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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
8 | under the terms of the GNU Lesser General Public License as published by |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
10 | (at your option) any later version. |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 15 | Lesser General Public License for more details. |
a7334b09 | 16 | |
5430f7f2 | 17 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
19 | ***/ | |
20 | ||
11c3a366 | 21 | #include <alloca.h> |
60918275 | 22 | #include <errno.h> |
f6c2284a | 23 | #include <fcntl.h> |
f6c2284a LP |
24 | #include <sched.h> |
25 | #include <signal.h> | |
26 | #include <stdarg.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
87d2c1ff | 30 | #include <sys/mman.h> |
f6c2284a | 31 | #include <sys/prctl.h> |
11c3a366 TA |
32 | #include <sys/statfs.h> |
33 | #include <sys/sysmacros.h> | |
f6c2284a | 34 | #include <sys/types.h> |
f6c2284a | 35 | #include <unistd.h> |
eef46c37 | 36 | |
b5efdb8a | 37 | #include "alloc-util.h" |
c43b2b9c | 38 | #include "btrfs-util.h" |
3f6fd1ba | 39 | #include "build.h" |
d9ab2bcf | 40 | #include "cgroup-util.h" |
f6c2284a | 41 | #include "def.h" |
553e15f2 | 42 | #include "device-nodes.h" |
cf0fbc49 | 43 | #include "dirent-util.h" |
3ffd4af2 | 44 | #include "fd-util.h" |
f6c2284a | 45 | #include "fileio.h" |
f97b34a6 | 46 | #include "format-util.h" |
f6c2284a LP |
47 | #include "hashmap.h" |
48 | #include "hostname-util.h" | |
a9f5d454 | 49 | #include "log.h" |
f6c2284a LP |
50 | #include "macro.h" |
51 | #include "missing.h" | |
6bedfcbb | 52 | #include "parse-util.h" |
9eb977db | 53 | #include "path-util.h" |
0b452006 | 54 | #include "process-util.h" |
11c3a366 | 55 | #include "set.h" |
93cc7779 | 56 | #include "signal-util.h" |
cf0fbc49 | 57 | #include "stat-util.h" |
07630cea | 58 | #include "string-util.h" |
f6c2284a | 59 | #include "strv.h" |
93cc7779 | 60 | #include "time-util.h" |
8612da97 | 61 | #include "umask-util.h" |
b1d4f8e1 | 62 | #include "user-util.h" |
4f5dd394 | 63 | #include "util.h" |
56cf987f | 64 | |
9a0e6896 LP |
65 | int saved_argc = 0; |
66 | char **saved_argv = NULL; | |
dcd61450 | 67 | static int saved_in_initrd = -1; |
9086e840 | 68 | |
37f85e66 | 69 | size_t page_size(void) { |
ec202eae | 70 | static thread_local size_t pgsz = 0; |
37f85e66 | 71 | long r; |
72 | ||
87d2c1ff | 73 | if (_likely_(pgsz > 0)) |
37f85e66 | 74 | return pgsz; |
75 | ||
e67f47e5 LP |
76 | r = sysconf(_SC_PAGESIZE); |
77 | assert(r > 0); | |
37f85e66 | 78 | |
79 | pgsz = (size_t) r; | |
37f85e66 | 80 | return pgsz; |
81 | } | |
82 | ||
a88c8750 TG |
83 | bool plymouth_running(void) { |
84 | return access("/run/plymouth/pid", F_OK) >= 0; | |
85 | } | |
86 | ||
4d6d6518 LP |
87 | bool display_is_local(const char *display) { |
88 | assert(display); | |
89 | ||
90 | return | |
91 | display[0] == ':' && | |
92 | display[1] >= '0' && | |
93 | display[1] <= '9'; | |
94 | } | |
95 | ||
96 | int socket_from_display(const char *display, char **path) { | |
97 | size_t k; | |
98 | char *f, *c; | |
99 | ||
100 | assert(display); | |
101 | assert(path); | |
102 | ||
103 | if (!display_is_local(display)) | |
104 | return -EINVAL; | |
105 | ||
106 | k = strspn(display+1, "0123456789"); | |
107 | ||
fbd0b64f | 108 | f = new(char, STRLEN("/tmp/.X11-unix/X") + k + 1); |
4d6d6518 LP |
109 | if (!f) |
110 | return -ENOMEM; | |
111 | ||
112 | c = stpcpy(f, "/tmp/.X11-unix/X"); | |
113 | memcpy(c, display+1, k); | |
114 | c[k] = 0; | |
115 | ||
116 | *path = f; | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
65457142 | 121 | bool kexec_loaded(void) { |
c47f86e6 ZJS |
122 | _cleanup_free_ char *s = NULL; |
123 | ||
124 | if (read_one_line_file("/sys/kernel/kexec_loaded", &s) < 0) | |
125 | return false; | |
126 | ||
127 | return s[0] == '1'; | |
65457142 | 128 | } |
fb9de93d | 129 | |
87d2c1ff LP |
130 | int prot_from_flags(int flags) { |
131 | ||
132 | switch (flags & O_ACCMODE) { | |
133 | ||
134 | case O_RDONLY: | |
135 | return PROT_READ; | |
136 | ||
137 | case O_WRONLY: | |
138 | return PROT_WRITE; | |
139 | ||
140 | case O_RDWR: | |
141 | return PROT_READ|PROT_WRITE; | |
142 | ||
143 | default: | |
144 | return -EINVAL; | |
145 | } | |
7c99e0c1 | 146 | } |
689b9a22 | 147 | |
9be346c9 | 148 | bool in_initrd(void) { |
825c6fe5 | 149 | struct statfs s; |
8f33b5b8 | 150 | |
dcd61450 IS |
151 | if (saved_in_initrd >= 0) |
152 | return saved_in_initrd; | |
825c6fe5 LP |
153 | |
154 | /* We make two checks here: | |
155 | * | |
156 | * 1. the flag file /etc/initrd-release must exist | |
157 | * 2. the root file system must be a memory file system | |
158 | * | |
159 | * The second check is extra paranoia, since misdetecting an | |
629ff674 | 160 | * initrd can have bad consequences due the initrd |
825c6fe5 LP |
161 | * emptying when transititioning to the main systemd. |
162 | */ | |
163 | ||
dcd61450 IS |
164 | saved_in_initrd = access("/etc/initrd-release", F_OK) >= 0 && |
165 | statfs("/", &s) >= 0 && | |
166 | is_temporary_fs(&s); | |
9be346c9 | 167 | |
dcd61450 IS |
168 | return saved_in_initrd; |
169 | } | |
170 | ||
171 | void in_initrd_force(bool value) { | |
172 | saved_in_initrd = value; | |
9be346c9 | 173 | } |
069cfc85 | 174 | |
a9e12476 KS |
175 | /* hey glibc, APIs with callbacks without a user pointer are so useless */ |
176 | void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size, | |
1c574591 | 177 | int (*compar) (const void *, const void *, void *), void *arg) { |
a9e12476 KS |
178 | size_t l, u, idx; |
179 | const void *p; | |
180 | int comparison; | |
181 | ||
182 | l = 0; | |
183 | u = nmemb; | |
184 | while (l < u) { | |
185 | idx = (l + u) / 2; | |
0f2e01a5 | 186 | p = (const char *) base + idx * size; |
a9e12476 KS |
187 | comparison = compar(key, p, arg); |
188 | if (comparison < 0) | |
189 | u = idx; | |
190 | else if (comparison > 0) | |
191 | l = idx + 1; | |
192 | else | |
193 | return (void *)p; | |
194 | } | |
195 | return NULL; | |
196 | } | |
09017585 | 197 | |
240dbaa4 LP |
198 | int on_ac_power(void) { |
199 | bool found_offline = false, found_online = false; | |
200 | _cleanup_closedir_ DIR *d = NULL; | |
8fb3f009 | 201 | struct dirent *de; |
240dbaa4 LP |
202 | |
203 | d = opendir("/sys/class/power_supply"); | |
204 | if (!d) | |
6d890034 | 205 | return errno == ENOENT ? true : -errno; |
240dbaa4 | 206 | |
8fb3f009 | 207 | FOREACH_DIRENT(de, d, return -errno) { |
240dbaa4 LP |
208 | _cleanup_close_ int fd = -1, device = -1; |
209 | char contents[6]; | |
210 | ssize_t n; | |
240dbaa4 | 211 | |
240dbaa4 LP |
212 | device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY); |
213 | if (device < 0) { | |
3742095b | 214 | if (IN_SET(errno, ENOENT, ENOTDIR)) |
240dbaa4 LP |
215 | continue; |
216 | ||
217 | return -errno; | |
218 | } | |
219 | ||
220 | fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
221 | if (fd < 0) { | |
222 | if (errno == ENOENT) | |
223 | continue; | |
224 | ||
225 | return -errno; | |
226 | } | |
227 | ||
228 | n = read(fd, contents, sizeof(contents)); | |
229 | if (n < 0) | |
230 | return -errno; | |
231 | ||
232 | if (n != 6 || memcmp(contents, "Mains\n", 6)) | |
233 | continue; | |
234 | ||
03e334a1 | 235 | safe_close(fd); |
240dbaa4 LP |
236 | fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY); |
237 | if (fd < 0) { | |
238 | if (errno == ENOENT) | |
239 | continue; | |
240 | ||
241 | return -errno; | |
242 | } | |
243 | ||
244 | n = read(fd, contents, sizeof(contents)); | |
245 | if (n < 0) | |
246 | return -errno; | |
247 | ||
248 | if (n != 2 || contents[1] != '\n') | |
249 | return -EIO; | |
250 | ||
251 | if (contents[0] == '1') { | |
252 | found_online = true; | |
253 | break; | |
254 | } else if (contents[0] == '0') | |
255 | found_offline = true; | |
256 | else | |
257 | return -EIO; | |
258 | } | |
259 | ||
260 | return found_online || !found_offline; | |
261 | } | |
fabe5c0e | 262 | |
bc9fd78c LP |
263 | int container_get_leader(const char *machine, pid_t *pid) { |
264 | _cleanup_free_ char *s = NULL, *class = NULL; | |
265 | const char *p; | |
266 | pid_t leader; | |
267 | int r; | |
268 | ||
269 | assert(machine); | |
270 | assert(pid); | |
271 | ||
b9a8d250 LP |
272 | if (!machine_name_is_valid(machine)) |
273 | return -EINVAL; | |
274 | ||
63c372cb | 275 | p = strjoina("/run/systemd/machines/", machine); |
bc9fd78c LP |
276 | r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL); |
277 | if (r == -ENOENT) | |
278 | return -EHOSTDOWN; | |
279 | if (r < 0) | |
280 | return r; | |
281 | if (!s) | |
282 | return -EIO; | |
283 | ||
284 | if (!streq_ptr(class, "container")) | |
285 | return -EIO; | |
286 | ||
287 | r = parse_pid(s, &leader); | |
288 | if (r < 0) | |
289 | return r; | |
290 | if (leader <= 1) | |
291 | return -EIO; | |
292 | ||
293 | *pid = leader; | |
294 | return 0; | |
295 | } | |
296 | ||
671c3419 RM |
297 | int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd) { |
298 | _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1, usernsfd = -1; | |
359a06aa | 299 | int rfd = -1; |
bc9fd78c LP |
300 | |
301 | assert(pid >= 0); | |
bc9fd78c | 302 | |
878cd7e9 LP |
303 | if (mntns_fd) { |
304 | const char *mntns; | |
a4475f57 | 305 | |
878cd7e9 LP |
306 | mntns = procfs_file_alloca(pid, "ns/mnt"); |
307 | mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
308 | if (mntnsfd < 0) | |
309 | return -errno; | |
310 | } | |
bc9fd78c | 311 | |
878cd7e9 LP |
312 | if (pidns_fd) { |
313 | const char *pidns; | |
314 | ||
315 | pidns = procfs_file_alloca(pid, "ns/pid"); | |
316 | pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
317 | if (pidnsfd < 0) | |
318 | return -errno; | |
319 | } | |
320 | ||
321 | if (netns_fd) { | |
322 | const char *netns; | |
323 | ||
324 | netns = procfs_file_alloca(pid, "ns/net"); | |
325 | netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
326 | if (netnsfd < 0) | |
327 | return -errno; | |
328 | } | |
329 | ||
671c3419 RM |
330 | if (userns_fd) { |
331 | const char *userns; | |
332 | ||
333 | userns = procfs_file_alloca(pid, "ns/user"); | |
334 | usernsfd = open(userns, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
335 | if (usernsfd < 0 && errno != ENOENT) | |
336 | return -errno; | |
337 | } | |
338 | ||
878cd7e9 LP |
339 | if (root_fd) { |
340 | const char *root; | |
341 | ||
342 | root = procfs_file_alloca(pid, "root"); | |
343 | rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY); | |
344 | if (rfd < 0) | |
345 | return -errno; | |
346 | } | |
347 | ||
348 | if (pidns_fd) | |
349 | *pidns_fd = pidnsfd; | |
bc9fd78c | 350 | |
878cd7e9 LP |
351 | if (mntns_fd) |
352 | *mntns_fd = mntnsfd; | |
353 | ||
354 | if (netns_fd) | |
355 | *netns_fd = netnsfd; | |
356 | ||
671c3419 RM |
357 | if (userns_fd) |
358 | *userns_fd = usernsfd; | |
359 | ||
878cd7e9 LP |
360 | if (root_fd) |
361 | *root_fd = rfd; | |
362 | ||
671c3419 | 363 | pidnsfd = mntnsfd = netnsfd = usernsfd = -1; |
bc9fd78c LP |
364 | |
365 | return 0; | |
366 | } | |
367 | ||
671c3419 RM |
368 | int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd) { |
369 | if (userns_fd >= 0) { | |
370 | /* Can't setns to your own userns, since then you could | |
371 | * escalate from non-root to root in your own namespace, so | |
372 | * check if namespaces equal before attempting to enter. */ | |
373 | _cleanup_free_ char *userns_fd_path = NULL; | |
374 | int r; | |
375 | if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0) | |
376 | return -ENOMEM; | |
377 | ||
e3f791a2 | 378 | r = files_same(userns_fd_path, "/proc/self/ns/user", 0); |
671c3419 RM |
379 | if (r < 0) |
380 | return r; | |
381 | if (r) | |
382 | userns_fd = -1; | |
383 | } | |
bc9fd78c | 384 | |
878cd7e9 LP |
385 | if (pidns_fd >= 0) |
386 | if (setns(pidns_fd, CLONE_NEWPID) < 0) | |
387 | return -errno; | |
a4475f57 | 388 | |
878cd7e9 LP |
389 | if (mntns_fd >= 0) |
390 | if (setns(mntns_fd, CLONE_NEWNS) < 0) | |
391 | return -errno; | |
bc9fd78c | 392 | |
878cd7e9 LP |
393 | if (netns_fd >= 0) |
394 | if (setns(netns_fd, CLONE_NEWNET) < 0) | |
395 | return -errno; | |
bc9fd78c | 396 | |
671c3419 RM |
397 | if (userns_fd >= 0) |
398 | if (setns(userns_fd, CLONE_NEWUSER) < 0) | |
399 | return -errno; | |
400 | ||
878cd7e9 LP |
401 | if (root_fd >= 0) { |
402 | if (fchdir(root_fd) < 0) | |
403 | return -errno; | |
404 | ||
405 | if (chroot(".") < 0) | |
406 | return -errno; | |
407 | } | |
bc9fd78c | 408 | |
b4da6d6b | 409 | return reset_uid_gid(); |
bc9fd78c | 410 | } |
bf108e55 | 411 | |
1c231f56 | 412 | uint64_t physical_memory(void) { |
d9ab2bcf LP |
413 | _cleanup_free_ char *root = NULL, *value = NULL; |
414 | uint64_t mem, lim; | |
415 | size_t ps; | |
416 | long sc; | |
1c231f56 | 417 | |
d9ab2bcf LP |
418 | /* We return this as uint64_t in case we are running as 32bit process on a 64bit kernel with huge amounts of |
419 | * memory. | |
420 | * | |
421 | * In order to support containers nicely that have a configured memory limit we'll take the minimum of the | |
422 | * physically reported amount of memory and the limit configured for the root cgroup, if there is any. */ | |
423 | ||
424 | sc = sysconf(_SC_PHYS_PAGES); | |
425 | assert(sc > 0); | |
426 | ||
427 | ps = page_size(); | |
428 | mem = (uint64_t) sc * (uint64_t) ps; | |
429 | ||
430 | if (cg_get_root_path(&root) < 0) | |
431 | return mem; | |
432 | ||
433 | if (cg_get_attribute("memory", root, "memory.limit_in_bytes", &value)) | |
434 | return mem; | |
435 | ||
436 | if (safe_atou64(value, &lim) < 0) | |
437 | return mem; | |
1c231f56 | 438 | |
d9ab2bcf LP |
439 | /* Make sure the limit is a multiple of our own page size */ |
440 | lim /= ps; | |
441 | lim *= ps; | |
1c231f56 | 442 | |
d9ab2bcf | 443 | return MIN(mem, lim); |
1c231f56 | 444 | } |
6db615c1 | 445 | |
d8cf2ac7 LP |
446 | uint64_t physical_memory_scale(uint64_t v, uint64_t max) { |
447 | uint64_t p, m, ps, r; | |
448 | ||
449 | assert(max > 0); | |
450 | ||
451 | /* Returns the physical memory size, multiplied by v divided by max. Returns UINT64_MAX on overflow. On success | |
452 | * the result is a multiple of the page size (rounds down). */ | |
453 | ||
454 | ps = page_size(); | |
455 | assert(ps > 0); | |
456 | ||
457 | p = physical_memory() / ps; | |
458 | assert(p > 0); | |
459 | ||
460 | m = p * v; | |
461 | if (m / p != v) | |
462 | return UINT64_MAX; | |
463 | ||
464 | m /= max; | |
465 | ||
466 | r = m * ps; | |
467 | if (r / ps != m) | |
468 | return UINT64_MAX; | |
469 | ||
470 | return r; | |
471 | } | |
472 | ||
83f8e808 LP |
473 | uint64_t system_tasks_max(void) { |
474 | ||
475 | #if SIZEOF_PID_T == 4 | |
476 | #define TASKS_MAX ((uint64_t) (INT32_MAX-1)) | |
477 | #elif SIZEOF_PID_T == 2 | |
478 | #define TASKS_MAX ((uint64_t) (INT16_MAX-1)) | |
479 | #else | |
480 | #error "Unknown pid_t size" | |
481 | #endif | |
482 | ||
483 | _cleanup_free_ char *value = NULL, *root = NULL; | |
484 | uint64_t a = TASKS_MAX, b = TASKS_MAX; | |
485 | ||
486 | /* Determine the maximum number of tasks that may run on this system. We check three sources to determine this | |
487 | * limit: | |
488 | * | |
489 | * a) the maximum value for the pid_t type | |
490 | * b) the cgroups pids_max attribute for the system | |
491 | * c) the kernel's configure maximum PID value | |
492 | * | |
493 | * And then pick the smallest of the three */ | |
494 | ||
495 | if (read_one_line_file("/proc/sys/kernel/pid_max", &value) >= 0) | |
496 | (void) safe_atou64(value, &a); | |
497 | ||
498 | if (cg_get_root_path(&root) >= 0) { | |
499 | value = mfree(value); | |
500 | ||
501 | if (cg_get_attribute("pids", root, "pids.max", &value) >= 0) | |
502 | (void) safe_atou64(value, &b); | |
503 | } | |
504 | ||
505 | return MIN3(TASKS_MAX, | |
506 | a <= 0 ? TASKS_MAX : a, | |
507 | b <= 0 ? TASKS_MAX : b); | |
508 | } | |
509 | ||
510 | uint64_t system_tasks_max_scale(uint64_t v, uint64_t max) { | |
511 | uint64_t t, m; | |
512 | ||
513 | assert(max > 0); | |
514 | ||
515 | /* Multiply the system's task value by the fraction v/max. Hence, if max==100 this calculates percentages | |
516 | * relative to the system's maximum number of tasks. Returns UINT64_MAX on overflow. */ | |
517 | ||
518 | t = system_tasks_max(); | |
519 | assert(t > 0); | |
520 | ||
521 | m = t * v; | |
522 | if (m / t != v) /* overflow? */ | |
523 | return UINT64_MAX; | |
524 | ||
525 | return m / max; | |
526 | } | |
527 | ||
27c06cb5 LP |
528 | int update_reboot_parameter_and_warn(const char *param) { |
529 | int r; | |
c5220a94 | 530 | |
27c06cb5 LP |
531 | if (isempty(param)) { |
532 | if (unlink("/run/systemd/reboot-param") < 0) { | |
533 | if (errno == ENOENT) | |
534 | return 0; | |
535 | ||
536 | return log_warning_errno(errno, "Failed to unlink reboot parameter file: %m"); | |
537 | } | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
78e334b5 | 542 | RUN_WITH_UMASK(0022) { |
27c06cb5 | 543 | r = write_string_file("/run/systemd/reboot-param", param, WRITE_STRING_FILE_CREATE); |
78e334b5 ZJS |
544 | if (r < 0) |
545 | return log_warning_errno(r, "Failed to write reboot parameter file: %m"); | |
546 | } | |
c5220a94 | 547 | |
e53fc357 | 548 | return 0; |
c5220a94 | 549 | } |
6d313367 | 550 | |
3f6fd1ba LP |
551 | int version(void) { |
552 | puts(PACKAGE_STRING "\n" | |
553 | SYSTEMD_FEATURES); | |
554 | return 0; | |
555 | } | |
68c58c67 LP |
556 | |
557 | /* This is a direct translation of str_verscmp from boot.c */ | |
558 | static bool is_digit(int c) { | |
559 | return c >= '0' && c <= '9'; | |
560 | } | |
561 | ||
562 | static int c_order(int c) { | |
563 | if (c == 0 || is_digit(c)) | |
564 | return 0; | |
565 | ||
566 | if ((c >= 'a') && (c <= 'z')) | |
567 | return c; | |
568 | ||
569 | return c + 0x10000; | |
570 | } | |
571 | ||
572 | int str_verscmp(const char *s1, const char *s2) { | |
573 | const char *os1, *os2; | |
574 | ||
575 | assert(s1); | |
576 | assert(s2); | |
577 | ||
578 | os1 = s1; | |
579 | os2 = s2; | |
580 | ||
581 | while (*s1 || *s2) { | |
582 | int first; | |
583 | ||
584 | while ((*s1 && !is_digit(*s1)) || (*s2 && !is_digit(*s2))) { | |
585 | int order; | |
586 | ||
587 | order = c_order(*s1) - c_order(*s2); | |
588 | if (order != 0) | |
589 | return order; | |
590 | s1++; | |
591 | s2++; | |
592 | } | |
593 | ||
594 | while (*s1 == '0') | |
595 | s1++; | |
596 | while (*s2 == '0') | |
597 | s2++; | |
598 | ||
599 | first = 0; | |
600 | while (is_digit(*s1) && is_digit(*s2)) { | |
601 | if (first == 0) | |
602 | first = *s1 - *s2; | |
603 | s1++; | |
604 | s2++; | |
605 | } | |
606 | ||
607 | if (is_digit(*s1)) | |
608 | return 1; | |
609 | if (is_digit(*s2)) | |
610 | return -1; | |
611 | ||
612 | if (first != 0) | |
613 | return first; | |
614 | } | |
615 | ||
616 | return strcmp(os1, os2); | |
617 | } |