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- Committer: Teddy Hogeborn
- Date: 2008-09-07 01:44:44 UTC
- mfrom: (24.1.93 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080907014444-cf4ilzndc0tbn8va
Merge & resolve.
- files added:
- .bzrignore
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
plugin-runner.c
65
65
#include <errno.h> /* errno, EBADF */
66
66
67
67
#define BUFFER_SIZE 256
68
#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"
69
71
70
72
const char *argp_program_version = "plugin-runner 1.0";
71
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
72
74
73
struct process;
74
75
typedef struct process{
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*/
76
86
pid_t pid;
77
87
int fd;
78
88
char *buffer;
81
91
bool eof;
82
92
volatile bool completed;
83
93
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 *getplugin(char *name, plugin **plugin_list){
98
for (plugin *p = *plugin_list; p != NULL; p = p->next){
97
static plugin *plugin_list = NULL;
98
99
/* Gets an 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){
99
104
if ((p->name == name)
100
105
or (p->name and name and (strcmp(p->name, name) == 0))){
101
106
return p;
116
121
117
122
*new_plugin = (plugin) { .name = copy_name,
118
123
.argc = 1,
119
.envc = 0,
120
124
.disabled = false,
121
.next = *plugin_list };
125
.next = plugin_list };
122
126
123
127
new_plugin->argv = malloc(sizeof(char *) * 2);
124
128
if (new_plugin->argv == NULL){
128
132
}
129
133
new_plugin->argv[0] = copy_name;
130
134
new_plugin->argv[1] = NULL;
131
135
132
136
new_plugin->environ = malloc(sizeof(char *));
133
137
if(new_plugin->environ == NULL){
134
138
free(copy_name);
137
141
return NULL;
138
142
}
139
143
new_plugin->environ[0] = NULL;
144
140
145
/* Append the new plugin to the list */
141
*plugin_list = new_plugin;
146
plugin_list = new_plugin;
142
147
return new_plugin;
143
148
}
144
149
174
179
}
175
180
176
181
/* Add to a plugin's environment */
177
static bool add_environment(plugin *p, const char *def){
182
static bool add_environment(plugin *p, const char *def, bool replace){
178
183
if(p == NULL){
179
184
return false;
180
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) + 1);
194
if(new == NULL){
195
return false;
196
}
197
*e = new;
198
strcpy(*e, def);
199
}
200
return true;
201
}
202
}
181
203
return add_to_char_array(def, &(p->environ), &(p->envc));
182
204
}
183
205
184
185
206
/*
186
207
* Based on the example in the GNU LibC manual chapter 13.13 "File
187
208
* Descriptor Flags".
198
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
199
220
}
200
221
201
process *process_list = NULL;
202
222
203
223
/* Mark processes as completed when they exit, and save their exit
204
224
status. */
205
225
void handle_sigchld(__attribute__((unused)) int sig){
206
226
while(true){
207
process *proc = process_list;
227
plugin *proc = plugin_list;
208
228
int status;
209
229
pid_t pid = waitpid(-1, &status, WNOHANG);
210
230
if(pid == 0){
218
238
/* No child processes */
219
239
break;
220
240
}
221
241
222
242
/* A child exited, find it in process_list */
223
243
while(proc != NULL and proc->pid != pid){
224
244
proc = proc->next;
232
252
}
233
253
}
234
254
255
/* Prints out a password to stdout */
235
256
bool print_out_password(const char *buffer, size_t length){
236
257
ssize_t ret;
237
if(length>0 and buffer[length-1] == '\n'){
238
length--;
239
}
240
258
for(size_t written = 0; written < length; written += (size_t)ret){
241
259
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
242
260
length - written));
247
265
return true;
248
266
}
249
267
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;
268
/* Removes and free a plugin from the plugin list */
269
static void free_plugin(plugin *plugin_node){
270
271
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
272
free(*arg);
273
}
274
free(plugin_node->argv);
275
for(char **env = plugin_node->environ; *env != NULL; env++){
276
free(*env);
277
}
278
free(plugin_node->environ);
279
free(plugin_node->buffer);
280
281
/* Removes the plugin from the singly-linked list */
282
if(plugin_node == plugin_list){
283
/* First one - simple */
284
plugin_list = plugin_list->next;
285
} else {
286
/* Second one or later */
287
for(plugin *p = plugin_list; p != NULL; p = p->next){
288
if(p->next == plugin_node){
289
p->next = plugin_node->next;
290
break;
291
}
256
292
}
257
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
258
argv[1] = NULL;
259
}
260
*argc += 1;
261
argv = realloc(argv, sizeof(char *)
262
* ((unsigned int) *argc + 1));
263
if(argv == NULL){
264
return NULL;
265
}
266
argv[*argc-1] = arg;
267
argv[*argc] = NULL;
268
return argv;
293
}
294
295
free(plugin_node);
269
296
}
270
297
271
static void free_plugin_list(plugin *plugin_list){
272
for(plugin *next; plugin_list != NULL; plugin_list = next){
273
next = plugin_list->next;
274
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
275
free(*arg);
276
}
277
free(plugin_list->argv);
278
for(char **env = plugin_list->environ; *env != NULL; env++){
279
free(*env);
280
}
281
free(plugin_list->environ);
282
free(plugin_list);
298
static void free_plugin_list(void){
299
while(plugin_list != NULL){
300
free_plugin(plugin_list);
283
301
}
284
302
}
285
303
286
304
int main(int argc, char *argv[]){
287
const char *plugindir = "/lib/mandos/plugins.d";
288
const char *argfile = ARGFILE;
305
char *plugindir = NULL;
306
char *argfile = NULL;
289
307
FILE *conffp;
290
308
size_t d_name_len;
291
309
DIR *dir = NULL;
323
341
{ .name = "global-options", .key = 'g',
324
342
.arg = "OPTION[,OPTION[,...]]",
325
343
.doc = "Options passed to all plugins" },
326
{ .name = "global-envs", .key = 'e',
344
{ .name = "global-env", .key = 'G',
327
345
.arg = "VAR=value",
328
346
.doc = "Environment variable passed to all plugins" },
329
347
{ .name = "options-for", .key = 'o',
330
348
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
331
349
.doc = "Options passed only to specified plugin" },
332
{ .name = "envs-for", .key = 'f',
350
{ .name = "env-for", .key = 'E',
333
351
.arg = "PLUGIN:ENV=value",
334
352
.doc = "Environment variable passed to specified plugin" },
335
353
{ .name = "disable", .key = 'd',
336
354
.arg = "PLUGIN",
337
355
.doc = "Disable a specific plugin", .group = 1 },
356
{ .name = "enable", .key = 'e',
357
.arg = "PLUGIN",
358
.doc = "Enable a specific plugin", .group = 1 },
338
359
{ .name = "plugin-dir", .key = 128,
339
360
.arg = "DIRECTORY",
340
361
.doc = "Specify a different plugin directory", .group = 2 },
341
{ .name = "userid", .key = 129,
342
.arg = "ID", .flags = 0,
343
.doc = "User ID the plugins will run as", .group = 2 },
344
{ .name = "groupid", .key = 130,
345
.arg = "ID", .flags = 0,
346
.doc = "Group ID the plugins will run as", .group = 2 },
347
{ .name = "debug", .key = 131,
348
.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 },
349
373
{ .name = NULL }
350
374
};
351
375
352
error_t parse_opt (int key, char *arg, struct argp_state *state) {
353
/* Get the INPUT argument from `argp_parse', which we know is a
354
pointer to our plugin list pointer. */
355
plugin **plugins = state->input;
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
356
378
switch (key) {
357
case 'g':
379
case 'g': /* --global-options */
358
380
if (arg != NULL){
359
381
char *p;
360
382
while((p = strsep(&arg, ",")) != NULL){
361
383
if(p[0] == '\0'){
362
384
continue;
363
385
}
364
if(not add_argument(getplugin(NULL, plugins), p)){
386
if(not add_argument(getplugin(NULL), p)){
365
387
perror("add_argument");
366
388
return ARGP_ERR_UNKNOWN;
367
389
}
368
390
}
369
391
}
370
392
break;
371
case 'e':
393
case 'G': /* --global-env */
372
394
if(arg == NULL){
373
395
break;
374
396
}
375
{
376
char *envdef = strdup(arg);
377
if(envdef == NULL){
378
break;
379
}
380
if(not add_environment(getplugin(NULL, plugins), envdef)){
381
perror("add_environment");
382
}
397
if(not add_environment(getplugin(NULL), arg, true)){
398
perror("add_environment");
383
399
}
384
400
break;
385
case 'o':
401
case 'o': /* --options-for */
386
402
if (arg != NULL){
387
403
char *p_name = strsep(&arg, ":");
388
if(p_name[0] == '\0'){
404
if(p_name[0] == '\0' or arg == NULL){
389
405
break;
390
406
}
391
407
char *opt = strsep(&arg, ":");
392
if(opt[0] == '\0'){
408
if(opt[0] == '\0' or opt == NULL){
393
409
break;
394
410
}
395
if(opt != NULL){
396
char *p;
397
while((p = strsep(&opt, ",")) != NULL){
398
if(p[0] == '\0'){
399
continue;
400
}
401
if(not add_argument(getplugin(p_name, plugins), p)){
402
perror("add_argument");
403
return ARGP_ERR_UNKNOWN;
404
}
411
char *p;
412
while((p = strsep(&opt, ",")) != NULL){
413
if(p[0] == '\0'){
414
continue;
415
}
416
if(not add_argument(getplugin(p_name), p)){
417
perror("add_argument");
418
return ARGP_ERR_UNKNOWN;
405
419
}
406
420
}
407
421
}
408
422
break;
409
case 'f':
423
case 'E': /* --env-for */
410
424
if(arg == NULL){
411
425
break;
412
426
}
415
429
if(envdef == NULL){
416
430
break;
417
431
}
418
char *p_name = strndup(arg, (size_t) (envdef-arg));
419
if(p_name == NULL){
420
break;
421
}
422
envdef++;
423
if(not add_environment(getplugin(p_name, plugins), envdef)){
432
*envdef = '\0';
433
if(not add_environment(getplugin(arg), envdef+1, true)){
424
434
perror("add_environment");
425
435
}
426
436
}
427
437
break;
428
case 'd':
438
case 'd': /* --disable */
429
439
if (arg != NULL){
430
plugin *p = getplugin(arg, plugins);
440
plugin *p = getplugin(arg);
431
441
if(p == NULL){
432
442
return ARGP_ERR_UNKNOWN;
433
443
}
434
444
p->disabled = true;
435
445
}
436
446
break;
437
case 128:
438
plugindir = arg;
439
break;
440
case 129:
447
case 'e': /* --enable */
448
if (arg != NULL){
449
plugin *p = getplugin(arg);
450
if(p == NULL){
451
return ARGP_ERR_UNKNOWN;
452
}
453
p->disabled = false;
454
}
455
break;
456
case 128: /* --plugin-dir */
457
free(plugindir);
458
plugindir = strdup(arg);
459
if(plugindir == NULL){
460
perror("strdup");
461
}
462
break;
463
case 129: /* --config-file */
464
/* This is already done by parse_opt_config_file() */
465
break;
466
case 130: /* --userid */
441
467
uid = (uid_t)strtol(arg, NULL, 10);
442
468
break;
443
case 130:
469
case 131: /* --groupid */
444
470
gid = (gid_t)strtol(arg, NULL, 10);
445
471
break;
446
case 131:
472
case 132: /* --debug */
447
473
debug = true;
448
474
break;
449
475
case ARGP_KEY_ARG:
457
483
return 0;
458
484
}
459
485
460
plugin *plugin_list = NULL;
486
/* This option parser is the same as parse_opt() above, except it
487
ignores everything but the --config-file option. */
488
error_t parse_opt_config_file (int key, char *arg,
489
__attribute__((unused))
490
struct argp_state *state) {
491
switch (key) {
492
case 'g': /* --global-options */
493
case 'G': /* --global-env */
494
case 'o': /* --options-for */
495
case 'E': /* --env-for */
496
case 'd': /* --disable */
497
case 'e': /* --enable */
498
case 128: /* --plugin-dir */
499
break;
500
case 129: /* --config-file */
501
free(argfile);
502
argfile = strdup(arg);
503
if(argfile == NULL){
504
perror("strdup");
505
}
506
break;
507
case 130: /* --userid */
508
case 131: /* --groupid */
509
case 132: /* --debug */
510
case ARGP_KEY_ARG:
511
case ARGP_KEY_END:
512
break;
513
default:
514
return ARGP_ERR_UNKNOWN;
515
}
516
return 0;
517
}
461
518
462
struct argp argp = { .options = options, .parser = parse_opt,
463
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
519
struct argp argp = { .options = options,
520
.parser = parse_opt_config_file,
521
.args_doc = "",
464
522
.doc = "Mandos plugin runner -- Run plugins" };
465
523
466
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
524
/* Parse using the parse_opt_config_file in order to get the custom
525
config file location, if any. */
526
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
467
527
if (ret == ARGP_ERR_UNKNOWN){
468
528
fprintf(stderr, "Unknown error while parsing arguments\n");
469
529
exitstatus = EXIT_FAILURE;
470
530
goto fallback;
471
531
}
472
473
conffp = fopen(argfile, "r");
532
533
/* Reset to the normal argument parser */
534
argp.parser = parse_opt;
535
536
/* Open the configfile if available */
537
if (argfile == NULL){
538
conffp = fopen(AFILE, "r");
539
} else {
540
conffp = fopen(argfile, "r");
541
}
474
542
if(conffp != NULL){
475
543
char *org_line = NULL;
476
544
char *p, *arg, *new_arg, *line;
479
547
const char whitespace_delims[] = " \r\t\f\v\n";
480
548
const char comment_delim[] = "#";
481
549
550
custom_argc = 1;
551
custom_argv = malloc(sizeof(char*) * 2);
552
if(custom_argv == NULL){
553
perror("malloc");
554
exitstatus = EXIT_FAILURE;
555
goto fallback;
556
}
557
custom_argv[0] = argv[0];
558
custom_argv[1] = NULL;
559
560
/* for each line in the config file, strip whitespace and ignore
561
commented text */
482
562
while(true){
483
563
sret = getline(&org_line, &size, conffp);
484
564
if(sret == -1){
492
572
continue;
493
573
}
494
574
new_arg = strdup(p);
495
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
496
if (custom_argv == NULL){
497
perror("add_to_argv");
498
exitstatus = EXIT_FAILURE;
499
goto fallback;
500
}
575
if(new_arg == NULL){
576
perror("strdup");
577
exitstatus = EXIT_FAILURE;
578
free(org_line);
579
goto fallback;
580
}
581
582
custom_argc += 1;
583
custom_argv = realloc(custom_argv, sizeof(char *)
584
* ((unsigned int) custom_argc + 1));
585
if(custom_argv == NULL){
586
perror("realloc");
587
exitstatus = EXIT_FAILURE;
588
free(org_line);
589
goto fallback;
590
}
591
custom_argv[custom_argc-1] = new_arg;
592
custom_argv[custom_argc] = NULL;
501
593
}
502
594
}
503
595
free(org_line);
504
} else{
596
} else {
505
597
/* Check for harmful errors and go to fallback. Other errors might
506
598
not affect opening plugins */
507
599
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
510
602
goto fallback;
511
603
}
512
604
}
513
605
/* If there was any arguments from configuration file,
606
pass them to parser as command arguments */
514
607
if(custom_argv != NULL){
515
custom_argv[0] = argv[0];
516
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
608
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
609
0, NULL);
517
610
if (ret == ARGP_ERR_UNKNOWN){
518
611
fprintf(stderr, "Unknown error while parsing arguments\n");
519
612
exitstatus = EXIT_FAILURE;
521
614
}
522
615
}
523
616
617
/* Parse actual command line arguments, to let them override the
618
config file */
619
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
620
if (ret == ARGP_ERR_UNKNOWN){
621
fprintf(stderr, "Unknown error while parsing arguments\n");
622
exitstatus = EXIT_FAILURE;
623
goto fallback;
624
}
625
524
626
if(debug){
525
627
for(plugin *p = plugin_list; p != NULL; p=p->next){
526
628
fprintf(stderr, "Plugin: %s has %d arguments\n",
535
637
}
536
638
}
537
639
640
/* Strip permissions down to nobody */
538
641
ret = setuid(uid);
539
642
if (ret == -1){
540
643
perror("setuid");
541
}
542
644
}
543
645
setgid(gid);
544
646
if (ret == -1){
545
647
perror("setgid");
546
648
}
547
649
548
dir = opendir(plugindir);
650
if (plugindir == NULL){
651
dir = opendir(PDIR);
652
} else {
653
dir = opendir(plugindir);
654
}
655
549
656
if(dir == NULL){
550
657
perror("Could not open plugin dir");
551
658
exitstatus = EXIT_FAILURE;
567
674
568
675
FD_ZERO(&rfds_all);
569
676
677
/* Read and execute any executable in the plugin directory*/
570
678
while(true){
571
679
dirst = readdir(dir);
572
680
573
// All directory entries have been processed
681
/* All directory entries have been processed */
574
682
if(dirst == NULL){
575
683
if (errno == EBADF){
576
684
perror("readdir");
582
690
583
691
d_name_len = strlen(dirst->d_name);
584
692
585
// Ignore dotfiles, backup files and other junk
693
/* Ignore dotfiles, backup files and other junk */
586
694
{
587
695
bool bad_name = false;
588
696
603
711
break;
604
712
}
605
713
}
606
607
714
if(bad_name){
608
715
continue;
609
716
}
610
611
717
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
612
718
size_t suf_len = strlen(*suf);
613
719
if((d_name_len >= suf_len)
628
734
}
629
735
630
736
char *filename;
631
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
737
if(plugindir == NULL){
738
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
739
} else {
740
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
741
}
632
742
if(ret < 0){
633
743
perror("asprintf");
634
744
continue;
640
750
free(filename);
641
751
continue;
642
752
}
643
753
754
/* Ignore non-executable files */
644
755
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
645
756
if(debug){
646
757
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
649
760
free(filename);
650
761
continue;
651
762
}
652
plugin *p = getplugin(dirst->d_name, &plugin_list);
763
764
plugin *p = getplugin(dirst->d_name);
653
765
if(p == NULL){
654
766
perror("getplugin");
655
767
free(filename);
665
777
}
666
778
{
667
779
/* Add global arguments to argument list for this plugin */
668
plugin *g = getplugin(NULL, &plugin_list);
780
plugin *g = getplugin(NULL);
669
781
if(g != NULL){
670
782
for(char **a = g->argv + 1; *a != NULL; a++){
671
783
if(not add_argument(p, *a)){
674
786
}
675
787
/* Add global environment variables */
676
788
for(char **e = g->environ; *e != NULL; e++){
677
if(not add_environment(p, *e)){
789
if(not add_environment(p, *e, false)){
678
790
perror("add_environment");
679
791
}
680
792
}
685
797
process, too. */
686
798
if(p->environ[0] != NULL){
687
799
for(char **e = environ; *e != NULL; e++){
688
char *copy = strdup(*e);
689
if(copy == NULL){
690
perror("strdup");
691
continue;
692
}
693
if(not add_environment(p, copy)){
800
if(not add_environment(p, *e, false)){
694
801
perror("add_environment");
695
802
}
696
803
}
703
810
exitstatus = EXIT_FAILURE;
704
811
goto fallback;
705
812
}
813
/* Ask OS to automatic close the pipe on exec */
706
814
ret = set_cloexec_flag(pipefd[0]);
707
815
if(ret < 0){
708
816
perror("set_cloexec_flag");
722
830
exitstatus = EXIT_FAILURE;
723
831
goto fallback;
724
832
}
725
// Starting a new process to be watched
833
/* Starting a new process to be watched */
726
834
pid_t pid = fork();
727
835
if(pid == -1){
728
836
perror("fork");
766
874
}
767
875
/* no return */
768
876
}
769
/* parent process */
877
/* Parent process */
878
close(pipefd[1]); /* Close unused write end of pipe */
770
879
free(filename);
771
close(pipefd[1]); /* close unused write end of pipe */
772
process *new_process = malloc(sizeof(process));
773
if (new_process == NULL){
774
perror("malloc");
880
plugin *new_plugin = getplugin(dirst->d_name);
881
if (new_plugin == NULL){
882
perror("getplugin");
775
883
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
776
884
if(ret < 0){
777
perror("sigprocmask");
885
perror("sigprocmask");
778
886
}
779
887
exitstatus = EXIT_FAILURE;
780
888
goto fallback;
781
889
}
782
890
783
*new_process = (struct process){ .pid = pid,
784
.fd = pipefd[0],
785
.next = process_list };
786
// List handling
787
process_list = new_process;
891
new_plugin->pid = pid;
892
new_plugin->fd = pipefd[0];
893
788
894
/* Unblock SIGCHLD so signal handler can be run if this process
789
895
has already completed */
790
896
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
794
900
goto fallback;
795
901
}
796
902
797
FD_SET(new_process->fd, &rfds_all);
903
FD_SET(new_plugin->fd, &rfds_all);
798
904
799
if (maxfd < new_process->fd){
800
maxfd = new_process->fd;
905
if (maxfd < new_plugin->fd){
906
maxfd = new_plugin->fd;
801
907
}
802
908
803
909
}
804
910
805
free_plugin_list(plugin_list);
806
plugin_list = NULL;
807
808
911
closedir(dir);
809
912
dir = NULL;
810
811
if (process_list == NULL){
812
fprintf(stderr, "No plugin processes started. Incorrect plugin"
813
" directory?\n");
814
process_list = NULL;
913
914
for(plugin *p = plugin_list; p != NULL; p = p->next){
915
if(p->pid != 0){
916
break;
917
}
918
if(p->next == NULL){
919
fprintf(stderr, "No plugin processes started. Incorrect plugin"
920
" directory?\n");
921
free_plugin_list();
922
}
815
923
}
816
while(process_list){
924
925
/* Main loop while running plugins exist */
926
while(plugin_list){
817
927
fd_set rfds = rfds_all;
818
928
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
819
929
if (select_ret == -1){
823
933
}
824
934
/* OK, now either a process completed, or something can be read
825
935
from one of them */
826
for(process *proc = process_list; proc ; proc = proc->next){
936
for(plugin *proc = plugin_list; proc != NULL;){
827
937
/* Is this process completely done? */
828
938
if(proc->eof and proc->completed){
829
939
/* Only accept the plugin output if it exited cleanly */
830
940
if(not WIFEXITED(proc->status)
831
941
or WEXITSTATUS(proc->status) != 0){
832
942
/* Bad exit by plugin */
943
833
944
if(debug){
834
945
if(WIFEXITED(proc->status)){
835
946
fprintf(stderr, "Plugin %u exited with status %d\n",
844
955
(unsigned int) (proc->pid));
845
956
}
846
957
}
958
847
959
/* Remove the plugin */
848
960
FD_CLR(proc->fd, &rfds_all);
961
849
962
/* Block signal while modifying process_list */
850
963
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
851
964
if(ret < 0){
853
966
exitstatus = EXIT_FAILURE;
854
967
goto fallback;
855
968
}
856
/* Delete this process entry from the list */
857
if(process_list == proc){
858
/* First one - simple */
859
process_list = proc->next;
860
} else {
861
/* Second one or later */
862
for(process *p = process_list; p != NULL; p = p->next){
863
if(p->next == proc){
864
p->next = proc->next;
865
break;
866
}
867
}
868
}
969
869
970
/* We are done modifying process list, so unblock signal */
870
971
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
871
972
NULL);
872
973
if(ret < 0){
873
974
perror("sigprocmask");
874
}
875
free(proc->buffer);
876
free(proc);
877
/* We deleted this process from the list, so we can't go
878
proc->next. Therefore, start over from the beginning of
879
the process list */
880
break;
975
exitstatus = EXIT_FAILURE;
976
goto fallback;
977
}
978
979
if(plugin_list == NULL){
980
break;
981
}
982
983
plugin *next_plugin = proc->next;
984
free_plugin(proc);
985
proc = next_plugin;
986
continue;
881
987
}
988
882
989
/* This process exited nicely, so print its buffer */
883
990
884
991
bool bret = print_out_password(proc->buffer,
889
996
}
890
997
goto fallback;
891
998
}
999
892
1000
/* This process has not completed. Does it have any output? */
893
1001
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
894
1002
/* This process had nothing to say at this time */
1003
proc = proc->next;
895
1004
continue;
896
1005
}
897
1006
/* Before reading, make the process' data buffer large enough */
910
1019
BUFFER_SIZE);
911
1020
if(ret < 0){
912
1021
/* Read error from this process; ignore the error */
1022
proc = proc->next;
913
1023
continue;
914
1024
}
915
1025
if(ret == 0){
924
1034
925
1035
fallback:
926
1036
927
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1037
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
928
1038
/* Fallback if all plugins failed, none are found or an error
929
1039
occured */
930
1040
bool bret;
931
1041
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
932
1042
char *passwordbuffer = getpass("Password: ");
933
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1043
size_t len = strlen(passwordbuffer);
1044
/* Strip trailing newline */
1045
if(len > 0 and passwordbuffer[len-1] == '\n'){
1046
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1047
len--;
1048
}
1049
bret = print_out_password(passwordbuffer, len);
934
1050
if(not bret){
935
1051
perror("print_out_password");
936
1052
exitstatus = EXIT_FAILURE;
945
1061
}
946
1062
947
1063
if(custom_argv != NULL){
948
for(char **arg = custom_argv; *arg != NULL; arg++){
1064
for(char **arg = custom_argv+1; *arg != NULL; arg++){
949
1065
free(*arg);
950
1066
}
951
1067
free(custom_argv);
952
1068
}
953
free_plugin_list(plugin_list);
954
1069
955
1070
if(dir != NULL){
956
1071
closedir(dir);
957
1072
}
958
1073
959
1074
/* Free the process list and kill the processes */
960
for(process *next; process_list != NULL; process_list = next){
961
next = process_list->next;
962
close(process_list->fd);
963
ret = kill(process_list->pid, SIGTERM);
964
if(ret == -1 and errno != ESRCH){
965
/* set-uid proccesses migth not get closed */
966
perror("kill");
1075
for(plugin *p = plugin_list; p != NULL; p = p->next){
1076
if(p->pid != 0){
1077
close(p->fd);
1078
ret = kill(p->pid, SIGTERM);
1079
if(ret == -1 and errno != ESRCH){
1080
/* Set-uid proccesses might not get closed */
1081
perror("kill");
1082
}
967
1083
}
968
free(process_list->buffer);
969
free(process_list);
970
1084
}
971
1085
972
1086
/* Wait for any remaining child processes to terminate */
976
1090
if(errno != ECHILD){
977
1091
perror("wait");
978
1092
}
1093
1094
free_plugin_list();
1095
1096
free(plugindir);
1097
free(argfile);
979
1098
980
1099
return exitstatus;
981
1100
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0