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330345c2 MT |
1 | /* |
2 | * nash.c | |
3 | * | |
4 | * Simple code to load modules, mount root, and get things going. Uses | |
5 | * dietlibc to keep things small. | |
6 | * | |
7 | * Erik Troan (ewt@redhat.com) | |
8 | * Jeremy Katz (katzj@redhat.com) | |
9 | * Peter Jones (pjones@redhat.com) | |
10 | * | |
11 | * Copyright 2002-2005 Red Hat Software | |
12 | * | |
13 | * This software may be freely redistributed under the terms of the GNU | |
14 | * public license. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | * | |
20 | */ | |
21 | ||
22 | /* We internalize losetup, mount, raidautorun, and echo commands. Other | |
23 | commands are run from the filesystem. Comments and blank lines work as | |
24 | well, argument parsing is screwy. */ | |
25 | ||
26 | #include <ctype.h> | |
27 | #include <dirent.h> | |
28 | #include <errno.h> | |
29 | #include <fcntl.h> | |
30 | #include <net/if.h> | |
31 | #include <signal.h> | |
32 | #include <stdio.h> | |
33 | #include <stdlib.h> | |
34 | #include <string.h> | |
35 | #include <sys/ioctl.h> | |
36 | #include <sys/mount.h> | |
37 | #include <sys/socket.h> | |
38 | #include <sys/stat.h> | |
39 | #include <sys/time.h> | |
40 | #include <sys/types.h> | |
41 | #include <sys/un.h> | |
42 | #include <sys/wait.h> | |
43 | #include <unistd.h> | |
44 | #include <sys/ioctl.h> | |
45 | #include <sys/reboot.h> | |
46 | #include <termios.h> | |
47 | ||
48 | #include <asm/unistd.h> | |
49 | ||
50 | #include "mount_by_label.h" | |
51 | ||
52 | /* Need to tell loop.h what the actual dev_t type is. */ | |
53 | #undef dev_t | |
54 | #if defined(__alpha) || (defined(__sparc__) && defined(__arch64__)) | |
55 | #define dev_t unsigned int | |
56 | #else | |
57 | #define dev_t unsigned short | |
58 | #endif | |
59 | #include <linux/loop.h> | |
60 | #undef dev_t | |
61 | #define dev_t dev_t | |
62 | ||
63 | #define syslog klogctl | |
64 | ||
65 | #include <linux/cdrom.h> | |
66 | #define MD_MAJOR 9 | |
67 | #include <linux/raid/md_u.h> | |
68 | ||
69 | #ifndef RAID_AUTORUN | |
70 | #define RAID_AUTORUN _IO (MD_MAJOR, 0x14) | |
71 | #endif | |
72 | ||
73 | #ifndef MS_REMOUNT | |
74 | #define MS_REMOUNT 32 | |
75 | #endif | |
76 | ||
77 | #ifndef MS_BIND | |
78 | #define MS_BIND 4096 | |
79 | #endif | |
80 | ||
81 | #ifndef MS_MOVE | |
82 | #define MS_MOVE 8192 | |
83 | #endif | |
84 | ||
85 | #ifndef MNT_FORCE | |
86 | #define MNT_FORCE 0x1 | |
87 | #endif | |
88 | ||
89 | #ifndef MNT_DETACH | |
90 | #define MNT_DETACH 0x2 | |
91 | #endif | |
92 | ||
93 | extern dev_t name_to_dev_t(char *name); | |
94 | extern int display_uuid_cache(void); | |
95 | ||
96 | #define MAX(a, b) ((a) > (b) ? a : b) | |
97 | ||
98 | int testing = 0, quiet = 0, reallyquiet = 0; | |
99 | ||
100 | #define PATH "/usr/bin:/bin:/sbin:/usr/sbin" | |
101 | ||
102 | char * env[] = { | |
103 | "PATH=" PATH, | |
104 | "LVM_SUPPRESS_FD_WARNINGS=1", | |
105 | NULL | |
106 | }; | |
107 | ||
108 | int smartmknod(char * device, mode_t mode, dev_t dev) { | |
109 | char buf[256]; | |
110 | char * end; | |
111 | ||
112 | strncpy(buf, device, 256); | |
113 | ||
114 | end = buf; | |
115 | while (*end) { | |
116 | if (*end == '/') { | |
117 | *end = '\0'; | |
118 | if (access(buf, F_OK) && errno == ENOENT) | |
119 | mkdir(buf, 0755); | |
120 | *end = '/'; | |
121 | } | |
122 | ||
123 | end++; | |
124 | } | |
125 | ||
126 | return mknod(device, mode, dev); | |
127 | } | |
128 | ||
129 | char * getArg(char * cmd, char * end, char ** arg) { | |
130 | char quote = '\0'; | |
131 | ||
132 | if (!cmd || cmd >= end) return NULL; | |
133 | ||
134 | while (isspace(*cmd) && cmd < end) cmd++; | |
135 | if (cmd >= end) return NULL; | |
136 | ||
137 | if (*cmd == '"') | |
138 | cmd++, quote = '"'; | |
139 | else if (*cmd == '\'') | |
140 | cmd++, quote = '\''; | |
141 | ||
142 | if (quote) { | |
143 | *arg = cmd; | |
144 | ||
145 | /* This doesn't support \ escapes */ | |
146 | while (cmd < end && *cmd != quote) cmd++; | |
147 | ||
148 | if (cmd == end) { | |
149 | printf("error: quote mismatch for %s\n", *arg); | |
150 | return NULL; | |
151 | } | |
152 | ||
153 | *cmd = '\0'; | |
154 | cmd++; | |
155 | } else { | |
156 | *arg = cmd; | |
157 | while (!isspace(*cmd) && cmd < end) cmd++; | |
158 | *cmd = '\0'; | |
159 | if (**arg == '$') | |
160 | *arg = getenv(*arg+1); | |
161 | if (*arg == NULL) | |
162 | *arg = ""; | |
163 | } | |
164 | ||
165 | cmd++; | |
166 | ||
167 | while (isspace(*cmd)) cmd++; | |
168 | ||
169 | return cmd; | |
170 | } | |
171 | ||
172 | /* taken from anaconda/isys/probe.c */ | |
173 | static int readFD (int fd, char **buf) | |
174 | { | |
175 | char *p; | |
176 | size_t size = 4096; | |
177 | int s, filesize; | |
178 | ||
179 | *buf = malloc (size); | |
180 | if (*buf == 0) | |
181 | return -1; | |
182 | ||
183 | filesize = 0; | |
184 | do { | |
185 | p = &(*buf) [filesize]; | |
186 | s = read (fd, p, 4096); | |
187 | if (s < 0) | |
188 | break; | |
189 | filesize += s; | |
190 | if (s != 4096) | |
191 | break; | |
192 | size += 4096; | |
193 | *buf = realloc (*buf, size); | |
194 | } while (1); | |
195 | ||
196 | if (filesize == 0 && s < 0) { | |
197 | free (*buf); | |
198 | *buf = NULL; | |
199 | return -1; | |
200 | } | |
201 | ||
202 | return filesize; | |
203 | } | |
204 | ||
205 | #ifdef __powerpc__ | |
206 | #define CMDLINESIZE 256 | |
207 | #else | |
208 | #define CMDLINESIZE 1024 | |
209 | #endif | |
210 | ||
211 | /* get the contents of the kernel command line from /proc/cmdline */ | |
212 | static char * getKernelCmdLine(void) { | |
213 | int fd, i; | |
214 | char * buf; | |
215 | ||
216 | fd = open("/proc/cmdline", O_RDONLY, 0); | |
217 | if (fd < 0) { | |
218 | printf("getKernelCmdLine: failed to open /proc/cmdline: %d\n", errno); | |
219 | return NULL; | |
220 | } | |
221 | ||
222 | buf = malloc(CMDLINESIZE); | |
223 | if (!buf) | |
224 | return buf; | |
225 | ||
226 | i = read(fd, buf, CMDLINESIZE); | |
227 | if (i < 0) { | |
228 | printf("getKernelCmdLine: failed to read /proc/cmdline: %d\n", errno); | |
229 | close(fd); | |
230 | return NULL; | |
231 | } | |
232 | ||
233 | close(fd); | |
234 | if (i == 0) | |
235 | buf[0] = '\0'; | |
236 | else | |
237 | buf[i - 1] = '\0'; | |
238 | return buf; | |
239 | } | |
240 | ||
241 | /* get the start of a kernel arg "arg". returns everything after it | |
242 | * (useful for things like getting the args to init=). so if you only | |
243 | * want one arg, you need to terminate it at the n */ | |
244 | static char * getKernelArg(char * arg) { | |
245 | char * start, * cmdline; | |
246 | ||
247 | cmdline = start = getKernelCmdLine(); | |
248 | if (start == NULL) return NULL; | |
249 | while (*start) { | |
250 | if (isspace(*start)) { | |
251 | start++; | |
252 | continue; | |
253 | } | |
254 | if (strncmp(start, arg, strlen(arg)) == 0) { | |
255 | return start + strlen(arg); | |
256 | } | |
257 | while (*++start && !isspace(*start)) | |
258 | ; | |
259 | } | |
260 | ||
261 | return NULL; | |
262 | } | |
263 | ||
264 | int mountCommand(char * cmd, char * end) { | |
265 | char * fsType = NULL; | |
266 | char * device; | |
267 | char * mntPoint; | |
268 | char * deviceDir = NULL; | |
269 | char * options = NULL; | |
270 | int mustRemove = 0; | |
271 | int mustRemoveDir = 0; | |
272 | int rc = 0; | |
273 | int flags = MS_MGC_VAL; | |
274 | char * newOpts; | |
275 | ||
276 | cmd = getArg(cmd, end, &device); | |
277 | if (!cmd) { | |
278 | printf("usage: mount [--ro] [-o <opts>] -t <type> <device> <mntpoint>\n"); | |
279 | return 1; | |
280 | } | |
281 | ||
282 | while (cmd && *device == '-') { | |
283 | if (!strcmp(device, "--ro")) { | |
284 | flags |= MS_RDONLY; | |
285 | } else if (!strcmp(device, "--bind")) { | |
286 | flags = MS_BIND; | |
287 | fsType = "none"; | |
288 | } else if (!strcmp(device, "-o")) { | |
289 | cmd = getArg(cmd, end, &options); | |
290 | if (!cmd) { | |
291 | printf("mount: -o requires arguments\n"); | |
292 | return 1; | |
293 | } | |
294 | } else if (!strcmp(device, "-t")) { | |
295 | if (!(cmd = getArg(cmd, end, &fsType))) { | |
296 | printf("mount: missing filesystem type\n"); | |
297 | return 1; | |
298 | } | |
299 | } | |
300 | ||
301 | cmd = getArg(cmd, end, &device); | |
302 | } | |
303 | ||
304 | if (!cmd) { | |
305 | printf("mount: missing device\n"); | |
306 | return 1; | |
307 | } | |
308 | ||
309 | if (!(cmd = getArg(cmd, end, &mntPoint))) { | |
310 | printf("mount: missing mount point\n"); | |
311 | return 1; | |
312 | } | |
313 | ||
314 | if (!fsType) { | |
315 | printf("mount: filesystem type expected\n"); | |
316 | return 1; | |
317 | } | |
318 | ||
319 | if (cmd < end) { | |
320 | printf("mount: unexpected arguments\n"); | |
321 | return 1; | |
322 | } | |
323 | ||
324 | /* need to deal with options */ | |
325 | if (options) { | |
326 | char * end; | |
327 | char * start = options; | |
328 | ||
329 | newOpts = alloca(strlen(options) + 1); | |
330 | *newOpts = '\0'; | |
331 | ||
332 | while (*start) { | |
333 | end = strchr(start, ','); | |
334 | if (!end) { | |
335 | end = start + strlen(start); | |
336 | } else { | |
337 | *end = '\0'; | |
338 | end++; | |
339 | } | |
340 | ||
341 | if (!strcmp(start, "ro")) | |
342 | flags |= MS_RDONLY; | |
343 | else if (!strcmp(start, "rw")) | |
344 | flags &= ~MS_RDONLY; | |
345 | else if (!strcmp(start, "nosuid")) | |
346 | flags |= MS_NOSUID; | |
347 | else if (!strcmp(start, "suid")) | |
348 | flags &= ~MS_NOSUID; | |
349 | else if (!strcmp(start, "nodev")) | |
350 | flags |= MS_NODEV; | |
351 | else if (!strcmp(start, "dev")) | |
352 | flags &= ~MS_NODEV; | |
353 | else if (!strcmp(start, "noexec")) | |
354 | flags |= MS_NOEXEC; | |
355 | else if (!strcmp(start, "exec")) | |
356 | flags &= ~MS_NOEXEC; | |
357 | else if (!strcmp(start, "sync")) | |
358 | flags |= MS_SYNCHRONOUS; | |
359 | else if (!strcmp(start, "async")) | |
360 | flags &= ~MS_SYNCHRONOUS; | |
361 | else if (!strcmp(start, "nodiratime")) | |
362 | flags |= MS_NODIRATIME; | |
363 | else if (!strcmp(start, "diratime")) | |
364 | flags &= ~MS_NODIRATIME; | |
365 | else if (!strcmp(start, "noatime")) | |
366 | flags |= MS_NOATIME; | |
367 | else if (!strcmp(start, "atime")) | |
368 | flags &= ~MS_NOATIME; | |
369 | else if (!strcmp(start, "remount")) | |
370 | flags |= MS_REMOUNT; | |
371 | else if (!strcmp(start, "defaults")) | |
372 | ; | |
373 | else { | |
374 | if (*newOpts) | |
375 | strcat(newOpts, ","); | |
376 | strcat(newOpts, start); | |
377 | } | |
378 | ||
379 | start = end; | |
380 | } | |
381 | ||
382 | options = newOpts; | |
383 | } | |
384 | ||
385 | if (!strncmp("LABEL=", device, 6)) { | |
386 | int major, minor; | |
387 | char * devName; | |
388 | char * ptr; | |
389 | int i; | |
390 | ||
391 | devName = get_spec_by_volume_label(device + 6, &major, &minor); | |
392 | ||
393 | if (devName) { | |
394 | device = devName; | |
395 | if (access(device, F_OK)) { | |
396 | ptr = device; | |
397 | i = 0; | |
398 | while (*ptr) | |
399 | if (*ptr++ == '/') | |
400 | i++; | |
401 | if (i > 2) { | |
402 | deviceDir = alloca(strlen(device) + 1); | |
403 | strcpy(deviceDir, device); | |
404 | ptr = deviceDir + (strlen(device) - 1); | |
405 | while (*ptr != '/') | |
406 | *ptr-- = '\0'; | |
407 | if (mkdir(deviceDir, 0644)) { | |
408 | printf("mkdir: cannot create directory %s\n", deviceDir); | |
409 | } else { | |
410 | mustRemoveDir = 1; | |
411 | } | |
412 | } | |
413 | if (smartmknod(device, S_IFBLK | 0600, makedev(major, minor))) { | |
414 | printf("mount: cannot create device %s (%d,%d)\n", | |
415 | device, major, minor); | |
416 | return 1; | |
417 | } | |
418 | mustRemove = 1; | |
419 | } | |
420 | } | |
421 | } | |
422 | ||
423 | if (testing) { | |
424 | printf("mount %s%s%s-t '%s' '%s' '%s' (%s%s%s%s%s%s%s)\n", | |
425 | options ? "-o '" : "", | |
426 | options ? options : "", | |
427 | options ? "\' " : "", | |
428 | fsType, device, mntPoint, | |
429 | (flags & MS_RDONLY) ? "ro " : "", | |
430 | (flags & MS_NOSUID) ? "nosuid " : "", | |
431 | (flags & MS_NODEV) ? "nodev " : "", | |
432 | (flags & MS_NOEXEC) ? "noexec " : "", | |
433 | (flags & MS_SYNCHRONOUS) ? "sync " : "", | |
434 | (flags & MS_REMOUNT) ? "remount " : "", | |
435 | (flags & MS_NOATIME) ? "noatime " : "" | |
436 | ); | |
437 | } else { | |
438 | if (mount(device, mntPoint, fsType, flags, options)) { | |
439 | printf("mount: error %d mounting %s\n", errno, fsType); | |
440 | rc = 1; | |
441 | } | |
442 | } | |
443 | ||
444 | if (mustRemove) unlink(device); | |
445 | if (mustRemoveDir) rmdir(deviceDir); | |
446 | ||
447 | return rc; | |
448 | } | |
449 | ||
450 | int otherCommand(char * bin, char * cmd, char * end, int doFork) { | |
451 | char ** args; | |
452 | char ** nextArg; | |
453 | int pid, wpid; | |
454 | int status; | |
455 | char fullPath[255]; | |
456 | static const char * sysPath = PATH; | |
457 | const char * pathStart; | |
458 | const char * pathEnd; | |
459 | char * stdoutFile = NULL; | |
460 | int stdoutFd = 0; | |
461 | ||
462 | args = (char **)malloc(sizeof(char *) * 128); | |
463 | if (!args) | |
464 | return 1; | |
465 | nextArg = args; | |
466 | ||
467 | if (!strchr(bin, '/')) { | |
468 | pathStart = sysPath; | |
469 | while (*pathStart) { | |
470 | pathEnd = strchr(pathStart, ':'); | |
471 | ||
472 | if (!pathEnd) pathEnd = pathStart + strlen(pathStart); | |
473 | ||
474 | strncpy(fullPath, pathStart, pathEnd - pathStart); | |
475 | fullPath[pathEnd - pathStart] = '/'; | |
476 | strcpy(fullPath + (pathEnd - pathStart + 1), bin); | |
477 | ||
478 | pathStart = pathEnd; | |
479 | if (*pathStart) pathStart++; | |
480 | ||
481 | if (!access(fullPath, X_OK)) { | |
482 | bin = fullPath; | |
483 | break; | |
484 | } | |
485 | } | |
486 | } | |
487 | ||
488 | *nextArg = strdup(bin); | |
489 | ||
490 | while (cmd && cmd < end) { | |
491 | nextArg++; | |
492 | cmd = getArg(cmd, end, nextArg); | |
493 | } | |
494 | ||
495 | if (cmd) nextArg++; | |
496 | *nextArg = NULL; | |
497 | ||
498 | /* if the next-to-last arg is a >, redirect the output properly */ | |
499 | if (((nextArg - args) >= 2) && !strcmp(*(nextArg - 2), ">")) { | |
500 | stdoutFile = *(nextArg - 1); | |
501 | *(nextArg - 2) = NULL; | |
502 | ||
503 | stdoutFd = open(stdoutFile, O_CREAT | O_RDWR | O_TRUNC, 0600); | |
504 | if (stdoutFd < 0) { | |
505 | printf("nash: failed to open %s: %d\n", stdoutFile, errno); | |
506 | return 1; | |
507 | } | |
508 | } | |
509 | ||
510 | if (testing) { | |
511 | printf("%s ", bin); | |
512 | nextArg = args + 1; | |
513 | while (*nextArg) | |
514 | printf(" '%s'", *nextArg++); | |
515 | if (stdoutFile) | |
516 | printf(" (> %s)", stdoutFile); | |
517 | printf("\n"); | |
518 | } else { | |
519 | if (!doFork || !(pid = fork())) { | |
520 | /* child */ | |
521 | dup2(stdoutFd, 1); | |
522 | execve(args[0], args, env); | |
523 | printf("ERROR: failed in exec of %s\n", args[0]); | |
524 | return 1; | |
525 | } | |
526 | ||
527 | close(stdoutFd); | |
528 | ||
529 | for (;;) { | |
530 | wpid = wait4(-1, &status, 0, NULL); | |
531 | if (wpid == -1) { | |
532 | printf("ERROR: Failed to wait for process %d\n", wpid); | |
533 | } | |
534 | ||
535 | if (wpid != pid) | |
536 | continue; | |
537 | ||
538 | if (!WIFEXITED(status) || WEXITSTATUS(status)) { | |
539 | printf("ERROR: %s exited abnormally with value %d ! (pid %d)\n", args[0], WEXITSTATUS(status), pid); | |
540 | return 1; | |
541 | } | |
542 | break; | |
543 | } | |
544 | } | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | #ifdef DEBUG | |
550 | static int lsdir(char *thedir, char * prefix) { | |
551 | DIR * dir; | |
552 | struct dirent * entry; | |
553 | struct stat sb; | |
554 | char * fn; | |
555 | ||
556 | if (!(dir = opendir(thedir))) { | |
557 | printf("error opening %s: %d\n", thedir, errno); | |
558 | return 1; | |
559 | } | |
560 | ||
561 | fn = malloc(1024); | |
562 | while ((entry = readdir(dir))) { | |
563 | if (entry->d_name[0] == '.') | |
564 | continue; | |
565 | snprintf(fn, 1024, "%s/%s", thedir, entry->d_name); | |
566 | stat(fn, &sb); | |
567 | printf("%s%s", prefix, fn); | |
568 | ||
569 | if (S_ISDIR(sb.st_mode)) { | |
570 | char * pfx; | |
571 | pfx = malloc(strlen(prefix) + 3); | |
572 | sprintf(pfx, "%s ", prefix); | |
573 | printf("/\n"); | |
574 | } else if (S_ISCHR(sb.st_mode)) { | |
575 | printf(" c %d %d\n", major(sb.st_rdev), minor(sb.st_rdev)); | |
576 | } else if (S_ISBLK(sb.st_mode)) { | |
577 | printf(" b %d %d\n", major(sb.st_rdev), minor(sb.st_rdev)); | |
578 | } else if (S_ISLNK(sb.st_mode)) { | |
579 | char * target; | |
580 | target = malloc(1024); | |
581 | readlink(fn, target, 1024); | |
582 | printf("->%s\n", target); | |
583 | free(target); | |
584 | } else { | |
585 | printf("\n"); | |
586 | } | |
587 | } | |
588 | return 0; | |
589 | } | |
590 | ||
591 | int catCommand(char * cmd, char * end) { | |
592 | char * file; | |
593 | char * buf; | |
594 | int fd; | |
595 | ||
596 | if (!(cmd = getArg(cmd, end, &file))) { | |
597 | printf("cat: argument expected\n"); | |
598 | return 1; | |
599 | } | |
600 | ||
601 | if ((fd = open(file, O_RDONLY)) < 0) { | |
602 | printf("cat: error opening %s: %d\n", file, errno); | |
603 | return 1; | |
604 | } | |
605 | ||
606 | buf = malloc(1024); | |
607 | while (read(fd, buf, 1024) > 0) { | |
608 | write(1, buf, 1024); | |
609 | } | |
610 | return 0; | |
611 | } | |
612 | ||
613 | int lsCommand(char * cmd, char * end) { | |
614 | char * dir; | |
615 | ||
616 | if (!(cmd = getArg(cmd, end, &dir))) { | |
617 | printf("ls: argument expected\n"); | |
618 | return 1; | |
619 | } | |
620 | ||
621 | lsdir(dir, ""); | |
622 | return 0; | |
623 | } | |
624 | #endif | |
625 | ||
626 | int execCommand(char * cmd, char * end) { | |
627 | char * bin; | |
628 | ||
629 | if (!(cmd = getArg(cmd, end, &bin))) { | |
630 | printf("exec: argument expected\n"); | |
631 | return 1; | |
632 | } | |
633 | ||
634 | return otherCommand(bin, cmd, end, 0); | |
635 | } | |
636 | ||
637 | int losetupCommand(char * cmd, char * end) { | |
638 | char * device; | |
639 | char * file; | |
640 | int fd; | |
641 | struct loop_info loopInfo; | |
642 | int dev; | |
643 | ||
644 | if (!(cmd = getArg(cmd, end, &device))) { | |
645 | printf("losetup: missing device\n"); | |
646 | return 1; | |
647 | } | |
648 | ||
649 | if (!(cmd = getArg(cmd, end, &file))) { | |
650 | printf("losetup: missing file\n"); | |
651 | return 1; | |
652 | } | |
653 | ||
654 | if (cmd < end) { | |
655 | printf("losetup: unexpected arguments\n"); | |
656 | return 1; | |
657 | } | |
658 | ||
659 | if (testing) { | |
660 | printf("losetup '%s' '%s'\n", device, file); | |
661 | } else { | |
662 | dev = open(device, O_RDWR, 0); | |
663 | if (dev < 0) { | |
664 | printf("losetup: failed to open %s: %d\n", device, errno); | |
665 | return 1; | |
666 | } | |
667 | ||
668 | fd = open(file, O_RDWR, 0); | |
669 | if (fd < 0) { | |
670 | printf("losetup: failed to open %s: %d\n", file, errno); | |
671 | close(dev); | |
672 | return 1; | |
673 | } | |
674 | ||
675 | if (ioctl(dev, LOOP_SET_FD, (long) fd)) { | |
676 | printf("losetup: LOOP_SET_FD failed: %d\n", errno); | |
677 | close(dev); | |
678 | close(fd); | |
679 | return 1; | |
680 | } | |
681 | ||
682 | close(fd); | |
683 | ||
684 | memset(&loopInfo, 0, sizeof(loopInfo)); | |
685 | strcpy(loopInfo.lo_name, file); | |
686 | ||
687 | if (ioctl(dev, LOOP_SET_STATUS, &loopInfo)) | |
688 | printf("losetup: LOOP_SET_STATUS failed: %d\n", errno); | |
689 | ||
690 | close(dev); | |
691 | } | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
696 | #define RAID_MAJOR 9 | |
697 | int raidautorunCommand(char * cmd, char * end) { | |
698 | char * device; | |
699 | int fd; | |
700 | ||
701 | if (!(cmd = getArg(cmd, end, &device))) { | |
702 | printf("raidautorun: raid device expected as first argument\n"); | |
703 | return 1; | |
704 | } | |
705 | ||
706 | if (cmd < end) { | |
707 | printf("raidautorun: unexpected arguments\n"); | |
708 | return 1; | |
709 | } | |
710 | ||
711 | /* with udev, the raid devices don't exist until they get started. | |
712 | * this won't work so well with raidautorun. so, let's be smart | |
713 | * and create them ourselves if we need to */ | |
714 | if (access(device, R_OK & W_OK)) { | |
715 | int minor; | |
716 | if (sscanf(device, "/dev/md%d", &minor) != 1) { | |
717 | printf("raidautorun: unable to autocreate %s\n", device); | |
718 | return 1; | |
719 | } | |
720 | ||
721 | if (smartmknod(device, S_IFBLK | 0600, makedev(RAID_MAJOR, minor))) { | |
722 | printf("raidautorun: unable to autocreate %s\n", device); | |
723 | return 1; | |
724 | } | |
725 | } | |
726 | ||
727 | fd = open(device, O_RDWR, 0); | |
728 | if (fd < 0) { | |
729 | printf("raidautorun: failed to open %s: %d\n", device, errno); | |
730 | return 1; | |
731 | } | |
732 | ||
733 | if (ioctl(fd, RAID_AUTORUN, 0)) { | |
734 | printf("raidautorun: RAID_AUTORUN failed: %d\n", errno); | |
735 | close(fd); | |
736 | return 1; | |
737 | } | |
738 | ||
739 | close(fd); | |
740 | return 0; | |
741 | } | |
742 | ||
743 | #ifdef USE_DIET | |
744 | extern int pivot_root(char *, char *); | |
745 | #endif | |
746 | ||
747 | static int my_pivot_root(char * one, char * two) { | |
748 | #ifdef USE_DIET | |
749 | return pivot_root(one, two); | |
750 | #else | |
751 | return syscall(__NR_pivot_root, one, two); | |
752 | #endif | |
753 | } | |
754 | ||
755 | int pivotrootCommand(char * cmd, char * end) { | |
756 | char * new; | |
757 | char * old; | |
758 | ||
759 | if (!(cmd = getArg(cmd, end, &new))) { | |
760 | printf("pivotroot: new root mount point expected\n"); | |
761 | return 1; | |
762 | } | |
763 | ||
764 | if (!(cmd = getArg(cmd, end, &old))) { | |
765 | printf("pivotroot: old root mount point expected\n"); | |
766 | return 1; | |
767 | } | |
768 | ||
769 | if (cmd < end) { | |
770 | printf("pivotroot: unexpected arguments\n"); | |
771 | return 1; | |
772 | } | |
773 | ||
774 | if (my_pivot_root(new, old)) { | |
775 | printf("pivotroot: pivot_root(%s,%s) failed: %d\n", new, old, errno); | |
776 | return 1; | |
777 | } | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
782 | #define MAX_INIT_ARGS 32 | |
783 | /* 2.6 magic not-pivot-root but kind of similar stuff. | |
784 | * This is based on code from klibc/utils/run_init.c | |
785 | */ | |
786 | int switchrootCommand(char * cmd, char * end) { | |
787 | char * new; | |
788 | const char * initprogs[] = { "/sbin/init", "/etc/init", | |
789 | "/bin/init", "/bin/sh", NULL }; | |
790 | char * init, * cmdline = NULL; | |
791 | char ** initargs; | |
792 | /* Don't try to unmount the old "/", there's no way to do it. */ | |
793 | const char * umounts[] = { "/dev", "/proc", "/sys", NULL }; | |
794 | int fd, i = 0; | |
795 | int moveDev = 0; | |
796 | ||
797 | cmd = getArg(cmd, end, &new); | |
798 | if (cmd) { | |
799 | if (!strcmp(new, "--movedev")) | |
800 | moveDev = 1; | |
801 | cmd = getArg(cmd, end, &new); | |
802 | } | |
803 | ||
804 | if (!cmd) { | |
805 | printf("switchroot: new root mount point expected\n"); | |
806 | return 1; | |
807 | } | |
808 | ||
809 | if (chdir(new)) { | |
810 | printf("switchroot: chdir(%s) failed: %d\n", new, errno); | |
811 | return 1; | |
812 | } | |
813 | ||
814 | init = getKernelArg("init="); | |
815 | if (init == NULL) | |
816 | cmdline = getKernelCmdLine(); | |
817 | ||
818 | if (moveDev) { | |
819 | i = 1; | |
820 | mount("/dev", "./dev", NULL, MS_MOVE, NULL); | |
821 | } | |
822 | ||
823 | if ((fd = open("./dev/console", O_RDWR)) < 0) { | |
824 | printf("ERROR opening /dev/console!!!!: %d\n", errno); | |
825 | fd = 0; | |
826 | } | |
827 | ||
828 | if (dup2(fd, 0) != 0) printf("error dup2'ing fd of %d to 0\n", fd); | |
829 | if (dup2(fd, 1) != 1) printf("error dup2'ing fd of %d to 1\n", fd); | |
830 | if (dup2(fd, 2) != 2) printf("error dup2'ing fd of %d to 2\n", fd); | |
831 | if (fd > 2) | |
832 | close(fd); | |
833 | ||
834 | fd = open("/", O_RDONLY); | |
835 | for (; umounts[i] != NULL; i++) { | |
836 | if (!quiet) printf("unmounting old %s\n", umounts[i]); | |
837 | if (umount2(umounts[i], MNT_DETACH)) { | |
838 | printf("ERROR unmounting old %s: %d\n", umounts[i], errno); | |
839 | printf("forcing unmount of %s\n", umounts[i]); | |
840 | umount2(umounts[i], MNT_FORCE); | |
841 | } | |
842 | } | |
843 | i=0; | |
844 | ||
845 | if (mount(".", "/", NULL, MS_MOVE, NULL)) { | |
846 | printf("switchroot: mount failed: %d\n", errno); | |
847 | close(fd); | |
848 | return 1; | |
849 | } | |
850 | ||
851 | if (chroot(".") || chdir("/")) { | |
852 | printf("switchroot: chroot() failed: %d\n", errno); | |
853 | close(fd); | |
854 | return 1; | |
855 | } | |
856 | ||
857 | /* release the old "/" */ | |
858 | close(fd); | |
859 | ||
860 | if (init == NULL) { | |
861 | int j; | |
862 | for (j = 0; initprogs[j] != NULL; j++) { | |
863 | if (!access(initprogs[j], X_OK)) { | |
864 | init = strdup(initprogs[j]); | |
865 | break; | |
866 | } | |
867 | } | |
868 | } | |
869 | ||
870 | initargs = (char **)malloc(sizeof(char *)*(MAX_INIT_ARGS+1)); | |
871 | if (cmdline && init) { | |
872 | initargs[i++] = strdup(init); | |
873 | } else { | |
874 | cmdline = init; | |
875 | initargs[0] = NULL; | |
876 | } | |
877 | ||
878 | if (cmdline != NULL) { | |
879 | char * chptr, * start; | |
880 | ||
881 | start = chptr = cmdline; | |
882 | for (; (i < MAX_INIT_ARGS) && (*start != '\0'); i++) { | |
883 | while (*chptr && !isspace(*chptr)) chptr++; | |
884 | if (*chptr != '\0') *(chptr++) = '\0'; | |
885 | initargs[i] = strdup(start); | |
886 | start = chptr; | |
887 | } | |
888 | } | |
889 | ||
890 | initargs[i] = NULL; | |
891 | ||
892 | if (access(initargs[0], X_OK)) { | |
893 | printf("WARNING: can't access %s\n", initargs[0]); | |
894 | } | |
895 | execv(initargs[0], initargs); | |
896 | printf("exec of init (%s) failed!!!: %d\n", initargs[0], errno); | |
897 | return 1; | |
898 | } | |
899 | ||
900 | int isEchoQuiet(int fd) { | |
901 | if (!reallyquiet) return 0; | |
902 | if (fd != 1) return 0; | |
903 | return 1; | |
904 | } | |
905 | ||
906 | int echoCommand(char * cmd, char * end) { | |
907 | char * args[256]; | |
908 | char ** nextArg = args; | |
909 | int outFd = 1; | |
910 | int num = 0; | |
911 | int i; | |
912 | int newline = 1; | |
913 | int length = 0; | |
914 | char *string; | |
915 | ||
916 | if (testing && !quiet) { | |
917 | printf("(echo) "); | |
918 | fflush(stdout); | |
919 | } | |
920 | ||
921 | while ((cmd = getArg(cmd, end, nextArg))) { | |
922 | if (!strncmp("-n", *nextArg, MAX(2, strlen(*nextArg)))) { | |
923 | newline = 0; | |
924 | } else { | |
925 | length += strlen(*nextArg); | |
926 | nextArg++, num++; | |
927 | } | |
928 | } | |
929 | length += num + 1; | |
930 | ||
931 | if ((nextArg - args >= 2) && !strcmp(*(nextArg - 2), ">")) { | |
932 | outFd = open(*(nextArg - 1), O_WRONLY | O_CREAT | O_TRUNC, 0644); | |
933 | if (outFd < 0) { | |
934 | printf("echo: cannot open %s for write: %d\n", | |
935 | *(nextArg - 1), errno); | |
936 | return 1; | |
937 | } | |
938 | ||
939 | newline = 0; | |
940 | num -= 2; | |
941 | } | |
942 | string = (char *)malloc(length * sizeof(char)); | |
943 | *string = '\0'; | |
944 | for (i = 0; i < num;i ++) { | |
945 | if (i) strcat(string, " "); | |
946 | strncat(string, args[i], strlen(args[i])); | |
947 | } | |
948 | ||
949 | if (newline) strcat(string, "\n"); | |
950 | if (!isEchoQuiet(outFd)) write(outFd, string, strlen(string)); | |
951 | ||
952 | if (outFd != 1) close(outFd); | |
953 | free(string); | |
954 | ||
955 | return 0; | |
956 | } | |
957 | ||
958 | int umountCommand(char * cmd, char * end) { | |
959 | char * path; | |
960 | ||
961 | if (!(cmd = getArg(cmd, end, &path))) { | |
962 | printf("umount: path expected\n"); | |
963 | return 1; | |
964 | } | |
965 | ||
966 | if (cmd < end) { | |
967 | printf("umount: unexpected arguments\n"); | |
968 | return 1; | |
969 | } | |
970 | ||
971 | if (umount(path)) { | |
972 | printf("umount %s failed: %d\n", path, errno); | |
973 | return 1; | |
974 | } | |
975 | ||
976 | return 0; | |
977 | } | |
978 | ||
979 | int mkrootdevCommand(char * cmd, char * end) { | |
980 | char * path; | |
981 | char *root, * chptr; | |
982 | int devNum = 0; | |
983 | int fd; | |
984 | int i; | |
985 | char buf[1024]; | |
986 | int major, minor; | |
987 | ||
988 | if (!(cmd = getArg(cmd, end, &path))) { | |
989 | printf("mkrootdev: path expected\n"); | |
990 | return 1; | |
991 | } | |
992 | ||
993 | if (cmd < end) { | |
994 | printf("mkrootdev: unexpected arguments\n"); | |
995 | return 1; | |
996 | } | |
997 | ||
998 | root = getKernelArg("root="); | |
999 | ||
1000 | if (root) { | |
1001 | chptr = root; | |
1002 | while (*chptr && !isspace(*chptr)) chptr++; | |
1003 | *chptr = '\0'; | |
1004 | } | |
1005 | ||
1006 | if (root && !access(root, R_OK)) { | |
1007 | if (!symlink(root, "/dev/root")) | |
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | if (root && !strncmp(root, "LABEL=", 6)) { | |
1012 | if (get_spec_by_volume_label(root + 6, &major, &minor)) { | |
1013 | if (smartmknod(path, S_IFBLK | 0600, makedev(major, minor))) { | |
1014 | printf("mount: cannot create device %s (%d,%d)\n", | |
1015 | path, major, minor); | |
1016 | return 1; | |
1017 | } | |
1018 | ||
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | printf("mkrootdev: label %s not found\n", root + 6); | |
1023 | ||
1024 | return 1; | |
1025 | } | |
1026 | ||
1027 | if (root && !strncmp(root, "UUID=", 5)) { | |
1028 | if (get_spec_by_uuid(root+5, &major, &minor)) { | |
1029 | if (smartmknod(path, S_IFBLK | 0600, makedev(major, minor))) { | |
1030 | printf("mount: cannot create device %s (%d,%d)\n", | |
1031 | path, major, minor); | |
1032 | return 1; | |
1033 | } | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | printf("mkrootdev: UUID %s not found\n", root+5); | |
1039 | ||
1040 | return 1; | |
1041 | } | |
1042 | ||
1043 | fd = open("/proc/sys/kernel/real-root-dev", O_RDONLY, 0); | |
1044 | if (fd < 0) { | |
1045 | printf("mkrootdev: failed to open /proc/sys/kernel/real-root-dev: %d\n", errno); | |
1046 | return 1; | |
1047 | } | |
1048 | ||
1049 | i = read(fd, buf, sizeof(buf)); | |
1050 | if (i < 0) { | |
1051 | printf("mkrootdev: failed to read real-root-dev: %d\n", errno); | |
1052 | close(fd); | |
1053 | return 1; | |
1054 | } | |
1055 | ||
1056 | close(fd); | |
1057 | if (i == 0) | |
1058 | buf[i] = '\0'; | |
1059 | else | |
1060 | buf[i - 1] = '\0'; | |
1061 | ||
1062 | devNum = atoi(buf); | |
1063 | if (devNum < 0) { | |
1064 | printf("mkrootdev: bad device %s\n", buf); | |
1065 | return 1; | |
1066 | } | |
1067 | ||
1068 | if (!devNum && root) | |
1069 | devNum = name_to_dev_t(root); | |
1070 | ||
1071 | if (smartmknod(path, S_IFBLK | 0700, devNum)) { | |
1072 | printf("mkrootdev: mknod failed: %d\n", errno); | |
1073 | return 1; | |
1074 | } | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | int mkdirCommand(char * cmd, char * end) { | |
1080 | char * dir; | |
1081 | int ignoreExists = 0; | |
1082 | ||
1083 | cmd = getArg(cmd, end, &dir); | |
1084 | ||
1085 | if (cmd && !strcmp(dir, "-p")) { | |
1086 | ignoreExists = 1; | |
1087 | cmd = getArg(cmd, end, &dir); | |
1088 | } | |
1089 | ||
1090 | if (!cmd) { | |
1091 | printf("mkdir: directory expected\n"); | |
1092 | return 1; | |
1093 | } | |
1094 | ||
1095 | if (mkdir(dir, 0755)) { | |
1096 | if (!ignoreExists && errno == EEXIST) { | |
1097 | printf("mkdir: failed to create %s: %d\n", dir, errno); | |
1098 | return 1; | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | int accessCommand(char * cmd, char * end) { | |
1106 | char * permStr; | |
1107 | int perms = 0; | |
1108 | char * file = NULL; | |
1109 | ||
1110 | cmd = getArg(cmd, end, &permStr); | |
1111 | if (cmd) cmd = getArg(cmd, end, &file); | |
1112 | ||
1113 | if (!cmd || *permStr != '-') { | |
1114 | printf("usage: access -[perm] file\n"); | |
1115 | return 1; | |
1116 | } | |
1117 | ||
1118 | permStr++; | |
1119 | while (*permStr) { | |
1120 | switch (*permStr) { | |
1121 | case 'r': perms |= R_OK; break; | |
1122 | case 'w': perms |= W_OK; break; | |
1123 | case 'x': perms |= X_OK; break; | |
1124 | case 'f': perms |= F_OK; break; | |
1125 | default: | |
1126 | printf("perms must be -[r][w][x][f]\n"); | |
1127 | return 1; | |
1128 | } | |
1129 | ||
1130 | permStr++; | |
1131 | } | |
1132 | ||
1133 | if ((file == NULL) || (access(file, perms))) | |
1134 | return 1; | |
1135 | ||
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | int sleepCommand(char * cmd, char * end) { | |
1140 | char *delaystr; | |
1141 | int delay; | |
1142 | ||
1143 | if (!(cmd = getArg(cmd, end, &delaystr))) { | |
1144 | printf("sleep: delay expected\n"); | |
1145 | return 1; | |
1146 | } | |
1147 | ||
1148 | delay = atoi(delaystr); | |
1149 | sleep(delay); | |
1150 | ||
1151 | return 0; | |
1152 | } | |
1153 | ||
1154 | int readlinkCommand(char * cmd, char * end) { | |
1155 | char * path; | |
1156 | char * buf, * respath, * fullpath; | |
1157 | struct stat sb; | |
1158 | int rc = 0; | |
1159 | ||
1160 | if (!(cmd = getArg(cmd, end, &path))) { | |
1161 | printf("readlink: file expected\n"); | |
1162 | return 1; | |
1163 | } | |
1164 | ||
1165 | if (lstat(path, &sb) == -1) { | |
1166 | fprintf(stderr, "unable to stat %s: %d\n", path, errno); | |
1167 | return 1; | |
1168 | } | |
1169 | ||
1170 | if (!S_ISLNK(sb.st_mode)) { | |
1171 | printf("%s\n", path); | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | buf = malloc(512); | |
1176 | if (readlink(path, buf, 512) == -1) { | |
1177 | fprintf(stderr, "error readlink %s: %d\n", path, errno); | |
1178 | free(buf); | |
1179 | return 1; | |
1180 | } | |
1181 | ||
1182 | /* symlink is absolute */ | |
1183 | if (buf[0] == '/') { | |
1184 | printf("%s\n", buf); | |
1185 | free(buf); | |
1186 | return 0; | |
1187 | } | |
1188 | ||
1189 | /* nope, need to handle the relative symlink case too */ | |
1190 | respath = strrchr(path, '/'); | |
1191 | if (respath) { | |
1192 | *respath = '\0'; | |
1193 | } | |
1194 | ||
1195 | fullpath = malloc(512); | |
1196 | /* and normalize it */ | |
1197 | snprintf(fullpath, 512, "%s/%s", path, buf); | |
1198 | respath = malloc(PATH_MAX); | |
1199 | if (!(respath = realpath(fullpath, respath))) { | |
1200 | fprintf(stderr, "error realpath %s: %d\n", fullpath, errno); | |
1201 | rc = 1; | |
1202 | goto readlinkout; | |
1203 | } | |
1204 | ||
1205 | printf("%s\n", respath); | |
1206 | readlinkout: | |
1207 | free(buf); | |
1208 | free(respath); | |
1209 | free(fullpath); | |
1210 | return rc; | |
1211 | } | |
1212 | ||
1213 | int doFind(char * dirName, char * name) { | |
1214 | struct stat sb; | |
1215 | DIR * dir; | |
1216 | struct dirent * d; | |
1217 | char * strBuf = alloca(strlen(dirName) + 1024); | |
1218 | ||
1219 | if (!(dir = opendir(dirName))) { | |
1220 | fprintf(stderr, "error opening %s: %d\n", dirName, errno); | |
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | errno = 0; | |
1225 | while ((d = readdir(dir))) { | |
1226 | errno = 0; | |
1227 | ||
1228 | strcpy(strBuf, dirName); | |
1229 | strcat(strBuf, "/"); | |
1230 | strcat(strBuf, d->d_name); | |
1231 | ||
1232 | if (!strcmp(d->d_name, name)) | |
1233 | printf("%s\n", strBuf); | |
1234 | ||
1235 | if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) { | |
1236 | errno = 0; | |
1237 | continue; | |
1238 | } | |
1239 | ||
1240 | if (lstat(strBuf, &sb)) { | |
1241 | fprintf(stderr, "failed to stat %s: %d\n", strBuf, errno); | |
1242 | errno = 0; | |
1243 | continue; | |
1244 | } | |
1245 | ||
1246 | if (S_ISDIR(sb.st_mode)) | |
1247 | doFind(strBuf, name); | |
1248 | } | |
1249 | ||
1250 | if (errno) { | |
1251 | closedir(dir); | |
1252 | printf("error reading from %s: %d\n", dirName, errno); | |
1253 | return 1; | |
1254 | } | |
1255 | ||
1256 | closedir(dir); | |
1257 | ||
1258 | return 0; | |
1259 | } | |
1260 | ||
1261 | int findCommand(char * cmd, char * end) { | |
1262 | char * dir; | |
1263 | char * name; | |
1264 | ||
1265 | cmd = getArg(cmd, end, &dir); | |
1266 | if (cmd) cmd = getArg(cmd, end, &name); | |
1267 | if (cmd && strcmp(name, "-name")) { | |
1268 | printf("usage: find [path] -name [file]\n"); | |
1269 | return 1; | |
1270 | } | |
1271 | ||
1272 | if (cmd) cmd = getArg(cmd, end, &name); | |
1273 | if (!cmd) { | |
1274 | printf("usage: find [path] -name [file]\n"); | |
1275 | return 1; | |
1276 | } | |
1277 | ||
1278 | return doFind(dir, name); | |
1279 | } | |
1280 | ||
1281 | int findlodevCommand(char * cmd, char * end) { | |
1282 | char devName[20]; | |
1283 | int devNum; | |
1284 | int fd; | |
1285 | struct loop_info loopInfo; | |
1286 | char separator[2] = ""; | |
1287 | ||
1288 | if (*end != '\n') { | |
1289 | printf("usage: findlodev\n"); | |
1290 | return 1; | |
1291 | } | |
1292 | ||
1293 | if (!access("/dev/.devfsd", X_OK)) | |
1294 | strcpy(separator, "/"); | |
1295 | ||
1296 | for (devNum = 0; devNum < 256; devNum++) { | |
1297 | sprintf(devName, "/dev/loop%s%d", separator, devNum); | |
1298 | if ((fd = open(devName, O_RDONLY)) < 0) return 0; | |
1299 | ||
1300 | if (ioctl(fd, LOOP_GET_STATUS, &loopInfo)) { | |
1301 | close(fd); | |
1302 | printf("%s\n", devName); | |
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | close(fd); | |
1307 | } | |
1308 | ||
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | int mknodCommand(char * cmd, char * end) { | |
1313 | char * path, * type; | |
1314 | char * majorStr, * minorStr; | |
1315 | int major; | |
1316 | int minor; | |
1317 | char * chptr; | |
1318 | mode_t mode; | |
1319 | ||
1320 | cmd = getArg(cmd, end, &path); | |
1321 | cmd = getArg(cmd, end, &type); | |
1322 | cmd = getArg(cmd, end, &majorStr); | |
1323 | cmd = getArg(cmd, end, &minorStr); | |
1324 | if (!minorStr) { | |
1325 | printf("mknod: usage mknod <path> [c|b] <major> <minor>\n"); | |
1326 | return 1; | |
1327 | } | |
1328 | ||
1329 | if (!strcmp(type, "b")) { | |
1330 | mode = S_IFBLK; | |
1331 | } else if (!strcmp(type, "c")) { | |
1332 | mode = S_IFCHR; | |
1333 | } else { | |
1334 | printf("mknod: invalid type\n"); | |
1335 | return 1; | |
1336 | } | |
1337 | ||
1338 | major = strtol(majorStr, &chptr, 10); | |
1339 | if (*chptr) { | |
1340 | printf("invalid major number\n"); | |
1341 | return 1; | |
1342 | } | |
1343 | ||
1344 | minor = strtol(minorStr, &chptr, 10); | |
1345 | if (*chptr) { | |
1346 | printf("invalid minor number\n"); | |
1347 | return 1; | |
1348 | } | |
1349 | ||
1350 | if (smartmknod(path, mode | 0600, makedev(major, minor))) { | |
1351 | printf("mknod: failed to create %s: %d\n", path, errno); | |
1352 | return 1; | |
1353 | } | |
1354 | ||
1355 | return 0; | |
1356 | } | |
1357 | ||
1358 | int mkdevicesCommand(char * cmd, char * end) { | |
1359 | int fd; | |
1360 | char *buf; | |
1361 | int i; | |
1362 | char * start, * chptr; | |
1363 | int major, minor; | |
1364 | char old; | |
1365 | char devName[128]; | |
1366 | char * prefix; | |
1367 | ||
1368 | if (!(cmd = getArg(cmd, end, &prefix))) { | |
1369 | printf("mkdevices: path expected\n"); | |
1370 | return 1; | |
1371 | } | |
1372 | ||
1373 | if (cmd < end) { | |
1374 | printf("mkdevices: unexpected arguments\n"); | |
1375 | return 1; | |
1376 | } | |
1377 | ||
1378 | if ((fd = open("/proc/partitions", O_RDONLY)) < 0) { | |
1379 | printf("mkrootdev: failed to open /proc/partitions: %d\n", errno); | |
1380 | return 1; | |
1381 | } | |
1382 | ||
1383 | i = readFD(fd, &buf); | |
1384 | if (i < 1) { | |
1385 | close(fd); | |
1386 | printf("failed to read /proc/partitions: %d\n", errno); | |
1387 | return 1; | |
1388 | } | |
1389 | buf[i] = '\0'; | |
1390 | close(fd); | |
1391 | ||
1392 | start = strchr(buf, '\n'); | |
1393 | if (start) { | |
1394 | start++; | |
1395 | start = strchr(buf, '\n'); | |
1396 | } | |
1397 | if (!start) return 1; | |
1398 | ||
1399 | start = start + 1; | |
1400 | while (*start) { | |
1401 | while (*start && isspace(*start)) start++; | |
1402 | major = strtol(start, &chptr, 10); | |
1403 | ||
1404 | if (start != chptr) { | |
1405 | start = chptr; | |
1406 | while (*start && isspace(*start)) start++; | |
1407 | minor = strtol(start, &chptr, 10); | |
1408 | ||
1409 | if (start != chptr) { | |
1410 | start = chptr; | |
1411 | while (*start && isspace(*start)) start++; | |
1412 | while (*start && !isspace(*start)) start++; | |
1413 | while (*start && isspace(*start)) start++; | |
1414 | ||
1415 | if (*start) { | |
1416 | ||
1417 | chptr = start; | |
1418 | while (!isspace(*chptr)) chptr++; | |
1419 | old = *chptr; | |
1420 | *chptr = '\0'; | |
1421 | ||
1422 | if (testing) { | |
1423 | printf("% 3d % 3d %s\n", major, minor, start); | |
1424 | } else { | |
1425 | char * ptr, * deviceDir; | |
1426 | int i; | |
1427 | ||
1428 | sprintf(devName, "%s/%s", prefix, start); | |
1429 | unlink(devName); | |
1430 | ||
1431 | ptr = devName; | |
1432 | i = 0; | |
1433 | while (*ptr) | |
1434 | if (*ptr++ == '/') | |
1435 | i++; | |
1436 | if (i > 2) { | |
1437 | deviceDir = alloca(strlen(devName) + 1); | |
1438 | strcpy(deviceDir, devName); | |
1439 | ptr = deviceDir + (strlen(devName) - 1); | |
1440 | while (*ptr != '/') | |
1441 | *ptr-- = '\0'; | |
1442 | if (access(deviceDir, X_OK) && mkdir(deviceDir, 0644)) { | |
1443 | printf("mkdir: cannot create directory %s: %d\n", deviceDir, errno); | |
1444 | } | |
1445 | } | |
1446 | if (smartmknod(devName, S_IFBLK | 0600, | |
1447 | makedev(major, minor))) { | |
1448 | printf("failed to create %s\n", devName); | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | *chptr = old; | |
1453 | start = chptr; | |
1454 | } | |
1455 | ||
1456 | } | |
1457 | } | |
1458 | ||
1459 | start = strchr(start, '\n'); | |
1460 | if (!*start) return 1; | |
1461 | start = start + 1; | |
1462 | } | |
1463 | ||
1464 | return 0; | |
1465 | } | |
1466 | ||
1467 | static int getDevNumFromProc(char * file, char * device) { | |
1468 | char buf[32768], line[4096]; | |
1469 | char * start, *end; | |
1470 | int num; | |
1471 | int fd; | |
1472 | ||
1473 | if ((fd = open(file, O_RDONLY)) == -1) { | |
1474 | printf("can't open file %s: %d\n", file, errno); | |
1475 | return -1; | |
1476 | } | |
1477 | ||
1478 | num = read(fd, buf, sizeof(buf)); | |
1479 | if (num < 1) { | |
1480 | close(fd); | |
1481 | printf("failed to read %s: %d\n", file, errno); | |
1482 | return -1; | |
1483 | } | |
1484 | buf[num] = '\0'; | |
1485 | close(fd); | |
1486 | ||
1487 | start = buf; | |
1488 | end = strchr(start, '\n'); | |
1489 | while (start && end) { | |
1490 | *end++ = '\0'; | |
1491 | if ((sscanf(start, "%d %s", &num, line)) == 2) { | |
1492 | if (!strncmp(device, line, strlen(device))) | |
1493 | return num; | |
1494 | } | |
1495 | start = end; | |
1496 | end = strchr(start, '\n'); | |
1497 | } | |
1498 | return -1; | |
1499 | } | |
1500 | ||
1501 | int mkDMNodCommand(char * cmd, char * end) { | |
1502 | int major = getDevNumFromProc("/proc/devices", "misc"); | |
1503 | int minor = getDevNumFromProc("/proc/misc", "device-mapper"); | |
1504 | ||
1505 | if ((major == -1) || (minor == -1)) { | |
1506 | printf("Unable to find device-mapper major/minor\n"); | |
1507 | return 1; | |
1508 | } | |
1509 | ||
1510 | if (!access("/dev/mapper/control", R_OK)) { | |
1511 | struct stat sb; | |
1512 | if (stat("/dev/mapper/control", &sb) == 0) { | |
1513 | if (S_ISCHR(sb.st_mode) && (sb.st_rdev == makedev(major, minor))) | |
1514 | return 0; | |
1515 | } | |
1516 | ||
1517 | unlink("/dev/mapper/control"); | |
1518 | } | |
1519 | ||
1520 | if (smartmknod("/dev/mapper/control", S_IFCHR | 0600, | |
1521 | makedev(major, minor))) { | |
1522 | printf("failed to create /dev/mapper/control\n"); | |
1523 | return 1; | |
1524 | } | |
1525 | ||
1526 | return 0; | |
1527 | } | |
1528 | ||
1529 | int setQuietCommand(char * cmd, char * end) { | |
1530 | int fd, rc; | |
1531 | ||
1532 | if ((fd = open("/proc/cmdline", O_RDONLY)) >= 0) { | |
1533 | char * buf = malloc(512); | |
1534 | rc = read(fd, buf, 511); | |
1535 | if (strstr(buf, "quiet") != NULL) | |
1536 | reallyquiet = 1; | |
1537 | close(fd); | |
1538 | free(buf); | |
1539 | } | |
1540 | ||
1541 | if (reallyquiet) | |
1542 | quiet = 1; | |
1543 | ||
1544 | return 0; | |
1545 | } | |
1546 | ||
1547 | int runStartup(int fd) { | |
1548 | char contents[32768]; | |
1549 | int i; | |
1550 | char * start, * end; | |
1551 | char * chptr; | |
1552 | int rc; | |
1553 | ||
1554 | i = read(fd, contents, sizeof(contents) - 1); | |
1555 | if (i == (sizeof(contents) - 1)) { | |
1556 | printf("Failed to read /startup.rc -- file too large.\n"); | |
1557 | return 1; | |
1558 | } | |
1559 | close(fd); | |
1560 | ||
1561 | contents[i] = '\0'; | |
1562 | ||
1563 | start = contents; | |
1564 | while (*start) { | |
1565 | while (isspace(*start) && *start && (*start != '\n')) start++; | |
1566 | ||
1567 | if (*start == '#') | |
1568 | while (*start && (*start != '\n')) start++; | |
1569 | ||
1570 | if (*start == '\n') { | |
1571 | start++; | |
1572 | continue; | |
1573 | } | |
1574 | ||
1575 | if (!*start) { | |
1576 | printf("(last line in /startup.rc is empty)\n"); | |
1577 | continue; | |
1578 | } | |
1579 | ||
1580 | /* start points to the beginning of the command */ | |
1581 | end = start + 1; | |
1582 | while (*end && (*end != '\n')) end++; | |
1583 | if (!*end) { | |
1584 | printf("(last line in /startup.rc missing \\n -- skipping)\n"); | |
1585 | start = end; | |
1586 | continue; | |
1587 | } | |
1588 | ||
1589 | /* end points to the \n at the end of the command */ | |
1590 | ||
1591 | chptr = start; | |
1592 | while (chptr < end && !isspace(*chptr)) chptr++; | |
1593 | ||
1594 | if (!strncmp(start, "mount", MAX(5, chptr - start))) | |
1595 | rc = mountCommand(chptr, end); | |
1596 | else if (!strncmp(start, "losetup", MAX(7, chptr - start))) | |
1597 | rc = losetupCommand(chptr, end); | |
1598 | else if (!strncmp(start, "echo", MAX(4, chptr - start))) | |
1599 | rc = echoCommand(chptr, end); | |
1600 | else if (!strncmp(start, "raidautorun", MAX(11, chptr - start))) | |
1601 | rc = raidautorunCommand(chptr, end); | |
1602 | else if (!strncmp(start, "pivot_root", MAX(10, chptr - start))) | |
1603 | rc = pivotrootCommand(chptr, end); | |
1604 | else if (!strncmp(start, "switchroot", MAX(10, chptr - start))) | |
1605 | rc = switchrootCommand(chptr, end); | |
1606 | else if (!strncmp(start, "mkrootdev", MAX(9, chptr - start))) | |
1607 | rc = mkrootdevCommand(chptr, end); | |
1608 | else if (!strncmp(start, "umount", MAX(6, chptr - start))) | |
1609 | rc = umountCommand(chptr, end); | |
1610 | else if (!strncmp(start, "exec", MAX(4, chptr - start))) | |
1611 | rc = execCommand(chptr, end); | |
1612 | else if (!strncmp(start, "mkdir", MAX(5, chptr - start))) | |
1613 | rc = mkdirCommand(chptr, end); | |
1614 | else if (!strncmp(start, "access", MAX(6, chptr - start))) | |
1615 | rc = accessCommand(chptr, end); | |
1616 | else if (!strncmp(start, "find", MAX(4, chptr - start))) | |
1617 | rc = findCommand(chptr, end); | |
1618 | else if (!strncmp(start, "findlodev", MAX(7, chptr - start))) | |
1619 | rc = findlodevCommand(chptr, end); | |
1620 | else if (!strncmp(start, "showlabels", MAX(10, chptr-start))) | |
1621 | rc = display_uuid_cache(); | |
1622 | else if (!strncmp(start, "mkdevices", MAX(9, chptr-start))) | |
1623 | rc = mkdevicesCommand(chptr, end); | |
1624 | else if (!strncmp(start, "sleep", MAX(5, chptr-start))) | |
1625 | rc = sleepCommand(chptr, end); | |
1626 | else if (!strncmp(start, "mknod", MAX(5, chptr-start))) | |
1627 | rc = mknodCommand(chptr, end); | |
1628 | else if (!strncmp(start, "mkdmnod", MAX(7, chptr-start))) | |
1629 | rc = mkDMNodCommand(chptr, end); | |
1630 | else if (!strncmp(start, "readlink", MAX(8, chptr-start))) | |
1631 | rc = readlinkCommand(chptr, end); | |
1632 | else if (!strncmp(start, "setquiet", MAX(8, chptr-start))) | |
1633 | rc = setQuietCommand(chptr, end); | |
1634 | #ifdef DEBUG | |
1635 | else if (!strncmp(start, "cat", MAX(3, chptr-start))) | |
1636 | rc = catCommand(chptr, end); | |
1637 | else if (!strncmp(start, "ls", MAX(2, chptr-start))) | |
1638 | rc = lsCommand(chptr, end); | |
1639 | #endif | |
1640 | else { | |
1641 | *chptr = '\0'; | |
1642 | rc = otherCommand(start, chptr + 1, end, 1); | |
1643 | } | |
1644 | ||
1645 | start = end + 1; | |
1646 | } | |
1647 | ||
1648 | return rc; | |
1649 | } | |
1650 | ||
1651 | int main(int argc, char **argv) { | |
1652 | int fd = 0; | |
1653 | char * name; | |
1654 | int rc; | |
1655 | int force = 0; | |
1656 | ||
1657 | name = strrchr(argv[0], '/'); | |
1658 | if (!name) | |
1659 | name = argv[0]; | |
1660 | else | |
1661 | name++; | |
1662 | ||
1663 | if (!strcmp(name, "modprobe")) | |
1664 | exit(0); | |
1665 | if (!strcmp(name, "hotplug")) { | |
1666 | argv[0] = strdup("/sbin/udev"); | |
1667 | execv(argv[0], argv); | |
1668 | printf("ERROR: exec of udev failed!\n"); | |
1669 | exit(1); | |
1670 | } | |
1671 | ||
1672 | testing = (getppid() != 0) && (getppid() != 1); | |
1673 | argv++, argc--; | |
1674 | ||
1675 | while (argc && **argv == '-') { | |
1676 | if (!strcmp(*argv, "--force")) { | |
1677 | force = 1; | |
1678 | argv++, argc--; | |
1679 | testing = 0; | |
1680 | } else if (!strcmp(*argv, "--quiet")) { | |
1681 | quiet = 1; | |
1682 | argv++, argc--; | |
1683 | } else if (!strcmp(*argv, "--reallyquiet")) { | |
1684 | reallyquiet = 1; | |
1685 | argv++, argc--; | |
1686 | } else { | |
1687 | printf("unknown argument %s\n", *argv); | |
1688 | return 1; | |
1689 | } | |
1690 | } | |
1691 | ||
1692 | if (force && !quiet) | |
1693 | printf("(forcing normal run)\n"); | |
1694 | ||
1695 | if (testing && !quiet) | |
1696 | printf("(running in test mode).\n"); | |
1697 | ||
1698 | if (!quiet) printf("Red Hat nash version %s starting\n", VERSION); | |
1699 | ||
1700 | if (*argv) { | |
1701 | fd = open(*argv, O_RDONLY, 0); | |
1702 | if (fd < 0) { | |
1703 | printf("nash: cannot open %s: %d\n", *argv, errno); | |
1704 | exit(1); | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | /* runStartup closes fd */ | |
1709 | rc = runStartup(fd); | |
1710 | ||
1711 | return rc; | |
1712 | } |