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- Committer: Teddy Hogeborn
- Date: 2015-07-20 03:03:33 UTC
- Revision ID: teddy@recompile.se-20150720030333-203m2aeblypcsfte
Bug fix for GnuTLS 3: be compatible with old 2048-bit DSA keys.
The mandos-keygen program in Mandos version 1.6.0 and older generated
2048-bit DSA keys, and when GnuTLS uses these it has trouble
connecting using the Mandos default priority string. This was
previously fixed in Mandos 1.6.2, but the bug reappeared when using
GnuTLS 3, so the default priority string has to change again; this
time also the Mandos client has to change its default, so now the
server and the client should use the same default priority string:
SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256
* mandos (main/server_defaults): Changed default priority string.
* mandos-options.xml (/section/para[id="priority_compat"]): Removed.
(/section/para[id="priority"]): Changed default priority string.
* mandos.conf ([DEFAULT]/priority): - '' -
* mandos.conf.xml (OPTIONS/priority): Refer to the id "priority"
instead of "priority_compat".
* mandos.xml (OPTIONS/--priority): - '' -
* plugins.d/mandos-client.c (main): Changed default priority string.
The mandos-keygen program in Mandos version 1.6.0 and older generated
2048-bit DSA keys, and when GnuTLS uses these it has trouble
connecting using the Mandos default priority string. This was
previously fixed in Mandos 1.6.2, but the bug reappeared when using
GnuTLS 3, so the default priority string has to change again; this
time also the Mandos client has to change its default, so now the
server and the client should use the same default priority string:
SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA:+SIGN-DSA-SHA256
* mandos (main/server_defaults): Changed default priority string.
* mandos-options.xml (/section/para[id="priority_compat"]): Removed.
(/section/para[id="priority"]): Changed default priority string.
* mandos.conf ([DEFAULT]/priority): - '' -
* mandos.conf.xml (OPTIONS/priority): Refer to the id "priority"
instead of "priority_compat".
* mandos.xml (OPTIONS/--priority): - '' -
* plugins.d/mandos-client.c (main): Changed default priority string.
- 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
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
26
O_CLOEXEC, pipe2() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
30
30
#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() */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
36
getgid() */
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
40
WEXITSTATUS(), WTERMSIG(),
41
WCOREDUMP() */
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;
89
97
size_t buffer_size;
90
98
size_t buffer_length;
91
99
bool eof;
92
volatile bool completed;
93
volatile int status;
100
volatile sig_atomic_t completed;
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;
133
free(new_plugin);
134
errno = e;
118
135
return NULL;
119
136
}
120
137
}
121
138
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
139
*new_plugin = (plugin){ .name = copy_name,
140
.argc = 1,
141
.disabled = false,
142
.next = plugin_list };
126
143
127
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);
128
147
if(new_plugin->argv == NULL){
148
int e = errno;
129
149
free(copy_name);
130
150
free(new_plugin);
151
errno = e;
131
152
return NULL;
132
153
}
133
154
new_plugin->argv[0] = copy_name;
134
155
new_plugin->argv[1] = NULL;
135
156
136
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
137
160
if(new_plugin->environ == NULL){
161
int e = errno;
138
162
free(copy_name);
139
163
free(new_plugin->argv);
140
164
free(new_plugin);
165
errno = e;
141
166
return NULL;
142
167
}
143
168
new_plugin->environ[0] = NULL;
148
173
}
149
174
150
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
151
177
static bool add_to_char_array(const char *new, char ***array,
152
178
int *len){
153
179
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (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);
156
185
/* Malloc check */
157
if(*array == NULL){
186
if(new_array == NULL){
158
187
return false;
159
188
}
189
*array = new_array;
160
190
/* Make a copy of the new string */
161
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
162
195
if(copy == NULL){
163
196
return false;
164
197
}
171
204
}
172
205
173
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
174
208
static bool add_argument(plugin *p, const char *arg){
175
209
if(p == NULL){
176
210
return false;
179
213
}
180
214
181
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
182
217
static bool add_environment(plugin *p, const char *def, bool replace){
183
218
if(p == NULL){
184
219
return false;
186
221
/* namelen = length of name of environment variable */
187
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
223
/* Search for this environment variable */
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
191
226
/* It already exists */
192
227
if(replace){
193
char *new = realloc(*e, strlen(def) + 1);
194
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){
195
233
return false;
196
234
}
197
*e = new;
198
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
199
237
}
200
238
return true;
201
239
}
203
241
return add_to_char_array(def, &(p->environ), &(p->envc));
204
242
}
205
243
244
#ifndef O_CLOEXEC
206
245
/*
207
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
247
* Descriptor Flags".
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
210
249
*/
250
__attribute__((warn_unused_result))
211
251
static int set_cloexec_flag(int fd){
212
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
213
253
/* If reading the flags failed, return error indication now. */
214
254
if(ret < 0){
215
255
return ret;
216
256
}
217
257
/* Store modified flag word in the descriptor. */
218
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
219
260
}
261
#endif /* not O_CLOEXEC */
220
262
221
263
222
264
/* Mark processes as completed when they exit, and save their exit
223
265
status. */
224
266
static void handle_sigchld(__attribute__((unused)) int sig){
267
int old_errno = errno;
225
268
while(true){
226
269
plugin *proc = plugin_list;
227
270
int status;
231
274
break;
232
275
}
233
276
if(pid == -1){
234
if(errno != ECHILD){
235
perror("waitpid");
277
if(errno == ECHILD){
278
/* No child processes */
279
break;
236
280
}
237
/* No child processes */
238
break;
281
error(0, errno, "waitpid");
239
282
}
240
283
241
284
/* A child exited, find it in process_list */
247
290
continue;
248
291
}
249
292
proc->status = status;
250
proc->completed = true;
293
proc->completed = 1;
251
294
}
295
errno = old_errno;
252
296
}
253
297
254
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
255
300
static bool print_out_password(const char *buffer, size_t length){
256
301
ssize_t ret;
257
302
for(size_t written = 0; written < length; written += (size_t)ret){
265
310
}
266
311
267
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
268
314
static void free_plugin(plugin *plugin_node){
269
315
270
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
276
322
}
277
323
free(plugin_node->environ);
278
324
free(plugin_node->buffer);
279
325
280
326
/* Removes the plugin from the singly-linked list */
281
327
if(plugin_node == plugin_list){
282
328
/* First one - simple */
302
348
303
349
int main(int argc, char *argv[]){
304
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
305
352
char *argfile = NULL;
306
353
FILE *conffp;
307
size_t d_name_len;
308
DIR *dir = NULL;
309
struct dirent *dirst;
354
struct dirent **direntries = NULL;
310
355
struct stat st;
311
356
fd_set rfds_all;
312
int ret, numchars, maxfd = 0;
357
int ret, maxfd = 0;
313
358
ssize_t sret;
314
intmax_t tmpmax;
315
359
uid_t uid = 65534;
316
360
gid_t gid = 65534;
317
361
bool debug = false;
321
365
.sa_flags = SA_NOCLDSTOP };
322
366
char **custom_argv = NULL;
323
367
int custom_argc = 0;
368
int dir_fd = -1;
324
369
325
370
/* Establish a signal handler */
326
371
sigemptyset(&sigchld_action.sa_mask);
327
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
328
373
if(ret == -1){
329
perror("sigaddset");
330
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
331
376
goto fallback;
332
377
}
333
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
334
379
if(ret == -1){
335
perror("sigaction");
336
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
337
382
goto fallback;
338
383
}
339
384
371
416
.doc = "Group ID the plugins will run as", .group = 3 },
372
417
{ .name = "debug", .key = 132,
373
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 },
374
432
{ .name = NULL }
375
433
};
376
434
377
error_t parse_opt(int key, char *arg, __attribute__((unused))
378
struct argp_state *state) {
379
switch(key) {
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
438
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
380
441
case 'g': /* --global-options */
381
if(arg != NULL){
382
char *p;
383
while((p = strsep(&arg, ",")) != NULL){
384
if(p[0] == '\0'){
385
continue;
386
}
387
if(not add_argument(getplugin(NULL), p)){
388
perror("add_argument");
389
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;
390
447
}
391
448
}
449
errno = 0;
392
450
}
393
451
break;
394
452
case 'G': /* --global-env */
395
if(arg == NULL){
396
break;
397
}
398
if(not add_environment(getplugin(NULL), arg, true)){
399
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
400
455
}
401
456
break;
402
457
case 'o': /* --options-for */
403
if(arg != NULL){
404
char *p_name = strsep(&arg, ":");
405
if(p_name[0] == '\0' or arg == NULL){
406
break;
407
}
408
char *opt = strsep(&arg, ":");
409
if(opt[0] == '\0' or opt == NULL){
410
break;
411
}
412
char *p;
413
while((p = strsep(&opt, ",")) != NULL){
414
if(p[0] == '\0'){
415
continue;
416
}
417
if(not add_argument(getplugin(p_name), p)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
420
}
421
}
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;
422
479
}
423
480
break;
424
481
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
428
482
{
429
483
char *envdef = strchr(arg, ':');
430
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
431
487
break;
432
488
}
433
489
*envdef = '\0';
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
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;
436
498
}
437
499
}
438
500
break;
439
501
case 'd': /* --disable */
440
if(arg != NULL){
502
{
441
503
plugin *p = getplugin(arg);
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
444
507
}
445
p->disabled = true;
446
508
}
447
509
break;
448
510
case 'e': /* --enable */
449
if(arg != NULL){
511
{
450
512
plugin *p = getplugin(arg);
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
453
516
}
454
p->disabled = false;
455
517
}
456
518
break;
457
519
case 128: /* --plugin-dir */
458
520
free(plugindir);
459
521
plugindir = strdup(arg);
460
if(plugindir == NULL){
461
perror("strdup");
462
}
522
if(plugindir != NULL){
523
errno = 0;
524
}
463
525
break;
464
526
case 129: /* --config-file */
465
527
/* This is already done by parse_opt_config_file() */
466
528
break;
467
529
case 130: /* --userid */
468
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
469
if(ret < 1 or tmpmax != (uid_t)tmpmax
470
or arg[numchars] != '\0'){
471
fprintf(stderr, "Bad user ID number: \"%s\", using %"
472
PRIdMAX "\n", arg, (intmax_t)uid);
473
} else {
474
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;
475
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
476
539
break;
477
540
case 131: /* --groupid */
478
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
479
if(ret < 1 or tmpmax != (gid_t)tmpmax
480
or arg[numchars] != '\0'){
481
fprintf(stderr, "Bad group ID number: \"%s\", using %"
482
PRIdMAX "\n", arg, (intmax_t)gid);
483
} else {
484
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;
485
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
486
550
break;
487
551
case 132: /* --debug */
488
552
debug = true;
489
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;
490
575
/*
491
576
* When adding more options before this line, remember to also add a
492
577
* "case" to the "parse_opt_config_file" function below.
495
580
/* Cryptsetup always passes an argument, which is an empty
496
581
string if "none" was specified in /etc/crypttab. So if
497
582
argument was empty, we ignore it silently. */
498
if(arg[0] != '\0'){
499
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
500
585
}
501
break;
502
case ARGP_KEY_END:
503
break;
504
586
default:
505
587
return ARGP_ERR_UNKNOWN;
506
588
}
507
return 0;
589
return errno; /* Set to 0 at start */
508
590
}
509
591
510
592
/* This option parser is the same as parse_opt() above, except it
511
593
ignores everything but the --config-file option. */
512
594
error_t parse_opt_config_file(int key, char *arg,
513
595
__attribute__((unused))
514
struct argp_state *state) {
515
switch(key) {
596
struct argp_state *state){
597
errno = 0;
598
switch(key){
516
599
case 'g': /* --global-options */
517
600
case 'G': /* --global-env */
518
601
case 'o': /* --options-for */
524
607
case 129: /* --config-file */
525
608
free(argfile);
526
609
argfile = strdup(arg);
527
if(argfile == NULL){
528
perror("strdup");
610
if(argfile != NULL){
611
errno = 0;
529
612
}
530
break;
613
break;
531
614
case 130: /* --userid */
532
615
case 131: /* --groupid */
533
616
case 132: /* --debug */
617
case 133: /* --plugin-helper-dir */
618
case '?': /* --help */
619
case -3: /* --usage */
620
case 'V': /* --version */
534
621
case ARGP_KEY_ARG:
535
case ARGP_KEY_END:
536
622
break;
537
623
default:
538
624
return ARGP_ERR_UNKNOWN;
539
625
}
540
return 0;
626
return errno;
541
627
}
542
628
543
629
struct argp argp = { .options = options,
547
633
548
634
/* Parse using parse_opt_config_file() in order to get the custom
549
635
config file location, if any. */
550
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
551
if(ret == ARGP_ERR_UNKNOWN){
552
fprintf(stderr, "Unknown error while parsing arguments\n");
553
exitstatus = EXIT_FAILURE;
636
ret = argp_parse(&argp, argc, argv,
637
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
638
NULL, NULL);
639
switch(ret){
640
case 0:
641
break;
642
case ENOMEM:
643
default:
644
errno = ret;
645
error(0, errno, "argp_parse");
646
exitstatus = EX_OSERR;
647
goto fallback;
648
case EINVAL:
649
exitstatus = EX_USAGE;
554
650
goto fallback;
555
651
}
556
652
562
658
conffp = fopen(AFILE, "r");
563
659
} else {
564
660
conffp = fopen(argfile, "r");
565
}
661
}
566
662
if(conffp != NULL){
567
663
char *org_line = NULL;
568
664
char *p, *arg, *new_arg, *line;
569
665
size_t size = 0;
570
666
const char whitespace_delims[] = " \r\t\f\v\n";
571
667
const char comment_delim[] = "#";
572
668
573
669
custom_argc = 1;
574
670
custom_argv = malloc(sizeof(char*) * 2);
575
671
if(custom_argv == NULL){
576
perror("malloc");
577
exitstatus = EXIT_FAILURE;
672
error(0, errno, "malloc");
673
exitstatus = EX_OSERR;
578
674
goto fallback;
579
675
}
580
676
custom_argv[0] = argv[0];
581
677
custom_argv[1] = NULL;
582
678
583
679
/* for each line in the config file, strip whitespace and ignore
584
680
commented text */
585
681
while(true){
587
683
if(sret == -1){
588
684
break;
589
685
}
590
686
591
687
line = org_line;
592
688
arg = strsep(&line, comment_delim);
593
689
while((p = strsep(&arg, whitespace_delims)) != NULL){
596
692
}
597
693
new_arg = strdup(p);
598
694
if(new_arg == NULL){
599
perror("strdup");
600
exitstatus = EXIT_FAILURE;
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
601
697
free(org_line);
602
698
goto fallback;
603
699
}
604
700
605
701
custom_argc += 1;
606
custom_argv = realloc(custom_argv, sizeof(char *)
607
* ((unsigned int) custom_argc + 1));
608
if(custom_argv == NULL){
609
perror("realloc");
610
exitstatus = EXIT_FAILURE;
611
free(org_line);
612
goto fallback;
702
{
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((unsigned int)
705
custom_argc + 1));
706
if(new_argv == NULL){
707
error(0, errno, "realloc");
708
exitstatus = EX_OSERR;
709
free(new_arg);
710
free(org_line);
711
goto fallback;
712
} else {
713
custom_argv = new_argv;
714
}
613
715
}
614
716
custom_argv[custom_argc-1] = new_arg;
615
custom_argv[custom_argc] = NULL;
717
custom_argv[custom_argc] = NULL;
616
718
}
617
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
}
618
728
free(org_line);
619
729
} else {
620
730
/* Check for harmful errors and go to fallback. Other errors might
621
731
not affect opening plugins */
622
732
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
623
perror("fopen");
624
exitstatus = EXIT_FAILURE;
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
625
735
goto fallback;
626
736
}
627
737
}
628
/* If there was any arguments from configuration file,
629
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 */
630
740
if(custom_argv != NULL){
631
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
632
0, NULL);
633
if(ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
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;
636
755
goto fallback;
637
756
}
638
757
}
639
758
640
759
/* Parse actual command line arguments, to let them override the
641
760
config file */
642
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
646
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
}
647
794
}
648
795
649
796
if(debug){
660
807
}
661
808
}
662
809
663
/* Strip permissions down to nobody */
810
if(getuid() == 0){
811
/* Work around Debian bug #633582:
812
<http://bugs.debian.org/633582> */
813
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
814
if(plugindir_fd == -1){
815
if(errno != ENOENT){
816
error(0, errno, "open(\"" PDIR "\")");
817
}
818
} else {
819
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
820
if(ret == -1){
821
error(0, errno, "fstat");
822
} else {
823
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
824
ret = fchown(plugindir_fd, uid, gid);
825
if(ret == -1){
826
error(0, errno, "fchown");
827
}
828
}
829
}
830
close(plugindir_fd);
831
}
832
}
833
834
/* Lower permissions */
835
ret = setgid(gid);
836
if(ret == -1){
837
error(0, errno, "setgid");
838
}
664
839
ret = setuid(uid);
665
840
if(ret == -1){
666
perror("setuid");
667
}
668
setgid(gid);
669
if(ret == -1){
670
perror("setgid");
671
}
672
673
if(plugindir == NULL){
674
dir = opendir(PDIR);
675
} else {
676
dir = opendir(plugindir);
677
}
678
679
if(dir == NULL){
680
perror("Could not open plugin dir");
681
exitstatus = EXIT_FAILURE;
682
goto fallback;
683
}
684
685
/* 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 */
686
845
{
687
int dir_fd = dirfd(dir);
688
if(dir_fd >= 0){
689
ret = set_cloexec_flag(dir_fd);
690
if(ret < 0){
691
perror("set_cloexec_flag");
692
exitstatus = EXIT_FAILURE;
693
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;
694
890
}
695
891
}
892
return 1;
893
}
894
895
#ifdef __GLIBC__
896
#if __GLIBC_PREREQ(2, 15)
897
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
alphasort);
899
#else /* not __GLIBC_PREREQ(2, 15) */
900
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
901
&direntries, good_name, alphasort);
902
#endif /* not __GLIBC_PREREQ(2, 15) */
903
#else /* not __GLIBC__ */
904
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
905
&direntries, good_name, alphasort);
906
#endif /* not __GLIBC__ */
907
if(numplugins == -1){
908
error(0, errno, "Could not scan plugin dir");
909
direntries = NULL;
910
exitstatus = EX_OSERR;
911
goto fallback;
696
912
}
697
913
698
914
FD_ZERO(&rfds_all);
699
915
700
916
/* Read and execute any executable in the plugin directory*/
701
while(true){
702
dirst = readdir(dir);
703
704
/* All directory entries have been processed */
705
if(dirst == NULL){
706
if(errno == EBADF){
707
perror("readdir");
708
exitstatus = EXIT_FAILURE;
709
goto fallback;
710
}
711
break;
712
}
713
714
d_name_len = strlen(dirst->d_name);
715
716
/* Ignore dotfiles, backup files and other junk */
717
{
718
bool bad_name = false;
719
720
const char const *bad_prefixes[] = { ".", "#", NULL };
721
722
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
723
".dpkg-old",
724
".dpkg-bak",
725
".dpkg-divert", NULL };
726
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
727
size_t pre_len = strlen(*pre);
728
if((d_name_len >= pre_len)
729
and strncmp((dirst->d_name), *pre, pre_len) == 0){
730
if(debug){
731
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
732
" with bad prefix %s\n", dirst->d_name, *pre);
733
}
734
bad_name = true;
735
break;
736
}
737
}
738
if(bad_name){
739
continue;
740
}
741
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
742
size_t suf_len = strlen(*suf);
743
if((d_name_len >= suf_len)
744
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
745
== 0)){
746
if(debug){
747
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
748
" with bad suffix %s\n", dirst->d_name, *suf);
749
}
750
bad_name = true;
751
break;
752
}
753
}
754
755
if(bad_name){
756
continue;
757
}
758
}
759
760
char *filename;
761
if(plugindir == NULL){
762
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
763
} else {
764
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
765
}
766
if(ret < 0){
767
perror("asprintf");
917
for(int i = 0; i < numplugins; i++){
918
919
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
920
if(plugin_fd == -1){
921
error(0, errno, "Could not open plugin");
922
free(direntries[i]);
768
923
continue;
769
924
}
770
771
ret = stat(filename, &st);
925
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
772
926
if(ret == -1){
773
perror("stat");
774
free(filename);
927
error(0, errno, "stat");
928
close(plugin_fd);
929
free(direntries[i]);
775
930
continue;
776
931
}
777
932
778
933
/* Ignore non-executable files */
779
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
934
if(not S_ISREG(st.st_mode)
935
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
936
X_OK, 0)) != 0)){
780
937
if(debug){
781
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
782
" with bad type or mode\n", filename);
938
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
939
" with bad type or mode\n",
940
plugindir != NULL ? plugindir : PDIR,
941
direntries[i]->d_name);
783
942
}
784
free(filename);
943
close(plugin_fd);
944
free(direntries[i]);
785
945
continue;
786
946
}
787
947
788
plugin *p = getplugin(dirst->d_name);
948
plugin *p = getplugin(direntries[i]->d_name);
789
949
if(p == NULL){
790
perror("getplugin");
791
free(filename);
950
error(0, errno, "getplugin");
951
close(plugin_fd);
952
free(direntries[i]);
792
953
continue;
793
954
}
794
955
if(p->disabled){
795
956
if(debug){
796
957
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
797
dirst->d_name);
958
direntries[i]->d_name);
798
959
}
799
free(filename);
960
close(plugin_fd);
961
free(direntries[i]);
800
962
continue;
801
963
}
802
964
{
805
967
if(g != NULL){
806
968
for(char **a = g->argv + 1; *a != NULL; a++){
807
969
if(not add_argument(p, *a)){
808
perror("add_argument");
970
error(0, errno, "add_argument");
809
971
}
810
972
}
811
973
/* Add global environment variables */
812
974
for(char **e = g->environ; *e != NULL; e++){
813
975
if(not add_environment(p, *e, false)){
814
perror("add_environment");
976
error(0, errno, "add_environment");
815
977
}
816
978
}
817
979
}
818
980
}
819
/* If this plugin has any environment variables, we will call
820
using execve and need to duplicate the environment from this
821
process, too. */
981
/* If this plugin has any environment variables, we need to
982
duplicate the environment from this process, too. */
822
983
if(p->environ[0] != NULL){
823
984
for(char **e = environ; *e != NULL; e++){
824
985
if(not add_environment(p, *e, false)){
825
perror("add_environment");
986
error(0, errno, "add_environment");
826
987
}
827
988
}
828
989
}
829
990
830
991
int pipefd[2];
831
ret = pipe(pipefd);
992
#ifndef O_CLOEXEC
993
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
994
#else /* O_CLOEXEC */
995
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
996
#endif /* O_CLOEXEC */
832
997
if(ret == -1){
833
perror("pipe");
834
exitstatus = EXIT_FAILURE;
835
goto fallback;
836
}
998
error(0, errno, "pipe");
999
exitstatus = EX_OSERR;
1000
free(direntries[i]);
1001
goto fallback;
1002
}
1003
if(pipefd[0] >= FD_SETSIZE){
1004
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1005
FD_SETSIZE);
1006
close(pipefd[0]);
1007
close(pipefd[1]);
1008
exitstatus = EX_OSERR;
1009
free(direntries[i]);
1010
goto fallback;
1011
}
1012
#ifndef O_CLOEXEC
837
1013
/* Ask OS to automatic close the pipe on exec */
838
1014
ret = set_cloexec_flag(pipefd[0]);
839
1015
if(ret < 0){
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "set_cloexec_flag");
1017
close(pipefd[0]);
1018
close(pipefd[1]);
1019
exitstatus = EX_OSERR;
1020
free(direntries[i]);
842
1021
goto fallback;
843
1022
}
844
1023
ret = set_cloexec_flag(pipefd[1]);
845
1024
if(ret < 0){
846
perror("set_cloexec_flag");
847
exitstatus = EXIT_FAILURE;
1025
error(0, errno, "set_cloexec_flag");
1026
close(pipefd[0]);
1027
close(pipefd[1]);
1028
exitstatus = EX_OSERR;
1029
free(direntries[i]);
848
1030
goto fallback;
849
1031
}
1032
#endif /* not O_CLOEXEC */
850
1033
/* Block SIGCHLD until process is safely in process list */
851
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1035
&sigchld_action.sa_mask,
1036
NULL));
852
1037
if(ret < 0){
853
perror("sigprocmask");
854
exitstatus = EXIT_FAILURE;
1038
error(0, errno, "sigprocmask");
1039
exitstatus = EX_OSERR;
1040
free(direntries[i]);
855
1041
goto fallback;
856
1042
}
857
1043
/* Starting a new process to be watched */
858
pid_t pid = fork();
1044
pid_t pid;
1045
do {
1046
pid = fork();
1047
} while(pid == -1 and errno == EINTR);
859
1048
if(pid == -1){
860
perror("fork");
861
exitstatus = EXIT_FAILURE;
1049
error(0, errno, "fork");
1050
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1051
&sigchld_action.sa_mask, NULL));
1052
close(pipefd[0]);
1053
close(pipefd[1]);
1054
exitstatus = EX_OSERR;
1055
free(direntries[i]);
862
1056
goto fallback;
863
1057
}
864
1058
if(pid == 0){
865
1059
/* this is the child process */
866
1060
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
867
1061
if(ret < 0){
868
perror("sigaction");
869
_exit(EXIT_FAILURE);
1062
error(0, errno, "sigaction");
1063
_exit(EX_OSERR);
870
1064
}
871
1065
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
872
1066
if(ret < 0){
873
perror("sigprocmask");
874
_exit(EXIT_FAILURE);
1067
error(0, errno, "sigprocmask");
1068
_exit(EX_OSERR);
875
1069
}
876
1070
877
1071
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
878
1072
if(ret == -1){
879
perror("dup2");
880
_exit(EXIT_FAILURE);
1073
error(0, errno, "dup2");
1074
_exit(EX_OSERR);
881
1075
}
882
1076
883
if(dirfd(dir) < 0){
884
/* If dir has no file descriptor, we could not set FD_CLOEXEC
885
above and must now close it manually here. */
886
closedir(dir);
887
}
888
if(p->environ[0] == NULL){
889
if(execv(filename, p->argv) < 0){
890
perror("execv");
891
_exit(EXIT_FAILURE);
892
}
893
} else {
894
if(execve(filename, p->argv, p->environ) < 0){
895
perror("execve");
896
_exit(EXIT_FAILURE);
897
}
1077
if(fexecve(plugin_fd, p->argv,
1078
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1079
error(0, errno, "fexecve for %s/%s",
1080
plugindir != NULL ? plugindir : PDIR,
1081
direntries[i]->d_name);
1082
_exit(EX_OSERR);
898
1083
}
899
1084
/* no return */
900
1085
}
901
1086
/* Parent process */
902
1087
close(pipefd[1]); /* Close unused write end of pipe */
903
free(filename);
904
plugin *new_plugin = getplugin(dirst->d_name);
1088
close(plugin_fd);
1089
plugin *new_plugin = getplugin(direntries[i]->d_name);
905
1090
if(new_plugin == NULL){
906
perror("getplugin");
907
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1091
error(0, errno, "getplugin");
1092
ret = (int)(TEMP_FAILURE_RETRY
1093
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1094
NULL)));
908
1095
if(ret < 0){
909
perror("sigprocmask");
1096
error(0, errno, "sigprocmask");
910
1097
}
911
exitstatus = EXIT_FAILURE;
1098
exitstatus = EX_OSERR;
1099
free(direntries[i]);
912
1100
goto fallback;
913
1101
}
1102
free(direntries[i]);
914
1103
915
1104
new_plugin->pid = pid;
916
1105
new_plugin->fd = pipefd[0];
917
1106
918
1107
/* Unblock SIGCHLD so signal handler can be run if this process
919
1108
has already completed */
920
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1109
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1110
&sigchld_action.sa_mask,
1111
NULL));
921
1112
if(ret < 0){
922
perror("sigprocmask");
923
exitstatus = EXIT_FAILURE;
1113
error(0, errno, "sigprocmask");
1114
exitstatus = EX_OSERR;
924
1115
goto fallback;
925
1116
}
926
1117
927
FD_SET(new_plugin->fd, &rfds_all);
1118
#if defined (__GNUC__) and defined (__GLIBC__)
1119
#if not __GLIBC_PREREQ(2, 16)
1120
#pragma GCC diagnostic push
1121
#pragma GCC diagnostic ignored "-Wsign-conversion"
1122
#endif
1123
#endif
1124
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1125
-Wconversion in GNU libc
1126
before 2.16 */
1127
#if defined (__GNUC__) and defined (__GLIBC__)
1128
#if not __GLIBC_PREREQ(2, 16)
1129
#pragma GCC diagnostic pop
1130
#endif
1131
#endif
928
1132
929
1133
if(maxfd < new_plugin->fd){
930
1134
maxfd = new_plugin->fd;
931
1135
}
932
1136
}
933
1137
934
closedir(dir);
935
dir = NULL;
1138
free(direntries);
1139
direntries = NULL;
1140
close(dir_fd);
1141
dir_fd = -1;
1142
free_plugin(getplugin(NULL));
936
1143
937
1144
for(plugin *p = plugin_list; p != NULL; p = p->next){
938
1145
if(p->pid != 0){
949
1156
while(plugin_list){
950
1157
fd_set rfds = rfds_all;
951
1158
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
952
if(select_ret == -1){
953
perror("select");
954
exitstatus = EXIT_FAILURE;
1159
if(select_ret == -1 and errno != EINTR){
1160
error(0, errno, "select");
1161
exitstatus = EX_OSERR;
955
1162
goto fallback;
956
1163
}
957
1164
/* OK, now either a process completed, or something can be read
958
1165
from one of them */
959
1166
for(plugin *proc = plugin_list; proc != NULL;){
960
1167
/* Is this process completely done? */
961
if(proc->eof and proc->completed){
1168
if(proc->completed and proc->eof){
962
1169
/* Only accept the plugin output if it exited cleanly */
963
1170
if(not WIFEXITED(proc->status)
964
1171
or WEXITSTATUS(proc->status) != 0){
965
1172
/* Bad exit by plugin */
966
1173
967
1174
if(debug){
968
1175
if(WIFEXITED(proc->status)){
969
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
970
" %d\n", (intmax_t) (proc->pid),
1176
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1177
" status %d\n", proc->name,
1178
(intmax_t) (proc->pid),
971
1179
WEXITSTATUS(proc->status));
972
} else if(WIFSIGNALED(proc->status)) {
973
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
974
" %d\n", (intmax_t) (proc->pid),
975
WTERMSIG(proc->status));
1180
} else if(WIFSIGNALED(proc->status)){
1181
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1182
" signal %d: %s\n", proc->name,
1183
(intmax_t) (proc->pid),
1184
WTERMSIG(proc->status),
1185
strsignal(WTERMSIG(proc->status)));
976
1186
} else if(WCOREDUMP(proc->status)){
977
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
978
(intmax_t) (proc->pid));
1187
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1188
" core\n", proc->name, (intmax_t) (proc->pid));
979
1189
}
980
1190
}
981
1191
982
1192
/* Remove the plugin */
983
FD_CLR(proc->fd, &rfds_all);
984
1193
#if defined (__GNUC__) and defined (__GLIBC__)
1194
#if not __GLIBC_PREREQ(2, 16)
1195
#pragma GCC diagnostic push
1196
#pragma GCC diagnostic ignored "-Wsign-conversion"
1197
#endif
1198
#endif
1199
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1200
-Wconversion in GNU libc
1201
before 2.16 */
1202
#if defined (__GNUC__) and defined (__GLIBC__)
1203
#if not __GLIBC_PREREQ(2, 16)
1204
#pragma GCC diagnostic pop
1205
#endif
1206
#endif
1207
985
1208
/* Block signal while modifying process_list */
986
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1209
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1210
(SIG_BLOCK,
1211
&sigchld_action.sa_mask,
1212
NULL));
987
1213
if(ret < 0){
988
perror("sigprocmask");
989
exitstatus = EXIT_FAILURE;
1214
error(0, errno, "sigprocmask");
1215
exitstatus = EX_OSERR;
990
1216
goto fallback;
991
1217
}
992
1218
995
1221
proc = next_plugin;
996
1222
997
1223
/* We are done modifying process list, so unblock signal */
998
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
999
NULL);
1224
ret = (int)(TEMP_FAILURE_RETRY
1225
(sigprocmask(SIG_UNBLOCK,
1226
&sigchld_action.sa_mask, NULL)));
1000
1227
if(ret < 0){
1001
perror("sigprocmask");
1002
exitstatus = EXIT_FAILURE;
1228
error(0, errno, "sigprocmask");
1229
exitstatus = EX_OSERR;
1003
1230
goto fallback;
1004
1231
}
1005
1232
1015
1242
bool bret = print_out_password(proc->buffer,
1016
1243
proc->buffer_length);
1017
1244
if(not bret){
1018
perror("print_out_password");
1019
exitstatus = EXIT_FAILURE;
1245
error(0, errno, "print_out_password");
1246
exitstatus = EX_IOERR;
1020
1247
}
1021
1248
goto fallback;
1022
1249
}
1023
1250
1024
1251
/* This process has not completed. Does it have any output? */
1025
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1252
#if defined (__GNUC__) and defined (__GLIBC__)
1253
#if not __GLIBC_PREREQ(2, 16)
1254
#pragma GCC diagnostic push
1255
#pragma GCC diagnostic ignored "-Wsign-conversion"
1256
#endif
1257
#endif
1258
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1259
warning from
1260
-Wconversion
1261
in GNU libc
1262
before
1263
2.16 */
1264
#if defined (__GNUC__) and defined (__GLIBC__)
1265
#if not __GLIBC_PREREQ(2, 16)
1266
#pragma GCC diagnostic pop
1267
#endif
1268
#endif
1026
1269
/* This process had nothing to say at this time */
1027
1270
proc = proc->next;
1028
1271
continue;
1029
1272
}
1030
1273
/* Before reading, make the process' data buffer large enough */
1031
1274
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1032
proc->buffer = realloc(proc->buffer, proc->buffer_size
1033
+ (size_t) BUFFER_SIZE);
1034
if(proc->buffer == NULL){
1035
perror("malloc");
1036
exitstatus = EXIT_FAILURE;
1275
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1276
+ (size_t) BUFFER_SIZE);
1277
if(new_buffer == NULL){
1278
error(0, errno, "malloc");
1279
exitstatus = EX_OSERR;
1037
1280
goto fallback;
1038
1281
}
1282
proc->buffer = new_buffer;
1039
1283
proc->buffer_size += BUFFER_SIZE;
1040
1284
}
1041
1285
/* Read from the process */
1042
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1043
BUFFER_SIZE);
1286
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1287
proc->buffer
1288
+ proc->buffer_length,
1289
BUFFER_SIZE));
1044
1290
if(sret < 0){
1045
1291
/* Read error from this process; ignore the error */
1046
1292
proc = proc->next;
1054
1300
}
1055
1301
}
1056
1302
}
1057
1058
1303
1304
1059
1305
fallback:
1060
1306
1061
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1307
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1308
and exitstatus != EX_OK)){
1062
1309
/* Fallback if all plugins failed, none are found or an error
1063
1310
occured */
1064
1311
bool bret;
1072
1319
}
1073
1320
bret = print_out_password(passwordbuffer, len);
1074
1321
if(not bret){
1075
perror("print_out_password");
1076
exitstatus = EXIT_FAILURE;
1322
error(0, errno, "print_out_password");
1323
exitstatus = EX_IOERR;
1077
1324
}
1078
1325
}
1079
1326
1080
1327
/* Restore old signal handler */
1081
1328
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1082
1329
if(ret == -1){
1083
perror("sigaction");
1084
exitstatus = EXIT_FAILURE;
1330
error(0, errno, "sigaction");
1331
exitstatus = EX_OSERR;
1085
1332
}
1086
1333
1087
1334
if(custom_argv != NULL){
1091
1338
free(custom_argv);
1092
1339
}
1093
1340
1094
if(dir != NULL){
1095
closedir(dir);
1341
free(direntries);
1342
1343
if(dir_fd != -1){
1344
close(dir_fd);
1096
1345
}
1097
1346
1098
1347
/* Kill the processes */
1102
1351
ret = kill(p->pid, SIGTERM);
1103
1352
if(ret == -1 and errno != ESRCH){
1104
1353
/* Set-uid proccesses might not get closed */
1105
perror("kill");
1354
error(0, errno, "kill");
1106
1355
}
1107
1356
}
1108
1357
}
1109
1358
1110
1359
/* Wait for any remaining child processes to terminate */
1111
do{
1360
do {
1112
1361
ret = wait(NULL);
1113
1362
} while(ret >= 0);
1114
1363
if(errno != ECHILD){
1115
perror("wait");
1364
error(0, errno, "wait");
1116
1365
}
1117
1366
1118
1367
free_plugin_list();
1119
1368
1120
1369
free(plugindir);
1370
free(pluginhelperdir);
1121
1371
free(argfile);
1122
1372
1123
1373
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0