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- Committer: Teddy Hogeborn
- Date: 2009-02-23 11:52:42 UTC
- Revision ID: teddy@fukt.bsnet.se-20090223115242-5930ewin7m4o6zpr
* README (The Plugin System): Improve wording.
- files modified:
- Makefile
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), getgid(),
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
WEXITSTATUS() */
43
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
45
readdir(), closedir(), dirfd() */
47
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
47
fcntl(), setuid(), setgid(),
53
52
close() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
54
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
55
#include <string.h> /* strsep, strlen(), asprintf() */
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
68
66
*/
69
67
#include <errno.h> /* errno, EBADF */
70
68
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
72
69
73
70
#define BUFFER_SIZE 256
74
71
103
100
/* Gets an existing plugin based on name,
104
101
or if none is found, creates a new one */
105
102
static plugin *getplugin(char *name){
106
/* Check for existing plugin with that name */
103
/* Check for exiting plugin with that name */
107
104
for(plugin *p = plugin_list; p != NULL; p = p->next){
108
105
if((p->name == name)
109
106
or (p->name and name and (strcmp(p->name, name) == 0))){
111
108
}
112
109
}
113
110
/* Create a new plugin */
114
plugin *new_plugin = NULL;
115
do {
116
new_plugin = malloc(sizeof(plugin));
117
} while(new_plugin == NULL and errno == EINTR);
111
plugin *new_plugin = malloc(sizeof(plugin));
118
112
if(new_plugin == NULL){
119
113
return NULL;
120
114
}
121
115
char *copy_name = NULL;
122
116
if(name != NULL){
123
do {
124
copy_name = strdup(name);
125
} while(copy_name == NULL and errno == EINTR);
117
copy_name = strdup(name);
126
118
if(copy_name == NULL){
127
int e = errno;
128
119
free(new_plugin);
129
errno = e;
130
120
return NULL;
131
121
}
132
122
}
136
126
.disabled = false,
137
127
.next = plugin_list };
138
128
139
do {
140
new_plugin->argv = malloc(sizeof(char *) * 2);
141
} while(new_plugin->argv == NULL and errno == EINTR);
129
new_plugin->argv = malloc(sizeof(char *) * 2);
142
130
if(new_plugin->argv == NULL){
143
int e = errno;
144
131
free(copy_name);
145
132
free(new_plugin);
146
errno = e;
147
133
return NULL;
148
134
}
149
135
new_plugin->argv[0] = copy_name;
150
136
new_plugin->argv[1] = NULL;
151
137
152
do {
153
new_plugin->environ = malloc(sizeof(char *));
154
} while(new_plugin->environ == NULL and errno == EINTR);
138
new_plugin->environ = malloc(sizeof(char *));
155
139
if(new_plugin->environ == NULL){
156
int e = errno;
157
140
free(copy_name);
158
141
free(new_plugin->argv);
159
142
free(new_plugin);
160
errno = e;
161
143
return NULL;
162
144
}
163
145
new_plugin->environ[0] = NULL;
171
153
static bool add_to_char_array(const char *new, char ***array,
172
154
int *len){
173
155
/* Resize the pointed-to array to hold one more pointer */
174
do {
175
*array = realloc(*array, sizeof(char *)
176
* (size_t) ((*len) + 2));
177
} while(*array == NULL and errno == EINTR);
156
*array = realloc(*array, sizeof(char *)
157
* (size_t) ((*len) + 2));
178
158
/* Malloc check */
179
159
if(*array == NULL){
180
160
return false;
181
161
}
182
162
/* Make a copy of the new string */
183
char *copy;
184
do {
185
copy = strdup(new);
186
} while(copy == NULL and errno == EINTR);
163
char *copy = strdup(new);
187
164
if(copy == NULL){
188
165
return false;
189
166
}
215
192
if(strncmp(*e, def, namelen + 1) == 0){
216
193
/* It already exists */
217
194
if(replace){
218
char *new;
219
do {
220
new = realloc(*e, strlen(def) + 1);
221
} while(new == NULL and errno == EINTR);
195
char *new = realloc(*e, strlen(def) + 1);
222
196
if(new == NULL){
223
197
return false;
224
198
}
234
208
/*
235
209
* Based on the example in the GNU LibC manual chapter 13.13 "File
236
210
* Descriptor Flags".
237
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
* *Note File Descriptor Flags:(libc)Descriptor Flags.
238
212
*/
239
213
static int set_cloexec_flag(int fd){
240
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
int ret = fcntl(fd, F_GETFD, 0);
241
215
/* If reading the flags failed, return error indication now. */
242
216
if(ret < 0){
243
217
return ret;
244
218
}
245
219
/* Store modified flag word in the descriptor. */
246
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
247
ret | FD_CLOEXEC));
220
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
248
221
}
249
222
250
223
342
315
fd_set rfds_all;
343
316
int ret, maxfd = 0;
344
317
ssize_t sret;
318
intmax_t tmpmax;
345
319
uid_t uid = 65534;
346
320
gid_t gid = 65534;
347
321
bool debug = false;
401
375
.doc = "Group ID the plugins will run as", .group = 3 },
402
376
{ .name = "debug", .key = 132,
403
377
.doc = "Debug mode", .group = 4 },
404
/*
405
* These reproduce what we would get without ARGP_NO_HELP
406
*/
407
{ .name = "help", .key = '?',
408
.doc = "Give this help list", .group = -1 },
409
{ .name = "usage", .key = -3,
410
.doc = "Give a short usage message", .group = -1 },
411
{ .name = "version", .key = 'V',
412
.doc = "Print program version", .group = -1 },
413
378
{ .name = NULL }
414
379
};
415
380
416
error_t parse_opt(int key, char *arg, struct argp_state *state){
417
errno = 0;
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
383
char *tmp;
418
384
switch(key){
419
char *tmp;
420
intmax_t tmpmax;
421
385
case 'g': /* --global-options */
422
{
386
if(arg != NULL){
423
387
char *plugin_option;
424
388
while((plugin_option = strsep(&arg, ",")) != NULL){
389
if(plugin_option[0] == '\0'){
390
continue;
391
}
425
392
if(not add_argument(getplugin(NULL), plugin_option)){
426
break;
393
perror("add_argument");
394
return ARGP_ERR_UNKNOWN;
427
395
}
428
396
}
429
397
}
430
398
break;
431
399
case 'G': /* --global-env */
432
add_environment(getplugin(NULL), arg, true);
400
if(arg == NULL){
401
break;
402
}
403
if(not add_environment(getplugin(NULL), arg, true)){
404
perror("add_environment");
405
}
433
406
break;
434
407
case 'o': /* --options-for */
435
{
436
char *option_list = strchr(arg, ':');
437
if(option_list == NULL){
438
argp_error(state, "No colon in \"%s\"", arg);
439
errno = EINVAL;
440
break;
441
}
442
*option_list = '\0';
443
option_list++;
444
if(arg[0] == '\0'){
445
argp_error(state, "Empty plugin name");
446
errno = EINVAL;
447
break;
448
}
449
char *option;
450
while((option = strsep(&option_list, ",")) != NULL){
451
if(not add_argument(getplugin(arg), option)){
452
break;
408
if(arg != NULL){
409
char *plugin_name = strsep(&arg, ":");
410
if(plugin_name[0] == '\0'){
411
break;
412
}
413
char *plugin_option;
414
while((plugin_option = strsep(&arg, ",")) != NULL){
415
if(not add_argument(getplugin(plugin_name), plugin_option)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
453
418
}
454
419
}
455
420
}
456
421
break;
457
422
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
458
426
{
459
427
char *envdef = strchr(arg, ':');
460
428
if(envdef == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
429
break;
464
430
}
465
431
*envdef = '\0';
466
envdef++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
471
434
}
472
add_environment(getplugin(arg), envdef, true);
473
435
}
474
436
break;
475
437
case 'd': /* --disable */
476
{
438
if(arg != NULL){
477
439
plugin *p = getplugin(arg);
478
if(p != NULL){
479
p->disabled = true;
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
480
442
}
443
p->disabled = true;
481
444
}
482
445
break;
483
446
case 'e': /* --enable */
484
{
447
if(arg != NULL){
485
448
plugin *p = getplugin(arg);
486
if(p != NULL){
487
p->disabled = false;
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
488
451
}
452
p->disabled = false;
489
453
}
490
454
break;
491
455
case 128: /* --plugin-dir */
492
456
free(plugindir);
493
457
plugindir = strdup(arg);
458
if(plugindir == NULL){
459
perror("strdup");
460
}
494
461
break;
495
462
case 129: /* --config-file */
496
463
/* This is already done by parse_opt_config_file() */
497
464
break;
498
465
case 130: /* --userid */
466
errno = 0;
499
467
tmpmax = strtoimax(arg, &tmp, 10);
500
468
if(errno != 0 or tmp == arg or *tmp != '\0'
501
469
or tmpmax != (uid_t)tmpmax){
502
argp_error(state, "Bad user ID number: \"%s\", using %"
503
PRIdMAX, arg, (intmax_t)uid);
504
break;
470
fprintf(stderr, "Bad user ID number: \"%s\", using %"
471
PRIdMAX "\n", arg, (intmax_t)uid);
472
} else {
473
uid = (uid_t)tmpmax;
505
474
}
506
uid = (uid_t)tmpmax;
507
475
break;
508
476
case 131: /* --groupid */
477
errno = 0;
509
478
tmpmax = strtoimax(arg, &tmp, 10);
510
479
if(errno != 0 or tmp == arg or *tmp != '\0'
511
480
or tmpmax != (gid_t)tmpmax){
512
argp_error(state, "Bad group ID number: \"%s\", using %"
513
PRIdMAX, arg, (intmax_t)gid);
514
break;
481
fprintf(stderr, "Bad group ID number: \"%s\", using %"
482
PRIdMAX "\n", arg, (intmax_t)gid);
483
} else {
484
gid = (gid_t)tmpmax;
515
485
}
516
gid = (gid_t)tmpmax;
517
486
break;
518
487
case 132: /* --debug */
519
488
debug = true;
520
489
break;
521
/*
522
* These reproduce what we would get without ARGP_NO_HELP
523
*/
524
case '?': /* --help */
525
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
526
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
527
case -3: /* --usage */
528
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
529
argp_state_help(state, state->out_stream,
530
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
531
case 'V': /* --version */
532
fprintf(state->out_stream, "%s\n", argp_program_version);
533
exit(EXIT_SUCCESS);
534
break;
535
490
/*
536
491
* When adding more options before this line, remember to also add a
537
492
* "case" to the "parse_opt_config_file" function below.
540
495
/* Cryptsetup always passes an argument, which is an empty
541
496
string if "none" was specified in /etc/crypttab. So if
542
497
argument was empty, we ignore it silently. */
543
if(arg[0] == '\0'){
544
break;
498
if(arg[0] != '\0'){
499
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
545
500
}
501
break;
502
case ARGP_KEY_END:
503
break;
546
504
default:
547
505
return ARGP_ERR_UNKNOWN;
548
506
}
549
return errno; /* Set to 0 at start */
507
return 0;
550
508
}
551
509
552
510
/* This option parser is the same as parse_opt() above, except it
554
512
error_t parse_opt_config_file(int key, char *arg,
555
513
__attribute__((unused))
556
514
struct argp_state *state){
557
errno = 0;
558
515
switch(key){
559
516
case 'g': /* --global-options */
560
517
case 'G': /* --global-env */
567
524
case 129: /* --config-file */
568
525
free(argfile);
569
526
argfile = strdup(arg);
570
break;
527
if(argfile == NULL){
528
perror("strdup");
529
}
530
break;
571
531
case 130: /* --userid */
572
532
case 131: /* --groupid */
573
533
case 132: /* --debug */
574
case '?': /* --help */
575
case -3: /* --usage */
576
case 'V': /* --version */
577
534
case ARGP_KEY_ARG:
535
case ARGP_KEY_END:
578
536
break;
579
537
default:
580
538
return ARGP_ERR_UNKNOWN;
581
539
}
582
return errno;
540
return 0;
583
541
}
584
542
585
543
struct argp argp = { .options = options,
589
547
590
548
/* Parse using parse_opt_config_file() in order to get the custom
591
549
config file location, if any. */
592
ret = argp_parse(&argp, argc, argv,
593
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
594
NULL, NULL);
595
switch(ret){
596
case 0:
597
break;
598
case ENOMEM:
599
default:
600
errno = ret;
601
perror("argp_parse");
602
exitstatus = EX_OSERR;
603
goto fallback;
604
case EINVAL:
605
exitstatus = EX_USAGE;
550
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
551
if(ret == ARGP_ERR_UNKNOWN){
552
fprintf(stderr, "Unknown error while parsing arguments\n");
553
exitstatus = EXIT_FAILURE;
606
554
goto fallback;
607
555
}
608
556
614
562
conffp = fopen(AFILE, "r");
615
563
} else {
616
564
conffp = fopen(argfile, "r");
617
}
565
}
618
566
if(conffp != NULL){
619
567
char *org_line = NULL;
620
568
char *p, *arg, *new_arg, *line;
664
612
goto fallback;
665
613
}
666
614
custom_argv[custom_argc-1] = new_arg;
667
custom_argv[custom_argc] = NULL;
615
custom_argv[custom_argc] = NULL;
668
616
}
669
617
}
670
do {
671
ret = fclose(conffp);
672
} while(ret == EOF and errno == EINTR);
673
if(ret == EOF){
674
perror("fclose");
675
exitstatus = EXIT_FAILURE;
676
goto fallback;
677
}
678
618
free(org_line);
679
619
} else {
680
620
/* Check for harmful errors and go to fallback. Other errors might
685
625
goto fallback;
686
626
}
687
627
}
688
/* If there were any arguments from the configuration file, pass
689
them to parser as command line arguments */
628
/* If there was any arguments from configuration file,
629
pass them to parser as command arguments */
690
630
if(custom_argv != NULL){
691
ret = argp_parse(&argp, custom_argc, custom_argv,
692
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
693
NULL, NULL);
694
switch(ret){
695
case 0:
696
break;
697
case ENOMEM:
698
default:
699
errno = ret;
700
perror("argp_parse");
701
exitstatus = EX_OSERR;
702
goto fallback;
703
case EINVAL:
704
exitstatus = EX_CONFIG;
631
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
632
0, NULL);
633
if(ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
exitstatus = EXIT_FAILURE;
705
636
goto fallback;
706
637
}
707
638
}
708
639
709
640
/* Parse actual command line arguments, to let them override the
710
641
config file */
711
ret = argp_parse(&argp, argc, argv,
712
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
713
NULL, NULL);
714
switch(ret){
715
case 0:
716
break;
717
case ENOMEM:
718
default:
719
errno = ret;
720
perror("argp_parse");
721
exitstatus = EX_OSERR;
722
goto fallback;
723
case EINVAL:
724
exitstatus = EX_USAGE;
642
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
725
646
goto fallback;
726
647
}
727
648
749
670
perror("setuid");
750
671
}
751
672
752
/* Open plugin directory with close_on_exec flag */
673
if(plugindir == NULL){
674
dir = opendir(PDIR);
675
} else {
676
dir = opendir(plugindir);
677
}
678
679
if(dir == NULL){
680
perror("Could not open plugin dir");
681
exitstatus = EXIT_FAILURE;
682
goto fallback;
683
}
684
685
/* Set the FD_CLOEXEC flag on the directory, if possible */
753
686
{
754
int dir_fd = -1;
755
if(plugindir == NULL){
756
dir_fd = open(PDIR, O_RDONLY |
757
#ifdef O_CLOEXEC
758
O_CLOEXEC
759
#else /* not O_CLOEXEC */
760
0
761
#endif /* not O_CLOEXEC */
762
);
763
} else {
764
dir_fd = open(plugindir, O_RDONLY |
765
#ifdef O_CLOEXEC
766
O_CLOEXEC
767
#else /* not O_CLOEXEC */
768
0
769
#endif /* not O_CLOEXEC */
770
);
771
}
772
if(dir_fd == -1){
773
perror("Could not open plugin dir");
774
exitstatus = EXIT_FAILURE;
775
goto fallback;
776
}
777
778
#ifndef O_CLOEXEC
779
/* Set the FD_CLOEXEC flag on the directory */
780
ret = set_cloexec_flag(dir_fd);
781
if(ret < 0){
782
perror("set_cloexec_flag");
783
TEMP_FAILURE_RETRY(close(dir_fd));
784
exitstatus = EXIT_FAILURE;
785
goto fallback;
786
}
787
#endif /* O_CLOEXEC */
788
789
dir = fdopendir(dir_fd);
790
if(dir == NULL){
791
perror("Could not open plugin dir");
792
TEMP_FAILURE_RETRY(close(dir_fd));
793
exitstatus = EXIT_FAILURE;
794
goto fallback;
687
int dir_fd = dirfd(dir);
688
if(dir_fd >= 0){
689
ret = set_cloexec_flag(dir_fd);
690
if(ret < 0){
691
perror("set_cloexec_flag");
692
exitstatus = EXIT_FAILURE;
693
goto fallback;
694
}
795
695
}
796
696
}
797
697
799
699
800
700
/* Read and execute any executable in the plugin directory*/
801
701
while(true){
802
do {
803
dirst = readdir(dir);
804
} while(dirst == NULL and errno == EINTR);
702
dirst = readdir(dir);
805
703
806
704
/* All directory entries have been processed */
807
705
if(dirst == NULL){
861
759
862
760
char *filename;
863
761
if(plugindir == NULL){
864
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
865
dirst->d_name));
762
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
866
763
} else {
867
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
868
plugindir,
869
dirst->d_name));
764
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
870
765
}
871
766
if(ret < 0){
872
767
perror("asprintf");
873
768
continue;
874
769
}
875
770
876
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
771
ret = stat(filename, &st);
877
772
if(ret == -1){
878
773
perror("stat");
879
774
free(filename);
881
776
}
882
777
883
778
/* Ignore non-executable files */
884
if(not S_ISREG(st.st_mode)
885
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
779
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
886
780
if(debug){
887
781
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
888
782
" with bad type or mode\n", filename);
934
828
}
935
829
936
830
int pipefd[2];
937
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
831
ret = pipe(pipefd);
938
832
if(ret == -1){
939
833
perror("pipe");
940
834
exitstatus = EXIT_FAILURE;
954
848
goto fallback;
955
849
}
956
850
/* Block SIGCHLD until process is safely in process list */
957
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
958
&sigchld_action.sa_mask,
959
NULL));
851
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
960
852
if(ret < 0){
961
853
perror("sigprocmask");
962
854
exitstatus = EXIT_FAILURE;
963
855
goto fallback;
964
856
}
965
857
/* Starting a new process to be watched */
966
pid_t pid;
967
do {
968
pid = fork();
969
} while(pid == -1 and errno == EINTR);
858
pid_t pid = fork();
970
859
if(pid == -1){
971
860
perror("fork");
972
861
exitstatus = EXIT_FAILURE;
1010
899
/* no return */
1011
900
}
1012
901
/* Parent process */
1013
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1014
pipe */
902
close(pipefd[1]); /* Close unused write end of pipe */
1015
903
free(filename);
1016
904
plugin *new_plugin = getplugin(dirst->d_name);
1017
905
if(new_plugin == NULL){
1018
906
perror("getplugin");
1019
ret = (int)(TEMP_FAILURE_RETRY
1020
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1021
NULL)));
907
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1022
908
if(ret < 0){
1023
909
perror("sigprocmask");
1024
910
}
1031
917
1032
918
/* Unblock SIGCHLD so signal handler can be run if this process
1033
919
has already completed */
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1035
&sigchld_action.sa_mask,
1036
NULL));
920
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
921
if(ret < 0){
1038
922
perror("sigprocmask");
1039
923
exitstatus = EXIT_FAILURE;
1040
924
goto fallback;
1041
925
}
1042
926
1043
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1044
-Wconversion */
927
FD_SET(new_plugin->fd, &rfds_all);
1045
928
1046
929
if(maxfd < new_plugin->fd){
1047
930
maxfd = new_plugin->fd;
1048
931
}
1049
932
}
1050
933
1051
TEMP_FAILURE_RETRY(closedir(dir));
934
closedir(dir);
1052
935
dir = NULL;
1053
936
free_plugin(getplugin(NULL));
1054
937
1067
950
while(plugin_list){
1068
951
fd_set rfds = rfds_all;
1069
952
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1070
if(select_ret == -1 and errno != EINTR){
953
if(select_ret == -1){
1071
954
perror("select");
1072
955
exitstatus = EXIT_FAILURE;
1073
956
goto fallback;
1090
973
WEXITSTATUS(proc->status));
1091
974
} else if(WIFSIGNALED(proc->status)){
1092
975
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1093
" signal %d: %s\n", proc->name,
976
" signal %d\n", proc->name,
1094
977
(intmax_t) (proc->pid),
1095
WTERMSIG(proc->status),
1096
strsignal(WTERMSIG(proc->status)));
978
WTERMSIG(proc->status));
1097
979
} else if(WCOREDUMP(proc->status)){
1098
980
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1099
981
" core\n", proc->name, (intmax_t) (proc->pid));
1101
983
}
1102
984
1103
985
/* Remove the plugin */
1104
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion */
986
FD_CLR(proc->fd, &rfds_all);
1106
987
1107
988
/* Block signal while modifying process_list */
1108
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1109
(SIG_BLOCK,
1110
&sigchld_action.sa_mask,
1111
NULL));
989
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1112
990
if(ret < 0){
1113
991
perror("sigprocmask");
1114
992
exitstatus = EXIT_FAILURE;
1120
998
proc = next_plugin;
1121
999
1122
1000
/* We are done modifying process list, so unblock signal */
1123
ret = (int)(TEMP_FAILURE_RETRY
1124
(sigprocmask(SIG_UNBLOCK,
1125
&sigchld_action.sa_mask, NULL)));
1001
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1002
NULL);
1126
1003
if(ret < 0){
1127
1004
perror("sigprocmask");
1128
1005
exitstatus = EXIT_FAILURE;
1148
1025
}
1149
1026
1150
1027
/* This process has not completed. Does it have any output? */
1151
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1152
warning from
1153
-Wconversion */
1028
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1154
1029
/* This process had nothing to say at this time */
1155
1030
proc = proc->next;
1156
1031
continue;
1167
1042
proc->buffer_size += BUFFER_SIZE;
1168
1043
}
1169
1044
/* Read from the process */
1170
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1171
proc->buffer
1172
+ proc->buffer_length,
1173
BUFFER_SIZE));
1045
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1046
BUFFER_SIZE);
1174
1047
if(sret < 0){
1175
1048
/* Read error from this process; ignore the error */
1176
1049
proc = proc->next;
1238
1111
}
1239
1112
1240
1113
/* Wait for any remaining child processes to terminate */
1241
do {
1114
do{
1242
1115
ret = wait(NULL);
1243
1116
} while(ret >= 0);
1244
1117
if(errno != ECHILD){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0