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- Committer: Teddy Hogeborn
- Date: 2009-10-22 00:05:01 UTC
- Revision ID: teddy@fukt.bsnet.se-20091022000501-g792e99q5g1wkyet
Merge from release branch.
added
removed
plugins.d/usplash.c
31
31
#include <fcntl.h> /* open(), O_WRONLY, O_RDONLY */
32
32
#include <iso646.h> /* and, or, not*/
33
33
#include <errno.h> /* errno, EINTR */
34
#include <error.h>
35
34
#include <sys/types.h> /* size_t, ssize_t, pid_t, DIR, struct
36
35
dirent */
37
36
#include <stddef.h> /* NULL */
38
37
#include <string.h> /* strlen(), memcmp() */
39
#include <stdio.h> /* asprintf()*/
38
#include <stdio.h> /* asprintf(), perror() */
40
39
#include <unistd.h> /* close(), write(), readlink(),
41
40
read(), STDOUT_FILENO, sleep(),
42
41
fork(), setuid(), geteuid(),
43
42
setsid(), chdir(), dup2(),
44
43
STDERR_FILENO, execv() */
45
44
#include <stdlib.h> /* free(), EXIT_FAILURE, realloc(),
46
EXIT_SUCCESS, malloc(), _exit(),
47
getenv() */
45
EXIT_SUCCESS, malloc(), _exit() */
46
#include <stdlib.h> /* getenv() */
48
47
#include <dirent.h> /* opendir(), readdir(), closedir() */
49
48
#include <inttypes.h> /* intmax_t, strtoimax() */
50
49
#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK */
51
#include <sysexits.h> /* EX_OSERR, EX_UNAVAILABLE */
52
50
53
51
sig_atomic_t interrupted_by_signal = 0;
54
52
int signal_received;
154
152
size_t cmdline_len = 0;
155
153
DIR *proc_dir = opendir("/proc");
156
154
if(proc_dir == NULL){
157
error(0, errno, "opendir");
155
perror("opendir");
158
156
return -1;
159
157
}
160
158
errno = 0;
182
180
char *exe_link;
183
181
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
184
182
if(ret == -1){
185
error(0, errno, "asprintf");
183
perror("asprintf");
186
184
goto fail_find_usplash;
187
185
}
188
186
194
192
free(exe_link);
195
193
continue;
196
194
}
197
error(0, errno, "lstat");
195
perror("lstat");
198
196
free(exe_link);
199
197
goto fail_find_usplash;
200
198
}
225
223
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
226
224
proc_ent->d_name);
227
225
if(ret == -1){
228
error(0, errno, "asprintf");
226
perror("asprintf");
229
227
goto fail_find_usplash;
230
228
}
231
229
cl_fd = open(cmdline_filename, O_RDONLY);
232
230
free(cmdline_filename);
233
231
if(cl_fd == -1){
234
error(0, errno, "open");
232
perror("open");
235
233
goto fail_find_usplash;
236
234
}
237
235
}
243
241
if(cmdline_len + blocksize > cmdline_allocated){
244
242
tmp = realloc(cmdline, cmdline_allocated + blocksize);
245
243
if(tmp == NULL){
246
error(0, errno, "realloc");
244
perror("realloc");
247
245
close(cl_fd);
248
246
goto fail_find_usplash;
249
247
}
254
252
sret = read(cl_fd, cmdline + cmdline_len,
255
253
cmdline_allocated - cmdline_len);
256
254
if(sret == -1){
257
error(0, errno, "read");
255
perror("read");
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256
close(cl_fd);
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257
goto fail_find_usplash;
260
258
}
262
260
} while(sret != 0);
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ret = close(cl_fd);
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if(ret == -1){
265
error(0, errno, "close");
263
perror("close");
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264
goto fail_find_usplash;
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265
}
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266
}
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/* Close directory */
270
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ret = closedir(proc_dir);
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269
if(ret == -1){
272
error(0, errno, "closedir");
270
perror("closedir");
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271
goto fail_find_usplash;
274
272
}
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/* Success */
299
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size_t buf_len = 0;
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pid_t usplash_pid = -1;
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bool usplash_accessed = false;
302
int status = EXIT_FAILURE; /* Default failure exit status */
303
300
304
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char *prompt = makeprompt();
305
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if(prompt == NULL){
306
status = EX_OSERR;
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goto failure;
308
304
}
309
305
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size_t cmdline_len = 0;
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usplash_pid = find_usplash(&cmdline, &cmdline_len);
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if(usplash_pid == 0){
315
status = EX_UNAVAILABLE;
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goto failure;
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}
318
313
324
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sigemptyset(&new_action.sa_mask);
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ret = sigaddset(&new_action.sa_mask, SIGINT);
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321
if(ret == -1){
327
error(0, errno, "sigaddset");
328
status = EX_OSERR;
322
perror("sigaddset");
329
323
goto failure;
330
324
}
331
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ret = sigaddset(&new_action.sa_mask, SIGHUP);
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326
if(ret == -1){
333
error(0, errno, "sigaddset");
334
status = EX_OSERR;
327
perror("sigaddset");
335
328
goto failure;
336
329
}
337
330
ret = sigaddset(&new_action.sa_mask, SIGTERM);
338
331
if(ret == -1){
339
error(0, errno, "sigaddset");
340
status = EX_OSERR;
332
perror("sigaddset");
341
333
goto failure;
342
334
}
343
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ret = sigaction(SIGINT, NULL, &old_action);
344
336
if(ret == -1){
345
337
if(errno != EINTR){
346
error(0, errno, "sigaction");
347
status = EX_OSERR;
338
perror("sigaction");
348
339
}
349
340
goto failure;
350
341
}
352
343
ret = sigaction(SIGINT, &new_action, NULL);
353
344
if(ret == -1){
354
345
if(errno != EINTR){
355
error(0, errno, "sigaction");
356
status = EX_OSERR;
346
perror("sigaction");
357
347
}
358
348
goto failure;
359
349
}
361
351
ret = sigaction(SIGHUP, NULL, &old_action);
362
352
if(ret == -1){
363
353
if(errno != EINTR){
364
error(0, errno, "sigaction");
365
status = EX_OSERR;
354
perror("sigaction");
366
355
}
367
356
goto failure;
368
357
}
370
359
ret = sigaction(SIGHUP, &new_action, NULL);
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360
if(ret == -1){
372
361
if(errno != EINTR){
373
error(0, errno, "sigaction");
374
status = EX_OSERR;
362
perror("sigaction");
375
363
}
376
364
goto failure;
377
365
}
379
367
ret = sigaction(SIGTERM, NULL, &old_action);
380
368
if(ret == -1){
381
369
if(errno != EINTR){
382
error(0, errno, "sigaction");
383
status = EX_OSERR;
370
perror("sigaction");
384
371
}
385
372
goto failure;
386
373
}
388
375
ret = sigaction(SIGTERM, &new_action, NULL);
389
376
if(ret == -1){
390
377
if(errno != EINTR){
391
error(0, errno, "sigaction");
392
status = EX_OSERR;
378
perror("sigaction");
393
379
}
394
380
goto failure;
395
381
}
400
386
/* Write command to FIFO */
401
387
if(not usplash_write(&fifo_fd, "TIMEOUT", "0")){
402
388
if(errno != EINTR){
403
error(0, errno, "usplash_write");
404
status = EX_OSERR;
389
perror("usplash_write");
405
390
}
406
391
goto failure;
407
392
}
412
397
413
398
if(not usplash_write(&fifo_fd, "INPUTQUIET", prompt)){
414
399
if(errno != EINTR){
415
error(0, errno, "usplash_write");
416
status = EX_OSERR;
400
perror("usplash_write");
417
401
}
418
402
goto failure;
419
403
}
430
414
outfifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
431
415
if(outfifo_fd == -1){
432
416
if(errno != EINTR){
433
error(0, errno, "open");
434
status = EX_OSERR;
417
perror("open");
435
418
}
436
419
goto failure;
437
420
}
449
432
char *tmp = realloc(buf, buf_allocated + blocksize);
450
433
if(tmp == NULL){
451
434
if(errno != EINTR){
452
error(0, errno, "realloc");
453
status = EX_OSERR;
435
perror("realloc");
454
436
}
455
437
goto failure;
456
438
}
461
443
buf_allocated - buf_len);
462
444
if(sret == -1){
463
445
if(errno != EINTR){
464
error(0, errno, "read");
465
status = EX_OSERR;
446
perror("read");
466
447
}
467
448
TEMP_FAILURE_RETRY(close(outfifo_fd));
468
449
goto failure;
476
457
ret = close(outfifo_fd);
477
458
if(ret == -1){
478
459
if(errno != EINTR){
479
error(0, errno, "close");
480
status = EX_OSERR;
460
perror("close");
481
461
}
482
462
goto failure;
483
463
}
489
469
490
470
if(not usplash_write(&fifo_fd, "TIMEOUT", "15")){
491
471
if(errno != EINTR){
492
error(0, errno, "usplash_write");
493
status = EX_OSERR;
472
perror("usplash_write");
494
473
}
495
474
goto failure;
496
475
}
502
481
ret = close(fifo_fd);
503
482
if(ret == -1){
504
483
if(errno != EINTR){
505
error(0, errno, "close");
506
status = EX_OSERR;
484
perror("close");
507
485
}
508
486
goto failure;
509
487
}
516
494
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
517
495
if(sret == -1){
518
496
if(errno != EINTR){
519
error(0, errno, "write");
520
status = EX_OSERR;
497
perror("write");
521
498
}
522
499
goto failure;
523
500
}
546
523
547
524
/* If usplash was never accessed, we can stop now */
548
525
if(not usplash_accessed){
549
return status;
526
return EXIT_FAILURE;
550
527
}
551
528
552
529
/* Close FIFO */
553
530
if(fifo_fd != -1){
554
531
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
555
532
if(ret == -1 and errno != EINTR){
556
error(0, errno, "close");
533
perror("close");
557
534
}
558
535
fifo_fd = -1;
559
536
}
562
539
if(outfifo_fd != -1){
563
540
ret = (int)TEMP_FAILURE_RETRY(close(outfifo_fd));
564
541
if(ret == -1){
565
error(0, errno, "close");
542
perror("close");
566
543
}
567
544
}
568
545
576
553
(sizeof(char *)
577
554
* (size_t)(cmdline_argc + 2)));
578
555
if(tmp == NULL){
579
error(0, errno, "realloc");
556
perror("realloc");
580
557
free(cmdline_argv);
581
return status;
558
return EXIT_FAILURE;
582
559
}
583
560
cmdline_argv = tmp;
584
561
cmdline_argv[cmdline_argc] = cmdline + position;
603
580
the real user ID (_mandos) */
604
581
ret = setuid(geteuid());
605
582
if(ret == -1){
606
error(0, errno, "setuid");
583
perror("setuid");
607
584
}
608
585
609
586
setsid();
610
587
ret = chdir("/");
611
if(ret == -1){
612
error(0, errno, "chdir");
613
_exit(EX_OSERR);
614
}
615
588
/* if(fork() != 0){ */
616
589
/* _exit(EXIT_SUCCESS); */
617
590
/* } */
618
591
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
619
592
if(ret == -1){
620
error(0, errno, "dup2");
621
_exit(EX_OSERR);
593
perror("dup2");
594
_exit(EXIT_FAILURE);
622
595
}
623
596
624
597
execv(usplash_name, cmdline_argv);
625
598
if(not interrupted_by_signal){
626
error(0, errno, "execv");
599
perror("execv");
627
600
}
628
601
free(cmdline);
629
602
free(cmdline_argv);
630
_exit(EX_OSERR);
603
_exit(EXIT_FAILURE);
631
604
}
632
605
free(cmdline);
633
606
free(cmdline_argv);
634
607
sleep(2);
635
608
if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
636
609
if(errno != EINTR){
637
error(0, errno, "usplash_write");
610
perror("usplash_write");
638
611
}
639
612
}
640
613
642
615
if(fifo_fd != -1){
643
616
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
644
617
if(ret == -1 and errno != EINTR){
645
error(0, errno, "close");
618
perror("close");
646
619
}
647
620
fifo_fd = -1;
648
621
}
653
626
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
654
627
&signal_action, NULL));
655
628
if(ret == -1){
656
error(0, errno, "sigaction");
629
perror("sigaction");
657
630
}
658
631
do {
659
632
ret = raise(signal_received);
660
633
} while(ret != 0 and errno == EINTR);
661
634
if(ret != 0){
662
error(0, errno, "raise");
635
perror("raise");
663
636
abort();
664
637
}
665
638
TEMP_FAILURE_RETRY(pause());
666
639
}
667
640
668
return status;
641
return EXIT_FAILURE;
669
642
}
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