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- Committer: Teddy Hogeborn
- Date: 2008-08-31 16:04:47 UTC
- mfrom: (24.1.77 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080831160447-2xte5k90onspphki
Merge.
- 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)) struct argp_state *state) {
314
360
/* Get the INPUT argument from `argp_parse', which we know is a
315
361
pointer to our plugin list pointer. */
316
plugin **plugins = state->input;
317
362
switch (key) {
318
case 'g':
363
case 'g': /* --global-options */
319
364
if (arg != NULL){
320
365
char *p;
321
366
while((p = strsep(&arg, ",")) != NULL){
322
367
if(p[0] == '\0'){
323
368
continue;
324
369
}
325
if(not add_argument(getplugin(NULL, plugins), p)){
370
if(not add_argument(getplugin(NULL), p)){
326
371
perror("add_argument");
327
372
return ARGP_ERR_UNKNOWN;
328
373
}
329
374
}
330
375
}
331
376
break;
332
case 'e':
377
case 'e': /* --global-envs */
333
378
if(arg == NULL){
334
379
break;
335
380
}
338
383
if(envdef == NULL){
339
384
break;
340
385
}
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
386
if(not add_environment(getplugin(NULL), envdef)){
342
387
perror("add_environment");
343
388
}
344
389
}
345
390
break;
346
case 'o':
391
case 'o': /* --options-for */
347
392
if (arg != NULL){
348
393
char *p_name = strsep(&arg, ":");
349
394
if(p_name[0] == '\0'){
359
404
if(p[0] == '\0'){
360
405
continue;
361
406
}
362
if(not add_argument(getplugin(p_name, plugins), p)){
407
if(not add_argument(getplugin(p_name), p)){
363
408
perror("add_argument");
364
409
return ARGP_ERR_UNKNOWN;
365
410
}
367
412
}
368
413
}
369
414
break;
370
case 'f':
415
case 'f': /* --envs-for */
371
416
if(arg == NULL){
372
417
break;
373
418
}
381
426
break;
382
427
}
383
428
envdef++;
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
429
if(not add_environment(getplugin(p_name), envdef)){
385
430
perror("add_environment");
386
431
}
387
432
}
388
433
break;
389
case 'd':
434
case 'd': /* --disable */
390
435
if (arg != NULL){
391
plugin *p = getplugin(arg, plugins);
436
plugin *p = getplugin(arg);
392
437
if(p == NULL){
393
438
return ARGP_ERR_UNKNOWN;
394
439
}
395
440
p->disabled = true;
396
441
}
397
442
break;
398
case 128:
399
plugindir = arg;
443
case 128: /* --plugin-dir */
444
plugindir = strdup(arg);
445
if(plugindir == NULL){
446
perror("strdup");
447
}
400
448
break;
401
case 129:
449
case 129: /* --config-file */
450
argfile = strdup(arg);
451
if(argfile == NULL){
452
perror("strdup");
453
}
454
break;
455
case 130: /* --userid */
402
456
uid = (uid_t)strtol(arg, NULL, 10);
403
457
break;
404
case 130:
458
case 131: /* --groupid */
405
459
gid = (gid_t)strtol(arg, NULL, 10);
406
460
break;
407
case 131:
461
case 132: /* --debug */
408
462
debug = true;
409
463
break;
410
464
case ARGP_KEY_ARG:
418
472
return 0;
419
473
}
420
474
421
plugin *plugin_list = NULL;
422
423
475
struct argp argp = { .options = options, .parser = parse_opt,
424
476
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
425
477
.doc = "Mandos plugin runner -- Run plugins" };
426
478
427
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
479
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
428
480
if (ret == ARGP_ERR_UNKNOWN){
429
481
fprintf(stderr, "Unknown error while parsing arguments\n");
430
482
exitstatus = EXIT_FAILURE;
431
goto end;
483
goto fallback;
432
484
}
433
485
434
conffp = fopen(argfile, "r");
486
/* Opens the configfile if aviable */
487
if (argfile == NULL){
488
conffp = fopen(AFILE, "r");
489
} else {
490
conffp = fopen(argfile, "r");
491
}
435
492
if(conffp != NULL){
436
493
char *org_line = NULL;
494
char *p, *arg, *new_arg, *line;
437
495
size_t size = 0;
438
496
ssize_t sret;
439
char *p, *arg, *new_arg, *line;
440
497
const char whitespace_delims[] = " \r\t\f\v\n";
441
498
const char comment_delim[] = "#";
442
499
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 */
443
511
while(true){
444
512
sret = getline(&org_line, &size, conffp);
445
513
if(sret == -1){
453
521
continue;
454
522
}
455
523
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
}
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;
462
542
}
463
543
}
464
544
free(org_line);
468
548
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
469
549
perror("fopen");
470
550
exitstatus = EXIT_FAILURE;
471
goto end;
551
goto fallback;
472
552
}
473
553
}
474
554
/* If there was any arguments from configuration file,
555
pass them to parser as command arguments */
475
556
if(custom_argv != NULL){
476
custom_argv[0] = argv[0];
477
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
557
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
478
558
if (ret == ARGP_ERR_UNKNOWN){
479
559
fprintf(stderr, "Unknown error while parsing arguments\n");
480
560
exitstatus = EXIT_FAILURE;
481
goto end;
561
goto fallback;
482
562
}
483
563
}
484
564
495
575
}
496
576
}
497
577
}
498
578
579
/* Strip permissions down to nobody */
499
580
ret = setuid(uid);
500
581
if (ret == -1){
501
582
perror("setuid");
502
}
503
583
}
504
584
setgid(gid);
505
585
if (ret == -1){
506
586
perror("setgid");
507
587
}
588
589
if (plugindir == NULL){
590
dir = opendir(PDIR);
591
} else {
592
dir = opendir(plugindir);
593
}
508
594
509
dir = opendir(plugindir);
510
595
if(dir == NULL){
511
596
perror("Could not open plugin dir");
512
597
exitstatus = EXIT_FAILURE;
513
goto end;
598
goto fallback;
514
599
}
515
600
516
601
/* Set the FD_CLOEXEC flag on the directory, if possible */
521
606
if(ret < 0){
522
607
perror("set_cloexec_flag");
523
608
exitstatus = EXIT_FAILURE;
524
goto end;
609
goto fallback;
525
610
}
526
611
}
527
612
}
528
613
529
614
FD_ZERO(&rfds_all);
530
615
616
/* Read and execute any executable in the plugin directory*/
531
617
while(true){
532
618
dirst = readdir(dir);
533
619
536
622
if (errno == EBADF){
537
623
perror("readdir");
538
624
exitstatus = EXIT_FAILURE;
539
goto end;
625
goto fallback;
540
626
}
541
627
break;
542
628
}
564
650
break;
565
651
}
566
652
}
567
568
653
if(bad_name){
569
654
continue;
570
655
}
571
572
656
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
573
657
size_t suf_len = strlen(*suf);
574
658
if((d_name_len >= suf_len)
601
685
free(filename);
602
686
continue;
603
687
}
604
688
689
/* Ignore non-executable files */
605
690
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
606
691
if(debug){
607
692
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
610
695
free(filename);
611
696
continue;
612
697
}
613
plugin *p = getplugin(dirst->d_name, &plugin_list);
698
699
plugin *p = getplugin(dirst->d_name);
614
700
if(p == NULL){
615
701
perror("getplugin");
616
702
free(filename);
626
712
}
627
713
{
628
714
/* Add global arguments to argument list for this plugin */
629
plugin *g = getplugin(NULL, &plugin_list);
715
plugin *g = getplugin(NULL);
630
716
if(g != NULL){
631
717
for(char **a = g->argv + 1; *a != NULL; a++){
632
718
if(not add_argument(p, *a)){
657
743
}
658
744
}
659
745
660
int pipefd[2];
746
int pipefd[2];
661
747
ret = pipe(pipefd);
662
748
if (ret == -1){
663
749
perror("pipe");
664
750
exitstatus = EXIT_FAILURE;
665
goto end;
751
goto fallback;
666
752
}
753
/* Ask OS to automatic close the pipe on exec */
667
754
ret = set_cloexec_flag(pipefd[0]);
668
755
if(ret < 0){
669
756
perror("set_cloexec_flag");
670
757
exitstatus = EXIT_FAILURE;
671
goto end;
758
goto fallback;
672
759
}
673
760
ret = set_cloexec_flag(pipefd[1]);
674
761
if(ret < 0){
675
762
perror("set_cloexec_flag");
676
763
exitstatus = EXIT_FAILURE;
677
goto end;
764
goto fallback;
678
765
}
679
766
/* Block SIGCHLD until process is safely in process list */
680
767
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
681
768
if(ret < 0){
682
769
perror("sigprocmask");
683
770
exitstatus = EXIT_FAILURE;
684
goto end;
771
goto fallback;
685
772
}
686
773
// Starting a new process to be watched
687
774
pid_t pid = fork();
688
775
if(pid == -1){
689
776
perror("fork");
690
777
exitstatus = EXIT_FAILURE;
691
goto end;
778
goto fallback;
692
779
}
693
780
if(pid == 0){
694
781
/* this is the child process */
727
814
}
728
815
/* no return */
729
816
}
730
/* parent process */
817
/* Parent process */
818
close(pipefd[1]); /* Close unused write end of pipe */
731
819
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");
820
plugin *new_plugin = getplugin(dirst->d_name);
821
if (new_plugin == NULL){
822
perror("getplugin");
736
823
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
737
824
if(ret < 0){
738
perror("sigprocmask");
825
perror("sigprocmask");
739
826
}
740
827
exitstatus = EXIT_FAILURE;
741
goto end;
828
goto fallback;
742
829
}
743
830
744
*new_process = (struct process){ .pid = pid,
745
.fd = pipefd[0],
746
.next = process_list };
747
// List handling
748
process_list = new_process;
831
new_plugin->pid = pid;
832
new_plugin->fd = pipefd[0];
833
749
834
/* Unblock SIGCHLD so signal handler can be run if this process
750
835
has already completed */
751
836
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
752
837
if(ret < 0){
753
838
perror("sigprocmask");
754
839
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);
840
goto fallback;
841
}
842
843
FD_SET(new_plugin->fd, &rfds_all);
844
845
if (maxfd < new_plugin->fd){
846
maxfd = new_plugin->fd;
847
}
848
776
849
}
777
850
778
851
closedir(dir);
779
852
dir = NULL;
780
781
if (process_list == NULL){
782
fprintf(stderr, "No plugin processes started. Incorrect plugin"
783
" directory?\n");
784
process_list = 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
}
785
863
}
786
while(process_list){
864
865
/* Main loop while running plugins exist */
866
while(plugin_list){
787
867
fd_set rfds = rfds_all;
788
868
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
789
869
if (select_ret == -1){
790
870
perror("select");
791
871
exitstatus = EXIT_FAILURE;
792
goto end;
872
goto fallback;
793
873
}
794
874
/* OK, now either a process completed, or something can be read
795
875
from one of them */
796
for(process *proc = process_list; proc ; proc = proc->next){
876
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
797
877
/* Is this process completely done? */
798
878
if(proc->eof and proc->completed){
799
879
/* Only accept the plugin output if it exited cleanly */
800
880
if(not WIFEXITED(proc->status)
801
881
or WEXITSTATUS(proc->status) != 0){
802
882
/* Bad exit by plugin */
883
803
884
if(debug){
804
885
if(WIFEXITED(proc->status)){
805
886
fprintf(stderr, "Plugin %u exited with status %d\n",
814
895
(unsigned int) (proc->pid));
815
896
}
816
897
}
898
817
899
/* Remove the plugin */
818
900
FD_CLR(proc->fd, &rfds_all);
901
819
902
/* Block signal while modifying process_list */
820
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
903
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
821
904
if(ret < 0){
822
905
perror("sigprocmask");
823
906
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
}
907
goto fallback;
908
}
909
free_plugin(proc);
839
910
/* We are done modifying process list, so unblock signal */
840
911
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
841
912
NULL);
842
913
if(ret < 0){
843
914
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;
915
exitstatus = EXIT_FAILURE;
916
goto fallback;
917
}
918
919
if(plugin_list == NULL){
920
break;
921
}
922
continue;
851
923
}
924
852
925
/* This process exited nicely, so print its buffer */
853
926
854
bool bret = print_out_password(proc->buffer, proc->buffer_length);
927
bool bret = print_out_password(proc->buffer,
928
proc->buffer_length);
855
929
if(not bret){
856
930
perror("print_out_password");
857
931
exitstatus = EXIT_FAILURE;
858
932
}
859
goto end;
933
goto fallback;
860
934
}
935
861
936
/* This process has not completed. Does it have any output? */
862
937
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
863
938
/* This process had nothing to say at this time */
870
945
if (proc->buffer == NULL){
871
946
perror("malloc");
872
947
exitstatus = EXIT_FAILURE;
873
goto end;
948
goto fallback;
874
949
}
875
950
proc->buffer_size += BUFFER_SIZE;
876
951
}
891
966
}
892
967
893
968
894
end:
969
fallback:
895
970
896
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
897
/* Fallback if all plugins failed, none are found or an error occured */
971
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
972
/* Fallback if all plugins failed, none are found or an error
973
occured */
898
974
bool bret;
899
975
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
900
976
char *passwordbuffer = getpass("Password: ");
902
978
if(not bret){
903
979
perror("print_out_password");
904
980
exitstatus = EXIT_FAILURE;
905
goto end;
906
981
}
907
982
}
908
983
909
984
/* 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
}
985
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
986
if(ret == -1){
987
perror("sigaction");
988
exitstatus = EXIT_FAILURE;
989
}
990
991
if(custom_argv != NULL){
992
for(char **arg = custom_argv+1; *arg != NULL; arg++){
993
free(*arg);
922
994
}
923
free(plugin_list->environ);
924
free(plugin_list);
995
free(custom_argv);
925
996
}
926
997
927
998
if(dir != NULL){
929
1000
}
930
1001
931
1002
/* 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");
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
}
939
1011
}
940
free(process_list->buffer);
941
free(process_list);
942
1012
}
943
1013
944
1014
/* Wait for any remaining child processes to terminate */
948
1018
if(errno != ECHILD){
949
1019
perror("wait");
950
1020
}
1021
1022
free_plugin_list();
1023
1024
free(plugindir);
1025
free(argfile);
951
1026
952
1027
return exitstatus;
953
1028
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0