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- Committer: Teddy Hogeborn
- Date: 2008-08-14 02:24:59 UTC
- Revision ID: teddy@fukt.bsnet.se-20080814022459-rq3jt4q409l3qbj3
* Makefile (PREFIX, CONFDIR): New.
* initramfs-tools-hook: Search for Mandos in /usr/local as well as in
/usr. Also copy plugin-runner. Also chmod
the config dir.
(DESTCONFDIR): Removed.
(MANDOSDIR): New.
(PLUGINDIR): Changed to "${MANDOSDIR}/plugins.d".
* initramfs-tools-script: New.
* mandos-client.c: Renamed to "plugin-runner.c". All references
changed.
(plugindir): Changed to "/lib/mandos/plugins.d".
* plugins.d/usplash: New.
* initramfs-tools-hook: Search for Mandos in /usr/local as well as in
/usr. Also copy plugin-runner. Also chmod
the config dir.
(DESTCONFDIR): Removed.
(MANDOSDIR): New.
(PLUGINDIR): Changed to "${MANDOSDIR}/plugins.d".
* initramfs-tools-script: New.
* mandos-client.c: Renamed to "plugin-runner.c". All references
changed.
(plugindir): Changed to "/lib/mandos/plugins.d".
* plugins.d/usplash: New.
- files added:
- network-protocol.txt
- files removed:
- COPYING
- files modified:
- Makefile
added
removed
plugin-runner.c
21
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
22
*/
23
23
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
26
26
#include <stddef.h> /* size_t, NULL */
27
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
28
EXIT_SUCCESS, realloc() */
51
51
close() */
52
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
53
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
54
#include <string.h> /* strtok, strlen(), strcpy(),
55
strcat() */
55
56
#include <errno.h> /* errno */
56
57
#include <argp.h> /* struct argp_option, struct
57
58
argp_state, struct argp,
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
68
69
69
const char *argp_program_version = "plugin-runner 1.0";
70
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
87
87
char *name; /* can be NULL or any plugin name */
88
88
char **argv;
89
89
int argc;
90
char **environ;
91
int envc;
92
90
bool disabled;
93
91
struct plugin *next;
94
92
} plugin;
103
101
/* Create a new plugin */
104
102
plugin *new_plugin = malloc(sizeof(plugin));
105
103
if (new_plugin == NULL){
106
return NULL;
107
}
108
char *copy_name = strdup(name);
109
if(copy_name == NULL){
110
return NULL;
111
}
112
113
*new_plugin = (plugin) { .name = copy_name,
114
.argc = 1,
115
.envc = 0,
116
.disabled = false,
117
.next = *plugin_list };
118
104
perror("malloc");
105
exit(EXIT_FAILURE);
106
}
107
new_plugin->name = name;
119
108
new_plugin->argv = malloc(sizeof(char *) * 2);
120
109
if (new_plugin->argv == NULL){
121
free(new_plugin);
122
return NULL;
110
perror("malloc");
111
exit(EXIT_FAILURE);
123
112
}
124
new_plugin->argv[0] = copy_name;
113
new_plugin->argv[0] = name;
125
114
new_plugin->argv[1] = NULL;
126
127
new_plugin->environ = malloc(sizeof(char *));
128
if(new_plugin->environ == NULL){
129
free(new_plugin->argv);
130
free(new_plugin);
131
return NULL;
132
}
133
new_plugin->environ[0] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
134
118
/* Append the new plugin to the list */
135
119
*plugin_list = new_plugin;
136
120
return new_plugin;
137
121
}
138
122
139
/* Helper function for add_argument and add_environment */
140
static bool add_to_char_array(const char *new, char ***array,
141
int *len){
142
/* Resize the pointed-to array to hold one more pointer */
143
*array = realloc(*array, sizeof(char *)
144
* (size_t) ((*len) + 2));
145
/* Malloc check */
146
if(*array == NULL){
147
return false;
148
}
149
/* Make a copy of the new string */
150
char *copy = strdup(new);
151
if(copy == NULL){
152
return false;
153
}
154
/* Insert the copy */
155
(*array)[*len] = copy;
156
(*len)++;
157
/* Add a new terminating NULL pointer to the last element */
158
(*array)[*len] = NULL;
159
return true;
160
}
161
162
/* Add to a plugin's argument vector */
163
static bool add_argument(plugin *p, const char *arg){
164
if(p == NULL){
165
return false;
166
}
167
return add_to_char_array(arg, &(p->argv), &(p->argc));
168
}
169
170
/* Add to a plugin's environment */
171
static bool add_environment(plugin *p, const char *def){
172
if(p == NULL){
173
return false;
174
}
175
return add_to_char_array(def, &(p->environ), &(p->envc));
176
}
177
123
static void addargument(plugin *p, char *arg){
124
p->argv[p->argc] = arg;
125
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
if (p->argv == NULL){
127
perror("malloc");
128
exit(EXIT_FAILURE);
129
}
130
p->argc++;
131
p->argv[p->argc] = NULL;
132
}
178
133
179
134
/*
180
135
* Based on the example in the GNU LibC manual chapter 13.13 "File
230
185
return true;
231
186
}
232
187
233
char **add_to_argv(char **argv, int *argc, char *arg){
234
if (argv == NULL){
235
*argc = 1;
236
argv = malloc(sizeof(char*) * 2);
237
if(argv == NULL){
238
return NULL;
239
}
240
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
241
argv[1] = NULL;
242
}
243
*argc += 1;
244
argv = realloc(argv, sizeof(char *)
245
* ((unsigned int) *argc + 1));
246
if(argv == NULL){
247
return NULL;
248
}
249
argv[*argc-1] = arg;
250
argv[*argc] = NULL;
251
return argv;
252
}
253
254
static void free_plugin_list(plugin *plugin_list){
255
for(plugin *next = plugin_list; plugin_list != NULL; plugin_list = next){
256
next = plugin_list->next;
257
free(plugin_list->name);
258
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
259
free(*arg);
260
}
261
free(plugin_list->argv);
262
for(char **env = plugin_list->environ; *env != NULL; env++){
263
free(*env);
264
}
265
free(plugin_list->environ);
266
free(plugin_list);
267
}
268
}
269
270
188
int main(int argc, char *argv[]){
271
189
const char *plugindir = "/lib/mandos/plugins.d";
272
const char *argfile = ARGFILE;
273
FILE *conffp;
274
190
size_t d_name_len;
275
191
DIR *dir = NULL;
276
192
struct dirent *dirst;
284
200
struct sigaction old_sigchld_action;
285
201
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
286
202
.sa_flags = SA_NOCLDSTOP };
287
char **custom_argv = NULL;
288
int custom_argc = 0;
289
203
char *plus_options = NULL;
204
char **plus_argv = NULL;
205
290
206
/* Establish a signal handler */
291
207
sigemptyset(&sigchld_action.sa_mask);
292
208
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
293
if(ret == -1){
209
if(ret < 0){
294
210
perror("sigaddset");
295
exitstatus = EXIT_FAILURE;
296
goto fallback;
211
exit(EXIT_FAILURE);
297
212
}
298
213
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
299
if(ret == -1){
214
if(ret < 0){
300
215
perror("sigaction");
301
exitstatus = EXIT_FAILURE;
302
goto fallback;
216
exit(EXIT_FAILURE);
303
217
}
304
218
305
219
/* The options we understand. */
307
221
{ .name = "global-options", .key = 'g',
308
222
.arg = "OPTION[,OPTION[,...]]",
309
223
.doc = "Options passed to all plugins" },
310
{ .name = "global-envs", .key = 'e',
311
.arg = "VAR=value",
312
.doc = "Environment variable passed to all plugins" },
313
224
{ .name = "options-for", .key = 'o',
314
225
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
315
226
.doc = "Options passed only to specified plugin" },
316
{ .name = "envs-for", .key = 'f',
317
.arg = "PLUGIN:ENV=value",
318
.doc = "Environment variable passed to specified plugin" },
319
227
{ .name = "disable", .key = 'd',
320
228
.arg = "PLUGIN",
321
229
.doc = "Disable a specific plugin", .group = 1 },
340
248
switch (key) {
341
249
case 'g':
342
250
if (arg != NULL){
343
char *p;
344
while((p = strsep(&arg, ",")) != NULL){
345
if(p[0] == '\0'){
346
continue;
347
}
348
if(not add_argument(getplugin(NULL, plugins), p)){
349
perror("add_argument");
350
return ARGP_ERR_UNKNOWN;
351
}
352
}
353
}
354
break;
355
case 'e':
356
if(arg == NULL){
357
break;
358
}
359
{
360
char *envdef = strdup(arg);
361
if(envdef == NULL){
362
break;
363
}
364
if(not add_environment(getplugin(NULL, plugins), envdef)){
365
perror("add_environment");
366
}
251
char *p = strtok(arg, ",");
252
do{
253
addargument(getplugin(NULL, plugins), p);
254
p = strtok(NULL, ",");
255
} while (p != NULL);
367
256
}
368
257
break;
369
258
case 'o':
370
259
if (arg != NULL){
371
char *p_name = strsep(&arg, ":");
372
if(p_name[0] == '\0'){
373
break;
374
}
375
char *opt = strsep(&arg, ":");
376
if(opt[0] == '\0'){
377
break;
378
}
379
if(opt != NULL){
380
char *p;
381
while((p = strsep(&opt, ",")) != NULL){
382
if(p[0] == '\0'){
383
continue;
384
}
385
if(not add_argument(getplugin(p_name, plugins), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
388
}
389
}
390
}
391
}
392
break;
393
case 'f':
394
if(arg == NULL){
395
break;
396
}
397
{
398
char *envdef = strchr(arg, ':');
399
if(envdef == NULL){
400
break;
401
}
402
char *p_name = strndup(arg, (size_t) (envdef-arg));
403
if(p_name == NULL){
404
break;
405
}
406
envdef++;
407
if(not add_environment(getplugin(p_name, plugins), envdef)){
408
perror("add_environment");
260
char *name = strtok(arg, ":");
261
char *p = strtok(NULL, ":");
262
if(p != NULL){
263
p = strtok(p, ",");
264
do{
265
addargument(getplugin(name, plugins), p);
266
p = strtok(NULL, ",");
267
} while (p != NULL);
409
268
}
410
269
}
411
270
break;
412
271
case 'd':
413
272
if (arg != NULL){
414
plugin *p = getplugin(arg, plugins);
415
if(p == NULL){
416
return ARGP_ERR_UNKNOWN;
417
}
418
p->disabled = true;
273
getplugin(arg, plugins)->disabled = true;
419
274
}
420
275
break;
421
276
case 128:
431
286
debug = true;
432
287
break;
433
288
case ARGP_KEY_ARG:
434
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
289
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
290
argp_usage (state);
291
}
292
plus_options = arg;
435
293
break;
436
294
case ARGP_KEY_END:
437
295
break;
451
309
if (ret == ARGP_ERR_UNKNOWN){
452
310
fprintf(stderr, "Unknown error while parsing arguments\n");
453
311
exitstatus = EXIT_FAILURE;
454
goto fallback;
312
goto end;
455
313
}
456
457
conffp = fopen(argfile, "r");
458
if(conffp != NULL){
459
char *org_line = NULL;
460
char *p, *arg, *new_arg, *line;
461
size_t size = 0;
462
ssize_t sret;
463
const char whitespace_delims[] = " \r\t\f\v\n";
464
const char comment_delim[] = "#";
465
466
while(true){
467
sret = getline(&org_line, &size, conffp);
468
if(sret == -1){
469
break;
470
}
471
472
line = org_line;
473
arg = strsep(&line, comment_delim);
474
while((p = strsep(&arg, whitespace_delims)) != NULL){
475
if(p[0] == '\0'){
476
continue;
477
}
478
new_arg = strdup(p);
479
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
480
if (custom_argv == NULL){
481
perror("add_to_argv");
482
exitstatus = EXIT_FAILURE;
483
goto fallback;
484
}
485
}
486
}
487
free(org_line);
488
} else{
489
/* Check for harmful errors and go to fallback. Other errors might
490
not affect opening plugins */
491
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
492
perror("fopen");
314
315
if(plus_options){
316
/* This is a mangled argument in the form of
317
"+--option+--other-option=parameter+--yet-another-option", etc */
318
/* Make new argc and argv vars, and call argp_parse() again. */
319
plus_options++; /* skip the first '+' character */
320
const char delims[] = "+";
321
char *arg;
322
int new_argc = 1;
323
plus_argv = malloc(sizeof(char*) * 2);
324
if(plus_argv == NULL){
325
perror("malloc");
493
326
exitstatus = EXIT_FAILURE;
494
goto fallback;
495
}
496
}
497
498
if(custom_argv != NULL){
499
custom_argv[0] = argv[0];
500
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
327
goto end;
328
}
329
plus_argv[0] = argv[0];
330
plus_argv[1] = NULL;
331
arg = strtok(plus_options, delims); /* Get first argument */
332
while(arg != NULL){
333
new_argc++;
334
plus_argv = realloc(plus_argv, sizeof(char *)
335
* ((unsigned int) new_argc + 1));
336
if(plus_argv == NULL){
337
perror("realloc");
338
exitstatus = EXIT_FAILURE;
339
goto end;
340
}
341
plus_argv[new_argc-1] = arg;
342
plus_argv[new_argc] = NULL;
343
arg = strtok(NULL, delims); /* Get next argument */
344
}
345
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
501
346
if (ret == ARGP_ERR_UNKNOWN){
502
347
fprintf(stderr, "Unknown error while parsing arguments\n");
503
348
exitstatus = EXIT_FAILURE;
504
goto fallback;
349
goto end;
505
350
}
506
351
}
507
352
512
357
for(char **a = p->argv; *a != NULL; a++){
513
358
fprintf(stderr, "\tArg: %s\n", *a);
514
359
}
515
fprintf(stderr, "...and %u environment variables\n", p->envc);
516
for(char **a = p->environ; *a != NULL; a++){
517
fprintf(stderr, "\t%s\n", *a);
518
}
519
360
}
520
361
}
521
362
533
374
if(dir == NULL){
534
375
perror("Could not open plugin dir");
535
376
exitstatus = EXIT_FAILURE;
536
goto fallback;
377
goto end;
537
378
}
538
379
539
380
/* Set the FD_CLOEXEC flag on the directory, if possible */
544
385
if(ret < 0){
545
386
perror("set_cloexec_flag");
546
387
exitstatus = EXIT_FAILURE;
547
goto fallback;
388
goto end;
548
389
}
549
390
}
550
391
}
559
400
if (errno == EBADF){
560
401
perror("readdir");
561
402
exitstatus = EXIT_FAILURE;
562
goto fallback;
403
goto end;
563
404
}
564
405
break;
565
406
}
610
451
continue;
611
452
}
612
453
}
613
614
char *filename;
615
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
616
if(ret < 0){
617
perror("asprintf");
454
455
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
456
if (filename == NULL){
457
perror("malloc");
618
458
continue;
619
459
}
460
strcpy(filename, plugindir); /* Spurious warning */
461
strcat(filename, "/"); /* Spurious warning */
462
strcat(filename, dirst->d_name); /* Spurious warning */
620
463
621
464
ret = stat(filename, &st);
622
465
if (ret == -1){
633
476
free(filename);
634
477
continue;
635
478
}
636
plugin *p = getplugin(dirst->d_name, &plugin_list);
637
if(p == NULL){
638
perror("getplugin");
639
free(filename);
640
continue;
641
}
642
if(p->disabled){
479
if(getplugin(dirst->d_name, &plugin_list)->disabled){
643
480
if(debug){
644
481
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
645
482
dirst->d_name);
647
484
free(filename);
648
485
continue;
649
486
}
487
plugin *p = getplugin(dirst->d_name, &plugin_list);
650
488
{
651
489
/* Add global arguments to argument list for this plugin */
652
490
plugin *g = getplugin(NULL, &plugin_list);
653
if(g != NULL){
654
for(char **a = g->argv + 1; *a != NULL; a++){
655
if(not add_argument(p, *a)){
656
perror("add_argument");
657
}
658
}
659
/* Add global environment variables */
660
for(char **e = g->environ; *e != NULL; e++){
661
if(not add_environment(p, *e)){
662
perror("add_environment");
663
}
664
}
665
}
666
}
667
/* If this plugin has any environment variables, we will call
668
using execve and need to duplicate the environment from this
669
process, too. */
670
if(p->environ[0] != NULL){
671
for(char **e = environ; *e != NULL; e++){
672
char *copy = strdup(*e);
673
if(copy == NULL){
674
perror("strdup");
675
continue;
676
}
677
if(not add_environment(p, copy)){
678
perror("add_environment");
679
}
680
}
681
}
682
491
for(char **a = g->argv + 1; *a != NULL; a++){
492
addargument(p, *a);
493
}
494
}
683
495
int pipefd[2];
684
496
ret = pipe(pipefd);
685
497
if (ret == -1){
686
498
perror("pipe");
687
499
exitstatus = EXIT_FAILURE;
688
goto fallback;
500
goto end;
689
501
}
690
502
ret = set_cloexec_flag(pipefd[0]);
691
503
if(ret < 0){
692
504
perror("set_cloexec_flag");
693
505
exitstatus = EXIT_FAILURE;
694
goto fallback;
506
goto end;
695
507
}
696
508
ret = set_cloexec_flag(pipefd[1]);
697
509
if(ret < 0){
698
510
perror("set_cloexec_flag");
699
511
exitstatus = EXIT_FAILURE;
700
goto fallback;
512
goto end;
701
513
}
702
514
/* Block SIGCHLD until process is safely in process list */
703
515
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
704
516
if(ret < 0){
705
517
perror("sigprocmask");
706
518
exitstatus = EXIT_FAILURE;
707
goto fallback;
519
goto end;
708
520
}
709
521
// Starting a new process to be watched
710
522
pid_t pid = fork();
711
523
if(pid == -1){
712
524
perror("fork");
713
525
exitstatus = EXIT_FAILURE;
714
goto fallback;
526
goto end;
715
527
}
716
528
if(pid == 0){
717
529
/* this is the child process */
737
549
above and must now close it manually here. */
738
550
closedir(dir);
739
551
}
740
if(p->environ[0] == NULL){
741
if(execv(filename, p->argv) < 0){
742
perror("execv");
743
_exit(EXIT_FAILURE);
744
}
745
} else {
746
if(execve(filename, p->argv, p->environ) < 0){
747
perror("execve");
748
_exit(EXIT_FAILURE);
749
}
552
if(execv(filename, p->argv) < 0){
553
perror("execv");
554
_exit(EXIT_FAILURE);
750
555
}
751
556
/* no return */
752
557
}
761
566
perror("sigprocmask");
762
567
}
763
568
exitstatus = EXIT_FAILURE;
764
goto fallback;
569
goto end;
765
570
}
766
571
767
572
*new_process = (struct process){ .pid = pid,
775
580
if(ret < 0){
776
581
perror("sigprocmask");
777
582
exitstatus = EXIT_FAILURE;
778
goto fallback;
583
goto end;
779
584
}
780
585
781
586
FD_SET(new_process->fd, &rfds_all);
786
591
787
592
}
788
593
789
free_plugin_list(plugin_list);
594
/* Free the plugin list */
595
for(plugin *next; plugin_list != NULL; plugin_list = next){
596
next = plugin_list->next;
597
free(plugin_list->argv);
598
free(plugin_list);
599
}
790
600
791
601
closedir(dir);
792
602
dir = NULL;
802
612
if (select_ret == -1){
803
613
perror("select");
804
614
exitstatus = EXIT_FAILURE;
805
goto fallback;
615
goto end;
806
616
}
807
617
/* OK, now either a process completed, or something can be read
808
618
from one of them */
834
644
if(ret < 0){
835
645
perror("sigprocmask");
836
646
exitstatus = EXIT_FAILURE;
837
goto fallback;
647
goto end;
838
648
}
839
649
/* Delete this process entry from the list */
840
650
if(process_list == proc){
869
679
perror("print_out_password");
870
680
exitstatus = EXIT_FAILURE;
871
681
}
872
goto fallback;
682
goto end;
873
683
}
874
684
/* This process has not completed. Does it have any output? */
875
685
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
883
693
if (proc->buffer == NULL){
884
694
perror("malloc");
885
695
exitstatus = EXIT_FAILURE;
886
goto fallback;
696
goto end;
887
697
}
888
698
proc->buffer_size += BUFFER_SIZE;
889
699
}
904
714
}
905
715
906
716
907
fallback:
717
end:
908
718
909
719
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
910
720
/* Fallback if all plugins failed, none are found or an error occured */
915
725
if(not bret){
916
726
perror("print_out_password");
917
727
exitstatus = EXIT_FAILURE;
728
goto end;
918
729
}
919
730
}
920
731
921
732
/* Restore old signal handler */
922
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
923
if(ret == -1){
924
perror("sigaction");
925
exitstatus = EXIT_FAILURE;
926
}
927
928
if(custom_argv != NULL){
929
for(char **arg = custom_argv; *arg != NULL; arg++){
930
free(*arg);
931
}
932
free(custom_argv);
933
}
934
free_plugin_list(plugin_list);
733
sigaction(SIGCHLD, &old_sigchld_action, NULL);
734
735
free(plus_argv);
736
737
/* Free the plugin list */
738
for(plugin *next; plugin_list != NULL; plugin_list = next){
739
next = plugin_list->next;
740
free(plugin_list->argv);
741
free(plugin_list);
742
}
935
743
936
744
if(dir != NULL){
937
745
closedir(dir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0