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- Committer: Teddy Hogeborn
- Date: 2008-08-16 16:58:31 UTC
- Revision ID: teddy@fukt.bsnet.se-20080816165831-cx018vo5i9oqmgo0
* plugins.d/password-request.c (main): Include environment variables
"cryptsource" and "crypttarget"
in password prompt.
"cryptsource" and "crypttarget"
in password prompt.
- files added:
- network-protocol.txt
- files removed:
- .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,
60
error_t */
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
61
60
#include <signal.h> /* struct sigaction, sigemptyset(),
62
61
sigaddset(), sigaction(),
63
62
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
64
#include <errno.h> /* errno, EBADF */
66
65
67
66
#define BUFFER_SIZE 256
68
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
68
72
69
const char *argp_program_version = "plugin-runner 1.0";
73
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
71
75
struct plugin;
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;
76
85
77
86
typedef struct plugin{
78
87
char *name; /* can be NULL or any plugin name */
81
90
char **environ;
82
91
int envc;
83
92
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;
94
93
struct plugin *next;
95
94
} plugin;
96
95
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){
96
static plugin *getplugin(char *name, plugin **plugin_list){
97
for (plugin *p = *plugin_list; p != NULL; p = p->next){
104
98
if ((p->name == name)
105
99
or (p->name and name and (strcmp(p->name, name) == 0))){
106
100
return p;
111
105
if (new_plugin == NULL){
112
106
return NULL;
113
107
}
114
char *copy_name = NULL;
115
if(name != NULL){
116
copy_name = strdup(name);
117
if(copy_name == NULL){
118
return NULL;
119
}
120
}
121
122
*new_plugin = (plugin) { .name = copy_name,
108
*new_plugin = (plugin) { .name = name,
123
109
.argc = 1,
110
.envc = 0,
124
111
.disabled = false,
125
.next = plugin_list };
112
.next = *plugin_list };
126
113
127
114
new_plugin->argv = malloc(sizeof(char *) * 2);
128
115
if (new_plugin->argv == NULL){
129
free(copy_name);
130
116
free(new_plugin);
131
117
return NULL;
132
118
}
133
new_plugin->argv[0] = copy_name;
119
new_plugin->argv[0] = name;
134
120
new_plugin->argv[1] = NULL;
135
121
136
122
new_plugin->environ = malloc(sizeof(char *));
137
123
if(new_plugin->environ == NULL){
138
free(copy_name);
139
124
free(new_plugin->argv);
140
125
free(new_plugin);
141
126
return NULL;
142
127
}
143
128
new_plugin->environ[0] = NULL;
144
145
129
/* Append the new plugin to the list */
146
plugin_list = new_plugin;
130
*plugin_list = new_plugin;
147
131
return new_plugin;
148
132
}
149
133
179
163
}
180
164
181
165
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def, bool replace){
166
static bool add_environment(plugin *p, const char *def){
183
167
if(p == NULL){
184
168
return false;
185
169
}
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
170
return add_to_char_array(def, &(p->environ), &(p->envc));
204
171
}
205
172
173
206
174
/*
207
175
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
176
* Descriptor Flags".
219
187
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
220
188
}
221
189
190
process *process_list = NULL;
222
191
223
/* Mark processes as completed when they exit, and save their exit
192
/* Mark a process as completed when it exits, and save its exit
224
193
status. */
225
194
void handle_sigchld(__attribute__((unused)) int sig){
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
}
195
process *proc = process_list;
196
int status;
197
pid_t pid = wait(&status);
198
if(pid == -1){
199
perror("wait");
200
return;
201
}
202
while(proc != NULL and proc->pid != pid){
203
proc = proc->next;
204
}
205
if(proc == NULL){
206
/* Process not found in process list */
207
return;
208
}
209
proc->status = status;
210
proc->completed = true;
253
211
}
254
212
255
/* Prints out a password to stdout */
256
213
bool print_out_password(const char *buffer, size_t length){
257
214
ssize_t ret;
215
if(length>0 and buffer[length-1] == '\n'){
216
length--;
217
}
258
218
for(size_t written = 0; written < length; written += (size_t)ret){
259
219
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
260
220
length - written));
265
225
return true;
266
226
}
267
227
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
}
228
char **add_to_argv(char **argv, int *argc, char *arg){
229
if (argv == NULL){
230
*argc = 1;
231
argv = malloc(sizeof(char*) * 2);
232
if(argv == NULL){
233
return NULL;
292
234
}
293
}
294
295
free(plugin_node);
296
}
297
298
static void free_plugin_list(void){
299
while(plugin_list != NULL){
300
free_plugin(plugin_list);
301
}
235
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
236
argv[1] = NULL;
237
}
238
*argc += 1;
239
argv = realloc(argv, sizeof(char *)
240
* ((unsigned int) *argc + 1));
241
if(argv == NULL){
242
return NULL;
243
}
244
argv[*argc-1] = arg;
245
argv[*argc] = NULL;
246
return argv;
302
247
}
303
248
304
249
int main(int argc, char *argv[]){
305
char *plugindir = NULL;
306
char *argfile = NULL;
250
const char *plugindir = "/lib/mandos/plugins.d";
251
const char *argfile = ARGFILE;
307
252
FILE *conffp;
308
253
size_t d_name_len;
309
254
DIR *dir = NULL;
324
269
/* Establish a signal handler */
325
270
sigemptyset(&sigchld_action.sa_mask);
326
271
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
327
if(ret == -1){
272
if(ret < 0){
328
273
perror("sigaddset");
329
exitstatus = EXIT_FAILURE;
330
goto fallback;
274
exit(EXIT_FAILURE);
331
275
}
332
276
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
333
if(ret == -1){
277
if(ret < 0){
334
278
perror("sigaction");
335
exitstatus = EXIT_FAILURE;
336
goto fallback;
279
exit(EXIT_FAILURE);
337
280
}
338
281
339
282
/* The options we understand. */
341
284
{ .name = "global-options", .key = 'g',
342
285
.arg = "OPTION[,OPTION[,...]]",
343
286
.doc = "Options passed to all plugins" },
344
{ .name = "global-env", .key = 'G',
287
{ .name = "global-envs", .key = 'e',
345
288
.arg = "VAR=value",
346
289
.doc = "Environment variable passed to all plugins" },
347
290
{ .name = "options-for", .key = 'o',
348
291
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
349
292
.doc = "Options passed only to specified plugin" },
350
{ .name = "env-for", .key = 'E',
293
{ .name = "envs-for", .key = 'f',
351
294
.arg = "PLUGIN:ENV=value",
352
295
.doc = "Environment variable passed to specified plugin" },
353
296
{ .name = "disable", .key = 'd',
354
297
.arg = "PLUGIN",
355
298
.doc = "Disable a specific plugin", .group = 1 },
356
{ .name = "enable", .key = 'e',
357
.arg = "PLUGIN",
358
.doc = "Enable a specific plugin", .group = 1 },
359
299
{ .name = "plugin-dir", .key = 128,
360
300
.arg = "DIRECTORY",
361
301
.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 },
302
{ .name = "userid", .key = 129,
303
.arg = "ID", .flags = 0,
304
.doc = "User ID the plugins will run as", .group = 2 },
305
{ .name = "groupid", .key = 130,
306
.arg = "ID", .flags = 0,
307
.doc = "Group ID the plugins will run as", .group = 2 },
308
{ .name = "debug", .key = 131,
309
.doc = "Debug mode", .group = 3 },
373
310
{ .name = NULL }
374
311
};
375
312
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
313
error_t parse_opt (int key, char *arg, struct argp_state *state) {
314
/* Get the INPUT argument from `argp_parse', which we know is a
315
pointer to our plugin list pointer. */
316
plugin **plugins = state->input;
378
317
switch (key) {
379
case 'g': /* --global-options */
318
case 'g':
380
319
if (arg != NULL){
381
320
char *p;
382
321
while((p = strsep(&arg, ",")) != NULL){
383
322
if(p[0] == '\0'){
384
323
continue;
385
324
}
386
if(not add_argument(getplugin(NULL), p)){
325
if(not add_argument(getplugin(NULL, plugins), p)){
387
326
perror("add_argument");
388
327
return ARGP_ERR_UNKNOWN;
389
328
}
390
329
}
391
330
}
392
331
break;
393
case 'G': /* --global-env */
332
case 'e':
394
333
if(arg == NULL){
395
334
break;
396
335
}
399
338
if(envdef == NULL){
400
339
break;
401
340
}
402
if(not add_environment(getplugin(NULL), envdef, true)){
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
403
342
perror("add_environment");
404
343
}
405
344
}
406
345
break;
407
case 'o': /* --options-for */
346
case 'o':
408
347
if (arg != NULL){
409
348
char *p_name = strsep(&arg, ":");
410
if(p_name[0] == '\0' or arg == NULL){
349
if(p_name[0] == '\0'){
411
350
break;
412
351
}
413
352
char *opt = strsep(&arg, ":");
414
if(opt[0] == '\0' or opt == NULL){
353
if(opt[0] == '\0'){
415
354
break;
416
355
}
417
char *p;
418
while((p = strsep(&opt, ",")) != NULL){
419
if(p[0] == '\0'){
420
continue;
421
}
422
if(not add_argument(getplugin(p_name), p)){
423
perror("add_argument");
424
return ARGP_ERR_UNKNOWN;
356
if(opt != NULL){
357
char *p;
358
while((p = strsep(&opt, ",")) != NULL){
359
if(p[0] == '\0'){
360
continue;
361
}
362
if(not add_argument(getplugin(p_name, plugins), p)){
363
perror("add_argument");
364
return ARGP_ERR_UNKNOWN;
365
}
425
366
}
426
367
}
427
368
}
428
369
break;
429
case 'E': /* --env-for */
370
case 'f':
430
371
if(arg == NULL){
431
372
break;
432
373
}
440
381
break;
441
382
}
442
383
envdef++;
443
if(not add_environment(getplugin(p_name), envdef, true)){
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
444
385
perror("add_environment");
445
386
}
446
387
}
447
388
break;
448
case 'd': /* --disable */
389
case 'd':
449
390
if (arg != NULL){
450
plugin *p = getplugin(arg);
391
plugin *p = getplugin(arg, plugins);
451
392
if(p == NULL){
452
393
return ARGP_ERR_UNKNOWN;
453
394
}
454
395
p->disabled = true;
455
396
}
456
397
break;
457
case 'e': /* --enable */
458
if (arg != NULL){
459
plugin *p = getplugin(arg);
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
462
}
463
p->disabled = false;
464
}
465
break;
466
case 128: /* --plugin-dir */
467
plugindir = strdup(arg);
468
if(plugindir == NULL){
469
perror("strdup");
470
}
471
break;
472
case 129: /* --config-file */
473
/* This is already done by parse_opt_config_file() */
474
break;
475
case 130: /* --userid */
398
case 128:
399
plugindir = arg;
400
break;
401
case 129:
476
402
uid = (uid_t)strtol(arg, NULL, 10);
477
403
break;
478
case 131: /* --groupid */
404
case 130:
479
405
gid = (gid_t)strtol(arg, NULL, 10);
480
406
break;
481
case 132: /* --debug */
407
case 131:
482
408
debug = true;
483
409
break;
484
410
case ARGP_KEY_ARG:
492
418
return 0;
493
419
}
494
420
495
/* This option parser is the same as parse_opt() above, except it
496
ignores everything but the --config-file option. */
497
error_t parse_opt_config_file (int key, char *arg,
498
__attribute__((unused))
499
struct argp_state *state) {
500
switch (key) {
501
case 'g': /* --global-options */
502
case 'G': /* --global-env */
503
case 'o': /* --options-for */
504
case 'E': /* --env-for */
505
case 'd': /* --disable */
506
case 'e': /* --enable */
507
case 128: /* --plugin-dir */
508
break;
509
case 129: /* --config-file */
510
argfile = strdup(arg);
511
if(argfile == NULL){
512
perror("strdup");
513
}
514
break;
515
case 130: /* --userid */
516
case 131: /* --groupid */
517
case 132: /* --debug */
518
case ARGP_KEY_ARG:
519
case ARGP_KEY_END:
520
break;
521
default:
522
return ARGP_ERR_UNKNOWN;
523
}
524
return 0;
525
}
421
plugin *plugin_list = NULL;
526
422
527
struct argp argp = { .options = options,
528
.parser = parse_opt_config_file,
529
.args_doc = "",
423
struct argp argp = { .options = options, .parser = parse_opt,
424
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
530
425
.doc = "Mandos plugin runner -- Run plugins" };
531
426
532
/* Parse using the parse_opt_config_file in order to get the custom
533
config file location, if any. */
534
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
427
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
535
428
if (ret == ARGP_ERR_UNKNOWN){
536
429
fprintf(stderr, "Unknown error while parsing arguments\n");
537
430
exitstatus = EXIT_FAILURE;
538
goto fallback;
431
goto end;
539
432
}
540
541
/* Reset to the normal argument parser */
542
argp.parser = parse_opt;
543
544
/* Open the configfile if available */
545
if (argfile == NULL){
546
conffp = fopen(AFILE, "r");
547
} else {
548
conffp = fopen(argfile, "r");
549
}
433
434
conffp = fopen(argfile, "r");
550
435
if(conffp != NULL){
551
436
char *org_line = NULL;
552
char *p, *arg, *new_arg, *line;
553
437
size_t size = 0;
554
438
ssize_t sret;
439
char *p, *arg, *new_arg, *line;
555
440
const char whitespace_delims[] = " \r\t\f\v\n";
556
441
const char comment_delim[] = "#";
557
442
558
custom_argc = 1;
559
custom_argv = malloc(sizeof(char*) * 2);
560
if(custom_argv == NULL){
561
perror("malloc");
562
exitstatus = EXIT_FAILURE;
563
goto fallback;
564
}
565
custom_argv[0] = argv[0];
566
custom_argv[1] = NULL;
567
568
/* for each line in the config file, strip whitespace and ignore
569
commented text */
570
443
while(true){
571
444
sret = getline(&org_line, &size, conffp);
572
445
if(sret == -1){
580
453
continue;
581
454
}
582
455
new_arg = strdup(p);
583
if(new_arg == NULL){
584
perror("strdup");
585
exitstatus = EXIT_FAILURE;
586
free(org_line);
587
goto fallback;
588
}
589
590
custom_argc += 1;
591
custom_argv = realloc(custom_argv, sizeof(char *)
592
* ((unsigned int) custom_argc + 1));
593
if(custom_argv == NULL){
594
perror("realloc");
595
exitstatus = EXIT_FAILURE;
596
free(org_line);
597
goto fallback;
598
}
599
custom_argv[custom_argc-1] = new_arg;
600
custom_argv[custom_argc] = NULL;
456
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
457
if (custom_argv == NULL){
458
perror("add_to_argv");
459
exitstatus = EXIT_FAILURE;
460
goto end;
461
}
601
462
}
602
463
}
603
464
free(org_line);
604
} else {
465
} else{
605
466
/* Check for harmful errors and go to fallback. Other errors might
606
467
not affect opening plugins */
607
468
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
608
469
perror("fopen");
609
470
exitstatus = EXIT_FAILURE;
610
goto fallback;
471
goto end;
611
472
}
612
473
}
613
/* If there was any arguments from configuration file,
614
pass them to parser as command arguments */
474
615
475
if(custom_argv != NULL){
616
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
617
0, NULL);
476
custom_argv[0] = argv[0];
477
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
618
478
if (ret == ARGP_ERR_UNKNOWN){
619
479
fprintf(stderr, "Unknown error while parsing arguments\n");
620
480
exitstatus = EXIT_FAILURE;
621
goto fallback;
481
goto end;
622
482
}
623
483
}
624
484
625
/* Parse actual command line arguments, to let them override the
626
config file */
627
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
628
if (ret == ARGP_ERR_UNKNOWN){
629
fprintf(stderr, "Unknown error while parsing arguments\n");
630
exitstatus = EXIT_FAILURE;
631
goto fallback;
632
}
633
634
485
if(debug){
635
486
for(plugin *p = plugin_list; p != NULL; p=p->next){
636
487
fprintf(stderr, "Plugin: %s has %d arguments\n",
645
496
}
646
497
}
647
498
648
/* Strip permissions down to nobody */
649
499
ret = setuid(uid);
650
500
if (ret == -1){
651
501
perror("setuid");
652
}
502
}
503
653
504
setgid(gid);
654
505
if (ret == -1){
655
506
perror("setgid");
656
507
}
657
508
658
if (plugindir == NULL){
659
dir = opendir(PDIR);
660
} else {
661
dir = opendir(plugindir);
662
}
663
509
dir = opendir(plugindir);
664
510
if(dir == NULL){
665
511
perror("Could not open plugin dir");
666
512
exitstatus = EXIT_FAILURE;
667
goto fallback;
513
goto end;
668
514
}
669
515
670
516
/* Set the FD_CLOEXEC flag on the directory, if possible */
675
521
if(ret < 0){
676
522
perror("set_cloexec_flag");
677
523
exitstatus = EXIT_FAILURE;
678
goto fallback;
524
goto end;
679
525
}
680
526
}
681
527
}
682
528
683
529
FD_ZERO(&rfds_all);
684
530
685
/* Read and execute any executable in the plugin directory*/
686
531
while(true){
687
532
dirst = readdir(dir);
688
533
689
/* All directory entries have been processed */
534
// All directory entries have been processed
690
535
if(dirst == NULL){
691
536
if (errno == EBADF){
692
537
perror("readdir");
693
538
exitstatus = EXIT_FAILURE;
694
goto fallback;
539
goto end;
695
540
}
696
541
break;
697
542
}
698
543
699
544
d_name_len = strlen(dirst->d_name);
700
545
701
/* Ignore dotfiles, backup files and other junk */
546
// Ignore dotfiles, backup files and other junk
702
547
{
703
548
bool bad_name = false;
704
549
719
564
break;
720
565
}
721
566
}
567
722
568
if(bad_name){
723
569
continue;
724
570
}
571
725
572
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
726
573
size_t suf_len = strlen(*suf);
727
574
if((d_name_len >= suf_len)
742
589
}
743
590
744
591
char *filename;
745
if(plugindir == NULL){
746
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
747
} else {
748
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
749
}
592
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
750
593
if(ret < 0){
751
594
perror("asprintf");
752
595
continue;
758
601
free(filename);
759
602
continue;
760
603
}
761
762
/* Ignore non-executable files */
604
763
605
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
764
606
if(debug){
765
607
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
768
610
free(filename);
769
611
continue;
770
612
}
771
772
plugin *p = getplugin(dirst->d_name);
613
plugin *p = getplugin(dirst->d_name, &plugin_list);
773
614
if(p == NULL){
774
615
perror("getplugin");
775
616
free(filename);
785
626
}
786
627
{
787
628
/* Add global arguments to argument list for this plugin */
788
plugin *g = getplugin(NULL);
629
plugin *g = getplugin(NULL, &plugin_list);
789
630
if(g != NULL){
790
631
for(char **a = g->argv + 1; *a != NULL; a++){
791
632
if(not add_argument(p, *a)){
794
635
}
795
636
/* Add global environment variables */
796
637
for(char **e = g->environ; *e != NULL; e++){
797
if(not add_environment(p, *e, false)){
638
if(not add_environment(p, *e)){
798
639
perror("add_environment");
799
640
}
800
641
}
805
646
process, too. */
806
647
if(p->environ[0] != NULL){
807
648
for(char **e = environ; *e != NULL; e++){
808
if(not add_environment(p, *e, false)){
649
char *copy = strdup(*e);
650
if(copy == NULL){
651
perror("strdup");
652
continue;
653
}
654
if(not add_environment(p, copy)){
809
655
perror("add_environment");
810
656
}
811
657
}
812
658
}
813
659
814
int pipefd[2];
660
int pipefd[2];
815
661
ret = pipe(pipefd);
816
662
if (ret == -1){
817
663
perror("pipe");
818
664
exitstatus = EXIT_FAILURE;
819
goto fallback;
665
goto end;
820
666
}
821
/* Ask OS to automatic close the pipe on exec */
822
667
ret = set_cloexec_flag(pipefd[0]);
823
668
if(ret < 0){
824
669
perror("set_cloexec_flag");
825
670
exitstatus = EXIT_FAILURE;
826
goto fallback;
671
goto end;
827
672
}
828
673
ret = set_cloexec_flag(pipefd[1]);
829
674
if(ret < 0){
830
675
perror("set_cloexec_flag");
831
676
exitstatus = EXIT_FAILURE;
832
goto fallback;
677
goto end;
833
678
}
834
679
/* Block SIGCHLD until process is safely in process list */
835
680
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
836
681
if(ret < 0){
837
682
perror("sigprocmask");
838
683
exitstatus = EXIT_FAILURE;
839
goto fallback;
684
goto end;
840
685
}
841
/* Starting a new process to be watched */
686
// Starting a new process to be watched
842
687
pid_t pid = fork();
843
688
if(pid == -1){
844
689
perror("fork");
845
690
exitstatus = EXIT_FAILURE;
846
goto fallback;
691
goto end;
847
692
}
848
693
if(pid == 0){
849
694
/* this is the child process */
882
727
}
883
728
/* no return */
884
729
}
885
/* Parent process */
886
close(pipefd[1]); /* Close unused write end of pipe */
730
/* parent process */
887
731
free(filename);
888
plugin *new_plugin = getplugin(dirst->d_name);
889
if (new_plugin == NULL){
890
perror("getplugin");
732
close(pipefd[1]); /* close unused write end of pipe */
733
process *new_process = malloc(sizeof(process));
734
if (new_process == NULL){
735
perror("malloc");
891
736
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
892
737
if(ret < 0){
893
perror("sigprocmask");
738
perror("sigprocmask");
894
739
}
895
740
exitstatus = EXIT_FAILURE;
896
goto fallback;
741
goto end;
897
742
}
898
743
899
new_plugin->pid = pid;
900
new_plugin->fd = pipefd[0];
901
744
*new_process = (struct process){ .pid = pid,
745
.fd = pipefd[0],
746
.next = process_list };
747
// List handling
748
process_list = new_process;
902
749
/* Unblock SIGCHLD so signal handler can be run if this process
903
750
has already completed */
904
751
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
905
752
if(ret < 0){
906
753
perror("sigprocmask");
907
754
exitstatus = EXIT_FAILURE;
908
goto fallback;
909
}
910
911
FD_SET(new_plugin->fd, &rfds_all);
912
913
if (maxfd < new_plugin->fd){
914
maxfd = new_plugin->fd;
915
}
916
755
goto end;
756
}
757
758
FD_SET(new_process->fd, &rfds_all);
759
760
if (maxfd < new_process->fd){
761
maxfd = new_process->fd;
762
}
763
764
}
765
766
/* Free the plugin list */
767
for(plugin *next; plugin_list != NULL; plugin_list = next){
768
next = plugin_list->next;
769
free(plugin_list->argv);
770
if(plugin_list->environ[0] != NULL){
771
for(char **e = plugin_list->environ; *e != NULL; e++){
772
free(*e);
773
}
774
}
775
free(plugin_list);
917
776
}
918
777
919
778
closedir(dir);
920
779
dir = NULL;
921
922
for(plugin *p = plugin_list; p != NULL; p = p->next){
923
if(p->pid != 0){
924
break;
925
}
926
if(p->next == NULL){
927
fprintf(stderr, "No plugin processes started. Incorrect plugin"
928
" directory?\n");
929
free_plugin_list();
930
}
780
781
if (process_list == NULL){
782
fprintf(stderr, "No plugin processes started. Incorrect plugin"
783
" directory?\n");
784
process_list = NULL;
931
785
}
932
933
/* Main loop while running plugins exist */
934
while(plugin_list){
786
while(process_list){
935
787
fd_set rfds = rfds_all;
936
788
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
937
789
if (select_ret == -1){
938
790
perror("select");
939
791
exitstatus = EXIT_FAILURE;
940
goto fallback;
792
goto end;
941
793
}
942
794
/* OK, now either a process completed, or something can be read
943
795
from one of them */
944
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
796
for(process *proc = process_list; proc ; proc = proc->next){
945
797
/* Is this process completely done? */
946
798
if(proc->eof and proc->completed){
947
799
/* Only accept the plugin output if it exited cleanly */
948
800
if(not WIFEXITED(proc->status)
949
801
or WEXITSTATUS(proc->status) != 0){
950
802
/* Bad exit by plugin */
951
952
803
if(debug){
953
804
if(WIFEXITED(proc->status)){
954
805
fprintf(stderr, "Plugin %u exited with status %d\n",
963
814
(unsigned int) (proc->pid));
964
815
}
965
816
}
966
967
817
/* Remove the plugin */
968
818
FD_CLR(proc->fd, &rfds_all);
969
970
819
/* Block signal while modifying process_list */
971
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
820
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
972
821
if(ret < 0){
973
822
perror("sigprocmask");
974
823
exitstatus = EXIT_FAILURE;
975
goto fallback;
976
}
977
free_plugin(proc);
824
goto end;
825
}
826
/* Delete this process entry from the list */
827
if(process_list == proc){
828
/* First one - simple */
829
process_list = proc->next;
830
} else {
831
/* Second one or later */
832
for(process *p = process_list; p != NULL; p = p->next){
833
if(p->next == proc){
834
p->next = proc->next;
835
break;
836
}
837
}
838
}
978
839
/* We are done modifying process list, so unblock signal */
979
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
980
841
NULL);
981
842
if(ret < 0){
982
843
perror("sigprocmask");
983
exitstatus = EXIT_FAILURE;
984
goto fallback;
985
}
986
987
if(plugin_list == NULL){
988
break;
989
}
990
continue;
844
}
845
free(proc->buffer);
846
free(proc);
847
/* We deleted this process from the list, so we can't go
848
proc->next. Therefore, start over from the beginning of
849
the process list */
850
break;
991
851
}
992
993
852
/* This process exited nicely, so print its buffer */
994
853
995
bool bret = print_out_password(proc->buffer,
996
proc->buffer_length);
854
bool bret = print_out_password(proc->buffer, proc->buffer_length);
997
855
if(not bret){
998
856
perror("print_out_password");
999
857
exitstatus = EXIT_FAILURE;
1000
858
}
1001
goto fallback;
859
goto end;
1002
860
}
1003
1004
861
/* This process has not completed. Does it have any output? */
1005
862
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1006
863
/* This process had nothing to say at this time */
1013
870
if (proc->buffer == NULL){
1014
871
perror("malloc");
1015
872
exitstatus = EXIT_FAILURE;
1016
goto fallback;
873
goto end;
1017
874
}
1018
875
proc->buffer_size += BUFFER_SIZE;
1019
876
}
1034
891
}
1035
892
1036
893
1037
fallback:
894
end:
1038
895
1039
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1040
/* Fallback if all plugins failed, none are found or an error
1041
occured */
896
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
897
/* Fallback if all plugins failed, none are found or an error occured */
1042
898
bool bret;
1043
899
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1044
900
char *passwordbuffer = getpass("Password: ");
1045
size_t len = strlen(passwordbuffer);
1046
/* Strip trailing newline */
1047
if(len > 0 and passwordbuffer[len-1] == '\n'){
1048
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1049
len--;
1050
}
1051
bret = print_out_password(passwordbuffer, len);
901
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1052
902
if(not bret){
1053
903
perror("print_out_password");
1054
904
exitstatus = EXIT_FAILURE;
905
goto end;
1055
906
}
1056
907
}
1057
908
1058
909
/* Restore old signal handler */
1059
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1060
if(ret == -1){
1061
perror("sigaction");
1062
exitstatus = EXIT_FAILURE;
1063
}
1064
1065
if(custom_argv != NULL){
1066
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1067
free(*arg);
910
sigaction(SIGCHLD, &old_sigchld_action, NULL);
911
912
free(custom_argv);
913
914
/* Free the plugin list */
915
for(plugin *next; plugin_list != NULL; plugin_list = next){
916
next = plugin_list->next;
917
free(plugin_list->argv);
918
if(plugin_list->environ[0] != NULL){
919
for(char **e = plugin_list->environ; *e != NULL; e++){
920
free(*e);
921
}
1068
922
}
1069
free(custom_argv);
923
free(plugin_list->environ);
924
free(plugin_list);
1070
925
}
1071
926
1072
927
if(dir != NULL){
1074
929
}
1075
930
1076
931
/* Free the process list and kill the processes */
1077
for(plugin *p = plugin_list; p != NULL; p = p->next){
1078
if(p->pid != 0){
1079
close(p->fd);
1080
ret = kill(p->pid, SIGTERM);
1081
if(ret == -1 and errno != ESRCH){
1082
/* Set-uid proccesses might not get closed */
1083
perror("kill");
1084
}
932
for(process *next; process_list != NULL; process_list = next){
933
next = process_list->next;
934
close(process_list->fd);
935
ret = kill(process_list->pid, SIGTERM);
936
if(ret == -1 and errno != ESRCH){
937
/* set-uid proccesses migth not get closed */
938
perror("kill");
1085
939
}
940
free(process_list->buffer);
941
free(process_list);
1086
942
}
1087
943
1088
944
/* Wait for any remaining child processes to terminate */
1092
948
if(errno != ECHILD){
1093
949
perror("wait");
1094
950
}
1095
1096
free_plugin_list();
1097
1098
free(plugindir);
1099
free(argfile);
1100
951
1101
952
return exitstatus;
1102
953
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0