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 117
- compare with another revision
- download diff
- download tarball
- view history from revision 117
- Committer: Teddy Hogeborn
- Date: 2008-08-30 11:39:54 UTC
- Revision ID: teddy@fukt.bsnet.se-20080830113954-sbvgeq7z0wkdvz17
* mandos-keygen.xml (ENVIRONMENT): Replaced <varname> with <envar>.
* mandos.xml (ENVIRONMENT): - '' -
* mandos.xml (ENVIRONMENT): - '' -
- files removed:
- INSTALL
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
plugin-runner.c
72
72
const char *argp_program_version = "plugin-runner 1.0";
73
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
74
75
struct plugin;
76
77
typedef struct plugin{
78
char *name; /* can be NULL or any plugin name */
79
char **argv;
80
int argc;
81
char **environ;
82
int envc;
83
bool disabled;
84
85
/* Variables used for running processes*/
75
struct process;
76
77
typedef struct process{
86
78
pid_t pid;
87
79
int fd;
88
80
char *buffer;
91
83
bool eof;
92
84
volatile bool completed;
93
85
volatile int status;
86
struct process *next;
87
} process;
88
89
typedef struct plugin{
90
char *name; /* can be NULL or any plugin name */
91
char **argv;
92
int argc;
93
char **environ;
94
int envc;
95
bool disabled;
94
96
struct plugin *next;
95
97
} plugin;
96
98
97
static plugin *plugin_list = NULL;
98
99
/* Gets an 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){
99
static plugin *getplugin(char *name, plugin **plugin_list){
100
for (plugin *p = *plugin_list; p != NULL; p = p->next){
104
101
if ((p->name == name)
105
102
or (p->name and name and (strcmp(p->name, name) == 0))){
106
103
return p;
121
118
122
119
*new_plugin = (plugin) { .name = copy_name,
123
120
.argc = 1,
121
.envc = 0,
124
122
.disabled = false,
125
.next = plugin_list };
123
.next = *plugin_list };
126
124
127
125
new_plugin->argv = malloc(sizeof(char *) * 2);
128
126
if (new_plugin->argv == NULL){
132
130
}
133
131
new_plugin->argv[0] = copy_name;
134
132
new_plugin->argv[1] = NULL;
135
133
136
134
new_plugin->environ = malloc(sizeof(char *));
137
135
if(new_plugin->environ == NULL){
138
136
free(copy_name);
141
139
return NULL;
142
140
}
143
141
new_plugin->environ[0] = NULL;
144
145
142
/* Append the new plugin to the list */
146
plugin_list = new_plugin;
143
*plugin_list = new_plugin;
147
144
return new_plugin;
148
145
}
149
146
179
176
}
180
177
181
178
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def, bool replace){
179
static bool add_environment(plugin *p, const char *def){
183
180
if(p == NULL){
184
181
return false;
185
182
}
186
/* namelen = length of name of environment variable */
187
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
/* Search for this environment variable */
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen + 1) == 0){
191
/* It already exists */
192
if(replace){
193
char *new = realloc(*e, strlen(def) + 1);
194
if(new == NULL){
195
return false;
196
}
197
*e = new;
198
strcpy(*e, def);
199
}
200
return true;
201
}
202
}
203
183
return add_to_char_array(def, &(p->environ), &(p->envc));
204
184
}
205
185
186
206
187
/*
207
188
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
189
* Descriptor Flags".
219
200
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
220
201
}
221
202
203
process *process_list = NULL;
222
204
223
205
/* Mark processes as completed when they exit, and save their exit
224
206
status. */
225
207
void handle_sigchld(__attribute__((unused)) int sig){
226
208
while(true){
227
plugin *proc = plugin_list;
209
process *proc = process_list;
228
210
int status;
229
211
pid_t pid = waitpid(-1, &status, WNOHANG);
230
212
if(pid == 0){
238
220
/* No child processes */
239
221
break;
240
222
}
241
223
242
224
/* A child exited, find it in process_list */
243
225
while(proc != NULL and proc->pid != pid){
244
226
proc = proc->next;
252
234
}
253
235
}
254
236
255
/* Prints out a password to stdout */
256
237
bool print_out_password(const char *buffer, size_t length){
257
238
ssize_t ret;
239
if(length>0 and buffer[length-1] == '\n'){
240
length--;
241
}
258
242
for(size_t written = 0; written < length; written += (size_t)ret){
259
243
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
260
244
length - written));
265
249
return true;
266
250
}
267
251
268
/* Removes and free a plugin from the plugin list */
269
static void free_plugin(plugin *plugin_node){
270
271
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
272
free(*arg);
273
}
274
free(plugin_node->argv);
275
for(char **env = plugin_node->environ; *env != NULL; env++){
276
free(*env);
277
}
278
free(plugin_node->environ);
279
free(plugin_node->buffer);
280
281
/* Removes the plugin from the singly-linked list */
282
if(plugin_node == plugin_list){
283
/* First one - simple */
284
plugin_list = plugin_list->next;
285
} else {
286
/* Second one or later */
287
for(plugin *p = plugin_list; p != NULL; p = p->next){
288
if(p->next == plugin_node){
289
p->next = plugin_node->next;
290
break;
291
}
292
}
293
}
294
295
free(plugin_node);
296
}
297
298
static void free_plugin_list(void){
299
while(plugin_list != NULL){
300
free_plugin(plugin_list);
252
static void free_plugin_list(plugin *plugin_list){
253
for(plugin *next; plugin_list != NULL; plugin_list = next){
254
next = plugin_list->next;
255
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
256
free(*arg);
257
}
258
free(plugin_list->argv);
259
for(char **env = plugin_list->environ; *env != NULL; env++){
260
free(*env);
261
}
262
free(plugin_list->environ);
263
free(plugin_list);
301
264
}
302
265
}
303
266
341
304
{ .name = "global-options", .key = 'g',
342
305
.arg = "OPTION[,OPTION[,...]]",
343
306
.doc = "Options passed to all plugins" },
344
{ .name = "global-env", .key = 'G',
307
{ .name = "global-envs", .key = 'e',
345
308
.arg = "VAR=value",
346
309
.doc = "Environment variable passed to all plugins" },
347
310
{ .name = "options-for", .key = 'o',
348
311
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
349
312
.doc = "Options passed only to specified plugin" },
350
{ .name = "env-for", .key = 'E',
313
{ .name = "envs-for", .key = 'f',
351
314
.arg = "PLUGIN:ENV=value",
352
315
.doc = "Environment variable passed to specified plugin" },
353
316
{ .name = "disable", .key = 'd',
354
317
.arg = "PLUGIN",
355
318
.doc = "Disable a specific plugin", .group = 1 },
356
{ .name = "enable", .key = 'e',
357
.arg = "PLUGIN",
358
.doc = "Enable a specific plugin", .group = 1 },
359
319
{ .name = "plugin-dir", .key = 128,
360
320
.arg = "DIRECTORY",
361
321
.doc = "Specify a different plugin directory", .group = 2 },
373
333
{ .name = NULL }
374
334
};
375
335
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
336
error_t parse_opt (int key, char *arg, struct argp_state *state) {
337
/* Get the INPUT argument from `argp_parse', which we know is a
338
pointer to our plugin list pointer. */
339
plugin **plugins = state->input;
378
340
switch (key) {
379
case 'g': /* --global-options */
341
case 'g':
380
342
if (arg != NULL){
381
343
char *p;
382
344
while((p = strsep(&arg, ",")) != NULL){
383
345
if(p[0] == '\0'){
384
346
continue;
385
347
}
386
if(not add_argument(getplugin(NULL), p)){
348
if(not add_argument(getplugin(NULL, plugins), p)){
387
349
perror("add_argument");
388
350
return ARGP_ERR_UNKNOWN;
389
351
}
390
352
}
391
353
}
392
354
break;
393
case 'G': /* --global-env */
355
case 'e':
394
356
if(arg == NULL){
395
357
break;
396
358
}
397
if(not add_environment(getplugin(NULL), arg, true)){
398
perror("add_environment");
359
{
360
char *envdef = strdup(arg);
361
if(envdef == NULL){
362
break;
363
}
364
if(not add_environment(getplugin(NULL, plugins), envdef)){
365
perror("add_environment");
366
}
399
367
}
400
368
break;
401
case 'o': /* --options-for */
369
case 'o':
402
370
if (arg != NULL){
403
371
char *p_name = strsep(&arg, ":");
404
if(p_name[0] == '\0' or arg == NULL){
372
if(p_name[0] == '\0'){
405
373
break;
406
374
}
407
375
char *opt = strsep(&arg, ":");
408
if(opt[0] == '\0' or opt == NULL){
376
if(opt[0] == '\0'){
409
377
break;
410
378
}
411
char *p;
412
while((p = strsep(&opt, ",")) != NULL){
413
if(p[0] == '\0'){
414
continue;
415
}
416
if(not add_argument(getplugin(p_name), p)){
417
perror("add_argument");
418
return ARGP_ERR_UNKNOWN;
379
if(opt != NULL){
380
char *p;
381
while((p = strsep(&opt, ",")) != NULL){
382
if(p[0] == '\0'){
383
continue;
384
}
385
if(not add_argument(getplugin(p_name, plugins), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
388
}
419
389
}
420
390
}
421
391
}
422
392
break;
423
case 'E': /* --env-for */
393
case 'f':
424
394
if(arg == NULL){
425
395
break;
426
396
}
429
399
if(envdef == NULL){
430
400
break;
431
401
}
432
*envdef = '\0';
433
if(not add_environment(getplugin(arg), envdef+1, true)){
402
char *p_name = strndup(arg, (size_t) (envdef-arg));
403
if(p_name == NULL){
404
break;
405
}
406
envdef++;
407
if(not add_environment(getplugin(p_name, plugins), envdef)){
434
408
perror("add_environment");
435
409
}
436
410
}
437
411
break;
438
case 'd': /* --disable */
412
case 'd':
439
413
if (arg != NULL){
440
plugin *p = getplugin(arg);
414
plugin *p = getplugin(arg, plugins);
441
415
if(p == NULL){
442
416
return ARGP_ERR_UNKNOWN;
443
417
}
444
418
p->disabled = true;
445
419
}
446
420
break;
447
case 'e': /* --enable */
448
if (arg != NULL){
449
plugin *p = getplugin(arg);
450
if(p == NULL){
451
return ARGP_ERR_UNKNOWN;
452
}
453
p->disabled = false;
454
}
455
break;
456
case 128: /* --plugin-dir */
457
free(plugindir);
421
case 128:
458
422
plugindir = strdup(arg);
459
423
if(plugindir == NULL){
460
424
perror("strdup");
461
425
}
462
426
break;
463
case 129: /* --config-file */
464
/* This is already done by parse_opt_config_file() */
465
break;
466
case 130: /* --userid */
427
case 129:
428
argfile = strdup(arg);
429
if(argfile == NULL){
430
perror("strdup");
431
}
432
break;
433
case 130:
467
434
uid = (uid_t)strtol(arg, NULL, 10);
468
435
break;
469
case 131: /* --groupid */
436
case 131:
470
437
gid = (gid_t)strtol(arg, NULL, 10);
471
438
break;
472
case 132: /* --debug */
439
case 132:
473
440
debug = true;
474
441
break;
475
442
case ARGP_KEY_ARG:
476
/* Cryptsetup always passes an argument, which is an empty
477
string if "none" was specified in /etc/crypttab. So if
478
argument was empty, we ignore it silently. */
479
if(arg[0] != '\0'){
480
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
481
}
482
break;
483
case ARGP_KEY_END:
484
break;
485
default:
486
return ARGP_ERR_UNKNOWN;
487
}
488
return 0;
489
}
490
491
/* This option parser is the same as parse_opt() above, except it
492
ignores everything but the --config-file option. */
493
error_t parse_opt_config_file (int key, char *arg,
494
__attribute__((unused))
495
struct argp_state *state) {
496
switch (key) {
497
case 'g': /* --global-options */
498
case 'G': /* --global-env */
499
case 'o': /* --options-for */
500
case 'E': /* --env-for */
501
case 'd': /* --disable */
502
case 'e': /* --enable */
503
case 128: /* --plugin-dir */
504
break;
505
case 129: /* --config-file */
506
free(argfile);
507
argfile = strdup(arg);
508
if(argfile == NULL){
509
perror("strdup");
510
}
511
break;
512
case 130: /* --userid */
513
case 131: /* --groupid */
514
case 132: /* --debug */
515
case ARGP_KEY_ARG:
516
case ARGP_KEY_END:
517
break;
518
default:
519
return ARGP_ERR_UNKNOWN;
520
}
521
return 0;
522
}
523
524
struct argp argp = { .options = options,
525
.parser = parse_opt_config_file,
526
.args_doc = "",
443
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
444
break;
445
case ARGP_KEY_END:
446
break;
447
default:
448
return ARGP_ERR_UNKNOWN;
449
}
450
return 0;
451
}
452
453
plugin *plugin_list = NULL;
454
455
struct argp argp = { .options = options, .parser = parse_opt,
456
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
527
457
.doc = "Mandos plugin runner -- Run plugins" };
528
458
529
/* Parse using the parse_opt_config_file in order to get the custom
530
config file location, if any. */
531
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
459
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
532
460
if (ret == ARGP_ERR_UNKNOWN){
533
461
fprintf(stderr, "Unknown error while parsing arguments\n");
534
462
exitstatus = EXIT_FAILURE;
535
463
goto fallback;
536
464
}
537
538
/* Reset to the normal argument parser */
539
argp.parser = parse_opt;
540
541
/* Open the configfile if available */
465
542
466
if (argfile == NULL){
543
467
conffp = fopen(AFILE, "r");
544
468
} else {
545
469
conffp = fopen(argfile, "r");
546
}
470
}
471
547
472
if(conffp != NULL){
548
473
char *org_line = NULL;
549
474
char *p, *arg, *new_arg, *line;
561
486
}
562
487
custom_argv[0] = argv[0];
563
488
custom_argv[1] = NULL;
564
565
/* for each line in the config file, strip whitespace and ignore
566
commented text */
489
567
490
while(true){
568
491
sret = getline(&org_line, &size, conffp);
569
492
if(sret == -1){
598
521
}
599
522
}
600
523
free(org_line);
601
} else {
524
} else{
602
525
/* Check for harmful errors and go to fallback. Other errors might
603
526
not affect opening plugins */
604
527
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
607
530
goto fallback;
608
531
}
609
532
}
610
/* If there was any arguments from configuration file,
611
pass them to parser as command arguments */
533
612
534
if(custom_argv != NULL){
613
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
614
0, NULL);
535
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
615
536
if (ret == ARGP_ERR_UNKNOWN){
616
537
fprintf(stderr, "Unknown error while parsing arguments\n");
617
538
exitstatus = EXIT_FAILURE;
619
540
}
620
541
}
621
542
622
/* Parse actual command line arguments, to let them override the
623
config file */
624
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
625
if (ret == ARGP_ERR_UNKNOWN){
626
fprintf(stderr, "Unknown error while parsing arguments\n");
627
exitstatus = EXIT_FAILURE;
628
goto fallback;
629
}
630
631
543
if(debug){
632
544
for(plugin *p = plugin_list; p != NULL; p=p->next){
633
545
fprintf(stderr, "Plugin: %s has %d arguments\n",
642
554
}
643
555
}
644
556
645
/* Strip permissions down to nobody */
646
557
ret = setuid(uid);
647
558
if (ret == -1){
648
559
perror("setuid");
649
}
560
}
561
650
562
setgid(gid);
651
563
if (ret == -1){
652
564
perror("setgid");
653
565
}
654
566
655
567
if (plugindir == NULL){
656
568
dir = opendir(PDIR);
657
569
} else {
679
591
680
592
FD_ZERO(&rfds_all);
681
593
682
/* Read and execute any executable in the plugin directory*/
683
594
while(true){
684
595
dirst = readdir(dir);
685
596
686
/* All directory entries have been processed */
597
// All directory entries have been processed
687
598
if(dirst == NULL){
688
599
if (errno == EBADF){
689
600
perror("readdir");
695
606
696
607
d_name_len = strlen(dirst->d_name);
697
608
698
/* Ignore dotfiles, backup files and other junk */
609
// Ignore dotfiles, backup files and other junk
699
610
{
700
611
bool bad_name = false;
701
612
716
627
break;
717
628
}
718
629
}
630
719
631
if(bad_name){
720
632
continue;
721
633
}
634
722
635
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
723
636
size_t suf_len = strlen(*suf);
724
637
if((d_name_len >= suf_len)
739
652
}
740
653
741
654
char *filename;
742
if(plugindir == NULL){
743
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
744
} else {
745
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
746
}
655
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
747
656
if(ret < 0){
748
657
perror("asprintf");
749
658
continue;
755
664
free(filename);
756
665
continue;
757
666
}
758
759
/* Ignore non-executable files */
667
760
668
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
761
669
if(debug){
762
670
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
765
673
free(filename);
766
674
continue;
767
675
}
768
769
plugin *p = getplugin(dirst->d_name);
676
plugin *p = getplugin(dirst->d_name, &plugin_list);
770
677
if(p == NULL){
771
678
perror("getplugin");
772
679
free(filename);
782
689
}
783
690
{
784
691
/* Add global arguments to argument list for this plugin */
785
plugin *g = getplugin(NULL);
692
plugin *g = getplugin(NULL, &plugin_list);
786
693
if(g != NULL){
787
694
for(char **a = g->argv + 1; *a != NULL; a++){
788
695
if(not add_argument(p, *a)){
791
698
}
792
699
/* Add global environment variables */
793
700
for(char **e = g->environ; *e != NULL; e++){
794
if(not add_environment(p, *e, false)){
701
if(not add_environment(p, *e)){
795
702
perror("add_environment");
796
703
}
797
704
}
802
709
process, too. */
803
710
if(p->environ[0] != NULL){
804
711
for(char **e = environ; *e != NULL; e++){
805
if(not add_environment(p, *e, false)){
712
char *copy = strdup(*e);
713
if(copy == NULL){
714
perror("strdup");
715
continue;
716
}
717
if(not add_environment(p, copy)){
806
718
perror("add_environment");
807
719
}
808
720
}
815
727
exitstatus = EXIT_FAILURE;
816
728
goto fallback;
817
729
}
818
/* Ask OS to automatic close the pipe on exec */
819
730
ret = set_cloexec_flag(pipefd[0]);
820
731
if(ret < 0){
821
732
perror("set_cloexec_flag");
835
746
exitstatus = EXIT_FAILURE;
836
747
goto fallback;
837
748
}
838
/* Starting a new process to be watched */
749
// Starting a new process to be watched
839
750
pid_t pid = fork();
840
751
if(pid == -1){
841
752
perror("fork");
879
790
}
880
791
/* no return */
881
792
}
882
/* Parent process */
883
close(pipefd[1]); /* Close unused write end of pipe */
793
/* parent process */
884
794
free(filename);
885
plugin *new_plugin = getplugin(dirst->d_name);
886
if (new_plugin == NULL){
887
perror("getplugin");
795
close(pipefd[1]); /* close unused write end of pipe */
796
process *new_process = malloc(sizeof(process));
797
if (new_process == NULL){
798
perror("malloc");
888
799
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
889
800
if(ret < 0){
890
perror("sigprocmask");
801
perror("sigprocmask");
891
802
}
892
803
exitstatus = EXIT_FAILURE;
893
804
goto fallback;
894
805
}
895
806
896
new_plugin->pid = pid;
897
new_plugin->fd = pipefd[0];
898
807
*new_process = (struct process){ .pid = pid,
808
.fd = pipefd[0],
809
.next = process_list };
810
// List handling
811
process_list = new_process;
899
812
/* Unblock SIGCHLD so signal handler can be run if this process
900
813
has already completed */
901
814
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
905
818
goto fallback;
906
819
}
907
820
908
FD_SET(new_plugin->fd, &rfds_all);
821
FD_SET(new_process->fd, &rfds_all);
909
822
910
if (maxfd < new_plugin->fd){
911
maxfd = new_plugin->fd;
823
if (maxfd < new_process->fd){
824
maxfd = new_process->fd;
912
825
}
913
826
914
827
}
828
829
free_plugin_list(plugin_list);
830
plugin_list = NULL;
915
831
916
832
closedir(dir);
917
833
dir = NULL;
918
919
for(plugin *p = plugin_list; p != NULL; p = p->next){
920
if(p->pid != 0){
921
break;
922
}
923
if(p->next == NULL){
924
fprintf(stderr, "No plugin processes started. Incorrect plugin"
925
" directory?\n");
926
free_plugin_list();
927
}
834
835
if (process_list == NULL){
836
fprintf(stderr, "No plugin processes started. Incorrect plugin"
837
" directory?\n");
838
process_list = NULL;
928
839
}
929
930
/* Main loop while running plugins exist */
931
while(plugin_list){
840
while(process_list){
932
841
fd_set rfds = rfds_all;
933
842
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
934
843
if (select_ret == -1){
938
847
}
939
848
/* OK, now either a process completed, or something can be read
940
849
from one of them */
941
for(plugin *proc = plugin_list; proc != NULL;){
850
for(process *proc = process_list; proc ; proc = proc->next){
942
851
/* Is this process completely done? */
943
852
if(proc->eof and proc->completed){
944
853
/* Only accept the plugin output if it exited cleanly */
945
854
if(not WIFEXITED(proc->status)
946
855
or WEXITSTATUS(proc->status) != 0){
947
856
/* Bad exit by plugin */
948
949
857
if(debug){
950
858
if(WIFEXITED(proc->status)){
951
859
fprintf(stderr, "Plugin %u exited with status %d\n",
960
868
(unsigned int) (proc->pid));
961
869
}
962
870
}
963
964
871
/* Remove the plugin */
965
872
FD_CLR(proc->fd, &rfds_all);
966
967
873
/* Block signal while modifying process_list */
968
874
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
969
875
if(ret < 0){
971
877
exitstatus = EXIT_FAILURE;
972
878
goto fallback;
973
879
}
974
880
/* Delete this process entry from the list */
881
if(process_list == proc){
882
/* First one - simple */
883
process_list = proc->next;
884
} else {
885
/* Second one or later */
886
for(process *p = process_list; p != NULL; p = p->next){
887
if(p->next == proc){
888
p->next = proc->next;
889
break;
890
}
891
}
892
}
975
893
/* We are done modifying process list, so unblock signal */
976
894
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
977
895
NULL);
978
896
if(ret < 0){
979
897
perror("sigprocmask");
980
exitstatus = EXIT_FAILURE;
981
goto fallback;
982
}
983
984
if(plugin_list == NULL){
985
break;
986
}
987
988
plugin *next_plugin = proc->next;
989
free_plugin(proc);
990
proc = next_plugin;
991
continue;
898
}
899
free(proc->buffer);
900
free(proc);
901
/* We deleted this process from the list, so we can't go
902
proc->next. Therefore, start over from the beginning of
903
the process list */
904
break;
992
905
}
993
994
906
/* This process exited nicely, so print its buffer */
995
907
996
908
bool bret = print_out_password(proc->buffer,
1001
913
}
1002
914
goto fallback;
1003
915
}
1004
1005
916
/* This process has not completed. Does it have any output? */
1006
917
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1007
918
/* This process had nothing to say at this time */
1008
proc = proc->next;
1009
919
continue;
1010
920
}
1011
921
/* Before reading, make the process' data buffer large enough */
1024
934
BUFFER_SIZE);
1025
935
if(ret < 0){
1026
936
/* Read error from this process; ignore the error */
1027
proc = proc->next;
1028
937
continue;
1029
938
}
1030
939
if(ret == 0){
1039
948
1040
949
fallback:
1041
950
1042
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
951
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1043
952
/* Fallback if all plugins failed, none are found or an error
1044
953
occured */
1045
954
bool bret;
1046
955
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1047
956
char *passwordbuffer = getpass("Password: ");
1048
size_t len = strlen(passwordbuffer);
1049
/* Strip trailing newline */
1050
if(len > 0 and passwordbuffer[len-1] == '\n'){
1051
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1052
len--;
1053
}
1054
bret = print_out_password(passwordbuffer, len);
957
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1055
958
if(not bret){
1056
959
perror("print_out_password");
1057
960
exitstatus = EXIT_FAILURE;
1071
974
}
1072
975
free(custom_argv);
1073
976
}
977
free_plugin_list(plugin_list);
1074
978
1075
979
if(dir != NULL){
1076
980
closedir(dir);
1077
981
}
1078
982
1079
983
/* Free the process list and kill the processes */
1080
for(plugin *p = plugin_list; p != NULL; p = p->next){
1081
if(p->pid != 0){
1082
close(p->fd);
1083
ret = kill(p->pid, SIGTERM);
1084
if(ret == -1 and errno != ESRCH){
1085
/* Set-uid proccesses might not get closed */
1086
perror("kill");
1087
}
984
for(process *next; process_list != NULL; process_list = next){
985
next = process_list->next;
986
close(process_list->fd);
987
ret = kill(process_list->pid, SIGTERM);
988
if(ret == -1 and errno != ESRCH){
989
/* set-uid proccesses migth not get closed */
990
perror("kill");
1088
991
}
992
free(process_list->buffer);
993
free(process_list);
1089
994
}
1090
995
1091
996
/* Wait for any remaining child processes to terminate */
1096
1001
perror("wait");
1097
1002
}
1098
1003
1099
free_plugin_list();
1100
1101
1004
free(plugindir);
1102
1005
free(argfile);
1103
1006
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0