]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 | 2 | /*** |
a7334b09 | 3 | Copyright 2010 Lennart Poettering |
a7334b09 LP |
4 | ***/ |
5 | ||
11c3a366 | 6 | #include <alloca.h> |
60918275 | 7 | #include <errno.h> |
f6c2284a | 8 | #include <fcntl.h> |
f6c2284a LP |
9 | #include <sched.h> |
10 | #include <signal.h> | |
11 | #include <stdarg.h> | |
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <string.h> | |
87d2c1ff | 15 | #include <sys/mman.h> |
f6c2284a | 16 | #include <sys/prctl.h> |
11c3a366 TA |
17 | #include <sys/statfs.h> |
18 | #include <sys/sysmacros.h> | |
f6c2284a | 19 | #include <sys/types.h> |
f6c2284a | 20 | #include <unistd.h> |
eef46c37 | 21 | |
b5efdb8a | 22 | #include "alloc-util.h" |
c43b2b9c | 23 | #include "btrfs-util.h" |
3f6fd1ba | 24 | #include "build.h" |
d9ab2bcf | 25 | #include "cgroup-util.h" |
f6c2284a | 26 | #include "def.h" |
553e15f2 | 27 | #include "device-nodes.h" |
cf0fbc49 | 28 | #include "dirent-util.h" |
3ffd4af2 | 29 | #include "fd-util.h" |
f6c2284a | 30 | #include "fileio.h" |
f97b34a6 | 31 | #include "format-util.h" |
f6c2284a LP |
32 | #include "hashmap.h" |
33 | #include "hostname-util.h" | |
a9f5d454 | 34 | #include "log.h" |
f6c2284a LP |
35 | #include "macro.h" |
36 | #include "missing.h" | |
6bedfcbb | 37 | #include "parse-util.h" |
9eb977db | 38 | #include "path-util.h" |
0b452006 | 39 | #include "process-util.h" |
1e7da35b | 40 | #include "procfs-util.h" |
11c3a366 | 41 | #include "set.h" |
93cc7779 | 42 | #include "signal-util.h" |
cf0fbc49 | 43 | #include "stat-util.h" |
07630cea | 44 | #include "string-util.h" |
f6c2284a | 45 | #include "strv.h" |
93cc7779 | 46 | #include "time-util.h" |
8612da97 | 47 | #include "umask-util.h" |
b1d4f8e1 | 48 | #include "user-util.h" |
4f5dd394 | 49 | #include "util.h" |
9ce17593 | 50 | #include "virt.h" |
56cf987f | 51 | |
9a0e6896 LP |
52 | int saved_argc = 0; |
53 | char **saved_argv = NULL; | |
dcd61450 | 54 | static int saved_in_initrd = -1; |
9086e840 | 55 | |
37f85e66 | 56 | size_t page_size(void) { |
ec202eae | 57 | static thread_local size_t pgsz = 0; |
37f85e66 | 58 | long r; |
59 | ||
87d2c1ff | 60 | if (_likely_(pgsz > 0)) |
37f85e66 | 61 | return pgsz; |
62 | ||
e67f47e5 LP |
63 | r = sysconf(_SC_PAGESIZE); |
64 | assert(r > 0); | |
37f85e66 | 65 | |
66 | pgsz = (size_t) r; | |
37f85e66 | 67 | return pgsz; |
68 | } | |
69 | ||
a88c8750 TG |
70 | bool plymouth_running(void) { |
71 | return access("/run/plymouth/pid", F_OK) >= 0; | |
72 | } | |
73 | ||
4d6d6518 LP |
74 | bool display_is_local(const char *display) { |
75 | assert(display); | |
76 | ||
77 | return | |
78 | display[0] == ':' && | |
79 | display[1] >= '0' && | |
80 | display[1] <= '9'; | |
81 | } | |
82 | ||
83 | int socket_from_display(const char *display, char **path) { | |
84 | size_t k; | |
85 | char *f, *c; | |
86 | ||
87 | assert(display); | |
88 | assert(path); | |
89 | ||
90 | if (!display_is_local(display)) | |
91 | return -EINVAL; | |
92 | ||
93 | k = strspn(display+1, "0123456789"); | |
94 | ||
fbd0b64f | 95 | f = new(char, STRLEN("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
96 | if (!f) |
97 | return -ENOMEM; | |
98 | ||
99 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
100 | memcpy(c, display+1, k); | |
101 | c[k] = 0; | |
102 | ||
103 | *path = f; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
65457142 | 108 | bool kexec_loaded(void) { |
c47f86e6 ZJS |
109 | _cleanup_free_ char *s = NULL; |
110 | ||
111 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) < 0) | |
112 | return false; | |
113 | ||
114 | return s[0] == '1'; | |
65457142 | 115 | } |
fb9de93d | 116 | |
87d2c1ff LP |
117 | int prot_from_flags(int flags) { |
118 | ||
119 | switch (flags & O_ACCMODE) { | |
120 | ||
121 | case O_RDONLY: | |
122 | return PROT_READ; | |
123 | ||
124 | case O_WRONLY: | |
125 | return PROT_WRITE; | |
126 | ||
127 | case O_RDWR: | |
128 | return PROT_READ|PROT_WRITE; | |
129 | ||
130 | default: | |
131 | return -EINVAL; | |
132 | } | |
7c99e0c1 | 133 | } |
689b9a22 | 134 | |
9be346c9 | 135 | bool in_initrd(void) { |
825c6fe5 | 136 | struct statfs s; |
8f33b5b8 | 137 | |
dcd61450 IS |
138 | if (saved_in_initrd >= 0) |
139 | return saved_in_initrd; | |
825c6fe5 LP |
140 | |
141 | /* We make two checks here: | |
142 | * | |
143 | * 1. the flag file /etc/initrd-release must exist | |
144 | * 2. the root file system must be a memory file system | |
145 | * | |
146 | * The second check is extra paranoia, since misdetecting an | |
629ff674 | 147 | * initrd can have bad consequences due the initrd |
825c6fe5 LP |
148 | * emptying when transititioning to the main systemd. |
149 | */ | |
150 | ||
dcd61450 IS |
151 | saved_in_initrd = access("/etc/initrd-release", F_OK) >= 0 && |
152 | statfs("/", &s) >= 0 && | |
153 | is_temporary_fs(&s); | |
9be346c9 | 154 | |
dcd61450 IS |
155 | return saved_in_initrd; |
156 | } | |
157 | ||
158 | void in_initrd_force(bool value) { | |
159 | saved_in_initrd = value; | |
9be346c9 | 160 | } |
069cfc85 | 161 | |
a9e12476 KS |
162 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
163 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 164 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
165 | size_t l, u, idx; |
166 | const void *p; | |
167 | int comparison; | |
168 | ||
2901f4b3 LP |
169 | assert(!size_multiply_overflow(nmemb, size)); |
170 | ||
a9e12476 KS |
171 | l = 0; |
172 | u = nmemb; | |
173 | while (l < u) { | |
174 | idx = (l + u) / 2; | |
2901f4b3 | 175 | p = (const uint8_t*) base + idx * size; |
a9e12476 KS |
176 | comparison = compar(key, p, arg); |
177 | if (comparison < 0) | |
178 | u = idx; | |
179 | else if (comparison > 0) | |
180 | l = idx + 1; | |
181 | else | |
182 | return (void *)p; | |
183 | } | |
184 | return NULL; | |
185 | } | |
09017585 | 186 | |
240dbaa4 LP |
187 | int on_ac_power(void) { |
188 | bool found_offline = false, found_online = false; | |
189 | _cleanup_closedir_ DIR *d = NULL; | |
8fb3f009 | 190 | struct dirent *de; |
240dbaa4 LP |
191 | |
192 | d = opendir("/sys/class/power_supply"); | |
193 | if (!d) | |
6d890034 | 194 | return errno == ENOENT ? true : -errno; |
240dbaa4 | 195 | |
8fb3f009 | 196 | FOREACH_DIRENT(de, d, return -errno) { |
240dbaa4 LP |
197 | _cleanup_close_ int fd = -1, device = -1; |
198 | char contents[6]; | |
199 | ssize_t n; | |
240dbaa4 | 200 | |
240dbaa4 LP |
201 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); |
202 | if (device < 0) { | |
3742095b | 203 | if (IN_SET(errno, ENOENT, ENOTDIR)) |
240dbaa4 LP |
204 | continue; |
205 | ||
206 | return -errno; | |
207 | } | |
208 | ||
209 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
210 | if (fd < 0) { | |
211 | if (errno == ENOENT) | |
212 | continue; | |
213 | ||
214 | return -errno; | |
215 | } | |
216 | ||
217 | n = read(fd, contents, sizeof(contents)); | |
218 | if (n < 0) | |
219 | return -errno; | |
220 | ||
221 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
222 | continue; | |
223 | ||
03e334a1 | 224 | safe_close(fd); |
240dbaa4 LP |
225 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
226 | if (fd < 0) { | |
227 | if (errno == ENOENT) | |
228 | continue; | |
229 | ||
230 | return -errno; | |
231 | } | |
232 | ||
233 | n = read(fd, contents, sizeof(contents)); | |
234 | if (n < 0) | |
235 | return -errno; | |
236 | ||
237 | if (n != 2 || contents[1] != '\n') | |
238 | return -EIO; | |
239 | ||
240 | if (contents[0] == '1') { | |
241 | found_online = true; | |
242 | break; | |
243 | } else if (contents[0] == '0') | |
244 | found_offline = true; | |
245 | else | |
246 | return -EIO; | |
247 | } | |
248 | ||
249 | return found_online || !found_offline; | |
250 | } | |
fabe5c0e | 251 | |
bc9fd78c LP |
252 | int container_get_leader(const char *machine, pid_t *pid) { |
253 | _cleanup_free_ char *s = NULL, *class = NULL; | |
254 | const char *p; | |
255 | pid_t leader; | |
256 | int r; | |
257 | ||
258 | assert(machine); | |
259 | assert(pid); | |
260 | ||
b9a8d250 LP |
261 | if (!machine_name_is_valid(machine)) |
262 | return -EINVAL; | |
263 | ||
63c372cb | 264 | p = strjoina("/run/systemd/machines/", machine); |
1a5a177e | 265 | r = parse_env_file(NULL, p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); |
bc9fd78c LP |
266 | if (r == -ENOENT) |
267 | return -EHOSTDOWN; | |
268 | if (r < 0) | |
269 | return r; | |
270 | if (!s) | |
271 | return -EIO; | |
272 | ||
273 | if (!streq_ptr(class, "container")) | |
274 | return -EIO; | |
275 | ||
276 | r = parse_pid(s, &leader); | |
277 | if (r < 0) | |
278 | return r; | |
279 | if (leader <= 1) | |
280 | return -EIO; | |
281 | ||
282 | *pid = leader; | |
283 | return 0; | |
284 | } | |
285 | ||
671c3419 RM |
286 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd) { |
287 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1, usernsfd = -1; | |
359a06aa | 288 | int rfd = -1; |
bc9fd78c LP |
289 | |
290 | assert(pid >= 0); | |
bc9fd78c | 291 | |
878cd7e9 LP |
292 | if (mntns_fd) { |
293 | const char *mntns; | |
a4475f57 | 294 | |
878cd7e9 LP |
295 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
296 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
297 | if (mntnsfd < 0) | |
298 | return -errno; | |
299 | } | |
bc9fd78c | 300 | |
878cd7e9 LP |
301 | if (pidns_fd) { |
302 | const char *pidns; | |
303 | ||
304 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
305 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
306 | if (pidnsfd < 0) | |
307 | return -errno; | |
308 | } | |
309 | ||
310 | if (netns_fd) { | |
311 | const char *netns; | |
312 | ||
313 | netns = procfs_file_alloca(pid, "ns/net"); | |
314 | netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
315 | if (netnsfd < 0) | |
316 | return -errno; | |
317 | } | |
318 | ||
671c3419 RM |
319 | if (userns_fd) { |
320 | const char *userns; | |
321 | ||
322 | userns = procfs_file_alloca(pid, "ns/user"); | |
323 | usernsfd = open(userns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
324 | if (usernsfd < 0 && errno != ENOENT) | |
325 | return -errno; | |
326 | } | |
327 | ||
878cd7e9 LP |
328 | if (root_fd) { |
329 | const char *root; | |
330 | ||
331 | root = procfs_file_alloca(pid, "root"); | |
332 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
333 | if (rfd < 0) | |
334 | return -errno; | |
335 | } | |
336 | ||
337 | if (pidns_fd) | |
338 | *pidns_fd = pidnsfd; | |
bc9fd78c | 339 | |
878cd7e9 LP |
340 | if (mntns_fd) |
341 | *mntns_fd = mntnsfd; | |
342 | ||
343 | if (netns_fd) | |
344 | *netns_fd = netnsfd; | |
345 | ||
671c3419 RM |
346 | if (userns_fd) |
347 | *userns_fd = usernsfd; | |
348 | ||
878cd7e9 LP |
349 | if (root_fd) |
350 | *root_fd = rfd; | |
351 | ||
671c3419 | 352 | pidnsfd = mntnsfd = netnsfd = usernsfd = -1; |
bc9fd78c LP |
353 | |
354 | return 0; | |
355 | } | |
356 | ||
671c3419 RM |
357 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd) { |
358 | if (userns_fd >= 0) { | |
359 | /* Can't setns to your own userns, since then you could | |
360 | * escalate from non-root to root in your own namespace, so | |
361 | * check if namespaces equal before attempting to enter. */ | |
362 | _cleanup_free_ char *userns_fd_path = NULL; | |
363 | int r; | |
364 | if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0) | |
365 | return -ENOMEM; | |
366 | ||
e3f791a2 | 367 | r = files_same(userns_fd_path, "/proc/self/ns/user", 0); |
671c3419 RM |
368 | if (r < 0) |
369 | return r; | |
370 | if (r) | |
371 | userns_fd = -1; | |
372 | } | |
bc9fd78c | 373 | |
878cd7e9 LP |
374 | if (pidns_fd >= 0) |
375 | if (setns(pidns_fd, CLONE_NEWPID) < 0) | |
376 | return -errno; | |
a4475f57 | 377 | |
878cd7e9 LP |
378 | if (mntns_fd >= 0) |
379 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
380 | return -errno; | |
bc9fd78c | 381 | |
878cd7e9 LP |
382 | if (netns_fd >= 0) |
383 | if (setns(netns_fd, CLONE_NEWNET) < 0) | |
384 | return -errno; | |
bc9fd78c | 385 | |
671c3419 RM |
386 | if (userns_fd >= 0) |
387 | if (setns(userns_fd, CLONE_NEWUSER) < 0) | |
388 | return -errno; | |
389 | ||
878cd7e9 LP |
390 | if (root_fd >= 0) { |
391 | if (fchdir(root_fd) < 0) | |
392 | return -errno; | |
393 | ||
394 | if (chroot(".") < 0) | |
395 | return -errno; | |
396 | } | |
bc9fd78c | 397 | |
b4da6d6b | 398 | return reset_uid_gid(); |
bc9fd78c | 399 | } |
bf108e55 | 400 | |
1c231f56 | 401 | uint64_t physical_memory(void) { |
d9ab2bcf LP |
402 | _cleanup_free_ char *root = NULL, *value = NULL; |
403 | uint64_t mem, lim; | |
404 | size_t ps; | |
405 | long sc; | |
bd969ee6 | 406 | int r; |
1c231f56 | 407 | |
d9ab2bcf LP |
408 | /* We return this as uint64_t in case we are running as 32bit process on a 64bit kernel with huge amounts of |
409 | * memory. | |
410 | * | |
411 | * In order to support containers nicely that have a configured memory limit we'll take the minimum of the | |
412 | * physically reported amount of memory and the limit configured for the root cgroup, if there is any. */ | |
413 | ||
414 | sc = sysconf(_SC_PHYS_PAGES); | |
415 | assert(sc > 0); | |
416 | ||
417 | ps = page_size(); | |
418 | mem = (uint64_t) sc * (uint64_t) ps; | |
419 | ||
bd969ee6 LP |
420 | r = cg_get_root_path(&root); |
421 | if (r < 0) { | |
422 | log_debug_errno(r, "Failed to determine root cgroup, ignoring cgroup memory limit: %m"); | |
d9ab2bcf | 423 | return mem; |
bd969ee6 | 424 | } |
d9ab2bcf | 425 | |
bd969ee6 LP |
426 | r = cg_all_unified(); |
427 | if (r < 0) { | |
428 | log_debug_errno(r, "Failed to determine root unified mode, ignoring cgroup memory limit: %m"); | |
d9ab2bcf | 429 | return mem; |
bd969ee6 LP |
430 | } |
431 | if (r > 0) { | |
432 | r = cg_get_attribute("memory", root, "memory.max", &value); | |
433 | if (r < 0) { | |
434 | log_debug_errno(r, "Failed to read memory.max cgroup attribute, ignoring cgroup memory limit: %m"); | |
435 | return mem; | |
436 | } | |
d9ab2bcf | 437 | |
bd969ee6 LP |
438 | if (streq(value, "max")) |
439 | return mem; | |
440 | } else { | |
441 | r = cg_get_attribute("memory", root, "memory.limit_in_bytes", &value); | |
442 | if (r < 0) { | |
443 | log_debug_errno(r, "Failed to read memory.limit_in_bytes cgroup attribute, ignoring cgroup memory limit: %m"); | |
444 | return mem; | |
445 | } | |
446 | } | |
447 | ||
448 | r = safe_atou64(value, &lim); | |
449 | if (r < 0) { | |
450 | log_debug_errno(r, "Failed to parse cgroup memory limit '%s', ignoring: %m", value); | |
451 | return mem; | |
452 | } | |
453 | if (lim == UINT64_MAX) | |
d9ab2bcf | 454 | return mem; |
1c231f56 | 455 | |
d9ab2bcf LP |
456 | /* Make sure the limit is a multiple of our own page size */ |
457 | lim /= ps; | |
458 | lim *= ps; | |
1c231f56 | 459 | |
d9ab2bcf | 460 | return MIN(mem, lim); |
1c231f56 | 461 | } |
6db615c1 | 462 | |
d8cf2ac7 LP |
463 | uint64_t physical_memory_scale(uint64_t v, uint64_t max) { |
464 | uint64_t p, m, ps, r; | |
465 | ||
466 | assert(max > 0); | |
467 | ||
468 | /* Returns the physical memory size, multiplied by v divided by max. Returns UINT64_MAX on overflow. On success | |
469 | * the result is a multiple of the page size (rounds down). */ | |
470 | ||
471 | ps = page_size(); | |
472 | assert(ps > 0); | |
473 | ||
474 | p = physical_memory() / ps; | |
475 | assert(p > 0); | |
476 | ||
477 | m = p * v; | |
478 | if (m / p != v) | |
479 | return UINT64_MAX; | |
480 | ||
481 | m /= max; | |
482 | ||
483 | r = m * ps; | |
484 | if (r / ps != m) | |
485 | return UINT64_MAX; | |
486 | ||
487 | return r; | |
488 | } | |
489 | ||
83f8e808 LP |
490 | uint64_t system_tasks_max(void) { |
491 | ||
83f8e808 | 492 | uint64_t a = TASKS_MAX, b = TASKS_MAX; |
1e7da35b | 493 | _cleanup_free_ char *root = NULL; |
0f578ea2 | 494 | int r; |
83f8e808 LP |
495 | |
496 | /* Determine the maximum number of tasks that may run on this system. We check three sources to determine this | |
497 | * limit: | |
498 | * | |
f3a367d6 | 499 | * a) the maximum tasks value the kernel allows on this architecture |
83f8e808 | 500 | * b) the cgroups pids_max attribute for the system |
f3a367d6 | 501 | * c) the kernel's configured maximum PID value |
83f8e808 LP |
502 | * |
503 | * And then pick the smallest of the three */ | |
504 | ||
0f578ea2 LP |
505 | r = procfs_tasks_get_limit(&a); |
506 | if (r < 0) | |
507 | log_debug_errno(r, "Failed to read maximum number of tasks from /proc, ignoring: %m"); | |
83f8e808 | 508 | |
0f578ea2 LP |
509 | r = cg_get_root_path(&root); |
510 | if (r < 0) | |
511 | log_debug_errno(r, "Failed to determine cgroup root path, ignoring: %m"); | |
512 | else { | |
1e7da35b | 513 | _cleanup_free_ char *value = NULL; |
83f8e808 | 514 | |
0f578ea2 LP |
515 | r = cg_get_attribute("pids", root, "pids.max", &value); |
516 | if (r < 0) | |
517 | log_debug_errno(r, "Failed to read pids.max attribute of cgroup root, ignoring: %m"); | |
518 | else if (!streq(value, "max")) { | |
519 | r = safe_atou64(value, &b); | |
520 | if (r < 0) | |
521 | log_debug_errno(r, "Failed to parse pids.max attribute of cgroup root, ignoring: %m"); | |
522 | } | |
83f8e808 LP |
523 | } |
524 | ||
525 | return MIN3(TASKS_MAX, | |
526 | a <= 0 ? TASKS_MAX : a, | |
527 | b <= 0 ? TASKS_MAX : b); | |
528 | } | |
529 | ||
530 | uint64_t system_tasks_max_scale(uint64_t v, uint64_t max) { | |
531 | uint64_t t, m; | |
532 | ||
533 | assert(max > 0); | |
534 | ||
535 | /* Multiply the system's task value by the fraction v/max. Hence, if max==100 this calculates percentages | |
536 | * relative to the system's maximum number of tasks. Returns UINT64_MAX on overflow. */ | |
537 | ||
538 | t = system_tasks_max(); | |
539 | assert(t > 0); | |
540 | ||
541 | m = t * v; | |
542 | if (m / t != v) /* overflow? */ | |
543 | return UINT64_MAX; | |
544 | ||
545 | return m / max; | |
546 | } | |
547 | ||
3f6fd1ba LP |
548 | int version(void) { |
549 | puts(PACKAGE_STRING "\n" | |
550 | SYSTEMD_FEATURES); | |
551 | return 0; | |
552 | } | |
68c58c67 LP |
553 | |
554 | /* This is a direct translation of str_verscmp from boot.c */ | |
555 | static bool is_digit(int c) { | |
556 | return c >= '0' && c <= '9'; | |
557 | } | |
558 | ||
559 | static int c_order(int c) { | |
560 | if (c == 0 || is_digit(c)) | |
561 | return 0; | |
562 | ||
563 | if ((c >= 'a') && (c <= 'z')) | |
564 | return c; | |
565 | ||
566 | return c + 0x10000; | |
567 | } | |
568 | ||
569 | int str_verscmp(const char *s1, const char *s2) { | |
570 | const char *os1, *os2; | |
571 | ||
572 | assert(s1); | |
573 | assert(s2); | |
574 | ||
575 | os1 = s1; | |
576 | os2 = s2; | |
577 | ||
578 | while (*s1 || *s2) { | |
579 | int first; | |
580 | ||
581 | while ((*s1 && !is_digit(*s1)) || (*s2 && !is_digit(*s2))) { | |
582 | int order; | |
583 | ||
584 | order = c_order(*s1) - c_order(*s2); | |
585 | if (order != 0) | |
586 | return order; | |
587 | s1++; | |
588 | s2++; | |
589 | } | |
590 | ||
591 | while (*s1 == '0') | |
592 | s1++; | |
593 | while (*s2 == '0') | |
594 | s2++; | |
595 | ||
596 | first = 0; | |
597 | while (is_digit(*s1) && is_digit(*s2)) { | |
598 | if (first == 0) | |
599 | first = *s1 - *s2; | |
600 | s1++; | |
601 | s2++; | |
602 | } | |
603 | ||
604 | if (is_digit(*s1)) | |
605 | return 1; | |
606 | if (is_digit(*s2)) | |
607 | return -1; | |
608 | ||
609 | if (first != 0) | |
610 | return first; | |
611 | } | |
612 | ||
613 | return strcmp(os1, os2); | |
614 | } | |
9ce17593 JK |
615 | |
616 | /* Turn off core dumps but only if we're running outside of a container. */ | |
e557b1a6 LP |
617 | void disable_coredumps(void) { |
618 | int r; | |
619 | ||
620 | if (detect_container() > 0) | |
621 | return; | |
622 | ||
623 | r = write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0); | |
624 | if (r < 0) | |
625 | log_debug_errno(r, "Failed to turn off coredumps, ignoring: %m"); | |
9ce17593 | 626 | } |