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- Committer: Teddy Hogeborn
- Date: 2008-09-01 16:53:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20080901165317-77dccp81zyqimt2j
* plugin-runner.c (add_environment): Override existing environment
variables when asked to do so.
All callers changed.
(main): Removed old argp.args_doc string. Parse argument file
before normal command line arguments. Use ARGP_IN_ORDER
flag in both calls to argp_parse. Do not strdup() strings
to be sent to add_environment().
* plugin-runner.xml (OPTIONS): Document "--global-env" and "--envs-for".
(FILES): Note that the config file is parsed before the command line
options.
variables when asked to do so.
All callers changed.
(main): Removed old argp.args_doc string. Parse argument file
before normal command line arguments. Use ARGP_IN_ORDER
flag in both calls to argp_parse. Do not strdup() strings
to be sent to add_environment().
* plugin-runner.xml (OPTIONS): Document "--global-env" and "--envs-for".
(FILES): Note that the config file is parsed before the command line
options.
- 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 = 'e',
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 = 'f',
321
354
.arg = "PLUGIN:ENV=value",
322
355
.doc = "Environment variable passed to specified plugin" },
323
356
{ .name = "disable", .key = 'd',
326
359
{ .name = "plugin-dir", .key = 128,
327
360
.arg = "DIRECTORY",
328
361
.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 },
362
{ .name = "config-file", .key = 129,
363
.arg = "FILE",
364
.doc = "Specify a different configuration file", .group = 2 },
365
{ .name = "userid", .key = 130,
366
.arg = "ID", .flags = 0,
367
.doc = "User ID the plugins will run as", .group = 3 },
368
{ .name = "groupid", .key = 131,
369
.arg = "ID", .flags = 0,
370
.doc = "Group ID the plugins will run as", .group = 3 },
371
{ .name = "debug", .key = 132,
372
.doc = "Debug mode", .group = 4 },
337
373
{ .name = NULL }
338
374
};
339
375
340
error_t parse_opt (int key, char *arg, struct argp_state *state) {
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
341
378
/* Get the INPUT argument from `argp_parse', which we know is a
342
379
pointer to our plugin list pointer. */
343
plugin **plugins = state->input;
344
380
switch (key) {
345
case 'g':
381
case 'g': /* --global-options */
346
382
if (arg != NULL){
347
383
char *p;
348
384
while((p = strsep(&arg, ",")) != NULL){
349
385
if(p[0] == '\0'){
350
386
continue;
351
387
}
352
if(not add_argument(getplugin(NULL, plugins), p)){
388
if(not add_argument(getplugin(NULL), p)){
353
389
perror("add_argument");
354
390
return ARGP_ERR_UNKNOWN;
355
391
}
356
392
}
357
393
}
358
394
break;
359
case 'e':
395
case 'e': /* --global-env */
360
396
if(arg == NULL){
361
397
break;
362
398
}
365
401
if(envdef == NULL){
366
402
break;
367
403
}
368
if(not add_environment(getplugin(NULL, plugins), envdef)){
404
if(not add_environment(getplugin(NULL), envdef, true)){
369
405
perror("add_environment");
370
406
}
371
407
}
372
408
break;
373
case 'o':
409
case 'o': /* --options-for */
374
410
if (arg != NULL){
375
411
char *p_name = strsep(&arg, ":");
376
412
if(p_name[0] == '\0'){
386
422
if(p[0] == '\0'){
387
423
continue;
388
424
}
389
if(not add_argument(getplugin(p_name, plugins), p)){
425
if(not add_argument(getplugin(p_name), p)){
390
426
perror("add_argument");
391
427
return ARGP_ERR_UNKNOWN;
392
428
}
394
430
}
395
431
}
396
432
break;
397
case 'f':
433
case 'f': /* --env-for */
398
434
if(arg == NULL){
399
435
break;
400
436
}
408
444
break;
409
445
}
410
446
envdef++;
411
if(not add_environment(getplugin(p_name, plugins), envdef)){
447
if(not add_environment(getplugin(p_name), envdef, true)){
412
448
perror("add_environment");
413
449
}
414
450
}
415
451
break;
416
case 'd':
452
case 'd': /* --disable */
417
453
if (arg != NULL){
418
plugin *p = getplugin(arg, plugins);
454
plugin *p = getplugin(arg);
419
455
if(p == NULL){
420
456
return ARGP_ERR_UNKNOWN;
421
457
}
422
458
p->disabled = true;
423
459
}
424
460
break;
425
case 128:
426
plugindir = arg;
461
case 128: /* --plugin-dir */
462
plugindir = strdup(arg);
463
if(plugindir == NULL){
464
perror("strdup");
465
}
427
466
break;
428
case 129:
467
case 129: /* --config-file */
468
argfile = strdup(arg);
469
if(argfile == NULL){
470
perror("strdup");
471
}
472
break;
473
case 130: /* --userid */
429
474
uid = (uid_t)strtol(arg, NULL, 10);
430
475
break;
431
case 130:
476
case 131: /* --groupid */
432
477
gid = (gid_t)strtol(arg, NULL, 10);
433
478
break;
434
case 131:
479
case 132: /* --debug */
435
480
debug = true;
436
481
break;
437
482
case ARGP_KEY_ARG:
445
490
return 0;
446
491
}
447
492
448
plugin *plugin_list = NULL;
449
450
493
struct argp argp = { .options = options, .parser = parse_opt,
451
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
494
.args_doc = "",
452
495
.doc = "Mandos plugin runner -- Run plugins" };
453
496
454
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
455
if (ret == ARGP_ERR_UNKNOWN){
456
fprintf(stderr, "Unknown error while parsing arguments\n");
457
exitstatus = EXIT_FAILURE;
458
goto fallback;
459
}
460
461
conffp = fopen(argfile, "r");
497
/* Open the configfile if available */
498
if (argfile == NULL){
499
conffp = fopen(AFILE, "r");
500
} else {
501
conffp = fopen(argfile, "r");
502
}
462
503
if(conffp != NULL){
463
504
char *org_line = NULL;
464
505
char *p, *arg, *new_arg, *line;
467
508
const char whitespace_delims[] = " \r\t\f\v\n";
468
509
const char comment_delim[] = "#";
469
510
511
custom_argc = 1;
512
custom_argv = malloc(sizeof(char*) * 2);
513
if(custom_argv == NULL){
514
perror("malloc");
515
exitstatus = EXIT_FAILURE;
516
goto fallback;
517
}
518
custom_argv[0] = argv[0];
519
custom_argv[1] = NULL;
520
521
/* for each line in the config file, strip whitespace and ignore
522
commented text */
470
523
while(true){
471
524
sret = getline(&org_line, &size, conffp);
472
525
if(sret == -1){
480
533
continue;
481
534
}
482
535
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
}
536
if(new_arg == NULL){
537
perror("strdup");
538
exitstatus = EXIT_FAILURE;
539
free(org_line);
540
goto fallback;
541
}
542
543
custom_argc += 1;
544
custom_argv = realloc(custom_argv, sizeof(char *)
545
* ((unsigned int) custom_argc + 1));
546
if(custom_argv == NULL){
547
perror("realloc");
548
exitstatus = EXIT_FAILURE;
549
free(org_line);
550
goto fallback;
551
}
552
custom_argv[custom_argc-1] = new_arg;
553
custom_argv[custom_argc] = NULL;
489
554
}
490
555
}
491
556
free(org_line);
492
} else{
557
} else {
493
558
/* Check for harmful errors and go to fallback. Other errors might
494
559
not affect opening plugins */
495
560
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
498
563
goto fallback;
499
564
}
500
565
}
501
566
/* If there was any arguments from configuration file,
567
pass them to parser as command arguments */
502
568
if(custom_argv != NULL){
503
custom_argv[0] = argv[0];
504
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
569
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
570
0, NULL);
505
571
if (ret == ARGP_ERR_UNKNOWN){
506
572
fprintf(stderr, "Unknown error while parsing arguments\n");
507
573
exitstatus = EXIT_FAILURE;
509
575
}
510
576
}
511
577
578
/* Parse actual command line arguments, to let them override the
579
config file */
580
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
581
if (ret == ARGP_ERR_UNKNOWN){
582
fprintf(stderr, "Unknown error while parsing arguments\n");
583
exitstatus = EXIT_FAILURE;
584
goto fallback;
585
}
586
512
587
if(debug){
513
588
for(plugin *p = plugin_list; p != NULL; p=p->next){
514
589
fprintf(stderr, "Plugin: %s has %d arguments\n",
523
598
}
524
599
}
525
600
601
/* Strip permissions down to nobody */
526
602
ret = setuid(uid);
527
603
if (ret == -1){
528
604
perror("setuid");
529
}
530
605
}
531
606
setgid(gid);
532
607
if (ret == -1){
533
608
perror("setgid");
534
609
}
535
610
536
dir = opendir(plugindir);
611
if (plugindir == NULL){
612
dir = opendir(PDIR);
613
} else {
614
dir = opendir(plugindir);
615
}
616
537
617
if(dir == NULL){
538
618
perror("Could not open plugin dir");
539
619
exitstatus = EXIT_FAILURE;
555
635
556
636
FD_ZERO(&rfds_all);
557
637
638
/* Read and execute any executable in the plugin directory*/
558
639
while(true){
559
640
dirst = readdir(dir);
560
641
561
// All directory entries have been processed
642
/* All directory entries have been processed */
562
643
if(dirst == NULL){
563
644
if (errno == EBADF){
564
645
perror("readdir");
570
651
571
652
d_name_len = strlen(dirst->d_name);
572
653
573
// Ignore dotfiles, backup files and other junk
654
/* Ignore dotfiles, backup files and other junk */
574
655
{
575
656
bool bad_name = false;
576
657
591
672
break;
592
673
}
593
674
}
594
595
675
if(bad_name){
596
676
continue;
597
677
}
598
599
678
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
600
679
size_t suf_len = strlen(*suf);
601
680
if((d_name_len >= suf_len)
628
707
free(filename);
629
708
continue;
630
709
}
631
710
711
/* Ignore non-executable files */
632
712
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
633
713
if(debug){
634
714
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
637
717
free(filename);
638
718
continue;
639
719
}
640
plugin *p = getplugin(dirst->d_name, &plugin_list);
720
721
plugin *p = getplugin(dirst->d_name);
641
722
if(p == NULL){
642
723
perror("getplugin");
643
724
free(filename);
653
734
}
654
735
{
655
736
/* Add global arguments to argument list for this plugin */
656
plugin *g = getplugin(NULL, &plugin_list);
737
plugin *g = getplugin(NULL);
657
738
if(g != NULL){
658
739
for(char **a = g->argv + 1; *a != NULL; a++){
659
740
if(not add_argument(p, *a)){
662
743
}
663
744
/* Add global environment variables */
664
745
for(char **e = g->environ; *e != NULL; e++){
665
if(not add_environment(p, *e)){
746
if(not add_environment(p, *e, false)){
666
747
perror("add_environment");
667
748
}
668
749
}
673
754
process, too. */
674
755
if(p->environ[0] != NULL){
675
756
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)){
757
if(not add_environment(p, *e, false)){
682
758
perror("add_environment");
683
759
}
684
760
}
691
767
exitstatus = EXIT_FAILURE;
692
768
goto fallback;
693
769
}
770
/* Ask OS to automatic close the pipe on exec */
694
771
ret = set_cloexec_flag(pipefd[0]);
695
772
if(ret < 0){
696
773
perror("set_cloexec_flag");
710
787
exitstatus = EXIT_FAILURE;
711
788
goto fallback;
712
789
}
713
// Starting a new process to be watched
790
/* Starting a new process to be watched */
714
791
pid_t pid = fork();
715
792
if(pid == -1){
716
793
perror("fork");
754
831
}
755
832
/* no return */
756
833
}
757
/* parent process */
834
/* Parent process */
835
close(pipefd[1]); /* Close unused write end of pipe */
758
836
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");
837
plugin *new_plugin = getplugin(dirst->d_name);
838
if (new_plugin == NULL){
839
perror("getplugin");
763
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
764
841
if(ret < 0){
765
perror("sigprocmask");
842
perror("sigprocmask");
766
843
}
767
844
exitstatus = EXIT_FAILURE;
768
845
goto fallback;
769
846
}
770
847
771
*new_process = (struct process){ .pid = pid,
772
.fd = pipefd[0],
773
.next = process_list };
774
// List handling
775
process_list = new_process;
848
new_plugin->pid = pid;
849
new_plugin->fd = pipefd[0];
850
776
851
/* Unblock SIGCHLD so signal handler can be run if this process
777
852
has already completed */
778
853
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
782
857
goto fallback;
783
858
}
784
859
785
FD_SET(new_process->fd, &rfds_all);
860
FD_SET(new_plugin->fd, &rfds_all);
786
861
787
if (maxfd < new_process->fd){
788
maxfd = new_process->fd;
862
if (maxfd < new_plugin->fd){
863
maxfd = new_plugin->fd;
789
864
}
790
865
791
866
}
792
867
793
free_plugin_list(plugin_list);
794
plugin_list = NULL;
795
796
868
closedir(dir);
797
869
dir = NULL;
798
799
if (process_list == NULL){
800
fprintf(stderr, "No plugin processes started. Incorrect plugin"
801
" directory?\n");
802
process_list = NULL;
870
871
for(plugin *p = plugin_list; p != NULL; p = p->next){
872
if(p->pid != 0){
873
break;
874
}
875
if(p->next == NULL){
876
fprintf(stderr, "No plugin processes started. Incorrect plugin"
877
" directory?\n");
878
free_plugin_list();
879
}
803
880
}
804
while(process_list){
881
882
/* Main loop while running plugins exist */
883
while(plugin_list){
805
884
fd_set rfds = rfds_all;
806
885
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
807
886
if (select_ret == -1){
811
890
}
812
891
/* OK, now either a process completed, or something can be read
813
892
from one of them */
814
for(process *proc = process_list; proc ; proc = proc->next){
893
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
815
894
/* Is this process completely done? */
816
895
if(proc->eof and proc->completed){
817
896
/* Only accept the plugin output if it exited cleanly */
818
897
if(not WIFEXITED(proc->status)
819
898
or WEXITSTATUS(proc->status) != 0){
820
899
/* Bad exit by plugin */
900
821
901
if(debug){
822
902
if(WIFEXITED(proc->status)){
823
903
fprintf(stderr, "Plugin %u exited with status %d\n",
832
912
(unsigned int) (proc->pid));
833
913
}
834
914
}
915
835
916
/* Remove the plugin */
836
917
FD_CLR(proc->fd, &rfds_all);
918
837
919
/* Block signal while modifying process_list */
838
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
920
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
839
921
if(ret < 0){
840
922
perror("sigprocmask");
841
923
exitstatus = EXIT_FAILURE;
842
924
goto fallback;
843
925
}
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
}
926
free_plugin(proc);
857
927
/* We are done modifying process list, so unblock signal */
858
928
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
859
929
NULL);
860
930
if(ret < 0){
861
931
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;
932
exitstatus = EXIT_FAILURE;
933
goto fallback;
934
}
935
936
if(plugin_list == NULL){
937
break;
938
}
939
continue;
869
940
}
941
870
942
/* This process exited nicely, so print its buffer */
871
943
872
bool bret = print_out_password(proc->buffer, proc->buffer_length);
944
bool bret = print_out_password(proc->buffer,
945
proc->buffer_length);
873
946
if(not bret){
874
947
perror("print_out_password");
875
948
exitstatus = EXIT_FAILURE;
876
949
}
877
950
goto fallback;
878
951
}
952
879
953
/* This process has not completed. Does it have any output? */
880
954
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
881
955
/* This process had nothing to say at this time */
911
985
912
986
fallback:
913
987
914
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
915
/* Fallback if all plugins failed, none are found or an error occured */
988
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
989
/* Fallback if all plugins failed, none are found or an error
990
occured */
916
991
bool bret;
917
992
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
918
993
char *passwordbuffer = getpass("Password: ");
931
1006
}
932
1007
933
1008
if(custom_argv != NULL){
934
for(char **arg = custom_argv; *arg != NULL; arg++){
1009
for(char **arg = custom_argv+1; *arg != NULL; arg++){
935
1010
free(*arg);
936
1011
}
937
1012
free(custom_argv);
938
1013
}
939
free_plugin_list(plugin_list);
940
1014
941
1015
if(dir != NULL){
942
1016
closedir(dir);
943
1017
}
944
1018
945
1019
/* 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");
1020
for(plugin *p = plugin_list; p != NULL; p = p->next){
1021
if(p->pid != 0){
1022
close(p->fd);
1023
ret = kill(p->pid, SIGTERM);
1024
if(ret == -1 and errno != ESRCH){
1025
/* Set-uid proccesses might not get closed */
1026
perror("kill");
1027
}
953
1028
}
954
free(process_list->buffer);
955
free(process_list);
956
1029
}
957
1030
958
1031
/* Wait for any remaining child processes to terminate */
962
1035
if(errno != ECHILD){
963
1036
perror("wait");
964
1037
}
1038
1039
free_plugin_list();
1040
1041
free(plugindir);
1042
free(argfile);
965
1043
966
1044
return exitstatus;
967
1045
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0