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- Committer: Teddy Hogeborn
- Date: 2008-08-25 07:52:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20080825075235-gq338t4ywhqhire8
* mandos-clients.conf.xml (DESCRIPTION): Do not imply that this is the
only configuration file of
mandos(8).
(OPTIONS): Note that unknown options are ignored. When describing
"checker", be more specific about exit codes, and refer
to PATH. When describing "secret", refer to
mandos-keygen(8), and note the relationship with
"secfile". Added synopsis to "secfile", and note
relationship with "secret". Added synopsis and more text
to "host".
(EXAMPLE): Remove Radix-64 checksum from "secret" option value.
(SEE ALSO): New section, refer to mandos(8), mandos-keygen(8), and
mandos.conf(5).
only configuration file of
mandos(8).
(OPTIONS): Note that unknown options are ignored. When describing
"checker", be more specific about exit codes, and refer
to PATH. When describing "secret", refer to
mandos-keygen(8), and note the relationship with
"secfile". Added synopsis to "secfile", and note
relationship with "secret". Added synopsis and more text
to "host".
(EXAMPLE): Remove Radix-64 checksum from "secret" option value.
(SEE ALSO): New section, refer to mandos(8), mandos-keygen(8), and
mandos.conf(5).
- files removed:
- .bzr-builddeb
- debian
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.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
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
69
72
70
const char *argp_program_version = "plugin-runner 1.0";
73
71
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
72
75
struct plugin;
76
77
typedef struct plugin{
78
char *name; /* can be NULL or any plugin name */
79
char **argv;
80
int argc;
81
char **environ;
82
int envc;
83
bool disabled;
84
85
/* Variables used for running processes*/
73
struct process;
74
75
typedef struct process{
86
76
pid_t pid;
87
77
int fd;
88
78
char *buffer;
91
81
bool eof;
92
82
volatile bool completed;
93
83
volatile int status;
84
struct process *next;
85
} process;
86
87
typedef struct plugin{
88
char *name; /* can be NULL or any plugin name */
89
char **argv;
90
int argc;
91
char **environ;
92
int envc;
93
bool disabled;
94
94
struct plugin *next;
95
95
} plugin;
96
96
97
static plugin *plugin_list = NULL;
98
99
/* Gets 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){
97
static plugin *getplugin(char *name, plugin **plugin_list){
98
for (plugin *p = *plugin_list; p != NULL; p = p->next){
104
99
if ((p->name == name)
105
100
or (p->name and name and (strcmp(p->name, name) == 0))){
106
101
return p;
121
116
122
117
*new_plugin = (plugin) { .name = copy_name,
123
118
.argc = 1,
119
.envc = 0,
124
120
.disabled = false,
125
.next = plugin_list };
121
.next = *plugin_list };
126
122
127
123
new_plugin->argv = malloc(sizeof(char *) * 2);
128
124
if (new_plugin->argv == NULL){
132
128
}
133
129
new_plugin->argv[0] = copy_name;
134
130
new_plugin->argv[1] = NULL;
135
131
136
132
new_plugin->environ = malloc(sizeof(char *));
137
133
if(new_plugin->environ == NULL){
138
134
free(copy_name);
141
137
return NULL;
142
138
}
143
139
new_plugin->environ[0] = NULL;
144
145
140
/* Append the new plugin to the list */
146
plugin_list = new_plugin;
141
*plugin_list = new_plugin;
147
142
return new_plugin;
148
143
}
149
144
179
174
}
180
175
181
176
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def, bool replace){
177
static bool add_environment(plugin *p, const char *def){
183
178
if(p == NULL){
184
179
return false;
185
180
}
186
/* namelen = length of name of environment variable */
187
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
/* Search for this environment variable */
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen + 1) == 0){
191
/* It already exists */
192
if(replace){
193
char *new = realloc(*e, strlen(def) + 1);
194
if(new == NULL){
195
return false;
196
}
197
*e = new;
198
strcpy(*e, def);
199
}
200
return true;
201
}
202
}
203
181
return add_to_char_array(def, &(p->environ), &(p->envc));
204
182
}
205
183
184
206
185
/*
207
186
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
187
* Descriptor Flags".
219
198
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
220
199
}
221
200
201
process *process_list = NULL;
222
202
223
203
/* Mark processes as completed when they exit, and save their exit
224
204
status. */
225
205
void handle_sigchld(__attribute__((unused)) int sig){
226
206
while(true){
227
plugin *proc = plugin_list;
207
process *proc = process_list;
228
208
int status;
229
209
pid_t pid = waitpid(-1, &status, WNOHANG);
230
210
if(pid == 0){
238
218
/* No child processes */
239
219
break;
240
220
}
241
221
242
222
/* A child exited, find it in process_list */
243
223
while(proc != NULL and proc->pid != pid){
244
224
proc = proc->next;
252
232
}
253
233
}
254
234
255
/* Prints out a password to stdout */
256
235
bool print_out_password(const char *buffer, size_t length){
257
236
ssize_t ret;
237
if(length>0 and buffer[length-1] == '\n'){
238
length--;
239
}
258
240
for(size_t written = 0; written < length; written += (size_t)ret){
259
241
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
260
242
length - written));
265
247
return true;
266
248
}
267
249
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
}
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;
292
256
}
293
}
294
295
free(plugin_node);
257
argv[0] = NULL; /* Will be set to argv[0] in main before
258
parsing */
259
argv[1] = NULL;
260
}
261
*argc += 1;
262
argv = realloc(argv, sizeof(char *)
263
* ((unsigned int) *argc + 1));
264
if(argv == NULL){
265
return NULL;
266
}
267
argv[*argc-1] = arg;
268
argv[*argc] = NULL;
269
return argv;
296
270
}
297
271
298
static void free_plugin_list(void){
299
while(plugin_list != NULL){
300
free_plugin(plugin_list);
272
static void free_plugin_list(plugin *plugin_list){
273
for(plugin *next; plugin_list != NULL; plugin_list = next){
274
next = plugin_list->next;
275
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
276
free(*arg);
277
}
278
free(plugin_list->argv);
279
for(char **env = plugin_list->environ; *env != NULL; env++){
280
free(*env);
281
}
282
free(plugin_list->environ);
283
free(plugin_list);
301
284
}
302
285
}
303
286
304
287
int main(int argc, char *argv[]){
305
char *plugindir = NULL;
306
char *argfile = NULL;
288
const char *plugindir = "/lib/mandos/plugins.d";
289
const char *argfile = ARGFILE;
307
290
FILE *conffp;
308
291
size_t d_name_len;
309
292
DIR *dir = NULL;
341
324
{ .name = "global-options", .key = 'g',
342
325
.arg = "OPTION[,OPTION[,...]]",
343
326
.doc = "Options passed to all plugins" },
344
{ .name = "global-env", .key = 'G',
327
{ .name = "global-envs", .key = 'e',
345
328
.arg = "VAR=value",
346
329
.doc = "Environment variable passed to all plugins" },
347
330
{ .name = "options-for", .key = 'o',
348
331
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
349
332
.doc = "Options passed only to specified plugin" },
350
{ .name = "env-for", .key = 'E',
333
{ .name = "envs-for", .key = 'f',
351
334
.arg = "PLUGIN:ENV=value",
352
335
.doc = "Environment variable passed to specified plugin" },
353
336
{ .name = "disable", .key = 'd',
354
337
.arg = "PLUGIN",
355
338
.doc = "Disable a specific plugin", .group = 1 },
356
{ .name = "enable", .key = 'e',
357
.arg = "PLUGIN",
358
.doc = "Enable a specific plugin", .group = 1 },
359
339
{ .name = "plugin-dir", .key = 128,
360
340
.arg = "DIRECTORY",
361
341
.doc = "Specify a different plugin directory", .group = 2 },
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 },
342
{ .name = "userid", .key = 129,
343
.arg = "ID", .flags = 0,
344
.doc = "User ID the plugins will run as", .group = 2 },
345
{ .name = "groupid", .key = 130,
346
.arg = "ID", .flags = 0,
347
.doc = "Group ID the plugins will run as", .group = 2 },
348
{ .name = "debug", .key = 131,
349
.doc = "Debug mode", .group = 3 },
373
350
{ .name = NULL }
374
351
};
375
352
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
353
error_t parse_opt (int key, char *arg, struct argp_state *state) {
354
/* Get the INPUT argument from `argp_parse', which we know is a
355
pointer to our plugin list pointer. */
356
plugin **plugins = state->input;
378
357
switch (key) {
379
case 'g': /* --global-options */
358
case 'g':
380
359
if (arg != NULL){
381
360
char *p;
382
361
while((p = strsep(&arg, ",")) != NULL){
383
362
if(p[0] == '\0'){
384
363
continue;
385
364
}
386
if(not add_argument(getplugin(NULL), p)){
365
if(not add_argument(getplugin(NULL, plugins), p)){
387
366
perror("add_argument");
388
367
return ARGP_ERR_UNKNOWN;
389
368
}
390
369
}
391
370
}
392
371
break;
393
case 'G': /* --global-env */
372
case 'e':
394
373
if(arg == NULL){
395
374
break;
396
375
}
397
if(not add_environment(getplugin(NULL), arg, true)){
398
perror("add_environment");
376
{
377
char *envdef = strdup(arg);
378
if(envdef == NULL){
379
break;
380
}
381
if(not add_environment(getplugin(NULL, plugins), envdef)){
382
perror("add_environment");
383
}
399
384
}
400
385
break;
401
case 'o': /* --options-for */
386
case 'o':
402
387
if (arg != NULL){
403
388
char *p_name = strsep(&arg, ":");
404
if(p_name[0] == '\0' or arg == NULL){
389
if(p_name[0] == '\0'){
405
390
break;
406
391
}
407
392
char *opt = strsep(&arg, ":");
408
if(opt[0] == '\0' or opt == NULL){
393
if(opt[0] == '\0'){
409
394
break;
410
395
}
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;
396
if(opt != NULL){
397
char *p;
398
while((p = strsep(&opt, ",")) != NULL){
399
if(p[0] == '\0'){
400
continue;
401
}
402
if(not add_argument(getplugin(p_name, plugins), p)){
403
perror("add_argument");
404
return ARGP_ERR_UNKNOWN;
405
}
419
406
}
420
407
}
421
408
}
422
409
break;
423
case 'E': /* --env-for */
410
case 'f':
424
411
if(arg == NULL){
425
412
break;
426
413
}
429
416
if(envdef == NULL){
430
417
break;
431
418
}
432
*envdef = '\0';
433
if(not add_environment(getplugin(arg), envdef+1, true)){
419
char *p_name = strndup(arg, (size_t) (envdef-arg));
420
if(p_name == NULL){
421
break;
422
}
423
envdef++;
424
if(not add_environment(getplugin(p_name, plugins), envdef)){
434
425
perror("add_environment");
435
426
}
436
427
}
437
428
break;
438
case 'd': /* --disable */
429
case 'd':
439
430
if (arg != NULL){
440
plugin *p = getplugin(arg);
431
plugin *p = getplugin(arg, plugins);
441
432
if(p == NULL){
442
433
return ARGP_ERR_UNKNOWN;
443
434
}
444
435
p->disabled = true;
445
436
}
446
437
break;
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 */
438
case 128:
439
plugindir = arg;
440
break;
441
case 129:
467
442
uid = (uid_t)strtol(arg, NULL, 10);
468
443
break;
469
case 131: /* --groupid */
444
case 130:
470
445
gid = (gid_t)strtol(arg, NULL, 10);
471
446
break;
472
case 132: /* --debug */
447
case 131:
473
448
debug = true;
474
449
break;
475
450
case ARGP_KEY_ARG:
476
/* Cryptsetup always passes an argument, which is an empty
477
string if "none" was specified in /etc/crypttab. So if
478
argument was empty, we ignore it silently. */
479
if(arg[0] != '\0'){
480
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
481
}
482
break;
483
case ARGP_KEY_END:
484
break;
485
default:
486
return ARGP_ERR_UNKNOWN;
487
}
488
return 0;
489
}
490
491
/* This option parser is the same as parse_opt() above, except it
492
ignores everything but the --config-file option. */
493
error_t parse_opt_config_file (int key, char *arg,
494
__attribute__((unused))
495
struct argp_state *state) {
496
switch (key) {
497
case 'g': /* --global-options */
498
case 'G': /* --global-env */
499
case 'o': /* --options-for */
500
case 'E': /* --env-for */
501
case 'd': /* --disable */
502
case 'e': /* --enable */
503
case 128: /* --plugin-dir */
504
break;
505
case 129: /* --config-file */
506
free(argfile);
507
argfile = strdup(arg);
508
if(argfile == NULL){
509
perror("strdup");
510
}
511
break;
512
case 130: /* --userid */
513
case 131: /* --groupid */
514
case 132: /* --debug */
515
case ARGP_KEY_ARG:
516
case ARGP_KEY_END:
517
break;
518
default:
519
return ARGP_ERR_UNKNOWN;
520
}
521
return 0;
522
}
523
524
struct argp argp = { .options = options,
525
.parser = parse_opt_config_file,
526
.args_doc = "",
451
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
452
break;
453
case ARGP_KEY_END:
454
break;
455
default:
456
return ARGP_ERR_UNKNOWN;
457
}
458
return 0;
459
}
460
461
plugin *plugin_list = NULL;
462
463
struct argp argp = { .options = options, .parser = parse_opt,
464
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
527
465
.doc = "Mandos plugin runner -- Run plugins" };
528
466
529
/* Parse using the parse_opt_config_file in order to get the custom
530
config file location, if any. */
531
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
467
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
532
468
if (ret == ARGP_ERR_UNKNOWN){
533
469
fprintf(stderr, "Unknown error while parsing arguments\n");
534
470
exitstatus = EXIT_FAILURE;
535
471
goto fallback;
536
472
}
537
538
/* Reset to the normal argument parser */
539
argp.parser = parse_opt;
540
541
/* Open the configfile if available */
542
if (argfile == NULL){
543
conffp = fopen(AFILE, "r");
544
} else {
545
conffp = fopen(argfile, "r");
546
}
473
474
conffp = fopen(argfile, "r");
547
475
if(conffp != NULL){
548
476
char *org_line = NULL;
549
477
char *p, *arg, *new_arg, *line;
552
480
const char whitespace_delims[] = " \r\t\f\v\n";
553
481
const char comment_delim[] = "#";
554
482
555
custom_argc = 1;
556
custom_argv = malloc(sizeof(char*) * 2);
557
if(custom_argv == NULL){
558
perror("malloc");
559
exitstatus = EXIT_FAILURE;
560
goto fallback;
561
}
562
custom_argv[0] = argv[0];
563
custom_argv[1] = NULL;
564
565
/* for each line in the config file, strip whitespace and ignore
566
commented text */
567
483
while(true){
568
484
sret = getline(&org_line, &size, conffp);
569
485
if(sret == -1){
577
493
continue;
578
494
}
579
495
new_arg = strdup(p);
580
if(new_arg == NULL){
581
perror("strdup");
582
exitstatus = EXIT_FAILURE;
583
free(org_line);
584
goto fallback;
585
}
586
587
custom_argc += 1;
588
custom_argv = realloc(custom_argv, sizeof(char *)
589
* ((unsigned int) custom_argc + 1));
590
if(custom_argv == NULL){
591
perror("realloc");
592
exitstatus = EXIT_FAILURE;
593
free(org_line);
594
goto fallback;
595
}
596
custom_argv[custom_argc-1] = new_arg;
597
custom_argv[custom_argc] = NULL;
496
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
497
if (custom_argv == NULL){
498
perror("add_to_argv");
499
exitstatus = EXIT_FAILURE;
500
goto fallback;
501
}
598
502
}
599
503
}
600
504
free(org_line);
601
} else {
505
} else{
602
506
/* Check for harmful errors and go to fallback. Other errors might
603
507
not affect opening plugins */
604
508
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
607
511
goto fallback;
608
512
}
609
513
}
610
/* If there was any arguments from configuration file,
611
pass them to parser as command arguments */
514
612
515
if(custom_argv != NULL){
613
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
614
0, NULL);
516
custom_argv[0] = argv[0];
517
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0,
518
&plugin_list);
615
519
if (ret == ARGP_ERR_UNKNOWN){
616
520
fprintf(stderr, "Unknown error while parsing arguments\n");
617
521
exitstatus = EXIT_FAILURE;
619
523
}
620
524
}
621
525
622
/* Parse actual command line arguments, to let them override the
623
config file */
624
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
625
if (ret == ARGP_ERR_UNKNOWN){
626
fprintf(stderr, "Unknown error while parsing arguments\n");
627
exitstatus = EXIT_FAILURE;
628
goto fallback;
629
}
630
631
526
if(debug){
632
527
for(plugin *p = plugin_list; p != NULL; p=p->next){
633
528
fprintf(stderr, "Plugin: %s has %d arguments\n",
642
537
}
643
538
}
644
539
645
/* Strip permissions down to nobody */
646
540
ret = setuid(uid);
647
541
if (ret == -1){
648
542
perror("setuid");
649
}
543
}
544
650
545
setgid(gid);
651
546
if (ret == -1){
652
547
perror("setgid");
653
548
}
654
549
655
if (plugindir == NULL){
656
dir = opendir(PDIR);
657
} else {
658
dir = opendir(plugindir);
659
}
660
550
dir = opendir(plugindir);
661
551
if(dir == NULL){
662
552
perror("Could not open plugin dir");
663
553
exitstatus = EXIT_FAILURE;
679
569
680
570
FD_ZERO(&rfds_all);
681
571
682
/* Read and execute any executable in the plugin directory*/
683
572
while(true){
684
573
dirst = readdir(dir);
685
574
686
/* All directory entries have been processed */
575
// All directory entries have been processed
687
576
if(dirst == NULL){
688
577
if (errno == EBADF){
689
578
perror("readdir");
695
584
696
585
d_name_len = strlen(dirst->d_name);
697
586
698
/* Ignore dotfiles, backup files and other junk */
587
// Ignore dotfiles, backup files and other junk
699
588
{
700
589
bool bad_name = false;
701
590
716
605
break;
717
606
}
718
607
}
608
719
609
if(bad_name){
720
610
continue;
721
611
}
612
722
613
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
723
614
size_t suf_len = strlen(*suf);
724
615
if((d_name_len >= suf_len)
739
630
}
740
631
741
632
char *filename;
742
if(plugindir == NULL){
743
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
744
} else {
745
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
746
}
633
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
747
634
if(ret < 0){
748
635
perror("asprintf");
749
636
continue;
755
642
free(filename);
756
643
continue;
757
644
}
758
759
/* Ignore non-executable files */
645
760
646
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
761
647
if(debug){
762
648
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
765
651
free(filename);
766
652
continue;
767
653
}
768
769
plugin *p = getplugin(dirst->d_name);
654
plugin *p = getplugin(dirst->d_name, &plugin_list);
770
655
if(p == NULL){
771
656
perror("getplugin");
772
657
free(filename);
782
667
}
783
668
{
784
669
/* Add global arguments to argument list for this plugin */
785
plugin *g = getplugin(NULL);
670
plugin *g = getplugin(NULL, &plugin_list);
786
671
if(g != NULL){
787
672
for(char **a = g->argv + 1; *a != NULL; a++){
788
673
if(not add_argument(p, *a)){
791
676
}
792
677
/* Add global environment variables */
793
678
for(char **e = g->environ; *e != NULL; e++){
794
if(not add_environment(p, *e, false)){
679
if(not add_environment(p, *e)){
795
680
perror("add_environment");
796
681
}
797
682
}
802
687
process, too. */
803
688
if(p->environ[0] != NULL){
804
689
for(char **e = environ; *e != NULL; e++){
805
if(not add_environment(p, *e, false)){
690
char *copy = strdup(*e);
691
if(copy == NULL){
692
perror("strdup");
693
continue;
694
}
695
if(not add_environment(p, copy)){
806
696
perror("add_environment");
807
697
}
808
698
}
815
705
exitstatus = EXIT_FAILURE;
816
706
goto fallback;
817
707
}
818
/* Ask OS to automatic close the pipe on exec */
819
708
ret = set_cloexec_flag(pipefd[0]);
820
709
if(ret < 0){
821
710
perror("set_cloexec_flag");
835
724
exitstatus = EXIT_FAILURE;
836
725
goto fallback;
837
726
}
838
/* Starting a new process to be watched */
727
// Starting a new process to be watched
839
728
pid_t pid = fork();
840
729
if(pid == -1){
841
730
perror("fork");
879
768
}
880
769
/* no return */
881
770
}
882
/* Parent process */
883
close(pipefd[1]); /* Close unused write end of pipe */
771
/* parent process */
884
772
free(filename);
885
plugin *new_plugin = getplugin(dirst->d_name);
886
if (new_plugin == NULL){
887
perror("getplugin");
773
close(pipefd[1]); /* close unused write end of pipe */
774
process *new_process = malloc(sizeof(process));
775
if (new_process == NULL){
776
perror("malloc");
888
777
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
889
778
if(ret < 0){
890
perror("sigprocmask");
779
perror("sigprocmask");
891
780
}
892
781
exitstatus = EXIT_FAILURE;
893
782
goto fallback;
894
783
}
895
784
896
new_plugin->pid = pid;
897
new_plugin->fd = pipefd[0];
898
785
*new_process = (struct process){ .pid = pid,
786
.fd = pipefd[0],
787
.next = process_list };
788
// List handling
789
process_list = new_process;
899
790
/* Unblock SIGCHLD so signal handler can be run if this process
900
791
has already completed */
901
792
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
905
796
goto fallback;
906
797
}
907
798
908
FD_SET(new_plugin->fd, &rfds_all);
799
FD_SET(new_process->fd, &rfds_all);
909
800
910
if (maxfd < new_plugin->fd){
911
maxfd = new_plugin->fd;
801
if (maxfd < new_process->fd){
802
maxfd = new_process->fd;
912
803
}
913
804
914
805
}
915
806
807
free_plugin_list(plugin_list);
808
plugin_list = NULL;
809
916
810
closedir(dir);
917
811
dir = NULL;
918
919
for(plugin *p = plugin_list; p != NULL; p = p->next){
920
if(p->pid != 0){
921
break;
922
}
923
if(p->next == NULL){
924
fprintf(stderr, "No plugin processes started. Incorrect plugin"
925
" directory?\n");
926
free_plugin_list();
927
}
812
813
if (process_list == NULL){
814
fprintf(stderr, "No plugin processes started. Incorrect plugin"
815
" directory?\n");
816
process_list = NULL;
928
817
}
929
930
/* Main loop while running plugins exist */
931
while(plugin_list){
818
while(process_list){
932
819
fd_set rfds = rfds_all;
933
820
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
934
821
if (select_ret == -1){
938
825
}
939
826
/* OK, now either a process completed, or something can be read
940
827
from one of them */
941
for(plugin *proc = plugin_list; proc != NULL;){
828
for(process *proc = process_list; proc ; proc = proc->next){
942
829
/* Is this process completely done? */
943
830
if(proc->eof and proc->completed){
944
831
/* Only accept the plugin output if it exited cleanly */
945
832
if(not WIFEXITED(proc->status)
946
833
or WEXITSTATUS(proc->status) != 0){
947
834
/* Bad exit by plugin */
948
949
835
if(debug){
950
836
if(WIFEXITED(proc->status)){
951
837
fprintf(stderr, "Plugin %u exited with status %d\n",
960
846
(unsigned int) (proc->pid));
961
847
}
962
848
}
963
964
849
/* Remove the plugin */
965
850
FD_CLR(proc->fd, &rfds_all);
966
967
851
/* Block signal while modifying process_list */
968
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
969
853
if(ret < 0){
971
855
exitstatus = EXIT_FAILURE;
972
856
goto fallback;
973
857
}
974
858
/* Delete this process entry from the list */
859
if(process_list == proc){
860
/* First one - simple */
861
process_list = proc->next;
862
} else {
863
/* Second one or later */
864
for(process *p = process_list; p != NULL; p = p->next){
865
if(p->next == proc){
866
p->next = proc->next;
867
break;
868
}
869
}
870
}
975
871
/* We are done modifying process list, so unblock signal */
976
872
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
977
873
NULL);
978
874
if(ret < 0){
979
875
perror("sigprocmask");
980
exitstatus = EXIT_FAILURE;
981
goto fallback;
982
}
983
984
if(plugin_list == NULL){
985
break;
986
}
987
988
plugin *next_plugin = proc->next;
989
free_plugin(proc);
990
proc = next_plugin;
991
continue;
876
}
877
free(proc->buffer);
878
free(proc);
879
/* We deleted this process from the list, so we can't go
880
proc->next. Therefore, start over from the beginning of
881
the process list */
882
break;
992
883
}
993
994
884
/* This process exited nicely, so print its buffer */
995
885
996
886
bool bret = print_out_password(proc->buffer,
1001
891
}
1002
892
goto fallback;
1003
893
}
1004
1005
894
/* This process has not completed. Does it have any output? */
1006
895
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1007
896
/* This process had nothing to say at this time */
1008
proc = proc->next;
1009
897
continue;
1010
898
}
1011
899
/* Before reading, make the process' data buffer large enough */
1024
912
BUFFER_SIZE);
1025
913
if(ret < 0){
1026
914
/* Read error from this process; ignore the error */
1027
proc = proc->next;
1028
915
continue;
1029
916
}
1030
917
if(ret == 0){
1039
926
1040
927
fallback:
1041
928
1042
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
929
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1043
930
/* Fallback if all plugins failed, none are found or an error
1044
931
occured */
1045
932
bool bret;
1046
933
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1047
934
char *passwordbuffer = getpass("Password: ");
1048
size_t len = strlen(passwordbuffer);
1049
/* Strip trailing newline */
1050
if(len > 0 and passwordbuffer[len-1] == '\n'){
1051
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1052
len--;
1053
}
1054
bret = print_out_password(passwordbuffer, len);
935
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1055
936
if(not bret){
1056
937
perror("print_out_password");
1057
938
exitstatus = EXIT_FAILURE;
1066
947
}
1067
948
1068
949
if(custom_argv != NULL){
1069
for(char **arg = custom_argv+1; *arg != NULL; arg++){
950
for(char **arg = custom_argv; *arg != NULL; arg++){
1070
951
free(*arg);
1071
952
}
1072
953
free(custom_argv);
1073
954
}
955
free_plugin_list(plugin_list);
1074
956
1075
957
if(dir != NULL){
1076
958
closedir(dir);
1077
959
}
1078
960
1079
961
/* Free the process list and kill the processes */
1080
for(plugin *p = plugin_list; p != NULL; p = p->next){
1081
if(p->pid != 0){
1082
close(p->fd);
1083
ret = kill(p->pid, SIGTERM);
1084
if(ret == -1 and errno != ESRCH){
1085
/* Set-uid proccesses might not get closed */
1086
perror("kill");
1087
}
962
for(process *next; process_list != NULL; process_list = next){
963
next = process_list->next;
964
close(process_list->fd);
965
ret = kill(process_list->pid, SIGTERM);
966
if(ret == -1 and errno != ESRCH){
967
/* set-uid proccesses migth not get closed */
968
perror("kill");
1088
969
}
970
free(process_list->buffer);
971
free(process_list);
1089
972
}
1090
973
1091
974
/* Wait for any remaining child processes to terminate */
1095
978
if(errno != ECHILD){
1096
979
perror("wait");
1097
980
}
1098
1099
free_plugin_list();
1100
1101
free(plugindir);
1102
free(argfile);
1103
981
1104
982
return exitstatus;
1105
983
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0