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- Committer: Teddy Hogeborn
- Date: 2009-01-13 04:35:19 UTC
- Revision ID: teddy@fukt.bsnet.se-20090113043519-0yr39snphoegq8l1
* plugin-runner.c: Only space changes.
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
- files added:
- initramfs-tools-hook-conf
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files renamed:
- mandos-ctl => mandos-list
- 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,
63
62
#include <signal.h> /* struct sigaction, sigemptyset(),
64
63
sigaddset(), sigaction(),
65
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
66
SIG_UNBLOCK, kill(), sig_atomic_t
67
*/
65
SIG_UNBLOCK, kill() */
68
66
#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() */
75
67
76
68
#define BUFFER_SIZE 256
77
69
78
70
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
71
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
72
82
73
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
75
85
76
typedef struct plugin{
86
77
char *name; /* can be NULL or any plugin name */
89
80
char **environ;
90
81
int envc;
91
82
bool disabled;
92
83
93
84
/* Variables used for running processes*/
94
85
pid_t pid;
95
86
int fd;
97
88
size_t buffer_size;
98
89
size_t buffer_length;
99
90
bool eof;
100
volatile sig_atomic_t completed;
101
int status;
91
volatile bool completed;
92
volatile int status;
102
93
struct plugin *next;
103
94
} plugin;
104
95
106
97
107
98
/* Gets an existing plugin based on name,
108
99
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
100
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
101
/* Check for exiting plugin with that name */
112
102
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
103
if((p->name == name)
114
104
or (p->name and name and (strcmp(p->name, name) == 0))){
116
106
}
117
107
}
118
108
/* 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);
109
plugin *new_plugin = malloc(sizeof(plugin));
123
110
if(new_plugin == NULL){
124
111
return NULL;
125
112
}
126
113
char *copy_name = NULL;
127
114
if(name != NULL){
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
115
copy_name = strdup(name);
131
116
if(copy_name == NULL){
132
int e = errno;
133
free(new_plugin);
134
errno = e;
135
117
return NULL;
136
118
}
137
119
}
138
120
139
*new_plugin = (plugin){ .name = copy_name,
140
.argc = 1,
141
.disabled = false,
142
.next = plugin_list };
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
143
125
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
126
new_plugin->argv = malloc(sizeof(char *) * 2);
147
127
if(new_plugin->argv == NULL){
148
int e = errno;
149
128
free(copy_name);
150
129
free(new_plugin);
151
errno = e;
152
130
return NULL;
153
131
}
154
132
new_plugin->argv[0] = copy_name;
155
133
new_plugin->argv[1] = NULL;
156
134
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
135
new_plugin->environ = malloc(sizeof(char *));
160
136
if(new_plugin->environ == NULL){
161
int e = errno;
162
137
free(copy_name);
163
138
free(new_plugin->argv);
164
139
free(new_plugin);
165
errno = e;
166
140
return NULL;
167
141
}
168
142
new_plugin->environ[0] = NULL;
173
147
}
174
148
175
149
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
150
static bool add_to_char_array(const char *new, char ***array,
178
151
int *len){
179
152
/* 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);
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
185
155
/* Malloc check */
186
if(new_array == NULL){
156
if(*array == NULL){
187
157
return false;
188
158
}
189
*array = new_array;
190
159
/* Make a copy of the new string */
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
160
char *copy = strdup(new);
195
161
if(copy == NULL){
196
162
return false;
197
163
}
204
170
}
205
171
206
172
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
208
173
static bool add_argument(plugin *p, const char *arg){
209
174
if(p == NULL){
210
175
return false;
213
178
}
214
179
215
180
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
217
181
static bool add_environment(plugin *p, const char *def, bool replace){
218
182
if(p == NULL){
219
183
return false;
221
185
/* namelen = length of name of environment variable */
222
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
187
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
226
190
/* It already exists */
227
191
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){
192
char *new = realloc(*e, strlen(def) + 1);
193
if(new == NULL){
233
194
return false;
234
195
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
196
*e = new;
197
strcpy(*e, def);
237
198
}
238
199
return true;
239
200
}
241
202
return add_to_char_array(def, &(p->environ), &(p->envc));
242
203
}
243
204
244
#ifndef O_CLOEXEC
245
205
/*
246
206
* Based on the example in the GNU LibC manual chapter 13.13 "File
247
207
* Descriptor Flags".
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
249
209
*/
250
__attribute__((warn_unused_result))
251
210
static int set_cloexec_flag(int fd){
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
int ret = fcntl(fd, F_GETFD, 0);
253
212
/* If reading the flags failed, return error indication now. */
254
213
if(ret < 0){
255
214
return ret;
256
215
}
257
216
/* Store modified flag word in the descriptor. */
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
260
218
}
261
#endif /* not O_CLOEXEC */
262
219
263
220
264
221
/* Mark processes as completed when they exit, and save their exit
265
222
status. */
266
223
static void handle_sigchld(__attribute__((unused)) int sig){
267
int old_errno = errno;
268
224
while(true){
269
225
plugin *proc = plugin_list;
270
226
int status;
274
230
break;
275
231
}
276
232
if(pid == -1){
277
if(errno == ECHILD){
278
/* No child processes */
279
break;
233
if(errno != ECHILD){
234
perror("waitpid");
280
235
}
281
error(0, errno, "waitpid");
236
/* No child processes */
237
break;
282
238
}
283
239
284
240
/* A child exited, find it in process_list */
290
246
continue;
291
247
}
292
248
proc->status = status;
293
proc->completed = 1;
249
proc->completed = true;
294
250
}
295
errno = old_errno;
296
251
}
297
252
298
253
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
300
254
static bool print_out_password(const char *buffer, size_t length){
301
255
ssize_t ret;
302
256
for(size_t written = 0; written < length; written += (size_t)ret){
310
264
}
311
265
312
266
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
314
267
static void free_plugin(plugin *plugin_node){
315
268
316
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
269
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
317
270
free(*arg);
318
271
}
319
free(plugin_node->name);
320
272
free(plugin_node->argv);
321
273
for(char **env = plugin_node->environ; *env != NULL; env++){
322
274
free(*env);
323
275
}
324
276
free(plugin_node->environ);
325
277
free(plugin_node->buffer);
326
278
327
279
/* Removes the plugin from the singly-linked list */
328
280
if(plugin_node == plugin_list){
329
281
/* First one - simple */
349
301
350
302
int main(int argc, char *argv[]){
351
303
char *plugindir = NULL;
352
char *pluginhelperdir = NULL;
353
304
char *argfile = NULL;
354
305
FILE *conffp;
355
struct dirent **direntries = NULL;
306
size_t d_name_len;
307
DIR *dir = NULL;
308
struct dirent *dirst;
356
309
struct stat st;
357
310
fd_set rfds_all;
358
311
int ret, maxfd = 0;
366
319
.sa_flags = SA_NOCLDSTOP };
367
320
char **custom_argv = NULL;
368
321
int custom_argc = 0;
369
int dir_fd = -1;
370
322
371
323
/* Establish a signal handler */
372
324
sigemptyset(&sigchld_action.sa_mask);
373
325
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
374
326
if(ret == -1){
375
error(0, errno, "sigaddset");
376
exitstatus = EX_OSERR;
327
perror("sigaddset");
328
exitstatus = EXIT_FAILURE;
377
329
goto fallback;
378
330
}
379
331
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
380
332
if(ret == -1){
381
error(0, errno, "sigaction");
382
exitstatus = EX_OSERR;
333
perror("sigaction");
334
exitstatus = EXIT_FAILURE;
383
335
goto fallback;
384
336
}
385
337
417
369
.doc = "Group ID the plugins will run as", .group = 3 },
418
370
{ .name = "debug", .key = 132,
419
371
.doc = "Debug mode", .group = 4 },
420
{ .name = "plugin-helper-dir", .key = 133,
421
.arg = "DIRECTORY",
422
.doc = "Specify a different plugin helper directory",
423
.group = 2 },
424
/*
425
* These reproduce what we would get without ARGP_NO_HELP
426
*/
427
{ .name = "help", .key = '?',
428
.doc = "Give this help list", .group = -1 },
429
{ .name = "usage", .key = -3,
430
.doc = "Give a short usage message", .group = -1 },
431
{ .name = "version", .key = 'V',
432
.doc = "Print program version", .group = -1 },
433
372
{ .name = NULL }
434
373
};
435
374
436
__attribute__((nonnull(3)))
437
error_t parse_opt(int key, char *arg, struct argp_state *state){
438
errno = 0;
439
switch(key){
440
char *tmp;
441
intmax_t tmp_id;
375
error_t parse_opt(int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
377
switch(key) {
442
378
case 'g': /* --global-options */
443
{
444
char *plugin_option;
445
while((plugin_option = strsep(&arg, ",")) != NULL){
446
if(not add_argument(getplugin(NULL), plugin_option)){
447
break;
379
if(arg != NULL){
380
char *p;
381
while((p = strsep(&arg, ",")) != NULL){
382
if(p[0] == '\0'){
383
continue;
384
}
385
if(not add_argument(getplugin(NULL), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
448
388
}
449
389
}
450
errno = 0;
451
390
}
452
391
break;
453
392
case 'G': /* --global-env */
454
if(add_environment(getplugin(NULL), arg, true)){
455
errno = 0;
393
if(arg == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
456
398
}
457
399
break;
458
400
case 'o': /* --options-for */
459
{
460
char *option_list = strchr(arg, ':');
461
if(option_list == NULL){
462
argp_error(state, "No colon in \"%s\"", arg);
463
errno = EINVAL;
464
break;
465
}
466
*option_list = '\0';
467
option_list++;
468
if(arg[0] == '\0'){
469
argp_error(state, "Empty plugin name");
470
errno = EINVAL;
471
break;
472
}
473
char *option;
474
while((option = strsep(&option_list, ",")) != NULL){
475
if(not add_argument(getplugin(arg), option)){
476
break;
477
}
478
}
479
errno = 0;
401
if(arg != NULL){
402
char *p_name = strsep(&arg, ":");
403
if(p_name[0] == '\0' or arg == NULL){
404
break;
405
}
406
char *opt = strsep(&arg, ":");
407
if(opt[0] == '\0' or opt == NULL){
408
break;
409
}
410
char *p;
411
while((p = strsep(&opt, ",")) != NULL){
412
if(p[0] == '\0'){
413
continue;
414
}
415
if(not add_argument(getplugin(p_name), p)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
418
}
419
}
480
420
}
481
421
break;
482
422
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
483
426
{
484
427
char *envdef = strchr(arg, ':');
485
428
if(envdef == NULL){
486
argp_error(state, "No colon in \"%s\"", arg);
487
errno = EINVAL;
488
429
break;
489
430
}
490
431
*envdef = '\0';
491
envdef++;
492
if(arg[0] == '\0'){
493
argp_error(state, "Empty plugin name");
494
errno = EINVAL;
495
break;
496
}
497
if(add_environment(getplugin(arg), envdef, true)){
498
errno = 0;
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
499
434
}
500
435
}
501
436
break;
502
437
case 'd': /* --disable */
503
{
438
if(arg != NULL){
504
439
plugin *p = getplugin(arg);
505
if(p != NULL){
506
p->disabled = true;
507
errno = 0;
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
508
442
}
443
p->disabled = true;
509
444
}
510
445
break;
511
446
case 'e': /* --enable */
512
{
447
if(arg != NULL){
513
448
plugin *p = getplugin(arg);
514
if(p != NULL){
515
p->disabled = false;
516
errno = 0;
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
517
451
}
452
p->disabled = false;
518
453
}
519
454
break;
520
455
case 128: /* --plugin-dir */
521
456
free(plugindir);
522
457
plugindir = strdup(arg);
523
if(plugindir != NULL){
524
errno = 0;
525
}
458
if(plugindir == NULL){
459
perror("strdup");
460
}
526
461
break;
527
462
case 129: /* --config-file */
528
463
/* This is already done by parse_opt_config_file() */
529
464
break;
530
465
case 130: /* --userid */
531
tmp_id = strtoimax(arg, &tmp, 10);
532
if(errno != 0 or tmp == arg or *tmp != '\0'
533
or tmp_id != (uid_t)tmp_id){
534
argp_error(state, "Bad user ID number: \"%s\", using %"
535
PRIdMAX, arg, (intmax_t)uid);
536
break;
466
/* In the GNU C library, uid_t is always unsigned int */
467
ret = sscanf(arg, "%u", &uid);
468
if(ret != 1){
469
fprintf(stderr, "Bad user ID number: \"%s\", using %u\n", arg,
470
uid);
537
471
}
538
uid = (uid_t)tmp_id;
539
errno = 0;
540
472
break;
541
473
case 131: /* --groupid */
542
tmp_id = strtoimax(arg, &tmp, 10);
543
if(errno != 0 or tmp == arg or *tmp != '\0'
544
or tmp_id != (gid_t)tmp_id){
545
argp_error(state, "Bad group ID number: \"%s\", using %"
546
PRIdMAX, arg, (intmax_t)gid);
547
break;
474
/* In the GNU C library, gid_t is always unsigned int */
475
ret = sscanf(arg, "%u", &gid);
476
if(ret != 1){
477
fprintf(stderr, "Bad group ID number: \"%s\", using %u\n",
478
arg, gid);
548
479
}
549
gid = (gid_t)tmp_id;
550
errno = 0;
551
480
break;
552
481
case 132: /* --debug */
553
482
debug = true;
554
483
break;
555
case 133: /* --plugin-helper-dir */
556
free(pluginhelperdir);
557
pluginhelperdir = strdup(arg);
558
if(pluginhelperdir != NULL){
559
errno = 0;
560
}
561
break;
562
/*
563
* These reproduce what we would get without ARGP_NO_HELP
564
*/
565
case '?': /* --help */
566
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
567
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
568
__builtin_unreachable();
569
case -3: /* --usage */
570
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
571
argp_state_help(state, state->out_stream,
572
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
573
__builtin_unreachable();
574
case 'V': /* --version */
575
fprintf(state->out_stream, "%s\n", argp_program_version);
576
exit(EXIT_SUCCESS);
577
break;
578
484
/*
579
485
* When adding more options before this line, remember to also add a
580
486
* "case" to the "parse_opt_config_file" function below.
583
489
/* Cryptsetup always passes an argument, which is an empty
584
490
string if "none" was specified in /etc/crypttab. So if
585
491
argument was empty, we ignore it silently. */
586
if(arg[0] == '\0'){
587
break;
492
if(arg[0] != '\0'){
493
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
588
494
}
589
#if __GNUC__ >= 7
590
__attribute__((fallthrough));
591
#else
592
/* FALLTHROUGH */
593
#endif
495
break;
496
case ARGP_KEY_END:
497
break;
594
498
default:
595
499
return ARGP_ERR_UNKNOWN;
596
500
}
597
return errno; /* Set to 0 at start */
501
return 0;
598
502
}
599
503
600
504
/* This option parser is the same as parse_opt() above, except it
601
505
ignores everything but the --config-file option. */
602
506
error_t parse_opt_config_file(int key, char *arg,
603
507
__attribute__((unused))
604
struct argp_state *state){
605
errno = 0;
606
switch(key){
508
struct argp_state *state) {
509
switch(key) {
607
510
case 'g': /* --global-options */
608
511
case 'G': /* --global-env */
609
512
case 'o': /* --options-for */
615
518
case 129: /* --config-file */
616
519
free(argfile);
617
520
argfile = strdup(arg);
618
if(argfile != NULL){
619
errno = 0;
521
if(argfile == NULL){
522
perror("strdup");
620
523
}
621
break;
524
break;
622
525
case 130: /* --userid */
623
526
case 131: /* --groupid */
624
527
case 132: /* --debug */
625
case 133: /* --plugin-helper-dir */
626
case '?': /* --help */
627
case -3: /* --usage */
628
case 'V': /* --version */
629
528
case ARGP_KEY_ARG:
529
case ARGP_KEY_END:
630
530
break;
631
531
default:
632
532
return ARGP_ERR_UNKNOWN;
633
533
}
634
return errno;
534
return 0;
635
535
}
636
536
637
537
struct argp argp = { .options = options,
641
541
642
542
/* Parse using parse_opt_config_file() in order to get the custom
643
543
config file location, if any. */
644
ret = argp_parse(&argp, argc, argv,
645
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
646
NULL, NULL);
647
switch(ret){
648
case 0:
649
break;
650
case ENOMEM:
651
default:
652
errno = ret;
653
error(0, errno, "argp_parse");
654
exitstatus = EX_OSERR;
655
goto fallback;
656
case EINVAL:
657
exitstatus = EX_USAGE;
544
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
545
if(ret == ARGP_ERR_UNKNOWN){
546
fprintf(stderr, "Unknown error while parsing arguments\n");
547
exitstatus = EXIT_FAILURE;
658
548
goto fallback;
659
549
}
660
550
666
556
conffp = fopen(AFILE, "r");
667
557
} else {
668
558
conffp = fopen(argfile, "r");
669
}
559
}
670
560
if(conffp != NULL){
671
561
char *org_line = NULL;
672
562
char *p, *arg, *new_arg, *line;
673
563
size_t size = 0;
674
564
const char whitespace_delims[] = " \r\t\f\v\n";
675
565
const char comment_delim[] = "#";
676
566
677
567
custom_argc = 1;
678
568
custom_argv = malloc(sizeof(char*) * 2);
679
569
if(custom_argv == NULL){
680
error(0, errno, "malloc");
681
exitstatus = EX_OSERR;
570
perror("malloc");
571
exitstatus = EXIT_FAILURE;
682
572
goto fallback;
683
573
}
684
574
custom_argv[0] = argv[0];
685
575
custom_argv[1] = NULL;
686
576
687
577
/* for each line in the config file, strip whitespace and ignore
688
578
commented text */
689
579
while(true){
691
581
if(sret == -1){
692
582
break;
693
583
}
694
584
695
585
line = org_line;
696
586
arg = strsep(&line, comment_delim);
697
587
while((p = strsep(&arg, whitespace_delims)) != NULL){
700
590
}
701
591
new_arg = strdup(p);
702
592
if(new_arg == NULL){
703
error(0, errno, "strdup");
704
exitstatus = EX_OSERR;
593
perror("strdup");
594
exitstatus = EXIT_FAILURE;
705
595
free(org_line);
706
596
goto fallback;
707
597
}
708
598
709
599
custom_argc += 1;
710
{
711
char **new_argv = realloc(custom_argv, sizeof(char *)
712
* ((size_t)custom_argc + 1));
713
if(new_argv == NULL){
714
error(0, errno, "realloc");
715
exitstatus = EX_OSERR;
716
free(new_arg);
717
free(org_line);
718
goto fallback;
719
} else {
720
custom_argv = new_argv;
721
}
600
custom_argv = realloc(custom_argv, sizeof(char *)
601
* ((unsigned int) custom_argc + 1));
602
if(custom_argv == NULL){
603
perror("realloc");
604
exitstatus = EXIT_FAILURE;
605
free(org_line);
606
goto fallback;
722
607
}
723
608
custom_argv[custom_argc-1] = new_arg;
724
custom_argv[custom_argc] = NULL;
609
custom_argv[custom_argc] = NULL;
725
610
}
726
611
}
727
do {
728
ret = fclose(conffp);
729
} while(ret == EOF and errno == EINTR);
730
if(ret == EOF){
731
error(0, errno, "fclose");
732
exitstatus = EX_IOERR;
733
goto fallback;
734
}
735
612
free(org_line);
736
613
} else {
737
614
/* Check for harmful errors and go to fallback. Other errors might
738
615
not affect opening plugins */
739
616
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
740
error(0, errno, "fopen");
741
exitstatus = EX_OSERR;
617
perror("fopen");
618
exitstatus = EXIT_FAILURE;
742
619
goto fallback;
743
620
}
744
621
}
745
/* If there were any arguments from the configuration file, pass
746
them to parser as command line arguments */
622
/* If there was any arguments from configuration file,
623
pass them to parser as command arguments */
747
624
if(custom_argv != NULL){
748
ret = argp_parse(&argp, custom_argc, custom_argv,
749
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
750
NULL, NULL);
751
switch(ret){
752
case 0:
753
break;
754
case ENOMEM:
755
default:
756
errno = ret;
757
error(0, errno, "argp_parse");
758
exitstatus = EX_OSERR;
759
goto fallback;
760
case EINVAL:
761
exitstatus = EX_CONFIG;
625
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
626
0, NULL);
627
if(ret == ARGP_ERR_UNKNOWN){
628
fprintf(stderr, "Unknown error while parsing arguments\n");
629
exitstatus = EXIT_FAILURE;
762
630
goto fallback;
763
631
}
764
632
}
765
633
766
634
/* Parse actual command line arguments, to let them override the
767
635
config file */
768
ret = argp_parse(&argp, argc, argv,
769
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
770
NULL, NULL);
771
switch(ret){
772
case 0:
773
break;
774
case ENOMEM:
775
default:
776
errno = ret;
777
error(0, errno, "argp_parse");
778
exitstatus = EX_OSERR;
779
goto fallback;
780
case EINVAL:
781
exitstatus = EX_USAGE;
782
goto fallback;
783
}
784
785
{
786
char *pluginhelperenv;
787
bool bret = true;
788
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
if(ret != -1){
791
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
792
}
793
if(ret == -1 or not bret){
794
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
795
" environment variable to \"%s\" for all plugins\n",
796
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
797
}
798
if(ret != -1){
799
free(pluginhelperenv);
800
}
636
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
637
if(ret == ARGP_ERR_UNKNOWN){
638
fprintf(stderr, "Unknown error while parsing arguments\n");
639
exitstatus = EXIT_FAILURE;
640
goto fallback;
801
641
}
802
642
803
643
if(debug){
804
for(plugin *p = plugin_list; p != NULL; p = p->next){
644
for(plugin *p = plugin_list; p != NULL; p=p->next){
805
645
fprintf(stderr, "Plugin: %s has %d arguments\n",
806
646
p->name ? p->name : "Global", p->argc - 1);
807
647
for(char **a = p->argv; *a != NULL; a++){
808
648
fprintf(stderr, "\tArg: %s\n", *a);
809
649
}
810
fprintf(stderr, "...and %d environment variables\n", p->envc);
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
811
651
for(char **a = p->environ; *a != NULL; a++){
812
652
fprintf(stderr, "\t%s\n", *a);
813
653
}
814
654
}
815
655
}
816
656
817
if(getuid() == 0){
818
/* Work around Debian bug #633582:
819
<https://bugs.debian.org/633582> */
820
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
821
if(plugindir_fd == -1){
822
if(errno != ENOENT){
823
error(0, errno, "open(\"" PDIR "\")");
824
}
825
} else {
826
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
827
if(ret == -1){
828
error(0, errno, "fstat");
829
} else {
830
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
831
ret = fchown(plugindir_fd, uid, gid);
832
if(ret == -1){
833
error(0, errno, "fchown");
834
}
835
}
836
}
837
close(plugindir_fd);
838
}
839
}
840
841
/* Lower permissions */
842
ret = setgid(gid);
843
if(ret == -1){
844
error(0, errno, "setgid");
845
}
657
/* Strip permissions down to nobody */
846
658
ret = setuid(uid);
847
659
if(ret == -1){
848
error(0, errno, "setuid");
849
}
850
851
/* Open plugin directory with close_on_exec flag */
660
perror("setuid");
661
}
662
setgid(gid);
663
if(ret == -1){
664
perror("setgid");
665
}
666
667
if(plugindir == NULL){
668
dir = opendir(PDIR);
669
} else {
670
dir = opendir(plugindir);
671
}
672
673
if(dir == NULL){
674
perror("Could not open plugin dir");
675
exitstatus = EXIT_FAILURE;
676
goto fallback;
677
}
678
679
/* Set the FD_CLOEXEC flag on the directory, if possible */
852
680
{
853
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
854
#ifdef O_CLOEXEC
855
O_CLOEXEC
856
#else /* not O_CLOEXEC */
857
0
858
#endif /* not O_CLOEXEC */
859
);
860
if(dir_fd == -1){
861
error(0, errno, "Could not open plugin dir");
862
exitstatus = EX_UNAVAILABLE;
863
goto fallback;
864
}
865
866
#ifndef O_CLOEXEC
867
/* Set the FD_CLOEXEC flag on the directory */
868
ret = set_cloexec_flag(dir_fd);
869
if(ret < 0){
870
error(0, errno, "set_cloexec_flag");
871
exitstatus = EX_OSERR;
872
goto fallback;
873
}
874
#endif /* O_CLOEXEC */
875
}
876
877
int good_name(const struct dirent * const dirent){
878
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
879
"*.dpkg-old", "*.dpkg-bak",
880
"*.dpkg-divert", NULL };
881
#ifdef __GNUC__
882
#pragma GCC diagnostic push
883
#pragma GCC diagnostic ignored "-Wcast-qual"
884
#endif
885
for(const char **pat = (const char **)patterns;
886
*pat != NULL; pat++){
887
#ifdef __GNUC__
888
#pragma GCC diagnostic pop
889
#endif
890
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
891
!= FNM_NOMATCH){
892
if(debug){
893
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
894
" matching pattern %s\n", dirent->d_name, *pat);
895
}
896
return 0;
681
int dir_fd = dirfd(dir);
682
if(dir_fd >= 0){
683
ret = set_cloexec_flag(dir_fd);
684
if(ret < 0){
685
perror("set_cloexec_flag");
686
exitstatus = EXIT_FAILURE;
687
goto fallback;
897
688
}
898
689
}
899
return 1;
900
}
901
902
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
903
alphasort);
904
if(numplugins == -1){
905
error(0, errno, "Could not scan plugin dir");
906
direntries = NULL;
907
exitstatus = EX_OSERR;
908
goto fallback;
909
690
}
910
691
911
692
FD_ZERO(&rfds_all);
912
693
913
694
/* Read and execute any executable in the plugin directory*/
914
for(int i = 0; i < numplugins; i++){
915
916
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
917
if(plugin_fd == -1){
918
error(0, errno, "Could not open plugin");
919
free(direntries[i]);
695
while(true){
696
dirst = readdir(dir);
697
698
/* All directory entries have been processed */
699
if(dirst == NULL){
700
if(errno == EBADF){
701
perror("readdir");
702
exitstatus = EXIT_FAILURE;
703
goto fallback;
704
}
705
break;
706
}
707
708
d_name_len = strlen(dirst->d_name);
709
710
/* Ignore dotfiles, backup files and other junk */
711
{
712
bool bad_name = false;
713
714
const char const *bad_prefixes[] = { ".", "#", NULL };
715
716
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
717
".dpkg-old",
718
".dpkg-bak",
719
".dpkg-divert", NULL };
720
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
721
size_t pre_len = strlen(*pre);
722
if((d_name_len >= pre_len)
723
and strncmp((dirst->d_name), *pre, pre_len) == 0){
724
if(debug){
725
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
726
" with bad prefix %s\n", dirst->d_name, *pre);
727
}
728
bad_name = true;
729
break;
730
}
731
}
732
if(bad_name){
733
continue;
734
}
735
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
736
size_t suf_len = strlen(*suf);
737
if((d_name_len >= suf_len)
738
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
739
== 0)){
740
if(debug){
741
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
742
" with bad suffix %s\n", dirst->d_name, *suf);
743
}
744
bad_name = true;
745
break;
746
}
747
}
748
749
if(bad_name){
750
continue;
751
}
752
}
753
754
char *filename;
755
if(plugindir == NULL){
756
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
757
} else {
758
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
759
}
760
if(ret < 0){
761
perror("asprintf");
920
762
continue;
921
763
}
922
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
764
765
ret = stat(filename, &st);
923
766
if(ret == -1){
924
error(0, errno, "stat");
925
close(plugin_fd);
926
free(direntries[i]);
767
perror("stat");
768
free(filename);
927
769
continue;
928
770
}
929
771
930
772
/* Ignore non-executable files */
931
if(not S_ISREG(st.st_mode)
932
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
933
X_OK, 0)) != 0)){
773
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
934
774
if(debug){
935
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
936
" with bad type or mode\n",
937
plugindir != NULL ? plugindir : PDIR,
938
direntries[i]->d_name);
775
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
776
" with bad type or mode\n", filename);
939
777
}
940
close(plugin_fd);
941
free(direntries[i]);
778
free(filename);
942
779
continue;
943
780
}
944
781
945
plugin *p = getplugin(direntries[i]->d_name);
782
plugin *p = getplugin(dirst->d_name);
946
783
if(p == NULL){
947
error(0, errno, "getplugin");
948
close(plugin_fd);
949
free(direntries[i]);
784
perror("getplugin");
785
free(filename);
950
786
continue;
951
787
}
952
788
if(p->disabled){
953
789
if(debug){
954
790
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
955
direntries[i]->d_name);
791
dirst->d_name);
956
792
}
957
close(plugin_fd);
958
free(direntries[i]);
793
free(filename);
959
794
continue;
960
795
}
961
796
{
964
799
if(g != NULL){
965
800
for(char **a = g->argv + 1; *a != NULL; a++){
966
801
if(not add_argument(p, *a)){
967
error(0, errno, "add_argument");
802
perror("add_argument");
968
803
}
969
804
}
970
805
/* Add global environment variables */
971
806
for(char **e = g->environ; *e != NULL; e++){
972
807
if(not add_environment(p, *e, false)){
973
error(0, errno, "add_environment");
808
perror("add_environment");
974
809
}
975
810
}
976
811
}
977
812
}
978
/* If this plugin has any environment variables, we need to
979
duplicate the environment from this process, too. */
813
/* If this plugin has any environment variables, we will call
814
using execve and need to duplicate the environment from this
815
process, too. */
980
816
if(p->environ[0] != NULL){
981
817
for(char **e = environ; *e != NULL; e++){
982
818
if(not add_environment(p, *e, false)){
983
error(0, errno, "add_environment");
819
perror("add_environment");
984
820
}
985
821
}
986
822
}
987
823
988
824
int pipefd[2];
989
#ifndef O_CLOEXEC
990
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
991
#else /* O_CLOEXEC */
992
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
993
#endif /* O_CLOEXEC */
825
ret = pipe(pipefd);
994
826
if(ret == -1){
995
error(0, errno, "pipe");
996
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
goto fallback;
999
}
1000
if(pipefd[0] >= FD_SETSIZE){
1001
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1002
FD_SETSIZE);
1003
close(pipefd[0]);
1004
close(pipefd[1]);
1005
exitstatus = EX_OSERR;
1006
free(direntries[i]);
1007
goto fallback;
1008
}
1009
#ifndef O_CLOEXEC
827
perror("pipe");
828
exitstatus = EXIT_FAILURE;
829
goto fallback;
830
}
1010
831
/* Ask OS to automatic close the pipe on exec */
1011
832
ret = set_cloexec_flag(pipefd[0]);
1012
833
if(ret < 0){
1013
error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
834
perror("set_cloexec_flag");
835
exitstatus = EXIT_FAILURE;
1018
836
goto fallback;
1019
837
}
1020
838
ret = set_cloexec_flag(pipefd[1]);
1021
839
if(ret < 0){
1022
error(0, errno, "set_cloexec_flag");
1023
close(pipefd[0]);
1024
close(pipefd[1]);
1025
exitstatus = EX_OSERR;
1026
free(direntries[i]);
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1027
842
goto fallback;
1028
843
}
1029
#endif /* not O_CLOEXEC */
1030
844
/* Block SIGCHLD until process is safely in process list */
1031
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1032
&sigchld_action.sa_mask,
1033
NULL));
845
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1034
846
if(ret < 0){
1035
error(0, errno, "sigprocmask");
1036
exitstatus = EX_OSERR;
1037
free(direntries[i]);
847
perror("sigprocmask");
848
exitstatus = EXIT_FAILURE;
1038
849
goto fallback;
1039
850
}
1040
851
/* Starting a new process to be watched */
1041
pid_t pid;
1042
do {
1043
pid = fork();
1044
} while(pid == -1 and errno == EINTR);
852
pid_t pid = fork();
1045
853
if(pid == -1){
1046
error(0, errno, "fork");
1047
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1048
&sigchld_action.sa_mask, NULL));
1049
close(pipefd[0]);
1050
close(pipefd[1]);
1051
exitstatus = EX_OSERR;
1052
free(direntries[i]);
854
perror("fork");
855
exitstatus = EXIT_FAILURE;
1053
856
goto fallback;
1054
857
}
1055
858
if(pid == 0){
1056
859
/* this is the child process */
1057
860
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1058
861
if(ret < 0){
1059
error(0, errno, "sigaction");
1060
_exit(EX_OSERR);
862
perror("sigaction");
863
_exit(EXIT_FAILURE);
1061
864
}
1062
865
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1063
866
if(ret < 0){
1064
error(0, errno, "sigprocmask");
1065
_exit(EX_OSERR);
867
perror("sigprocmask");
868
_exit(EXIT_FAILURE);
1066
869
}
1067
870
1068
871
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1069
872
if(ret == -1){
1070
error(0, errno, "dup2");
1071
_exit(EX_OSERR);
873
perror("dup2");
874
_exit(EXIT_FAILURE);
1072
875
}
1073
876
1074
if(fexecve(plugin_fd, p->argv,
1075
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1076
error(0, errno, "fexecve for %s/%s",
1077
plugindir != NULL ? plugindir : PDIR,
1078
direntries[i]->d_name);
1079
_exit(EX_OSERR);
877
if(dirfd(dir) < 0){
878
/* If dir has no file descriptor, we could not set FD_CLOEXEC
879
above and must now close it manually here. */
880
closedir(dir);
881
}
882
if(p->environ[0] == NULL){
883
if(execv(filename, p->argv) < 0){
884
perror("execv");
885
_exit(EXIT_FAILURE);
886
}
887
} else {
888
if(execve(filename, p->argv, p->environ) < 0){
889
perror("execve");
890
_exit(EXIT_FAILURE);
891
}
1080
892
}
1081
893
/* no return */
1082
894
}
1083
895
/* Parent process */
1084
896
close(pipefd[1]); /* Close unused write end of pipe */
1085
close(plugin_fd);
1086
plugin *new_plugin = getplugin(direntries[i]->d_name);
897
free(filename);
898
plugin *new_plugin = getplugin(dirst->d_name);
1087
899
if(new_plugin == NULL){
1088
error(0, errno, "getplugin");
1089
ret = (int)(TEMP_FAILURE_RETRY
1090
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1091
NULL)));
900
perror("getplugin");
901
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1092
902
if(ret < 0){
1093
error(0, errno, "sigprocmask");
903
perror("sigprocmask");
1094
904
}
1095
exitstatus = EX_OSERR;
1096
free(direntries[i]);
905
exitstatus = EXIT_FAILURE;
1097
906
goto fallback;
1098
907
}
1099
free(direntries[i]);
1100
908
1101
909
new_plugin->pid = pid;
1102
910
new_plugin->fd = pipefd[0];
1103
1104
if(debug){
1105
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1106
new_plugin->name, (intmax_t) (new_plugin->pid));
1107
}
1108
911
1109
912
/* Unblock SIGCHLD so signal handler can be run if this process
1110
913
has already completed */
1111
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1112
&sigchld_action.sa_mask,
1113
NULL));
914
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1114
915
if(ret < 0){
1115
error(0, errno, "sigprocmask");
1116
exitstatus = EX_OSERR;
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1117
918
goto fallback;
1118
919
}
1119
920
1124
925
}
1125
926
}
1126
927
1127
free(direntries);
1128
direntries = NULL;
1129
close(dir_fd);
1130
dir_fd = -1;
1131
free_plugin(getplugin(NULL));
928
closedir(dir);
929
dir = NULL;
1132
930
1133
931
for(plugin *p = plugin_list; p != NULL; p = p->next){
1134
932
if(p->pid != 0){
1145
943
while(plugin_list){
1146
944
fd_set rfds = rfds_all;
1147
945
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1148
if(select_ret == -1 and errno != EINTR){
1149
error(0, errno, "select");
1150
exitstatus = EX_OSERR;
946
if(select_ret == -1){
947
perror("select");
948
exitstatus = EXIT_FAILURE;
1151
949
goto fallback;
1152
950
}
1153
951
/* OK, now either a process completed, or something can be read
1154
952
from one of them */
1155
953
for(plugin *proc = plugin_list; proc != NULL;){
1156
954
/* Is this process completely done? */
1157
if(proc->completed and proc->eof){
955
if(proc->eof and proc->completed){
1158
956
/* Only accept the plugin output if it exited cleanly */
1159
957
if(not WIFEXITED(proc->status)
1160
958
or WEXITSTATUS(proc->status) != 0){
1161
959
/* Bad exit by plugin */
1162
960
1163
961
if(debug){
1164
962
if(WIFEXITED(proc->status)){
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1166
" status %d\n", proc->name,
1167
(intmax_t) (proc->pid),
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
1168
965
WEXITSTATUS(proc->status));
1169
} else if(WIFSIGNALED(proc->status)){
1170
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1171
" signal %d: %s\n", proc->name,
1172
(intmax_t) (proc->pid),
1173
WTERMSIG(proc->status),
1174
strsignal(WTERMSIG(proc->status)));
966
} else if(WIFSIGNALED(proc->status)) {
967
fprintf(stderr, "Plugin %u killed by signal %d\n",
968
(unsigned int) (proc->pid),
969
WTERMSIG(proc->status));
970
} else if(WCOREDUMP(proc->status)){
971
fprintf(stderr, "Plugin %u dumped core\n",
972
(unsigned int) (proc->pid));
1175
973
}
1176
974
}
1177
975
1178
976
/* Remove the plugin */
1179
977
FD_CLR(proc->fd, &rfds_all);
1180
978
1181
979
/* Block signal while modifying process_list */
1182
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1183
(SIG_BLOCK,
1184
&sigchld_action.sa_mask,
1185
NULL));
980
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1186
981
if(ret < 0){
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
982
perror("sigprocmask");
983
exitstatus = EXIT_FAILURE;
1189
984
goto fallback;
1190
985
}
1191
986
1194
989
proc = next_plugin;
1195
990
1196
991
/* We are done modifying process list, so unblock signal */
1197
ret = (int)(TEMP_FAILURE_RETRY
1198
(sigprocmask(SIG_UNBLOCK,
1199
&sigchld_action.sa_mask, NULL)));
992
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
993
NULL);
1200
994
if(ret < 0){
1201
error(0, errno, "sigprocmask");
1202
exitstatus = EX_OSERR;
995
perror("sigprocmask");
996
exitstatus = EXIT_FAILURE;
1203
997
goto fallback;
1204
998
}
1205
999
1215
1009
bool bret = print_out_password(proc->buffer,
1216
1010
proc->buffer_length);
1217
1011
if(not bret){
1218
error(0, errno, "print_out_password");
1219
exitstatus = EX_IOERR;
1012
perror("print_out_password");
1013
exitstatus = EXIT_FAILURE;
1220
1014
}
1221
1015
goto fallback;
1222
1016
}
1229
1023
}
1230
1024
/* Before reading, make the process' data buffer large enough */
1231
1025
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1232
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1233
+ (size_t) BUFFER_SIZE);
1234
if(new_buffer == NULL){
1235
error(0, errno, "malloc");
1236
exitstatus = EX_OSERR;
1026
proc->buffer = realloc(proc->buffer, proc->buffer_size
1027
+ (size_t) BUFFER_SIZE);
1028
if(proc->buffer == NULL){
1029
perror("malloc");
1030
exitstatus = EXIT_FAILURE;
1237
1031
goto fallback;
1238
1032
}
1239
proc->buffer = new_buffer;
1240
1033
proc->buffer_size += BUFFER_SIZE;
1241
1034
}
1242
1035
/* Read from the process */
1243
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1244
proc->buffer
1245
+ proc->buffer_length,
1246
BUFFER_SIZE));
1036
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1037
BUFFER_SIZE);
1247
1038
if(sret < 0){
1248
1039
/* Read error from this process; ignore the error */
1249
1040
proc = proc->next;
1257
1048
}
1258
1049
}
1259
1050
}
1260
1261
1051
1052
1262
1053
fallback:
1263
1054
1264
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1265
and exitstatus != EX_OK)){
1055
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1266
1056
/* Fallback if all plugins failed, none are found or an error
1267
1057
occured */
1268
1058
bool bret;
1276
1066
}
1277
1067
bret = print_out_password(passwordbuffer, len);
1278
1068
if(not bret){
1279
error(0, errno, "print_out_password");
1280
exitstatus = EX_IOERR;
1069
perror("print_out_password");
1070
exitstatus = EXIT_FAILURE;
1281
1071
}
1282
1072
}
1283
1073
1284
1074
/* Restore old signal handler */
1285
1075
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1286
1076
if(ret == -1){
1287
error(0, errno, "sigaction");
1288
exitstatus = EX_OSERR;
1077
perror("sigaction");
1078
exitstatus = EXIT_FAILURE;
1289
1079
}
1290
1080
1291
1081
if(custom_argv != NULL){
1295
1085
free(custom_argv);
1296
1086
}
1297
1087
1298
free(direntries);
1299
1300
if(dir_fd != -1){
1301
close(dir_fd);
1088
if(dir != NULL){
1089
closedir(dir);
1302
1090
}
1303
1091
1304
1092
/* Kill the processes */
1308
1096
ret = kill(p->pid, SIGTERM);
1309
1097
if(ret == -1 and errno != ESRCH){
1310
1098
/* Set-uid proccesses might not get closed */
1311
error(0, errno, "kill");
1099
perror("kill");
1312
1100
}
1313
1101
}
1314
1102
}
1315
1103
1316
1104
/* Wait for any remaining child processes to terminate */
1317
do {
1105
do{
1318
1106
ret = wait(NULL);
1319
1107
} while(ret >= 0);
1320
1108
if(errno != ECHILD){
1321
error(0, errno, "wait");
1109
perror("wait");
1322
1110
}
1323
1111
1324
1112
free_plugin_list();
1325
1113
1326
1114
free(plugindir);
1327
free(pluginhelperdir);
1328
1115
free(argfile);
1329
1116
1330
1117
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0