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- Committer: Teddy Hogeborn
- Date: 2018-08-15 09:26:02 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 368.
- Revision ID: teddy@recompile.se-20180815092602-xoyb5s6gf8376i7u
mandos-client: Set system clock if necessary
* plugins.d/mandos-client.c (init_gpgme/import_key): If the system
clock is not set, or set to january 1970, set the system clock to
the more plausible value that is the mtime of the key file. This is
required by GnuPG to be able to import the keys. (We can't pass the
--ignore-time-conflict or the --ignore-valid-from options though
GPGME.)
* plugins.d/mandos-client.c (init_gpgme/import_key): If the system
clock is not set, or set to january 1970, set the system clock to
the more plausible value that is the mtime of the key file. This is
required by GnuPG to be able to import the keys. (We can't pass the
--ignore-time-conflict or the --ignore-valid-from options though
GPGME.)
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
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
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
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
27
O_CLOEXEC, pipe2() */
27
28
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
29
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
30
realloc() */
30
31
#include <stdbool.h> /* bool, true, false */
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() */
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() */
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() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
43
#include <iso646.h> /* and, or, not */
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() */
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
*/
53
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
56
57
#include <errno.h> /* errno */
57
58
#include <argp.h> /* struct argp_option, struct
58
59
argp_state, struct argp,
62
63
#include <signal.h> /* struct sigaction, sigemptyset(),
63
64
sigaddset(), sigaction(),
64
65
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
SIG_UNBLOCK, kill() */
66
SIG_UNBLOCK, kill(), sig_atomic_t
67
*/
66
68
#include <errno.h> /* errno, EBADF */
67
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
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
75
69
76
#define BUFFER_SIZE 256
70
77
71
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
72
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
73
81
74
82
const char *argp_program_version = "plugin-runner " VERSION;
75
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
84
77
85
typedef struct plugin{
78
86
char *name; /* can be NULL or any plugin name */
81
89
char **environ;
82
90
int envc;
83
91
bool disabled;
84
92
85
93
/* Variables used for running processes*/
86
94
pid_t pid;
87
95
int fd;
98
106
99
107
/* Gets an existing plugin based on name,
100
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
101
110
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
111
/* Check for existing plugin with that name */
103
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
104
113
if((p->name == name)
105
114
or (p->name and name and (strcmp(p->name, name) == 0))){
107
116
}
108
117
}
109
118
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
111
123
if(new_plugin == NULL){
112
124
return NULL;
113
125
}
114
126
char *copy_name = NULL;
115
127
if(name != NULL){
116
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
117
131
if(copy_name == NULL){
132
int e = errno;
118
133
free(new_plugin);
134
errno = e;
119
135
return NULL;
120
136
}
121
137
}
125
141
.disabled = false,
126
142
.next = plugin_list };
127
143
128
new_plugin->argv = malloc(sizeof(char *) * 2);
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
129
147
if(new_plugin->argv == NULL){
148
int e = errno;
130
149
free(copy_name);
131
150
free(new_plugin);
151
errno = e;
132
152
return NULL;
133
153
}
134
154
new_plugin->argv[0] = copy_name;
135
155
new_plugin->argv[1] = NULL;
136
156
137
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
138
160
if(new_plugin->environ == NULL){
161
int e = errno;
139
162
free(copy_name);
140
163
free(new_plugin->argv);
141
164
free(new_plugin);
165
errno = e;
142
166
return NULL;
143
167
}
144
168
new_plugin->environ[0] = NULL;
149
173
}
150
174
151
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
152
177
static bool add_to_char_array(const char *new, char ***array,
153
178
int *len){
154
179
/* Resize the pointed-to array to hold one more pointer */
155
*array = realloc(*array, sizeof(char *)
156
* (size_t) ((*len) + 2));
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);
157
185
/* Malloc check */
158
if(*array == NULL){
186
if(new_array == NULL){
159
187
return false;
160
188
}
189
*array = new_array;
161
190
/* Make a copy of the new string */
162
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
163
195
if(copy == NULL){
164
196
return false;
165
197
}
172
204
}
173
205
174
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
175
208
static bool add_argument(plugin *p, const char *arg){
176
209
if(p == NULL){
177
210
return false;
180
213
}
181
214
182
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
183
217
static bool add_environment(plugin *p, const char *def, bool replace){
184
218
if(p == NULL){
185
219
return false;
187
221
/* namelen = length of name of environment variable */
188
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
189
223
/* Search for this environment variable */
190
for(char **e = p->environ; *e != NULL; e++){
191
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
192
226
/* It already exists */
193
227
if(replace){
194
char *new = realloc(*e, strlen(def) + 1);
195
if(new == NULL){
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){
196
233
return false;
197
234
}
198
*e = new;
199
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
200
237
}
201
238
return true;
202
239
}
204
241
return add_to_char_array(def, &(p->environ), &(p->envc));
205
242
}
206
243
244
#ifndef O_CLOEXEC
207
245
/*
208
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
209
247
* Descriptor Flags".
210
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
249
*/
250
__attribute__((warn_unused_result))
212
251
static int set_cloexec_flag(int fd){
213
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
253
/* If reading the flags failed, return error indication now. */
215
254
if(ret < 0){
216
255
return ret;
217
256
}
218
257
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
220
260
}
261
#endif /* not O_CLOEXEC */
221
262
222
263
223
264
/* Mark processes as completed when they exit, and save their exit
237
278
/* No child processes */
238
279
break;
239
280
}
240
perror("waitpid");
281
error(0, errno, "waitpid");
241
282
}
242
283
243
284
/* A child exited, find it in process_list */
255
296
}
256
297
257
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
258
300
static bool print_out_password(const char *buffer, size_t length){
259
301
ssize_t ret;
260
302
for(size_t written = 0; written < length; written += (size_t)ret){
268
310
}
269
311
270
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
271
314
static void free_plugin(plugin *plugin_node){
272
315
273
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
279
322
}
280
323
free(plugin_node->environ);
281
324
free(plugin_node->buffer);
282
325
283
326
/* Removes the plugin from the singly-linked list */
284
327
if(plugin_node == plugin_list){
285
328
/* First one - simple */
305
348
306
349
int main(int argc, char *argv[]){
307
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
308
352
char *argfile = NULL;
309
353
FILE *conffp;
310
size_t d_name_len;
311
DIR *dir = NULL;
312
struct dirent *dirst;
354
struct dirent **direntries = NULL;
313
355
struct stat st;
314
356
fd_set rfds_all;
315
int ret, numchars, maxfd = 0;
357
int ret, maxfd = 0;
316
358
ssize_t sret;
317
intmax_t tmpmax;
318
359
uid_t uid = 65534;
319
360
gid_t gid = 65534;
320
361
bool debug = false;
324
365
.sa_flags = SA_NOCLDSTOP };
325
366
char **custom_argv = NULL;
326
367
int custom_argc = 0;
368
int dir_fd = -1;
327
369
328
370
/* Establish a signal handler */
329
371
sigemptyset(&sigchld_action.sa_mask);
330
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
331
373
if(ret == -1){
332
perror("sigaddset");
333
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
334
376
goto fallback;
335
377
}
336
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
337
379
if(ret == -1){
338
perror("sigaction");
339
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
340
382
goto fallback;
341
383
}
342
384
374
416
.doc = "Group ID the plugins will run as", .group = 3 },
375
417
{ .name = "debug", .key = 132,
376
418
.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 },
377
432
{ .name = NULL }
378
433
};
379
434
380
error_t parse_opt(int key, char *arg, __attribute__((unused))
381
struct argp_state *state){
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
382
438
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
383
441
case 'g': /* --global-options */
384
if(arg != NULL){
385
char *p;
386
while((p = strsep(&arg, ",")) != NULL){
387
if(p[0] == '\0'){
388
continue;
389
}
390
if(not add_argument(getplugin(NULL), p)){
391
perror("add_argument");
392
return ARGP_ERR_UNKNOWN;
442
{
443
char *plugin_option;
444
while((plugin_option = strsep(&arg, ",")) != NULL){
445
if(not add_argument(getplugin(NULL), plugin_option)){
446
break;
393
447
}
394
448
}
449
errno = 0;
395
450
}
396
451
break;
397
452
case 'G': /* --global-env */
398
if(arg == NULL){
399
break;
400
}
401
if(not add_environment(getplugin(NULL), arg, true)){
402
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
403
455
}
404
456
break;
405
457
case 'o': /* --options-for */
406
if(arg != NULL){
407
char *p_name = strsep(&arg, ":");
408
if(p_name[0] == '\0' or arg == NULL){
409
break;
410
}
411
char *opt = strsep(&arg, ":");
412
if(opt[0] == '\0' or opt == NULL){
413
break;
414
}
415
char *p;
416
while((p = strsep(&opt, ",")) != NULL){
417
if(p[0] == '\0'){
418
continue;
419
}
420
if(not add_argument(getplugin(p_name), p)){
421
perror("add_argument");
422
return ARGP_ERR_UNKNOWN;
423
}
424
}
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;
476
}
477
}
478
errno = 0;
425
479
}
426
480
break;
427
481
case 'E': /* --env-for */
428
if(arg == NULL){
429
break;
430
}
431
482
{
432
483
char *envdef = strchr(arg, ':');
433
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
434
487
break;
435
488
}
436
489
*envdef = '\0';
437
if(not add_environment(getplugin(arg), envdef+1, true)){
438
perror("add_environment");
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;
439
498
}
440
499
}
441
500
break;
442
501
case 'd': /* --disable */
443
if(arg != NULL){
502
{
444
503
plugin *p = getplugin(arg);
445
if(p == NULL){
446
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
447
507
}
448
p->disabled = true;
449
508
}
450
509
break;
451
510
case 'e': /* --enable */
452
if(arg != NULL){
511
{
453
512
plugin *p = getplugin(arg);
454
if(p == NULL){
455
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
456
516
}
457
p->disabled = false;
458
517
}
459
518
break;
460
519
case 128: /* --plugin-dir */
461
520
free(plugindir);
462
521
plugindir = strdup(arg);
463
if(plugindir == NULL){
464
perror("strdup");
465
}
522
if(plugindir != NULL){
523
errno = 0;
524
}
466
525
break;
467
526
case 129: /* --config-file */
468
527
/* This is already done by parse_opt_config_file() */
469
528
break;
470
529
case 130: /* --userid */
471
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
472
if(ret < 1 or tmpmax != (uid_t)tmpmax
473
or arg[numchars] != '\0'){
474
fprintf(stderr, "Bad user ID number: \"%s\", using %"
475
PRIdMAX "\n", arg, (intmax_t)uid);
476
} else {
477
uid = (uid_t)tmpmax;
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;
478
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
479
539
break;
480
540
case 131: /* --groupid */
481
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
482
if(ret < 1 or tmpmax != (gid_t)tmpmax
483
or arg[numchars] != '\0'){
484
fprintf(stderr, "Bad group ID number: \"%s\", using %"
485
PRIdMAX "\n", arg, (intmax_t)gid);
486
} else {
487
gid = (gid_t)tmpmax;
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;
488
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
489
550
break;
490
551
case 132: /* --debug */
491
552
debug = true;
492
553
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;
493
575
/*
494
576
* When adding more options before this line, remember to also add a
495
577
* "case" to the "parse_opt_config_file" function below.
498
580
/* Cryptsetup always passes an argument, which is an empty
499
581
string if "none" was specified in /etc/crypttab. So if
500
582
argument was empty, we ignore it silently. */
501
if(arg[0] != '\0'){
502
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
503
585
}
504
break;
505
case ARGP_KEY_END:
506
break;
586
/* FALLTHROUGH */
507
587
default:
508
588
return ARGP_ERR_UNKNOWN;
509
589
}
510
return 0;
590
return errno; /* Set to 0 at start */
511
591
}
512
592
513
593
/* This option parser is the same as parse_opt() above, except it
515
595
error_t parse_opt_config_file(int key, char *arg,
516
596
__attribute__((unused))
517
597
struct argp_state *state){
598
errno = 0;
518
599
switch(key){
519
600
case 'g': /* --global-options */
520
601
case 'G': /* --global-env */
527
608
case 129: /* --config-file */
528
609
free(argfile);
529
610
argfile = strdup(arg);
530
if(argfile == NULL){
531
perror("strdup");
611
if(argfile != NULL){
612
errno = 0;
532
613
}
533
break;
614
break;
534
615
case 130: /* --userid */
535
616
case 131: /* --groupid */
536
617
case 132: /* --debug */
618
case 133: /* --plugin-helper-dir */
619
case '?': /* --help */
620
case -3: /* --usage */
621
case 'V': /* --version */
537
622
case ARGP_KEY_ARG:
538
case ARGP_KEY_END:
539
623
break;
540
624
default:
541
625
return ARGP_ERR_UNKNOWN;
542
626
}
543
return 0;
627
return errno;
544
628
}
545
629
546
630
struct argp argp = { .options = options,
550
634
551
635
/* Parse using parse_opt_config_file() in order to get the custom
552
636
config file location, if any. */
553
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
554
if(ret == ARGP_ERR_UNKNOWN){
555
fprintf(stderr, "Unknown error while parsing arguments\n");
556
exitstatus = EXIT_FAILURE;
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;
557
651
goto fallback;
558
652
}
559
653
565
659
conffp = fopen(AFILE, "r");
566
660
} else {
567
661
conffp = fopen(argfile, "r");
568
}
662
}
569
663
if(conffp != NULL){
570
664
char *org_line = NULL;
571
665
char *p, *arg, *new_arg, *line;
572
666
size_t size = 0;
573
667
const char whitespace_delims[] = " \r\t\f\v\n";
574
668
const char comment_delim[] = "#";
575
669
576
670
custom_argc = 1;
577
671
custom_argv = malloc(sizeof(char*) * 2);
578
672
if(custom_argv == NULL){
579
perror("malloc");
580
exitstatus = EXIT_FAILURE;
673
error(0, errno, "malloc");
674
exitstatus = EX_OSERR;
581
675
goto fallback;
582
676
}
583
677
custom_argv[0] = argv[0];
584
678
custom_argv[1] = NULL;
585
679
586
680
/* for each line in the config file, strip whitespace and ignore
587
681
commented text */
588
682
while(true){
590
684
if(sret == -1){
591
685
break;
592
686
}
593
687
594
688
line = org_line;
595
689
arg = strsep(&line, comment_delim);
596
690
while((p = strsep(&arg, whitespace_delims)) != NULL){
599
693
}
600
694
new_arg = strdup(p);
601
695
if(new_arg == NULL){
602
perror("strdup");
603
exitstatus = EXIT_FAILURE;
696
error(0, errno, "strdup");
697
exitstatus = EX_OSERR;
604
698
free(org_line);
605
699
goto fallback;
606
700
}
607
701
608
702
custom_argc += 1;
609
custom_argv = realloc(custom_argv, sizeof(char *)
610
* ((unsigned int) custom_argc + 1));
611
if(custom_argv == NULL){
612
perror("realloc");
613
exitstatus = EXIT_FAILURE;
614
free(org_line);
615
goto fallback;
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
}
616
715
}
617
716
custom_argv[custom_argc-1] = new_arg;
618
custom_argv[custom_argc] = NULL;
717
custom_argv[custom_argc] = NULL;
619
718
}
620
719
}
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
}
621
728
free(org_line);
622
729
} else {
623
730
/* Check for harmful errors and go to fallback. Other errors might
624
731
not affect opening plugins */
625
732
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
626
perror("fopen");
627
exitstatus = EXIT_FAILURE;
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
628
735
goto fallback;
629
736
}
630
737
}
631
/* If there was any arguments from configuration file,
632
pass them to parser as command arguments */
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
633
740
if(custom_argv != NULL){
634
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
635
0, NULL);
636
if(ret == ARGP_ERR_UNKNOWN){
637
fprintf(stderr, "Unknown error while parsing arguments\n");
638
exitstatus = EXIT_FAILURE;
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;
639
755
goto fallback;
640
756
}
641
757
}
642
758
643
759
/* Parse actual command line arguments, to let them override the
644
760
config file */
645
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
646
if(ret == ARGP_ERR_UNKNOWN){
647
fprintf(stderr, "Unknown error while parsing arguments\n");
648
exitstatus = EXIT_FAILURE;
649
goto fallback;
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
}
650
794
}
651
795
652
796
if(debug){
653
for(plugin *p = plugin_list; p != NULL; p=p->next){
797
for(plugin *p = plugin_list; p != NULL; p = p->next){
654
798
fprintf(stderr, "Plugin: %s has %d arguments\n",
655
799
p->name ? p->name : "Global", p->argc - 1);
656
800
for(char **a = p->argv; *a != NULL; a++){
663
807
}
664
808
}
665
809
666
/* Strip permissions down to nobody */
667
setgid(gid);
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);
668
836
if(ret == -1){
669
perror("setgid");
837
error(0, errno, "setgid");
670
838
}
671
839
ret = setuid(uid);
672
840
if(ret == -1){
673
perror("setuid");
674
}
675
676
if(plugindir == NULL){
677
dir = opendir(PDIR);
678
} else {
679
dir = opendir(plugindir);
680
}
681
682
if(dir == NULL){
683
perror("Could not open plugin dir");
684
exitstatus = EXIT_FAILURE;
685
goto fallback;
686
}
687
688
/* Set the FD_CLOEXEC flag on the directory, if possible */
841
error(0, errno, "setuid");
842
}
843
844
/* Open plugin directory with close_on_exec flag */
689
845
{
690
int dir_fd = dirfd(dir);
691
if(dir_fd >= 0){
692
ret = set_cloexec_flag(dir_fd);
693
if(ret < 0){
694
perror("set_cloexec_flag");
695
exitstatus = EXIT_FAILURE;
696
goto fallback;
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;
697
890
}
698
891
}
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;
699
902
}
700
903
701
904
FD_ZERO(&rfds_all);
702
905
703
906
/* Read and execute any executable in the plugin directory*/
704
while(true){
705
dirst = readdir(dir);
706
707
/* All directory entries have been processed */
708
if(dirst == NULL){
709
if(errno == EBADF){
710
perror("readdir");
711
exitstatus = EXIT_FAILURE;
712
goto fallback;
713
}
714
break;
715
}
716
717
d_name_len = strlen(dirst->d_name);
718
719
/* Ignore dotfiles, backup files and other junk */
720
{
721
bool bad_name = false;
722
723
const char const *bad_prefixes[] = { ".", "#", NULL };
724
725
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
726
".dpkg-old",
727
".dpkg-bak",
728
".dpkg-divert", NULL };
729
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
730
size_t pre_len = strlen(*pre);
731
if((d_name_len >= pre_len)
732
and strncmp((dirst->d_name), *pre, pre_len) == 0){
733
if(debug){
734
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
735
" with bad prefix %s\n", dirst->d_name, *pre);
736
}
737
bad_name = true;
738
break;
739
}
740
}
741
if(bad_name){
742
continue;
743
}
744
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
745
size_t suf_len = strlen(*suf);
746
if((d_name_len >= suf_len)
747
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
748
== 0)){
749
if(debug){
750
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
751
" with bad suffix %s\n", dirst->d_name, *suf);
752
}
753
bad_name = true;
754
break;
755
}
756
}
757
758
if(bad_name){
759
continue;
760
}
761
}
762
763
char *filename;
764
if(plugindir == NULL){
765
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
766
} else {
767
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
768
}
769
if(ret < 0){
770
perror("asprintf");
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]);
771
913
continue;
772
914
}
773
774
ret = stat(filename, &st);
915
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
775
916
if(ret == -1){
776
perror("stat");
777
free(filename);
917
error(0, errno, "stat");
918
close(plugin_fd);
919
free(direntries[i]);
778
920
continue;
779
921
}
780
922
781
923
/* Ignore non-executable files */
782
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
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)){
783
927
if(debug){
784
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
785
" with bad type or mode\n", filename);
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);
786
932
}
787
free(filename);
933
close(plugin_fd);
934
free(direntries[i]);
788
935
continue;
789
936
}
790
937
791
plugin *p = getplugin(dirst->d_name);
938
plugin *p = getplugin(direntries[i]->d_name);
792
939
if(p == NULL){
793
perror("getplugin");
794
free(filename);
940
error(0, errno, "getplugin");
941
close(plugin_fd);
942
free(direntries[i]);
795
943
continue;
796
944
}
797
945
if(p->disabled){
798
946
if(debug){
799
947
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
800
dirst->d_name);
948
direntries[i]->d_name);
801
949
}
802
free(filename);
950
close(plugin_fd);
951
free(direntries[i]);
803
952
continue;
804
953
}
805
954
{
808
957
if(g != NULL){
809
958
for(char **a = g->argv + 1; *a != NULL; a++){
810
959
if(not add_argument(p, *a)){
811
perror("add_argument");
960
error(0, errno, "add_argument");
812
961
}
813
962
}
814
963
/* Add global environment variables */
815
964
for(char **e = g->environ; *e != NULL; e++){
816
965
if(not add_environment(p, *e, false)){
817
perror("add_environment");
966
error(0, errno, "add_environment");
818
967
}
819
968
}
820
969
}
821
970
}
822
/* If this plugin has any environment variables, we will call
823
using execve and need to duplicate the environment from this
824
process, too. */
971
/* If this plugin has any environment variables, we need to
972
duplicate the environment from this process, too. */
825
973
if(p->environ[0] != NULL){
826
974
for(char **e = environ; *e != NULL; e++){
827
975
if(not add_environment(p, *e, false)){
828
perror("add_environment");
976
error(0, errno, "add_environment");
829
977
}
830
978
}
831
979
}
832
980
833
981
int pipefd[2];
834
ret = pipe(pipefd);
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 */
835
987
if(ret == -1){
836
perror("pipe");
837
exitstatus = EXIT_FAILURE;
838
goto fallback;
839
}
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
840
1003
/* Ask OS to automatic close the pipe on exec */
841
1004
ret = set_cloexec_flag(pipefd[0]);
842
1005
if(ret < 0){
843
perror("set_cloexec_flag");
844
exitstatus = EXIT_FAILURE;
1006
error(0, errno, "set_cloexec_flag");
1007
close(pipefd[0]);
1008
close(pipefd[1]);
1009
exitstatus = EX_OSERR;
1010
free(direntries[i]);
845
1011
goto fallback;
846
1012
}
847
1013
ret = set_cloexec_flag(pipefd[1]);
848
1014
if(ret < 0){
849
perror("set_cloexec_flag");
850
exitstatus = EXIT_FAILURE;
1015
error(0, errno, "set_cloexec_flag");
1016
close(pipefd[0]);
1017
close(pipefd[1]);
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
851
1020
goto fallback;
852
1021
}
1022
#endif /* not O_CLOEXEC */
853
1023
/* Block SIGCHLD until process is safely in process list */
854
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1024
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1025
&sigchld_action.sa_mask,
1026
NULL));
855
1027
if(ret < 0){
856
perror("sigprocmask");
857
exitstatus = EXIT_FAILURE;
1028
error(0, errno, "sigprocmask");
1029
exitstatus = EX_OSERR;
1030
free(direntries[i]);
858
1031
goto fallback;
859
1032
}
860
1033
/* Starting a new process to be watched */
861
pid_t pid = fork();
1034
pid_t pid;
1035
do {
1036
pid = fork();
1037
} while(pid == -1 and errno == EINTR);
862
1038
if(pid == -1){
863
perror("fork");
864
exitstatus = EXIT_FAILURE;
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]);
865
1046
goto fallback;
866
1047
}
867
1048
if(pid == 0){
868
1049
/* this is the child process */
869
1050
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
870
1051
if(ret < 0){
871
perror("sigaction");
872
_exit(EXIT_FAILURE);
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
873
1054
}
874
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
875
1056
if(ret < 0){
876
perror("sigprocmask");
877
_exit(EXIT_FAILURE);
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
878
1059
}
879
1060
880
1061
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
881
1062
if(ret == -1){
882
perror("dup2");
883
_exit(EXIT_FAILURE);
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
884
1065
}
885
1066
886
if(dirfd(dir) < 0){
887
/* If dir has no file descriptor, we could not set FD_CLOEXEC
888
above and must now close it manually here. */
889
closedir(dir);
890
}
891
if(p->environ[0] == NULL){
892
if(execv(filename, p->argv) < 0){
893
perror("execv");
894
_exit(EXIT_FAILURE);
895
}
896
} else {
897
if(execve(filename, p->argv, p->environ) < 0){
898
perror("execve");
899
_exit(EXIT_FAILURE);
900
}
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);
901
1073
}
902
1074
/* no return */
903
1075
}
904
1076
/* Parent process */
905
1077
close(pipefd[1]); /* Close unused write end of pipe */
906
free(filename);
907
plugin *new_plugin = getplugin(dirst->d_name);
1078
close(plugin_fd);
1079
plugin *new_plugin = getplugin(direntries[i]->d_name);
908
1080
if(new_plugin == NULL){
909
perror("getplugin");
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1081
error(0, errno, "getplugin");
1082
ret = (int)(TEMP_FAILURE_RETRY
1083
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1084
NULL)));
911
1085
if(ret < 0){
912
perror("sigprocmask");
1086
error(0, errno, "sigprocmask");
913
1087
}
914
exitstatus = EXIT_FAILURE;
1088
exitstatus = EX_OSERR;
1089
free(direntries[i]);
915
1090
goto fallback;
916
1091
}
1092
free(direntries[i]);
917
1093
918
1094
new_plugin->pid = pid;
919
1095
new_plugin->fd = pipefd[0];
920
1096
921
1097
/* Unblock SIGCHLD so signal handler can be run if this process
922
1098
has already completed */
923
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1099
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1100
&sigchld_action.sa_mask,
1101
NULL));
924
1102
if(ret < 0){
925
perror("sigprocmask");
926
exitstatus = EXIT_FAILURE;
1103
error(0, errno, "sigprocmask");
1104
exitstatus = EX_OSERR;
927
1105
goto fallback;
928
1106
}
929
1107
934
1112
}
935
1113
}
936
1114
937
closedir(dir);
938
dir = NULL;
1115
free(direntries);
1116
direntries = NULL;
1117
close(dir_fd);
1118
dir_fd = -1;
939
1119
free_plugin(getplugin(NULL));
940
1120
941
1121
for(plugin *p = plugin_list; p != NULL; p = p->next){
953
1133
while(plugin_list){
954
1134
fd_set rfds = rfds_all;
955
1135
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
956
if(select_ret == -1){
957
perror("select");
958
exitstatus = EXIT_FAILURE;
1136
if(select_ret == -1 and errno != EINTR){
1137
error(0, errno, "select");
1138
exitstatus = EX_OSERR;
959
1139
goto fallback;
960
1140
}
961
1141
/* OK, now either a process completed, or something can be read
967
1147
if(not WIFEXITED(proc->status)
968
1148
or WEXITSTATUS(proc->status) != 0){
969
1149
/* Bad exit by plugin */
970
1150
971
1151
if(debug){
972
1152
if(WIFEXITED(proc->status)){
973
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
974
" %d\n", (intmax_t) (proc->pid),
1153
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1154
" status %d\n", proc->name,
1155
(intmax_t) (proc->pid),
975
1156
WEXITSTATUS(proc->status));
976
1157
} else if(WIFSIGNALED(proc->status)){
977
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
978
" %d\n", (intmax_t) (proc->pid),
979
WTERMSIG(proc->status));
980
} else if(WCOREDUMP(proc->status)){
981
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
982
(intmax_t) (proc->pid));
1158
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1159
" signal %d: %s\n", proc->name,
1160
(intmax_t) (proc->pid),
1161
WTERMSIG(proc->status),
1162
strsignal(WTERMSIG(proc->status)));
983
1163
}
984
1164
}
985
1165
986
1166
/* Remove the plugin */
987
1167
FD_CLR(proc->fd, &rfds_all);
988
1168
989
1169
/* Block signal while modifying process_list */
990
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1170
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1171
(SIG_BLOCK,
1172
&sigchld_action.sa_mask,
1173
NULL));
991
1174
if(ret < 0){
992
perror("sigprocmask");
993
exitstatus = EXIT_FAILURE;
1175
error(0, errno, "sigprocmask");
1176
exitstatus = EX_OSERR;
994
1177
goto fallback;
995
1178
}
996
1179
999
1182
proc = next_plugin;
1000
1183
1001
1184
/* We are done modifying process list, so unblock signal */
1002
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1003
NULL);
1185
ret = (int)(TEMP_FAILURE_RETRY
1186
(sigprocmask(SIG_UNBLOCK,
1187
&sigchld_action.sa_mask, NULL)));
1004
1188
if(ret < 0){
1005
perror("sigprocmask");
1006
exitstatus = EXIT_FAILURE;
1189
error(0, errno, "sigprocmask");
1190
exitstatus = EX_OSERR;
1007
1191
goto fallback;
1008
1192
}
1009
1193
1019
1203
bool bret = print_out_password(proc->buffer,
1020
1204
proc->buffer_length);
1021
1205
if(not bret){
1022
perror("print_out_password");
1023
exitstatus = EXIT_FAILURE;
1206
error(0, errno, "print_out_password");
1207
exitstatus = EX_IOERR;
1024
1208
}
1025
1209
goto fallback;
1026
1210
}
1033
1217
}
1034
1218
/* Before reading, make the process' data buffer large enough */
1035
1219
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1036
proc->buffer = realloc(proc->buffer, proc->buffer_size
1037
+ (size_t) BUFFER_SIZE);
1038
if(proc->buffer == NULL){
1039
perror("malloc");
1040
exitstatus = EXIT_FAILURE;
1220
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1221
+ (size_t) BUFFER_SIZE);
1222
if(new_buffer == NULL){
1223
error(0, errno, "malloc");
1224
exitstatus = EX_OSERR;
1041
1225
goto fallback;
1042
1226
}
1227
proc->buffer = new_buffer;
1043
1228
proc->buffer_size += BUFFER_SIZE;
1044
1229
}
1045
1230
/* Read from the process */
1046
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1047
BUFFER_SIZE);
1231
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1232
proc->buffer
1233
+ proc->buffer_length,
1234
BUFFER_SIZE));
1048
1235
if(sret < 0){
1049
1236
/* Read error from this process; ignore the error */
1050
1237
proc = proc->next;
1058
1245
}
1059
1246
}
1060
1247
}
1061
1062
1248
1249
1063
1250
fallback:
1064
1251
1065
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1252
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1253
and exitstatus != EX_OK)){
1066
1254
/* Fallback if all plugins failed, none are found or an error
1067
1255
occured */
1068
1256
bool bret;
1076
1264
}
1077
1265
bret = print_out_password(passwordbuffer, len);
1078
1266
if(not bret){
1079
perror("print_out_password");
1080
exitstatus = EXIT_FAILURE;
1267
error(0, errno, "print_out_password");
1268
exitstatus = EX_IOERR;
1081
1269
}
1082
1270
}
1083
1271
1084
1272
/* Restore old signal handler */
1085
1273
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1086
1274
if(ret == -1){
1087
perror("sigaction");
1088
exitstatus = EXIT_FAILURE;
1275
error(0, errno, "sigaction");
1276
exitstatus = EX_OSERR;
1089
1277
}
1090
1278
1091
1279
if(custom_argv != NULL){
1095
1283
free(custom_argv);
1096
1284
}
1097
1285
1098
if(dir != NULL){
1099
closedir(dir);
1286
free(direntries);
1287
1288
if(dir_fd != -1){
1289
close(dir_fd);
1100
1290
}
1101
1291
1102
1292
/* Kill the processes */
1106
1296
ret = kill(p->pid, SIGTERM);
1107
1297
if(ret == -1 and errno != ESRCH){
1108
1298
/* Set-uid proccesses might not get closed */
1109
perror("kill");
1299
error(0, errno, "kill");
1110
1300
}
1111
1301
}
1112
1302
}
1113
1303
1114
1304
/* Wait for any remaining child processes to terminate */
1115
do{
1305
do {
1116
1306
ret = wait(NULL);
1117
1307
} while(ret >= 0);
1118
1308
if(errno != ECHILD){
1119
perror("wait");
1309
error(0, errno, "wait");
1120
1310
}
1121
1311
1122
1312
free_plugin_list();
1123
1313
1124
1314
free(plugindir);
1315
free(pluginhelperdir);
1125
1316
free(argfile);
1126
1317
1127
1318
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0