To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 24.1.136
- compare with another revision
- download diff
- download tarball
- view history from revision 24.1.136
- Committer: Björn Påhlsson
- Date: 2009-02-09 19:34:28 UTC
- mfrom: (237.2.72 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: belorn@braxen-20090209193428-2u3js3m87ckb84kc
merge
- files added:
- initramfs-tools-hook-conf
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
19
17
*
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
22
21
*
23
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
24
23
*/
25
24
26
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
O_CLOEXEC, pipe2() */
26
asprintf() */
28
27
#include <stddef.h> /* size_t, NULL */
29
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
30
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
31
30
#include <stdbool.h> /* bool, true, false */
32
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
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() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
43
#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
*/
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
readdir(), closedir(), dirfd() */
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
47
fcntl(), setuid(), setgid(),
48
F_GETFD, F_SETFD, FD_CLOEXEC,
49
access(), pipe(), fork(), close()
50
dup2(), STDOUT_FILENO, _exit(),
51
execv(), write(), read(),
52
close() */
52
53
#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() */
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
57
56
#include <errno.h> /* errno */
58
57
#include <argp.h> /* struct argp_option, struct
59
58
argp_state, struct argp,
66
65
SIG_UNBLOCK, kill(), sig_atomic_t
67
66
*/
68
67
#include <errno.h> /* errno, EBADF */
69
#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() */
68
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
75
69
76
70
#define BUFFER_SIZE 256
77
71
78
72
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
73
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
74
82
75
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
77
85
78
typedef struct plugin{
86
79
char *name; /* can be NULL or any plugin name */
89
82
char **environ;
90
83
int envc;
91
84
bool disabled;
92
85
93
86
/* Variables used for running processes*/
94
87
pid_t pid;
95
88
int fd;
106
99
107
100
/* Gets an existing plugin based on name,
108
101
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
102
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
103
/* Check for exiting plugin with that name */
112
104
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
105
if((p->name == name)
114
106
or (p->name and name and (strcmp(p->name, name) == 0))){
116
108
}
117
109
}
118
110
/* Create a new plugin */
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
111
plugin *new_plugin = malloc(sizeof(plugin));
123
112
if(new_plugin == NULL){
124
113
return NULL;
125
114
}
126
115
char *copy_name = NULL;
127
116
if(name != NULL){
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
117
copy_name = strdup(name);
131
118
if(copy_name == NULL){
132
int e = errno;
133
119
free(new_plugin);
134
errno = e;
135
120
return NULL;
136
121
}
137
122
}
141
126
.disabled = false,
142
127
.next = plugin_list };
143
128
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
129
new_plugin->argv = malloc(sizeof(char *) * 2);
147
130
if(new_plugin->argv == NULL){
148
int e = errno;
149
131
free(copy_name);
150
132
free(new_plugin);
151
errno = e;
152
133
return NULL;
153
134
}
154
135
new_plugin->argv[0] = copy_name;
155
136
new_plugin->argv[1] = NULL;
156
137
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
138
new_plugin->environ = malloc(sizeof(char *));
160
139
if(new_plugin->environ == NULL){
161
int e = errno;
162
140
free(copy_name);
163
141
free(new_plugin->argv);
164
142
free(new_plugin);
165
errno = e;
166
143
return NULL;
167
144
}
168
145
new_plugin->environ[0] = NULL;
173
150
}
174
151
175
152
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
153
static bool add_to_char_array(const char *new, char ***array,
178
154
int *len){
179
155
/* 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);
156
*array = realloc(*array, sizeof(char *)
157
* (size_t) ((*len) + 2));
185
158
/* Malloc check */
186
if(new_array == NULL){
159
if(*array == NULL){
187
160
return false;
188
161
}
189
*array = new_array;
190
162
/* Make a copy of the new string */
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
163
char *copy = strdup(new);
195
164
if(copy == NULL){
196
165
return false;
197
166
}
204
173
}
205
174
206
175
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
208
176
static bool add_argument(plugin *p, const char *arg){
209
177
if(p == NULL){
210
178
return false;
213
181
}
214
182
215
183
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
217
184
static bool add_environment(plugin *p, const char *def, bool replace){
218
185
if(p == NULL){
219
186
return false;
221
188
/* namelen = length of name of environment variable */
222
189
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
190
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
191
for(char **e = p->environ; *e != NULL; e++){
192
if(strncmp(*e, def, namelen + 1) == 0){
226
193
/* It already exists */
227
194
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){
195
char *new = realloc(*e, strlen(def) + 1);
196
if(new == NULL){
233
197
return false;
234
198
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
199
*e = new;
200
strcpy(*e, def);
237
201
}
238
202
return true;
239
203
}
241
205
return add_to_char_array(def, &(p->environ), &(p->envc));
242
206
}
243
207
244
#ifndef O_CLOEXEC
245
208
/*
246
209
* Based on the example in the GNU LibC manual chapter 13.13 "File
247
210
* Descriptor Flags".
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
* *Note File Descriptor Flags:(libc)Descriptor Flags.
249
212
*/
250
__attribute__((warn_unused_result))
251
213
static int set_cloexec_flag(int fd){
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
int ret = fcntl(fd, F_GETFD, 0);
253
215
/* If reading the flags failed, return error indication now. */
254
216
if(ret < 0){
255
217
return ret;
256
218
}
257
219
/* Store modified flag word in the descriptor. */
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
220
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
260
221
}
261
#endif /* not O_CLOEXEC */
262
222
263
223
264
224
/* Mark processes as completed when they exit, and save their exit
278
238
/* No child processes */
279
239
break;
280
240
}
281
error(0, errno, "waitpid");
241
perror("waitpid");
282
242
}
283
243
284
244
/* A child exited, find it in process_list */
296
256
}
297
257
298
258
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
300
259
static bool print_out_password(const char *buffer, size_t length){
301
260
ssize_t ret;
302
261
for(size_t written = 0; written < length; written += (size_t)ret){
310
269
}
311
270
312
271
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
314
272
static void free_plugin(plugin *plugin_node){
315
273
316
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
322
280
}
323
281
free(plugin_node->environ);
324
282
free(plugin_node->buffer);
325
283
326
284
/* Removes the plugin from the singly-linked list */
327
285
if(plugin_node == plugin_list){
328
286
/* First one - simple */
348
306
349
307
int main(int argc, char *argv[]){
350
308
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
352
309
char *argfile = NULL;
353
310
FILE *conffp;
354
struct dirent **direntries = NULL;
311
size_t d_name_len;
312
DIR *dir = NULL;
313
struct dirent *dirst;
355
314
struct stat st;
356
315
fd_set rfds_all;
357
int ret, maxfd = 0;
316
int ret, numchars, maxfd = 0;
358
317
ssize_t sret;
318
intmax_t tmpmax;
359
319
uid_t uid = 65534;
360
320
gid_t gid = 65534;
361
321
bool debug = false;
365
325
.sa_flags = SA_NOCLDSTOP };
366
326
char **custom_argv = NULL;
367
327
int custom_argc = 0;
368
int dir_fd = -1;
369
328
370
329
/* Establish a signal handler */
371
330
sigemptyset(&sigchld_action.sa_mask);
372
331
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
373
332
if(ret == -1){
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
333
perror("sigaddset");
334
exitstatus = EXIT_FAILURE;
376
335
goto fallback;
377
336
}
378
337
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
379
338
if(ret == -1){
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
339
perror("sigaction");
340
exitstatus = EXIT_FAILURE;
382
341
goto fallback;
383
342
}
384
343
416
375
.doc = "Group ID the plugins will run as", .group = 3 },
417
376
{ .name = "debug", .key = 132,
418
377
.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
378
{ .name = NULL }
433
379
};
434
380
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
438
383
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
441
384
case 'g': /* --global-options */
442
{
385
if(arg != NULL){
443
386
char *plugin_option;
444
387
while((plugin_option = strsep(&arg, ",")) != NULL){
388
if(plugin_option[0] == '\0'){
389
continue;
390
}
445
391
if(not add_argument(getplugin(NULL), plugin_option)){
446
break;
392
perror("add_argument");
393
return ARGP_ERR_UNKNOWN;
447
394
}
448
395
}
449
errno = 0;
450
396
}
451
397
break;
452
398
case 'G': /* --global-env */
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
399
if(arg == NULL){
400
break;
401
}
402
if(not add_environment(getplugin(NULL), arg, true)){
403
perror("add_environment");
455
404
}
456
405
break;
457
406
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;
407
if(arg != NULL){
408
char *plugin_name = strsep(&arg, ":");
409
if(plugin_name[0] == '\0'){
410
break;
411
}
412
char *plugin_option;
413
while((plugin_option = strsep(&arg, ",")) != NULL){
414
if(not add_argument(getplugin(plugin_name), plugin_option)){
415
perror("add_argument");
416
return ARGP_ERR_UNKNOWN;
476
417
}
477
418
}
478
errno = 0;
479
419
}
480
420
break;
481
421
case 'E': /* --env-for */
422
if(arg == NULL){
423
break;
424
}
482
425
{
483
426
char *envdef = strchr(arg, ':');
484
427
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
487
428
break;
488
429
}
489
430
*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;
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
498
433
}
499
434
}
500
435
break;
501
436
case 'd': /* --disable */
502
{
437
if(arg != NULL){
503
438
plugin *p = getplugin(arg);
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
439
if(p == NULL){
440
return ARGP_ERR_UNKNOWN;
507
441
}
442
p->disabled = true;
508
443
}
509
444
break;
510
445
case 'e': /* --enable */
511
{
446
if(arg != NULL){
512
447
plugin *p = getplugin(arg);
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
448
if(p == NULL){
449
return ARGP_ERR_UNKNOWN;
516
450
}
451
p->disabled = false;
517
452
}
518
453
break;
519
454
case 128: /* --plugin-dir */
520
455
free(plugindir);
521
456
plugindir = strdup(arg);
522
if(plugindir != NULL){
523
errno = 0;
524
}
457
if(plugindir == NULL){
458
perror("strdup");
459
}
525
460
break;
526
461
case 129: /* --config-file */
527
462
/* This is already done by parse_opt_config_file() */
528
463
break;
529
464
case 130: /* --userid */
530
tmp_id = strtoimax(arg, &tmp, 10);
531
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;
465
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
466
if(ret < 1 or tmpmax != (uid_t)tmpmax
467
or arg[numchars] != '\0'){
468
fprintf(stderr, "Bad user ID number: \"%s\", using %"
469
PRIdMAX "\n", arg, (intmax_t)uid);
470
} else {
471
uid = (uid_t)tmpmax;
536
472
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
539
473
break;
540
474
case 131: /* --groupid */
541
tmp_id = strtoimax(arg, &tmp, 10);
542
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;
475
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
476
if(ret < 1 or tmpmax != (gid_t)tmpmax
477
or arg[numchars] != '\0'){
478
fprintf(stderr, "Bad group ID number: \"%s\", using %"
479
PRIdMAX "\n", arg, (intmax_t)gid);
480
} else {
481
gid = (gid_t)tmpmax;
547
482
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
550
483
break;
551
484
case 132: /* --debug */
552
485
debug = true;
553
486
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
487
/*
576
488
* When adding more options before this line, remember to also add a
577
489
* "case" to the "parse_opt_config_file" function below.
580
492
/* Cryptsetup always passes an argument, which is an empty
581
493
string if "none" was specified in /etc/crypttab. So if
582
494
argument was empty, we ignore it silently. */
583
if(arg[0] == '\0'){
584
break;
495
if(arg[0] != '\0'){
496
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
585
497
}
586
/* FALLTHROUGH */
498
break;
499
case ARGP_KEY_END:
500
break;
587
501
default:
588
502
return ARGP_ERR_UNKNOWN;
589
503
}
590
return errno; /* Set to 0 at start */
504
return 0;
591
505
}
592
506
593
507
/* This option parser is the same as parse_opt() above, except it
595
509
error_t parse_opt_config_file(int key, char *arg,
596
510
__attribute__((unused))
597
511
struct argp_state *state){
598
errno = 0;
599
512
switch(key){
600
513
case 'g': /* --global-options */
601
514
case 'G': /* --global-env */
608
521
case 129: /* --config-file */
609
522
free(argfile);
610
523
argfile = strdup(arg);
611
if(argfile != NULL){
612
errno = 0;
524
if(argfile == NULL){
525
perror("strdup");
613
526
}
614
break;
527
break;
615
528
case 130: /* --userid */
616
529
case 131: /* --groupid */
617
530
case 132: /* --debug */
618
case 133: /* --plugin-helper-dir */
619
case '?': /* --help */
620
case -3: /* --usage */
621
case 'V': /* --version */
622
531
case ARGP_KEY_ARG:
532
case ARGP_KEY_END:
623
533
break;
624
534
default:
625
535
return ARGP_ERR_UNKNOWN;
626
536
}
627
return errno;
537
return 0;
628
538
}
629
539
630
540
struct argp argp = { .options = options,
634
544
635
545
/* Parse using parse_opt_config_file() in order to get the custom
636
546
config file location, if any. */
637
ret = argp_parse(&argp, argc, argv,
638
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
639
NULL, NULL);
640
switch(ret){
641
case 0:
642
break;
643
case ENOMEM:
644
default:
645
errno = ret;
646
error(0, errno, "argp_parse");
647
exitstatus = EX_OSERR;
648
goto fallback;
649
case EINVAL:
650
exitstatus = EX_USAGE;
547
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
548
if(ret == ARGP_ERR_UNKNOWN){
549
fprintf(stderr, "Unknown error while parsing arguments\n");
550
exitstatus = EXIT_FAILURE;
651
551
goto fallback;
652
552
}
653
553
659
559
conffp = fopen(AFILE, "r");
660
560
} else {
661
561
conffp = fopen(argfile, "r");
662
}
562
}
663
563
if(conffp != NULL){
664
564
char *org_line = NULL;
665
565
char *p, *arg, *new_arg, *line;
666
566
size_t size = 0;
667
567
const char whitespace_delims[] = " \r\t\f\v\n";
668
568
const char comment_delim[] = "#";
669
569
670
570
custom_argc = 1;
671
571
custom_argv = malloc(sizeof(char*) * 2);
672
572
if(custom_argv == NULL){
673
error(0, errno, "malloc");
674
exitstatus = EX_OSERR;
573
perror("malloc");
574
exitstatus = EXIT_FAILURE;
675
575
goto fallback;
676
576
}
677
577
custom_argv[0] = argv[0];
678
578
custom_argv[1] = NULL;
679
579
680
580
/* for each line in the config file, strip whitespace and ignore
681
581
commented text */
682
582
while(true){
684
584
if(sret == -1){
685
585
break;
686
586
}
687
587
688
588
line = org_line;
689
589
arg = strsep(&line, comment_delim);
690
590
while((p = strsep(&arg, whitespace_delims)) != NULL){
693
593
}
694
594
new_arg = strdup(p);
695
595
if(new_arg == NULL){
696
error(0, errno, "strdup");
697
exitstatus = EX_OSERR;
596
perror("strdup");
597
exitstatus = EXIT_FAILURE;
698
598
free(org_line);
699
599
goto fallback;
700
600
}
701
601
702
602
custom_argc += 1;
703
{
704
char **new_argv = realloc(custom_argv, sizeof(char *)
705
* ((size_t)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
}
603
custom_argv = realloc(custom_argv, sizeof(char *)
604
* ((unsigned int) custom_argc + 1));
605
if(custom_argv == NULL){
606
perror("realloc");
607
exitstatus = EXIT_FAILURE;
608
free(org_line);
609
goto fallback;
715
610
}
716
611
custom_argv[custom_argc-1] = new_arg;
717
custom_argv[custom_argc] = NULL;
612
custom_argv[custom_argc] = NULL;
718
613
}
719
614
}
720
do {
721
ret = fclose(conffp);
722
} while(ret == EOF and errno == EINTR);
723
if(ret == EOF){
724
error(0, errno, "fclose");
725
exitstatus = EX_IOERR;
726
goto fallback;
727
}
728
615
free(org_line);
729
616
} else {
730
617
/* Check for harmful errors and go to fallback. Other errors might
731
618
not affect opening plugins */
732
619
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
620
perror("fopen");
621
exitstatus = EXIT_FAILURE;
735
622
goto fallback;
736
623
}
737
624
}
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
625
/* If there was any arguments from configuration file,
626
pass them to parser as command arguments */
740
627
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;
628
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
629
0, NULL);
630
if(ret == ARGP_ERR_UNKNOWN){
631
fprintf(stderr, "Unknown error while parsing arguments\n");
632
exitstatus = EXIT_FAILURE;
755
633
goto fallback;
756
634
}
757
635
}
758
636
759
637
/* Parse actual command line arguments, to let them override the
760
638
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
}
639
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
640
if(ret == ARGP_ERR_UNKNOWN){
641
fprintf(stderr, "Unknown error while parsing arguments\n");
642
exitstatus = EXIT_FAILURE;
643
goto fallback;
794
644
}
795
645
796
646
if(debug){
797
for(plugin *p = plugin_list; p != NULL; p = p->next){
647
for(plugin *p = plugin_list; p != NULL; p=p->next){
798
648
fprintf(stderr, "Plugin: %s has %d arguments\n",
799
649
p->name ? p->name : "Global", p->argc - 1);
800
650
for(char **a = p->argv; *a != NULL; a++){
807
657
}
808
658
}
809
659
810
if(getuid() == 0){
811
/* Work around Debian bug #633582:
812
<https://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
close(plugindir_fd);
831
}
832
}
833
834
/* Lower permissions */
835
ret = setgid(gid);
660
/* Strip permissions down to nobody */
661
setgid(gid);
836
662
if(ret == -1){
837
error(0, errno, "setgid");
663
perror("setgid");
838
664
}
839
665
ret = setuid(uid);
840
666
if(ret == -1){
841
error(0, errno, "setuid");
842
}
843
844
/* Open plugin directory with close_on_exec flag */
667
perror("setuid");
668
}
669
670
if(plugindir == NULL){
671
dir = opendir(PDIR);
672
} else {
673
dir = opendir(plugindir);
674
}
675
676
if(dir == NULL){
677
perror("Could not open plugin dir");
678
exitstatus = EXIT_FAILURE;
679
goto fallback;
680
}
681
682
/* Set the FD_CLOEXEC flag on the directory, if possible */
845
683
{
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;
684
int dir_fd = dirfd(dir);
685
if(dir_fd >= 0){
686
ret = set_cloexec_flag(dir_fd);
687
if(ret < 0){
688
perror("set_cloexec_flag");
689
exitstatus = EXIT_FAILURE;
690
goto fallback;
890
691
}
891
692
}
892
return 1;
893
}
894
895
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
896
alphasort);
897
if(numplugins == -1){
898
error(0, errno, "Could not scan plugin dir");
899
direntries = NULL;
900
exitstatus = EX_OSERR;
901
goto fallback;
902
693
}
903
694
904
695
FD_ZERO(&rfds_all);
905
696
906
697
/* Read and execute any executable in the plugin directory*/
907
for(int i = 0; i < numplugins; i++){
908
909
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
910
if(plugin_fd == -1){
911
error(0, errno, "Could not open plugin");
912
free(direntries[i]);
698
while(true){
699
dirst = readdir(dir);
700
701
/* All directory entries have been processed */
702
if(dirst == NULL){
703
if(errno == EBADF){
704
perror("readdir");
705
exitstatus = EXIT_FAILURE;
706
goto fallback;
707
}
708
break;
709
}
710
711
d_name_len = strlen(dirst->d_name);
712
713
/* Ignore dotfiles, backup files and other junk */
714
{
715
bool bad_name = false;
716
717
const char const *bad_prefixes[] = { ".", "#", NULL };
718
719
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
720
".dpkg-old",
721
".dpkg-bak",
722
".dpkg-divert", NULL };
723
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
724
size_t pre_len = strlen(*pre);
725
if((d_name_len >= pre_len)
726
and strncmp((dirst->d_name), *pre, pre_len) == 0){
727
if(debug){
728
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
729
" with bad prefix %s\n", dirst->d_name, *pre);
730
}
731
bad_name = true;
732
break;
733
}
734
}
735
if(bad_name){
736
continue;
737
}
738
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
739
size_t suf_len = strlen(*suf);
740
if((d_name_len >= suf_len)
741
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
742
== 0)){
743
if(debug){
744
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
745
" with bad suffix %s\n", dirst->d_name, *suf);
746
}
747
bad_name = true;
748
break;
749
}
750
}
751
752
if(bad_name){
753
continue;
754
}
755
}
756
757
char *filename;
758
if(plugindir == NULL){
759
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
760
} else {
761
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
762
}
763
if(ret < 0){
764
perror("asprintf");
913
765
continue;
914
766
}
915
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
767
768
ret = stat(filename, &st);
916
769
if(ret == -1){
917
error(0, errno, "stat");
918
close(plugin_fd);
919
free(direntries[i]);
770
perror("stat");
771
free(filename);
920
772
continue;
921
773
}
922
774
923
775
/* Ignore non-executable files */
924
if(not S_ISREG(st.st_mode)
925
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
926
X_OK, 0)) != 0)){
776
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
927
777
if(debug){
928
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
929
" with bad type or mode\n",
930
plugindir != NULL ? plugindir : PDIR,
931
direntries[i]->d_name);
778
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
779
" with bad type or mode\n", filename);
932
780
}
933
close(plugin_fd);
934
free(direntries[i]);
781
free(filename);
935
782
continue;
936
783
}
937
784
938
plugin *p = getplugin(direntries[i]->d_name);
785
plugin *p = getplugin(dirst->d_name);
939
786
if(p == NULL){
940
error(0, errno, "getplugin");
941
close(plugin_fd);
942
free(direntries[i]);
787
perror("getplugin");
788
free(filename);
943
789
continue;
944
790
}
945
791
if(p->disabled){
946
792
if(debug){
947
793
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
948
direntries[i]->d_name);
794
dirst->d_name);
949
795
}
950
close(plugin_fd);
951
free(direntries[i]);
796
free(filename);
952
797
continue;
953
798
}
954
799
{
957
802
if(g != NULL){
958
803
for(char **a = g->argv + 1; *a != NULL; a++){
959
804
if(not add_argument(p, *a)){
960
error(0, errno, "add_argument");
805
perror("add_argument");
961
806
}
962
807
}
963
808
/* Add global environment variables */
964
809
for(char **e = g->environ; *e != NULL; e++){
965
810
if(not add_environment(p, *e, false)){
966
error(0, errno, "add_environment");
811
perror("add_environment");
967
812
}
968
813
}
969
814
}
970
815
}
971
/* If this plugin has any environment variables, we need to
972
duplicate the environment from this process, too. */
816
/* If this plugin has any environment variables, we will call
817
using execve and need to duplicate the environment from this
818
process, too. */
973
819
if(p->environ[0] != NULL){
974
820
for(char **e = environ; *e != NULL; e++){
975
821
if(not add_environment(p, *e, false)){
976
error(0, errno, "add_environment");
822
perror("add_environment");
977
823
}
978
824
}
979
825
}
980
826
981
827
int pipefd[2];
982
#ifndef O_CLOEXEC
983
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
984
#else /* O_CLOEXEC */
985
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
986
#endif /* O_CLOEXEC */
828
ret = pipe(pipefd);
987
829
if(ret == -1){
988
error(0, errno, "pipe");
989
exitstatus = EX_OSERR;
990
free(direntries[i]);
991
goto fallback;
992
}
993
if(pipefd[0] >= FD_SETSIZE){
994
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
995
FD_SETSIZE);
996
close(pipefd[0]);
997
close(pipefd[1]);
998
exitstatus = EX_OSERR;
999
free(direntries[i]);
1000
goto fallback;
1001
}
1002
#ifndef O_CLOEXEC
830
perror("pipe");
831
exitstatus = EXIT_FAILURE;
832
goto fallback;
833
}
1003
834
/* Ask OS to automatic close the pipe on exec */
1004
835
ret = set_cloexec_flag(pipefd[0]);
1005
836
if(ret < 0){
1006
error(0, errno, "set_cloexec_flag");
1007
close(pipefd[0]);
1008
close(pipefd[1]);
1009
exitstatus = EX_OSERR;
1010
free(direntries[i]);
837
perror("set_cloexec_flag");
838
exitstatus = EXIT_FAILURE;
1011
839
goto fallback;
1012
840
}
1013
841
ret = set_cloexec_flag(pipefd[1]);
1014
842
if(ret < 0){
1015
error(0, errno, "set_cloexec_flag");
1016
close(pipefd[0]);
1017
close(pipefd[1]);
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
843
perror("set_cloexec_flag");
844
exitstatus = EXIT_FAILURE;
1020
845
goto fallback;
1021
846
}
1022
#endif /* not O_CLOEXEC */
1023
847
/* Block SIGCHLD until process is safely in process list */
1024
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1025
&sigchld_action.sa_mask,
1026
NULL));
848
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1027
849
if(ret < 0){
1028
error(0, errno, "sigprocmask");
1029
exitstatus = EX_OSERR;
1030
free(direntries[i]);
850
perror("sigprocmask");
851
exitstatus = EXIT_FAILURE;
1031
852
goto fallback;
1032
853
}
1033
854
/* Starting a new process to be watched */
1034
pid_t pid;
1035
do {
1036
pid = fork();
1037
} while(pid == -1 and errno == EINTR);
855
pid_t pid = fork();
1038
856
if(pid == -1){
1039
error(0, errno, "fork");
1040
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1041
&sigchld_action.sa_mask, NULL));
1042
close(pipefd[0]);
1043
close(pipefd[1]);
1044
exitstatus = EX_OSERR;
1045
free(direntries[i]);
857
perror("fork");
858
exitstatus = EXIT_FAILURE;
1046
859
goto fallback;
1047
860
}
1048
861
if(pid == 0){
1049
862
/* this is the child process */
1050
863
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1051
864
if(ret < 0){
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
865
perror("sigaction");
866
_exit(EXIT_FAILURE);
1054
867
}
1055
868
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1056
869
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
870
perror("sigprocmask");
871
_exit(EXIT_FAILURE);
1059
872
}
1060
873
1061
874
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1062
875
if(ret == -1){
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
876
perror("dup2");
877
_exit(EXIT_FAILURE);
1065
878
}
1066
879
1067
if(fexecve(plugin_fd, p->argv,
1068
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1069
error(0, errno, "fexecve for %s/%s",
1070
plugindir != NULL ? plugindir : PDIR,
1071
direntries[i]->d_name);
1072
_exit(EX_OSERR);
880
if(dirfd(dir) < 0){
881
/* If dir has no file descriptor, we could not set FD_CLOEXEC
882
above and must now close it manually here. */
883
closedir(dir);
884
}
885
if(p->environ[0] == NULL){
886
if(execv(filename, p->argv) < 0){
887
perror("execv");
888
_exit(EXIT_FAILURE);
889
}
890
} else {
891
if(execve(filename, p->argv, p->environ) < 0){
892
perror("execve");
893
_exit(EXIT_FAILURE);
894
}
1073
895
}
1074
896
/* no return */
1075
897
}
1076
898
/* Parent process */
1077
899
close(pipefd[1]); /* Close unused write end of pipe */
1078
close(plugin_fd);
1079
plugin *new_plugin = getplugin(direntries[i]->d_name);
900
free(filename);
901
plugin *new_plugin = getplugin(dirst->d_name);
1080
902
if(new_plugin == NULL){
1081
error(0, errno, "getplugin");
1082
ret = (int)(TEMP_FAILURE_RETRY
1083
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1084
NULL)));
903
perror("getplugin");
904
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1085
905
if(ret < 0){
1086
error(0, errno, "sigprocmask");
906
perror("sigprocmask");
1087
907
}
1088
exitstatus = EX_OSERR;
1089
free(direntries[i]);
908
exitstatus = EXIT_FAILURE;
1090
909
goto fallback;
1091
910
}
1092
free(direntries[i]);
1093
911
1094
912
new_plugin->pid = pid;
1095
913
new_plugin->fd = pipefd[0];
1096
1097
if(debug){
1098
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1099
new_plugin->name, (intmax_t) (new_plugin->pid));
1100
}
1101
914
1102
915
/* Unblock SIGCHLD so signal handler can be run if this process
1103
916
has already completed */
1104
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1105
&sigchld_action.sa_mask,
1106
NULL));
917
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1107
918
if(ret < 0){
1108
error(0, errno, "sigprocmask");
1109
exitstatus = EX_OSERR;
919
perror("sigprocmask");
920
exitstatus = EXIT_FAILURE;
1110
921
goto fallback;
1111
922
}
1112
923
1117
928
}
1118
929
}
1119
930
1120
free(direntries);
1121
direntries = NULL;
1122
close(dir_fd);
1123
dir_fd = -1;
931
closedir(dir);
932
dir = NULL;
1124
933
free_plugin(getplugin(NULL));
1125
934
1126
935
for(plugin *p = plugin_list; p != NULL; p = p->next){
1138
947
while(plugin_list){
1139
948
fd_set rfds = rfds_all;
1140
949
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1141
if(select_ret == -1 and errno != EINTR){
1142
error(0, errno, "select");
1143
exitstatus = EX_OSERR;
950
if(select_ret == -1){
951
perror("select");
952
exitstatus = EXIT_FAILURE;
1144
953
goto fallback;
1145
954
}
1146
955
/* OK, now either a process completed, or something can be read
1152
961
if(not WIFEXITED(proc->status)
1153
962
or WEXITSTATUS(proc->status) != 0){
1154
963
/* Bad exit by plugin */
1155
964
1156
965
if(debug){
1157
966
if(WIFEXITED(proc->status)){
1158
967
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1161
970
WEXITSTATUS(proc->status));
1162
971
} else if(WIFSIGNALED(proc->status)){
1163
972
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1164
" signal %d: %s\n", proc->name,
973
" signal %d\n", proc->name,
1165
974
(intmax_t) (proc->pid),
1166
WTERMSIG(proc->status),
1167
strsignal(WTERMSIG(proc->status)));
975
WTERMSIG(proc->status));
976
} else if(WCOREDUMP(proc->status)){
977
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
978
" core\n", proc->name, (intmax_t) (proc->pid));
1168
979
}
1169
980
}
1170
981
1171
982
/* Remove the plugin */
1172
983
FD_CLR(proc->fd, &rfds_all);
1173
984
1174
985
/* Block signal while modifying process_list */
1175
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1176
(SIG_BLOCK,
1177
&sigchld_action.sa_mask,
1178
NULL));
986
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1179
987
if(ret < 0){
1180
error(0, errno, "sigprocmask");
1181
exitstatus = EX_OSERR;
988
perror("sigprocmask");
989
exitstatus = EXIT_FAILURE;
1182
990
goto fallback;
1183
991
}
1184
992
1187
995
proc = next_plugin;
1188
996
1189
997
/* We are done modifying process list, so unblock signal */
1190
ret = (int)(TEMP_FAILURE_RETRY
1191
(sigprocmask(SIG_UNBLOCK,
1192
&sigchld_action.sa_mask, NULL)));
998
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
999
NULL);
1193
1000
if(ret < 0){
1194
error(0, errno, "sigprocmask");
1195
exitstatus = EX_OSERR;
1001
perror("sigprocmask");
1002
exitstatus = EXIT_FAILURE;
1196
1003
goto fallback;
1197
1004
}
1198
1005
1208
1015
bool bret = print_out_password(proc->buffer,
1209
1016
proc->buffer_length);
1210
1017
if(not bret){
1211
error(0, errno, "print_out_password");
1212
exitstatus = EX_IOERR;
1018
perror("print_out_password");
1019
exitstatus = EXIT_FAILURE;
1213
1020
}
1214
1021
goto fallback;
1215
1022
}
1222
1029
}
1223
1030
/* Before reading, make the process' data buffer large enough */
1224
1031
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1225
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1226
+ (size_t) BUFFER_SIZE);
1227
if(new_buffer == NULL){
1228
error(0, errno, "malloc");
1229
exitstatus = EX_OSERR;
1032
proc->buffer = realloc(proc->buffer, proc->buffer_size
1033
+ (size_t) BUFFER_SIZE);
1034
if(proc->buffer == NULL){
1035
perror("malloc");
1036
exitstatus = EXIT_FAILURE;
1230
1037
goto fallback;
1231
1038
}
1232
proc->buffer = new_buffer;
1233
1039
proc->buffer_size += BUFFER_SIZE;
1234
1040
}
1235
1041
/* Read from the process */
1236
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1237
proc->buffer
1238
+ proc->buffer_length,
1239
BUFFER_SIZE));
1042
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1043
BUFFER_SIZE);
1240
1044
if(sret < 0){
1241
1045
/* Read error from this process; ignore the error */
1242
1046
proc = proc->next;
1250
1054
}
1251
1055
}
1252
1056
}
1253
1254
1057
1058
1255
1059
fallback:
1256
1060
1257
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1258
and exitstatus != EX_OK)){
1061
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1259
1062
/* Fallback if all plugins failed, none are found or an error
1260
1063
occured */
1261
1064
bool bret;
1269
1072
}
1270
1073
bret = print_out_password(passwordbuffer, len);
1271
1074
if(not bret){
1272
error(0, errno, "print_out_password");
1273
exitstatus = EX_IOERR;
1075
perror("print_out_password");
1076
exitstatus = EXIT_FAILURE;
1274
1077
}
1275
1078
}
1276
1079
1277
1080
/* Restore old signal handler */
1278
1081
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1279
1082
if(ret == -1){
1280
error(0, errno, "sigaction");
1281
exitstatus = EX_OSERR;
1083
perror("sigaction");
1084
exitstatus = EXIT_FAILURE;
1282
1085
}
1283
1086
1284
1087
if(custom_argv != NULL){
1288
1091
free(custom_argv);
1289
1092
}
1290
1093
1291
free(direntries);
1292
1293
if(dir_fd != -1){
1294
close(dir_fd);
1094
if(dir != NULL){
1095
closedir(dir);
1295
1096
}
1296
1097
1297
1098
/* Kill the processes */
1301
1102
ret = kill(p->pid, SIGTERM);
1302
1103
if(ret == -1 and errno != ESRCH){
1303
1104
/* Set-uid proccesses might not get closed */
1304
error(0, errno, "kill");
1105
perror("kill");
1305
1106
}
1306
1107
}
1307
1108
}
1308
1109
1309
1110
/* Wait for any remaining child processes to terminate */
1310
do {
1111
do{
1311
1112
ret = wait(NULL);
1312
1113
} while(ret >= 0);
1313
1114
if(errno != ECHILD){
1314
error(0, errno, "wait");
1115
perror("wait");
1315
1116
}
1316
1117
1317
1118
free_plugin_list();
1318
1119
1319
1120
free(plugindir);
1320
free(pluginhelperdir);
1321
1121
free(argfile);
1322
1122
1323
1123
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0