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- Committer: Teddy Hogeborn
- Date: 2008-09-19 12:02:03 UTC
- Revision ID: teddy@fukt.bsnet.se-20080919120203-xvsf3w1h0n2bvtkb
* debian/mandos-client.postinst: Use "type" instead of "which". Split
to functions. Create key.
to functions. Create key.
- files added:
- etc-plugins.d-README
- files removed:
- NEWS
- debian/po
- files modified:
- .bzrignore
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
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
8
7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
28
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
28
EXIT_SUCCESS, realloc() */
30
29
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
33
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
33
stat, waitpid(), WIFEXITED(),
35
34
WEXITSTATUS(), wait(), pid_t,
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
40
WEXITSTATUS() */
43
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
42
#include <iso646.h> /* and, or, not */
45
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
48
46
fcntl(), setuid(), setgid(),
49
47
F_GETFD, F_SETFD, FD_CLOEXEC,
50
48
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
49
dup2, STDOUT_FILENO, _exit(),
52
50
execv(), write(), read(),
53
51
close() */
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
53
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
58
55
#include <errno.h> /* errno */
59
56
#include <argp.h> /* struct argp_option, struct
60
57
argp_state, struct argp,
64
61
#include <signal.h> /* struct sigaction, sigemptyset(),
65
62
sigaddset(), sigaction(),
66
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
64
SIG_UNBLOCK, kill() */
69
65
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
66
72
67
#define BUFFER_SIZE 256
73
68
74
69
#define PDIR "/lib/mandos/plugins.d"
75
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
71
77
const char *argp_program_version = "plugin-runner " VERSION;
72
const char *argp_program_version = "plugin-runner 1.0";
78
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
79
74
80
75
typedef struct plugin{
84
79
char **environ;
85
80
int envc;
86
81
bool disabled;
87
82
88
83
/* Variables used for running processes*/
89
84
pid_t pid;
90
85
int fd;
92
87
size_t buffer_size;
93
88
size_t buffer_length;
94
89
bool eof;
95
volatile sig_atomic_t completed;
96
int status;
90
volatile bool completed;
91
volatile int status;
97
92
struct plugin *next;
98
93
} plugin;
99
94
103
98
or if none is found, creates a new one */
104
99
static plugin *getplugin(char *name){
105
100
/* Check for exiting plugin with that name */
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
if((p->name == name)
108
or (p->name and name and (strcmp(p->name, name) == 0))){
101
for (plugin *p = plugin_list; p != NULL; p = p->next){
102
if ((p->name == name)
103
or (p->name and name and (strcmp(p->name, name) == 0))){
109
104
return p;
110
105
}
111
106
}
112
107
/* Create a new plugin */
113
plugin *new_plugin = NULL;
114
do {
115
new_plugin = malloc(sizeof(plugin));
116
} while(new_plugin == NULL and errno == EINTR);
117
if(new_plugin == NULL){
108
plugin *new_plugin = malloc(sizeof(plugin));
109
if (new_plugin == NULL){
118
110
return NULL;
119
111
}
120
112
char *copy_name = NULL;
121
113
if(name != NULL){
122
do {
123
copy_name = strdup(name);
124
} while(copy_name == NULL and errno == EINTR);
114
copy_name = strdup(name);
125
115
if(copy_name == NULL){
126
free(new_plugin);
127
116
return NULL;
128
117
}
129
118
}
130
119
131
*new_plugin = (plugin){ .name = copy_name,
132
.argc = 1,
133
.disabled = false,
134
.next = plugin_list };
120
*new_plugin = (plugin) { .name = copy_name,
121
.argc = 1,
122
.disabled = false,
123
.next = plugin_list };
135
124
136
do {
137
new_plugin->argv = malloc(sizeof(char *) * 2);
138
} while(new_plugin->argv == NULL and errno == EINTR);
139
if(new_plugin->argv == NULL){
125
new_plugin->argv = malloc(sizeof(char *) * 2);
126
if (new_plugin->argv == NULL){
140
127
free(copy_name);
141
128
free(new_plugin);
142
129
return NULL;
144
131
new_plugin->argv[0] = copy_name;
145
132
new_plugin->argv[1] = NULL;
146
133
147
do {
148
new_plugin->environ = malloc(sizeof(char *));
149
} while(new_plugin->environ == NULL and errno == EINTR);
134
new_plugin->environ = malloc(sizeof(char *));
150
135
if(new_plugin->environ == NULL){
151
136
free(copy_name);
152
137
free(new_plugin->argv);
164
149
static bool add_to_char_array(const char *new, char ***array,
165
150
int *len){
166
151
/* Resize the pointed-to array to hold one more pointer */
167
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
152
*array = realloc(*array, sizeof(char *)
153
* (size_t) ((*len) + 2));
171
154
/* Malloc check */
172
155
if(*array == NULL){
173
156
return false;
174
157
}
175
158
/* Make a copy of the new string */
176
char *copy;
177
do {
178
copy = strdup(new);
179
} while(copy == NULL and errno == EINTR);
159
char *copy = strdup(new);
180
160
if(copy == NULL){
181
161
return false;
182
162
}
208
188
if(strncmp(*e, def, namelen + 1) == 0){
209
189
/* It already exists */
210
190
if(replace){
211
char *new;
212
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
191
char *new = realloc(*e, strlen(def) + 1);
215
192
if(new == NULL){
216
193
return false;
217
194
}
227
204
/*
228
205
* Based on the example in the GNU LibC manual chapter 13.13 "File
229
206
* Descriptor Flags".
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
207
* *Note File Descriptor Flags:(libc)Descriptor Flags.
231
208
*/
232
209
static int set_cloexec_flag(int fd){
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
210
int ret = fcntl(fd, F_GETFD, 0);
234
211
/* If reading the flags failed, return error indication now. */
235
212
if(ret < 0){
236
213
return ret;
237
214
}
238
215
/* Store modified flag word in the descriptor. */
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
240
ret | FD_CLOEXEC));
216
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
241
217
}
242
218
243
219
244
220
/* Mark processes as completed when they exit, and save their exit
245
221
status. */
246
222
static void handle_sigchld(__attribute__((unused)) int sig){
247
int old_errno = errno;
248
223
while(true){
249
224
plugin *proc = plugin_list;
250
225
int status;
254
229
break;
255
230
}
256
231
if(pid == -1){
257
if(errno == ECHILD){
258
/* No child processes */
259
break;
232
if (errno != ECHILD){
233
perror("waitpid");
260
234
}
261
perror("waitpid");
235
/* No child processes */
236
break;
262
237
}
263
238
264
239
/* A child exited, find it in process_list */
270
245
continue;
271
246
}
272
247
proc->status = status;
273
proc->completed = 1;
248
proc->completed = true;
274
249
}
275
errno = old_errno;
276
250
}
277
251
278
252
/* Prints out a password to stdout */
300
274
}
301
275
free(plugin_node->environ);
302
276
free(plugin_node->buffer);
303
277
304
278
/* Removes the plugin from the singly-linked list */
305
279
if(plugin_node == plugin_list){
306
280
/* First one - simple */
334
308
struct stat st;
335
309
fd_set rfds_all;
336
310
int ret, maxfd = 0;
337
ssize_t sret;
338
311
uid_t uid = 65534;
339
312
gid_t gid = 65534;
340
313
bool debug = false;
397
370
{ .name = NULL }
398
371
};
399
372
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
402
switch(key){
403
char *tmp;
404
intmax_t tmpmax;
373
error_t parse_opt (int key, char *arg, __attribute__((unused))
374
struct argp_state *state) {
375
switch (key) {
405
376
case 'g': /* --global-options */
406
if(arg != NULL){
407
char *plugin_option;
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
377
if (arg != NULL){
378
char *p;
379
while((p = strsep(&arg, ",")) != NULL){
380
if(p[0] == '\0'){
410
381
continue;
411
382
}
412
if(not add_argument(getplugin(NULL), plugin_option)){
383
if(not add_argument(getplugin(NULL), p)){
413
384
perror("add_argument");
414
385
return ARGP_ERR_UNKNOWN;
415
386
}
425
396
}
426
397
break;
427
398
case 'o': /* --options-for */
428
if(arg != NULL){
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
431
break;
432
}
433
char *plugin_option;
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
399
if (arg != NULL){
400
char *p_name = strsep(&arg, ":");
401
if(p_name[0] == '\0' or arg == NULL){
402
break;
403
}
404
char *opt = strsep(&arg, ":");
405
if(opt[0] == '\0' or opt == NULL){
406
break;
407
}
408
char *p;
409
while((p = strsep(&opt, ",")) != NULL){
410
if(p[0] == '\0'){
411
continue;
412
}
413
if(not add_argument(getplugin(p_name), p)){
436
414
perror("add_argument");
437
415
return ARGP_ERR_UNKNOWN;
438
416
}
455
433
}
456
434
break;
457
435
case 'd': /* --disable */
458
if(arg != NULL){
436
if (arg != NULL){
459
437
plugin *p = getplugin(arg);
460
438
if(p == NULL){
461
439
return ARGP_ERR_UNKNOWN;
464
442
}
465
443
break;
466
444
case 'e': /* --enable */
467
if(arg != NULL){
445
if (arg != NULL){
468
446
plugin *p = getplugin(arg);
469
447
if(p == NULL){
470
448
return ARGP_ERR_UNKNOWN;
477
455
plugindir = strdup(arg);
478
456
if(plugindir == NULL){
479
457
perror("strdup");
480
}
458
}
481
459
break;
482
460
case 129: /* --config-file */
483
461
/* This is already done by parse_opt_config_file() */
484
462
break;
485
463
case 130: /* --userid */
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
488
if(errno != 0 or tmp == arg or *tmp != '\0'
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
494
}
464
uid = (uid_t)strtol(arg, NULL, 10);
495
465
break;
496
466
case 131: /* --groupid */
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
499
if(errno != 0 or tmp == arg or *tmp != '\0'
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
505
}
467
gid = (gid_t)strtol(arg, NULL, 10);
506
468
break;
507
469
case 132: /* --debug */
508
470
debug = true;
509
471
break;
510
/*
511
* When adding more options before this line, remember to also add a
512
* "case" to the "parse_opt_config_file" function below.
513
*/
514
472
case ARGP_KEY_ARG:
515
473
/* Cryptsetup always passes an argument, which is an empty
516
474
string if "none" was specified in /etc/crypttab. So if
529
487
530
488
/* This option parser is the same as parse_opt() above, except it
531
489
ignores everything but the --config-file option. */
532
error_t parse_opt_config_file(int key, char *arg,
533
__attribute__((unused))
534
struct argp_state *state){
535
switch(key){
490
error_t parse_opt_config_file (int key, char *arg,
491
__attribute__((unused))
492
struct argp_state *state) {
493
switch (key) {
536
494
case 'g': /* --global-options */
537
495
case 'G': /* --global-env */
538
496
case 'o': /* --options-for */
547
505
if(argfile == NULL){
548
506
perror("strdup");
549
507
}
550
break;
508
break;
551
509
case 130: /* --userid */
552
510
case 131: /* --groupid */
553
511
case 132: /* --debug */
565
523
.args_doc = "",
566
524
.doc = "Mandos plugin runner -- Run plugins" };
567
525
568
/* Parse using parse_opt_config_file() in order to get the custom
526
/* Parse using the parse_opt_config_file in order to get the custom
569
527
config file location, if any. */
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
528
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
529
if (ret == ARGP_ERR_UNKNOWN){
572
530
fprintf(stderr, "Unknown error while parsing arguments\n");
573
531
exitstatus = EXIT_FAILURE;
574
532
goto fallback;
578
536
argp.parser = parse_opt;
579
537
580
538
/* Open the configfile if available */
581
if(argfile == NULL){
539
if (argfile == NULL){
582
540
conffp = fopen(AFILE, "r");
583
541
} else {
584
542
conffp = fopen(argfile, "r");
585
}
543
}
586
544
if(conffp != NULL){
587
545
char *org_line = NULL;
588
546
char *p, *arg, *new_arg, *line;
589
547
size_t size = 0;
548
ssize_t sret;
590
549
const char whitespace_delims[] = " \r\t\f\v\n";
591
550
const char comment_delim[] = "#";
592
551
593
552
custom_argc = 1;
594
553
custom_argv = malloc(sizeof(char*) * 2);
595
554
if(custom_argv == NULL){
599
558
}
600
559
custom_argv[0] = argv[0];
601
560
custom_argv[1] = NULL;
602
561
603
562
/* for each line in the config file, strip whitespace and ignore
604
563
commented text */
605
564
while(true){
607
566
if(sret == -1){
608
567
break;
609
568
}
610
569
611
570
line = org_line;
612
571
arg = strsep(&line, comment_delim);
613
572
while((p = strsep(&arg, whitespace_delims)) != NULL){
632
591
goto fallback;
633
592
}
634
593
custom_argv[custom_argc-1] = new_arg;
635
custom_argv[custom_argc] = NULL;
594
custom_argv[custom_argc] = NULL;
636
595
}
637
596
}
638
do {
639
ret = fclose(conffp);
640
} while(ret == EOF and errno == EINTR);
641
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
644
goto fallback;
645
}
646
597
free(org_line);
647
598
} else {
648
599
/* Check for harmful errors and go to fallback. Other errors might
649
600
not affect opening plugins */
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
601
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
651
602
perror("fopen");
652
603
exitstatus = EXIT_FAILURE;
653
604
goto fallback;
656
607
/* If there was any arguments from configuration file,
657
608
pass them to parser as command arguments */
658
609
if(custom_argv != NULL){
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
660
0, NULL);
661
if(ret == ARGP_ERR_UNKNOWN){
610
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
611
0, NULL);
612
if (ret == ARGP_ERR_UNKNOWN){
662
613
fprintf(stderr, "Unknown error while parsing arguments\n");
663
614
exitstatus = EXIT_FAILURE;
664
615
goto fallback;
667
618
668
619
/* Parse actual command line arguments, to let them override the
669
620
config file */
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
621
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
622
if (ret == ARGP_ERR_UNKNOWN){
672
623
fprintf(stderr, "Unknown error while parsing arguments\n");
673
624
exitstatus = EXIT_FAILURE;
674
625
goto fallback;
681
632
for(char **a = p->argv; *a != NULL; a++){
682
633
fprintf(stderr, "\tArg: %s\n", *a);
683
634
}
684
fprintf(stderr, "...and %d environment variables\n", p->envc);
635
fprintf(stderr, "...and %u environment variables\n", p->envc);
685
636
for(char **a = p->environ; *a != NULL; a++){
686
637
fprintf(stderr, "\t%s\n", *a);
687
638
}
689
640
}
690
641
691
642
/* Strip permissions down to nobody */
643
ret = setuid(uid);
644
if (ret == -1){
645
perror("setuid");
646
}
692
647
setgid(gid);
693
if(ret == -1){
648
if (ret == -1){
694
649
perror("setgid");
695
650
}
696
ret = setuid(uid);
697
if(ret == -1){
698
perror("setuid");
699
}
700
651
701
if(plugindir == NULL){
652
if (plugindir == NULL){
702
653
dir = opendir(PDIR);
703
654
} else {
704
655
dir = opendir(plugindir);
727
678
728
679
/* Read and execute any executable in the plugin directory*/
729
680
while(true){
730
do {
731
dirst = readdir(dir);
732
} while(dirst == NULL and errno == EINTR);
681
dirst = readdir(dir);
733
682
734
683
/* All directory entries have been processed */
735
684
if(dirst == NULL){
736
if(errno == EBADF){
685
if (errno == EBADF){
737
686
perror("readdir");
738
687
exitstatus = EXIT_FAILURE;
739
688
goto fallback;
751
700
752
701
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
753
702
".dpkg-old",
754
".dpkg-bak",
755
703
".dpkg-divert", NULL };
756
704
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
757
705
size_t pre_len = strlen(*pre);
771
719
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
772
720
size_t suf_len = strlen(*suf);
773
721
if((d_name_len >= suf_len)
774
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
722
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
775
723
== 0)){
776
724
if(debug){
777
725
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
786
734
continue;
787
735
}
788
736
}
789
737
790
738
char *filename;
791
739
if(plugindir == NULL){
792
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
793
dirst->d_name));
740
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
794
741
} else {
795
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
796
plugindir,
797
dirst->d_name));
742
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
798
743
}
799
744
if(ret < 0){
800
745
perror("asprintf");
801
746
continue;
802
747
}
803
748
804
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
805
if(ret == -1){
749
ret = stat(filename, &st);
750
if (ret == -1){
806
751
perror("stat");
807
752
free(filename);
808
753
continue;
809
754
}
810
755
811
756
/* Ignore non-executable files */
812
if(not S_ISREG(st.st_mode)
813
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
757
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
814
758
if(debug){
815
759
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
816
760
" with bad type or mode\n", filename);
862
806
}
863
807
864
808
int pipefd[2];
865
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
866
if(ret == -1){
809
ret = pipe(pipefd);
810
if (ret == -1){
867
811
perror("pipe");
868
812
exitstatus = EXIT_FAILURE;
869
813
goto fallback;
882
826
goto fallback;
883
827
}
884
828
/* Block SIGCHLD until process is safely in process list */
885
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
886
&sigchld_action.sa_mask,
887
NULL));
829
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
888
830
if(ret < 0){
889
831
perror("sigprocmask");
890
832
exitstatus = EXIT_FAILURE;
891
833
goto fallback;
892
834
}
893
835
/* Starting a new process to be watched */
894
pid_t pid;
895
do {
896
pid = fork();
897
} while(pid == -1 and errno == EINTR);
836
pid_t pid = fork();
898
837
if(pid == -1){
899
838
perror("fork");
900
839
exitstatus = EXIT_FAILURE;
907
846
perror("sigaction");
908
847
_exit(EXIT_FAILURE);
909
848
}
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
849
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
911
850
if(ret < 0){
912
851
perror("sigprocmask");
913
852
_exit(EXIT_FAILURE);
914
853
}
915
854
916
855
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
917
856
if(ret == -1){
918
857
perror("dup2");
938
877
/* no return */
939
878
}
940
879
/* Parent process */
941
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
942
pipe */
880
close(pipefd[1]); /* Close unused write end of pipe */
943
881
free(filename);
944
882
plugin *new_plugin = getplugin(dirst->d_name);
945
if(new_plugin == NULL){
883
if (new_plugin == NULL){
946
884
perror("getplugin");
947
ret = (int)(TEMP_FAILURE_RETRY
948
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
949
NULL)));
885
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
950
886
if(ret < 0){
951
887
perror("sigprocmask");
952
888
}
959
895
960
896
/* Unblock SIGCHLD so signal handler can be run if this process
961
897
has already completed */
962
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
963
&sigchld_action.sa_mask,
964
NULL));
898
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
965
899
if(ret < 0){
966
900
perror("sigprocmask");
967
901
exitstatus = EXIT_FAILURE;
968
902
goto fallback;
969
903
}
970
904
971
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
972
-Wconversion */
905
FD_SET(new_plugin->fd, &rfds_all);
973
906
974
if(maxfd < new_plugin->fd){
907
if (maxfd < new_plugin->fd){
975
908
maxfd = new_plugin->fd;
976
909
}
910
977
911
}
978
912
979
TEMP_FAILURE_RETRY(closedir(dir));
913
closedir(dir);
980
914
dir = NULL;
981
free_plugin(getplugin(NULL));
982
915
983
916
for(plugin *p = plugin_list; p != NULL; p = p->next){
984
917
if(p->pid != 0){
985
918
break;
990
923
free_plugin_list();
991
924
}
992
925
}
993
926
994
927
/* Main loop while running plugins exist */
995
928
while(plugin_list){
996
929
fd_set rfds = rfds_all;
997
930
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
998
if(select_ret == -1 and errno != EINTR){
931
if (select_ret == -1){
999
932
perror("select");
1000
933
exitstatus = EXIT_FAILURE;
1001
934
goto fallback;
1004
937
from one of them */
1005
938
for(plugin *proc = plugin_list; proc != NULL;){
1006
939
/* Is this process completely done? */
1007
if(proc->completed and proc->eof){
940
if(proc->eof and proc->completed){
1008
941
/* Only accept the plugin output if it exited cleanly */
1009
942
if(not WIFEXITED(proc->status)
1010
943
or WEXITSTATUS(proc->status) != 0){
1011
944
/* Bad exit by plugin */
1012
945
1013
946
if(debug){
1014
947
if(WIFEXITED(proc->status)){
1015
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1016
" status %d\n", proc->name,
1017
(intmax_t) (proc->pid),
948
fprintf(stderr, "Plugin %u exited with status %d\n",
949
(unsigned int) (proc->pid),
1018
950
WEXITSTATUS(proc->status));
1019
} else if(WIFSIGNALED(proc->status)){
1020
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1021
" signal %d: %s\n", proc->name,
1022
(intmax_t) (proc->pid),
1023
WTERMSIG(proc->status),
1024
strsignal(WTERMSIG(proc->status)));
951
} else if(WIFSIGNALED(proc->status)) {
952
fprintf(stderr, "Plugin %u killed by signal %d\n",
953
(unsigned int) (proc->pid),
954
WTERMSIG(proc->status));
1025
955
} else if(WCOREDUMP(proc->status)){
1026
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1027
" core\n", proc->name, (intmax_t) (proc->pid));
956
fprintf(stderr, "Plugin %d dumped core\n",
957
(unsigned int) (proc->pid));
1028
958
}
1029
959
}
1030
960
1031
961
/* Remove the plugin */
1032
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1033
-Wconversion */
1034
962
FD_CLR(proc->fd, &rfds_all);
963
1035
964
/* Block signal while modifying process_list */
1036
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1037
(SIG_BLOCK,
1038
&sigchld_action.sa_mask,
1039
NULL));
1040
if(ret < 0){
1041
perror("sigprocmask");
1042
exitstatus = EXIT_FAILURE;
1043
goto fallback;
965
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
966
if(ret < 0){
967
perror("sigprocmask");
968
exitstatus = EXIT_FAILURE;
969
goto fallback;
970
}
971
972
/* We are done modifying process list, so unblock signal */
973
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
974
NULL);
975
if(ret < 0){
976
perror("sigprocmask");
977
exitstatus = EXIT_FAILURE;
978
goto fallback;
979
}
980
981
if(plugin_list == NULL){
982
break;
1044
983
}
1045
984
1046
985
plugin *next_plugin = proc->next;
1047
986
free_plugin(proc);
1048
987
proc = next_plugin;
1049
1050
/* We are done modifying process list, so unblock signal */
1051
ret = (int)(TEMP_FAILURE_RETRY
1052
(sigprocmask(SIG_UNBLOCK,
1053
&sigchld_action.sa_mask, NULL)));
1054
if(ret < 0){
1055
perror("sigprocmask");
1056
exitstatus = EXIT_FAILURE;
1057
goto fallback;
1058
}
1059
1060
if(plugin_list == NULL){
1061
break;
1062
}
1063
1064
988
continue;
1065
989
}
1066
990
1067
991
/* This process exited nicely, so print its buffer */
1068
992
1069
993
bool bret = print_out_password(proc->buffer,
1070
994
proc->buffer_length);
1071
995
if(not bret){
1076
1000
}
1077
1001
1078
1002
/* This process has not completed. Does it have any output? */
1079
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1080
warning from
1081
-Wconversion */
1003
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1082
1004
/* This process had nothing to say at this time */
1083
1005
proc = proc->next;
1084
1006
continue;
1087
1009
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1088
1010
proc->buffer = realloc(proc->buffer, proc->buffer_size
1089
1011
+ (size_t) BUFFER_SIZE);
1090
if(proc->buffer == NULL){
1012
if (proc->buffer == NULL){
1091
1013
perror("malloc");
1092
1014
exitstatus = EXIT_FAILURE;
1093
1015
goto fallback;
1095
1017
proc->buffer_size += BUFFER_SIZE;
1096
1018
}
1097
1019
/* Read from the process */
1098
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1099
proc->buffer
1100
+ proc->buffer_length,
1101
BUFFER_SIZE));
1102
if(sret < 0){
1020
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1021
BUFFER_SIZE);
1022
if(ret < 0){
1103
1023
/* Read error from this process; ignore the error */
1104
1024
proc = proc->next;
1105
1025
continue;
1106
1026
}
1107
if(sret == 0){
1027
if(ret == 0){
1108
1028
/* got EOF */
1109
1029
proc->eof = true;
1110
1030
} else {
1111
proc->buffer_length += (size_t) sret;
1031
proc->buffer_length += (size_t) ret;
1112
1032
}
1113
1033
}
1114
1034
}
1115
1116
1035
1036
1117
1037
fallback:
1118
1038
1119
1039
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1141
1061
perror("sigaction");
1142
1062
exitstatus = EXIT_FAILURE;
1143
1063
}
1144
1064
1145
1065
if(custom_argv != NULL){
1146
1066
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1147
1067
free(*arg);
1153
1073
closedir(dir);
1154
1074
}
1155
1075
1156
/* Kill the processes */
1076
/* Free the process list and kill the processes */
1157
1077
for(plugin *p = plugin_list; p != NULL; p = p->next){
1158
1078
if(p->pid != 0){
1159
1079
close(p->fd);
1166
1086
}
1167
1087
1168
1088
/* Wait for any remaining child processes to terminate */
1169
do {
1089
do{
1170
1090
ret = wait(NULL);
1171
1091
} while(ret >= 0);
1172
1092
if(errno != ECHILD){
1173
1093
perror("wait");
1174
1094
}
1175
1095
1176
1096
free_plugin_list();
1177
1097
1178
1098
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0