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- Committer: Teddy Hogeborn
- Date: 2008-09-03 19:37:07 UTC
- Revision ID: teddy@fukt.bsnet.se-20080903193707-sas85ud9r37ubs9r
* mandos-clients.conf.xml (OPTIONS): Add info to all options about
whether it is a required or
optional.
whether it is a required or
optional.
- files added:
- .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, 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;
112
118
return NULL;
113
119
}
114
120
}
115
121
116
122
*new_plugin = (plugin) { .name = copy_name,
117
123
.argc = 1,
118
.envc = 0,
119
124
.disabled = false,
120
.next = *plugin_list };
125
.next = plugin_list };
121
126
122
127
new_plugin->argv = malloc(sizeof(char *) * 2);
123
128
if (new_plugin->argv == NULL){
127
132
}
128
133
new_plugin->argv[0] = copy_name;
129
134
new_plugin->argv[1] = NULL;
130
135
131
136
new_plugin->environ = malloc(sizeof(char *));
132
137
if(new_plugin->environ == NULL){
133
138
free(copy_name);
136
141
return NULL;
137
142
}
138
143
new_plugin->environ[0] = NULL;
144
139
145
/* Append the new plugin to the list */
140
*plugin_list = new_plugin;
146
plugin_list = new_plugin;
141
147
return new_plugin;
142
148
}
143
149
173
179
}
174
180
175
181
/* Add to a plugin's environment */
176
static bool add_environment(plugin *p, const char *def){
182
static bool add_environment(plugin *p, const char *def, bool replace){
177
183
if(p == NULL){
178
184
return false;
179
185
}
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
}
180
203
return add_to_char_array(def, &(p->environ), &(p->envc));
181
204
}
182
205
183
184
206
/*
185
207
* Based on the example in the GNU LibC manual chapter 13.13 "File
186
208
* Descriptor Flags".
197
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
198
220
}
199
221
200
process *process_list = NULL;
201
222
202
/* Mark a process as completed when it exits, and save its exit
223
/* Mark processes as completed when they exit, and save their exit
203
224
status. */
204
225
void handle_sigchld(__attribute__((unused)) int sig){
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;
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
}
221
253
}
222
254
255
/* Prints out a password to stdout */
223
256
bool print_out_password(const char *buffer, size_t length){
224
257
ssize_t ret;
225
258
if(length>0 and buffer[length-1] == '\n'){
235
268
return true;
236
269
}
237
270
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;
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
}
244
295
}
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;
296
}
297
298
free(plugin_node);
257
299
}
258
300
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);
301
static void free_plugin_list(void){
302
while(plugin_list != NULL){
303
free_plugin(plugin_list);
271
304
}
272
305
}
273
306
274
307
int main(int argc, char *argv[]){
275
const char *plugindir = "/lib/mandos/plugins.d";
276
const char *argfile = ARGFILE;
308
char *plugindir = NULL;
309
char *argfile = NULL;
277
310
FILE *conffp;
278
311
size_t d_name_len;
279
312
DIR *dir = NULL;
311
344
{ .name = "global-options", .key = 'g',
312
345
.arg = "OPTION[,OPTION[,...]]",
313
346
.doc = "Options passed to all plugins" },
314
{ .name = "global-envs", .key = 'e',
347
{ .name = "global-env", .key = 'G',
315
348
.arg = "VAR=value",
316
349
.doc = "Environment variable passed to all plugins" },
317
350
{ .name = "options-for", .key = 'o',
318
351
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
319
352
.doc = "Options passed only to specified plugin" },
320
{ .name = "envs-for", .key = 'f',
353
{ .name = "env-for", .key = 'E',
321
354
.arg = "PLUGIN:ENV=value",
322
355
.doc = "Environment variable passed to specified plugin" },
323
356
{ .name = "disable", .key = 'd',
324
357
.arg = "PLUGIN",
325
358
.doc = "Disable a specific plugin", .group = 1 },
359
{ .name = "enable", .key = 'e',
360
.arg = "PLUGIN",
361
.doc = "Enable a specific plugin", .group = 1 },
326
362
{ .name = "plugin-dir", .key = 128,
327
363
.arg = "DIRECTORY",
328
364
.doc = "Specify a different plugin directory", .group = 2 },
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 },
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 },
337
376
{ .name = NULL }
338
377
};
339
378
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;
379
error_t parse_opt (int key, char *arg, __attribute__((unused))
380
struct argp_state *state) {
344
381
switch (key) {
345
case 'g':
382
case 'g': /* --global-options */
346
383
if (arg != NULL){
347
384
char *p;
348
385
while((p = strsep(&arg, ",")) != NULL){
349
386
if(p[0] == '\0'){
350
387
continue;
351
388
}
352
if(not add_argument(getplugin(NULL, plugins), p)){
389
if(not add_argument(getplugin(NULL), p)){
353
390
perror("add_argument");
354
391
return ARGP_ERR_UNKNOWN;
355
392
}
356
393
}
357
394
}
358
395
break;
359
case 'e':
396
case 'G': /* --global-env */
360
397
if(arg == NULL){
361
398
break;
362
399
}
365
402
if(envdef == NULL){
366
403
break;
367
404
}
368
if(not add_environment(getplugin(NULL, plugins), envdef)){
405
if(not add_environment(getplugin(NULL), envdef, true)){
369
406
perror("add_environment");
370
407
}
371
408
}
372
409
break;
373
case 'o':
410
case 'o': /* --options-for */
374
411
if (arg != NULL){
375
412
char *p_name = strsep(&arg, ":");
376
413
if(p_name[0] == '\0'){
386
423
if(p[0] == '\0'){
387
424
continue;
388
425
}
389
if(not add_argument(getplugin(p_name, plugins), p)){
426
if(not add_argument(getplugin(p_name), p)){
390
427
perror("add_argument");
391
428
return ARGP_ERR_UNKNOWN;
392
429
}
394
431
}
395
432
}
396
433
break;
397
case 'f':
434
case 'E': /* --env-for */
398
435
if(arg == NULL){
399
436
break;
400
437
}
408
445
break;
409
446
}
410
447
envdef++;
411
if(not add_environment(getplugin(p_name, plugins), envdef)){
448
if(not add_environment(getplugin(p_name), envdef, true)){
412
449
perror("add_environment");
413
450
}
414
451
}
415
452
break;
416
case 'd':
453
case 'd': /* --disable */
417
454
if (arg != NULL){
418
plugin *p = getplugin(arg, plugins);
455
plugin *p = getplugin(arg);
419
456
if(p == NULL){
420
457
return ARGP_ERR_UNKNOWN;
421
458
}
422
459
p->disabled = true;
423
460
}
424
461
break;
425
case 128:
426
plugindir = arg;
427
break;
428
case 129:
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 */
429
481
uid = (uid_t)strtol(arg, NULL, 10);
430
482
break;
431
case 130:
483
case 131: /* --groupid */
432
484
gid = (gid_t)strtol(arg, NULL, 10);
433
485
break;
434
case 131:
486
case 132: /* --debug */
435
487
debug = true;
436
488
break;
437
489
case ARGP_KEY_ARG:
445
497
return 0;
446
498
}
447
499
448
plugin *plugin_list = NULL;
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
}
449
531
450
struct argp argp = { .options = options, .parser = parse_opt,
451
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
532
struct argp argp = { .options = options,
533
.parser = parse_opt_config_file,
534
.args_doc = "",
452
535
.doc = "Mandos plugin runner -- Run plugins" };
453
536
454
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
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);
455
540
if (ret == ARGP_ERR_UNKNOWN){
456
541
fprintf(stderr, "Unknown error while parsing arguments\n");
457
542
exitstatus = EXIT_FAILURE;
458
543
goto fallback;
459
544
}
460
461
conffp = fopen(argfile, "r");
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
}
462
555
if(conffp != NULL){
463
556
char *org_line = NULL;
464
557
char *p, *arg, *new_arg, *line;
467
560
const char whitespace_delims[] = " \r\t\f\v\n";
468
561
const char comment_delim[] = "#";
469
562
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 */
470
575
while(true){
471
576
sret = getline(&org_line, &size, conffp);
472
577
if(sret == -1){
480
585
continue;
481
586
}
482
587
new_arg = strdup(p);
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
}
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;
489
606
}
490
607
}
491
608
free(org_line);
492
} else{
609
} else {
493
610
/* Check for harmful errors and go to fallback. Other errors might
494
611
not affect opening plugins */
495
612
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
498
615
goto fallback;
499
616
}
500
617
}
501
618
/* If there was any arguments from configuration file,
619
pass them to parser as command arguments */
502
620
if(custom_argv != NULL){
503
custom_argv[0] = argv[0];
504
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
621
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
622
0, NULL);
505
623
if (ret == ARGP_ERR_UNKNOWN){
506
624
fprintf(stderr, "Unknown error while parsing arguments\n");
507
625
exitstatus = EXIT_FAILURE;
509
627
}
510
628
}
511
629
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
512
639
if(debug){
513
640
for(plugin *p = plugin_list; p != NULL; p=p->next){
514
641
fprintf(stderr, "Plugin: %s has %d arguments\n",
523
650
}
524
651
}
525
652
653
/* Strip permissions down to nobody */
526
654
ret = setuid(uid);
527
655
if (ret == -1){
528
656
perror("setuid");
529
}
530
657
}
531
658
setgid(gid);
532
659
if (ret == -1){
533
660
perror("setgid");
534
661
}
535
662
536
dir = opendir(plugindir);
663
if (plugindir == NULL){
664
dir = opendir(PDIR);
665
} else {
666
dir = opendir(plugindir);
667
}
668
537
669
if(dir == NULL){
538
670
perror("Could not open plugin dir");
539
671
exitstatus = EXIT_FAILURE;
555
687
556
688
FD_ZERO(&rfds_all);
557
689
690
/* Read and execute any executable in the plugin directory*/
558
691
while(true){
559
692
dirst = readdir(dir);
560
693
561
// All directory entries have been processed
694
/* All directory entries have been processed */
562
695
if(dirst == NULL){
563
696
if (errno == EBADF){
564
697
perror("readdir");
570
703
571
704
d_name_len = strlen(dirst->d_name);
572
705
573
// Ignore dotfiles, backup files and other junk
706
/* Ignore dotfiles, backup files and other junk */
574
707
{
575
708
bool bad_name = false;
576
709
591
724
break;
592
725
}
593
726
}
594
595
727
if(bad_name){
596
728
continue;
597
729
}
598
599
730
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
600
731
size_t suf_len = strlen(*suf);
601
732
if((d_name_len >= suf_len)
628
759
free(filename);
629
760
continue;
630
761
}
631
762
763
/* Ignore non-executable files */
632
764
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
633
765
if(debug){
634
766
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
637
769
free(filename);
638
770
continue;
639
771
}
640
plugin *p = getplugin(dirst->d_name, &plugin_list);
772
773
plugin *p = getplugin(dirst->d_name);
641
774
if(p == NULL){
642
775
perror("getplugin");
643
776
free(filename);
653
786
}
654
787
{
655
788
/* Add global arguments to argument list for this plugin */
656
plugin *g = getplugin(NULL, &plugin_list);
789
plugin *g = getplugin(NULL);
657
790
if(g != NULL){
658
791
for(char **a = g->argv + 1; *a != NULL; a++){
659
792
if(not add_argument(p, *a)){
662
795
}
663
796
/* Add global environment variables */
664
797
for(char **e = g->environ; *e != NULL; e++){
665
if(not add_environment(p, *e)){
798
if(not add_environment(p, *e, false)){
666
799
perror("add_environment");
667
800
}
668
801
}
673
806
process, too. */
674
807
if(p->environ[0] != NULL){
675
808
for(char **e = environ; *e != NULL; e++){
676
char *copy = strdup(*e);
677
if(copy == NULL){
678
perror("strdup");
679
continue;
680
}
681
if(not add_environment(p, copy)){
809
if(not add_environment(p, *e, false)){
682
810
perror("add_environment");
683
811
}
684
812
}
691
819
exitstatus = EXIT_FAILURE;
692
820
goto fallback;
693
821
}
822
/* Ask OS to automatic close the pipe on exec */
694
823
ret = set_cloexec_flag(pipefd[0]);
695
824
if(ret < 0){
696
825
perror("set_cloexec_flag");
710
839
exitstatus = EXIT_FAILURE;
711
840
goto fallback;
712
841
}
713
// Starting a new process to be watched
842
/* Starting a new process to be watched */
714
843
pid_t pid = fork();
715
844
if(pid == -1){
716
845
perror("fork");
754
883
}
755
884
/* no return */
756
885
}
757
/* parent process */
886
/* Parent process */
887
close(pipefd[1]); /* Close unused write end of pipe */
758
888
free(filename);
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");
889
plugin *new_plugin = getplugin(dirst->d_name);
890
if (new_plugin == NULL){
891
perror("getplugin");
763
892
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
764
893
if(ret < 0){
765
perror("sigprocmask");
894
perror("sigprocmask");
766
895
}
767
896
exitstatus = EXIT_FAILURE;
768
897
goto fallback;
769
898
}
770
899
771
*new_process = (struct process){ .pid = pid,
772
.fd = pipefd[0],
773
.next = process_list };
774
// List handling
775
process_list = new_process;
900
new_plugin->pid = pid;
901
new_plugin->fd = pipefd[0];
902
776
903
/* Unblock SIGCHLD so signal handler can be run if this process
777
904
has already completed */
778
905
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
782
909
goto fallback;
783
910
}
784
911
785
FD_SET(new_process->fd, &rfds_all);
912
FD_SET(new_plugin->fd, &rfds_all);
786
913
787
if (maxfd < new_process->fd){
788
maxfd = new_process->fd;
914
if (maxfd < new_plugin->fd){
915
maxfd = new_plugin->fd;
789
916
}
790
917
791
918
}
792
919
793
free_plugin_list(plugin_list);
794
plugin_list = NULL;
795
796
920
closedir(dir);
797
921
dir = NULL;
798
799
if (process_list == NULL){
800
fprintf(stderr, "No plugin processes started. Incorrect plugin"
801
" directory?\n");
802
process_list = 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
}
803
932
}
804
while(process_list){
933
934
/* Main loop while running plugins exist */
935
while(plugin_list){
805
936
fd_set rfds = rfds_all;
806
937
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
807
938
if (select_ret == -1){
811
942
}
812
943
/* OK, now either a process completed, or something can be read
813
944
from one of them */
814
for(process *proc = process_list; proc ; proc = proc->next){
945
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
815
946
/* Is this process completely done? */
816
947
if(proc->eof and proc->completed){
817
948
/* Only accept the plugin output if it exited cleanly */
818
949
if(not WIFEXITED(proc->status)
819
950
or WEXITSTATUS(proc->status) != 0){
820
951
/* Bad exit by plugin */
952
821
953
if(debug){
822
954
if(WIFEXITED(proc->status)){
823
955
fprintf(stderr, "Plugin %u exited with status %d\n",
832
964
(unsigned int) (proc->pid));
833
965
}
834
966
}
967
835
968
/* Remove the plugin */
836
969
FD_CLR(proc->fd, &rfds_all);
970
837
971
/* Block signal while modifying process_list */
838
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
972
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
839
973
if(ret < 0){
840
974
perror("sigprocmask");
841
975
exitstatus = EXIT_FAILURE;
842
976
goto fallback;
843
977
}
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
}
978
free_plugin(proc);
857
979
/* We are done modifying process list, so unblock signal */
858
980
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
859
981
NULL);
860
982
if(ret < 0){
861
983
perror("sigprocmask");
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;
984
exitstatus = EXIT_FAILURE;
985
goto fallback;
986
}
987
988
if(plugin_list == NULL){
989
break;
990
}
991
continue;
869
992
}
993
870
994
/* This process exited nicely, so print its buffer */
871
995
872
bool bret = print_out_password(proc->buffer, proc->buffer_length);
996
bool bret = print_out_password(proc->buffer,
997
proc->buffer_length);
873
998
if(not bret){
874
999
perror("print_out_password");
875
1000
exitstatus = EXIT_FAILURE;
876
1001
}
877
1002
goto fallback;
878
1003
}
1004
879
1005
/* This process has not completed. Does it have any output? */
880
1006
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
881
1007
/* This process had nothing to say at this time */
911
1037
912
1038
fallback:
913
1039
914
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
915
/* Fallback if all plugins failed, none are found or an error occured */
1040
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1041
/* Fallback if all plugins failed, none are found or an error
1042
occured */
916
1043
bool bret;
917
1044
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
918
1045
char *passwordbuffer = getpass("Password: ");
931
1058
}
932
1059
933
1060
if(custom_argv != NULL){
934
for(char **arg = custom_argv; *arg != NULL; arg++){
1061
for(char **arg = custom_argv+1; *arg != NULL; arg++){
935
1062
free(*arg);
936
1063
}
937
1064
free(custom_argv);
938
1065
}
939
free_plugin_list(plugin_list);
940
1066
941
1067
if(dir != NULL){
942
1068
closedir(dir);
943
1069
}
944
1070
945
1071
/* Free the process list and kill the processes */
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");
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
}
953
1080
}
954
free(process_list->buffer);
955
free(process_list);
956
1081
}
957
1082
958
1083
/* Wait for any remaining child processes to terminate */
962
1087
if(errno != ECHILD){
963
1088
perror("wait");
964
1089
}
1090
1091
free_plugin_list();
1092
1093
free(plugindir);
1094
free(argfile);
965
1095
966
1096
return exitstatus;
967
1097
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0