes.stderr[1]); | |
1311 | ||
1312 | return 1; | |
1313 | } | |
1314 | ||
195fe455 | 1315 | // Close the pipe (as we have moved the original file descriptors) |
2015cb92 | 1316 | pakfire_jail_close_pipe(jail, ctx->pipes.stdin); |
195fe455 MT |
1317 | pakfire_jail_close_pipe(jail, ctx->pipes.stdout); |
1318 | pakfire_jail_close_pipe(jail, ctx->pipes.stderr); | |
7ebfb7cb MT |
1319 | } |
1320 | ||
007bc66c MT |
1321 | // Reset open file limit (http://0pointer.net/blog/file-descriptor-limits.html) |
1322 | r = pakfire_rlimit_reset_nofile(jail->pakfire); | |
1323 | if (r) | |
1324 | return r; | |
1325 | ||
980b15af MT |
1326 | // Drop capabilities |
1327 | r = pakfire_jail_drop_capabilities(jail); | |
1328 | if (r) | |
1329 | return r; | |
1330 | ||
739d5b57 MT |
1331 | // Filter syscalls |
1332 | r = pakfire_jail_limit_syscalls(jail); | |
1333 | if (r) | |
1334 | return r; | |
1335 | ||
2015cb92 MT |
1336 | DEBUG(jail->pakfire, "Child process initialization done\n"); |
1337 | DEBUG(jail->pakfire, "Launching command:\n"); | |
1338 | ||
1339 | // Log argv | |
1340 | for (unsigned int i = 0; argv[i]; i++) | |
1341 | DEBUG(jail->pakfire, " argv[%d] = %s\n", i, argv[i]); | |
1342 | ||
b3498aeb MT |
1343 | // exec() command |
1344 | r = execvpe(argv[0], (char**)argv, jail->env); | |
1345 | if (r < 0) | |
1346 | ERROR(jail->pakfire, "Could not execve(): %m\n"); | |
1347 | ||
1348 | // Translate errno into regular exit code | |
1349 | switch (errno) { | |
1350 | case ENOENT: | |
1351 | r = 127; | |
1352 | break; | |
1353 | ||
1354 | default: | |
1355 | r = 1; | |
1356 | } | |
1357 | ||
1358 | // We should not get here | |
1359 | return r; | |
0bd84dc1 MT |
1360 | } |
1361 | ||
9f50bf71 | 1362 | // Run a command in the jail |
db4f234f | 1363 | static int __pakfire_jail_exec(struct pakfire_jail* jail, const char* argv[], |
2015cb92 MT |
1364 | const int interactive, |
1365 | pakfire_jail_communicate_in communicate_in, | |
1366 | pakfire_jail_communicate_out communicate_out, | |
1367 | void* data) { | |
4f59c39b | 1368 | int exit = -1; |
0bd84dc1 MT |
1369 | int r; |
1370 | ||
b3498aeb MT |
1371 | // Check if argv is valid |
1372 | if (!argv || !argv[0]) { | |
1373 | errno = EINVAL; | |
1374 | return -1; | |
1375 | } | |
1376 | ||
2015cb92 MT |
1377 | // Send any output to the default logger if no callback is set |
1378 | if (!communicate_out) | |
1379 | communicate_out = pakfire_jail_default_log_callback; | |
1380 | ||
616f1fca MT |
1381 | // Initialize context for this call |
1382 | struct pakfire_jail_exec ctx = { | |
1383 | .pipes = { | |
2015cb92 MT |
1384 | .stdin = { 0, 0 }, |
1385 | .stdout = { 0, 0 }, | |
1386 | .stderr = { 0, 0 }, | |
1387 | }, | |
1388 | ||
1389 | .communicate = { | |
1390 | .in = communicate_in, | |
1391 | .out = communicate_out, | |
1392 | .data = data, | |
616f1fca | 1393 | }, |
616f1fca MT |
1394 | }; |
1395 | ||
0bd84dc1 MT |
1396 | DEBUG(jail->pakfire, "Executing jail...\n"); |
1397 | ||
43dc0e16 MT |
1398 | /* |
1399 | Setup a file descriptor which can be used to notify the client that the parent | |
1400 | has completed configuration. | |
1401 | */ | |
f7d240a7 MT |
1402 | ctx.completed_fd = eventfd(0, EFD_CLOEXEC); |
1403 | if (ctx.completed_fd < 0) { | |
43dc0e16 MT |
1404 | ERROR(jail->pakfire, "eventfd() failed: %m\n"); |
1405 | return -1; | |
1406 | } | |
1407 | ||
616f1fca | 1408 | // Create pipes to communicate with child process if we are not running interactively |
58963c75 | 1409 | if (!interactive) { |
2015cb92 MT |
1410 | // stdin (only if callback is set) |
1411 | if (ctx.communicate.in) { | |
1412 | r = pakfire_jail_setup_pipe(jail, &ctx.pipes.stdin, 0); | |
1413 | if (r) | |
1414 | goto ERROR; | |
1415 | } | |
1416 | ||
616f1fca | 1417 | // stdout |
e33387d3 MT |
1418 | r = pakfire_jail_setup_pipe(jail, &ctx.pipes.stdout, 0); |
1419 | if (r) | |
616f1fca | 1420 | goto ERROR; |
616f1fca MT |
1421 | |
1422 | // stderr | |
e33387d3 MT |
1423 | r = pakfire_jail_setup_pipe(jail, &ctx.pipes.stderr, 0); |
1424 | if (r) | |
616f1fca | 1425 | goto ERROR; |
616f1fca MT |
1426 | } |
1427 | ||
e33387d3 MT |
1428 | // Setup pipes for logging |
1429 | // INFO | |
1430 | r = pakfire_jail_setup_pipe(jail, &ctx.pipes.log_INFO, O_CLOEXEC); | |
1431 | if (r) | |
1432 | goto ERROR; | |
1433 | ||
1434 | // ERROR | |
1435 | r = pakfire_jail_setup_pipe(jail, &ctx.pipes.log_ERROR, O_CLOEXEC); | |
1436 | if (r) | |
1437 | goto ERROR; | |
1438 | ||
1439 | #ifdef ENABLE_DEBUG | |
1440 | // DEBUG | |
1441 | r = pakfire_jail_setup_pipe(jail, &ctx.pipes.log_DEBUG, O_CLOEXEC); | |
1442 | if (r) | |
1443 | goto ERROR; | |
1444 | #endif /* ENABLE_DEBUG */ | |
1445 | ||
0bd84dc1 MT |
1446 | // Configure child process |
1447 | struct clone_args args = { | |
1448 | .flags = | |
1449 | CLONE_NEWCGROUP | | |
1450 | CLONE_NEWIPC | | |
1451 | CLONE_NEWNS | | |
1452 | CLONE_NEWPID | | |
1453 | CLONE_NEWUSER | | |
d853213d | 1454 | CLONE_NEWUTS | |
02fd4f8b | 1455 | CLONE_PIDFD, |
0bd84dc1 | 1456 | .exit_signal = SIGCHLD, |
d853213d | 1457 | .pidfd = (long long unsigned int)&ctx.pidfd, |
0bd84dc1 MT |
1458 | }; |
1459 | ||
aca565fc | 1460 | // Launch the process in a cgroup that is a leaf of the configured cgroup |
02fd4f8b MT |
1461 | if (jail->cgroup) { |
1462 | args.flags |= CLONE_INTO_CGROUP; | |
1463 | ||
ae5201c5 MT |
1464 | // Fetch our UUID |
1465 | const char* uuid = pakfire_jail_uuid(jail); | |
aca565fc MT |
1466 | |
1467 | // Create a temporary cgroup | |
ae5201c5 | 1468 | r = pakfire_cgroup_child(&ctx.cgroup, jail->cgroup, uuid, 0); |
aca565fc MT |
1469 | if (r) { |
1470 | ERROR(jail->pakfire, "Could not create cgroup for jail: %m\n"); | |
1471 | goto ERROR; | |
1472 | } | |
1473 | ||
02fd4f8b | 1474 | // Clone into this cgroup |
aca565fc | 1475 | args.cgroup = pakfire_cgroup_fd(ctx.cgroup); |
02fd4f8b MT |
1476 | } |
1477 | ||
0bd84dc1 | 1478 | // Fork this process |
616f1fca MT |
1479 | ctx.pid = clone3(&args, sizeof(args)); |
1480 | if (ctx.pid < 0) { | |
0bd84dc1 MT |
1481 | ERROR(jail->pakfire, "Could not clone: %m\n"); |
1482 | return -1; | |
1483 | ||
1484 | // Child process | |
616f1fca | 1485 | } else if (ctx.pid == 0) { |
f7d240a7 | 1486 | r = pakfire_jail_child(jail, &ctx, argv); |
0bd84dc1 MT |
1487 | _exit(r); |
1488 | } | |
1489 | ||
679ee2fa | 1490 | // Parent process |
f7d240a7 | 1491 | r = pakfire_jail_parent(jail, &ctx); |
679ee2fa MT |
1492 | if (r) |
1493 | goto ERROR; | |
1494 | ||
616f1fca | 1495 | DEBUG(jail->pakfire, "Waiting for PID %d to finish its work\n", ctx.pid); |
0bd84dc1 | 1496 | |
616f1fca | 1497 | // Read output of the child process |
d853213d MT |
1498 | r = pakfire_jail_wait(jail, &ctx); |
1499 | if (r) | |
1500 | goto ERROR; | |
0bd84dc1 | 1501 | |
d853213d MT |
1502 | // Handle exit status |
1503 | switch (ctx.status.si_code) { | |
1504 | case CLD_EXITED: | |
1505 | DEBUG(jail->pakfire, "The child process exited with code %d\n", | |
1506 | ctx.status.si_status); | |
616f1fca | 1507 | |
d853213d MT |
1508 | // Pass exit code |
1509 | exit = ctx.status.si_status; | |
1510 | break; | |
0bd84dc1 | 1511 | |
d853213d MT |
1512 | case CLD_KILLED: |
1513 | case CLD_DUMPED: | |
1514 | ERROR(jail->pakfire, "The child process was killed\n"); | |
1515 | break; | |
0bd84dc1 | 1516 | |
d853213d MT |
1517 | // Log anything else |
1518 | default: | |
1519 | ERROR(jail->pakfire, "Unknown child exit code: %d\n", ctx.status.si_code); | |
1520 | break; | |
0bd84dc1 MT |
1521 | } |
1522 | ||
679ee2fa | 1523 | ERROR: |
aca565fc MT |
1524 | // Destroy the temporary cgroup (if any) |
1525 | if (ctx.cgroup) { | |
6b7cf275 MT |
1526 | // Read cgroup stats |
1527 | r = pakfire_cgroup_stat(ctx.cgroup, &ctx.cgroup_stats); | |
1528 | if (r) { | |
1529 | ERROR(jail->pakfire, "Could not read cgroup stats: %m\n"); | |
1530 | } else { | |
1531 | pakfire_cgroup_stat_dump(ctx.cgroup, &ctx.cgroup_stats); | |
1532 | } | |
1533 | ||
aca565fc MT |
1534 | pakfire_cgroup_destroy(ctx.cgroup); |
1535 | pakfire_cgroup_unref(ctx.cgroup); | |
1536 | } | |
1537 | ||
616f1fca | 1538 | // Close any file descriptors |
2015cb92 | 1539 | pakfire_jail_close_pipe(jail, ctx.pipes.stdin); |
e33387d3 MT |
1540 | pakfire_jail_close_pipe(jail, ctx.pipes.stdout); |
1541 | pakfire_jail_close_pipe(jail, ctx.pipes.stderr); | |
d853213d MT |
1542 | if (ctx.pidfd) |
1543 | close(ctx.pidfd); | |
e33387d3 MT |
1544 | pakfire_jail_close_pipe(jail, ctx.pipes.log_INFO); |
1545 | pakfire_jail_close_pipe(jail, ctx.pipes.log_ERROR); | |
1546 | pakfire_jail_close_pipe(jail, ctx.pipes.log_DEBUG); | |
616f1fca | 1547 | |
4f59c39b | 1548 | return exit; |
9f50bf71 | 1549 | } |
a45ed6b0 | 1550 | |
ccdd2e95 | 1551 | PAKFIRE_EXPORT int pakfire_jail_exec( |
2015cb92 MT |
1552 | struct pakfire_jail* jail, |
1553 | const char* argv[], | |
1554 | pakfire_jail_communicate_in callback_in, | |
1555 | pakfire_jail_communicate_out callback_out, | |
1556 | void* data) { | |
1557 | return __pakfire_jail_exec(jail, argv, 0, callback_in, callback_out, data); | |
1558 | } | |
1559 | ||
db4f234f MT |
1560 | static int pakfire_jail_exec_interactive( |
1561 | struct pakfire_jail* jail, const char* argv[]) { | |
1562 | int r; | |
1563 | ||
1564 | // Setup interactive stuff | |
1565 | r = pakfire_jail_setup_interactive_env(jail); | |
1566 | if (r) | |
1567 | return r; | |
1568 | ||
2015cb92 | 1569 | return __pakfire_jail_exec(jail, argv, 1, NULL, NULL, NULL); |
db4f234f MT |
1570 | } |
1571 | ||
ccdd2e95 MT |
1572 | int pakfire_jail_exec_script(struct pakfire_jail* jail, |
1573 | const char* script, | |
1574 | const size_t size, | |
1575 | const char* args[], | |
1576 | pakfire_jail_communicate_in callback_in, | |
1577 | pakfire_jail_communicate_out callback_out, | |
1578 | void* data) { | |
a45ed6b0 MT |
1579 | char path[PATH_MAX]; |
1580 | const char** argv = NULL; | |
35291cb7 | 1581 | FILE* f = NULL; |
a45ed6b0 MT |
1582 | int r; |
1583 | ||
1584 | const char* root = pakfire_get_path(jail->pakfire); | |
1585 | ||
1586 | // Write the scriptlet to disk | |
35291cb7 | 1587 | r = pakfire_path_join(path, root, PAKFIRE_TMP_DIR "/pakfire-script.XXXXXX"); |
56796f84 | 1588 | if (r) |
a45ed6b0 MT |
1589 | goto ERROR; |
1590 | ||
35291cb7 MT |
1591 | // Create a temporary file |
1592 | f = pakfire_mktemp(path, 0700); | |
1593 | if (!f) { | |
1594 | ERROR(jail->pakfire, "Could not create temporary file: %m\n"); | |
a45ed6b0 MT |
1595 | goto ERROR; |
1596 | } | |
1597 | ||
1598 | DEBUG(jail->pakfire, "Writing script to %s:\n%.*s\n", path, (int)size, script); | |
1599 | ||
1600 | // Write data | |
35291cb7 MT |
1601 | r = fprintf(f, "%s", script); |
1602 | if (r < 0) { | |
a45ed6b0 | 1603 | ERROR(jail->pakfire, "Could not write script to file %s: %m\n", path); |
a45ed6b0 MT |
1604 | goto ERROR; |
1605 | } | |
1606 | ||
1607 | // Close file | |
35291cb7 | 1608 | r = fclose(f); |
a45ed6b0 MT |
1609 | if (r) { |
1610 | ERROR(jail->pakfire, "Could not close script file %s: %m\n", path); | |
a45ed6b0 MT |
1611 | goto ERROR; |
1612 | } | |
1613 | ||
35291cb7 MT |
1614 | f = NULL; |
1615 | ||
a45ed6b0 MT |
1616 | // Count how many arguments were passed |
1617 | unsigned int argc = 1; | |
1618 | if (args) { | |
1619 | for (const char** arg = args; *arg; arg++) | |
1620 | argc++; | |
1621 | } | |
1622 | ||
1623 | argv = calloc(argc + 1, sizeof(*argv)); | |
1624 | if (!argv) { | |
1625 | ERROR(jail->pakfire, "Could not allocate argv: %m\n"); | |
1626 | goto ERROR; | |
1627 | } | |
1628 | ||
1629 | // Set command | |
1630 | argv[0] = (root) ? pakfire_path_relpath(root, path) : path; | |
1631 | ||
1632 | // Copy args | |
1633 | for (unsigned int i = 1; i < argc; i++) | |
1634 | argv[i] = args[i-1]; | |
1635 | ||
1636 | // Run the script | |
ccdd2e95 | 1637 | r = pakfire_jail_exec(jail, argv, callback_in, callback_out, data); |
a45ed6b0 MT |
1638 | |
1639 | ERROR: | |
1640 | if (argv) | |
1641 | free(argv); | |
35291cb7 MT |
1642 | if (f) |
1643 | fclose(f); | |
a45ed6b0 MT |
1644 | |
1645 | // Remove script from disk | |
1646 | if (*path) | |
1647 | unlink(path); | |
1648 | ||
1649 | return r; | |
1650 | } | |
82df3c77 MT |
1651 | |
1652 | /* | |
1653 | A convenience function that creates a new jail, runs the given command and destroys | |
1654 | the jail again. | |
1655 | */ | |
12b9b39f | 1656 | int pakfire_jail_run(struct pakfire* pakfire, const char* argv[], int flags, char** output) { |
82df3c77 MT |
1657 | struct pakfire_jail* jail = NULL; |
1658 | int r; | |
1659 | ||
1660 | // Create a new jail | |
1661 | r = pakfire_jail_create(&jail, pakfire, flags); | |
1662 | if (r) | |
1663 | goto ERROR; | |
1664 | ||
1665 | // Execute the command | |
ccdd2e95 | 1666 | r = pakfire_jail_exec(jail, argv, NULL, pakfire_jail_capture_stdout, output); |
82df3c77 MT |
1667 | |
1668 | ERROR: | |
1669 | if (jail) | |
1670 | pakfire_jail_unref(jail); | |
1671 | ||
1672 | return r; | |
1673 | } | |
4f688bd8 MT |
1674 | |
1675 | int pakfire_jail_run_script(struct pakfire* pakfire, | |
49a9babc | 1676 | const char* script, const size_t length, const char* argv[], int flags) { |
4f688bd8 MT |
1677 | struct pakfire_jail* jail = NULL; |
1678 | int r; | |
1679 | ||
1680 | // Create a new jail | |
1681 | r = pakfire_jail_create(&jail, pakfire, flags); | |
1682 | if (r) | |
1683 | goto ERROR; | |
1684 | ||
1685 | // Execute the command | |
49a9babc | 1686 | r = pakfire_jail_exec_script(jail, script, length, argv, NULL, NULL, NULL); |
4f688bd8 MT |
1687 | |
1688 | ERROR: | |
1689 | if (jail) | |
1690 | pakfire_jail_unref(jail); | |
1691 | ||
1692 | return r; | |
1693 | } | |
e43489f7 | 1694 | |
5f6e42a2 | 1695 | int pakfire_jail_shell(struct pakfire_jail* jail) { |
e43489f7 MT |
1696 | const char* argv[] = { |
1697 | "/bin/bash", "--login", NULL, | |
1698 | }; | |
1699 | ||
1700 | // Execute /bin/bash | |
db4f234f | 1701 | return pakfire_jail_exec_interactive(jail, argv); |
e43489f7 MT |
1702 | } |
1703 | ||
1704 | int pakfire_jail_ldconfig(struct pakfire* pakfire) { | |
1705 | char path[PATH_MAX]; | |
1706 | ||
1707 | const char* ldconfig = "/sbin/ldconfig"; | |
1708 | ||
1709 | // Check if ldconfig exists before calling it to avoid overhead | |
77e26129 MT |
1710 | int r = pakfire_path(pakfire, path, "%s", ldconfig); |
1711 | if (r) | |
1712 | return r; | |
e43489f7 MT |
1713 | |
1714 | // Check if ldconfig is executable | |
1715 | r = access(path, X_OK); | |
1716 | if (r) { | |
1717 | DEBUG(pakfire, "%s is not executable. Skipping...\n", ldconfig); | |
1718 | return 0; | |
1719 | } | |
1720 | ||
1721 | const char* argv[] = { | |
1722 | ldconfig, NULL, | |
1723 | }; | |
1724 | ||
1725 | // Run ldconfig | |
1726 | return pakfire_jail_run(pakfire, argv, 0, NULL); | |
1727 | } |