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- Committer: Teddy Hogeborn
- Date: 2008-08-25 07:52:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20080825075235-gq338t4ywhqhire8
* mandos-clients.conf.xml (DESCRIPTION): Do not imply that this is the
only configuration file of
mandos(8).
(OPTIONS): Note that unknown options are ignored. When describing
"checker", be more specific about exit codes, and refer
to PATH. When describing "secret", refer to
mandos-keygen(8), and note the relationship with
"secfile". Added synopsis to "secfile", and note
relationship with "secret". Added synopsis and more text
to "host".
(EXAMPLE): Remove Radix-64 checksum from "secret" option value.
(SEE ALSO): New section, refer to mandos(8), mandos-keygen(8), and
mandos.conf(5).
only configuration file of
mandos(8).
(OPTIONS): Note that unknown options are ignored. When describing
"checker", be more specific about exit codes, and refer
to PATH. When describing "secret", refer to
mandos-keygen(8), and note the relationship with
"secfile". Added synopsis to "secfile", and note
relationship with "secret". Added synopsis and more text
to "host".
(EXAMPLE): Remove Radix-64 checksum from "secret" option value.
(SEE ALSO): New section, refer to mandos(8), mandos-keygen(8), and
mandos.conf(5).
- files removed:
- .bzrignore
- files modified:
- Makefile
added
removed
plugin-runner.c
65
65
#include <errno.h> /* errno, EBADF */
66
66
67
67
#define BUFFER_SIZE 256
68
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
69
72
70
const char *argp_program_version = "plugin-runner 1.0";
73
71
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
72
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*/
73
struct process;
74
75
typedef struct process{
86
76
pid_t pid;
87
77
int fd;
88
78
char *buffer;
91
81
bool eof;
92
82
volatile bool completed;
93
83
volatile int status;
84
struct process *next;
85
} process;
86
87
typedef struct plugin{
88
char *name; /* can be NULL or any plugin name */
89
char **argv;
90
int argc;
91
char **environ;
92
int envc;
93
bool disabled;
94
94
struct plugin *next;
95
95
} plugin;
96
96
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){
97
static plugin *getplugin(char *name, plugin **plugin_list){
98
for (plugin *p = *plugin_list; p != NULL; p = p->next){
104
99
if ((p->name == name)
105
100
or (p->name and name and (strcmp(p->name, name) == 0))){
106
101
return p;
118
113
return NULL;
119
114
}
120
115
}
121
116
122
117
*new_plugin = (plugin) { .name = copy_name,
123
118
.argc = 1,
119
.envc = 0,
124
120
.disabled = false,
125
.next = plugin_list };
121
.next = *plugin_list };
126
122
127
123
new_plugin->argv = malloc(sizeof(char *) * 2);
128
124
if (new_plugin->argv == NULL){
132
128
}
133
129
new_plugin->argv[0] = copy_name;
134
130
new_plugin->argv[1] = NULL;
135
131
136
132
new_plugin->environ = malloc(sizeof(char *));
137
133
if(new_plugin->environ == NULL){
138
134
free(copy_name);
141
137
return NULL;
142
138
}
143
139
new_plugin->environ[0] = NULL;
144
145
140
/* Append the new plugin to the list */
146
plugin_list = new_plugin;
141
*plugin_list = new_plugin;
147
142
return new_plugin;
148
143
}
149
144
179
174
}
180
175
181
176
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def, bool replace){
177
static bool add_environment(plugin *p, const char *def){
183
178
if(p == NULL){
184
179
return false;
185
180
}
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
181
return add_to_char_array(def, &(p->environ), &(p->envc));
204
182
}
205
183
184
206
185
/*
207
186
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
187
* Descriptor Flags".
219
198
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
220
199
}
221
200
201
process *process_list = NULL;
222
202
223
203
/* Mark processes as completed when they exit, and save their exit
224
204
status. */
225
205
void handle_sigchld(__attribute__((unused)) int sig){
226
206
while(true){
227
plugin *proc = plugin_list;
207
process *proc = process_list;
228
208
int status;
229
209
pid_t pid = waitpid(-1, &status, WNOHANG);
230
210
if(pid == 0){
252
232
}
253
233
}
254
234
255
/* Prints out a password to stdout */
256
235
bool print_out_password(const char *buffer, size_t length){
257
236
ssize_t ret;
258
237
if(length>0 and buffer[length-1] == '\n'){
268
247
return true;
269
248
}
270
249
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
}
250
char **add_to_argv(char **argv, int *argc, char *arg){
251
if (argv == NULL){
252
*argc = 1;
253
argv = malloc(sizeof(char*) * 2);
254
if(argv == NULL){
255
return NULL;
295
256
}
296
}
297
298
free(plugin_node);
257
argv[0] = NULL; /* Will be set to argv[0] in main before
258
parsing */
259
argv[1] = NULL;
260
}
261
*argc += 1;
262
argv = realloc(argv, sizeof(char *)
263
* ((unsigned int) *argc + 1));
264
if(argv == NULL){
265
return NULL;
266
}
267
argv[*argc-1] = arg;
268
argv[*argc] = NULL;
269
return argv;
299
270
}
300
271
301
static void free_plugin_list(void){
302
while(plugin_list != NULL){
303
free_plugin(plugin_list);
272
static void free_plugin_list(plugin *plugin_list){
273
for(plugin *next; plugin_list != NULL; plugin_list = next){
274
next = plugin_list->next;
275
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
276
free(*arg);
277
}
278
free(plugin_list->argv);
279
for(char **env = plugin_list->environ; *env != NULL; env++){
280
free(*env);
281
}
282
free(plugin_list->environ);
283
free(plugin_list);
304
284
}
305
285
}
306
286
307
287
int main(int argc, char *argv[]){
308
char *plugindir = NULL;
309
char *argfile = NULL;
288
const char *plugindir = "/lib/mandos/plugins.d";
289
const char *argfile = ARGFILE;
310
290
FILE *conffp;
311
291
size_t d_name_len;
312
292
DIR *dir = NULL;
344
324
{ .name = "global-options", .key = 'g',
345
325
.arg = "OPTION[,OPTION[,...]]",
346
326
.doc = "Options passed to all plugins" },
347
{ .name = "global-env", .key = 'G',
327
{ .name = "global-envs", .key = 'e',
348
328
.arg = "VAR=value",
349
329
.doc = "Environment variable passed to all plugins" },
350
330
{ .name = "options-for", .key = 'o',
351
331
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
352
332
.doc = "Options passed only to specified plugin" },
353
{ .name = "env-for", .key = 'E',
333
{ .name = "envs-for", .key = 'f',
354
334
.arg = "PLUGIN:ENV=value",
355
335
.doc = "Environment variable passed to specified plugin" },
356
336
{ .name = "disable", .key = 'd',
357
337
.arg = "PLUGIN",
358
338
.doc = "Disable a specific plugin", .group = 1 },
359
{ .name = "enable", .key = 'e',
360
.arg = "PLUGIN",
361
.doc = "Enable a specific plugin", .group = 1 },
362
339
{ .name = "plugin-dir", .key = 128,
363
340
.arg = "DIRECTORY",
364
341
.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 },
342
{ .name = "userid", .key = 129,
343
.arg = "ID", .flags = 0,
344
.doc = "User ID the plugins will run as", .group = 2 },
345
{ .name = "groupid", .key = 130,
346
.arg = "ID", .flags = 0,
347
.doc = "Group ID the plugins will run as", .group = 2 },
348
{ .name = "debug", .key = 131,
349
.doc = "Debug mode", .group = 3 },
376
350
{ .name = NULL }
377
351
};
378
352
379
error_t parse_opt (int key, char *arg, __attribute__((unused))
380
struct argp_state *state) {
353
error_t parse_opt (int key, char *arg, struct argp_state *state) {
354
/* Get the INPUT argument from `argp_parse', which we know is a
355
pointer to our plugin list pointer. */
356
plugin **plugins = state->input;
381
357
switch (key) {
382
case 'g': /* --global-options */
358
case 'g':
383
359
if (arg != NULL){
384
360
char *p;
385
361
while((p = strsep(&arg, ",")) != NULL){
386
362
if(p[0] == '\0'){
387
363
continue;
388
364
}
389
if(not add_argument(getplugin(NULL), p)){
365
if(not add_argument(getplugin(NULL, plugins), p)){
390
366
perror("add_argument");
391
367
return ARGP_ERR_UNKNOWN;
392
368
}
393
369
}
394
370
}
395
371
break;
396
case 'G': /* --global-env */
372
case 'e':
397
373
if(arg == NULL){
398
374
break;
399
375
}
402
378
if(envdef == NULL){
403
379
break;
404
380
}
405
if(not add_environment(getplugin(NULL), envdef, true)){
381
if(not add_environment(getplugin(NULL, plugins), envdef)){
406
382
perror("add_environment");
407
383
}
408
384
}
409
385
break;
410
case 'o': /* --options-for */
386
case 'o':
411
387
if (arg != NULL){
412
388
char *p_name = strsep(&arg, ":");
413
389
if(p_name[0] == '\0'){
423
399
if(p[0] == '\0'){
424
400
continue;
425
401
}
426
if(not add_argument(getplugin(p_name), p)){
402
if(not add_argument(getplugin(p_name, plugins), p)){
427
403
perror("add_argument");
428
404
return ARGP_ERR_UNKNOWN;
429
405
}
431
407
}
432
408
}
433
409
break;
434
case 'E': /* --env-for */
410
case 'f':
435
411
if(arg == NULL){
436
412
break;
437
413
}
445
421
break;
446
422
}
447
423
envdef++;
448
if(not add_environment(getplugin(p_name), envdef, true)){
424
if(not add_environment(getplugin(p_name, plugins), envdef)){
449
425
perror("add_environment");
450
426
}
451
427
}
452
428
break;
453
case 'd': /* --disable */
429
case 'd':
454
430
if (arg != NULL){
455
plugin *p = getplugin(arg);
431
plugin *p = getplugin(arg, plugins);
456
432
if(p == NULL){
457
433
return ARGP_ERR_UNKNOWN;
458
434
}
459
435
p->disabled = true;
460
436
}
461
437
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 */
438
case 128:
439
plugindir = arg;
440
break;
441
case 129:
481
442
uid = (uid_t)strtol(arg, NULL, 10);
482
443
break;
483
case 131: /* --groupid */
444
case 130:
484
445
gid = (gid_t)strtol(arg, NULL, 10);
485
446
break;
486
case 132: /* --debug */
447
case 131:
487
448
debug = true;
488
449
break;
489
450
case ARGP_KEY_ARG:
497
458
return 0;
498
459
}
499
460
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
}
461
plugin *plugin_list = NULL;
531
462
532
struct argp argp = { .options = options,
533
.parser = parse_opt_config_file,
534
.args_doc = "",
463
struct argp argp = { .options = options, .parser = parse_opt,
464
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
535
465
.doc = "Mandos plugin runner -- Run plugins" };
536
466
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);
467
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
540
468
if (ret == ARGP_ERR_UNKNOWN){
541
469
fprintf(stderr, "Unknown error while parsing arguments\n");
542
470
exitstatus = EXIT_FAILURE;
543
471
goto fallback;
544
472
}
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
}
473
474
conffp = fopen(argfile, "r");
555
475
if(conffp != NULL){
556
476
char *org_line = NULL;
557
477
char *p, *arg, *new_arg, *line;
560
480
const char whitespace_delims[] = " \r\t\f\v\n";
561
481
const char comment_delim[] = "#";
562
482
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
483
while(true){
576
484
sret = getline(&org_line, &size, conffp);
577
485
if(sret == -1){
585
493
continue;
586
494
}
587
495
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;
496
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
497
if (custom_argv == NULL){
498
perror("add_to_argv");
499
exitstatus = EXIT_FAILURE;
500
goto fallback;
501
}
606
502
}
607
503
}
608
504
free(org_line);
609
} else {
505
} else{
610
506
/* Check for harmful errors and go to fallback. Other errors might
611
507
not affect opening plugins */
612
508
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
615
511
goto fallback;
616
512
}
617
513
}
618
/* If there was any arguments from configuration file,
619
pass them to parser as command arguments */
514
620
515
if(custom_argv != NULL){
621
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
622
0, NULL);
516
custom_argv[0] = argv[0];
517
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0,
518
&plugin_list);
623
519
if (ret == ARGP_ERR_UNKNOWN){
624
520
fprintf(stderr, "Unknown error while parsing arguments\n");
625
521
exitstatus = EXIT_FAILURE;
627
523
}
628
524
}
629
525
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
526
if(debug){
640
527
for(plugin *p = plugin_list; p != NULL; p=p->next){
641
528
fprintf(stderr, "Plugin: %s has %d arguments\n",
650
537
}
651
538
}
652
539
653
/* Strip permissions down to nobody */
654
540
ret = setuid(uid);
655
541
if (ret == -1){
656
542
perror("setuid");
657
}
543
}
544
658
545
setgid(gid);
659
546
if (ret == -1){
660
547
perror("setgid");
661
548
}
662
549
663
if (plugindir == NULL){
664
dir = opendir(PDIR);
665
} else {
666
dir = opendir(plugindir);
667
}
668
550
dir = opendir(plugindir);
669
551
if(dir == NULL){
670
552
perror("Could not open plugin dir");
671
553
exitstatus = EXIT_FAILURE;
687
569
688
570
FD_ZERO(&rfds_all);
689
571
690
/* Read and execute any executable in the plugin directory*/
691
572
while(true){
692
573
dirst = readdir(dir);
693
574
694
/* All directory entries have been processed */
575
// All directory entries have been processed
695
576
if(dirst == NULL){
696
577
if (errno == EBADF){
697
578
perror("readdir");
703
584
704
585
d_name_len = strlen(dirst->d_name);
705
586
706
/* Ignore dotfiles, backup files and other junk */
587
// Ignore dotfiles, backup files and other junk
707
588
{
708
589
bool bad_name = false;
709
590
724
605
break;
725
606
}
726
607
}
608
727
609
if(bad_name){
728
610
continue;
729
611
}
612
730
613
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
731
614
size_t suf_len = strlen(*suf);
732
615
if((d_name_len >= suf_len)
759
642
free(filename);
760
643
continue;
761
644
}
762
763
/* Ignore non-executable files */
645
764
646
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
765
647
if(debug){
766
648
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
769
651
free(filename);
770
652
continue;
771
653
}
772
773
plugin *p = getplugin(dirst->d_name);
654
plugin *p = getplugin(dirst->d_name, &plugin_list);
774
655
if(p == NULL){
775
656
perror("getplugin");
776
657
free(filename);
786
667
}
787
668
{
788
669
/* Add global arguments to argument list for this plugin */
789
plugin *g = getplugin(NULL);
670
plugin *g = getplugin(NULL, &plugin_list);
790
671
if(g != NULL){
791
672
for(char **a = g->argv + 1; *a != NULL; a++){
792
673
if(not add_argument(p, *a)){
795
676
}
796
677
/* Add global environment variables */
797
678
for(char **e = g->environ; *e != NULL; e++){
798
if(not add_environment(p, *e, false)){
679
if(not add_environment(p, *e)){
799
680
perror("add_environment");
800
681
}
801
682
}
806
687
process, too. */
807
688
if(p->environ[0] != NULL){
808
689
for(char **e = environ; *e != NULL; e++){
809
if(not add_environment(p, *e, false)){
690
char *copy = strdup(*e);
691
if(copy == NULL){
692
perror("strdup");
693
continue;
694
}
695
if(not add_environment(p, copy)){
810
696
perror("add_environment");
811
697
}
812
698
}
819
705
exitstatus = EXIT_FAILURE;
820
706
goto fallback;
821
707
}
822
/* Ask OS to automatic close the pipe on exec */
823
708
ret = set_cloexec_flag(pipefd[0]);
824
709
if(ret < 0){
825
710
perror("set_cloexec_flag");
839
724
exitstatus = EXIT_FAILURE;
840
725
goto fallback;
841
726
}
842
/* Starting a new process to be watched */
727
// Starting a new process to be watched
843
728
pid_t pid = fork();
844
729
if(pid == -1){
845
730
perror("fork");
883
768
}
884
769
/* no return */
885
770
}
886
/* Parent process */
887
close(pipefd[1]); /* Close unused write end of pipe */
771
/* parent process */
888
772
free(filename);
889
plugin *new_plugin = getplugin(dirst->d_name);
890
if (new_plugin == NULL){
891
perror("getplugin");
773
close(pipefd[1]); /* close unused write end of pipe */
774
process *new_process = malloc(sizeof(process));
775
if (new_process == NULL){
776
perror("malloc");
892
777
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
893
778
if(ret < 0){
894
perror("sigprocmask");
779
perror("sigprocmask");
895
780
}
896
781
exitstatus = EXIT_FAILURE;
897
782
goto fallback;
898
783
}
899
784
900
new_plugin->pid = pid;
901
new_plugin->fd = pipefd[0];
902
785
*new_process = (struct process){ .pid = pid,
786
.fd = pipefd[0],
787
.next = process_list };
788
// List handling
789
process_list = new_process;
903
790
/* Unblock SIGCHLD so signal handler can be run if this process
904
791
has already completed */
905
792
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
909
796
goto fallback;
910
797
}
911
798
912
FD_SET(new_plugin->fd, &rfds_all);
799
FD_SET(new_process->fd, &rfds_all);
913
800
914
if (maxfd < new_plugin->fd){
915
maxfd = new_plugin->fd;
801
if (maxfd < new_process->fd){
802
maxfd = new_process->fd;
916
803
}
917
804
918
805
}
919
806
807
free_plugin_list(plugin_list);
808
plugin_list = NULL;
809
920
810
closedir(dir);
921
811
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
}
812
813
if (process_list == NULL){
814
fprintf(stderr, "No plugin processes started. Incorrect plugin"
815
" directory?\n");
816
process_list = NULL;
932
817
}
933
934
/* Main loop while running plugins exist */
935
while(plugin_list){
818
while(process_list){
936
819
fd_set rfds = rfds_all;
937
820
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
938
821
if (select_ret == -1){
942
825
}
943
826
/* OK, now either a process completed, or something can be read
944
827
from one of them */
945
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
828
for(process *proc = process_list; proc ; proc = proc->next){
946
829
/* Is this process completely done? */
947
830
if(proc->eof and proc->completed){
948
831
/* Only accept the plugin output if it exited cleanly */
949
832
if(not WIFEXITED(proc->status)
950
833
or WEXITSTATUS(proc->status) != 0){
951
834
/* Bad exit by plugin */
952
953
835
if(debug){
954
836
if(WIFEXITED(proc->status)){
955
837
fprintf(stderr, "Plugin %u exited with status %d\n",
964
846
(unsigned int) (proc->pid));
965
847
}
966
848
}
967
968
849
/* Remove the plugin */
969
850
FD_CLR(proc->fd, &rfds_all);
970
971
851
/* Block signal while modifying process_list */
972
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
973
853
if(ret < 0){
975
855
exitstatus = EXIT_FAILURE;
976
856
goto fallback;
977
857
}
978
free_plugin(proc);
858
/* Delete this process entry from the list */
859
if(process_list == proc){
860
/* First one - simple */
861
process_list = proc->next;
862
} else {
863
/* Second one or later */
864
for(process *p = process_list; p != NULL; p = p->next){
865
if(p->next == proc){
866
p->next = proc->next;
867
break;
868
}
869
}
870
}
979
871
/* We are done modifying process list, so unblock signal */
980
872
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
981
873
NULL);
982
874
if(ret < 0){
983
875
perror("sigprocmask");
984
exitstatus = EXIT_FAILURE;
985
goto fallback;
986
}
987
988
if(plugin_list == NULL){
989
break;
990
}
991
continue;
876
}
877
free(proc->buffer);
878
free(proc);
879
/* We deleted this process from the list, so we can't go
880
proc->next. Therefore, start over from the beginning of
881
the process list */
882
break;
992
883
}
993
994
884
/* This process exited nicely, so print its buffer */
995
885
996
886
bool bret = print_out_password(proc->buffer,
1001
891
}
1002
892
goto fallback;
1003
893
}
1004
1005
894
/* This process has not completed. Does it have any output? */
1006
895
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1007
896
/* This process had nothing to say at this time */
1037
926
1038
927
fallback:
1039
928
1040
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
929
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1041
930
/* Fallback if all plugins failed, none are found or an error
1042
931
occured */
1043
932
bool bret;
1058
947
}
1059
948
1060
949
if(custom_argv != NULL){
1061
for(char **arg = custom_argv+1; *arg != NULL; arg++){
950
for(char **arg = custom_argv; *arg != NULL; arg++){
1062
951
free(*arg);
1063
952
}
1064
953
free(custom_argv);
1065
954
}
955
free_plugin_list(plugin_list);
1066
956
1067
957
if(dir != NULL){
1068
958
closedir(dir);
1069
959
}
1070
960
1071
961
/* 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
}
962
for(process *next; process_list != NULL; process_list = next){
963
next = process_list->next;
964
close(process_list->fd);
965
ret = kill(process_list->pid, SIGTERM);
966
if(ret == -1 and errno != ESRCH){
967
/* set-uid proccesses migth not get closed */
968
perror("kill");
1080
969
}
970
free(process_list->buffer);
971
free(process_list);
1081
972
}
1082
973
1083
974
/* Wait for any remaining child processes to terminate */
1087
978
if(errno != ECHILD){
1088
979
perror("wait");
1089
980
}
1090
1091
free_plugin_list();
1092
1093
free(plugindir);
1094
free(argfile);
1095
981
1096
982
return exitstatus;
1097
983
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0