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- Committer: Teddy Hogeborn
- Date: 2018-08-15 09:26:02 UTC
- 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;
90
98
size_t buffer_length;
91
99
bool eof;
92
100
volatile sig_atomic_t completed;
93
volatile int status;
101
int status;
94
102
struct plugin *next;
95
103
} plugin;
96
104
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
224
265
status. */
225
266
static void handle_sigchld(__attribute__((unused)) int sig){
267
int old_errno = errno;
226
268
while(true){
227
269
plugin *proc = plugin_list;
228
270
int status;
236
278
/* No child processes */
237
279
break;
238
280
}
239
perror("waitpid");
281
error(0, errno, "waitpid");
240
282
}
241
283
242
284
/* A child exited, find it in process_list */
250
292
proc->status = status;
251
293
proc->completed = 1;
252
294
}
295
errno = old_errno;
253
296
}
254
297
255
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
256
300
static bool print_out_password(const char *buffer, size_t length){
257
301
ssize_t ret;
258
302
for(size_t written = 0; written < length; written += (size_t)ret){
266
310
}
267
311
268
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
269
314
static void free_plugin(plugin *plugin_node){
270
315
271
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
277
322
}
278
323
free(plugin_node->environ);
279
324
free(plugin_node->buffer);
280
325
281
326
/* Removes the plugin from the singly-linked list */
282
327
if(plugin_node == plugin_list){
283
328
/* First one - simple */
303
348
304
349
int main(int argc, char *argv[]){
305
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
306
352
char *argfile = NULL;
307
353
FILE *conffp;
308
size_t d_name_len;
309
DIR *dir = NULL;
310
struct dirent *dirst;
354
struct dirent **direntries = NULL;
311
355
struct stat st;
312
356
fd_set rfds_all;
313
int ret, numchars, maxfd = 0;
357
int ret, maxfd = 0;
314
358
ssize_t sret;
315
intmax_t tmpmax;
316
359
uid_t uid = 65534;
317
360
gid_t gid = 65534;
318
361
bool debug = false;
322
365
.sa_flags = SA_NOCLDSTOP };
323
366
char **custom_argv = NULL;
324
367
int custom_argc = 0;
368
int dir_fd = -1;
325
369
326
370
/* Establish a signal handler */
327
371
sigemptyset(&sigchld_action.sa_mask);
328
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
329
373
if(ret == -1){
330
perror("sigaddset");
331
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
332
376
goto fallback;
333
377
}
334
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
335
379
if(ret == -1){
336
perror("sigaction");
337
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
338
382
goto fallback;
339
383
}
340
384
372
416
.doc = "Group ID the plugins will run as", .group = 3 },
373
417
{ .name = "debug", .key = 132,
374
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 },
375
432
{ .name = NULL }
376
433
};
377
434
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state){
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
380
438
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
381
441
case 'g': /* --global-options */
382
if(arg != NULL){
383
char *p;
384
while((p = strsep(&arg, ",")) != NULL){
385
if(p[0] == '\0'){
386
continue;
387
}
388
if(not add_argument(getplugin(NULL), p)){
389
perror("add_argument");
390
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;
391
447
}
392
448
}
449
errno = 0;
393
450
}
394
451
break;
395
452
case 'G': /* --global-env */
396
if(arg == NULL){
397
break;
398
}
399
if(not add_environment(getplugin(NULL), arg, true)){
400
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
401
455
}
402
456
break;
403
457
case 'o': /* --options-for */
404
if(arg != NULL){
405
char *p_name = strsep(&arg, ":");
406
if(p_name[0] == '\0' or arg == NULL){
407
break;
408
}
409
char *opt = strsep(&arg, ":");
410
if(opt[0] == '\0' or opt == NULL){
411
break;
412
}
413
char *p;
414
while((p = strsep(&opt, ",")) != NULL){
415
if(p[0] == '\0'){
416
continue;
417
}
418
if(not add_argument(getplugin(p_name), p)){
419
perror("add_argument");
420
return ARGP_ERR_UNKNOWN;
421
}
422
}
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;
423
479
}
424
480
break;
425
481
case 'E': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
429
482
{
430
483
char *envdef = strchr(arg, ':');
431
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
432
487
break;
433
488
}
434
489
*envdef = '\0';
435
if(not add_environment(getplugin(arg), envdef+1, true)){
436
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;
437
498
}
438
499
}
439
500
break;
440
501
case 'd': /* --disable */
441
if(arg != NULL){
502
{
442
503
plugin *p = getplugin(arg);
443
if(p == NULL){
444
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
445
507
}
446
p->disabled = true;
447
508
}
448
509
break;
449
510
case 'e': /* --enable */
450
if(arg != NULL){
511
{
451
512
plugin *p = getplugin(arg);
452
if(p == NULL){
453
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
454
516
}
455
p->disabled = false;
456
517
}
457
518
break;
458
519
case 128: /* --plugin-dir */
459
520
free(plugindir);
460
521
plugindir = strdup(arg);
461
if(plugindir == NULL){
462
perror("strdup");
463
}
522
if(plugindir != NULL){
523
errno = 0;
524
}
464
525
break;
465
526
case 129: /* --config-file */
466
527
/* This is already done by parse_opt_config_file() */
467
528
break;
468
529
case 130: /* --userid */
469
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
470
if(ret < 1 or tmpmax != (uid_t)tmpmax
471
or arg[numchars] != '\0'){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
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;
476
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
477
539
break;
478
540
case 131: /* --groupid */
479
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
480
if(ret < 1 or tmpmax != (gid_t)tmpmax
481
or arg[numchars] != '\0'){
482
fprintf(stderr, "Bad group ID number: \"%s\", using %"
483
PRIdMAX "\n", arg, (intmax_t)gid);
484
} else {
485
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;
486
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
487
550
break;
488
551
case 132: /* --debug */
489
552
debug = true;
490
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;
491
575
/*
492
576
* When adding more options before this line, remember to also add a
493
577
* "case" to the "parse_opt_config_file" function below.
496
580
/* Cryptsetup always passes an argument, which is an empty
497
581
string if "none" was specified in /etc/crypttab. So if
498
582
argument was empty, we ignore it silently. */
499
if(arg[0] != '\0'){
500
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
501
585
}
502
break;
503
case ARGP_KEY_END:
504
break;
586
/* FALLTHROUGH */
505
587
default:
506
588
return ARGP_ERR_UNKNOWN;
507
589
}
508
return 0;
590
return errno; /* Set to 0 at start */
509
591
}
510
592
511
593
/* This option parser is the same as parse_opt() above, except it
513
595
error_t parse_opt_config_file(int key, char *arg,
514
596
__attribute__((unused))
515
597
struct argp_state *state){
598
errno = 0;
516
599
switch(key){
517
600
case 'g': /* --global-options */
518
601
case 'G': /* --global-env */
525
608
case 129: /* --config-file */
526
609
free(argfile);
527
610
argfile = strdup(arg);
528
if(argfile == NULL){
529
perror("strdup");
611
if(argfile != NULL){
612
errno = 0;
530
613
}
531
break;
614
break;
532
615
case 130: /* --userid */
533
616
case 131: /* --groupid */
534
617
case 132: /* --debug */
618
case 133: /* --plugin-helper-dir */
619
case '?': /* --help */
620
case -3: /* --usage */
621
case 'V': /* --version */
535
622
case ARGP_KEY_ARG:
536
case ARGP_KEY_END:
537
623
break;
538
624
default:
539
625
return ARGP_ERR_UNKNOWN;
540
626
}
541
return 0;
627
return errno;
542
628
}
543
629
544
630
struct argp argp = { .options = options,
548
634
549
635
/* Parse using parse_opt_config_file() in order to get the custom
550
636
config file location, if any. */
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
553
fprintf(stderr, "Unknown error while parsing arguments\n");
554
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;
555
651
goto fallback;
556
652
}
557
653
563
659
conffp = fopen(AFILE, "r");
564
660
} else {
565
661
conffp = fopen(argfile, "r");
566
}
662
}
567
663
if(conffp != NULL){
568
664
char *org_line = NULL;
569
665
char *p, *arg, *new_arg, *line;
570
666
size_t size = 0;
571
667
const char whitespace_delims[] = " \r\t\f\v\n";
572
668
const char comment_delim[] = "#";
573
669
574
670
custom_argc = 1;
575
671
custom_argv = malloc(sizeof(char*) * 2);
576
672
if(custom_argv == NULL){
577
perror("malloc");
578
exitstatus = EXIT_FAILURE;
673
error(0, errno, "malloc");
674
exitstatus = EX_OSERR;
579
675
goto fallback;
580
676
}
581
677
custom_argv[0] = argv[0];
582
678
custom_argv[1] = NULL;
583
679
584
680
/* for each line in the config file, strip whitespace and ignore
585
681
commented text */
586
682
while(true){
588
684
if(sret == -1){
589
685
break;
590
686
}
591
687
592
688
line = org_line;
593
689
arg = strsep(&line, comment_delim);
594
690
while((p = strsep(&arg, whitespace_delims)) != NULL){
597
693
}
598
694
new_arg = strdup(p);
599
695
if(new_arg == NULL){
600
perror("strdup");
601
exitstatus = EXIT_FAILURE;
696
error(0, errno, "strdup");
697
exitstatus = EX_OSERR;
602
698
free(org_line);
603
699
goto fallback;
604
700
}
605
701
606
702
custom_argc += 1;
607
custom_argv = realloc(custom_argv, sizeof(char *)
608
* ((unsigned int) custom_argc + 1));
609
if(custom_argv == NULL){
610
perror("realloc");
611
exitstatus = EXIT_FAILURE;
612
free(org_line);
613
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
}
614
715
}
615
716
custom_argv[custom_argc-1] = new_arg;
616
custom_argv[custom_argc] = NULL;
717
custom_argv[custom_argc] = NULL;
617
718
}
618
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
}
619
728
free(org_line);
620
729
} else {
621
730
/* Check for harmful errors and go to fallback. Other errors might
622
731
not affect opening plugins */
623
732
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
624
perror("fopen");
625
exitstatus = EXIT_FAILURE;
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
626
735
goto fallback;
627
736
}
628
737
}
629
/* If there was any arguments from configuration file,
630
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 */
631
740
if(custom_argv != NULL){
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
633
0, NULL);
634
if(ret == ARGP_ERR_UNKNOWN){
635
fprintf(stderr, "Unknown error while parsing arguments\n");
636
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;
637
755
goto fallback;
638
756
}
639
757
}
640
758
641
759
/* Parse actual command line arguments, to let them override the
642
760
config file */
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
645
fprintf(stderr, "Unknown error while parsing arguments\n");
646
exitstatus = EXIT_FAILURE;
647
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
}
648
794
}
649
795
650
796
if(debug){
651
for(plugin *p = plugin_list; p != NULL; p=p->next){
797
for(plugin *p = plugin_list; p != NULL; p = p->next){
652
798
fprintf(stderr, "Plugin: %s has %d arguments\n",
653
799
p->name ? p->name : "Global", p->argc - 1);
654
800
for(char **a = p->argv; *a != NULL; a++){
661
807
}
662
808
}
663
809
664
/* Strip permissions down to nobody */
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);
836
if(ret == -1){
837
error(0, errno, "setgid");
838
}
665
839
ret = setuid(uid);
666
840
if(ret == -1){
667
perror("setuid");
668
}
669
setgid(gid);
670
if(ret == -1){
671
perror("setgid");
672
}
673
674
if(plugindir == NULL){
675
dir = opendir(PDIR);
676
} else {
677
dir = opendir(plugindir);
678
}
679
680
if(dir == NULL){
681
perror("Could not open plugin dir");
682
exitstatus = EXIT_FAILURE;
683
goto fallback;
684
}
685
686
/* 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 */
687
845
{
688
int dir_fd = dirfd(dir);
689
if(dir_fd >= 0){
690
ret = set_cloexec_flag(dir_fd);
691
if(ret < 0){
692
perror("set_cloexec_flag");
693
exitstatus = EXIT_FAILURE;
694
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;
695
890
}
696
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;
697
902
}
698
903
699
904
FD_ZERO(&rfds_all);
700
905
701
906
/* Read and execute any executable in the plugin directory*/
702
while(true){
703
dirst = readdir(dir);
704
705
/* All directory entries have been processed */
706
if(dirst == NULL){
707
if(errno == EBADF){
708
perror("readdir");
709
exitstatus = EXIT_FAILURE;
710
goto fallback;
711
}
712
break;
713
}
714
715
d_name_len = strlen(dirst->d_name);
716
717
/* Ignore dotfiles, backup files and other junk */
718
{
719
bool bad_name = false;
720
721
const char const *bad_prefixes[] = { ".", "#", NULL };
722
723
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
724
".dpkg-old",
725
".dpkg-bak",
726
".dpkg-divert", NULL };
727
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
728
size_t pre_len = strlen(*pre);
729
if((d_name_len >= pre_len)
730
and strncmp((dirst->d_name), *pre, pre_len) == 0){
731
if(debug){
732
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
733
" with bad prefix %s\n", dirst->d_name, *pre);
734
}
735
bad_name = true;
736
break;
737
}
738
}
739
if(bad_name){
740
continue;
741
}
742
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
743
size_t suf_len = strlen(*suf);
744
if((d_name_len >= suf_len)
745
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
746
== 0)){
747
if(debug){
748
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
749
" with bad suffix %s\n", dirst->d_name, *suf);
750
}
751
bad_name = true;
752
break;
753
}
754
}
755
756
if(bad_name){
757
continue;
758
}
759
}
760
761
char *filename;
762
if(plugindir == NULL){
763
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
764
} else {
765
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
766
}
767
if(ret < 0){
768
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]);
769
913
continue;
770
914
}
771
772
ret = stat(filename, &st);
915
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
773
916
if(ret == -1){
774
perror("stat");
775
free(filename);
917
error(0, errno, "stat");
918
close(plugin_fd);
919
free(direntries[i]);
776
920
continue;
777
921
}
778
922
779
923
/* Ignore non-executable files */
780
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)){
781
927
if(debug){
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
783
" 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);
784
932
}
785
free(filename);
933
close(plugin_fd);
934
free(direntries[i]);
786
935
continue;
787
936
}
788
937
789
plugin *p = getplugin(dirst->d_name);
938
plugin *p = getplugin(direntries[i]->d_name);
790
939
if(p == NULL){
791
perror("getplugin");
792
free(filename);
940
error(0, errno, "getplugin");
941
close(plugin_fd);
942
free(direntries[i]);
793
943
continue;
794
944
}
795
945
if(p->disabled){
796
946
if(debug){
797
947
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
798
dirst->d_name);
948
direntries[i]->d_name);
799
949
}
800
free(filename);
950
close(plugin_fd);
951
free(direntries[i]);
801
952
continue;
802
953
}
803
954
{
806
957
if(g != NULL){
807
958
for(char **a = g->argv + 1; *a != NULL; a++){
808
959
if(not add_argument(p, *a)){
809
perror("add_argument");
960
error(0, errno, "add_argument");
810
961
}
811
962
}
812
963
/* Add global environment variables */
813
964
for(char **e = g->environ; *e != NULL; e++){
814
965
if(not add_environment(p, *e, false)){
815
perror("add_environment");
966
error(0, errno, "add_environment");
816
967
}
817
968
}
818
969
}
819
970
}
820
/* If this plugin has any environment variables, we will call
821
using execve and need to duplicate the environment from this
822
process, too. */
971
/* If this plugin has any environment variables, we need to
972
duplicate the environment from this process, too. */
823
973
if(p->environ[0] != NULL){
824
974
for(char **e = environ; *e != NULL; e++){
825
975
if(not add_environment(p, *e, false)){
826
perror("add_environment");
976
error(0, errno, "add_environment");
827
977
}
828
978
}
829
979
}
830
980
831
981
int pipefd[2];
832
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 */
833
987
if(ret == -1){
834
perror("pipe");
835
exitstatus = EXIT_FAILURE;
836
goto fallback;
837
}
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
838
1003
/* Ask OS to automatic close the pipe on exec */
839
1004
ret = set_cloexec_flag(pipefd[0]);
840
1005
if(ret < 0){
841
perror("set_cloexec_flag");
842
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]);
843
1011
goto fallback;
844
1012
}
845
1013
ret = set_cloexec_flag(pipefd[1]);
846
1014
if(ret < 0){
847
perror("set_cloexec_flag");
848
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]);
849
1020
goto fallback;
850
1021
}
1022
#endif /* not O_CLOEXEC */
851
1023
/* Block SIGCHLD until process is safely in process list */
852
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));
853
1027
if(ret < 0){
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
1028
error(0, errno, "sigprocmask");
1029
exitstatus = EX_OSERR;
1030
free(direntries[i]);
856
1031
goto fallback;
857
1032
}
858
1033
/* Starting a new process to be watched */
859
pid_t pid = fork();
1034
pid_t pid;
1035
do {
1036
pid = fork();
1037
} while(pid == -1 and errno == EINTR);
860
1038
if(pid == -1){
861
perror("fork");
862
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]);
863
1046
goto fallback;
864
1047
}
865
1048
if(pid == 0){
866
1049
/* this is the child process */
867
1050
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
868
1051
if(ret < 0){
869
perror("sigaction");
870
_exit(EXIT_FAILURE);
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
871
1054
}
872
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
873
1056
if(ret < 0){
874
perror("sigprocmask");
875
_exit(EXIT_FAILURE);
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
876
1059
}
877
1060
878
1061
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
879
1062
if(ret == -1){
880
perror("dup2");
881
_exit(EXIT_FAILURE);
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
882
1065
}
883
1066
884
if(dirfd(dir) < 0){
885
/* If dir has no file descriptor, we could not set FD_CLOEXEC
886
above and must now close it manually here. */
887
closedir(dir);
888
}
889
if(p->environ[0] == NULL){
890
if(execv(filename, p->argv) < 0){
891
perror("execv");
892
_exit(EXIT_FAILURE);
893
}
894
} else {
895
if(execve(filename, p->argv, p->environ) < 0){
896
perror("execve");
897
_exit(EXIT_FAILURE);
898
}
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);
899
1073
}
900
1074
/* no return */
901
1075
}
902
1076
/* Parent process */
903
1077
close(pipefd[1]); /* Close unused write end of pipe */
904
free(filename);
905
plugin *new_plugin = getplugin(dirst->d_name);
1078
close(plugin_fd);
1079
plugin *new_plugin = getplugin(direntries[i]->d_name);
906
1080
if(new_plugin == NULL){
907
perror("getplugin");
908
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)));
909
1085
if(ret < 0){
910
perror("sigprocmask");
1086
error(0, errno, "sigprocmask");
911
1087
}
912
exitstatus = EXIT_FAILURE;
1088
exitstatus = EX_OSERR;
1089
free(direntries[i]);
913
1090
goto fallback;
914
1091
}
1092
free(direntries[i]);
915
1093
916
1094
new_plugin->pid = pid;
917
1095
new_plugin->fd = pipefd[0];
918
1096
919
1097
/* Unblock SIGCHLD so signal handler can be run if this process
920
1098
has already completed */
921
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));
922
1102
if(ret < 0){
923
perror("sigprocmask");
924
exitstatus = EXIT_FAILURE;
1103
error(0, errno, "sigprocmask");
1104
exitstatus = EX_OSERR;
925
1105
goto fallback;
926
1106
}
927
1107
932
1112
}
933
1113
}
934
1114
935
closedir(dir);
936
dir = NULL;
1115
free(direntries);
1116
direntries = NULL;
1117
close(dir_fd);
1118
dir_fd = -1;
1119
free_plugin(getplugin(NULL));
937
1120
938
1121
for(plugin *p = plugin_list; p != NULL; p = p->next){
939
1122
if(p->pid != 0){
950
1133
while(plugin_list){
951
1134
fd_set rfds = rfds_all;
952
1135
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1136
if(select_ret == -1 and errno != EINTR){
1137
error(0, errno, "select");
1138
exitstatus = EX_OSERR;
956
1139
goto fallback;
957
1140
}
958
1141
/* OK, now either a process completed, or something can be read
959
1142
from one of them */
960
1143
for(plugin *proc = plugin_list; proc != NULL;){
961
1144
/* Is this process completely done? */
962
if(proc->eof and proc->completed){
1145
if(proc->completed and proc->eof){
963
1146
/* Only accept the plugin output if it exited cleanly */
964
1147
if(not WIFEXITED(proc->status)
965
1148
or WEXITSTATUS(proc->status) != 0){
966
1149
/* Bad exit by plugin */
967
1150
968
1151
if(debug){
969
1152
if(WIFEXITED(proc->status)){
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %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),
972
1156
WEXITSTATUS(proc->status));
973
1157
} else if(WIFSIGNALED(proc->status)){
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
976
WTERMSIG(proc->status));
977
} else if(WCOREDUMP(proc->status)){
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(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)));
980
1163
}
981
1164
}
982
1165
983
1166
/* Remove the plugin */
984
1167
FD_CLR(proc->fd, &rfds_all);
985
1168
986
1169
/* Block signal while modifying process_list */
987
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));
988
1174
if(ret < 0){
989
perror("sigprocmask");
990
exitstatus = EXIT_FAILURE;
1175
error(0, errno, "sigprocmask");
1176
exitstatus = EX_OSERR;
991
1177
goto fallback;
992
1178
}
993
1179
996
1182
proc = next_plugin;
997
1183
998
1184
/* We are done modifying process list, so unblock signal */
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1000
NULL);
1185
ret = (int)(TEMP_FAILURE_RETRY
1186
(sigprocmask(SIG_UNBLOCK,
1187
&sigchld_action.sa_mask, NULL)));
1001
1188
if(ret < 0){
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1189
error(0, errno, "sigprocmask");
1190
exitstatus = EX_OSERR;
1004
1191
goto fallback;
1005
1192
}
1006
1193
1016
1203
bool bret = print_out_password(proc->buffer,
1017
1204
proc->buffer_length);
1018
1205
if(not bret){
1019
perror("print_out_password");
1020
exitstatus = EXIT_FAILURE;
1206
error(0, errno, "print_out_password");
1207
exitstatus = EX_IOERR;
1021
1208
}
1022
1209
goto fallback;
1023
1210
}
1030
1217
}
1031
1218
/* Before reading, make the process' data buffer large enough */
1032
1219
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1033
proc->buffer = realloc(proc->buffer, proc->buffer_size
1034
+ (size_t) BUFFER_SIZE);
1035
if(proc->buffer == NULL){
1036
perror("malloc");
1037
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;
1038
1225
goto fallback;
1039
1226
}
1227
proc->buffer = new_buffer;
1040
1228
proc->buffer_size += BUFFER_SIZE;
1041
1229
}
1042
1230
/* Read from the process */
1043
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1044
BUFFER_SIZE);
1231
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1232
proc->buffer
1233
+ proc->buffer_length,
1234
BUFFER_SIZE));
1045
1235
if(sret < 0){
1046
1236
/* Read error from this process; ignore the error */
1047
1237
proc = proc->next;
1055
1245
}
1056
1246
}
1057
1247
}
1058
1059
1248
1249
1060
1250
fallback:
1061
1251
1062
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1252
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1253
and exitstatus != EX_OK)){
1063
1254
/* Fallback if all plugins failed, none are found or an error
1064
1255
occured */
1065
1256
bool bret;
1073
1264
}
1074
1265
bret = print_out_password(passwordbuffer, len);
1075
1266
if(not bret){
1076
perror("print_out_password");
1077
exitstatus = EXIT_FAILURE;
1267
error(0, errno, "print_out_password");
1268
exitstatus = EX_IOERR;
1078
1269
}
1079
1270
}
1080
1271
1081
1272
/* Restore old signal handler */
1082
1273
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1083
1274
if(ret == -1){
1084
perror("sigaction");
1085
exitstatus = EXIT_FAILURE;
1275
error(0, errno, "sigaction");
1276
exitstatus = EX_OSERR;
1086
1277
}
1087
1278
1088
1279
if(custom_argv != NULL){
1092
1283
free(custom_argv);
1093
1284
}
1094
1285
1095
if(dir != NULL){
1096
closedir(dir);
1286
free(direntries);
1287
1288
if(dir_fd != -1){
1289
close(dir_fd);
1097
1290
}
1098
1291
1099
1292
/* Kill the processes */
1103
1296
ret = kill(p->pid, SIGTERM);
1104
1297
if(ret == -1 and errno != ESRCH){
1105
1298
/* Set-uid proccesses might not get closed */
1106
perror("kill");
1299
error(0, errno, "kill");
1107
1300
}
1108
1301
}
1109
1302
}
1110
1303
1111
1304
/* Wait for any remaining child processes to terminate */
1112
do{
1305
do {
1113
1306
ret = wait(NULL);
1114
1307
} while(ret >= 0);
1115
1308
if(errno != ECHILD){
1116
perror("wait");
1309
error(0, errno, "wait");
1117
1310
}
1118
1311
1119
1312
free_plugin_list();
1120
1313
1121
1314
free(plugindir);
1315
free(pluginhelperdir);
1122
1316
free(argfile);
1123
1317
1124
1318
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0