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- Committer: Teddy Hogeborn
- Date: 2008-08-24 09:40:58 UTC
- Revision ID: teddy@fukt.bsnet.se-20080824094058-bdqng3t1e3hfnk2e
* plugin-runner.c (getplugin): Only copy "name" if not NULL. Free
"copy_name" if any error occurs.
(free_plugin_list): Do not free "name" member; it it freed as part
of argv.
(main): Set plugin_list to NULL after freeing it.
"copy_name" if any error occurs.
(free_plugin_list): Do not free "name" member; it it freed as part
of argv.
(main): Set plugin_list to NULL after freeing it.
- 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;
118
112
return NULL;
119
113
}
120
114
}
121
115
122
116
*new_plugin = (plugin) { .name = copy_name,
123
117
.argc = 1,
118
.envc = 0,
124
119
.disabled = false,
125
.next = plugin_list };
120
.next = *plugin_list };
126
121
127
122
new_plugin->argv = malloc(sizeof(char *) * 2);
128
123
if (new_plugin->argv == NULL){
132
127
}
133
128
new_plugin->argv[0] = copy_name;
134
129
new_plugin->argv[1] = NULL;
135
130
136
131
new_plugin->environ = malloc(sizeof(char *));
137
132
if(new_plugin->environ == NULL){
138
133
free(copy_name);
141
136
return NULL;
142
137
}
143
138
new_plugin->environ[0] = NULL;
144
145
139
/* Append the new plugin to the list */
146
plugin_list = new_plugin;
140
*plugin_list = new_plugin;
147
141
return new_plugin;
148
142
}
149
143
179
173
}
180
174
181
175
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def, bool replace){
176
static bool add_environment(plugin *p, const char *def){
183
177
if(p == NULL){
184
178
return false;
185
179
}
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));
194
if(new == NULL){
195
return false;
196
}
197
*e = new;
198
strcpy(*e, def);
199
}
200
return true;
201
}
202
}
203
180
return add_to_char_array(def, &(p->environ), &(p->envc));
204
181
}
205
182
183
206
184
/*
207
185
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
186
* Descriptor Flags".
219
197
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
220
198
}
221
199
200
process *process_list = NULL;
222
201
223
/* Mark processes as completed when they exit, and save their exit
202
/* Mark a process as completed when it exits, and save its exit
224
203
status. */
225
204
void handle_sigchld(__attribute__((unused)) int sig){
226
while(true){
227
plugin *proc = plugin_list;
228
int status;
229
pid_t pid = waitpid(-1, &status, WNOHANG);
230
if(pid == 0){
231
/* Only still running child processes */
232
break;
233
}
234
if(pid == -1){
235
if (errno != ECHILD){
236
perror("waitpid");
237
}
238
/* No child processes */
239
break;
240
}
241
242
/* A child exited, find it in process_list */
243
while(proc != NULL and proc->pid != pid){
244
proc = proc->next;
245
}
246
if(proc == NULL){
247
/* Process not found in process list */
248
continue;
249
}
250
proc->status = status;
251
proc->completed = true;
252
}
205
process *proc = process_list;
206
int status;
207
pid_t pid = wait(&status);
208
if(pid == -1){
209
perror("wait");
210
return;
211
}
212
while(proc != NULL and proc->pid != pid){
213
proc = proc->next;
214
}
215
if(proc == NULL){
216
/* Process not found in process list */
217
return;
218
}
219
proc->status = status;
220
proc->completed = true;
253
221
}
254
222
255
/* Prints out a password to stdout */
256
223
bool print_out_password(const char *buffer, size_t length){
257
224
ssize_t ret;
258
225
if(length>0 and buffer[length-1] == '\n'){
268
235
return true;
269
236
}
270
237
271
/* Removes and free a plugin from the plugin list */
272
static void free_plugin(plugin *plugin_node){
273
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
275
free(*arg);
276
}
277
free(plugin_node->argv);
278
for(char **env = plugin_node->environ; *env != NULL; env++){
279
free(*env);
280
}
281
free(plugin_node->environ);
282
free(plugin_node->buffer);
283
284
/* Removes the plugin from the singly-linked list */
285
if(plugin_node == plugin_list){
286
/* First one - simple */
287
plugin_list = plugin_list->next;
288
} else {
289
/* Second one or later */
290
for(plugin *p = plugin_list; p != NULL; p = p->next){
291
if(p->next == plugin_node){
292
p->next = plugin_node->next;
293
break;
294
}
238
char **add_to_argv(char **argv, int *argc, char *arg){
239
if (argv == NULL){
240
*argc = 1;
241
argv = malloc(sizeof(char*) * 2);
242
if(argv == NULL){
243
return NULL;
295
244
}
296
}
297
298
free(plugin_node);
245
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
246
argv[1] = NULL;
247
}
248
*argc += 1;
249
argv = realloc(argv, sizeof(char *)
250
* ((unsigned int) *argc + 1));
251
if(argv == NULL){
252
return NULL;
253
}
254
argv[*argc-1] = arg;
255
argv[*argc] = NULL;
256
return argv;
299
257
}
300
258
301
static void free_plugin_list(void){
302
while(plugin_list != NULL){
303
free_plugin(plugin_list);
259
static void free_plugin_list(plugin *plugin_list){
260
for(plugin *next; plugin_list != NULL; plugin_list = next){
261
next = plugin_list->next;
262
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
263
free(*arg);
264
}
265
free(plugin_list->argv);
266
for(char **env = plugin_list->environ; *env != NULL; env++){
267
free(*env);
268
}
269
free(plugin_list->environ);
270
free(plugin_list);
304
271
}
305
272
}
306
273
307
274
int main(int argc, char *argv[]){
308
char *plugindir = NULL;
309
char *argfile = NULL;
275
const char *plugindir = "/lib/mandos/plugins.d";
276
const char *argfile = ARGFILE;
310
277
FILE *conffp;
311
278
size_t d_name_len;
312
279
DIR *dir = NULL;
344
311
{ .name = "global-options", .key = 'g',
345
312
.arg = "OPTION[,OPTION[,...]]",
346
313
.doc = "Options passed to all plugins" },
347
{ .name = "global-env", .key = 'G',
314
{ .name = "global-envs", .key = 'e',
348
315
.arg = "VAR=value",
349
316
.doc = "Environment variable passed to all plugins" },
350
317
{ .name = "options-for", .key = 'o',
351
318
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
352
319
.doc = "Options passed only to specified plugin" },
353
{ .name = "env-for", .key = 'E',
320
{ .name = "envs-for", .key = 'f',
354
321
.arg = "PLUGIN:ENV=value",
355
322
.doc = "Environment variable passed to specified plugin" },
356
323
{ .name = "disable", .key = 'd',
357
324
.arg = "PLUGIN",
358
325
.doc = "Disable a specific plugin", .group = 1 },
359
{ .name = "enable", .key = 'e',
360
.arg = "PLUGIN",
361
.doc = "Enable a specific plugin", .group = 1 },
362
326
{ .name = "plugin-dir", .key = 128,
363
327
.arg = "DIRECTORY",
364
328
.doc = "Specify a different plugin directory", .group = 2 },
365
{ .name = "config-file", .key = 129,
366
.arg = "FILE",
367
.doc = "Specify a different configuration file", .group = 2 },
368
{ .name = "userid", .key = 130,
369
.arg = "ID", .flags = 0,
370
.doc = "User ID the plugins will run as", .group = 3 },
371
{ .name = "groupid", .key = 131,
372
.arg = "ID", .flags = 0,
373
.doc = "Group ID the plugins will run as", .group = 3 },
374
{ .name = "debug", .key = 132,
375
.doc = "Debug mode", .group = 4 },
329
{ .name = "userid", .key = 129,
330
.arg = "ID", .flags = 0,
331
.doc = "User ID the plugins will run as", .group = 2 },
332
{ .name = "groupid", .key = 130,
333
.arg = "ID", .flags = 0,
334
.doc = "Group ID the plugins will run as", .group = 2 },
335
{ .name = "debug", .key = 131,
336
.doc = "Debug mode", .group = 3 },
376
337
{ .name = NULL }
377
338
};
378
339
379
error_t parse_opt (int key, char *arg, __attribute__((unused))
380
struct argp_state *state) {
340
error_t parse_opt (int key, char *arg, struct argp_state *state) {
341
/* Get the INPUT argument from `argp_parse', which we know is a
342
pointer to our plugin list pointer. */
343
plugin **plugins = state->input;
381
344
switch (key) {
382
case 'g': /* --global-options */
345
case 'g':
383
346
if (arg != NULL){
384
347
char *p;
385
348
while((p = strsep(&arg, ",")) != NULL){
386
349
if(p[0] == '\0'){
387
350
continue;
388
351
}
389
if(not add_argument(getplugin(NULL), p)){
352
if(not add_argument(getplugin(NULL, plugins), p)){
390
353
perror("add_argument");
391
354
return ARGP_ERR_UNKNOWN;
392
355
}
393
356
}
394
357
}
395
358
break;
396
case 'G': /* --global-env */
359
case 'e':
397
360
if(arg == NULL){
398
361
break;
399
362
}
402
365
if(envdef == NULL){
403
366
break;
404
367
}
405
if(not add_environment(getplugin(NULL), envdef, true)){
368
if(not add_environment(getplugin(NULL, plugins), envdef)){
406
369
perror("add_environment");
407
370
}
408
371
}
409
372
break;
410
case 'o': /* --options-for */
373
case 'o':
411
374
if (arg != NULL){
412
375
char *p_name = strsep(&arg, ":");
413
376
if(p_name[0] == '\0'){
423
386
if(p[0] == '\0'){
424
387
continue;
425
388
}
426
if(not add_argument(getplugin(p_name), p)){
389
if(not add_argument(getplugin(p_name, plugins), p)){
427
390
perror("add_argument");
428
391
return ARGP_ERR_UNKNOWN;
429
392
}
431
394
}
432
395
}
433
396
break;
434
case 'E': /* --env-for */
397
case 'f':
435
398
if(arg == NULL){
436
399
break;
437
400
}
445
408
break;
446
409
}
447
410
envdef++;
448
if(not add_environment(getplugin(p_name), envdef, true)){
411
if(not add_environment(getplugin(p_name, plugins), envdef)){
449
412
perror("add_environment");
450
413
}
451
414
}
452
415
break;
453
case 'd': /* --disable */
416
case 'd':
454
417
if (arg != NULL){
455
plugin *p = getplugin(arg);
418
plugin *p = getplugin(arg, plugins);
456
419
if(p == NULL){
457
420
return ARGP_ERR_UNKNOWN;
458
421
}
459
422
p->disabled = true;
460
423
}
461
424
break;
462
case 'e': /* --enable */
463
if (arg != NULL){
464
plugin *p = getplugin(arg);
465
if(p == NULL){
466
return ARGP_ERR_UNKNOWN;
467
}
468
p->disabled = false;
469
}
470
break;
471
case 128: /* --plugin-dir */
472
plugindir = strdup(arg);
473
if(plugindir == NULL){
474
perror("strdup");
475
}
476
break;
477
case 129: /* --config-file */
478
/* This is already done by parse_opt_config_file() */
479
break;
480
case 130: /* --userid */
425
case 128:
426
plugindir = arg;
427
break;
428
case 129:
481
429
uid = (uid_t)strtol(arg, NULL, 10);
482
430
break;
483
case 131: /* --groupid */
431
case 130:
484
432
gid = (gid_t)strtol(arg, NULL, 10);
485
433
break;
486
case 132: /* --debug */
434
case 131:
487
435
debug = true;
488
436
break;
489
437
case ARGP_KEY_ARG:
497
445
return 0;
498
446
}
499
447
500
/* This option parser is the same as parse_opt() above, except it
501
ignores everything but the --config-file option. */
502
error_t parse_opt_config_file (int key, char *arg,
503
__attribute__((unused))
504
struct argp_state *state) {
505
switch (key) {
506
case 'g': /* --global-options */
507
case 'G': /* --global-env */
508
case 'o': /* --options-for */
509
case 'E': /* --env-for */
510
case 'd': /* --disable */
511
case 'e': /* --enable */
512
case 128: /* --plugin-dir */
513
break;
514
case 129: /* --config-file */
515
argfile = strdup(arg);
516
if(argfile == NULL){
517
perror("strdup");
518
}
519
break;
520
case 130: /* --userid */
521
case 131: /* --groupid */
522
case 132: /* --debug */
523
case ARGP_KEY_ARG:
524
case ARGP_KEY_END:
525
break;
526
default:
527
return ARGP_ERR_UNKNOWN;
528
}
529
return 0;
530
}
448
plugin *plugin_list = NULL;
531
449
532
struct argp argp = { .options = options,
533
.parser = parse_opt_config_file,
534
.args_doc = "",
450
struct argp argp = { .options = options, .parser = parse_opt,
451
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
535
452
.doc = "Mandos plugin runner -- Run plugins" };
536
453
537
/* Parse using the parse_opt_config_file in order to get the custom
538
config file location, if any. */
539
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
454
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
540
455
if (ret == ARGP_ERR_UNKNOWN){
541
456
fprintf(stderr, "Unknown error while parsing arguments\n");
542
457
exitstatus = EXIT_FAILURE;
543
458
goto fallback;
544
459
}
545
546
/* Reset to the normal argument parser */
547
argp.parser = parse_opt;
548
549
/* Open the configfile if available */
550
if (argfile == NULL){
551
conffp = fopen(AFILE, "r");
552
} else {
553
conffp = fopen(argfile, "r");
554
}
460
461
conffp = fopen(argfile, "r");
555
462
if(conffp != NULL){
556
463
char *org_line = NULL;
557
464
char *p, *arg, *new_arg, *line;
560
467
const char whitespace_delims[] = " \r\t\f\v\n";
561
468
const char comment_delim[] = "#";
562
469
563
custom_argc = 1;
564
custom_argv = malloc(sizeof(char*) * 2);
565
if(custom_argv == NULL){
566
perror("malloc");
567
exitstatus = EXIT_FAILURE;
568
goto fallback;
569
}
570
custom_argv[0] = argv[0];
571
custom_argv[1] = NULL;
572
573
/* for each line in the config file, strip whitespace and ignore
574
commented text */
575
470
while(true){
576
471
sret = getline(&org_line, &size, conffp);
577
472
if(sret == -1){
585
480
continue;
586
481
}
587
482
new_arg = strdup(p);
588
if(new_arg == NULL){
589
perror("strdup");
590
exitstatus = EXIT_FAILURE;
591
free(org_line);
592
goto fallback;
593
}
594
595
custom_argc += 1;
596
custom_argv = realloc(custom_argv, sizeof(char *)
597
* ((unsigned int) custom_argc + 1));
598
if(custom_argv == NULL){
599
perror("realloc");
600
exitstatus = EXIT_FAILURE;
601
free(org_line);
602
goto fallback;
603
}
604
custom_argv[custom_argc-1] = new_arg;
605
custom_argv[custom_argc] = NULL;
483
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
484
if (custom_argv == NULL){
485
perror("add_to_argv");
486
exitstatus = EXIT_FAILURE;
487
goto fallback;
488
}
606
489
}
607
490
}
608
491
free(org_line);
609
} else {
492
} else{
610
493
/* Check for harmful errors and go to fallback. Other errors might
611
494
not affect opening plugins */
612
495
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
615
498
goto fallback;
616
499
}
617
500
}
618
/* If there was any arguments from configuration file,
619
pass them to parser as command arguments */
501
620
502
if(custom_argv != NULL){
621
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
622
0, NULL);
503
custom_argv[0] = argv[0];
504
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
623
505
if (ret == ARGP_ERR_UNKNOWN){
624
506
fprintf(stderr, "Unknown error while parsing arguments\n");
625
507
exitstatus = EXIT_FAILURE;
627
509
}
628
510
}
629
511
630
/* Parse actual command line arguments, to let them override the
631
config file */
632
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
633
if (ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
exitstatus = EXIT_FAILURE;
636
goto fallback;
637
}
638
639
512
if(debug){
640
513
for(plugin *p = plugin_list; p != NULL; p=p->next){
641
514
fprintf(stderr, "Plugin: %s has %d arguments\n",
650
523
}
651
524
}
652
525
653
/* Strip permissions down to nobody */
654
526
ret = setuid(uid);
655
527
if (ret == -1){
656
528
perror("setuid");
657
}
529
}
530
658
531
setgid(gid);
659
532
if (ret == -1){
660
533
perror("setgid");
661
534
}
662
535
663
if (plugindir == NULL){
664
dir = opendir(PDIR);
665
} else {
666
dir = opendir(plugindir);
667
}
668
536
dir = opendir(plugindir);
669
537
if(dir == NULL){
670
538
perror("Could not open plugin dir");
671
539
exitstatus = EXIT_FAILURE;
687
555
688
556
FD_ZERO(&rfds_all);
689
557
690
/* Read and execute any executable in the plugin directory*/
691
558
while(true){
692
559
dirst = readdir(dir);
693
560
694
/* All directory entries have been processed */
561
// All directory entries have been processed
695
562
if(dirst == NULL){
696
563
if (errno == EBADF){
697
564
perror("readdir");
703
570
704
571
d_name_len = strlen(dirst->d_name);
705
572
706
/* Ignore dotfiles, backup files and other junk */
573
// Ignore dotfiles, backup files and other junk
707
574
{
708
575
bool bad_name = false;
709
576
724
591
break;
725
592
}
726
593
}
594
727
595
if(bad_name){
728
596
continue;
729
597
}
598
730
599
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
731
600
size_t suf_len = strlen(*suf);
732
601
if((d_name_len >= suf_len)
759
628
free(filename);
760
629
continue;
761
630
}
762
763
/* Ignore non-executable files */
631
764
632
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
765
633
if(debug){
766
634
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
769
637
free(filename);
770
638
continue;
771
639
}
772
773
plugin *p = getplugin(dirst->d_name);
640
plugin *p = getplugin(dirst->d_name, &plugin_list);
774
641
if(p == NULL){
775
642
perror("getplugin");
776
643
free(filename);
786
653
}
787
654
{
788
655
/* Add global arguments to argument list for this plugin */
789
plugin *g = getplugin(NULL);
656
plugin *g = getplugin(NULL, &plugin_list);
790
657
if(g != NULL){
791
658
for(char **a = g->argv + 1; *a != NULL; a++){
792
659
if(not add_argument(p, *a)){
795
662
}
796
663
/* Add global environment variables */
797
664
for(char **e = g->environ; *e != NULL; e++){
798
if(not add_environment(p, *e, false)){
665
if(not add_environment(p, *e)){
799
666
perror("add_environment");
800
667
}
801
668
}
806
673
process, too. */
807
674
if(p->environ[0] != NULL){
808
675
for(char **e = environ; *e != NULL; e++){
809
if(not add_environment(p, *e, false)){
676
char *copy = strdup(*e);
677
if(copy == NULL){
678
perror("strdup");
679
continue;
680
}
681
if(not add_environment(p, copy)){
810
682
perror("add_environment");
811
683
}
812
684
}
819
691
exitstatus = EXIT_FAILURE;
820
692
goto fallback;
821
693
}
822
/* Ask OS to automatic close the pipe on exec */
823
694
ret = set_cloexec_flag(pipefd[0]);
824
695
if(ret < 0){
825
696
perror("set_cloexec_flag");
839
710
exitstatus = EXIT_FAILURE;
840
711
goto fallback;
841
712
}
842
/* Starting a new process to be watched */
713
// Starting a new process to be watched
843
714
pid_t pid = fork();
844
715
if(pid == -1){
845
716
perror("fork");
883
754
}
884
755
/* no return */
885
756
}
886
/* Parent process */
887
close(pipefd[1]); /* Close unused write end of pipe */
757
/* parent process */
888
758
free(filename);
889
plugin *new_plugin = getplugin(dirst->d_name);
890
if (new_plugin == NULL){
891
perror("getplugin");
759
close(pipefd[1]); /* close unused write end of pipe */
760
process *new_process = malloc(sizeof(process));
761
if (new_process == NULL){
762
perror("malloc");
892
763
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
893
764
if(ret < 0){
894
perror("sigprocmask");
765
perror("sigprocmask");
895
766
}
896
767
exitstatus = EXIT_FAILURE;
897
768
goto fallback;
898
769
}
899
770
900
new_plugin->pid = pid;
901
new_plugin->fd = pipefd[0];
902
771
*new_process = (struct process){ .pid = pid,
772
.fd = pipefd[0],
773
.next = process_list };
774
// List handling
775
process_list = new_process;
903
776
/* Unblock SIGCHLD so signal handler can be run if this process
904
777
has already completed */
905
778
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
909
782
goto fallback;
910
783
}
911
784
912
FD_SET(new_plugin->fd, &rfds_all);
785
FD_SET(new_process->fd, &rfds_all);
913
786
914
if (maxfd < new_plugin->fd){
915
maxfd = new_plugin->fd;
787
if (maxfd < new_process->fd){
788
maxfd = new_process->fd;
916
789
}
917
790
918
791
}
919
792
793
free_plugin_list(plugin_list);
794
plugin_list = NULL;
795
920
796
closedir(dir);
921
797
dir = NULL;
922
923
for(plugin *p = plugin_list; p != NULL; p = p->next){
924
if(p->pid != 0){
925
break;
926
}
927
if(p->next == NULL){
928
fprintf(stderr, "No plugin processes started. Incorrect plugin"
929
" directory?\n");
930
free_plugin_list();
931
}
798
799
if (process_list == NULL){
800
fprintf(stderr, "No plugin processes started. Incorrect plugin"
801
" directory?\n");
802
process_list = NULL;
932
803
}
933
934
/* Main loop while running plugins exist */
935
while(plugin_list){
804
while(process_list){
936
805
fd_set rfds = rfds_all;
937
806
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
938
807
if (select_ret == -1){
942
811
}
943
812
/* OK, now either a process completed, or something can be read
944
813
from one of them */
945
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
814
for(process *proc = process_list; proc ; proc = proc->next){
946
815
/* Is this process completely done? */
947
816
if(proc->eof and proc->completed){
948
817
/* Only accept the plugin output if it exited cleanly */
949
818
if(not WIFEXITED(proc->status)
950
819
or WEXITSTATUS(proc->status) != 0){
951
820
/* Bad exit by plugin */
952
953
821
if(debug){
954
822
if(WIFEXITED(proc->status)){
955
823
fprintf(stderr, "Plugin %u exited with status %d\n",
964
832
(unsigned int) (proc->pid));
965
833
}
966
834
}
967
968
835
/* Remove the plugin */
969
836
FD_CLR(proc->fd, &rfds_all);
970
971
837
/* Block signal while modifying process_list */
972
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
838
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
973
839
if(ret < 0){
974
840
perror("sigprocmask");
975
841
exitstatus = EXIT_FAILURE;
976
842
goto fallback;
977
843
}
978
free_plugin(proc);
844
/* Delete this process entry from the list */
845
if(process_list == proc){
846
/* First one - simple */
847
process_list = proc->next;
848
} else {
849
/* Second one or later */
850
for(process *p = process_list; p != NULL; p = p->next){
851
if(p->next == proc){
852
p->next = proc->next;
853
break;
854
}
855
}
856
}
979
857
/* We are done modifying process list, so unblock signal */
980
858
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
981
859
NULL);
982
860
if(ret < 0){
983
861
perror("sigprocmask");
984
exitstatus = EXIT_FAILURE;
985
goto fallback;
986
}
987
988
if(plugin_list == NULL){
989
break;
990
}
991
continue;
862
}
863
free(proc->buffer);
864
free(proc);
865
/* We deleted this process from the list, so we can't go
866
proc->next. Therefore, start over from the beginning of
867
the process list */
868
break;
992
869
}
993
994
870
/* This process exited nicely, so print its buffer */
995
871
996
bool bret = print_out_password(proc->buffer,
997
proc->buffer_length);
872
bool bret = print_out_password(proc->buffer, proc->buffer_length);
998
873
if(not bret){
999
874
perror("print_out_password");
1000
875
exitstatus = EXIT_FAILURE;
1001
876
}
1002
877
goto fallback;
1003
878
}
1004
1005
879
/* This process has not completed. Does it have any output? */
1006
880
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1007
881
/* This process had nothing to say at this time */
1037
911
1038
912
fallback:
1039
913
1040
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1041
/* Fallback if all plugins failed, none are found or an error
1042
occured */
914
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
915
/* Fallback if all plugins failed, none are found or an error occured */
1043
916
bool bret;
1044
917
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1045
918
char *passwordbuffer = getpass("Password: ");
1058
931
}
1059
932
1060
933
if(custom_argv != NULL){
1061
for(char **arg = custom_argv+1; *arg != NULL; arg++){
934
for(char **arg = custom_argv; *arg != NULL; arg++){
1062
935
free(*arg);
1063
936
}
1064
937
free(custom_argv);
1065
938
}
939
free_plugin_list(plugin_list);
1066
940
1067
941
if(dir != NULL){
1068
942
closedir(dir);
1069
943
}
1070
944
1071
945
/* Free the process list and kill the processes */
1072
for(plugin *p = plugin_list; p != NULL; p = p->next){
1073
if(p->pid != 0){
1074
close(p->fd);
1075
ret = kill(p->pid, SIGTERM);
1076
if(ret == -1 and errno != ESRCH){
1077
/* Set-uid proccesses might not get closed */
1078
perror("kill");
1079
}
946
for(process *next; process_list != NULL; process_list = next){
947
next = process_list->next;
948
close(process_list->fd);
949
ret = kill(process_list->pid, SIGTERM);
950
if(ret == -1 and errno != ESRCH){
951
/* set-uid proccesses migth not get closed */
952
perror("kill");
1080
953
}
954
free(process_list->buffer);
955
free(process_list);
1081
956
}
1082
957
1083
958
/* Wait for any remaining child processes to terminate */
1087
962
if(errno != ECHILD){
1088
963
perror("wait");
1089
964
}
1090
1091
free_plugin_list();
1092
1093
free(plugindir);
1094
free(argfile);
1095
965
1096
966
return exitstatus;
1097
967
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0