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- Committer: Teddy Hogeborn
- Date: 2008-08-31 20:01:03 UTC
- Revision ID: teddy@fukt.bsnet.se-20080831200103-wvjp5oagtxj7s25g
* plugin-runner.c: Break a couple of long lines.
- files added:
- .bzrignore
- files removed:
- network-protocol.txt
- 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, error_t */
59
ARGP_KEY_END, ARGP_KEY_ARG,
60
error_t */
60
61
#include <signal.h> /* struct sigaction, sigemptyset(),
61
62
sigaddset(), sigaction(),
62
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
65
#include <errno.h> /* errno, EBADF */
65
66
66
67
#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
71
69
72
const char *argp_program_version = "plugin-runner 1.0";
70
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
74
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;
75
struct plugin;
85
76
86
77
typedef struct plugin{
87
78
char *name; /* can be NULL or any plugin name */
90
81
char **environ;
91
82
int envc;
92
83
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;
93
94
struct plugin *next;
94
95
} plugin;
95
96
96
static plugin *getplugin(char *name, plugin **plugin_list){
97
for (plugin *p = *plugin_list; p != NULL; p = p->next){
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){
98
104
if ((p->name == name)
99
105
or (p->name and name and (strcmp(p->name, name) == 0))){
100
106
return p;
105
111
if (new_plugin == NULL){
106
112
return NULL;
107
113
}
108
*new_plugin = (plugin) { .name = name,
114
char *copy_name = NULL;
115
if(name != NULL){
116
copy_name = strdup(name);
117
if(copy_name == NULL){
118
return NULL;
119
}
120
}
121
122
*new_plugin = (plugin) { .name = copy_name,
109
123
.argc = 1,
110
.envc = 0,
111
124
.disabled = false,
112
.next = *plugin_list };
125
.next = plugin_list };
113
126
114
127
new_plugin->argv = malloc(sizeof(char *) * 2);
115
128
if (new_plugin->argv == NULL){
129
free(copy_name);
116
130
free(new_plugin);
117
131
return NULL;
118
132
}
119
new_plugin->argv[0] = name;
133
new_plugin->argv[0] = copy_name;
120
134
new_plugin->argv[1] = NULL;
121
135
122
136
new_plugin->environ = malloc(sizeof(char *));
123
137
if(new_plugin->environ == NULL){
138
free(copy_name);
124
139
free(new_plugin->argv);
125
140
free(new_plugin);
126
141
return NULL;
127
142
}
128
143
new_plugin->environ[0] = NULL;
144
129
145
/* Append the new plugin to the list */
130
*plugin_list = new_plugin;
146
plugin_list = new_plugin;
131
147
return new_plugin;
132
148
}
133
149
170
186
return add_to_char_array(def, &(p->environ), &(p->envc));
171
187
}
172
188
173
174
189
/*
175
190
* Based on the example in the GNU LibC manual chapter 13.13 "File
176
191
* Descriptor Flags".
187
202
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
188
203
}
189
204
190
process *process_list = NULL;
191
205
192
/* Mark a process as completed when it exits, and save its exit
206
/* Mark processes as completed when they exit, and save their exit
193
207
status. */
194
208
void handle_sigchld(__attribute__((unused)) int sig){
195
process *proc = process_list;
196
int status;
197
pid_t pid = wait(&status);
198
if(pid == -1){
199
perror("wait");
200
return;
201
}
202
while(proc != NULL and proc->pid != pid){
203
proc = proc->next;
204
}
205
if(proc == NULL){
206
/* Process not found in process list */
207
return;
208
}
209
proc->status = status;
210
proc->completed = true;
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
}
211
236
}
212
237
238
/* Prints out a password to stdout */
213
239
bool print_out_password(const char *buffer, size_t length){
214
240
ssize_t ret;
215
241
if(length>0 and buffer[length-1] == '\n'){
225
251
return true;
226
252
}
227
253
228
char **add_to_argv(char **argv, int *argc, char *arg){
229
if (argv == NULL){
230
*argc = 1;
231
argv = malloc(sizeof(char*) * 2);
232
if(argv == NULL){
233
return NULL;
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
}
234
278
}
235
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
236
argv[1] = NULL;
237
}
238
*argc += 1;
239
argv = realloc(argv, sizeof(char *)
240
* ((unsigned int) *argc + 1));
241
if(argv == NULL){
242
return NULL;
243
}
244
argv[*argc-1] = arg;
245
argv[*argc] = NULL;
246
return argv;
279
}
280
281
free(plugin_node);
282
}
283
284
static void free_plugin_list(void){
285
while(plugin_list != NULL){
286
free_plugin(plugin_list);
287
}
247
288
}
248
289
249
290
int main(int argc, char *argv[]){
250
const char *plugindir = "/lib/mandos/plugins.d";
251
const char *argfile = ARGFILE;
291
char *plugindir = NULL;
292
char *argfile = NULL;
252
293
FILE *conffp;
253
294
size_t d_name_len;
254
295
DIR *dir = NULL;
269
310
/* Establish a signal handler */
270
311
sigemptyset(&sigchld_action.sa_mask);
271
312
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
272
if(ret < 0){
313
if(ret == -1){
273
314
perror("sigaddset");
274
exit(EXIT_FAILURE);
315
exitstatus = EXIT_FAILURE;
316
goto fallback;
275
317
}
276
318
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
277
if(ret < 0){
319
if(ret == -1){
278
320
perror("sigaction");
279
exit(EXIT_FAILURE);
321
exitstatus = EXIT_FAILURE;
322
goto fallback;
280
323
}
281
324
282
325
/* The options we understand. */
299
342
{ .name = "plugin-dir", .key = 128,
300
343
.arg = "DIRECTORY",
301
344
.doc = "Specify a different plugin directory", .group = 2 },
302
{ .name = "userid", .key = 129,
303
.arg = "ID", .flags = 0,
304
.doc = "User ID the plugins will run as", .group = 2 },
305
{ .name = "groupid", .key = 130,
306
.arg = "ID", .flags = 0,
307
.doc = "Group ID the plugins will run as", .group = 2 },
308
{ .name = "debug", .key = 131,
309
.doc = "Debug mode", .group = 3 },
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 },
310
356
{ .name = NULL }
311
357
};
312
358
313
error_t parse_opt (int key, char *arg, struct argp_state *state) {
359
error_t parse_opt (int key, char *arg, __attribute__((unused))
360
struct argp_state *state) {
314
361
/* Get the INPUT argument from `argp_parse', which we know is a
315
362
pointer to our plugin list pointer. */
316
plugin **plugins = state->input;
317
363
switch (key) {
318
case 'g':
364
case 'g': /* --global-options */
319
365
if (arg != NULL){
320
366
char *p;
321
367
while((p = strsep(&arg, ",")) != NULL){
322
368
if(p[0] == '\0'){
323
369
continue;
324
370
}
325
if(not add_argument(getplugin(NULL, plugins), p)){
371
if(not add_argument(getplugin(NULL), p)){
326
372
perror("add_argument");
327
373
return ARGP_ERR_UNKNOWN;
328
374
}
329
375
}
330
376
}
331
377
break;
332
case 'e':
378
case 'e': /* --global-envs */
333
379
if(arg == NULL){
334
380
break;
335
381
}
338
384
if(envdef == NULL){
339
385
break;
340
386
}
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
387
if(not add_environment(getplugin(NULL), envdef)){
342
388
perror("add_environment");
343
389
}
344
390
}
345
391
break;
346
case 'o':
392
case 'o': /* --options-for */
347
393
if (arg != NULL){
348
394
char *p_name = strsep(&arg, ":");
349
395
if(p_name[0] == '\0'){
359
405
if(p[0] == '\0'){
360
406
continue;
361
407
}
362
if(not add_argument(getplugin(p_name, plugins), p)){
408
if(not add_argument(getplugin(p_name), p)){
363
409
perror("add_argument");
364
410
return ARGP_ERR_UNKNOWN;
365
411
}
367
413
}
368
414
}
369
415
break;
370
case 'f':
416
case 'f': /* --envs-for */
371
417
if(arg == NULL){
372
418
break;
373
419
}
381
427
break;
382
428
}
383
429
envdef++;
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
430
if(not add_environment(getplugin(p_name), envdef)){
385
431
perror("add_environment");
386
432
}
387
433
}
388
434
break;
389
case 'd':
435
case 'd': /* --disable */
390
436
if (arg != NULL){
391
plugin *p = getplugin(arg, plugins);
437
plugin *p = getplugin(arg);
392
438
if(p == NULL){
393
439
return ARGP_ERR_UNKNOWN;
394
440
}
395
441
p->disabled = true;
396
442
}
397
443
break;
398
case 128:
399
plugindir = arg;
444
case 128: /* --plugin-dir */
445
plugindir = strdup(arg);
446
if(plugindir == NULL){
447
perror("strdup");
448
}
400
449
break;
401
case 129:
450
case 129: /* --config-file */
451
argfile = strdup(arg);
452
if(argfile == NULL){
453
perror("strdup");
454
}
455
break;
456
case 130: /* --userid */
402
457
uid = (uid_t)strtol(arg, NULL, 10);
403
458
break;
404
case 130:
459
case 131: /* --groupid */
405
460
gid = (gid_t)strtol(arg, NULL, 10);
406
461
break;
407
case 131:
462
case 132: /* --debug */
408
463
debug = true;
409
464
break;
410
465
case ARGP_KEY_ARG:
418
473
return 0;
419
474
}
420
475
421
plugin *plugin_list = NULL;
422
423
476
struct argp argp = { .options = options, .parser = parse_opt,
424
477
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
425
478
.doc = "Mandos plugin runner -- Run plugins" };
426
479
427
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
480
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
428
481
if (ret == ARGP_ERR_UNKNOWN){
429
482
fprintf(stderr, "Unknown error while parsing arguments\n");
430
483
exitstatus = EXIT_FAILURE;
431
goto end;
484
goto fallback;
432
485
}
433
486
434
conffp = fopen(argfile, "r");
487
/* Opens the configfile if aviable */
488
if (argfile == NULL){
489
conffp = fopen(AFILE, "r");
490
} else {
491
conffp = fopen(argfile, "r");
492
}
435
493
if(conffp != NULL){
436
494
char *org_line = NULL;
495
char *p, *arg, *new_arg, *line;
437
496
size_t size = 0;
438
497
ssize_t sret;
439
char *p, *arg, *new_arg, *line;
440
498
const char whitespace_delims[] = " \r\t\f\v\n";
441
499
const char comment_delim[] = "#";
442
500
501
custom_argc = 1;
502
custom_argv = malloc(sizeof(char*) * 2);
503
if(custom_argv == NULL){
504
perror("malloc");
505
exitstatus = EXIT_FAILURE;
506
goto fallback;
507
}
508
custom_argv[0] = argv[0];
509
custom_argv[1] = NULL;
510
511
/* for each line in the config file, strip whitespace and ignore
512
commented text */
443
513
while(true){
444
514
sret = getline(&org_line, &size, conffp);
445
515
if(sret == -1){
453
523
continue;
454
524
}
455
525
new_arg = strdup(p);
456
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
457
if (custom_argv == NULL){
458
perror("add_to_argv");
459
exitstatus = EXIT_FAILURE;
460
goto end;
461
}
526
if(new_arg == NULL){
527
perror("strdup");
528
exitstatus = EXIT_FAILURE;
529
free(org_line);
530
goto fallback;
531
}
532
533
custom_argc += 1;
534
custom_argv = realloc(custom_argv, sizeof(char *)
535
* ((unsigned int) custom_argc + 1));
536
if(custom_argv == NULL){
537
perror("realloc");
538
exitstatus = EXIT_FAILURE;
539
free(org_line);
540
goto fallback;
541
}
542
custom_argv[custom_argc-1] = new_arg;
543
custom_argv[custom_argc] = NULL;
462
544
}
463
545
}
464
546
free(org_line);
468
550
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
469
551
perror("fopen");
470
552
exitstatus = EXIT_FAILURE;
471
goto end;
553
goto fallback;
472
554
}
473
555
}
474
556
/* If there was any arguments from configuration file,
557
pass them to parser as command arguments */
475
558
if(custom_argv != NULL){
476
custom_argv[0] = argv[0];
477
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
559
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
478
560
if (ret == ARGP_ERR_UNKNOWN){
479
561
fprintf(stderr, "Unknown error while parsing arguments\n");
480
562
exitstatus = EXIT_FAILURE;
481
goto end;
563
goto fallback;
482
564
}
483
565
}
484
566
495
577
}
496
578
}
497
579
}
498
580
581
/* Strip permissions down to nobody */
499
582
ret = setuid(uid);
500
583
if (ret == -1){
501
584
perror("setuid");
502
}
503
585
}
504
586
setgid(gid);
505
587
if (ret == -1){
506
588
perror("setgid");
507
589
}
590
591
if (plugindir == NULL){
592
dir = opendir(PDIR);
593
} else {
594
dir = opendir(plugindir);
595
}
508
596
509
dir = opendir(plugindir);
510
597
if(dir == NULL){
511
598
perror("Could not open plugin dir");
512
599
exitstatus = EXIT_FAILURE;
513
goto end;
600
goto fallback;
514
601
}
515
602
516
603
/* Set the FD_CLOEXEC flag on the directory, if possible */
521
608
if(ret < 0){
522
609
perror("set_cloexec_flag");
523
610
exitstatus = EXIT_FAILURE;
524
goto end;
611
goto fallback;
525
612
}
526
613
}
527
614
}
528
615
529
616
FD_ZERO(&rfds_all);
530
617
618
/* Read and execute any executable in the plugin directory*/
531
619
while(true){
532
620
dirst = readdir(dir);
533
621
536
624
if (errno == EBADF){
537
625
perror("readdir");
538
626
exitstatus = EXIT_FAILURE;
539
goto end;
627
goto fallback;
540
628
}
541
629
break;
542
630
}
564
652
break;
565
653
}
566
654
}
567
568
655
if(bad_name){
569
656
continue;
570
657
}
571
572
658
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
573
659
size_t suf_len = strlen(*suf);
574
660
if((d_name_len >= suf_len)
601
687
free(filename);
602
688
continue;
603
689
}
604
690
691
/* Ignore non-executable files */
605
692
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
606
693
if(debug){
607
694
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
610
697
free(filename);
611
698
continue;
612
699
}
613
plugin *p = getplugin(dirst->d_name, &plugin_list);
700
701
plugin *p = getplugin(dirst->d_name);
614
702
if(p == NULL){
615
703
perror("getplugin");
616
704
free(filename);
626
714
}
627
715
{
628
716
/* Add global arguments to argument list for this plugin */
629
plugin *g = getplugin(NULL, &plugin_list);
717
plugin *g = getplugin(NULL);
630
718
if(g != NULL){
631
719
for(char **a = g->argv + 1; *a != NULL; a++){
632
720
if(not add_argument(p, *a)){
657
745
}
658
746
}
659
747
660
int pipefd[2];
748
int pipefd[2];
661
749
ret = pipe(pipefd);
662
750
if (ret == -1){
663
751
perror("pipe");
664
752
exitstatus = EXIT_FAILURE;
665
goto end;
753
goto fallback;
666
754
}
755
/* Ask OS to automatic close the pipe on exec */
667
756
ret = set_cloexec_flag(pipefd[0]);
668
757
if(ret < 0){
669
758
perror("set_cloexec_flag");
670
759
exitstatus = EXIT_FAILURE;
671
goto end;
760
goto fallback;
672
761
}
673
762
ret = set_cloexec_flag(pipefd[1]);
674
763
if(ret < 0){
675
764
perror("set_cloexec_flag");
676
765
exitstatus = EXIT_FAILURE;
677
goto end;
766
goto fallback;
678
767
}
679
768
/* Block SIGCHLD until process is safely in process list */
680
769
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
681
770
if(ret < 0){
682
771
perror("sigprocmask");
683
772
exitstatus = EXIT_FAILURE;
684
goto end;
773
goto fallback;
685
774
}
686
775
// Starting a new process to be watched
687
776
pid_t pid = fork();
688
777
if(pid == -1){
689
778
perror("fork");
690
779
exitstatus = EXIT_FAILURE;
691
goto end;
780
goto fallback;
692
781
}
693
782
if(pid == 0){
694
783
/* this is the child process */
727
816
}
728
817
/* no return */
729
818
}
730
/* parent process */
819
/* Parent process */
820
close(pipefd[1]); /* Close unused write end of pipe */
731
821
free(filename);
732
close(pipefd[1]); /* close unused write end of pipe */
733
process *new_process = malloc(sizeof(process));
734
if (new_process == NULL){
735
perror("malloc");
822
plugin *new_plugin = getplugin(dirst->d_name);
823
if (new_plugin == NULL){
824
perror("getplugin");
736
825
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
737
826
if(ret < 0){
738
perror("sigprocmask");
827
perror("sigprocmask");
739
828
}
740
829
exitstatus = EXIT_FAILURE;
741
goto end;
830
goto fallback;
742
831
}
743
832
744
*new_process = (struct process){ .pid = pid,
745
.fd = pipefd[0],
746
.next = process_list };
747
// List handling
748
process_list = new_process;
833
new_plugin->pid = pid;
834
new_plugin->fd = pipefd[0];
835
749
836
/* Unblock SIGCHLD so signal handler can be run if this process
750
837
has already completed */
751
838
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
752
839
if(ret < 0){
753
840
perror("sigprocmask");
754
841
exitstatus = EXIT_FAILURE;
755
goto end;
756
}
757
758
FD_SET(new_process->fd, &rfds_all);
759
760
if (maxfd < new_process->fd){
761
maxfd = new_process->fd;
762
}
763
764
}
765
766
/* Free the plugin list */
767
for(plugin *next; plugin_list != NULL; plugin_list = next){
768
next = plugin_list->next;
769
free(plugin_list->argv);
770
if(plugin_list->environ[0] != NULL){
771
for(char **e = plugin_list->environ; *e != NULL; e++){
772
free(*e);
773
}
774
}
775
free(plugin_list);
842
goto fallback;
843
}
844
845
FD_SET(new_plugin->fd, &rfds_all);
846
847
if (maxfd < new_plugin->fd){
848
maxfd = new_plugin->fd;
849
}
850
776
851
}
777
852
778
853
closedir(dir);
779
854
dir = NULL;
780
781
if (process_list == NULL){
782
fprintf(stderr, "No plugin processes started. Incorrect plugin"
783
" directory?\n");
784
process_list = NULL;
855
856
for(plugin *p = plugin_list; p != NULL; p = p->next){
857
if(p->pid != 0){
858
break;
859
}
860
if(p->next == NULL){
861
fprintf(stderr, "No plugin processes started. Incorrect plugin"
862
" directory?\n");
863
free_plugin_list();
864
}
785
865
}
786
while(process_list){
866
867
/* Main loop while running plugins exist */
868
while(plugin_list){
787
869
fd_set rfds = rfds_all;
788
870
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
789
871
if (select_ret == -1){
790
872
perror("select");
791
873
exitstatus = EXIT_FAILURE;
792
goto end;
874
goto fallback;
793
875
}
794
876
/* OK, now either a process completed, or something can be read
795
877
from one of them */
796
for(process *proc = process_list; proc ; proc = proc->next){
878
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
797
879
/* Is this process completely done? */
798
880
if(proc->eof and proc->completed){
799
881
/* Only accept the plugin output if it exited cleanly */
800
882
if(not WIFEXITED(proc->status)
801
883
or WEXITSTATUS(proc->status) != 0){
802
884
/* Bad exit by plugin */
885
803
886
if(debug){
804
887
if(WIFEXITED(proc->status)){
805
888
fprintf(stderr, "Plugin %u exited with status %d\n",
814
897
(unsigned int) (proc->pid));
815
898
}
816
899
}
900
817
901
/* Remove the plugin */
818
902
FD_CLR(proc->fd, &rfds_all);
903
819
904
/* Block signal while modifying process_list */
820
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
905
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
821
906
if(ret < 0){
822
907
perror("sigprocmask");
823
908
exitstatus = EXIT_FAILURE;
824
goto end;
825
}
826
/* Delete this process entry from the list */
827
if(process_list == proc){
828
/* First one - simple */
829
process_list = proc->next;
830
} else {
831
/* Second one or later */
832
for(process *p = process_list; p != NULL; p = p->next){
833
if(p->next == proc){
834
p->next = proc->next;
835
break;
836
}
837
}
838
}
909
goto fallback;
910
}
911
free_plugin(proc);
839
912
/* We are done modifying process list, so unblock signal */
840
913
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
841
914
NULL);
842
915
if(ret < 0){
843
916
perror("sigprocmask");
844
}
845
free(proc->buffer);
846
free(proc);
847
/* We deleted this process from the list, so we can't go
848
proc->next. Therefore, start over from the beginning of
849
the process list */
850
break;
917
exitstatus = EXIT_FAILURE;
918
goto fallback;
919
}
920
921
if(plugin_list == NULL){
922
break;
923
}
924
continue;
851
925
}
926
852
927
/* This process exited nicely, so print its buffer */
853
928
854
bool bret = print_out_password(proc->buffer, proc->buffer_length);
929
bool bret = print_out_password(proc->buffer,
930
proc->buffer_length);
855
931
if(not bret){
856
932
perror("print_out_password");
857
933
exitstatus = EXIT_FAILURE;
858
934
}
859
goto end;
935
goto fallback;
860
936
}
937
861
938
/* This process has not completed. Does it have any output? */
862
939
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
863
940
/* This process had nothing to say at this time */
870
947
if (proc->buffer == NULL){
871
948
perror("malloc");
872
949
exitstatus = EXIT_FAILURE;
873
goto end;
950
goto fallback;
874
951
}
875
952
proc->buffer_size += BUFFER_SIZE;
876
953
}
891
968
}
892
969
893
970
894
end:
971
fallback:
895
972
896
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
897
/* Fallback if all plugins failed, none are found or an error occured */
973
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
974
/* Fallback if all plugins failed, none are found or an error
975
occured */
898
976
bool bret;
899
977
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
900
978
char *passwordbuffer = getpass("Password: ");
902
980
if(not bret){
903
981
perror("print_out_password");
904
982
exitstatus = EXIT_FAILURE;
905
goto end;
906
983
}
907
984
}
908
985
909
986
/* Restore old signal handler */
910
sigaction(SIGCHLD, &old_sigchld_action, NULL);
911
912
free(custom_argv);
913
914
/* Free the plugin list */
915
for(plugin *next; plugin_list != NULL; plugin_list = next){
916
next = plugin_list->next;
917
free(plugin_list->argv);
918
if(plugin_list->environ[0] != NULL){
919
for(char **e = plugin_list->environ; *e != NULL; e++){
920
free(*e);
921
}
987
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
988
if(ret == -1){
989
perror("sigaction");
990
exitstatus = EXIT_FAILURE;
991
}
992
993
if(custom_argv != NULL){
994
for(char **arg = custom_argv+1; *arg != NULL; arg++){
995
free(*arg);
922
996
}
923
free(plugin_list->environ);
924
free(plugin_list);
997
free(custom_argv);
925
998
}
926
999
927
1000
if(dir != NULL){
929
1002
}
930
1003
931
1004
/* Free the process list and kill the processes */
932
for(process *next; process_list != NULL; process_list = next){
933
next = process_list->next;
934
close(process_list->fd);
935
ret = kill(process_list->pid, SIGTERM);
936
if(ret == -1 and errno != ESRCH){
937
/* set-uid proccesses migth not get closed */
938
perror("kill");
1005
for(plugin *p = plugin_list; p != NULL; p = p->next){
1006
if(p->pid != 0){
1007
close(p->fd);
1008
ret = kill(p->pid, SIGTERM);
1009
if(ret == -1 and errno != ESRCH){
1010
/* Set-uid proccesses might not get closed */
1011
perror("kill");
1012
}
939
1013
}
940
free(process_list->buffer);
941
free(process_list);
942
1014
}
943
1015
944
1016
/* Wait for any remaining child processes to terminate */
948
1020
if(errno != ECHILD){
949
1021
perror("wait");
950
1022
}
1023
1024
free_plugin_list();
1025
1026
free(plugindir);
1027
free(argfile);
951
1028
952
1029
return exitstatus;
953
1030
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0