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- Committer: Teddy Hogeborn
- Date: 2008-08-16 16:58:31 UTC
- Revision ID: teddy@fukt.bsnet.se-20080816165831-cx018vo5i9oqmgo0
* plugins.d/password-request.c (main): Include environment variables
"cryptsource" and "crypttarget"
in password prompt.
"cryptsource" and "crypttarget"
in password prompt.
- files added:
- network-protocol.txt
- 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
}
120
}
121
122
*new_plugin = (plugin) { .name = copy_name,
108
*new_plugin = (plugin) { .name = name,
123
109
.argc = 1,
110
.envc = 0,
124
111
.disabled = false,
125
.next = plugin_list };
112
.next = *plugin_list };
126
113
127
114
new_plugin->argv = malloc(sizeof(char *) * 2);
128
115
if (new_plugin->argv == NULL){
129
free(copy_name);
130
116
free(new_plugin);
131
117
return NULL;
132
118
}
133
new_plugin->argv[0] = copy_name;
119
new_plugin->argv[0] = name;
134
120
new_plugin->argv[1] = NULL;
135
121
136
122
new_plugin->environ = malloc(sizeof(char *));
137
123
if(new_plugin->environ == NULL){
138
free(copy_name);
139
124
free(new_plugin->argv);
140
125
free(new_plugin);
141
126
return NULL;
142
127
}
143
128
new_plugin->environ[0] = NULL;
144
145
129
/* Append the new plugin to the list */
146
plugin_list = new_plugin;
130
*plugin_list = new_plugin;
147
131
return new_plugin;
148
132
}
149
133
183
167
if(p == NULL){
184
168
return false;
185
169
}
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
/* Refuse to add an existing variable */
192
return true;
193
}
194
}
195
170
return add_to_char_array(def, &(p->environ), &(p->envc));
196
171
}
197
172
173
198
174
/*
199
175
* Based on the example in the GNU LibC manual chapter 13.13 "File
200
176
* Descriptor Flags".
211
187
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
212
188
}
213
189
190
process *process_list = NULL;
214
191
215
/* Mark processes as completed when they exit, and save their exit
192
/* Mark a process as completed when it exits, and save its exit
216
193
status. */
217
194
void handle_sigchld(__attribute__((unused)) int sig){
218
while(true){
219
plugin *proc = plugin_list;
220
int status;
221
pid_t pid = waitpid(-1, &status, WNOHANG);
222
if(pid == 0){
223
/* Only still running child processes */
224
break;
225
}
226
if(pid == -1){
227
if (errno != ECHILD){
228
perror("waitpid");
229
}
230
/* No child processes */
231
break;
232
}
233
234
/* A child exited, find it in process_list */
235
while(proc != NULL and proc->pid != pid){
236
proc = proc->next;
237
}
238
if(proc == NULL){
239
/* Process not found in process list */
240
continue;
241
}
242
proc->status = status;
243
proc->completed = true;
244
}
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;
245
211
}
246
212
247
/* Prints out a password to stdout */
248
213
bool print_out_password(const char *buffer, size_t length){
249
214
ssize_t ret;
250
215
if(length>0 and buffer[length-1] == '\n'){
260
225
return true;
261
226
}
262
227
263
/* Removes and free a plugin from the plugin list */
264
static void free_plugin(plugin *plugin_node){
265
266
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
267
free(*arg);
268
}
269
free(plugin_node->argv);
270
for(char **env = plugin_node->environ; *env != NULL; env++){
271
free(*env);
272
}
273
free(plugin_node->environ);
274
free(plugin_node->buffer);
275
276
/* Removes the plugin from the singly-linked list */
277
if(plugin_node == plugin_list){
278
/* First one - simple */
279
plugin_list = plugin_list->next;
280
} else {
281
/* Second one or later */
282
for(plugin *p = plugin_list; p != NULL; p = p->next){
283
if(p->next == plugin_node){
284
p->next = plugin_node->next;
285
break;
286
}
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;
287
234
}
288
}
289
290
free(plugin_node);
291
}
292
293
static void free_plugin_list(void){
294
while(plugin_list != NULL){
295
free_plugin(plugin_list);
296
}
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;
297
247
}
298
248
299
249
int main(int argc, char *argv[]){
300
char *plugindir = NULL;
301
char *argfile = NULL;
250
const char *plugindir = "/lib/mandos/plugins.d";
251
const char *argfile = ARGFILE;
302
252
FILE *conffp;
303
253
size_t d_name_len;
304
254
DIR *dir = NULL;
319
269
/* Establish a signal handler */
320
270
sigemptyset(&sigchld_action.sa_mask);
321
271
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
322
if(ret == -1){
272
if(ret < 0){
323
273
perror("sigaddset");
324
exitstatus = EXIT_FAILURE;
325
goto fallback;
274
exit(EXIT_FAILURE);
326
275
}
327
276
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
328
if(ret == -1){
277
if(ret < 0){
329
278
perror("sigaction");
330
exitstatus = EXIT_FAILURE;
331
goto fallback;
279
exit(EXIT_FAILURE);
332
280
}
333
281
334
282
/* The options we understand. */
336
284
{ .name = "global-options", .key = 'g',
337
285
.arg = "OPTION[,OPTION[,...]]",
338
286
.doc = "Options passed to all plugins" },
339
{ .name = "global-env", .key = 'e',
287
{ .name = "global-envs", .key = 'e',
340
288
.arg = "VAR=value",
341
289
.doc = "Environment variable passed to all plugins" },
342
290
{ .name = "options-for", .key = 'o',
343
291
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
344
292
.doc = "Options passed only to specified plugin" },
345
{ .name = "env-for", .key = 'f',
293
{ .name = "envs-for", .key = 'f',
346
294
.arg = "PLUGIN:ENV=value",
347
295
.doc = "Environment variable passed to specified plugin" },
348
296
{ .name = "disable", .key = 'd',
351
299
{ .name = "plugin-dir", .key = 128,
352
300
.arg = "DIRECTORY",
353
301
.doc = "Specify a different plugin directory", .group = 2 },
354
{ .name = "config-file", .key = 129,
355
.arg = "FILE",
356
.doc = "Specify a different configuration file", .group = 2 },
357
{ .name = "userid", .key = 130,
358
.arg = "ID", .flags = 0,
359
.doc = "User ID the plugins will run as", .group = 3 },
360
{ .name = "groupid", .key = 131,
361
.arg = "ID", .flags = 0,
362
.doc = "Group ID the plugins will run as", .group = 3 },
363
{ .name = "debug", .key = 132,
364
.doc = "Debug mode", .group = 4 },
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 },
365
310
{ .name = NULL }
366
311
};
367
312
368
error_t parse_opt (int key, char *arg, __attribute__((unused))
369
struct argp_state *state) {
313
error_t parse_opt (int key, char *arg, struct argp_state *state) {
370
314
/* Get the INPUT argument from `argp_parse', which we know is a
371
315
pointer to our plugin list pointer. */
316
plugin **plugins = state->input;
372
317
switch (key) {
373
case 'g': /* --global-options */
318
case 'g':
374
319
if (arg != NULL){
375
320
char *p;
376
321
while((p = strsep(&arg, ",")) != NULL){
377
322
if(p[0] == '\0'){
378
323
continue;
379
324
}
380
if(not add_argument(getplugin(NULL), p)){
325
if(not add_argument(getplugin(NULL, plugins), p)){
381
326
perror("add_argument");
382
327
return ARGP_ERR_UNKNOWN;
383
328
}
384
329
}
385
330
}
386
331
break;
387
case 'e': /* --global-env */
332
case 'e':
388
333
if(arg == NULL){
389
334
break;
390
335
}
393
338
if(envdef == NULL){
394
339
break;
395
340
}
396
if(not add_environment(getplugin(NULL), envdef)){
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
397
342
perror("add_environment");
398
343
}
399
344
}
400
345
break;
401
case 'o': /* --options-for */
346
case 'o':
402
347
if (arg != NULL){
403
348
char *p_name = strsep(&arg, ":");
404
349
if(p_name[0] == '\0'){
414
359
if(p[0] == '\0'){
415
360
continue;
416
361
}
417
if(not add_argument(getplugin(p_name), p)){
362
if(not add_argument(getplugin(p_name, plugins), p)){
418
363
perror("add_argument");
419
364
return ARGP_ERR_UNKNOWN;
420
365
}
422
367
}
423
368
}
424
369
break;
425
case 'f': /* --env-for */
370
case 'f':
426
371
if(arg == NULL){
427
372
break;
428
373
}
436
381
break;
437
382
}
438
383
envdef++;
439
if(not add_environment(getplugin(p_name), envdef)){
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
440
385
perror("add_environment");
441
386
}
442
387
}
443
388
break;
444
case 'd': /* --disable */
389
case 'd':
445
390
if (arg != NULL){
446
plugin *p = getplugin(arg);
391
plugin *p = getplugin(arg, plugins);
447
392
if(p == NULL){
448
393
return ARGP_ERR_UNKNOWN;
449
394
}
450
395
p->disabled = true;
451
396
}
452
397
break;
453
case 128: /* --plugin-dir */
454
plugindir = strdup(arg);
455
if(plugindir == NULL){
456
perror("strdup");
457
}
398
case 128:
399
plugindir = arg;
458
400
break;
459
case 129: /* --config-file */
460
argfile = strdup(arg);
461
if(argfile == NULL){
462
perror("strdup");
463
}
464
break;
465
case 130: /* --userid */
401
case 129:
466
402
uid = (uid_t)strtol(arg, NULL, 10);
467
403
break;
468
case 131: /* --groupid */
404
case 130:
469
405
gid = (gid_t)strtol(arg, NULL, 10);
470
406
break;
471
case 132: /* --debug */
407
case 131:
472
408
debug = true;
473
409
break;
474
410
case ARGP_KEY_ARG:
482
418
return 0;
483
419
}
484
420
421
plugin *plugin_list = NULL;
422
485
423
struct argp argp = { .options = options, .parser = parse_opt,
486
424
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
487
425
.doc = "Mandos plugin runner -- Run plugins" };
488
426
489
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
427
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
490
428
if (ret == ARGP_ERR_UNKNOWN){
491
429
fprintf(stderr, "Unknown error while parsing arguments\n");
492
430
exitstatus = EXIT_FAILURE;
493
goto fallback;
431
goto end;
494
432
}
495
433
496
/* Opens the configfile if aviable */
497
if (argfile == NULL){
498
conffp = fopen(AFILE, "r");
499
} else {
500
conffp = fopen(argfile, "r");
501
}
434
conffp = fopen(argfile, "r");
502
435
if(conffp != NULL){
503
436
char *org_line = NULL;
504
char *p, *arg, *new_arg, *line;
505
437
size_t size = 0;
506
438
ssize_t sret;
439
char *p, *arg, *new_arg, *line;
507
440
const char whitespace_delims[] = " \r\t\f\v\n";
508
441
const char comment_delim[] = "#";
509
442
510
custom_argc = 1;
511
custom_argv = malloc(sizeof(char*) * 2);
512
if(custom_argv == NULL){
513
perror("malloc");
514
exitstatus = EXIT_FAILURE;
515
goto fallback;
516
}
517
custom_argv[0] = argv[0];
518
custom_argv[1] = NULL;
519
520
/* for each line in the config file, strip whitespace and ignore
521
commented text */
522
443
while(true){
523
444
sret = getline(&org_line, &size, conffp);
524
445
if(sret == -1){
532
453
continue;
533
454
}
534
455
new_arg = strdup(p);
535
if(new_arg == NULL){
536
perror("strdup");
537
exitstatus = EXIT_FAILURE;
538
free(org_line);
539
goto fallback;
540
}
541
542
custom_argc += 1;
543
custom_argv = realloc(custom_argv, sizeof(char *)
544
* ((unsigned int) custom_argc + 1));
545
if(custom_argv == NULL){
546
perror("realloc");
547
exitstatus = EXIT_FAILURE;
548
free(org_line);
549
goto fallback;
550
}
551
custom_argv[custom_argc-1] = new_arg;
552
custom_argv[custom_argc] = NULL;
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
}
553
462
}
554
463
}
555
464
free(org_line);
559
468
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
560
469
perror("fopen");
561
470
exitstatus = EXIT_FAILURE;
562
goto fallback;
471
goto end;
563
472
}
564
473
}
565
/* If there was any arguments from configuration file,
566
pass them to parser as command arguments */
474
567
475
if(custom_argv != NULL){
568
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
476
custom_argv[0] = argv[0];
477
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
569
478
if (ret == ARGP_ERR_UNKNOWN){
570
479
fprintf(stderr, "Unknown error while parsing arguments\n");
571
480
exitstatus = EXIT_FAILURE;
572
goto fallback;
481
goto end;
573
482
}
574
483
}
575
484
586
495
}
587
496
}
588
497
}
589
590
/* Strip permissions down to nobody */
498
591
499
ret = setuid(uid);
592
500
if (ret == -1){
593
501
perror("setuid");
594
}
502
}
503
595
504
setgid(gid);
596
505
if (ret == -1){
597
506
perror("setgid");
598
507
}
599
600
if (plugindir == NULL){
601
dir = opendir(PDIR);
602
} else {
603
dir = opendir(plugindir);
604
}
605
508
509
dir = opendir(plugindir);
606
510
if(dir == NULL){
607
511
perror("Could not open plugin dir");
608
512
exitstatus = EXIT_FAILURE;
609
goto fallback;
513
goto end;
610
514
}
611
515
612
516
/* Set the FD_CLOEXEC flag on the directory, if possible */
617
521
if(ret < 0){
618
522
perror("set_cloexec_flag");
619
523
exitstatus = EXIT_FAILURE;
620
goto fallback;
524
goto end;
621
525
}
622
526
}
623
527
}
624
528
625
529
FD_ZERO(&rfds_all);
626
627
/* Read and execute any executable in the plugin directory*/
530
628
531
while(true){
629
532
dirst = readdir(dir);
630
533
633
536
if (errno == EBADF){
634
537
perror("readdir");
635
538
exitstatus = EXIT_FAILURE;
636
goto fallback;
539
goto end;
637
540
}
638
541
break;
639
542
}
661
564
break;
662
565
}
663
566
}
567
664
568
if(bad_name){
665
569
continue;
666
570
}
571
667
572
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
668
573
size_t suf_len = strlen(*suf);
669
574
if((d_name_len >= suf_len)
696
601
free(filename);
697
602
continue;
698
603
}
699
700
/* Ignore non-executable files */
604
701
605
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
702
606
if(debug){
703
607
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
706
610
free(filename);
707
611
continue;
708
612
}
709
710
plugin *p = getplugin(dirst->d_name);
613
plugin *p = getplugin(dirst->d_name, &plugin_list);
711
614
if(p == NULL){
712
615
perror("getplugin");
713
616
free(filename);
723
626
}
724
627
{
725
628
/* Add global arguments to argument list for this plugin */
726
plugin *g = getplugin(NULL);
629
plugin *g = getplugin(NULL, &plugin_list);
727
630
if(g != NULL){
728
631
for(char **a = g->argv + 1; *a != NULL; a++){
729
632
if(not add_argument(p, *a)){
754
657
}
755
658
}
756
659
757
int pipefd[2];
660
int pipefd[2];
758
661
ret = pipe(pipefd);
759
662
if (ret == -1){
760
663
perror("pipe");
761
664
exitstatus = EXIT_FAILURE;
762
goto fallback;
665
goto end;
763
666
}
764
/* Ask OS to automatic close the pipe on exec */
765
667
ret = set_cloexec_flag(pipefd[0]);
766
668
if(ret < 0){
767
669
perror("set_cloexec_flag");
768
670
exitstatus = EXIT_FAILURE;
769
goto fallback;
671
goto end;
770
672
}
771
673
ret = set_cloexec_flag(pipefd[1]);
772
674
if(ret < 0){
773
675
perror("set_cloexec_flag");
774
676
exitstatus = EXIT_FAILURE;
775
goto fallback;
677
goto end;
776
678
}
777
679
/* Block SIGCHLD until process is safely in process list */
778
680
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
779
681
if(ret < 0){
780
682
perror("sigprocmask");
781
683
exitstatus = EXIT_FAILURE;
782
goto fallback;
684
goto end;
783
685
}
784
686
// Starting a new process to be watched
785
687
pid_t pid = fork();
786
688
if(pid == -1){
787
689
perror("fork");
788
690
exitstatus = EXIT_FAILURE;
789
goto fallback;
691
goto end;
790
692
}
791
693
if(pid == 0){
792
694
/* this is the child process */
825
727
}
826
728
/* no return */
827
729
}
828
/* Parent process */
829
close(pipefd[1]); /* Close unused write end of pipe */
730
/* parent process */
830
731
free(filename);
831
plugin *new_plugin = getplugin(dirst->d_name);
832
if (new_plugin == NULL){
833
perror("getplugin");
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");
834
736
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
835
737
if(ret < 0){
836
perror("sigprocmask");
738
perror("sigprocmask");
837
739
}
838
740
exitstatus = EXIT_FAILURE;
839
goto fallback;
741
goto end;
840
742
}
841
743
842
new_plugin->pid = pid;
843
new_plugin->fd = pipefd[0];
844
744
*new_process = (struct process){ .pid = pid,
745
.fd = pipefd[0],
746
.next = process_list };
747
// List handling
748
process_list = new_process;
845
749
/* Unblock SIGCHLD so signal handler can be run if this process
846
750
has already completed */
847
751
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
848
752
if(ret < 0){
849
753
perror("sigprocmask");
850
754
exitstatus = EXIT_FAILURE;
851
goto fallback;
852
}
853
854
FD_SET(new_plugin->fd, &rfds_all);
855
856
if (maxfd < new_plugin->fd){
857
maxfd = new_plugin->fd;
858
}
859
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);
860
776
}
861
777
862
778
closedir(dir);
863
779
dir = NULL;
864
865
for(plugin *p = plugin_list; p != NULL; p = p->next){
866
if(p->pid != 0){
867
break;
868
}
869
if(p->next == NULL){
870
fprintf(stderr, "No plugin processes started. Incorrect plugin"
871
" directory?\n");
872
free_plugin_list();
873
}
780
781
if (process_list == NULL){
782
fprintf(stderr, "No plugin processes started. Incorrect plugin"
783
" directory?\n");
784
process_list = NULL;
874
785
}
875
876
/* Main loop while running plugins exist */
877
while(plugin_list){
786
while(process_list){
878
787
fd_set rfds = rfds_all;
879
788
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
880
789
if (select_ret == -1){
881
790
perror("select");
882
791
exitstatus = EXIT_FAILURE;
883
goto fallback;
792
goto end;
884
793
}
885
794
/* OK, now either a process completed, or something can be read
886
795
from one of them */
887
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
796
for(process *proc = process_list; proc ; proc = proc->next){
888
797
/* Is this process completely done? */
889
798
if(proc->eof and proc->completed){
890
799
/* Only accept the plugin output if it exited cleanly */
891
800
if(not WIFEXITED(proc->status)
892
801
or WEXITSTATUS(proc->status) != 0){
893
802
/* Bad exit by plugin */
894
895
803
if(debug){
896
804
if(WIFEXITED(proc->status)){
897
805
fprintf(stderr, "Plugin %u exited with status %d\n",
906
814
(unsigned int) (proc->pid));
907
815
}
908
816
}
909
910
817
/* Remove the plugin */
911
818
FD_CLR(proc->fd, &rfds_all);
912
913
819
/* Block signal while modifying process_list */
914
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
820
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
915
821
if(ret < 0){
916
822
perror("sigprocmask");
917
823
exitstatus = EXIT_FAILURE;
918
goto fallback;
919
}
920
free_plugin(proc);
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
}
921
839
/* We are done modifying process list, so unblock signal */
922
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
923
841
NULL);
924
842
if(ret < 0){
925
843
perror("sigprocmask");
926
exitstatus = EXIT_FAILURE;
927
goto fallback;
928
}
929
930
if(plugin_list == NULL){
931
break;
932
}
933
continue;
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;
934
851
}
935
936
852
/* This process exited nicely, so print its buffer */
937
853
938
bool bret = print_out_password(proc->buffer,
939
proc->buffer_length);
854
bool bret = print_out_password(proc->buffer, proc->buffer_length);
940
855
if(not bret){
941
856
perror("print_out_password");
942
857
exitstatus = EXIT_FAILURE;
943
858
}
944
goto fallback;
859
goto end;
945
860
}
946
947
861
/* This process has not completed. Does it have any output? */
948
862
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
949
863
/* This process had nothing to say at this time */
956
870
if (proc->buffer == NULL){
957
871
perror("malloc");
958
872
exitstatus = EXIT_FAILURE;
959
goto fallback;
873
goto end;
960
874
}
961
875
proc->buffer_size += BUFFER_SIZE;
962
876
}
977
891
}
978
892
979
893
980
fallback:
894
end:
981
895
982
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
983
/* Fallback if all plugins failed, none are found or an error
984
occured */
896
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
897
/* Fallback if all plugins failed, none are found or an error occured */
985
898
bool bret;
986
899
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
987
900
char *passwordbuffer = getpass("Password: ");
989
902
if(not bret){
990
903
perror("print_out_password");
991
904
exitstatus = EXIT_FAILURE;
905
goto end;
992
906
}
993
907
}
994
908
995
909
/* Restore old signal handler */
996
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
997
if(ret == -1){
998
perror("sigaction");
999
exitstatus = EXIT_FAILURE;
1000
}
1001
1002
if(custom_argv != NULL){
1003
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1004
free(*arg);
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
}
1005
922
}
1006
free(custom_argv);
923
free(plugin_list->environ);
924
free(plugin_list);
1007
925
}
1008
926
1009
927
if(dir != NULL){
1011
929
}
1012
930
1013
931
/* Free the process list and kill the processes */
1014
for(plugin *p = plugin_list; p != NULL; p = p->next){
1015
if(p->pid != 0){
1016
close(p->fd);
1017
ret = kill(p->pid, SIGTERM);
1018
if(ret == -1 and errno != ESRCH){
1019
/* Set-uid proccesses might not get closed */
1020
perror("kill");
1021
}
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");
1022
939
}
940
free(process_list->buffer);
941
free(process_list);
1023
942
}
1024
943
1025
944
/* Wait for any remaining child processes to terminate */
1029
948
if(errno != ECHILD){
1030
949
perror("wait");
1031
950
}
1032
1033
free_plugin_list();
1034
1035
free(plugindir);
1036
free(argfile);
1037
951
1038
952
return exitstatus;
1039
953
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0