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- Committer: Teddy Hogeborn
- Date: 2009-09-06 05:37:34 UTC
- mto: (24.1.140 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 264.
- Revision ID: teddy@fukt.bsnet.se-20090906053734-uf180lq30ivv4nfy
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
properly.
* plugins.d/mandos-client.c (start_mandos_communication): Bug fix:
move out "decrypted_buffer_size" to where it is needed.
* plugins.d/splashy.c (termination_handler): Save signal received.
(main): Check return value from "sigaddset()".
properly.
* plugins.d/mandos-client.c (start_mandos_communication): Bug fix:
move out "decrypted_buffer_size" to where it is needed.
* plugins.d/splashy.c (termination_handler): Save signal received.
(main): Check return value from "sigaddset()".
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 Björn Påhlsson
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
O_CLOEXEC, pipe2() */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
36
getgid() */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
41
WEXITSTATUS(), WTERMSIG(),
41
42
WCOREDUMP() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
44
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
57
58
#include <errno.h> /* errno */
58
59
#include <argp.h> /* struct argp_option, struct
59
60
argp_state, struct argp,
67
68
*/
68
69
#include <errno.h> /* errno, EBADF */
69
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
75
71
76
72
#define BUFFER_SIZE 256
77
73
78
74
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
76
82
77
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
79
85
80
typedef struct plugin{
86
81
char *name; /* can be NULL or any plugin name */
106
101
107
102
/* Gets an existing plugin based on name,
108
103
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
104
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
105
/* Check for exiting plugin with that name */
112
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
107
if((p->name == name)
114
108
or (p->name and name and (strcmp(p->name, name) == 0))){
117
111
}
118
112
/* Create a new plugin */
119
113
plugin *new_plugin = NULL;
120
do {
114
do{
121
115
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
116
}while(new_plugin == NULL and errno == EINTR);
123
117
if(new_plugin == NULL){
124
118
return NULL;
125
119
}
126
120
char *copy_name = NULL;
127
121
if(name != NULL){
128
do {
122
do{
129
123
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
124
}while(copy_name == NULL and errno == EINTR);
131
125
if(copy_name == NULL){
132
int e = errno;
133
126
free(new_plugin);
134
errno = e;
135
127
return NULL;
136
128
}
137
129
}
141
133
.disabled = false,
142
134
.next = plugin_list };
143
135
144
do {
136
do{
145
137
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
138
}while(new_plugin->argv == NULL and errno == EINTR);
147
139
if(new_plugin->argv == NULL){
148
int e = errno;
149
140
free(copy_name);
150
141
free(new_plugin);
151
errno = e;
152
142
return NULL;
153
143
}
154
144
new_plugin->argv[0] = copy_name;
155
145
new_plugin->argv[1] = NULL;
156
146
157
do {
147
do{
158
148
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
149
}while(new_plugin->environ == NULL and errno == EINTR);
160
150
if(new_plugin->environ == NULL){
161
int e = errno;
162
151
free(copy_name);
163
152
free(new_plugin->argv);
164
153
free(new_plugin);
165
errno = e;
166
154
return NULL;
167
155
}
168
156
new_plugin->environ[0] = NULL;
173
161
}
174
162
175
163
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
164
static bool add_to_char_array(const char *new, char ***array,
178
165
int *len){
179
166
/* Resize the pointed-to array to hold one more pointer */
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
167
do{
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
}while(*array == NULL and errno == EINTR);
185
171
/* Malloc check */
186
if(new_array == NULL){
172
if(*array == NULL){
187
173
return false;
188
174
}
189
*array = new_array;
190
175
/* Make a copy of the new string */
191
176
char *copy;
192
do {
177
do{
193
178
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
179
}while(copy == NULL and errno == EINTR);
195
180
if(copy == NULL){
196
181
return false;
197
182
}
204
189
}
205
190
206
191
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
208
192
static bool add_argument(plugin *p, const char *arg){
209
193
if(p == NULL){
210
194
return false;
213
197
}
214
198
215
199
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
217
200
static bool add_environment(plugin *p, const char *def, bool replace){
218
201
if(p == NULL){
219
202
return false;
221
204
/* namelen = length of name of environment variable */
222
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
206
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
226
209
/* It already exists */
227
210
if(replace){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
211
char *new;
212
do{
213
new = realloc(*e, strlen(def) + 1);
214
}while(new == NULL and errno == EINTR);
215
if(new == NULL){
233
216
return false;
234
217
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
218
*e = new;
219
strcpy(*e, def);
237
220
}
238
221
return true;
239
222
}
241
224
return add_to_char_array(def, &(p->environ), &(p->envc));
242
225
}
243
226
244
#ifndef O_CLOEXEC
245
227
/*
246
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
247
229
* Descriptor Flags".
248
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
249
231
*/
250
__attribute__((warn_unused_result))
251
232
static int set_cloexec_flag(int fd){
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
253
234
/* If reading the flags failed, return error indication now. */
254
235
if(ret < 0){
255
236
return ret;
256
237
}
257
238
/* Store modified flag word in the descriptor. */
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
260
240
}
261
#endif /* not O_CLOEXEC */
262
241
263
242
264
243
/* Mark processes as completed when they exit, and save their exit
278
257
/* No child processes */
279
258
break;
280
259
}
281
error(0, errno, "waitpid");
260
perror("waitpid");
282
261
}
283
262
284
263
/* A child exited, find it in process_list */
296
275
}
297
276
298
277
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
300
278
static bool print_out_password(const char *buffer, size_t length){
301
279
ssize_t ret;
302
280
for(size_t written = 0; written < length; written += (size_t)ret){
310
288
}
311
289
312
290
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
314
291
static void free_plugin(plugin *plugin_node){
315
292
316
293
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
348
325
349
326
int main(int argc, char *argv[]){
350
327
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
352
328
char *argfile = NULL;
353
329
FILE *conffp;
354
struct dirent **direntries = NULL;
330
size_t d_name_len;
331
DIR *dir = NULL;
332
struct dirent *dirst;
355
333
struct stat st;
356
334
fd_set rfds_all;
357
335
int ret, maxfd = 0;
365
343
.sa_flags = SA_NOCLDSTOP };
366
344
char **custom_argv = NULL;
367
345
int custom_argc = 0;
368
int dir_fd = -1;
369
346
370
347
/* Establish a signal handler */
371
348
sigemptyset(&sigchld_action.sa_mask);
372
349
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
373
350
if(ret == -1){
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
351
perror("sigaddset");
352
exitstatus = EXIT_FAILURE;
376
353
goto fallback;
377
354
}
378
355
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
379
356
if(ret == -1){
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
357
perror("sigaction");
358
exitstatus = EXIT_FAILURE;
382
359
goto fallback;
383
360
}
384
361
416
393
.doc = "Group ID the plugins will run as", .group = 3 },
417
394
{ .name = "debug", .key = 132,
418
395
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
420
.arg = "DIRECTORY",
421
.doc = "Specify a different plugin helper directory",
422
.group = 2 },
423
/*
424
* These reproduce what we would get without ARGP_NO_HELP
425
*/
426
{ .name = "help", .key = '?',
427
.doc = "Give this help list", .group = -1 },
428
{ .name = "usage", .key = -3,
429
.doc = "Give a short usage message", .group = -1 },
430
{ .name = "version", .key = 'V',
431
.doc = "Print program version", .group = -1 },
432
396
{ .name = NULL }
433
397
};
434
398
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
438
401
switch(key){
439
402
char *tmp;
440
intmax_t tmp_id;
403
intmax_t tmpmax;
441
404
case 'g': /* --global-options */
442
{
405
if(arg != NULL){
443
406
char *plugin_option;
444
407
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
445
411
if(not add_argument(getplugin(NULL), plugin_option)){
446
break;
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
447
414
}
448
415
}
449
errno = 0;
450
416
}
451
417
break;
452
418
case 'G': /* --global-env */
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
455
424
}
456
425
break;
457
426
case 'o': /* --options-for */
458
{
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*option_list = '\0';
466
option_list++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
char *option;
473
while((option = strsep(&option_list, ",")) != NULL){
474
if(not add_argument(getplugin(arg), option)){
475
break;
427
if(arg != NULL){
428
char *plugin_name = strsep(&arg, ":");
429
if(plugin_name[0] == '\0'){
430
break;
431
}
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(plugin_name), plugin_option)){
435
perror("add_argument");
436
return ARGP_ERR_UNKNOWN;
476
437
}
477
438
}
478
errno = 0;
479
439
}
480
440
break;
481
441
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
482
445
{
483
446
char *envdef = strchr(arg, ':');
484
447
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
487
448
break;
488
449
}
489
450
*envdef = '\0';
490
envdef++;
491
if(arg[0] == '\0'){
492
argp_error(state, "Empty plugin name");
493
errno = EINVAL;
494
break;
495
}
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
498
453
}
499
454
}
500
455
break;
501
456
case 'd': /* --disable */
502
{
457
if(arg != NULL){
503
458
plugin *p = getplugin(arg);
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
507
461
}
462
p->disabled = true;
508
463
}
509
464
break;
510
465
case 'e': /* --enable */
511
{
466
if(arg != NULL){
512
467
plugin *p = getplugin(arg);
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
516
470
}
471
p->disabled = false;
517
472
}
518
473
break;
519
474
case 128: /* --plugin-dir */
520
475
free(plugindir);
521
476
plugindir = strdup(arg);
522
if(plugindir != NULL){
523
errno = 0;
477
if(plugindir == NULL){
478
perror("strdup");
524
479
}
525
480
break;
526
481
case 129: /* --config-file */
527
482
/* This is already done by parse_opt_config_file() */
528
483
break;
529
484
case 130: /* --userid */
530
tmp_id = strtoimax(arg, &tmp, 10);
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
531
487
if(errno != 0 or tmp == arg or *tmp != '\0'
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
535
break;
488
or tmpmax != (uid_t)tmpmax){
489
fprintf(stderr, "Bad user ID number: \"%s\", using %"
490
PRIdMAX "\n", arg, (intmax_t)uid);
491
} else {
492
uid = (uid_t)tmpmax;
536
493
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
539
494
break;
540
495
case 131: /* --groupid */
541
tmp_id = strtoimax(arg, &tmp, 10);
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
542
498
if(errno != 0 or tmp == arg or *tmp != '\0'
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
546
break;
499
or tmpmax != (gid_t)tmpmax){
500
fprintf(stderr, "Bad group ID number: \"%s\", using %"
501
PRIdMAX "\n", arg, (intmax_t)gid);
502
} else {
503
gid = (gid_t)tmpmax;
547
504
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
550
505
break;
551
506
case 132: /* --debug */
552
507
debug = true;
553
508
break;
554
case 133: /* --plugin-helper-dir */
555
free(pluginhelperdir);
556
pluginhelperdir = strdup(arg);
557
if(pluginhelperdir != NULL){
558
errno = 0;
559
}
560
break;
561
/*
562
* These reproduce what we would get without ARGP_NO_HELP
563
*/
564
case '?': /* --help */
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
case -3: /* --usage */
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
569
argp_state_help(state, state->out_stream,
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
571
case 'V': /* --version */
572
fprintf(state->out_stream, "%s\n", argp_program_version);
573
exit(EXIT_SUCCESS);
574
break;
575
509
/*
576
510
* When adding more options before this line, remember to also add a
577
511
* "case" to the "parse_opt_config_file" function below.
580
514
/* Cryptsetup always passes an argument, which is an empty
581
515
string if "none" was specified in /etc/crypttab. So if
582
516
argument was empty, we ignore it silently. */
583
if(arg[0] == '\0'){
584
break;
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
585
519
}
520
break;
521
case ARGP_KEY_END:
522
break;
586
523
default:
587
524
return ARGP_ERR_UNKNOWN;
588
525
}
589
return errno; /* Set to 0 at start */
526
return 0;
590
527
}
591
528
592
529
/* This option parser is the same as parse_opt() above, except it
594
531
error_t parse_opt_config_file(int key, char *arg,
595
532
__attribute__((unused))
596
533
struct argp_state *state){
597
errno = 0;
598
534
switch(key){
599
535
case 'g': /* --global-options */
600
536
case 'G': /* --global-env */
607
543
case 129: /* --config-file */
608
544
free(argfile);
609
545
argfile = strdup(arg);
610
if(argfile != NULL){
611
errno = 0;
546
if(argfile == NULL){
547
perror("strdup");
612
548
}
613
549
break;
614
550
case 130: /* --userid */
615
551
case 131: /* --groupid */
616
552
case 132: /* --debug */
617
case 133: /* --plugin-helper-dir */
618
case '?': /* --help */
619
case -3: /* --usage */
620
case 'V': /* --version */
621
553
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
622
555
break;
623
556
default:
624
557
return ARGP_ERR_UNKNOWN;
625
558
}
626
return errno;
559
return 0;
627
560
}
628
561
629
562
struct argp argp = { .options = options,
633
566
634
567
/* Parse using parse_opt_config_file() in order to get the custom
635
568
config file location, if any. */
636
ret = argp_parse(&argp, argc, argv,
637
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
638
NULL, NULL);
639
switch(ret){
640
case 0:
641
break;
642
case ENOMEM:
643
default:
644
errno = ret;
645
error(0, errno, "argp_parse");
646
exitstatus = EX_OSERR;
647
goto fallback;
648
case EINVAL:
649
exitstatus = EX_USAGE;
569
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
570
if(ret == ARGP_ERR_UNKNOWN){
571
fprintf(stderr, "Unknown error while parsing arguments\n");
572
exitstatus = EXIT_FAILURE;
650
573
goto fallback;
651
574
}
652
575
669
592
custom_argc = 1;
670
593
custom_argv = malloc(sizeof(char*) * 2);
671
594
if(custom_argv == NULL){
672
error(0, errno, "malloc");
673
exitstatus = EX_OSERR;
595
perror("malloc");
596
exitstatus = EXIT_FAILURE;
674
597
goto fallback;
675
598
}
676
599
custom_argv[0] = argv[0];
692
615
}
693
616
new_arg = strdup(p);
694
617
if(new_arg == NULL){
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
697
620
free(org_line);
698
621
goto fallback;
699
622
}
700
623
701
624
custom_argc += 1;
702
{
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((unsigned int)
705
custom_argc + 1));
706
if(new_argv == NULL){
707
error(0, errno, "realloc");
708
exitstatus = EX_OSERR;
709
free(new_arg);
710
free(org_line);
711
goto fallback;
712
} else {
713
custom_argv = new_argv;
714
}
625
custom_argv = realloc(custom_argv, sizeof(char *)
626
* ((unsigned int) custom_argc + 1));
627
if(custom_argv == NULL){
628
perror("realloc");
629
exitstatus = EXIT_FAILURE;
630
free(org_line);
631
goto fallback;
715
632
}
716
633
custom_argv[custom_argc-1] = new_arg;
717
634
custom_argv[custom_argc] = NULL;
718
635
}
719
636
}
720
do {
637
do{
721
638
ret = fclose(conffp);
722
} while(ret == EOF and errno == EINTR);
639
}while(ret == EOF and errno == EINTR);
723
640
if(ret == EOF){
724
error(0, errno, "fclose");
725
exitstatus = EX_IOERR;
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
726
643
goto fallback;
727
644
}
728
645
free(org_line);
730
647
/* Check for harmful errors and go to fallback. Other errors might
731
648
not affect opening plugins */
732
649
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
735
652
goto fallback;
736
653
}
737
654
}
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
740
657
if(custom_argv != NULL){
741
ret = argp_parse(&argp, custom_argc, custom_argv,
742
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
743
NULL, NULL);
744
switch(ret){
745
case 0:
746
break;
747
case ENOMEM:
748
default:
749
errno = ret;
750
error(0, errno, "argp_parse");
751
exitstatus = EX_OSERR;
752
goto fallback;
753
case EINVAL:
754
exitstatus = EX_CONFIG;
658
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
659
0, NULL);
660
if(ret == ARGP_ERR_UNKNOWN){
661
fprintf(stderr, "Unknown error while parsing arguments\n");
662
exitstatus = EXIT_FAILURE;
755
663
goto fallback;
756
664
}
757
665
}
758
666
759
667
/* Parse actual command line arguments, to let them override the
760
668
config file */
761
ret = argp_parse(&argp, argc, argv,
762
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
763
NULL, NULL);
764
switch(ret){
765
case 0:
766
break;
767
case ENOMEM:
768
default:
769
errno = ret;
770
error(0, errno, "argp_parse");
771
exitstatus = EX_OSERR;
772
goto fallback;
773
case EINVAL:
774
exitstatus = EX_USAGE;
775
goto fallback;
776
}
777
778
{
779
char *pluginhelperenv;
780
bool bret = true;
781
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
782
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
783
if(ret != -1){
784
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
785
}
786
if(ret == -1 or not bret){
787
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
788
" environment variable to \"%s\" for all plugins\n",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
}
791
if(ret != -1){
792
free(pluginhelperenv);
793
}
669
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
670
if(ret == ARGP_ERR_UNKNOWN){
671
fprintf(stderr, "Unknown error while parsing arguments\n");
672
exitstatus = EXIT_FAILURE;
673
goto fallback;
794
674
}
795
675
796
676
if(debug){
807
687
}
808
688
}
809
689
810
if(getuid() == 0){
811
/* Work around Debian bug #633582:
812
<http://bugs.debian.org/633582> */
813
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
814
if(plugindir_fd == -1){
815
if(errno != ENOENT){
816
error(0, errno, "open(\"" PDIR "\")");
817
}
818
} else {
819
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
820
if(ret == -1){
821
error(0, errno, "fstat");
822
} else {
823
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
824
ret = fchown(plugindir_fd, uid, gid);
825
if(ret == -1){
826
error(0, errno, "fchown");
827
}
828
}
829
}
830
TEMP_FAILURE_RETRY(close(plugindir_fd));
831
}
832
}
833
834
/* Lower permissions */
835
ret = setgid(gid);
690
/* Strip permissions down to nobody */
691
setgid(gid);
836
692
if(ret == -1){
837
error(0, errno, "setgid");
693
perror("setgid");
838
694
}
839
695
ret = setuid(uid);
840
696
if(ret == -1){
841
error(0, errno, "setuid");
842
}
843
844
/* Open plugin directory with close_on_exec flag */
697
perror("setuid");
698
}
699
700
if(plugindir == NULL){
701
dir = opendir(PDIR);
702
} else {
703
dir = opendir(plugindir);
704
}
705
706
if(dir == NULL){
707
perror("Could not open plugin dir");
708
exitstatus = EXIT_FAILURE;
709
goto fallback;
710
}
711
712
/* Set the FD_CLOEXEC flag on the directory, if possible */
845
713
{
846
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
847
#ifdef O_CLOEXEC
848
O_CLOEXEC
849
#else /* not O_CLOEXEC */
850
0
851
#endif /* not O_CLOEXEC */
852
);
853
if(dir_fd == -1){
854
error(0, errno, "Could not open plugin dir");
855
exitstatus = EX_UNAVAILABLE;
856
goto fallback;
857
}
858
859
#ifndef O_CLOEXEC
860
/* Set the FD_CLOEXEC flag on the directory */
861
ret = set_cloexec_flag(dir_fd);
862
if(ret < 0){
863
error(0, errno, "set_cloexec_flag");
864
exitstatus = EX_OSERR;
865
goto fallback;
866
}
867
#endif /* O_CLOEXEC */
868
}
869
870
int good_name(const struct dirent * const dirent){
871
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
872
"*.dpkg-old", "*.dpkg-bak",
873
"*.dpkg-divert", NULL };
874
#ifdef __GNUC__
875
#pragma GCC diagnostic push
876
#pragma GCC diagnostic ignored "-Wcast-qual"
877
#endif
878
for(const char **pat = (const char **)patterns;
879
*pat != NULL; pat++){
880
#ifdef __GNUC__
881
#pragma GCC diagnostic pop
882
#endif
883
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
884
!= FNM_NOMATCH){
885
if(debug){
886
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
887
" matching pattern %s\n", dirent->d_name, *pat);
888
}
889
return 0;
714
int dir_fd = dirfd(dir);
715
if(dir_fd >= 0){
716
ret = set_cloexec_flag(dir_fd);
717
if(ret < 0){
718
perror("set_cloexec_flag");
719
exitstatus = EXIT_FAILURE;
720
goto fallback;
890
721
}
891
722
}
892
return 1;
893
}
894
895
#ifdef __GLIBC__
896
#if __GLIBC_PREREQ(2, 15)
897
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
alphasort);
899
#else /* not __GLIBC_PREREQ(2, 15) */
900
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
901
&direntries, good_name, alphasort);
902
#endif /* not __GLIBC_PREREQ(2, 15) */
903
#else /* not __GLIBC__ */
904
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
905
&direntries, good_name, alphasort);
906
#endif /* not __GLIBC__ */
907
if(numplugins == -1){
908
error(0, errno, "Could not scan plugin dir");
909
direntries = NULL;
910
exitstatus = EX_OSERR;
911
goto fallback;
912
723
}
913
724
914
725
FD_ZERO(&rfds_all);
915
726
916
727
/* Read and execute any executable in the plugin directory*/
917
for(int i = 0; i < numplugins; i++){
918
919
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
920
if(plugin_fd == -1){
921
error(0, errno, "Could not open plugin");
922
free(direntries[i]);
728
while(true){
729
do{
730
dirst = readdir(dir);
731
}while(dirst == NULL and errno == EINTR);
732
733
/* All directory entries have been processed */
734
if(dirst == NULL){
735
if(errno == EBADF){
736
perror("readdir");
737
exitstatus = EXIT_FAILURE;
738
goto fallback;
739
}
740
break;
741
}
742
743
d_name_len = strlen(dirst->d_name);
744
745
/* Ignore dotfiles, backup files and other junk */
746
{
747
bool bad_name = false;
748
749
const char const *bad_prefixes[] = { ".", "#", NULL };
750
751
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
752
".dpkg-old",
753
".dpkg-bak",
754
".dpkg-divert", NULL };
755
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
756
size_t pre_len = strlen(*pre);
757
if((d_name_len >= pre_len)
758
and strncmp((dirst->d_name), *pre, pre_len) == 0){
759
if(debug){
760
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
761
" with bad prefix %s\n", dirst->d_name, *pre);
762
}
763
bad_name = true;
764
break;
765
}
766
}
767
if(bad_name){
768
continue;
769
}
770
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
771
size_t suf_len = strlen(*suf);
772
if((d_name_len >= suf_len)
773
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
774
== 0)){
775
if(debug){
776
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
777
" with bad suffix %s\n", dirst->d_name, *suf);
778
}
779
bad_name = true;
780
break;
781
}
782
}
783
784
if(bad_name){
785
continue;
786
}
787
}
788
789
char *filename;
790
if(plugindir == NULL){
791
ret = TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
792
dirst->d_name));
793
} else {
794
ret = TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s", plugindir,
795
dirst->d_name));
796
}
797
if(ret < 0){
798
perror("asprintf");
923
799
continue;
924
800
}
925
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
801
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
926
803
if(ret == -1){
927
error(0, errno, "stat");
928
TEMP_FAILURE_RETRY(close(plugin_fd));
929
free(direntries[i]);
804
perror("stat");
805
free(filename);
930
806
continue;
931
807
}
932
808
933
809
/* Ignore non-executable files */
934
810
if(not S_ISREG(st.st_mode)
935
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
936
X_OK, 0)) != 0)){
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
937
812
if(debug){
938
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
939
" with bad type or mode\n",
940
plugindir != NULL ? plugindir : PDIR,
941
direntries[i]->d_name);
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
814
" with bad type or mode\n", filename);
942
815
}
943
TEMP_FAILURE_RETRY(close(plugin_fd));
944
free(direntries[i]);
816
free(filename);
945
817
continue;
946
818
}
947
819
948
plugin *p = getplugin(direntries[i]->d_name);
820
plugin *p = getplugin(dirst->d_name);
949
821
if(p == NULL){
950
error(0, errno, "getplugin");
951
TEMP_FAILURE_RETRY(close(plugin_fd));
952
free(direntries[i]);
822
perror("getplugin");
823
free(filename);
953
824
continue;
954
825
}
955
826
if(p->disabled){
956
827
if(debug){
957
828
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
958
direntries[i]->d_name);
829
dirst->d_name);
959
830
}
960
TEMP_FAILURE_RETRY(close(plugin_fd));
961
free(direntries[i]);
831
free(filename);
962
832
continue;
963
833
}
964
834
{
967
837
if(g != NULL){
968
838
for(char **a = g->argv + 1; *a != NULL; a++){
969
839
if(not add_argument(p, *a)){
970
error(0, errno, "add_argument");
840
perror("add_argument");
971
841
}
972
842
}
973
843
/* Add global environment variables */
974
844
for(char **e = g->environ; *e != NULL; e++){
975
845
if(not add_environment(p, *e, false)){
976
error(0, errno, "add_environment");
846
perror("add_environment");
977
847
}
978
848
}
979
849
}
980
850
}
981
/* If this plugin has any environment variables, we need to
982
duplicate the environment from this process, too. */
851
/* If this plugin has any environment variables, we will call
852
using execve and need to duplicate the environment from this
853
process, too. */
983
854
if(p->environ[0] != NULL){
984
855
for(char **e = environ; *e != NULL; e++){
985
856
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
857
perror("add_environment");
987
858
}
988
859
}
989
860
}
990
861
991
862
int pipefd[2];
992
#ifndef O_CLOEXEC
993
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
994
#else /* O_CLOEXEC */
995
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
996
#endif /* O_CLOEXEC */
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
997
864
if(ret == -1){
998
error(0, errno, "pipe");
999
exitstatus = EX_OSERR;
1000
free(direntries[i]);
1001
goto fallback;
1002
}
1003
if(pipefd[0] >= FD_SETSIZE){
1004
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1005
FD_SETSIZE);
1006
TEMP_FAILURE_RETRY(close(pipefd[0]));
1007
TEMP_FAILURE_RETRY(close(pipefd[1]));
1008
exitstatus = EX_OSERR;
1009
free(direntries[i]);
1010
goto fallback;
1011
}
1012
#ifndef O_CLOEXEC
865
perror("pipe");
866
exitstatus = EXIT_FAILURE;
867
goto fallback;
868
}
1013
869
/* Ask OS to automatic close the pipe on exec */
1014
870
ret = set_cloexec_flag(pipefd[0]);
1015
871
if(ret < 0){
1016
error(0, errno, "set_cloexec_flag");
1017
TEMP_FAILURE_RETRY(close(pipefd[0]));
1018
TEMP_FAILURE_RETRY(close(pipefd[1]));
1019
exitstatus = EX_OSERR;
1020
free(direntries[i]);
872
perror("set_cloexec_flag");
873
exitstatus = EXIT_FAILURE;
1021
874
goto fallback;
1022
875
}
1023
876
ret = set_cloexec_flag(pipefd[1]);
1024
877
if(ret < 0){
1025
error(0, errno, "set_cloexec_flag");
1026
TEMP_FAILURE_RETRY(close(pipefd[0]));
1027
TEMP_FAILURE_RETRY(close(pipefd[1]));
1028
exitstatus = EX_OSERR;
1029
free(direntries[i]);
878
perror("set_cloexec_flag");
879
exitstatus = EXIT_FAILURE;
1030
880
goto fallback;
1031
881
}
1032
#endif /* not O_CLOEXEC */
1033
882
/* Block SIGCHLD until process is safely in process list */
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1035
&sigchld_action.sa_mask,
1036
NULL));
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
1037
886
if(ret < 0){
1038
error(0, errno, "sigprocmask");
1039
exitstatus = EX_OSERR;
1040
free(direntries[i]);
887
perror("sigprocmask");
888
exitstatus = EXIT_FAILURE;
1041
889
goto fallback;
1042
890
}
1043
891
/* Starting a new process to be watched */
1044
892
pid_t pid;
1045
do {
893
do{
1046
894
pid = fork();
1047
} while(pid == -1 and errno == EINTR);
895
}while(pid == -1 and errno == EINTR);
1048
896
if(pid == -1){
1049
error(0, errno, "fork");
1050
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1051
&sigchld_action.sa_mask, NULL));
1052
TEMP_FAILURE_RETRY(close(pipefd[0]));
1053
TEMP_FAILURE_RETRY(close(pipefd[1]));
1054
exitstatus = EX_OSERR;
1055
free(direntries[i]);
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
1056
899
goto fallback;
1057
900
}
1058
901
if(pid == 0){
1059
902
/* this is the child process */
1060
903
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1061
904
if(ret < 0){
1062
error(0, errno, "sigaction");
1063
_exit(EX_OSERR);
905
perror("sigaction");
906
_exit(EXIT_FAILURE);
1064
907
}
1065
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1066
909
if(ret < 0){
1067
error(0, errno, "sigprocmask");
1068
_exit(EX_OSERR);
910
perror("sigprocmask");
911
_exit(EXIT_FAILURE);
1069
912
}
1070
913
1071
914
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1072
915
if(ret == -1){
1073
error(0, errno, "dup2");
1074
_exit(EX_OSERR);
916
perror("dup2");
917
_exit(EXIT_FAILURE);
1075
918
}
1076
919
1077
if(fexecve(plugin_fd, p->argv,
1078
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1079
error(0, errno, "fexecve for %s/%s",
1080
plugindir != NULL ? plugindir : PDIR,
1081
direntries[i]->d_name);
1082
_exit(EX_OSERR);
920
if(dirfd(dir) < 0){
921
/* If dir has no file descriptor, we could not set FD_CLOEXEC
922
above and must now close it manually here. */
923
closedir(dir);
924
}
925
if(p->environ[0] == NULL){
926
if(execv(filename, p->argv) < 0){
927
perror("execv");
928
_exit(EXIT_FAILURE);
929
}
930
} else {
931
if(execve(filename, p->argv, p->environ) < 0){
932
perror("execve");
933
_exit(EXIT_FAILURE);
934
}
1083
935
}
1084
936
/* no return */
1085
937
}
1086
938
/* Parent process */
1087
939
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1088
940
pipe */
1089
TEMP_FAILURE_RETRY(close(plugin_fd));
1090
plugin *new_plugin = getplugin(direntries[i]->d_name);
941
free(filename);
942
plugin *new_plugin = getplugin(dirst->d_name);
1091
943
if(new_plugin == NULL){
1092
error(0, errno, "getplugin");
1093
ret = (int)(TEMP_FAILURE_RETRY
1094
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1095
NULL)));
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
1096
948
if(ret < 0){
1097
error(0, errno, "sigprocmask");
949
perror("sigprocmask");
1098
950
}
1099
exitstatus = EX_OSERR;
1100
free(direntries[i]);
951
exitstatus = EXIT_FAILURE;
1101
952
goto fallback;
1102
953
}
1103
free(direntries[i]);
1104
954
1105
955
new_plugin->pid = pid;
1106
956
new_plugin->fd = pipefd[0];
1107
957
1108
958
/* Unblock SIGCHLD so signal handler can be run if this process
1109
959
has already completed */
1110
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1111
&sigchld_action.sa_mask,
1112
NULL));
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
1113
963
if(ret < 0){
1114
error(0, errno, "sigprocmask");
1115
exitstatus = EX_OSERR;
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
1116
966
goto fallback;
1117
967
}
1118
968
1119
#if defined (__GNUC__) and defined (__GLIBC__)
1120
#if not __GLIBC_PREREQ(2, 16)
1121
#pragma GCC diagnostic push
1122
#pragma GCC diagnostic ignored "-Wsign-conversion"
1123
#endif
1124
#endif
1125
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1126
-Wconversion in GNU libc
1127
before 2.16 */
1128
#if defined (__GNUC__) and defined (__GLIBC__)
1129
#if not __GLIBC_PREREQ(2, 16)
1130
#pragma GCC diagnostic pop
1131
#endif
1132
#endif
969
FD_SET(new_plugin->fd, &rfds_all);
1133
970
1134
971
if(maxfd < new_plugin->fd){
1135
972
maxfd = new_plugin->fd;
1136
973
}
1137
974
}
1138
975
1139
free(direntries);
1140
direntries = NULL;
1141
TEMP_FAILURE_RETRY(close(dir_fd));
1142
dir_fd = -1;
976
TEMP_FAILURE_RETRY(closedir(dir));
977
dir = NULL;
1143
978
free_plugin(getplugin(NULL));
1144
979
1145
980
for(plugin *p = plugin_list; p != NULL; p = p->next){
1158
993
fd_set rfds = rfds_all;
1159
994
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1160
995
if(select_ret == -1 and errno != EINTR){
1161
error(0, errno, "select");
1162
exitstatus = EX_OSERR;
996
perror("select");
997
exitstatus = EXIT_FAILURE;
1163
998
goto fallback;
1164
999
}
1165
1000
/* OK, now either a process completed, or something can be read
1191
1026
}
1192
1027
1193
1028
/* Remove the plugin */
1194
#if defined (__GNUC__) and defined (__GLIBC__)
1195
#if not __GLIBC_PREREQ(2, 16)
1196
#pragma GCC diagnostic push
1197
#pragma GCC diagnostic ignored "-Wsign-conversion"
1198
#endif
1199
#endif
1200
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1201
-Wconversion in GNU libc
1202
before 2.16 */
1203
#if defined (__GNUC__) and defined (__GLIBC__)
1204
#if not __GLIBC_PREREQ(2, 16)
1205
#pragma GCC diagnostic pop
1206
#endif
1207
#endif
1029
FD_CLR(proc->fd, &rfds_all);
1208
1030
1209
1031
/* Block signal while modifying process_list */
1210
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1211
(SIG_BLOCK,
1212
&sigchld_action.sa_mask,
1213
NULL));
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
1214
1035
if(ret < 0){
1215
error(0, errno, "sigprocmask");
1216
exitstatus = EX_OSERR;
1036
perror("sigprocmask");
1037
exitstatus = EXIT_FAILURE;
1217
1038
goto fallback;
1218
1039
}
1219
1040
1222
1043
proc = next_plugin;
1223
1044
1224
1045
/* We are done modifying process list, so unblock signal */
1225
ret = (int)(TEMP_FAILURE_RETRY
1226
(sigprocmask(SIG_UNBLOCK,
1227
&sigchld_action.sa_mask, NULL)));
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
1228
1049
if(ret < 0){
1229
error(0, errno, "sigprocmask");
1230
exitstatus = EX_OSERR;
1050
perror("sigprocmask");
1051
exitstatus = EXIT_FAILURE;
1231
1052
goto fallback;
1232
1053
}
1233
1054
1243
1064
bool bret = print_out_password(proc->buffer,
1244
1065
proc->buffer_length);
1245
1066
if(not bret){
1246
error(0, errno, "print_out_password");
1247
exitstatus = EX_IOERR;
1067
perror("print_out_password");
1068
exitstatus = EXIT_FAILURE;
1248
1069
}
1249
1070
goto fallback;
1250
1071
}
1251
1072
1252
1073
/* This process has not completed. Does it have any output? */
1253
#if defined (__GNUC__) and defined (__GLIBC__)
1254
#if not __GLIBC_PREREQ(2, 16)
1255
#pragma GCC diagnostic push
1256
#pragma GCC diagnostic ignored "-Wsign-conversion"
1257
#endif
1258
#endif
1259
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1260
warning from
1261
-Wconversion
1262
in GNU libc
1263
before
1264
2.16 */
1265
#if defined (__GNUC__) and defined (__GLIBC__)
1266
#if not __GLIBC_PREREQ(2, 16)
1267
#pragma GCC diagnostic pop
1268
#endif
1269
#endif
1074
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1270
1075
/* This process had nothing to say at this time */
1271
1076
proc = proc->next;
1272
1077
continue;
1273
1078
}
1274
1079
/* Before reading, make the process' data buffer large enough */
1275
1080
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1276
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1277
+ (size_t) BUFFER_SIZE);
1278
if(new_buffer == NULL){
1279
error(0, errno, "malloc");
1280
exitstatus = EX_OSERR;
1081
proc->buffer = realloc(proc->buffer, proc->buffer_size
1082
+ (size_t) BUFFER_SIZE);
1083
if(proc->buffer == NULL){
1084
perror("malloc");
1085
exitstatus = EXIT_FAILURE;
1281
1086
goto fallback;
1282
1087
}
1283
proc->buffer = new_buffer;
1284
1088
proc->buffer_size += BUFFER_SIZE;
1285
1089
}
1286
1090
/* Read from the process */
1305
1109
1306
1110
fallback:
1307
1111
1308
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1309
and exitstatus != EX_OK)){
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1310
1113
/* Fallback if all plugins failed, none are found or an error
1311
1114
occured */
1312
1115
bool bret;
1320
1123
}
1321
1124
bret = print_out_password(passwordbuffer, len);
1322
1125
if(not bret){
1323
error(0, errno, "print_out_password");
1324
exitstatus = EX_IOERR;
1126
perror("print_out_password");
1127
exitstatus = EXIT_FAILURE;
1325
1128
}
1326
1129
}
1327
1130
1328
1131
/* Restore old signal handler */
1329
1132
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1330
1133
if(ret == -1){
1331
error(0, errno, "sigaction");
1332
exitstatus = EX_OSERR;
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1333
1136
}
1334
1137
1335
1138
if(custom_argv != NULL){
1339
1142
free(custom_argv);
1340
1143
}
1341
1144
1342
free(direntries);
1343
1344
if(dir_fd != -1){
1345
TEMP_FAILURE_RETRY(close(dir_fd));
1145
if(dir != NULL){
1146
closedir(dir);
1346
1147
}
1347
1148
1348
1149
/* Kill the processes */
1352
1153
ret = kill(p->pid, SIGTERM);
1353
1154
if(ret == -1 and errno != ESRCH){
1354
1155
/* Set-uid proccesses might not get closed */
1355
error(0, errno, "kill");
1156
perror("kill");
1356
1157
}
1357
1158
}
1358
1159
}
1359
1160
1360
1161
/* Wait for any remaining child processes to terminate */
1361
do {
1162
do{
1362
1163
ret = wait(NULL);
1363
1164
} while(ret >= 0);
1364
1165
if(errno != ECHILD){
1365
error(0, errno, "wait");
1166
perror("wait");
1366
1167
}
1367
1168
1368
1169
free_plugin_list();
1369
1170
1370
1171
free(plugindir);
1371
free(pluginhelperdir);
1372
1172
free(argfile);
1373
1173
1374
1174
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0