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- Committer: Teddy Hogeborn
- Date: 2015-07-20 03:03:33 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 325.
- 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;
118
133
free(new_plugin);
134
errno = e;
119
135
return NULL;
120
136
}
121
137
}
122
138
123
*new_plugin = (plugin) { .name = copy_name,
124
.argc = 1,
125
.disabled = false,
126
.next = plugin_list };
139
*new_plugin = (plugin){ .name = copy_name,
140
.argc = 1,
141
.disabled = false,
142
.next = plugin_list };
127
143
128
new_plugin->argv = malloc(sizeof(char *) * 2);
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
129
147
if(new_plugin->argv == NULL){
148
int e = errno;
130
149
free(copy_name);
131
150
free(new_plugin);
151
errno = e;
132
152
return NULL;
133
153
}
134
154
new_plugin->argv[0] = copy_name;
135
155
new_plugin->argv[1] = NULL;
136
156
137
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
138
160
if(new_plugin->environ == NULL){
161
int e = errno;
139
162
free(copy_name);
140
163
free(new_plugin->argv);
141
164
free(new_plugin);
165
errno = e;
142
166
return NULL;
143
167
}
144
168
new_plugin->environ[0] = NULL;
149
173
}
150
174
151
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
152
177
static bool add_to_char_array(const char *new, char ***array,
153
178
int *len){
154
179
/* Resize the pointed-to array to hold one more pointer */
155
*array = realloc(*array, sizeof(char *)
156
* (size_t) ((*len) + 2));
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
157
185
/* Malloc check */
158
if(*array == NULL){
186
if(new_array == NULL){
159
187
return false;
160
188
}
189
*array = new_array;
161
190
/* Make a copy of the new string */
162
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
163
195
if(copy == NULL){
164
196
return false;
165
197
}
172
204
}
173
205
174
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
175
208
static bool add_argument(plugin *p, const char *arg){
176
209
if(p == NULL){
177
210
return false;
180
213
}
181
214
182
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
183
217
static bool add_environment(plugin *p, const char *def, bool replace){
184
218
if(p == NULL){
185
219
return false;
187
221
/* namelen = length of name of environment variable */
188
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
189
223
/* Search for this environment variable */
190
for(char **e = p->environ; *e != NULL; e++){
191
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
192
226
/* It already exists */
193
227
if(replace){
194
char *new = realloc(*e, strlen(def) + 1);
195
if(new == NULL){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
196
233
return false;
197
234
}
198
*e = new;
199
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
200
237
}
201
238
return true;
202
239
}
204
241
return add_to_char_array(def, &(p->environ), &(p->envc));
205
242
}
206
243
244
#ifndef O_CLOEXEC
207
245
/*
208
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
209
247
* Descriptor Flags".
210
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
249
*/
250
__attribute__((warn_unused_result))
212
251
static int set_cloexec_flag(int fd){
213
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
253
/* If reading the flags failed, return error indication now. */
215
254
if(ret < 0){
216
255
return ret;
217
256
}
218
257
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
220
260
}
261
#endif /* not O_CLOEXEC */
221
262
222
263
223
264
/* Mark processes as completed when they exit, and save their exit
224
265
status. */
225
266
static void handle_sigchld(__attribute__((unused)) int sig){
267
int old_errno = errno;
226
268
while(true){
227
269
plugin *proc = plugin_list;
228
270
int status;
232
274
break;
233
275
}
234
276
if(pid == -1){
235
if(errno != ECHILD){
236
perror("waitpid");
277
if(errno == ECHILD){
278
/* No child processes */
279
break;
237
280
}
238
/* No child processes */
239
break;
281
error(0, errno, "waitpid");
240
282
}
241
283
242
284
/* A child exited, find it in process_list */
248
290
continue;
249
291
}
250
292
proc->status = status;
251
proc->completed = true;
293
proc->completed = 1;
252
294
}
295
errno = old_errno;
253
296
}
254
297
255
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
256
300
static bool print_out_password(const char *buffer, size_t length){
257
301
ssize_t ret;
258
302
for(size_t written = 0; written < length; written += (size_t)ret){
266
310
}
267
311
268
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
269
314
static void free_plugin(plugin *plugin_node){
270
315
271
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
277
322
}
278
323
free(plugin_node->environ);
279
324
free(plugin_node->buffer);
280
325
281
326
/* Removes the plugin from the singly-linked list */
282
327
if(plugin_node == plugin_list){
283
328
/* First one - simple */
303
348
304
349
int main(int argc, char *argv[]){
305
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
306
352
char *argfile = NULL;
307
353
FILE *conffp;
308
size_t d_name_len;
309
DIR *dir = NULL;
310
struct dirent *dirst;
354
struct dirent **direntries = NULL;
311
355
struct stat st;
312
356
fd_set rfds_all;
313
int ret, numchars, maxfd = 0;
357
int ret, maxfd = 0;
314
358
ssize_t sret;
315
intmax_t tmpmax;
316
359
uid_t uid = 65534;
317
360
gid_t gid = 65534;
318
361
bool debug = false;
322
365
.sa_flags = SA_NOCLDSTOP };
323
366
char **custom_argv = NULL;
324
367
int custom_argc = 0;
368
int dir_fd = -1;
325
369
326
370
/* Establish a signal handler */
327
371
sigemptyset(&sigchld_action.sa_mask);
328
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
329
373
if(ret == -1){
330
perror("sigaddset");
331
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
332
376
goto fallback;
333
377
}
334
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
335
379
if(ret == -1){
336
perror("sigaction");
337
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
338
382
goto fallback;
339
383
}
340
384
372
416
.doc = "Group ID the plugins will run as", .group = 3 },
373
417
{ .name = "debug", .key = 132,
374
418
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
420
.arg = "DIRECTORY",
421
.doc = "Specify a different plugin helper directory",
422
.group = 2 },
423
/*
424
* These reproduce what we would get without ARGP_NO_HELP
425
*/
426
{ .name = "help", .key = '?',
427
.doc = "Give this help list", .group = -1 },
428
{ .name = "usage", .key = -3,
429
.doc = "Give a short usage message", .group = -1 },
430
{ .name = "version", .key = 'V',
431
.doc = "Print program version", .group = -1 },
375
432
{ .name = NULL }
376
433
};
377
434
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state) {
380
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;
381
441
case 'g': /* --global-options */
382
if(arg != NULL){
383
char *p;
384
while((p = strsep(&arg, ",")) != NULL){
385
if(p[0] == '\0'){
386
continue;
387
}
388
if(not add_argument(getplugin(NULL), p)){
389
perror("add_argument");
390
return ARGP_ERR_UNKNOWN;
442
{
443
char *plugin_option;
444
while((plugin_option = strsep(&arg, ",")) != NULL){
445
if(not add_argument(getplugin(NULL), plugin_option)){
446
break;
391
447
}
392
448
}
449
errno = 0;
393
450
}
394
451
break;
395
452
case 'G': /* --global-env */
396
if(arg == NULL){
397
break;
398
}
399
if(not add_environment(getplugin(NULL), arg, true)){
400
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
401
455
}
402
456
break;
403
457
case 'o': /* --options-for */
404
if(arg != NULL){
405
char *p_name = strsep(&arg, ":");
406
if(p_name[0] == '\0' or arg == NULL){
407
break;
408
}
409
char *opt = strsep(&arg, ":");
410
if(opt[0] == '\0' or opt == NULL){
411
break;
412
}
413
char *p;
414
while((p = strsep(&opt, ",")) != NULL){
415
if(p[0] == '\0'){
416
continue;
417
}
418
if(not add_argument(getplugin(p_name), p)){
419
perror("add_argument");
420
return ARGP_ERR_UNKNOWN;
421
}
422
}
458
{
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*option_list = '\0';
466
option_list++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
char *option;
473
while((option = strsep(&option_list, ",")) != NULL){
474
if(not add_argument(getplugin(arg), option)){
475
break;
476
}
477
}
478
errno = 0;
423
479
}
424
480
break;
425
481
case 'E': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
429
482
{
430
483
char *envdef = strchr(arg, ':');
431
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
432
487
break;
433
488
}
434
489
*envdef = '\0';
435
if(not add_environment(getplugin(arg), envdef+1, true)){
436
perror("add_environment");
490
envdef++;
491
if(arg[0] == '\0'){
492
argp_error(state, "Empty plugin name");
493
errno = EINVAL;
494
break;
495
}
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
437
498
}
438
499
}
439
500
break;
440
501
case 'd': /* --disable */
441
if(arg != NULL){
502
{
442
503
plugin *p = getplugin(arg);
443
if(p == NULL){
444
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
445
507
}
446
p->disabled = true;
447
508
}
448
509
break;
449
510
case 'e': /* --enable */
450
if(arg != NULL){
511
{
451
512
plugin *p = getplugin(arg);
452
if(p == NULL){
453
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
454
516
}
455
p->disabled = false;
456
517
}
457
518
break;
458
519
case 128: /* --plugin-dir */
459
520
free(plugindir);
460
521
plugindir = strdup(arg);
461
if(plugindir == NULL){
462
perror("strdup");
463
}
522
if(plugindir != NULL){
523
errno = 0;
524
}
464
525
break;
465
526
case 129: /* --config-file */
466
527
/* This is already done by parse_opt_config_file() */
467
528
break;
468
529
case 130: /* --userid */
469
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
470
if(ret < 1 or tmpmax != (uid_t)tmpmax
471
or arg[numchars] != '\0'){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
530
tmp_id = strtoimax(arg, &tmp, 10);
531
if(errno != 0 or tmp == arg or *tmp != '\0'
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
535
break;
476
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
477
539
break;
478
540
case 131: /* --groupid */
479
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
480
if(ret < 1 or tmpmax != (gid_t)tmpmax
481
or arg[numchars] != '\0'){
482
fprintf(stderr, "Bad group ID number: \"%s\", using %"
483
PRIdMAX "\n", arg, (intmax_t)gid);
484
} else {
485
gid = (gid_t)tmpmax;
541
tmp_id = strtoimax(arg, &tmp, 10);
542
if(errno != 0 or tmp == arg or *tmp != '\0'
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
546
break;
486
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
487
550
break;
488
551
case 132: /* --debug */
489
552
debug = true;
490
553
break;
554
case 133: /* --plugin-helper-dir */
555
free(pluginhelperdir);
556
pluginhelperdir = strdup(arg);
557
if(pluginhelperdir != NULL){
558
errno = 0;
559
}
560
break;
561
/*
562
* These reproduce what we would get without ARGP_NO_HELP
563
*/
564
case '?': /* --help */
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
case -3: /* --usage */
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
569
argp_state_help(state, state->out_stream,
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
571
case 'V': /* --version */
572
fprintf(state->out_stream, "%s\n", argp_program_version);
573
exit(EXIT_SUCCESS);
574
break;
491
575
/*
492
576
* When adding more options before this line, remember to also add a
493
577
* "case" to the "parse_opt_config_file" function below.
496
580
/* Cryptsetup always passes an argument, which is an empty
497
581
string if "none" was specified in /etc/crypttab. So if
498
582
argument was empty, we ignore it silently. */
499
if(arg[0] != '\0'){
500
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
501
585
}
502
break;
503
case ARGP_KEY_END:
504
break;
505
586
default:
506
587
return ARGP_ERR_UNKNOWN;
507
588
}
508
return 0;
589
return errno; /* Set to 0 at start */
509
590
}
510
591
511
592
/* This option parser is the same as parse_opt() above, except it
512
593
ignores everything but the --config-file option. */
513
594
error_t parse_opt_config_file(int key, char *arg,
514
595
__attribute__((unused))
515
struct argp_state *state) {
516
switch(key) {
596
struct argp_state *state){
597
errno = 0;
598
switch(key){
517
599
case 'g': /* --global-options */
518
600
case 'G': /* --global-env */
519
601
case 'o': /* --options-for */
525
607
case 129: /* --config-file */
526
608
free(argfile);
527
609
argfile = strdup(arg);
528
if(argfile == NULL){
529
perror("strdup");
610
if(argfile != NULL){
611
errno = 0;
530
612
}
531
break;
613
break;
532
614
case 130: /* --userid */
533
615
case 131: /* --groupid */
534
616
case 132: /* --debug */
617
case 133: /* --plugin-helper-dir */
618
case '?': /* --help */
619
case -3: /* --usage */
620
case 'V': /* --version */
535
621
case ARGP_KEY_ARG:
536
case ARGP_KEY_END:
537
622
break;
538
623
default:
539
624
return ARGP_ERR_UNKNOWN;
540
625
}
541
return 0;
626
return errno;
542
627
}
543
628
544
629
struct argp argp = { .options = options,
548
633
549
634
/* Parse using parse_opt_config_file() in order to get the custom
550
635
config file location, if any. */
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
553
fprintf(stderr, "Unknown error while parsing arguments\n");
554
exitstatus = EXIT_FAILURE;
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;
555
650
goto fallback;
556
651
}
557
652
563
658
conffp = fopen(AFILE, "r");
564
659
} else {
565
660
conffp = fopen(argfile, "r");
566
}
661
}
567
662
if(conffp != NULL){
568
663
char *org_line = NULL;
569
664
char *p, *arg, *new_arg, *line;
570
665
size_t size = 0;
571
666
const char whitespace_delims[] = " \r\t\f\v\n";
572
667
const char comment_delim[] = "#";
573
668
574
669
custom_argc = 1;
575
670
custom_argv = malloc(sizeof(char*) * 2);
576
671
if(custom_argv == NULL){
577
perror("malloc");
578
exitstatus = EXIT_FAILURE;
672
error(0, errno, "malloc");
673
exitstatus = EX_OSERR;
579
674
goto fallback;
580
675
}
581
676
custom_argv[0] = argv[0];
582
677
custom_argv[1] = NULL;
583
678
584
679
/* for each line in the config file, strip whitespace and ignore
585
680
commented text */
586
681
while(true){
588
683
if(sret == -1){
589
684
break;
590
685
}
591
686
592
687
line = org_line;
593
688
arg = strsep(&line, comment_delim);
594
689
while((p = strsep(&arg, whitespace_delims)) != NULL){
597
692
}
598
693
new_arg = strdup(p);
599
694
if(new_arg == NULL){
600
perror("strdup");
601
exitstatus = EXIT_FAILURE;
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
602
697
free(org_line);
603
698
goto fallback;
604
699
}
605
700
606
701
custom_argc += 1;
607
custom_argv = realloc(custom_argv, sizeof(char *)
608
* ((unsigned int) custom_argc + 1));
609
if(custom_argv == NULL){
610
perror("realloc");
611
exitstatus = EXIT_FAILURE;
612
free(org_line);
613
goto fallback;
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
}
614
715
}
615
716
custom_argv[custom_argc-1] = new_arg;
616
custom_argv[custom_argc] = NULL;
717
custom_argv[custom_argc] = NULL;
617
718
}
618
719
}
720
do {
721
ret = fclose(conffp);
722
} while(ret == EOF and errno == EINTR);
723
if(ret == EOF){
724
error(0, errno, "fclose");
725
exitstatus = EX_IOERR;
726
goto fallback;
727
}
619
728
free(org_line);
620
729
} else {
621
730
/* Check for harmful errors and go to fallback. Other errors might
622
731
not affect opening plugins */
623
732
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
624
perror("fopen");
625
exitstatus = EXIT_FAILURE;
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
626
735
goto fallback;
627
736
}
628
737
}
629
/* If there was any arguments from configuration file,
630
pass them to parser as command arguments */
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
631
740
if(custom_argv != NULL){
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
633
0, NULL);
634
if(ret == ARGP_ERR_UNKNOWN){
635
fprintf(stderr, "Unknown error while parsing arguments\n");
636
exitstatus = EXIT_FAILURE;
741
ret = argp_parse(&argp, custom_argc, custom_argv,
742
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
743
NULL, NULL);
744
switch(ret){
745
case 0:
746
break;
747
case ENOMEM:
748
default:
749
errno = ret;
750
error(0, errno, "argp_parse");
751
exitstatus = EX_OSERR;
752
goto fallback;
753
case EINVAL:
754
exitstatus = EX_CONFIG;
637
755
goto fallback;
638
756
}
639
757
}
640
758
641
759
/* Parse actual command line arguments, to let them override the
642
760
config file */
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
645
fprintf(stderr, "Unknown error while parsing arguments\n");
646
exitstatus = EXIT_FAILURE;
647
goto fallback;
761
ret = argp_parse(&argp, argc, argv,
762
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
763
NULL, NULL);
764
switch(ret){
765
case 0:
766
break;
767
case ENOMEM:
768
default:
769
errno = ret;
770
error(0, errno, "argp_parse");
771
exitstatus = EX_OSERR;
772
goto fallback;
773
case EINVAL:
774
exitstatus = EX_USAGE;
775
goto fallback;
776
}
777
778
{
779
char *pluginhelperenv;
780
bool bret = true;
781
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
782
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
783
if(ret != -1){
784
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
785
}
786
if(ret == -1 or not bret){
787
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
788
" environment variable to \"%s\" for all plugins\n",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
}
791
if(ret != -1){
792
free(pluginhelperenv);
793
}
648
794
}
649
795
650
796
if(debug){
661
807
}
662
808
}
663
809
664
/* 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
}
665
839
ret = setuid(uid);
666
840
if(ret == -1){
667
perror("setuid");
668
}
669
setgid(gid);
670
if(ret == -1){
671
perror("setgid");
672
}
673
674
if(plugindir == NULL){
675
dir = opendir(PDIR);
676
} else {
677
dir = opendir(plugindir);
678
}
679
680
if(dir == NULL){
681
perror("Could not open plugin dir");
682
exitstatus = EXIT_FAILURE;
683
goto fallback;
684
}
685
686
/* Set the FD_CLOEXEC flag on the directory, if possible */
841
error(0, errno, "setuid");
842
}
843
844
/* Open plugin directory with close_on_exec flag */
687
845
{
688
int dir_fd = dirfd(dir);
689
if(dir_fd >= 0){
690
ret = set_cloexec_flag(dir_fd);
691
if(ret < 0){
692
perror("set_cloexec_flag");
693
exitstatus = EXIT_FAILURE;
694
goto fallback;
846
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
847
#ifdef O_CLOEXEC
848
O_CLOEXEC
849
#else /* not O_CLOEXEC */
850
0
851
#endif /* not O_CLOEXEC */
852
);
853
if(dir_fd == -1){
854
error(0, errno, "Could not open plugin dir");
855
exitstatus = EX_UNAVAILABLE;
856
goto fallback;
857
}
858
859
#ifndef O_CLOEXEC
860
/* Set the FD_CLOEXEC flag on the directory */
861
ret = set_cloexec_flag(dir_fd);
862
if(ret < 0){
863
error(0, errno, "set_cloexec_flag");
864
exitstatus = EX_OSERR;
865
goto fallback;
866
}
867
#endif /* O_CLOEXEC */
868
}
869
870
int good_name(const struct dirent * const dirent){
871
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
872
"*.dpkg-old", "*.dpkg-bak",
873
"*.dpkg-divert", NULL };
874
#ifdef __GNUC__
875
#pragma GCC diagnostic push
876
#pragma GCC diagnostic ignored "-Wcast-qual"
877
#endif
878
for(const char **pat = (const char **)patterns;
879
*pat != NULL; pat++){
880
#ifdef __GNUC__
881
#pragma GCC diagnostic pop
882
#endif
883
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
884
!= FNM_NOMATCH){
885
if(debug){
886
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
887
" matching pattern %s\n", dirent->d_name, *pat);
888
}
889
return 0;
695
890
}
696
891
}
892
return 1;
893
}
894
895
#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;
697
912
}
698
913
699
914
FD_ZERO(&rfds_all);
700
915
701
916
/* Read and execute any executable in the plugin directory*/
702
while(true){
703
dirst = readdir(dir);
704
705
/* All directory entries have been processed */
706
if(dirst == NULL){
707
if(errno == EBADF){
708
perror("readdir");
709
exitstatus = EXIT_FAILURE;
710
goto fallback;
711
}
712
break;
713
}
714
715
d_name_len = strlen(dirst->d_name);
716
717
/* Ignore dotfiles, backup files and other junk */
718
{
719
bool bad_name = false;
720
721
const char const *bad_prefixes[] = { ".", "#", NULL };
722
723
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
724
".dpkg-old",
725
".dpkg-bak",
726
".dpkg-divert", NULL };
727
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
728
size_t pre_len = strlen(*pre);
729
if((d_name_len >= pre_len)
730
and strncmp((dirst->d_name), *pre, pre_len) == 0){
731
if(debug){
732
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
733
" with bad prefix %s\n", dirst->d_name, *pre);
734
}
735
bad_name = true;
736
break;
737
}
738
}
739
if(bad_name){
740
continue;
741
}
742
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
743
size_t suf_len = strlen(*suf);
744
if((d_name_len >= suf_len)
745
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
746
== 0)){
747
if(debug){
748
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
749
" with bad suffix %s\n", dirst->d_name, *suf);
750
}
751
bad_name = true;
752
break;
753
}
754
}
755
756
if(bad_name){
757
continue;
758
}
759
}
760
761
char *filename;
762
if(plugindir == NULL){
763
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
764
} else {
765
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
766
}
767
if(ret < 0){
768
perror("asprintf");
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]);
769
923
continue;
770
924
}
771
772
ret = stat(filename, &st);
925
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
773
926
if(ret == -1){
774
perror("stat");
775
free(filename);
927
error(0, errno, "stat");
928
close(plugin_fd);
929
free(direntries[i]);
776
930
continue;
777
931
}
778
932
779
933
/* Ignore non-executable files */
780
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)){
781
937
if(debug){
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
783
" 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);
784
942
}
785
free(filename);
943
close(plugin_fd);
944
free(direntries[i]);
786
945
continue;
787
946
}
788
947
789
plugin *p = getplugin(dirst->d_name);
948
plugin *p = getplugin(direntries[i]->d_name);
790
949
if(p == NULL){
791
perror("getplugin");
792
free(filename);
950
error(0, errno, "getplugin");
951
close(plugin_fd);
952
free(direntries[i]);
793
953
continue;
794
954
}
795
955
if(p->disabled){
796
956
if(debug){
797
957
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
798
dirst->d_name);
958
direntries[i]->d_name);
799
959
}
800
free(filename);
960
close(plugin_fd);
961
free(direntries[i]);
801
962
continue;
802
963
}
803
964
{
806
967
if(g != NULL){
807
968
for(char **a = g->argv + 1; *a != NULL; a++){
808
969
if(not add_argument(p, *a)){
809
perror("add_argument");
970
error(0, errno, "add_argument");
810
971
}
811
972
}
812
973
/* Add global environment variables */
813
974
for(char **e = g->environ; *e != NULL; e++){
814
975
if(not add_environment(p, *e, false)){
815
perror("add_environment");
976
error(0, errno, "add_environment");
816
977
}
817
978
}
818
979
}
819
980
}
820
/* If this plugin has any environment variables, we will call
821
using execve and need to duplicate the environment from this
822
process, too. */
981
/* If this plugin has any environment variables, we need to
982
duplicate the environment from this process, too. */
823
983
if(p->environ[0] != NULL){
824
984
for(char **e = environ; *e != NULL; e++){
825
985
if(not add_environment(p, *e, false)){
826
perror("add_environment");
986
error(0, errno, "add_environment");
827
987
}
828
988
}
829
989
}
830
990
831
991
int pipefd[2];
832
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 */
833
997
if(ret == -1){
834
perror("pipe");
835
exitstatus = EXIT_FAILURE;
836
goto fallback;
837
}
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
838
1013
/* Ask OS to automatic close the pipe on exec */
839
1014
ret = set_cloexec_flag(pipefd[0]);
840
1015
if(ret < 0){
841
perror("set_cloexec_flag");
842
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]);
843
1021
goto fallback;
844
1022
}
845
1023
ret = set_cloexec_flag(pipefd[1]);
846
1024
if(ret < 0){
847
perror("set_cloexec_flag");
848
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]);
849
1030
goto fallback;
850
1031
}
1032
#endif /* not O_CLOEXEC */
851
1033
/* Block SIGCHLD until process is safely in process list */
852
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));
853
1037
if(ret < 0){
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
1038
error(0, errno, "sigprocmask");
1039
exitstatus = EX_OSERR;
1040
free(direntries[i]);
856
1041
goto fallback;
857
1042
}
858
1043
/* Starting a new process to be watched */
859
pid_t pid = fork();
1044
pid_t pid;
1045
do {
1046
pid = fork();
1047
} while(pid == -1 and errno == EINTR);
860
1048
if(pid == -1){
861
perror("fork");
862
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]);
863
1056
goto fallback;
864
1057
}
865
1058
if(pid == 0){
866
1059
/* this is the child process */
867
1060
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
868
1061
if(ret < 0){
869
perror("sigaction");
870
_exit(EXIT_FAILURE);
1062
error(0, errno, "sigaction");
1063
_exit(EX_OSERR);
871
1064
}
872
1065
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
873
1066
if(ret < 0){
874
perror("sigprocmask");
875
_exit(EXIT_FAILURE);
1067
error(0, errno, "sigprocmask");
1068
_exit(EX_OSERR);
876
1069
}
877
1070
878
1071
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
879
1072
if(ret == -1){
880
perror("dup2");
881
_exit(EXIT_FAILURE);
1073
error(0, errno, "dup2");
1074
_exit(EX_OSERR);
882
1075
}
883
1076
884
if(dirfd(dir) < 0){
885
/* If dir has no file descriptor, we could not set FD_CLOEXEC
886
above and must now close it manually here. */
887
closedir(dir);
888
}
889
if(p->environ[0] == NULL){
890
if(execv(filename, p->argv) < 0){
891
perror("execv");
892
_exit(EXIT_FAILURE);
893
}
894
} else {
895
if(execve(filename, p->argv, p->environ) < 0){
896
perror("execve");
897
_exit(EXIT_FAILURE);
898
}
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);
899
1083
}
900
1084
/* no return */
901
1085
}
902
1086
/* Parent process */
903
1087
close(pipefd[1]); /* Close unused write end of pipe */
904
free(filename);
905
plugin *new_plugin = getplugin(dirst->d_name);
1088
close(plugin_fd);
1089
plugin *new_plugin = getplugin(direntries[i]->d_name);
906
1090
if(new_plugin == NULL){
907
perror("getplugin");
908
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)));
909
1095
if(ret < 0){
910
perror("sigprocmask");
1096
error(0, errno, "sigprocmask");
911
1097
}
912
exitstatus = EXIT_FAILURE;
1098
exitstatus = EX_OSERR;
1099
free(direntries[i]);
913
1100
goto fallback;
914
1101
}
1102
free(direntries[i]);
915
1103
916
1104
new_plugin->pid = pid;
917
1105
new_plugin->fd = pipefd[0];
918
1106
919
1107
/* Unblock SIGCHLD so signal handler can be run if this process
920
1108
has already completed */
921
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));
922
1112
if(ret < 0){
923
perror("sigprocmask");
924
exitstatus = EXIT_FAILURE;
1113
error(0, errno, "sigprocmask");
1114
exitstatus = EX_OSERR;
925
1115
goto fallback;
926
1116
}
927
1117
928
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
929
1132
930
1133
if(maxfd < new_plugin->fd){
931
1134
maxfd = new_plugin->fd;
932
1135
}
933
1136
}
934
1137
935
closedir(dir);
936
dir = NULL;
1138
free(direntries);
1139
direntries = NULL;
1140
close(dir_fd);
1141
dir_fd = -1;
1142
free_plugin(getplugin(NULL));
937
1143
938
1144
for(plugin *p = plugin_list; p != NULL; p = p->next){
939
1145
if(p->pid != 0){
950
1156
while(plugin_list){
951
1157
fd_set rfds = rfds_all;
952
1158
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1159
if(select_ret == -1 and errno != EINTR){
1160
error(0, errno, "select");
1161
exitstatus = EX_OSERR;
956
1162
goto fallback;
957
1163
}
958
1164
/* OK, now either a process completed, or something can be read
959
1165
from one of them */
960
1166
for(plugin *proc = plugin_list; proc != NULL;){
961
1167
/* Is this process completely done? */
962
if(proc->eof and proc->completed){
1168
if(proc->completed and proc->eof){
963
1169
/* Only accept the plugin output if it exited cleanly */
964
1170
if(not WIFEXITED(proc->status)
965
1171
or WEXITSTATUS(proc->status) != 0){
966
1172
/* Bad exit by plugin */
967
1173
968
1174
if(debug){
969
1175
if(WIFEXITED(proc->status)){
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %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),
972
1179
WEXITSTATUS(proc->status));
973
} else if(WIFSIGNALED(proc->status)) {
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
976
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)));
977
1186
} else if(WCOREDUMP(proc->status)){
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(intmax_t) (proc->pid));
1187
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1188
" core\n", proc->name, (intmax_t) (proc->pid));
980
1189
}
981
1190
}
982
1191
983
1192
/* Remove the plugin */
984
FD_CLR(proc->fd, &rfds_all);
985
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
986
1208
/* Block signal while modifying process_list */
987
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));
988
1213
if(ret < 0){
989
perror("sigprocmask");
990
exitstatus = EXIT_FAILURE;
1214
error(0, errno, "sigprocmask");
1215
exitstatus = EX_OSERR;
991
1216
goto fallback;
992
1217
}
993
1218
996
1221
proc = next_plugin;
997
1222
998
1223
/* We are done modifying process list, so unblock signal */
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1000
NULL);
1224
ret = (int)(TEMP_FAILURE_RETRY
1225
(sigprocmask(SIG_UNBLOCK,
1226
&sigchld_action.sa_mask, NULL)));
1001
1227
if(ret < 0){
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1228
error(0, errno, "sigprocmask");
1229
exitstatus = EX_OSERR;
1004
1230
goto fallback;
1005
1231
}
1006
1232
1016
1242
bool bret = print_out_password(proc->buffer,
1017
1243
proc->buffer_length);
1018
1244
if(not bret){
1019
perror("print_out_password");
1020
exitstatus = EXIT_FAILURE;
1245
error(0, errno, "print_out_password");
1246
exitstatus = EX_IOERR;
1021
1247
}
1022
1248
goto fallback;
1023
1249
}
1024
1250
1025
1251
/* This process has not completed. Does it have any output? */
1026
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
1027
1269
/* This process had nothing to say at this time */
1028
1270
proc = proc->next;
1029
1271
continue;
1030
1272
}
1031
1273
/* Before reading, make the process' data buffer large enough */
1032
1274
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1033
proc->buffer = realloc(proc->buffer, proc->buffer_size
1034
+ (size_t) BUFFER_SIZE);
1035
if(proc->buffer == NULL){
1036
perror("malloc");
1037
exitstatus = EXIT_FAILURE;
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;
1038
1280
goto fallback;
1039
1281
}
1282
proc->buffer = new_buffer;
1040
1283
proc->buffer_size += BUFFER_SIZE;
1041
1284
}
1042
1285
/* Read from the process */
1043
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1044
BUFFER_SIZE);
1286
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1287
proc->buffer
1288
+ proc->buffer_length,
1289
BUFFER_SIZE));
1045
1290
if(sret < 0){
1046
1291
/* Read error from this process; ignore the error */
1047
1292
proc = proc->next;
1055
1300
}
1056
1301
}
1057
1302
}
1058
1059
1303
1304
1060
1305
fallback:
1061
1306
1062
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1307
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1308
and exitstatus != EX_OK)){
1063
1309
/* Fallback if all plugins failed, none are found or an error
1064
1310
occured */
1065
1311
bool bret;
1073
1319
}
1074
1320
bret = print_out_password(passwordbuffer, len);
1075
1321
if(not bret){
1076
perror("print_out_password");
1077
exitstatus = EXIT_FAILURE;
1322
error(0, errno, "print_out_password");
1323
exitstatus = EX_IOERR;
1078
1324
}
1079
1325
}
1080
1326
1081
1327
/* Restore old signal handler */
1082
1328
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1083
1329
if(ret == -1){
1084
perror("sigaction");
1085
exitstatus = EXIT_FAILURE;
1330
error(0, errno, "sigaction");
1331
exitstatus = EX_OSERR;
1086
1332
}
1087
1333
1088
1334
if(custom_argv != NULL){
1092
1338
free(custom_argv);
1093
1339
}
1094
1340
1095
if(dir != NULL){
1096
closedir(dir);
1341
free(direntries);
1342
1343
if(dir_fd != -1){
1344
close(dir_fd);
1097
1345
}
1098
1346
1099
1347
/* Kill the processes */
1103
1351
ret = kill(p->pid, SIGTERM);
1104
1352
if(ret == -1 and errno != ESRCH){
1105
1353
/* Set-uid proccesses might not get closed */
1106
perror("kill");
1354
error(0, errno, "kill");
1107
1355
}
1108
1356
}
1109
1357
}
1110
1358
1111
1359
/* Wait for any remaining child processes to terminate */
1112
do{
1360
do {
1113
1361
ret = wait(NULL);
1114
1362
} while(ret >= 0);
1115
1363
if(errno != ECHILD){
1116
perror("wait");
1364
error(0, errno, "wait");
1117
1365
}
1118
1366
1119
1367
free_plugin_list();
1120
1368
1121
1369
free(plugindir);
1370
free(pluginhelperdir);
1122
1371
free(argfile);
1123
1372
1124
1373
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0