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- Committer: Teddy Hogeborn
- Date: 2008-12-10 01:26:02 UTC
- mfrom: (237.1.2 mandos)
- Revision ID: teddy@fukt.bsnet.se-20081210012602-vhz3h75xkj24t340
First version of a somewhat complete D-Bus server interface. Also
change user/group name to "_mandos".
* debian/mandos.postinst: Rename old "mandos" user and group to
"_mandos"; create "_mandos" user and group
if none exist.
* debian/mandos-client.postinst: - '' -
* initramfs-tools-hook: Try "_mandos" before "mandos" as user and
group name.
* mandos (_datetime_to_dbus_struct): New; was previously local.
(Client.started): Renamed to "last_started". All users changed.
(Client.started): New; boolean.
(Client.dbus_object_path): New.
(Client.check_command): Renamed to "checker_command". All users
changed.
(Client.__init__): Set and use "self.dbus_object_path". Set
"self.started".
(Client.start): Update "self.started". Emit "self.PropertyChanged"
signals for both "started" and "last_started".
(Client.stop): Update "self.started". Emit "self.PropertyChanged"
signal for "started".
(Client.checker_callback): Take additional "command" argument. All
callers changed. Emit
"self.PropertyChanged" signal.
(Client.bump_timeout): Emit "self.PropertyChanged" signal for
"last_checked_ok".
(Client.start_checker): Emit "self.PropertyChanged" signal for
"checker_running".
(Client.stop_checker): Emit "self.PropertyChanged" signal for
"checker_running".
(Client.still_valid): Bug fix: use "getattr(self, started, False)"
instead of "self.started" in case this client
object is so new that the "started" attribute
has not been created yet.
(Client.IntervalChanged, Client.CheckerIsRunning, Client.GetChecker,
Client.GetCreated, Client.GetFingerprint, Client.GetHost,
Client.GetInterval, Client.GetName, Client.GetStarted,
Client.GetTimeout, Client.StateChanged, Client.TimeoutChanged):
Removed; all callers changed.
(Client.CheckerCompleted): Add "condition" and "command" arguments.
All callers changed.
(Client.GetAllProperties, Client.PropertyChanged): New.
(Client.StillValid): Renamed to "IsStillValid".
(Client.StartChecker): Changed to its own function to avoid the
return value from "Client.start_checker()".
(Client.Stop): Changed to its own function to avoid the return value
from "Client.stop()".
(main): Try "_mandos" before "mandos" as user and group name.
Removed inner function "remove_from_clients". New inner
class "MandosServer".
change user/group name to "_mandos".
* debian/mandos.postinst: Rename old "mandos" user and group to
"_mandos"; create "_mandos" user and group
if none exist.
* debian/mandos-client.postinst: - '' -
* initramfs-tools-hook: Try "_mandos" before "mandos" as user and
group name.
* mandos (_datetime_to_dbus_struct): New; was previously local.
(Client.started): Renamed to "last_started". All users changed.
(Client.started): New; boolean.
(Client.dbus_object_path): New.
(Client.check_command): Renamed to "checker_command". All users
changed.
(Client.__init__): Set and use "self.dbus_object_path". Set
"self.started".
(Client.start): Update "self.started". Emit "self.PropertyChanged"
signals for both "started" and "last_started".
(Client.stop): Update "self.started". Emit "self.PropertyChanged"
signal for "started".
(Client.checker_callback): Take additional "command" argument. All
callers changed. Emit
"self.PropertyChanged" signal.
(Client.bump_timeout): Emit "self.PropertyChanged" signal for
"last_checked_ok".
(Client.start_checker): Emit "self.PropertyChanged" signal for
"checker_running".
(Client.stop_checker): Emit "self.PropertyChanged" signal for
"checker_running".
(Client.still_valid): Bug fix: use "getattr(self, started, False)"
instead of "self.started" in case this client
object is so new that the "started" attribute
has not been created yet.
(Client.IntervalChanged, Client.CheckerIsRunning, Client.GetChecker,
Client.GetCreated, Client.GetFingerprint, Client.GetHost,
Client.GetInterval, Client.GetName, Client.GetStarted,
Client.GetTimeout, Client.StateChanged, Client.TimeoutChanged):
Removed; all callers changed.
(Client.CheckerCompleted): Add "condition" and "command" arguments.
All callers changed.
(Client.GetAllProperties, Client.PropertyChanged): New.
(Client.StillValid): Renamed to "IsStillValid".
(Client.StartChecker): Changed to its own function to avoid the
return value from "Client.start_checker()".
(Client.Stop): Changed to its own function to avoid the return value
from "Client.stop()".
(main): Try "_mandos" before "mandos" as user and group name.
Removed inner function "remove_from_clients". New inner
class "MandosServer".
- files added:
- debian/mandos-client.config
- files removed:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 Björn Påhlsson
5
* Copyright © 2008 Teddy Hogeborn
6
* Copyright © 2008 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@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
O_CLOEXEC */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* DIR, fdopendir(), fstat(), struct
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), getgid(),
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
45
readdir(), closedir(), dirfd() */
47
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
48
FD_CLOEXEC, write(), STDOUT_FILENO,
49
struct stat, fstat(), close(),
50
setgid(), setuid(), S_ISREG(),
51
faccessat() pipe(), fork(),
52
_exit(), dup2(), fexecve(), read()
53
*/
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() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC, openat() */
56
#include <string.h> /* strsep, strlen(), strsignal(),
57
strcmp(), strncmp() */
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
64
62
#include <signal.h> /* struct sigaction, sigemptyset(),
65
63
sigaddset(), sigaction(),
66
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
SIG_UNBLOCK, kill() */
69
66
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
75
67
76
68
#define BUFFER_SIZE 256
77
69
79
71
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
72
81
73
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
75
84
76
typedef struct plugin{
85
77
char *name; /* can be NULL or any plugin name */
88
80
char **environ;
89
81
int envc;
90
82
bool disabled;
91
83
92
84
/* Variables used for running processes*/
93
85
pid_t pid;
94
86
int fd;
96
88
size_t buffer_size;
97
89
size_t buffer_length;
98
90
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
91
volatile bool completed;
92
volatile int status;
101
93
struct plugin *next;
102
94
} plugin;
103
95
105
97
106
98
/* Gets an existing plugin based on name,
107
99
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
100
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
111
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
if((p->name == name)
113
or (p->name and name and (strcmp(p->name, name) == 0))){
101
/* Check for exiting plugin with that name */
102
for (plugin *p = plugin_list; p != NULL; p = p->next){
103
if ((p->name == name)
104
or (p->name and name and (strcmp(p->name, name) == 0))){
114
105
return p;
115
106
}
116
107
}
117
108
/* Create a new plugin */
118
plugin *new_plugin = NULL;
119
do {
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
122
if(new_plugin == NULL){
109
plugin *new_plugin = malloc(sizeof(plugin));
110
if (new_plugin == NULL){
123
111
return NULL;
124
112
}
125
113
char *copy_name = NULL;
126
114
if(name != NULL){
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
115
copy_name = strdup(name);
130
116
if(copy_name == NULL){
131
int e = errno;
132
free(new_plugin);
133
errno = e;
134
117
return NULL;
135
118
}
136
119
}
137
120
138
*new_plugin = (plugin){ .name = copy_name,
139
.argc = 1,
140
.disabled = false,
141
.next = plugin_list };
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
142
125
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
146
if(new_plugin->argv == NULL){
147
int e = errno;
126
new_plugin->argv = malloc(sizeof(char *) * 2);
127
if (new_plugin->argv == NULL){
148
128
free(copy_name);
149
129
free(new_plugin);
150
errno = e;
151
130
return NULL;
152
131
}
153
132
new_plugin->argv[0] = copy_name;
154
133
new_plugin->argv[1] = NULL;
155
134
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
135
new_plugin->environ = malloc(sizeof(char *));
159
136
if(new_plugin->environ == NULL){
160
int e = errno;
161
137
free(copy_name);
162
138
free(new_plugin->argv);
163
139
free(new_plugin);
164
errno = e;
165
140
return NULL;
166
141
}
167
142
new_plugin->environ[0] = NULL;
172
147
}
173
148
174
149
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
150
static bool add_to_char_array(const char *new, char ***array,
177
151
int *len){
178
152
/* Resize the pointed-to array to hold one more pointer */
179
char **new_array = NULL;
180
do {
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} while(new_array == NULL and errno == EINTR);
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
184
155
/* Malloc check */
185
if(new_array == NULL){
156
if(*array == NULL){
186
157
return false;
187
158
}
188
*array = new_array;
189
159
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
160
char *copy = strdup(new);
194
161
if(copy == NULL){
195
162
return false;
196
163
}
203
170
}
204
171
205
172
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
173
static bool add_argument(plugin *p, const char *arg){
208
174
if(p == NULL){
209
175
return false;
212
178
}
213
179
214
180
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
181
static bool add_environment(plugin *p, const char *def, bool replace){
217
182
if(p == NULL){
218
183
return false;
220
185
/* namelen = length of name of environment variable */
221
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
187
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
225
190
/* It already exists */
226
191
if(replace){
227
char *new_envdef;
228
do {
229
new_envdef = realloc(*envdef, strlen(def) + 1);
230
} while(new_envdef == NULL and errno == EINTR);
231
if(new_envdef == NULL){
192
char *new = realloc(*e, strlen(def) + 1);
193
if(new == NULL){
232
194
return false;
233
195
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
196
*e = new;
197
strcpy(*e, def);
236
198
}
237
199
return true;
238
200
}
243
205
/*
244
206
* Based on the example in the GNU LibC manual chapter 13.13 "File
245
207
* Descriptor Flags".
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
247
209
*/
248
__attribute__((warn_unused_result))
249
210
static int set_cloexec_flag(int fd){
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
int ret = fcntl(fd, F_GETFD, 0);
251
212
/* If reading the flags failed, return error indication now. */
252
213
if(ret < 0){
253
214
return ret;
254
215
}
255
216
/* Store modified flag word in the descriptor. */
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
257
ret | FD_CLOEXEC));
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
218
}
259
219
260
220
261
221
/* Mark processes as completed when they exit, and save their exit
262
222
status. */
263
223
static void handle_sigchld(__attribute__((unused)) int sig){
264
int old_errno = errno;
265
224
while(true){
266
225
plugin *proc = plugin_list;
267
226
int status;
271
230
break;
272
231
}
273
232
if(pid == -1){
274
if(errno == ECHILD){
275
/* No child processes */
276
break;
233
if (errno != ECHILD){
234
perror("waitpid");
277
235
}
278
error(0, errno, "waitpid");
236
/* No child processes */
237
break;
279
238
}
280
239
281
240
/* A child exited, find it in process_list */
287
246
continue;
288
247
}
289
248
proc->status = status;
290
proc->completed = 1;
249
proc->completed = true;
291
250
}
292
errno = old_errno;
293
251
}
294
252
295
253
/* Prints out a password to stdout */
296
__attribute__((nonnull, warn_unused_result))
297
254
static bool print_out_password(const char *buffer, size_t length){
298
255
ssize_t ret;
299
256
for(size_t written = 0; written < length; written += (size_t)ret){
307
264
}
308
265
309
266
/* Removes and free a plugin from the plugin list */
310
__attribute__((nonnull))
311
267
static void free_plugin(plugin *plugin_node){
312
268
313
269
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
319
275
}
320
276
free(plugin_node->environ);
321
277
free(plugin_node->buffer);
322
278
323
279
/* Removes the plugin from the singly-linked list */
324
280
if(plugin_node == plugin_list){
325
281
/* First one - simple */
353
309
struct stat st;
354
310
fd_set rfds_all;
355
311
int ret, maxfd = 0;
356
ssize_t sret;
357
312
uid_t uid = 65534;
358
313
gid_t gid = 65534;
359
314
bool debug = false;
363
318
.sa_flags = SA_NOCLDSTOP };
364
319
char **custom_argv = NULL;
365
320
int custom_argc = 0;
366
int dir_fd;
367
321
368
322
/* Establish a signal handler */
369
323
sigemptyset(&sigchld_action.sa_mask);
370
324
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
371
325
if(ret == -1){
372
error(0, errno, "sigaddset");
373
exitstatus = EX_OSERR;
326
perror("sigaddset");
327
exitstatus = EXIT_FAILURE;
374
328
goto fallback;
375
329
}
376
330
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
377
331
if(ret == -1){
378
error(0, errno, "sigaction");
379
exitstatus = EX_OSERR;
332
perror("sigaction");
333
exitstatus = EXIT_FAILURE;
380
334
goto fallback;
381
335
}
382
336
414
368
.doc = "Group ID the plugins will run as", .group = 3 },
415
369
{ .name = "debug", .key = 132,
416
370
.doc = "Debug mode", .group = 4 },
417
/*
418
* These reproduce what we would get without ARGP_NO_HELP
419
*/
420
{ .name = "help", .key = '?',
421
.doc = "Give this help list", .group = -1 },
422
{ .name = "usage", .key = -3,
423
.doc = "Give a short usage message", .group = -1 },
424
{ .name = "version", .key = 'V',
425
.doc = "Print program version", .group = -1 },
426
371
{ .name = NULL }
427
372
};
428
373
429
__attribute__((nonnull(3)))
430
error_t parse_opt(int key, char *arg, struct argp_state *state){
431
errno = 0;
432
switch(key){
433
char *tmp;
434
intmax_t tmp_id;
374
error_t parse_opt (int key, char *arg, __attribute__((unused))
375
struct argp_state *state) {
376
switch (key) {
435
377
case 'g': /* --global-options */
436
{
437
char *plugin_option;
438
while((plugin_option = strsep(&arg, ",")) != NULL){
439
if(not add_argument(getplugin(NULL), plugin_option)){
440
break;
378
if (arg != NULL){
379
char *p;
380
while((p = strsep(&arg, ",")) != NULL){
381
if(p[0] == '\0'){
382
continue;
383
}
384
if(not add_argument(getplugin(NULL), p)){
385
perror("add_argument");
386
return ARGP_ERR_UNKNOWN;
441
387
}
442
388
}
443
errno = 0;
444
389
}
445
390
break;
446
391
case 'G': /* --global-env */
447
if(add_environment(getplugin(NULL), arg, true)){
448
errno = 0;
392
if(arg == NULL){
393
break;
394
}
395
if(not add_environment(getplugin(NULL), arg, true)){
396
perror("add_environment");
449
397
}
450
398
break;
451
399
case 'o': /* --options-for */
452
{
453
char *option_list = strchr(arg, ':');
454
if(option_list == NULL){
455
argp_error(state, "No colon in \"%s\"", arg);
456
errno = EINVAL;
457
break;
458
}
459
*option_list = '\0';
460
option_list++;
461
if(arg[0] == '\0'){
462
argp_error(state, "Empty plugin name");
463
errno = EINVAL;
464
break;
465
}
466
char *option;
467
while((option = strsep(&option_list, ",")) != NULL){
468
if(not add_argument(getplugin(arg), option)){
469
break;
470
}
471
}
472
errno = 0;
400
if (arg != NULL){
401
char *p_name = strsep(&arg, ":");
402
if(p_name[0] == '\0' or arg == NULL){
403
break;
404
}
405
char *opt = strsep(&arg, ":");
406
if(opt[0] == '\0' or opt == NULL){
407
break;
408
}
409
char *p;
410
while((p = strsep(&opt, ",")) != NULL){
411
if(p[0] == '\0'){
412
continue;
413
}
414
if(not add_argument(getplugin(p_name), p)){
415
perror("add_argument");
416
return ARGP_ERR_UNKNOWN;
417
}
418
}
473
419
}
474
420
break;
475
421
case 'E': /* --env-for */
422
if(arg == NULL){
423
break;
424
}
476
425
{
477
426
char *envdef = strchr(arg, ':');
478
427
if(envdef == NULL){
479
argp_error(state, "No colon in \"%s\"", arg);
480
errno = EINVAL;
481
428
break;
482
429
}
483
430
*envdef = '\0';
484
envdef++;
485
if(arg[0] == '\0'){
486
argp_error(state, "Empty plugin name");
487
errno = EINVAL;
488
break;
489
}
490
if(add_environment(getplugin(arg), envdef, true)){
491
errno = 0;
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
492
433
}
493
434
}
494
435
break;
495
436
case 'd': /* --disable */
496
{
437
if (arg != NULL){
497
438
plugin *p = getplugin(arg);
498
if(p != NULL){
499
p->disabled = true;
500
errno = 0;
439
if(p == NULL){
440
return ARGP_ERR_UNKNOWN;
501
441
}
442
p->disabled = true;
502
443
}
503
444
break;
504
445
case 'e': /* --enable */
505
{
446
if (arg != NULL){
506
447
plugin *p = getplugin(arg);
507
if(p != NULL){
508
p->disabled = false;
509
errno = 0;
448
if(p == NULL){
449
return ARGP_ERR_UNKNOWN;
510
450
}
451
p->disabled = false;
511
452
}
512
453
break;
513
454
case 128: /* --plugin-dir */
514
455
free(plugindir);
515
456
plugindir = strdup(arg);
516
if(plugindir != NULL){
517
errno = 0;
518
}
457
if(plugindir == NULL){
458
perror("strdup");
459
}
519
460
break;
520
461
case 129: /* --config-file */
521
462
/* This is already done by parse_opt_config_file() */
522
463
break;
523
464
case 130: /* --userid */
524
tmp_id = strtoimax(arg, &tmp, 10);
525
if(errno != 0 or tmp == arg or *tmp != '\0'
526
or tmp_id != (uid_t)tmp_id){
527
argp_error(state, "Bad user ID number: \"%s\", using %"
528
PRIdMAX, arg, (intmax_t)uid);
529
break;
530
}
531
uid = (uid_t)tmp_id;
532
errno = 0;
465
uid = (uid_t)strtol(arg, NULL, 10);
533
466
break;
534
467
case 131: /* --groupid */
535
tmp_id = strtoimax(arg, &tmp, 10);
536
if(errno != 0 or tmp == arg or *tmp != '\0'
537
or tmp_id != (gid_t)tmp_id){
538
argp_error(state, "Bad group ID number: \"%s\", using %"
539
PRIdMAX, arg, (intmax_t)gid);
540
break;
541
}
542
gid = (gid_t)tmp_id;
543
errno = 0;
468
gid = (gid_t)strtol(arg, NULL, 10);
544
469
break;
545
470
case 132: /* --debug */
546
471
debug = true;
547
472
break;
548
/*
549
* These reproduce what we would get without ARGP_NO_HELP
550
*/
551
case '?': /* --help */
552
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
553
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
554
case -3: /* --usage */
555
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
556
argp_state_help(state, state->out_stream,
557
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
558
case 'V': /* --version */
559
fprintf(state->out_stream, "%s\n", argp_program_version);
560
exit(EXIT_SUCCESS);
561
break;
562
/*
563
* When adding more options before this line, remember to also add a
564
* "case" to the "parse_opt_config_file" function below.
565
*/
566
473
case ARGP_KEY_ARG:
567
474
/* Cryptsetup always passes an argument, which is an empty
568
475
string if "none" was specified in /etc/crypttab. So if
569
476
argument was empty, we ignore it silently. */
570
if(arg[0] == '\0'){
571
break;
477
if(arg[0] != '\0'){
478
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
572
479
}
480
break;
481
case ARGP_KEY_END:
482
break;
573
483
default:
574
484
return ARGP_ERR_UNKNOWN;
575
485
}
576
return errno; /* Set to 0 at start */
486
return 0;
577
487
}
578
488
579
489
/* This option parser is the same as parse_opt() above, except it
580
490
ignores everything but the --config-file option. */
581
error_t parse_opt_config_file(int key, char *arg,
582
__attribute__((unused))
583
struct argp_state *state){
584
errno = 0;
585
switch(key){
491
error_t parse_opt_config_file (int key, char *arg,
492
__attribute__((unused))
493
struct argp_state *state) {
494
switch (key) {
586
495
case 'g': /* --global-options */
587
496
case 'G': /* --global-env */
588
497
case 'o': /* --options-for */
594
503
case 129: /* --config-file */
595
504
free(argfile);
596
505
argfile = strdup(arg);
597
if(argfile != NULL){
598
errno = 0;
506
if(argfile == NULL){
507
perror("strdup");
599
508
}
600
break;
509
break;
601
510
case 130: /* --userid */
602
511
case 131: /* --groupid */
603
512
case 132: /* --debug */
604
case '?': /* --help */
605
case -3: /* --usage */
606
case 'V': /* --version */
607
513
case ARGP_KEY_ARG:
514
case ARGP_KEY_END:
608
515
break;
609
516
default:
610
517
return ARGP_ERR_UNKNOWN;
611
518
}
612
return errno;
519
return 0;
613
520
}
614
521
615
522
struct argp argp = { .options = options,
617
524
.args_doc = "",
618
525
.doc = "Mandos plugin runner -- Run plugins" };
619
526
620
/* Parse using parse_opt_config_file() in order to get the custom
527
/* Parse using the parse_opt_config_file in order to get the custom
621
528
config file location, if any. */
622
ret = argp_parse(&argp, argc, argv,
623
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
624
NULL, NULL);
625
switch(ret){
626
case 0:
627
break;
628
case ENOMEM:
629
default:
630
errno = ret;
631
error(0, errno, "argp_parse");
632
exitstatus = EX_OSERR;
633
goto fallback;
634
case EINVAL:
635
exitstatus = EX_USAGE;
529
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
530
if (ret == ARGP_ERR_UNKNOWN){
531
fprintf(stderr, "Unknown error while parsing arguments\n");
532
exitstatus = EXIT_FAILURE;
636
533
goto fallback;
637
534
}
638
535
640
537
argp.parser = parse_opt;
641
538
642
539
/* Open the configfile if available */
643
if(argfile == NULL){
540
if (argfile == NULL){
644
541
conffp = fopen(AFILE, "r");
645
542
} else {
646
543
conffp = fopen(argfile, "r");
647
}
544
}
648
545
if(conffp != NULL){
649
546
char *org_line = NULL;
650
547
char *p, *arg, *new_arg, *line;
651
548
size_t size = 0;
549
ssize_t sret;
652
550
const char whitespace_delims[] = " \r\t\f\v\n";
653
551
const char comment_delim[] = "#";
654
552
655
553
custom_argc = 1;
656
554
custom_argv = malloc(sizeof(char*) * 2);
657
555
if(custom_argv == NULL){
658
error(0, errno, "malloc");
659
exitstatus = EX_OSERR;
556
perror("malloc");
557
exitstatus = EXIT_FAILURE;
660
558
goto fallback;
661
559
}
662
560
custom_argv[0] = argv[0];
663
561
custom_argv[1] = NULL;
664
562
665
563
/* for each line in the config file, strip whitespace and ignore
666
564
commented text */
667
565
while(true){
669
567
if(sret == -1){
670
568
break;
671
569
}
672
570
673
571
line = org_line;
674
572
arg = strsep(&line, comment_delim);
675
573
while((p = strsep(&arg, whitespace_delims)) != NULL){
678
576
}
679
577
new_arg = strdup(p);
680
578
if(new_arg == NULL){
681
error(0, errno, "strdup");
682
exitstatus = EX_OSERR;
579
perror("strdup");
580
exitstatus = EXIT_FAILURE;
683
581
free(org_line);
684
582
goto fallback;
685
583
}
686
584
687
585
custom_argc += 1;
688
{
689
char **new_argv = realloc(custom_argv, sizeof(char *)
690
* ((unsigned int)
691
custom_argc + 1));
692
if(new_argv == NULL){
693
error(0, errno, "realloc");
694
exitstatus = EX_OSERR;
695
free(new_arg);
696
free(org_line);
697
goto fallback;
698
} else {
699
custom_argv = new_argv;
700
}
586
custom_argv = realloc(custom_argv, sizeof(char *)
587
* ((unsigned int) custom_argc + 1));
588
if(custom_argv == NULL){
589
perror("realloc");
590
exitstatus = EXIT_FAILURE;
591
free(org_line);
592
goto fallback;
701
593
}
702
594
custom_argv[custom_argc-1] = new_arg;
703
custom_argv[custom_argc] = NULL;
595
custom_argv[custom_argc] = NULL;
704
596
}
705
597
}
706
do {
707
ret = fclose(conffp);
708
} while(ret == EOF and errno == EINTR);
709
if(ret == EOF){
710
error(0, errno, "fclose");
711
exitstatus = EX_IOERR;
712
goto fallback;
713
}
714
598
free(org_line);
715
599
} else {
716
600
/* Check for harmful errors and go to fallback. Other errors might
717
601
not affect opening plugins */
718
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
719
error(0, errno, "fopen");
720
exitstatus = EX_OSERR;
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
603
perror("fopen");
604
exitstatus = EXIT_FAILURE;
721
605
goto fallback;
722
606
}
723
607
}
724
/* If there were any arguments from the configuration file, pass
725
them to parser as command line arguments */
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
726
610
if(custom_argv != NULL){
727
ret = argp_parse(&argp, custom_argc, custom_argv,
728
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
729
NULL, NULL);
730
switch(ret){
731
case 0:
732
break;
733
case ENOMEM:
734
default:
735
errno = ret;
736
error(0, errno, "argp_parse");
737
exitstatus = EX_OSERR;
738
goto fallback;
739
case EINVAL:
740
exitstatus = EX_CONFIG;
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
612
0, NULL);
613
if (ret == ARGP_ERR_UNKNOWN){
614
fprintf(stderr, "Unknown error while parsing arguments\n");
615
exitstatus = EXIT_FAILURE;
741
616
goto fallback;
742
617
}
743
618
}
744
619
745
620
/* Parse actual command line arguments, to let them override the
746
621
config file */
747
ret = argp_parse(&argp, argc, argv,
748
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
749
NULL, NULL);
750
switch(ret){
751
case 0:
752
break;
753
case ENOMEM:
754
default:
755
errno = ret;
756
error(0, errno, "argp_parse");
757
exitstatus = EX_OSERR;
758
goto fallback;
759
case EINVAL:
760
exitstatus = EX_USAGE;
622
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
623
if (ret == ARGP_ERR_UNKNOWN){
624
fprintf(stderr, "Unknown error while parsing arguments\n");
625
exitstatus = EXIT_FAILURE;
761
626
goto fallback;
762
627
}
763
628
768
633
for(char **a = p->argv; *a != NULL; a++){
769
634
fprintf(stderr, "\tArg: %s\n", *a);
770
635
}
771
fprintf(stderr, "...and %d environment variables\n", p->envc);
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
772
637
for(char **a = p->environ; *a != NULL; a++){
773
638
fprintf(stderr, "\t%s\n", *a);
774
639
}
775
640
}
776
641
}
777
642
778
if(getuid() == 0){
779
/* Work around Debian bug #633582:
780
<http://bugs.debian.org/633582> */
781
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
782
if(plugindir_fd == -1){
783
if(errno != ENOENT){
784
error(0, errno, "open(\"" PDIR "\")");
785
}
786
} else {
787
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
788
if(ret == -1){
789
error(0, errno, "fstat");
790
} else {
791
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
792
ret = fchown(plugindir_fd, uid, gid);
793
if(ret == -1){
794
error(0, errno, "fchown");
795
}
796
}
797
}
798
TEMP_FAILURE_RETRY(close(plugindir_fd));
799
}
800
}
801
802
/* Lower permissions */
803
ret = setgid(gid);
804
if(ret == -1){
805
error(0, errno, "setgid");
806
}
643
/* Strip permissions down to nobody */
807
644
ret = setuid(uid);
808
if(ret == -1){
809
error(0, errno, "setuid");
810
}
811
812
/* Open plugin directory with close_on_exec flag */
645
if (ret == -1){
646
perror("setuid");
647
}
648
setgid(gid);
649
if (ret == -1){
650
perror("setgid");
651
}
652
653
if (plugindir == NULL){
654
dir = opendir(PDIR);
655
} else {
656
dir = opendir(plugindir);
657
}
658
659
if(dir == NULL){
660
perror("Could not open plugin dir");
661
exitstatus = EXIT_FAILURE;
662
goto fallback;
663
}
664
665
/* Set the FD_CLOEXEC flag on the directory, if possible */
813
666
{
814
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
815
#ifdef O_CLOEXEC
816
O_CLOEXEC
817
#else /* not O_CLOEXEC */
818
0
819
#endif /* not O_CLOEXEC */
820
);
821
if(dir_fd == -1){
822
error(0, errno, "Could not open plugin dir");
823
exitstatus = EX_UNAVAILABLE;
824
goto fallback;
825
}
826
827
#ifndef O_CLOEXEC
828
/* Set the FD_CLOEXEC flag on the directory */
829
ret = set_cloexec_flag(dir_fd);
830
if(ret < 0){
831
error(0, errno, "set_cloexec_flag");
832
TEMP_FAILURE_RETRY(close(dir_fd));
833
exitstatus = EX_OSERR;
834
goto fallback;
835
}
836
#endif /* O_CLOEXEC */
837
838
dir = fdopendir(dir_fd);
839
if(dir == NULL){
840
error(0, errno, "Could not open plugin dir");
841
TEMP_FAILURE_RETRY(close(dir_fd));
842
exitstatus = EX_OSERR;
843
goto fallback;
667
int dir_fd = dirfd(dir);
668
if(dir_fd >= 0){
669
ret = set_cloexec_flag(dir_fd);
670
if(ret < 0){
671
perror("set_cloexec_flag");
672
exitstatus = EXIT_FAILURE;
673
goto fallback;
674
}
844
675
}
845
676
}
846
677
848
679
849
680
/* Read and execute any executable in the plugin directory*/
850
681
while(true){
851
do {
852
dirst = readdir(dir);
853
} while(dirst == NULL and errno == EINTR);
682
dirst = readdir(dir);
854
683
855
684
/* All directory entries have been processed */
856
685
if(dirst == NULL){
857
if(errno == EBADF){
858
error(0, errno, "readdir");
859
exitstatus = EX_IOERR;
686
if (errno == EBADF){
687
perror("readdir");
688
exitstatus = EXIT_FAILURE;
860
689
goto fallback;
861
690
}
862
691
break;
868
697
{
869
698
bool bad_name = false;
870
699
871
const char * const bad_prefixes[] = { ".", "#", NULL };
700
const char const *bad_prefixes[] = { ".", "#", NULL };
872
701
873
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
702
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
874
703
".dpkg-old",
875
704
".dpkg-bak",
876
705
".dpkg-divert", NULL };
877
#ifdef __GNUC__
878
#pragma GCC diagnostic push
879
#pragma GCC diagnostic ignored "-Wcast-qual"
880
#endif
881
for(const char **pre = (const char **)bad_prefixes;
882
*pre != NULL; pre++){
883
#ifdef __GNUC__
884
#pragma GCC diagnostic pop
885
#endif
706
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
886
707
size_t pre_len = strlen(*pre);
887
708
if((d_name_len >= pre_len)
888
709
and strncmp((dirst->d_name), *pre, pre_len) == 0){
897
718
if(bad_name){
898
719
continue;
899
720
}
900
#ifdef __GNUC__
901
#pragma GCC diagnostic push
902
#pragma GCC diagnostic ignored "-Wcast-qual"
903
#endif
904
for(const char **suf = (const char **)bad_suffixes;
905
*suf != NULL; suf++){
906
#ifdef __GNUC__
907
#pragma GCC diagnostic pop
908
#endif
721
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
909
722
size_t suf_len = strlen(*suf);
910
723
if((d_name_len >= suf_len)
911
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
724
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
912
725
== 0)){
913
726
if(debug){
914
727
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
923
736
continue;
924
737
}
925
738
}
926
927
int plugin_fd = openat(dir_fd, dirst->d_name, O_RDONLY |
928
#ifdef O_CLOEXEC
929
O_CLOEXEC
930
#else /* not O_CLOEXEC */
931
0
932
#endif /* not O_CLOEXEC */
933
);
934
if(plugin_fd == -1){
935
error(0, errno, "Could not open plugin");
936
continue;
739
740
char *filename;
741
if(plugindir == NULL){
742
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
743
} else {
744
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
937
745
}
938
#ifndef O_CLOEXEC
939
/* Set the FD_CLOEXEC flag on the plugin FD */
940
ret = set_cloexec_flag(plugin_fd);
941
746
if(ret < 0){
942
error(0, errno, "set_cloexec_flag");
943
TEMP_FAILURE_RETRY(close(plugin_fd));
944
continue;
945
}
946
#endif /* O_CLOEXEC */
947
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
948
if(ret == -1){
949
error(0, errno, "stat");
950
TEMP_FAILURE_RETRY(close(plugin_fd));
747
perror("asprintf");
951
748
continue;
952
749
}
953
750
751
ret = stat(filename, &st);
752
if (ret == -1){
753
perror("stat");
754
free(filename);
755
continue;
756
}
757
954
758
/* Ignore non-executable files */
955
if(not S_ISREG(st.st_mode)
956
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, dirst->d_name, X_OK,
957
0)) != 0)){
759
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
958
760
if(debug){
959
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
960
" with bad type or mode\n",
961
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
761
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
762
" with bad type or mode\n", filename);
962
763
}
963
TEMP_FAILURE_RETRY(close(plugin_fd));
764
free(filename);
964
765
continue;
965
766
}
966
767
967
768
plugin *p = getplugin(dirst->d_name);
968
769
if(p == NULL){
969
error(0, errno, "getplugin");
970
TEMP_FAILURE_RETRY(close(plugin_fd));
770
perror("getplugin");
771
free(filename);
971
772
continue;
972
773
}
973
774
if(p->disabled){
975
776
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
976
777
dirst->d_name);
977
778
}
978
TEMP_FAILURE_RETRY(close(plugin_fd));
779
free(filename);
979
780
continue;
980
781
}
981
782
{
984
785
if(g != NULL){
985
786
for(char **a = g->argv + 1; *a != NULL; a++){
986
787
if(not add_argument(p, *a)){
987
error(0, errno, "add_argument");
788
perror("add_argument");
988
789
}
989
790
}
990
791
/* Add global environment variables */
991
792
for(char **e = g->environ; *e != NULL; e++){
992
793
if(not add_environment(p, *e, false)){
993
error(0, errno, "add_environment");
794
perror("add_environment");
994
795
}
995
796
}
996
797
}
997
798
}
998
/* If this plugin has any environment variables, we need to
999
duplicate the environment from this process, too. */
799
/* If this plugin has any environment variables, we will call
800
using execve and need to duplicate the environment from this
801
process, too. */
1000
802
if(p->environ[0] != NULL){
1001
803
for(char **e = environ; *e != NULL; e++){
1002
804
if(not add_environment(p, *e, false)){
1003
error(0, errno, "add_environment");
805
perror("add_environment");
1004
806
}
1005
807
}
1006
808
}
1007
809
1008
810
int pipefd[2];
1009
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1010
if(ret == -1){
1011
error(0, errno, "pipe");
1012
exitstatus = EX_OSERR;
811
ret = pipe(pipefd);
812
if (ret == -1){
813
perror("pipe");
814
exitstatus = EXIT_FAILURE;
1013
815
goto fallback;
1014
816
}
1015
817
/* Ask OS to automatic close the pipe on exec */
1016
818
ret = set_cloexec_flag(pipefd[0]);
1017
819
if(ret < 0){
1018
error(0, errno, "set_cloexec_flag");
1019
exitstatus = EX_OSERR;
820
perror("set_cloexec_flag");
821
exitstatus = EXIT_FAILURE;
1020
822
goto fallback;
1021
823
}
1022
824
ret = set_cloexec_flag(pipefd[1]);
1023
825
if(ret < 0){
1024
error(0, errno, "set_cloexec_flag");
1025
exitstatus = EX_OSERR;
826
perror("set_cloexec_flag");
827
exitstatus = EXIT_FAILURE;
1026
828
goto fallback;
1027
829
}
1028
830
/* Block SIGCHLD until process is safely in process list */
1029
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1030
&sigchld_action.sa_mask,
1031
NULL));
831
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1032
832
if(ret < 0){
1033
error(0, errno, "sigprocmask");
1034
exitstatus = EX_OSERR;
833
perror("sigprocmask");
834
exitstatus = EXIT_FAILURE;
1035
835
goto fallback;
1036
836
}
1037
837
/* Starting a new process to be watched */
1038
pid_t pid;
1039
do {
1040
pid = fork();
1041
} while(pid == -1 and errno == EINTR);
838
pid_t pid = fork();
1042
839
if(pid == -1){
1043
error(0, errno, "fork");
1044
exitstatus = EX_OSERR;
840
perror("fork");
841
exitstatus = EXIT_FAILURE;
1045
842
goto fallback;
1046
843
}
1047
844
if(pid == 0){
1048
845
/* this is the child process */
1049
846
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1050
847
if(ret < 0){
1051
error(0, errno, "sigaction");
1052
_exit(EX_OSERR);
848
perror("sigaction");
849
_exit(EXIT_FAILURE);
1053
850
}
1054
851
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1055
852
if(ret < 0){
1056
error(0, errno, "sigprocmask");
1057
_exit(EX_OSERR);
853
perror("sigprocmask");
854
_exit(EXIT_FAILURE);
1058
855
}
1059
856
1060
857
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1061
858
if(ret == -1){
1062
error(0, errno, "dup2");
1063
_exit(EX_OSERR);
859
perror("dup2");
860
_exit(EXIT_FAILURE);
1064
861
}
1065
862
1066
863
if(dirfd(dir) < 0){
1068
865
above and must now close it manually here. */
1069
866
closedir(dir);
1070
867
}
1071
if(fexecve(plugin_fd, p->argv,
1072
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1073
error(0, errno, "fexecve for %s/%s",
1074
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
1075
_exit(EX_OSERR);
868
if(p->environ[0] == NULL){
869
if(execv(filename, p->argv) < 0){
870
perror("execv");
871
_exit(EXIT_FAILURE);
872
}
873
} else {
874
if(execve(filename, p->argv, p->environ) < 0){
875
perror("execve");
876
_exit(EXIT_FAILURE);
877
}
1076
878
}
1077
879
/* no return */
1078
880
}
1079
881
/* Parent process */
1080
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1081
pipe */
1082
TEMP_FAILURE_RETRY(close(plugin_fd));
882
close(pipefd[1]); /* Close unused write end of pipe */
883
free(filename);
1083
884
plugin *new_plugin = getplugin(dirst->d_name);
1084
if(new_plugin == NULL){
1085
error(0, errno, "getplugin");
1086
ret = (int)(TEMP_FAILURE_RETRY
1087
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1088
NULL)));
885
if (new_plugin == NULL){
886
perror("getplugin");
887
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
888
if(ret < 0){
1090
error(0, errno, "sigprocmask");
889
perror("sigprocmask");
1091
890
}
1092
exitstatus = EX_OSERR;
891
exitstatus = EXIT_FAILURE;
1093
892
goto fallback;
1094
893
}
1095
894
1098
897
1099
898
/* Unblock SIGCHLD so signal handler can be run if this process
1100
899
has already completed */
1101
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1102
&sigchld_action.sa_mask,
1103
NULL));
900
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1104
901
if(ret < 0){
1105
error(0, errno, "sigprocmask");
1106
exitstatus = EX_OSERR;
902
perror("sigprocmask");
903
exitstatus = EXIT_FAILURE;
1107
904
goto fallback;
1108
905
}
1109
906
1110
#if defined (__GNUC__) and defined (__GLIBC__)
1111
#if not __GLIBC_PREREQ(2, 16)
1112
#pragma GCC diagnostic push
1113
#pragma GCC diagnostic ignored "-Wsign-conversion"
1114
#endif
1115
#endif
1116
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1117
-Wconversion in GNU libc
1118
before 2.16 */
1119
#if defined (__GNUC__) and defined (__GLIBC__)
1120
#if not __GLIBC_PREREQ(2, 16)
1121
#pragma GCC diagnostic pop
1122
#endif
1123
#endif
907
FD_SET(new_plugin->fd, &rfds_all);
1124
908
1125
if(maxfd < new_plugin->fd){
909
if (maxfd < new_plugin->fd){
1126
910
maxfd = new_plugin->fd;
1127
911
}
1128
912
}
1129
913
1130
TEMP_FAILURE_RETRY(closedir(dir));
914
closedir(dir);
1131
915
dir = NULL;
1132
free_plugin(getplugin(NULL));
1133
916
1134
917
for(plugin *p = plugin_list; p != NULL; p = p->next){
1135
918
if(p->pid != 0){
1146
929
while(plugin_list){
1147
930
fd_set rfds = rfds_all;
1148
931
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1149
if(select_ret == -1 and errno != EINTR){
1150
error(0, errno, "select");
1151
exitstatus = EX_OSERR;
932
if (select_ret == -1){
933
perror("select");
934
exitstatus = EXIT_FAILURE;
1152
935
goto fallback;
1153
936
}
1154
937
/* OK, now either a process completed, or something can be read
1155
938
from one of them */
1156
939
for(plugin *proc = plugin_list; proc != NULL;){
1157
940
/* Is this process completely done? */
1158
if(proc->completed and proc->eof){
941
if(proc->eof and proc->completed){
1159
942
/* Only accept the plugin output if it exited cleanly */
1160
943
if(not WIFEXITED(proc->status)
1161
944
or WEXITSTATUS(proc->status) != 0){
1162
945
/* Bad exit by plugin */
1163
946
1164
947
if(debug){
1165
948
if(WIFEXITED(proc->status)){
1166
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1167
" status %d\n", proc->name,
1168
(intmax_t) (proc->pid),
949
fprintf(stderr, "Plugin %u exited with status %d\n",
950
(unsigned int) (proc->pid),
1169
951
WEXITSTATUS(proc->status));
1170
} else if(WIFSIGNALED(proc->status)){
1171
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1172
" signal %d: %s\n", proc->name,
1173
(intmax_t) (proc->pid),
1174
WTERMSIG(proc->status),
1175
strsignal(WTERMSIG(proc->status)));
952
} else if(WIFSIGNALED(proc->status)) {
953
fprintf(stderr, "Plugin %u killed by signal %d\n",
954
(unsigned int) (proc->pid),
955
WTERMSIG(proc->status));
1176
956
} else if(WCOREDUMP(proc->status)){
1177
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1178
" core\n", proc->name, (intmax_t) (proc->pid));
957
fprintf(stderr, "Plugin %d dumped core\n",
958
(unsigned int) (proc->pid));
1179
959
}
1180
960
}
1181
961
1182
962
/* Remove the plugin */
1183
#if defined (__GNUC__) and defined (__GLIBC__)
1184
#if not __GLIBC_PREREQ(2, 16)
1185
#pragma GCC diagnostic push
1186
#pragma GCC diagnostic ignored "-Wsign-conversion"
1187
#endif
1188
#endif
1189
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1190
-Wconversion in GNU libc
1191
before 2.16 */
1192
#if defined (__GNUC__) and defined (__GLIBC__)
1193
#if not __GLIBC_PREREQ(2, 16)
1194
#pragma GCC diagnostic pop
1195
#endif
1196
#endif
1197
963
FD_CLR(proc->fd, &rfds_all);
964
1198
965
/* Block signal while modifying process_list */
1199
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1200
(SIG_BLOCK,
1201
&sigchld_action.sa_mask,
1202
NULL));
966
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1203
967
if(ret < 0){
1204
error(0, errno, "sigprocmask");
1205
exitstatus = EX_OSERR;
968
perror("sigprocmask");
969
exitstatus = EXIT_FAILURE;
1206
970
goto fallback;
1207
971
}
1208
972
1211
975
proc = next_plugin;
1212
976
1213
977
/* We are done modifying process list, so unblock signal */
1214
ret = (int)(TEMP_FAILURE_RETRY
1215
(sigprocmask(SIG_UNBLOCK,
1216
&sigchld_action.sa_mask, NULL)));
978
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
979
NULL);
1217
980
if(ret < 0){
1218
error(0, errno, "sigprocmask");
1219
exitstatus = EX_OSERR;
981
perror("sigprocmask");
982
exitstatus = EXIT_FAILURE;
1220
983
goto fallback;
1221
984
}
1222
985
1232
995
bool bret = print_out_password(proc->buffer,
1233
996
proc->buffer_length);
1234
997
if(not bret){
1235
error(0, errno, "print_out_password");
1236
exitstatus = EX_IOERR;
998
perror("print_out_password");
999
exitstatus = EXIT_FAILURE;
1237
1000
}
1238
1001
goto fallback;
1239
1002
}
1240
1003
1241
1004
/* This process has not completed. Does it have any output? */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic push
1245
#pragma GCC diagnostic ignored "-Wsign-conversion"
1246
#endif
1247
#endif
1248
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1249
warning from
1250
-Wconversion
1251
in GNU libc
1252
before
1253
2.16 */
1254
#if defined (__GNUC__) and defined (__GLIBC__)
1255
#if not __GLIBC_PREREQ(2, 16)
1256
#pragma GCC diagnostic pop
1257
#endif
1258
#endif
1005
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1259
1006
/* This process had nothing to say at this time */
1260
1007
proc = proc->next;
1261
1008
continue;
1262
1009
}
1263
1010
/* Before reading, make the process' data buffer large enough */
1264
1011
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1265
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1266
+ (size_t) BUFFER_SIZE);
1267
if(new_buffer == NULL){
1268
error(0, errno, "malloc");
1269
exitstatus = EX_OSERR;
1012
proc->buffer = realloc(proc->buffer, proc->buffer_size
1013
+ (size_t) BUFFER_SIZE);
1014
if (proc->buffer == NULL){
1015
perror("malloc");
1016
exitstatus = EXIT_FAILURE;
1270
1017
goto fallback;
1271
1018
}
1272
proc->buffer = new_buffer;
1273
1019
proc->buffer_size += BUFFER_SIZE;
1274
1020
}
1275
1021
/* Read from the process */
1276
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1277
proc->buffer
1278
+ proc->buffer_length,
1279
BUFFER_SIZE));
1280
if(sret < 0){
1022
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1023
BUFFER_SIZE);
1024
if(ret < 0){
1281
1025
/* Read error from this process; ignore the error */
1282
1026
proc = proc->next;
1283
1027
continue;
1284
1028
}
1285
if(sret == 0){
1029
if(ret == 0){
1286
1030
/* got EOF */
1287
1031
proc->eof = true;
1288
1032
} else {
1289
proc->buffer_length += (size_t) sret;
1033
proc->buffer_length += (size_t) ret;
1290
1034
}
1291
1035
}
1292
1036
}
1293
1294
1037
1038
1295
1039
fallback:
1296
1040
1297
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1298
and exitstatus != EX_OK)){
1041
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1299
1042
/* Fallback if all plugins failed, none are found or an error
1300
1043
occured */
1301
1044
bool bret;
1309
1052
}
1310
1053
bret = print_out_password(passwordbuffer, len);
1311
1054
if(not bret){
1312
error(0, errno, "print_out_password");
1313
exitstatus = EX_IOERR;
1055
perror("print_out_password");
1056
exitstatus = EXIT_FAILURE;
1314
1057
}
1315
1058
}
1316
1059
1317
1060
/* Restore old signal handler */
1318
1061
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1319
1062
if(ret == -1){
1320
error(0, errno, "sigaction");
1321
exitstatus = EX_OSERR;
1063
perror("sigaction");
1064
exitstatus = EXIT_FAILURE;
1322
1065
}
1323
1066
1324
1067
if(custom_argv != NULL){
1339
1082
ret = kill(p->pid, SIGTERM);
1340
1083
if(ret == -1 and errno != ESRCH){
1341
1084
/* Set-uid proccesses might not get closed */
1342
error(0, errno, "kill");
1085
perror("kill");
1343
1086
}
1344
1087
}
1345
1088
}
1346
1089
1347
1090
/* Wait for any remaining child processes to terminate */
1348
do {
1091
do{
1349
1092
ret = wait(NULL);
1350
1093
} while(ret >= 0);
1351
1094
if(errno != ECHILD){
1352
error(0, errno, "wait");
1095
perror("wait");
1353
1096
}
1354
1097
1355
1098
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0