To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 93
- compare with another revision
- download diff
- download tarball
- view history from revision 93
- Committer: Teddy Hogeborn
- Date: 2008-08-20 03:22:45 UTC
- Revision ID: teddy@fukt.bsnet.se-20080820032245-ue341vdvzqdsg68l
* mandos (string_to_delta): Accept a whitespace-separated sequence of
intervals and return the sum. This allows
"5m 30s" to be valid.
(main): Provide an empty default value for the "host" option for
"clients.conf", making it no longer a required option.
* mandos-clients.conf.xml: Removed <?xml-stylesheet>.
(DESCRIPTION): Improved text.
(DEFAULTS): Renamed to "OPTIONS". Improved text for "timeout" and
"interval".
(CLIENTS): Removed; content moved to "OPTIONS".
(EXPANSION): New section; document %(foo)s and %%(foo)s expansion.
(FILES): Moved to before "EXAMPLES".
(BUGS): New section.
(EXAMPLES): Renamed to "EXAMPLE", as per man-pages(7). Renamed
example section "example_client" to "foo". Changed
example "host" setting to a more reasonable example host
name. Added additional example client "bar".
* mandos-conf.xml: Removed OVERVIEW entity.
intervals and return the sum. This allows
"5m 30s" to be valid.
(main): Provide an empty default value for the "host" option for
"clients.conf", making it no longer a required option.
* mandos-clients.conf.xml: Removed <?xml-stylesheet>.
(DESCRIPTION): Improved text.
(DEFAULTS): Renamed to "OPTIONS". Improved text for "timeout" and
"interval".
(CLIENTS): Removed; content moved to "OPTIONS".
(EXPANSION): New section; document %(foo)s and %%(foo)s expansion.
(FILES): Moved to before "EXAMPLES".
(BUGS): New section.
(EXAMPLES): Renamed to "EXAMPLE", as per man-pages(7). Renamed
example section "example_client" to "foo". Changed
example "host" setting to a more reasonable example host
name. Added additional example client "bar".
* mandos-conf.xml: Removed OVERVIEW entity.
- files removed:
- .bzrignore
- files modified:
- Makefile
added
removed
plugin-runner.c
56
56
#include <argp.h> /* struct argp_option, struct
57
57
argp_state, struct argp,
58
58
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG,
60
error_t */
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
61
60
#include <signal.h> /* struct sigaction, sigemptyset(),
62
61
sigaddset(), sigaction(),
63
62
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
64
#include <errno.h> /* errno, EBADF */
66
65
67
66
#define BUFFER_SIZE 256
68
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
68
72
69
const char *argp_program_version = "plugin-runner 1.0";
73
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
71
75
struct plugin;
72
struct process;
73
74
typedef struct process{
75
pid_t pid;
76
int fd;
77
char *buffer;
78
size_t buffer_size;
79
size_t buffer_length;
80
bool eof;
81
bool completed;
82
int status;
83
struct process *next;
84
} process;
76
85
77
86
typedef struct plugin{
78
87
char *name; /* can be NULL or any plugin name */
81
90
char **environ;
82
91
int envc;
83
92
bool disabled;
84
85
/* Variables used for running processes*/
86
pid_t pid;
87
int fd;
88
char *buffer;
89
size_t buffer_size;
90
size_t buffer_length;
91
bool eof;
92
volatile bool completed;
93
volatile int status;
94
93
struct plugin *next;
95
94
} plugin;
96
95
97
static plugin *plugin_list = NULL;
98
99
/* Gets a existing plugin based on name,
100
or if none is found, creates a new one */
101
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
96
static plugin *getplugin(char *name, plugin **plugin_list){
97
for (plugin *p = *plugin_list; p != NULL; p = p->next){
104
98
if ((p->name == name)
105
99
or (p->name and name and (strcmp(p->name, name) == 0))){
106
100
return p;
111
105
if (new_plugin == NULL){
112
106
return NULL;
113
107
}
114
char *copy_name = NULL;
115
if(name != NULL){
116
copy_name = strdup(name);
117
if(copy_name == NULL){
118
return NULL;
119
}
108
char *copy_name = strdup(name);
109
if(copy_name == NULL){
110
return NULL;
120
111
}
121
112
122
113
*new_plugin = (plugin) { .name = copy_name,
123
114
.argc = 1,
115
.envc = 0,
124
116
.disabled = false,
125
.next = plugin_list };
117
.next = *plugin_list };
126
118
127
119
new_plugin->argv = malloc(sizeof(char *) * 2);
128
120
if (new_plugin->argv == NULL){
129
free(copy_name);
130
121
free(new_plugin);
131
122
return NULL;
132
123
}
135
126
136
127
new_plugin->environ = malloc(sizeof(char *));
137
128
if(new_plugin->environ == NULL){
138
free(copy_name);
139
129
free(new_plugin->argv);
140
130
free(new_plugin);
141
131
return NULL;
142
132
}
143
133
new_plugin->environ[0] = NULL;
144
145
134
/* Append the new plugin to the list */
146
plugin_list = new_plugin;
135
*plugin_list = new_plugin;
147
136
return new_plugin;
148
137
}
149
138
186
175
return add_to_char_array(def, &(p->environ), &(p->envc));
187
176
}
188
177
178
189
179
/*
190
180
* Based on the example in the GNU LibC manual chapter 13.13 "File
191
181
* Descriptor Flags".
202
192
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
203
193
}
204
194
195
process *process_list = NULL;
205
196
206
/* Mark processes as completed when they exit, and save their exit
197
/* Mark a process as completed when it exits, and save its exit
207
198
status. */
208
199
void handle_sigchld(__attribute__((unused)) int sig){
209
while(true){
210
plugin *proc = plugin_list;
211
int status;
212
pid_t pid = waitpid(-1, &status, WNOHANG);
213
if(pid == 0){
214
/* Only still running child processes */
215
break;
216
}
217
if(pid == -1){
218
if (errno != ECHILD){
219
perror("waitpid");
220
}
221
/* No child processes */
222
break;
223
}
224
225
/* A child exited, find it in process_list */
226
while(proc != NULL and proc->pid != pid){
227
proc = proc->next;
228
}
229
if(proc == NULL){
230
/* Process not found in process list */
231
continue;
232
}
233
proc->status = status;
234
proc->completed = true;
235
}
200
process *proc = process_list;
201
int status;
202
pid_t pid = wait(&status);
203
if(pid == -1){
204
perror("wait");
205
return;
206
}
207
while(proc != NULL and proc->pid != pid){
208
proc = proc->next;
209
}
210
if(proc == NULL){
211
/* Process not found in process list */
212
return;
213
}
214
proc->status = status;
215
proc->completed = true;
236
216
}
237
217
238
/* Prints out a password to stdout */
239
218
bool print_out_password(const char *buffer, size_t length){
240
219
ssize_t ret;
241
220
if(length>0 and buffer[length-1] == '\n'){
251
230
return true;
252
231
}
253
232
254
/* Removes and free a plugin from the plugin list */
255
static void free_plugin(plugin *plugin_node){
256
257
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
258
free(*arg);
259
}
260
free(plugin_node->argv);
261
for(char **env = plugin_node->environ; *env != NULL; env++){
262
free(*env);
263
}
264
free(plugin_node->environ);
265
free(plugin_node->buffer);
266
267
/* Removes the plugin from the singly-linked list */
268
if(plugin_node == plugin_list){
269
/* First one - simple */
270
plugin_list = plugin_list->next;
271
} else {
272
/* Second one or later */
273
for(plugin *p = plugin_list; p != NULL; p = p->next){
274
if(p->next == plugin_node){
275
p->next = plugin_node->next;
276
break;
277
}
233
char **add_to_argv(char **argv, int *argc, char *arg){
234
if (argv == NULL){
235
*argc = 1;
236
argv = malloc(sizeof(char*) * 2);
237
if(argv == NULL){
238
return NULL;
278
239
}
279
}
280
281
free(plugin_node);
240
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
241
argv[1] = NULL;
242
}
243
*argc += 1;
244
argv = realloc(argv, sizeof(char *)
245
* ((unsigned int) *argc + 1));
246
if(argv == NULL){
247
return NULL;
248
}
249
argv[*argc-1] = arg;
250
argv[*argc] = NULL;
251
return argv;
282
252
}
283
253
284
static void free_plugin_list(void){
285
while(plugin_list != NULL){
286
free_plugin(plugin_list);
287
}
254
static void free_plugin_list(plugin *plugin_list){
255
for(plugin *next = plugin_list; plugin_list != NULL; plugin_list = next){
256
next = plugin_list->next;
257
free(plugin_list->name);
258
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
259
free(*arg);
260
}
261
free(plugin_list->argv);
262
for(char **env = plugin_list->environ; *env != NULL; env++){
263
free(*env);
264
}
265
free(plugin_list->environ);
266
free(plugin_list);
267
}
288
268
}
289
269
290
270
int main(int argc, char *argv[]){
291
char *plugindir = NULL;
292
char *argfile = NULL;
271
const char *plugindir = "/lib/mandos/plugins.d";
272
const char *argfile = ARGFILE;
293
273
FILE *conffp;
294
274
size_t d_name_len;
295
275
DIR *dir = NULL;
318
298
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
319
299
if(ret == -1){
320
300
perror("sigaction");
321
exitstatus = EXIT_FAILURE;
301
exitstatus = EXIT_FAILURE;
322
302
goto fallback;
323
303
}
324
304
342
322
{ .name = "plugin-dir", .key = 128,
343
323
.arg = "DIRECTORY",
344
324
.doc = "Specify a different plugin directory", .group = 2 },
345
{ .name = "config-file", .key = 129,
346
.arg = "FILE",
347
.doc = "Specify a different configuration file", .group = 2 },
348
{ .name = "userid", .key = 130,
349
.arg = "ID", .flags = 0,
350
.doc = "User ID the plugins will run as", .group = 3 },
351
{ .name = "groupid", .key = 131,
352
.arg = "ID", .flags = 0,
353
.doc = "Group ID the plugins will run as", .group = 3 },
354
{ .name = "debug", .key = 132,
355
.doc = "Debug mode", .group = 4 },
325
{ .name = "userid", .key = 129,
326
.arg = "ID", .flags = 0,
327
.doc = "User ID the plugins will run as", .group = 2 },
328
{ .name = "groupid", .key = 130,
329
.arg = "ID", .flags = 0,
330
.doc = "Group ID the plugins will run as", .group = 2 },
331
{ .name = "debug", .key = 131,
332
.doc = "Debug mode", .group = 3 },
356
333
{ .name = NULL }
357
334
};
358
335
359
error_t parse_opt (int key, char *arg, __attribute__((unused)) struct argp_state *state) {
336
error_t parse_opt (int key, char *arg, struct argp_state *state) {
360
337
/* Get the INPUT argument from `argp_parse', which we know is a
361
338
pointer to our plugin list pointer. */
339
plugin **plugins = state->input;
362
340
switch (key) {
363
case 'g': /* --global-options */
341
case 'g':
364
342
if (arg != NULL){
365
343
char *p;
366
344
while((p = strsep(&arg, ",")) != NULL){
367
345
if(p[0] == '\0'){
368
346
continue;
369
347
}
370
if(not add_argument(getplugin(NULL), p)){
348
if(not add_argument(getplugin(NULL, plugins), p)){
371
349
perror("add_argument");
372
350
return ARGP_ERR_UNKNOWN;
373
351
}
374
352
}
375
353
}
376
354
break;
377
case 'e': /* --global-envs */
355
case 'e':
378
356
if(arg == NULL){
379
357
break;
380
358
}
383
361
if(envdef == NULL){
384
362
break;
385
363
}
386
if(not add_environment(getplugin(NULL), envdef)){
364
if(not add_environment(getplugin(NULL, plugins), envdef)){
387
365
perror("add_environment");
388
366
}
389
367
}
390
368
break;
391
case 'o': /* --options-for */
369
case 'o':
392
370
if (arg != NULL){
393
371
char *p_name = strsep(&arg, ":");
394
372
if(p_name[0] == '\0'){
404
382
if(p[0] == '\0'){
405
383
continue;
406
384
}
407
if(not add_argument(getplugin(p_name), p)){
385
if(not add_argument(getplugin(p_name, plugins), p)){
408
386
perror("add_argument");
409
387
return ARGP_ERR_UNKNOWN;
410
388
}
412
390
}
413
391
}
414
392
break;
415
case 'f': /* --envs-for */
393
case 'f':
416
394
if(arg == NULL){
417
395
break;
418
396
}
426
404
break;
427
405
}
428
406
envdef++;
429
if(not add_environment(getplugin(p_name), envdef)){
407
if(not add_environment(getplugin(p_name, plugins), envdef)){
430
408
perror("add_environment");
431
409
}
432
410
}
433
411
break;
434
case 'd': /* --disable */
412
case 'd':
435
413
if (arg != NULL){
436
plugin *p = getplugin(arg);
414
plugin *p = getplugin(arg, plugins);
437
415
if(p == NULL){
438
416
return ARGP_ERR_UNKNOWN;
439
417
}
440
418
p->disabled = true;
441
419
}
442
420
break;
443
case 128: /* --plugin-dir */
444
plugindir = strdup(arg);
445
if(plugindir == NULL){
446
perror("strdup");
447
}
421
case 128:
422
plugindir = arg;
448
423
break;
449
case 129: /* --config-file */
450
argfile = strdup(arg);
451
if(argfile == NULL){
452
perror("strdup");
453
}
454
break;
455
case 130: /* --userid */
424
case 129:
456
425
uid = (uid_t)strtol(arg, NULL, 10);
457
426
break;
458
case 131: /* --groupid */
427
case 130:
459
428
gid = (gid_t)strtol(arg, NULL, 10);
460
429
break;
461
case 132: /* --debug */
430
case 131:
462
431
debug = true;
463
432
break;
464
433
case ARGP_KEY_ARG:
472
441
return 0;
473
442
}
474
443
444
plugin *plugin_list = NULL;
445
475
446
struct argp argp = { .options = options, .parser = parse_opt,
476
447
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
477
448
.doc = "Mandos plugin runner -- Run plugins" };
478
449
479
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
450
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
480
451
if (ret == ARGP_ERR_UNKNOWN){
481
452
fprintf(stderr, "Unknown error while parsing arguments\n");
482
453
exitstatus = EXIT_FAILURE;
483
454
goto fallback;
484
455
}
485
456
486
/* Opens the configfile if aviable */
487
if (argfile == NULL){
488
conffp = fopen(AFILE, "r");
489
} else {
490
conffp = fopen(argfile, "r");
491
}
457
conffp = fopen(argfile, "r");
492
458
if(conffp != NULL){
493
459
char *org_line = NULL;
494
460
char *p, *arg, *new_arg, *line;
497
463
const char whitespace_delims[] = " \r\t\f\v\n";
498
464
const char comment_delim[] = "#";
499
465
500
custom_argc = 1;
501
custom_argv = malloc(sizeof(char*) * 2);
502
if(custom_argv == NULL){
503
perror("malloc");
504
exitstatus = EXIT_FAILURE;
505
goto fallback;
506
}
507
custom_argv[0] = argv[0];
508
custom_argv[1] = NULL;
509
510
/* for each line in the config file, strip whitespace and ignore commented text */
511
466
while(true){
512
467
sret = getline(&org_line, &size, conffp);
513
468
if(sret == -1){
521
476
continue;
522
477
}
523
478
new_arg = strdup(p);
524
if(new_arg == NULL){
525
perror("strdup");
526
exitstatus = EXIT_FAILURE;
527
free(org_line);
528
goto fallback;
529
}
530
531
custom_argc += 1;
532
custom_argv = realloc(custom_argv, sizeof(char *)
533
* ((unsigned int) custom_argc + 1));
534
if(custom_argv == NULL){
535
perror("realloc");
536
exitstatus = EXIT_FAILURE;
537
free(org_line);
538
goto fallback;
539
}
540
custom_argv[custom_argc-1] = new_arg;
541
custom_argv[custom_argc] = NULL;
479
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
480
if (custom_argv == NULL){
481
perror("add_to_argv");
482
exitstatus = EXIT_FAILURE;
483
goto fallback;
484
}
542
485
}
543
486
}
544
487
free(org_line);
551
494
goto fallback;
552
495
}
553
496
}
554
/* If there was any arguments from configuration file,
555
pass them to parser as command arguments */
497
556
498
if(custom_argv != NULL){
557
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
499
custom_argv[0] = argv[0];
500
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
558
501
if (ret == ARGP_ERR_UNKNOWN){
559
502
fprintf(stderr, "Unknown error while parsing arguments\n");
560
503
exitstatus = EXIT_FAILURE;
575
518
}
576
519
}
577
520
}
578
579
/* Strip permissions down to nobody */
521
580
522
ret = setuid(uid);
581
523
if (ret == -1){
582
524
perror("setuid");
583
}
525
}
526
584
527
setgid(gid);
585
528
if (ret == -1){
586
529
perror("setgid");
587
530
}
588
589
if (plugindir == NULL){
590
dir = opendir(PDIR);
591
} else {
592
dir = opendir(plugindir);
593
}
594
531
532
dir = opendir(plugindir);
595
533
if(dir == NULL){
596
534
perror("Could not open plugin dir");
597
535
exitstatus = EXIT_FAILURE;
612
550
}
613
551
614
552
FD_ZERO(&rfds_all);
615
616
/* Read and execute any executable in the plugin directory*/
553
617
554
while(true){
618
555
dirst = readdir(dir);
619
556
650
587
break;
651
588
}
652
589
}
590
653
591
if(bad_name){
654
592
continue;
655
593
}
594
656
595
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
657
596
size_t suf_len = strlen(*suf);
658
597
if((d_name_len >= suf_len)
685
624
free(filename);
686
625
continue;
687
626
}
688
689
/* Ignore non-executable files */
627
690
628
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
691
629
if(debug){
692
630
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
695
633
free(filename);
696
634
continue;
697
635
}
698
699
plugin *p = getplugin(dirst->d_name);
636
plugin *p = getplugin(dirst->d_name, &plugin_list);
700
637
if(p == NULL){
701
638
perror("getplugin");
702
639
free(filename);
712
649
}
713
650
{
714
651
/* Add global arguments to argument list for this plugin */
715
plugin *g = getplugin(NULL);
652
plugin *g = getplugin(NULL, &plugin_list);
716
653
if(g != NULL){
717
654
for(char **a = g->argv + 1; *a != NULL; a++){
718
655
if(not add_argument(p, *a)){
743
680
}
744
681
}
745
682
746
int pipefd[2];
683
int pipefd[2];
747
684
ret = pipe(pipefd);
748
685
if (ret == -1){
749
686
perror("pipe");
750
687
exitstatus = EXIT_FAILURE;
751
688
goto fallback;
752
689
}
753
/* Ask OS to automatic close the pipe on exec */
754
690
ret = set_cloexec_flag(pipefd[0]);
755
691
if(ret < 0){
756
692
perror("set_cloexec_flag");
814
750
}
815
751
/* no return */
816
752
}
817
/* Parent process */
818
close(pipefd[1]); /* Close unused write end of pipe */
753
/* parent process */
819
754
free(filename);
820
plugin *new_plugin = getplugin(dirst->d_name);
821
if (new_plugin == NULL){
822
perror("getplugin");
755
close(pipefd[1]); /* close unused write end of pipe */
756
process *new_process = malloc(sizeof(process));
757
if (new_process == NULL){
758
perror("malloc");
823
759
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
824
760
if(ret < 0){
825
perror("sigprocmask");
761
perror("sigprocmask");
826
762
}
827
763
exitstatus = EXIT_FAILURE;
828
764
goto fallback;
829
765
}
830
766
831
new_plugin->pid = pid;
832
new_plugin->fd = pipefd[0];
833
767
*new_process = (struct process){ .pid = pid,
768
.fd = pipefd[0],
769
.next = process_list };
770
// List handling
771
process_list = new_process;
834
772
/* Unblock SIGCHLD so signal handler can be run if this process
835
773
has already completed */
836
774
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
840
778
goto fallback;
841
779
}
842
780
843
FD_SET(new_plugin->fd, &rfds_all);
781
FD_SET(new_process->fd, &rfds_all);
844
782
845
if (maxfd < new_plugin->fd){
846
maxfd = new_plugin->fd;
783
if (maxfd < new_process->fd){
784
maxfd = new_process->fd;
847
785
}
848
786
849
787
}
850
788
789
free_plugin_list(plugin_list);
790
851
791
closedir(dir);
852
792
dir = NULL;
853
854
for(plugin *p = plugin_list; p != NULL; p = p->next){
855
if(p->pid != 0){
856
break;
857
}
858
if(p->next == NULL){
859
fprintf(stderr, "No plugin processes started. Incorrect plugin"
860
" directory?\n");
861
free_plugin_list();
862
}
793
794
if (process_list == NULL){
795
fprintf(stderr, "No plugin processes started. Incorrect plugin"
796
" directory?\n");
797
process_list = NULL;
863
798
}
864
865
/* Main loop while running plugins exist */
866
while(plugin_list){
799
while(process_list){
867
800
fd_set rfds = rfds_all;
868
801
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
869
802
if (select_ret == -1){
873
806
}
874
807
/* OK, now either a process completed, or something can be read
875
808
from one of them */
876
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
809
for(process *proc = process_list; proc ; proc = proc->next){
877
810
/* Is this process completely done? */
878
811
if(proc->eof and proc->completed){
879
812
/* Only accept the plugin output if it exited cleanly */
880
813
if(not WIFEXITED(proc->status)
881
814
or WEXITSTATUS(proc->status) != 0){
882
815
/* Bad exit by plugin */
883
884
816
if(debug){
885
817
if(WIFEXITED(proc->status)){
886
818
fprintf(stderr, "Plugin %u exited with status %d\n",
895
827
(unsigned int) (proc->pid));
896
828
}
897
829
}
898
899
830
/* Remove the plugin */
900
831
FD_CLR(proc->fd, &rfds_all);
901
902
832
/* Block signal while modifying process_list */
903
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
833
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
904
834
if(ret < 0){
905
835
perror("sigprocmask");
906
836
exitstatus = EXIT_FAILURE;
907
837
goto fallback;
908
838
}
909
free_plugin(proc);
839
/* Delete this process entry from the list */
840
if(process_list == proc){
841
/* First one - simple */
842
process_list = proc->next;
843
} else {
844
/* Second one or later */
845
for(process *p = process_list; p != NULL; p = p->next){
846
if(p->next == proc){
847
p->next = proc->next;
848
break;
849
}
850
}
851
}
910
852
/* We are done modifying process list, so unblock signal */
911
853
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
912
854
NULL);
913
855
if(ret < 0){
914
856
perror("sigprocmask");
915
exitstatus = EXIT_FAILURE;
916
goto fallback;
917
}
918
919
if(plugin_list == NULL){
920
break;
921
}
922
continue;
857
}
858
free(proc->buffer);
859
free(proc);
860
/* We deleted this process from the list, so we can't go
861
proc->next. Therefore, start over from the beginning of
862
the process list */
863
break;
923
864
}
924
925
865
/* This process exited nicely, so print its buffer */
926
866
927
bool bret = print_out_password(proc->buffer,
928
proc->buffer_length);
867
bool bret = print_out_password(proc->buffer, proc->buffer_length);
929
868
if(not bret){
930
869
perror("print_out_password");
931
870
exitstatus = EXIT_FAILURE;
932
871
}
933
872
goto fallback;
934
873
}
935
936
874
/* This process has not completed. Does it have any output? */
937
875
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
938
876
/* This process had nothing to say at this time */
968
906
969
907
fallback:
970
908
971
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
972
/* Fallback if all plugins failed, none are found or an error
973
occured */
909
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
910
/* Fallback if all plugins failed, none are found or an error occured */
974
911
bool bret;
975
912
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
976
913
char *passwordbuffer = getpass("Password: ");
989
926
}
990
927
991
928
if(custom_argv != NULL){
992
for(char **arg = custom_argv+1; *arg != NULL; arg++){
929
for(char **arg = custom_argv; *arg != NULL; arg++){
993
930
free(*arg);
994
931
}
995
932
free(custom_argv);
996
933
}
934
free_plugin_list(plugin_list);
997
935
998
936
if(dir != NULL){
999
937
closedir(dir);
1000
938
}
1001
939
1002
940
/* Free the process list and kill the processes */
1003
for(plugin *p = plugin_list; p != NULL; p = p->next){
1004
if(p->pid != 0){
1005
close(p->fd);
1006
ret = kill(p->pid, SIGTERM);
1007
if(ret == -1 and errno != ESRCH){
1008
/* Set-uid proccesses might not get closed */
1009
perror("kill");
1010
}
941
for(process *next; process_list != NULL; process_list = next){
942
next = process_list->next;
943
close(process_list->fd);
944
ret = kill(process_list->pid, SIGTERM);
945
if(ret == -1 and errno != ESRCH){
946
/* set-uid proccesses migth not get closed */
947
perror("kill");
1011
948
}
949
free(process_list->buffer);
950
free(process_list);
1012
951
}
1013
952
1014
953
/* Wait for any remaining child processes to terminate */
1018
957
if(errno != ECHILD){
1019
958
perror("wait");
1020
959
}
1021
1022
free_plugin_list();
1023
1024
free(plugindir);
1025
free(argfile);
1026
960
1027
961
return exitstatus;
1028
962
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0