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- Committer: Teddy Hogeborn
- Date: 2019-07-29 16:35:53 UTC
- Revision ID: teddy@recompile.se-20190729163553-1i442i2cbx64c537
Make tests and man page examples match
Make the tests test_manual_page_example[1-5] match exactly what is
written in the manual page, and add comments to manual page as
reminders to keep tests and manual page examples in sync.
* mandos-ctl (Test_commands_from_options.test_manual_page_example_1):
Remove "--verbose" option, since the manual does not have it as the
first example, and change assertion to match.
* mandos-ctl.xml (EXAMPLE): Add comments to all examples documenting
which test function they correspond to. Also remove unnecessary
quotes from option arguments in fourth example, and clarify language
slightly in fifth example.
Make the tests test_manual_page_example[1-5] match exactly what is
written in the manual page, and add comments to manual page as
reminders to keep tests and manual page examples in sync.
* mandos-ctl (Test_commands_from_options.test_manual_page_example_1):
Remove "--verbose" option, since the manual does not have it as the
first example, and change assertion to match.
* mandos-ctl.xml (EXAMPLE): Add comments to all examples documenting
which test function they correspond to. Also remove unnecessary
quotes from option arguments in fourth example, and clarify language
slightly in fifth example.
- files added:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files renamed:
- mandos-list => mandos-ctl
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
27
O_CLOEXEC, pipe2() */
27
28
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
29
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
30
realloc() */
30
31
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
32
#include <stdio.h> /* fileno(), fprintf(),
33
stderr, STDOUT_FILENO, fclose() */
34
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
35
WIFEXITED(), WEXITSTATUS(), wait(),
36
pid_t, uid_t, gid_t, getuid(),
37
getgid() */
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
43
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
readdir(), closedir(), dirfd() */
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
47
fcntl(), setuid(), setgid(),
48
F_GETFD, F_SETFD, FD_CLOEXEC,
49
access(), pipe(), fork(), close()
50
dup2(), STDOUT_FILENO, _exit(),
51
execv(), write(), read(),
52
close() */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_exit(), dup2(), fexecve(), read()
51
*/
53
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
56
57
#include <errno.h> /* errno */
57
58
#include <argp.h> /* struct argp_option, struct
58
59
argp_state, struct argp,
62
63
#include <signal.h> /* struct sigaction, sigemptyset(),
63
64
sigaddset(), sigaction(),
64
65
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
SIG_UNBLOCK, kill() */
66
SIG_UNBLOCK, kill(), sig_atomic_t
67
*/
66
68
#include <errno.h> /* errno, EBADF */
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() */
67
75
68
76
#define BUFFER_SIZE 256
69
77
70
78
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
71
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
72
81
73
82
const char *argp_program_version = "plugin-runner " VERSION;
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
75
84
76
85
typedef struct plugin{
77
86
char *name; /* can be NULL or any plugin name */
80
89
char **environ;
81
90
int envc;
82
91
bool disabled;
83
92
84
93
/* Variables used for running processes*/
85
94
pid_t pid;
86
95
int fd;
88
97
size_t buffer_size;
89
98
size_t buffer_length;
90
99
bool eof;
91
volatile bool completed;
92
volatile int status;
100
volatile sig_atomic_t completed;
101
int status;
93
102
struct plugin *next;
94
103
} plugin;
95
104
97
106
98
107
/* Gets an existing plugin based on name,
99
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
100
110
static plugin *getplugin(char *name){
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))){
111
/* Check for existing plugin with that name */
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
if((p->name == name)
114
or (p->name and name and (strcmp(p->name, name) == 0))){
105
115
return p;
106
116
}
107
117
}
108
118
/* Create a new plugin */
109
plugin *new_plugin = malloc(sizeof(plugin));
110
if (new_plugin == NULL){
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
123
if(new_plugin == NULL){
111
124
return NULL;
112
125
}
113
126
char *copy_name = NULL;
114
127
if(name != NULL){
115
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
116
131
if(copy_name == NULL){
132
int e = errno;
133
free(new_plugin);
134
errno = e;
117
135
return NULL;
118
136
}
119
137
}
120
138
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
139
*new_plugin = (plugin){ .name = copy_name,
140
.argc = 1,
141
.disabled = false,
142
.next = plugin_list };
125
143
126
new_plugin->argv = malloc(sizeof(char *) * 2);
127
if (new_plugin->argv == NULL){
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
147
if(new_plugin->argv == NULL){
148
int e = errno;
128
149
free(copy_name);
129
150
free(new_plugin);
151
errno = e;
130
152
return NULL;
131
153
}
132
154
new_plugin->argv[0] = copy_name;
133
155
new_plugin->argv[1] = NULL;
134
156
135
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
136
160
if(new_plugin->environ == NULL){
161
int e = errno;
137
162
free(copy_name);
138
163
free(new_plugin->argv);
139
164
free(new_plugin);
165
errno = e;
140
166
return NULL;
141
167
}
142
168
new_plugin->environ[0] = NULL;
147
173
}
148
174
149
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
150
177
static bool add_to_char_array(const char *new, char ***array,
151
178
int *len){
152
179
/* Resize the pointed-to array to hold one more pointer */
153
*array = realloc(*array, sizeof(char *)
154
* (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);
155
185
/* Malloc check */
156
if(*array == NULL){
186
if(new_array == NULL){
157
187
return false;
158
188
}
189
*array = new_array;
159
190
/* Make a copy of the new string */
160
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
161
195
if(copy == NULL){
162
196
return false;
163
197
}
170
204
}
171
205
172
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
173
208
static bool add_argument(plugin *p, const char *arg){
174
209
if(p == NULL){
175
210
return false;
178
213
}
179
214
180
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
181
217
static bool add_environment(plugin *p, const char *def, bool replace){
182
218
if(p == NULL){
183
219
return false;
185
221
/* namelen = length of name of environment variable */
186
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
187
223
/* Search for this environment variable */
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
190
226
/* It already exists */
191
227
if(replace){
192
char *new = realloc(*e, strlen(def) + 1);
193
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){
194
233
return false;
195
234
}
196
*e = new;
197
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
198
237
}
199
238
return true;
200
239
}
202
241
return add_to_char_array(def, &(p->environ), &(p->envc));
203
242
}
204
243
244
#ifndef O_CLOEXEC
205
245
/*
206
246
* Based on the example in the GNU LibC manual chapter 13.13 "File
207
247
* Descriptor Flags".
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
209
249
*/
250
__attribute__((warn_unused_result))
210
251
static int set_cloexec_flag(int fd){
211
int ret = fcntl(fd, F_GETFD, 0);
252
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
212
253
/* If reading the flags failed, return error indication now. */
213
254
if(ret < 0){
214
255
return ret;
215
256
}
216
257
/* Store modified flag word in the descriptor. */
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
259
ret | FD_CLOEXEC));
218
260
}
261
#endif /* not O_CLOEXEC */
219
262
220
263
221
264
/* Mark processes as completed when they exit, and save their exit
222
265
status. */
223
266
static void handle_sigchld(__attribute__((unused)) int sig){
267
int old_errno = errno;
224
268
while(true){
225
269
plugin *proc = plugin_list;
226
270
int status;
230
274
break;
231
275
}
232
276
if(pid == -1){
233
if (errno != ECHILD){
234
perror("waitpid");
277
if(errno == ECHILD){
278
/* No child processes */
279
break;
235
280
}
236
/* No child processes */
237
break;
281
error(0, errno, "waitpid");
238
282
}
239
283
240
284
/* A child exited, find it in process_list */
246
290
continue;
247
291
}
248
292
proc->status = status;
249
proc->completed = true;
293
proc->completed = 1;
250
294
}
295
errno = old_errno;
251
296
}
252
297
253
298
/* Prints out a password to stdout */
299
__attribute__((nonnull, warn_unused_result))
254
300
static bool print_out_password(const char *buffer, size_t length){
255
301
ssize_t ret;
256
302
for(size_t written = 0; written < length; written += (size_t)ret){
264
310
}
265
311
266
312
/* Removes and free a plugin from the plugin list */
313
__attribute__((nonnull))
267
314
static void free_plugin(plugin *plugin_node){
268
315
269
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
316
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
270
317
free(*arg);
271
318
}
319
free(plugin_node->name);
272
320
free(plugin_node->argv);
273
321
for(char **env = plugin_node->environ; *env != NULL; env++){
274
322
free(*env);
275
323
}
276
324
free(plugin_node->environ);
277
325
free(plugin_node->buffer);
278
326
279
327
/* Removes the plugin from the singly-linked list */
280
328
if(plugin_node == plugin_list){
281
329
/* First one - simple */
301
349
302
350
int main(int argc, char *argv[]){
303
351
char *plugindir = NULL;
352
char *pluginhelperdir = NULL;
304
353
char *argfile = NULL;
305
354
FILE *conffp;
306
size_t d_name_len;
307
DIR *dir = NULL;
308
struct dirent *dirst;
355
struct dirent **direntries = NULL;
309
356
struct stat st;
310
357
fd_set rfds_all;
311
358
int ret, maxfd = 0;
319
366
.sa_flags = SA_NOCLDSTOP };
320
367
char **custom_argv = NULL;
321
368
int custom_argc = 0;
369
int dir_fd = -1;
322
370
323
371
/* Establish a signal handler */
324
372
sigemptyset(&sigchld_action.sa_mask);
325
373
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
326
374
if(ret == -1){
327
perror("sigaddset");
328
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaddset");
376
exitstatus = EX_OSERR;
329
377
goto fallback;
330
378
}
331
379
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
332
380
if(ret == -1){
333
perror("sigaction");
334
exitstatus = EXIT_FAILURE;
381
error(0, errno, "sigaction");
382
exitstatus = EX_OSERR;
335
383
goto fallback;
336
384
}
337
385
369
417
.doc = "Group ID the plugins will run as", .group = 3 },
370
418
{ .name = "debug", .key = 132,
371
419
.doc = "Debug mode", .group = 4 },
420
{ .name = "plugin-helper-dir", .key = 133,
421
.arg = "DIRECTORY",
422
.doc = "Specify a different plugin helper directory",
423
.group = 2 },
424
/*
425
* These reproduce what we would get without ARGP_NO_HELP
426
*/
427
{ .name = "help", .key = '?',
428
.doc = "Give this help list", .group = -1 },
429
{ .name = "usage", .key = -3,
430
.doc = "Give a short usage message", .group = -1 },
431
{ .name = "version", .key = 'V',
432
.doc = "Print program version", .group = -1 },
372
433
{ .name = NULL }
373
434
};
374
435
375
error_t parse_opt (int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
377
switch (key) {
436
__attribute__((nonnull(3)))
437
error_t parse_opt(int key, char *arg, struct argp_state *state){
438
errno = 0;
439
switch(key){
440
char *tmp;
441
intmax_t tmp_id;
378
442
case 'g': /* --global-options */
379
if (arg != NULL){
380
char *p;
381
while((p = strsep(&arg, ",")) != NULL){
382
if(p[0] == '\0'){
383
continue;
384
}
385
if(not add_argument(getplugin(NULL), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
443
{
444
char *plugin_option;
445
while((plugin_option = strsep(&arg, ",")) != NULL){
446
if(not add_argument(getplugin(NULL), plugin_option)){
447
break;
388
448
}
389
449
}
450
errno = 0;
390
451
}
391
452
break;
392
453
case 'G': /* --global-env */
393
if(arg == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
454
if(add_environment(getplugin(NULL), arg, true)){
455
errno = 0;
398
456
}
399
457
break;
400
458
case 'o': /* --options-for */
401
if (arg != NULL){
402
char *p_name = strsep(&arg, ":");
403
if(p_name[0] == '\0' or arg == NULL){
404
break;
405
}
406
char *opt = strsep(&arg, ":");
407
if(opt[0] == '\0' or opt == NULL){
408
break;
409
}
410
char *p;
411
while((p = strsep(&opt, ",")) != NULL){
412
if(p[0] == '\0'){
413
continue;
414
}
415
if(not add_argument(getplugin(p_name), p)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
418
}
419
}
459
{
460
char *option_list = strchr(arg, ':');
461
if(option_list == NULL){
462
argp_error(state, "No colon in \"%s\"", arg);
463
errno = EINVAL;
464
break;
465
}
466
*option_list = '\0';
467
option_list++;
468
if(arg[0] == '\0'){
469
argp_error(state, "Empty plugin name");
470
errno = EINVAL;
471
break;
472
}
473
char *option;
474
while((option = strsep(&option_list, ",")) != NULL){
475
if(not add_argument(getplugin(arg), option)){
476
break;
477
}
478
}
479
errno = 0;
420
480
}
421
481
break;
422
482
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
426
483
{
427
484
char *envdef = strchr(arg, ':');
428
485
if(envdef == NULL){
486
argp_error(state, "No colon in \"%s\"", arg);
487
errno = EINVAL;
429
488
break;
430
489
}
431
490
*envdef = '\0';
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
491
envdef++;
492
if(arg[0] == '\0'){
493
argp_error(state, "Empty plugin name");
494
errno = EINVAL;
495
break;
496
}
497
if(add_environment(getplugin(arg), envdef, true)){
498
errno = 0;
434
499
}
435
500
}
436
501
break;
437
502
case 'd': /* --disable */
438
if (arg != NULL){
503
{
439
504
plugin *p = getplugin(arg);
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
505
if(p != NULL){
506
p->disabled = true;
507
errno = 0;
442
508
}
443
p->disabled = true;
444
509
}
445
510
break;
446
511
case 'e': /* --enable */
447
if (arg != NULL){
512
{
448
513
plugin *p = getplugin(arg);
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
514
if(p != NULL){
515
p->disabled = false;
516
errno = 0;
451
517
}
452
p->disabled = false;
453
518
}
454
519
break;
455
520
case 128: /* --plugin-dir */
456
521
free(plugindir);
457
522
plugindir = strdup(arg);
458
if(plugindir == NULL){
459
perror("strdup");
460
}
523
if(plugindir != NULL){
524
errno = 0;
525
}
461
526
break;
462
527
case 129: /* --config-file */
463
528
/* This is already done by parse_opt_config_file() */
464
529
break;
465
530
case 130: /* --userid */
466
/* In the GNU C library, uid_t is always unsigned int */
467
ret = sscanf(arg, "%ud", &uid);
468
if(ret != 1){
469
fprintf(stderr, "Bad user ID number: \"%s\", using %ud\n",
470
arg, uid);
531
tmp_id = strtoimax(arg, &tmp, 10);
532
if(errno != 0 or tmp == arg or *tmp != '\0'
533
or tmp_id != (uid_t)tmp_id){
534
argp_error(state, "Bad user ID number: \"%s\", using %"
535
PRIdMAX, arg, (intmax_t)uid);
536
break;
471
537
}
538
uid = (uid_t)tmp_id;
539
errno = 0;
472
540
break;
473
541
case 131: /* --groupid */
474
/* In the GNU C library, gid_t is always unsigned int */
475
ret = sscanf(arg, "%ud", &gid);
476
if(ret != 1){
477
fprintf(stderr, "Bad group ID number: \"%s\", using %ud\n",
478
arg, gid);
542
tmp_id = strtoimax(arg, &tmp, 10);
543
if(errno != 0 or tmp == arg or *tmp != '\0'
544
or tmp_id != (gid_t)tmp_id){
545
argp_error(state, "Bad group ID number: \"%s\", using %"
546
PRIdMAX, arg, (intmax_t)gid);
547
break;
479
548
}
549
gid = (gid_t)tmp_id;
550
errno = 0;
480
551
break;
481
552
case 132: /* --debug */
482
553
debug = true;
483
554
break;
555
case 133: /* --plugin-helper-dir */
556
free(pluginhelperdir);
557
pluginhelperdir = strdup(arg);
558
if(pluginhelperdir != NULL){
559
errno = 0;
560
}
561
break;
562
/*
563
* These reproduce what we would get without ARGP_NO_HELP
564
*/
565
case '?': /* --help */
566
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
567
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
568
__builtin_unreachable();
569
case -3: /* --usage */
570
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
571
argp_state_help(state, state->out_stream,
572
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
573
__builtin_unreachable();
574
case 'V': /* --version */
575
fprintf(state->out_stream, "%s\n", argp_program_version);
576
exit(EXIT_SUCCESS);
577
break;
484
578
/*
485
579
* When adding more options before this line, remember to also add a
486
580
* "case" to the "parse_opt_config_file" function below.
489
583
/* Cryptsetup always passes an argument, which is an empty
490
584
string if "none" was specified in /etc/crypttab. So if
491
585
argument was empty, we ignore it silently. */
492
if(arg[0] != '\0'){
493
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
586
if(arg[0] == '\0'){
587
break;
494
588
}
495
break;
496
case ARGP_KEY_END:
497
break;
589
#if __GNUC__ >= 7
590
__attribute__((fallthrough));
591
#else
592
/* FALLTHROUGH */
593
#endif
498
594
default:
499
595
return ARGP_ERR_UNKNOWN;
500
596
}
501
return 0;
597
return errno; /* Set to 0 at start */
502
598
}
503
599
504
600
/* This option parser is the same as parse_opt() above, except it
505
601
ignores everything but the --config-file option. */
506
error_t parse_opt_config_file (int key, char *arg,
507
__attribute__((unused))
508
struct argp_state *state) {
509
switch (key) {
602
error_t parse_opt_config_file(int key, char *arg,
603
__attribute__((unused))
604
struct argp_state *state){
605
errno = 0;
606
switch(key){
510
607
case 'g': /* --global-options */
511
608
case 'G': /* --global-env */
512
609
case 'o': /* --options-for */
518
615
case 129: /* --config-file */
519
616
free(argfile);
520
617
argfile = strdup(arg);
521
if(argfile == NULL){
522
perror("strdup");
618
if(argfile != NULL){
619
errno = 0;
523
620
}
524
break;
621
break;
525
622
case 130: /* --userid */
526
623
case 131: /* --groupid */
527
624
case 132: /* --debug */
625
case 133: /* --plugin-helper-dir */
626
case '?': /* --help */
627
case -3: /* --usage */
628
case 'V': /* --version */
528
629
case ARGP_KEY_ARG:
529
case ARGP_KEY_END:
530
630
break;
531
631
default:
532
632
return ARGP_ERR_UNKNOWN;
533
633
}
534
return 0;
634
return errno;
535
635
}
536
636
537
637
struct argp argp = { .options = options,
539
639
.args_doc = "",
540
640
.doc = "Mandos plugin runner -- Run plugins" };
541
641
542
/* Parse using the parse_opt_config_file in order to get the custom
642
/* Parse using parse_opt_config_file() in order to get the custom
543
643
config file location, if any. */
544
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
545
if (ret == ARGP_ERR_UNKNOWN){
546
fprintf(stderr, "Unknown error while parsing arguments\n");
547
exitstatus = EXIT_FAILURE;
644
ret = argp_parse(&argp, argc, argv,
645
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
646
NULL, NULL);
647
switch(ret){
648
case 0:
649
break;
650
case ENOMEM:
651
default:
652
errno = ret;
653
error(0, errno, "argp_parse");
654
exitstatus = EX_OSERR;
655
goto fallback;
656
case EINVAL:
657
exitstatus = EX_USAGE;
548
658
goto fallback;
549
659
}
550
660
552
662
argp.parser = parse_opt;
553
663
554
664
/* Open the configfile if available */
555
if (argfile == NULL){
665
if(argfile == NULL){
556
666
conffp = fopen(AFILE, "r");
557
667
} else {
558
668
conffp = fopen(argfile, "r");
559
}
669
}
560
670
if(conffp != NULL){
561
671
char *org_line = NULL;
562
672
char *p, *arg, *new_arg, *line;
563
673
size_t size = 0;
564
674
const char whitespace_delims[] = " \r\t\f\v\n";
565
675
const char comment_delim[] = "#";
566
676
567
677
custom_argc = 1;
568
678
custom_argv = malloc(sizeof(char*) * 2);
569
679
if(custom_argv == NULL){
570
perror("malloc");
571
exitstatus = EXIT_FAILURE;
680
error(0, errno, "malloc");
681
exitstatus = EX_OSERR;
572
682
goto fallback;
573
683
}
574
684
custom_argv[0] = argv[0];
575
685
custom_argv[1] = NULL;
576
686
577
687
/* for each line in the config file, strip whitespace and ignore
578
688
commented text */
579
689
while(true){
581
691
if(sret == -1){
582
692
break;
583
693
}
584
694
585
695
line = org_line;
586
696
arg = strsep(&line, comment_delim);
587
697
while((p = strsep(&arg, whitespace_delims)) != NULL){
590
700
}
591
701
new_arg = strdup(p);
592
702
if(new_arg == NULL){
593
perror("strdup");
594
exitstatus = EXIT_FAILURE;
703
error(0, errno, "strdup");
704
exitstatus = EX_OSERR;
595
705
free(org_line);
596
706
goto fallback;
597
707
}
598
708
599
709
custom_argc += 1;
600
custom_argv = realloc(custom_argv, sizeof(char *)
601
* ((unsigned int) custom_argc + 1));
602
if(custom_argv == NULL){
603
perror("realloc");
604
exitstatus = EXIT_FAILURE;
605
free(org_line);
606
goto fallback;
710
{
711
char **new_argv = realloc(custom_argv, sizeof(char *)
712
* ((size_t)custom_argc + 1));
713
if(new_argv == NULL){
714
error(0, errno, "realloc");
715
exitstatus = EX_OSERR;
716
free(new_arg);
717
free(org_line);
718
goto fallback;
719
} else {
720
custom_argv = new_argv;
721
}
607
722
}
608
723
custom_argv[custom_argc-1] = new_arg;
609
custom_argv[custom_argc] = NULL;
724
custom_argv[custom_argc] = NULL;
610
725
}
611
726
}
727
do {
728
ret = fclose(conffp);
729
} while(ret == EOF and errno == EINTR);
730
if(ret == EOF){
731
error(0, errno, "fclose");
732
exitstatus = EX_IOERR;
733
goto fallback;
734
}
612
735
free(org_line);
613
736
} else {
614
737
/* Check for harmful errors and go to fallback. Other errors might
615
738
not affect opening plugins */
616
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
617
perror("fopen");
618
exitstatus = EXIT_FAILURE;
739
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
740
error(0, errno, "fopen");
741
exitstatus = EX_OSERR;
619
742
goto fallback;
620
743
}
621
744
}
622
/* If there was any arguments from configuration file,
623
pass them to parser as command arguments */
745
/* If there were any arguments from the configuration file, pass
746
them to parser as command line arguments */
624
747
if(custom_argv != NULL){
625
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
626
0, NULL);
627
if (ret == ARGP_ERR_UNKNOWN){
628
fprintf(stderr, "Unknown error while parsing arguments\n");
629
exitstatus = EXIT_FAILURE;
748
ret = argp_parse(&argp, custom_argc, custom_argv,
749
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
750
NULL, NULL);
751
switch(ret){
752
case 0:
753
break;
754
case ENOMEM:
755
default:
756
errno = ret;
757
error(0, errno, "argp_parse");
758
exitstatus = EX_OSERR;
759
goto fallback;
760
case EINVAL:
761
exitstatus = EX_CONFIG;
630
762
goto fallback;
631
763
}
632
764
}
633
765
634
766
/* Parse actual command line arguments, to let them override the
635
767
config file */
636
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
637
if (ret == ARGP_ERR_UNKNOWN){
638
fprintf(stderr, "Unknown error while parsing arguments\n");
639
exitstatus = EXIT_FAILURE;
640
goto fallback;
768
ret = argp_parse(&argp, argc, argv,
769
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
770
NULL, NULL);
771
switch(ret){
772
case 0:
773
break;
774
case ENOMEM:
775
default:
776
errno = ret;
777
error(0, errno, "argp_parse");
778
exitstatus = EX_OSERR;
779
goto fallback;
780
case EINVAL:
781
exitstatus = EX_USAGE;
782
goto fallback;
783
}
784
785
{
786
char *pluginhelperenv;
787
bool bret = true;
788
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
if(ret != -1){
791
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
792
}
793
if(ret == -1 or not bret){
794
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
795
" environment variable to \"%s\" for all plugins\n",
796
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
797
}
798
if(ret != -1){
799
free(pluginhelperenv);
800
}
641
801
}
642
802
643
803
if(debug){
644
for(plugin *p = plugin_list; p != NULL; p=p->next){
804
for(plugin *p = plugin_list; p != NULL; p = p->next){
645
805
fprintf(stderr, "Plugin: %s has %d arguments\n",
646
806
p->name ? p->name : "Global", p->argc - 1);
647
807
for(char **a = p->argv; *a != NULL; a++){
648
808
fprintf(stderr, "\tArg: %s\n", *a);
649
809
}
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
810
fprintf(stderr, "...and %d environment variables\n", p->envc);
651
811
for(char **a = p->environ; *a != NULL; a++){
652
812
fprintf(stderr, "\t%s\n", *a);
653
813
}
654
814
}
655
815
}
656
816
657
/* Strip permissions down to nobody */
817
if(getuid() == 0){
818
/* Work around Debian bug #633582:
819
<https://bugs.debian.org/633582> */
820
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
821
if(plugindir_fd == -1){
822
if(errno != ENOENT){
823
error(0, errno, "open(\"" PDIR "\")");
824
}
825
} else {
826
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
827
if(ret == -1){
828
error(0, errno, "fstat");
829
} else {
830
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
831
ret = fchown(plugindir_fd, uid, gid);
832
if(ret == -1){
833
error(0, errno, "fchown");
834
}
835
}
836
}
837
close(plugindir_fd);
838
}
839
}
840
841
/* Lower permissions */
842
ret = setgid(gid);
843
if(ret == -1){
844
error(0, errno, "setgid");
845
}
658
846
ret = setuid(uid);
659
if (ret == -1){
660
perror("setuid");
661
}
662
setgid(gid);
663
if (ret == -1){
664
perror("setgid");
665
}
666
667
if (plugindir == NULL){
668
dir = opendir(PDIR);
669
} else {
670
dir = opendir(plugindir);
671
}
672
673
if(dir == NULL){
674
perror("Could not open plugin dir");
675
exitstatus = EXIT_FAILURE;
676
goto fallback;
677
}
678
679
/* Set the FD_CLOEXEC flag on the directory, if possible */
847
if(ret == -1){
848
error(0, errno, "setuid");
849
}
850
851
/* Open plugin directory with close_on_exec flag */
680
852
{
681
int dir_fd = dirfd(dir);
682
if(dir_fd >= 0){
683
ret = set_cloexec_flag(dir_fd);
684
if(ret < 0){
685
perror("set_cloexec_flag");
686
exitstatus = EXIT_FAILURE;
687
goto fallback;
853
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
854
#ifdef O_CLOEXEC
855
O_CLOEXEC
856
#else /* not O_CLOEXEC */
857
0
858
#endif /* not O_CLOEXEC */
859
);
860
if(dir_fd == -1){
861
error(0, errno, "Could not open plugin dir");
862
exitstatus = EX_UNAVAILABLE;
863
goto fallback;
864
}
865
866
#ifndef O_CLOEXEC
867
/* Set the FD_CLOEXEC flag on the directory */
868
ret = set_cloexec_flag(dir_fd);
869
if(ret < 0){
870
error(0, errno, "set_cloexec_flag");
871
exitstatus = EX_OSERR;
872
goto fallback;
873
}
874
#endif /* O_CLOEXEC */
875
}
876
877
int good_name(const struct dirent * const dirent){
878
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
879
"*.dpkg-old", "*.dpkg-bak",
880
"*.dpkg-divert", NULL };
881
#ifdef __GNUC__
882
#pragma GCC diagnostic push
883
#pragma GCC diagnostic ignored "-Wcast-qual"
884
#endif
885
for(const char **pat = (const char **)patterns;
886
*pat != NULL; pat++){
887
#ifdef __GNUC__
888
#pragma GCC diagnostic pop
889
#endif
890
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
891
!= FNM_NOMATCH){
892
if(debug){
893
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
894
" matching pattern %s\n", dirent->d_name, *pat);
895
}
896
return 0;
688
897
}
689
898
}
899
return 1;
900
}
901
902
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
903
alphasort);
904
if(numplugins == -1){
905
error(0, errno, "Could not scan plugin dir");
906
direntries = NULL;
907
exitstatus = EX_OSERR;
908
goto fallback;
690
909
}
691
910
692
911
FD_ZERO(&rfds_all);
693
912
694
913
/* Read and execute any executable in the plugin directory*/
695
while(true){
696
dirst = readdir(dir);
697
698
/* All directory entries have been processed */
699
if(dirst == NULL){
700
if (errno == EBADF){
701
perror("readdir");
702
exitstatus = EXIT_FAILURE;
703
goto fallback;
704
}
705
break;
706
}
707
708
d_name_len = strlen(dirst->d_name);
709
710
/* Ignore dotfiles, backup files and other junk */
711
{
712
bool bad_name = false;
713
714
const char const *bad_prefixes[] = { ".", "#", NULL };
715
716
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
717
".dpkg-old",
718
".dpkg-bak",
719
".dpkg-divert", NULL };
720
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
721
size_t pre_len = strlen(*pre);
722
if((d_name_len >= pre_len)
723
and strncmp((dirst->d_name), *pre, pre_len) == 0){
724
if(debug){
725
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
726
" with bad prefix %s\n", dirst->d_name, *pre);
727
}
728
bad_name = true;
729
break;
730
}
731
}
732
if(bad_name){
733
continue;
734
}
735
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
736
size_t suf_len = strlen(*suf);
737
if((d_name_len >= suf_len)
738
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
739
== 0)){
740
if(debug){
741
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
742
" with bad suffix %s\n", dirst->d_name, *suf);
743
}
744
bad_name = true;
745
break;
746
}
747
}
748
749
if(bad_name){
750
continue;
751
}
752
}
753
754
char *filename;
755
if(plugindir == NULL){
756
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
757
} else {
758
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
759
}
760
if(ret < 0){
761
perror("asprintf");
762
continue;
763
}
764
765
ret = stat(filename, &st);
766
if (ret == -1){
767
perror("stat");
768
free(filename);
769
continue;
770
}
771
914
for(int i = 0; i < numplugins; i++){
915
916
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
917
if(plugin_fd == -1){
918
error(0, errno, "Could not open plugin");
919
free(direntries[i]);
920
continue;
921
}
922
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
923
if(ret == -1){
924
error(0, errno, "stat");
925
close(plugin_fd);
926
free(direntries[i]);
927
continue;
928
}
929
772
930
/* Ignore non-executable files */
773
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
931
if(not S_ISREG(st.st_mode)
932
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
933
X_OK, 0)) != 0)){
774
934
if(debug){
775
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
776
" with bad type or mode\n", filename);
935
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
936
" with bad type or mode\n",
937
plugindir != NULL ? plugindir : PDIR,
938
direntries[i]->d_name);
777
939
}
778
free(filename);
940
close(plugin_fd);
941
free(direntries[i]);
779
942
continue;
780
943
}
781
944
782
plugin *p = getplugin(dirst->d_name);
945
plugin *p = getplugin(direntries[i]->d_name);
783
946
if(p == NULL){
784
perror("getplugin");
785
free(filename);
947
error(0, errno, "getplugin");
948
close(plugin_fd);
949
free(direntries[i]);
786
950
continue;
787
951
}
788
952
if(p->disabled){
789
953
if(debug){
790
954
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
791
dirst->d_name);
955
direntries[i]->d_name);
792
956
}
793
free(filename);
957
close(plugin_fd);
958
free(direntries[i]);
794
959
continue;
795
960
}
796
961
{
799
964
if(g != NULL){
800
965
for(char **a = g->argv + 1; *a != NULL; a++){
801
966
if(not add_argument(p, *a)){
802
perror("add_argument");
967
error(0, errno, "add_argument");
803
968
}
804
969
}
805
970
/* Add global environment variables */
806
971
for(char **e = g->environ; *e != NULL; e++){
807
972
if(not add_environment(p, *e, false)){
808
perror("add_environment");
973
error(0, errno, "add_environment");
809
974
}
810
975
}
811
976
}
812
977
}
813
/* If this plugin has any environment variables, we will call
814
using execve and need to duplicate the environment from this
815
process, too. */
978
/* If this plugin has any environment variables, we need to
979
duplicate the environment from this process, too. */
816
980
if(p->environ[0] != NULL){
817
981
for(char **e = environ; *e != NULL; e++){
818
982
if(not add_environment(p, *e, false)){
819
perror("add_environment");
983
error(0, errno, "add_environment");
820
984
}
821
985
}
822
986
}
823
987
824
988
int pipefd[2];
825
ret = pipe(pipefd);
826
if (ret == -1){
827
perror("pipe");
828
exitstatus = EXIT_FAILURE;
829
goto fallback;
830
}
989
#ifndef O_CLOEXEC
990
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
991
#else /* O_CLOEXEC */
992
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
993
#endif /* O_CLOEXEC */
994
if(ret == -1){
995
error(0, errno, "pipe");
996
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
goto fallback;
999
}
1000
if(pipefd[0] >= FD_SETSIZE){
1001
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1002
FD_SETSIZE);
1003
close(pipefd[0]);
1004
close(pipefd[1]);
1005
exitstatus = EX_OSERR;
1006
free(direntries[i]);
1007
goto fallback;
1008
}
1009
#ifndef O_CLOEXEC
831
1010
/* Ask OS to automatic close the pipe on exec */
832
1011
ret = set_cloexec_flag(pipefd[0]);
833
1012
if(ret < 0){
834
perror("set_cloexec_flag");
835
exitstatus = EXIT_FAILURE;
1013
error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
836
1018
goto fallback;
837
1019
}
838
1020
ret = set_cloexec_flag(pipefd[1]);
839
1021
if(ret < 0){
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1022
error(0, errno, "set_cloexec_flag");
1023
close(pipefd[0]);
1024
close(pipefd[1]);
1025
exitstatus = EX_OSERR;
1026
free(direntries[i]);
842
1027
goto fallback;
843
1028
}
1029
#endif /* not O_CLOEXEC */
844
1030
/* Block SIGCHLD until process is safely in process list */
845
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1031
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1032
&sigchld_action.sa_mask,
1033
NULL));
846
1034
if(ret < 0){
847
perror("sigprocmask");
848
exitstatus = EXIT_FAILURE;
1035
error(0, errno, "sigprocmask");
1036
exitstatus = EX_OSERR;
1037
free(direntries[i]);
849
1038
goto fallback;
850
1039
}
851
1040
/* Starting a new process to be watched */
852
pid_t pid = fork();
1041
pid_t pid;
1042
do {
1043
pid = fork();
1044
} while(pid == -1 and errno == EINTR);
853
1045
if(pid == -1){
854
perror("fork");
855
exitstatus = EXIT_FAILURE;
1046
error(0, errno, "fork");
1047
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1048
&sigchld_action.sa_mask, NULL));
1049
close(pipefd[0]);
1050
close(pipefd[1]);
1051
exitstatus = EX_OSERR;
1052
free(direntries[i]);
856
1053
goto fallback;
857
1054
}
858
1055
if(pid == 0){
859
1056
/* this is the child process */
860
1057
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
861
1058
if(ret < 0){
862
perror("sigaction");
863
_exit(EXIT_FAILURE);
1059
error(0, errno, "sigaction");
1060
_exit(EX_OSERR);
864
1061
}
865
1062
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
866
1063
if(ret < 0){
867
perror("sigprocmask");
868
_exit(EXIT_FAILURE);
1064
error(0, errno, "sigprocmask");
1065
_exit(EX_OSERR);
869
1066
}
870
1067
871
1068
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
872
1069
if(ret == -1){
873
perror("dup2");
874
_exit(EXIT_FAILURE);
1070
error(0, errno, "dup2");
1071
_exit(EX_OSERR);
875
1072
}
876
1073
877
if(dirfd(dir) < 0){
878
/* If dir has no file descriptor, we could not set FD_CLOEXEC
879
above and must now close it manually here. */
880
closedir(dir);
881
}
882
if(p->environ[0] == NULL){
883
if(execv(filename, p->argv) < 0){
884
perror("execv");
885
_exit(EXIT_FAILURE);
886
}
887
} else {
888
if(execve(filename, p->argv, p->environ) < 0){
889
perror("execve");
890
_exit(EXIT_FAILURE);
891
}
1074
if(fexecve(plugin_fd, p->argv,
1075
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1076
error(0, errno, "fexecve for %s/%s",
1077
plugindir != NULL ? plugindir : PDIR,
1078
direntries[i]->d_name);
1079
_exit(EX_OSERR);
892
1080
}
893
1081
/* no return */
894
1082
}
895
1083
/* Parent process */
896
1084
close(pipefd[1]); /* Close unused write end of pipe */
897
free(filename);
898
plugin *new_plugin = getplugin(dirst->d_name);
899
if (new_plugin == NULL){
900
perror("getplugin");
901
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1085
close(plugin_fd);
1086
plugin *new_plugin = getplugin(direntries[i]->d_name);
1087
if(new_plugin == NULL){
1088
error(0, errno, "getplugin");
1089
ret = (int)(TEMP_FAILURE_RETRY
1090
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1091
NULL)));
902
1092
if(ret < 0){
903
perror("sigprocmask");
1093
error(0, errno, "sigprocmask");
904
1094
}
905
exitstatus = EXIT_FAILURE;
1095
exitstatus = EX_OSERR;
1096
free(direntries[i]);
906
1097
goto fallback;
907
1098
}
1099
free(direntries[i]);
908
1100
909
1101
new_plugin->pid = pid;
910
1102
new_plugin->fd = pipefd[0];
911
1103
1104
if(debug){
1105
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1106
new_plugin->name, (intmax_t) (new_plugin->pid));
1107
}
1108
912
1109
/* Unblock SIGCHLD so signal handler can be run if this process
913
1110
has already completed */
914
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1111
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1112
&sigchld_action.sa_mask,
1113
NULL));
915
1114
if(ret < 0){
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1115
error(0, errno, "sigprocmask");
1116
exitstatus = EX_OSERR;
918
1117
goto fallback;
919
1118
}
920
1119
921
1120
FD_SET(new_plugin->fd, &rfds_all);
922
1121
923
if (maxfd < new_plugin->fd){
1122
if(maxfd < new_plugin->fd){
924
1123
maxfd = new_plugin->fd;
925
1124
}
926
1125
}
927
1126
928
closedir(dir);
929
dir = NULL;
1127
free(direntries);
1128
direntries = NULL;
1129
close(dir_fd);
1130
dir_fd = -1;
1131
free_plugin(getplugin(NULL));
930
1132
931
1133
for(plugin *p = plugin_list; p != NULL; p = p->next){
932
1134
if(p->pid != 0){
943
1145
while(plugin_list){
944
1146
fd_set rfds = rfds_all;
945
1147
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
946
if (select_ret == -1){
947
perror("select");
948
exitstatus = EXIT_FAILURE;
1148
if(select_ret == -1 and errno != EINTR){
1149
error(0, errno, "select");
1150
exitstatus = EX_OSERR;
949
1151
goto fallback;
950
1152
}
951
1153
/* OK, now either a process completed, or something can be read
952
1154
from one of them */
953
1155
for(plugin *proc = plugin_list; proc != NULL;){
954
1156
/* Is this process completely done? */
955
if(proc->eof and proc->completed){
1157
if(proc->completed and proc->eof){
956
1158
/* Only accept the plugin output if it exited cleanly */
957
1159
if(not WIFEXITED(proc->status)
958
1160
or WEXITSTATUS(proc->status) != 0){
959
1161
/* Bad exit by plugin */
960
1162
961
1163
if(debug){
962
1164
if(WIFEXITED(proc->status)){
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1166
" status %d\n", proc->name,
1167
(intmax_t) (proc->pid),
965
1168
WEXITSTATUS(proc->status));
966
} else if(WIFSIGNALED(proc->status)) {
967
fprintf(stderr, "Plugin %u killed by signal %d\n",
968
(unsigned int) (proc->pid),
969
WTERMSIG(proc->status));
970
} else if(WCOREDUMP(proc->status)){
971
fprintf(stderr, "Plugin %d dumped core\n",
972
(unsigned int) (proc->pid));
1169
} else if(WIFSIGNALED(proc->status)){
1170
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1171
" signal %d: %s\n", proc->name,
1172
(intmax_t) (proc->pid),
1173
WTERMSIG(proc->status),
1174
strsignal(WTERMSIG(proc->status)));
973
1175
}
974
1176
}
975
1177
976
1178
/* Remove the plugin */
977
1179
FD_CLR(proc->fd, &rfds_all);
978
1180
979
1181
/* Block signal while modifying process_list */
980
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1182
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1183
(SIG_BLOCK,
1184
&sigchld_action.sa_mask,
1185
NULL));
981
1186
if(ret < 0){
982
perror("sigprocmask");
983
exitstatus = EXIT_FAILURE;
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
984
1189
goto fallback;
985
1190
}
986
1191
989
1194
proc = next_plugin;
990
1195
991
1196
/* We are done modifying process list, so unblock signal */
992
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
993
NULL);
1197
ret = (int)(TEMP_FAILURE_RETRY
1198
(sigprocmask(SIG_UNBLOCK,
1199
&sigchld_action.sa_mask, NULL)));
994
1200
if(ret < 0){
995
perror("sigprocmask");
996
exitstatus = EXIT_FAILURE;
1201
error(0, errno, "sigprocmask");
1202
exitstatus = EX_OSERR;
997
1203
goto fallback;
998
1204
}
999
1205
1009
1215
bool bret = print_out_password(proc->buffer,
1010
1216
proc->buffer_length);
1011
1217
if(not bret){
1012
perror("print_out_password");
1013
exitstatus = EXIT_FAILURE;
1218
error(0, errno, "print_out_password");
1219
exitstatus = EX_IOERR;
1014
1220
}
1015
1221
goto fallback;
1016
1222
}
1023
1229
}
1024
1230
/* Before reading, make the process' data buffer large enough */
1025
1231
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1026
proc->buffer = realloc(proc->buffer, proc->buffer_size
1027
+ (size_t) BUFFER_SIZE);
1028
if (proc->buffer == NULL){
1029
perror("malloc");
1030
exitstatus = EXIT_FAILURE;
1232
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1233
+ (size_t) BUFFER_SIZE);
1234
if(new_buffer == NULL){
1235
error(0, errno, "malloc");
1236
exitstatus = EX_OSERR;
1031
1237
goto fallback;
1032
1238
}
1239
proc->buffer = new_buffer;
1033
1240
proc->buffer_size += BUFFER_SIZE;
1034
1241
}
1035
1242
/* Read from the process */
1036
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1037
BUFFER_SIZE);
1243
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1244
proc->buffer
1245
+ proc->buffer_length,
1246
BUFFER_SIZE));
1038
1247
if(sret < 0){
1039
1248
/* Read error from this process; ignore the error */
1040
1249
proc = proc->next;
1048
1257
}
1049
1258
}
1050
1259
}
1051
1052
1260
1261
1053
1262
fallback:
1054
1263
1055
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1264
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1265
and exitstatus != EX_OK)){
1056
1266
/* Fallback if all plugins failed, none are found or an error
1057
1267
occured */
1058
1268
bool bret;
1066
1276
}
1067
1277
bret = print_out_password(passwordbuffer, len);
1068
1278
if(not bret){
1069
perror("print_out_password");
1070
exitstatus = EXIT_FAILURE;
1279
error(0, errno, "print_out_password");
1280
exitstatus = EX_IOERR;
1071
1281
}
1072
1282
}
1073
1283
1074
1284
/* Restore old signal handler */
1075
1285
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1076
1286
if(ret == -1){
1077
perror("sigaction");
1078
exitstatus = EXIT_FAILURE;
1287
error(0, errno, "sigaction");
1288
exitstatus = EX_OSERR;
1079
1289
}
1080
1290
1081
1291
if(custom_argv != NULL){
1085
1295
free(custom_argv);
1086
1296
}
1087
1297
1088
if(dir != NULL){
1089
closedir(dir);
1298
free(direntries);
1299
1300
if(dir_fd != -1){
1301
close(dir_fd);
1090
1302
}
1091
1303
1092
1304
/* Kill the processes */
1096
1308
ret = kill(p->pid, SIGTERM);
1097
1309
if(ret == -1 and errno != ESRCH){
1098
1310
/* Set-uid proccesses might not get closed */
1099
perror("kill");
1311
error(0, errno, "kill");
1100
1312
}
1101
1313
}
1102
1314
}
1103
1315
1104
1316
/* Wait for any remaining child processes to terminate */
1105
do{
1317
do {
1106
1318
ret = wait(NULL);
1107
1319
} while(ret >= 0);
1108
1320
if(errno != ECHILD){
1109
perror("wait");
1321
error(0, errno, "wait");
1110
1322
}
1111
1323
1112
1324
free_plugin_list();
1113
1325
1114
1326
free(plugindir);
1327
free(pluginhelperdir);
1115
1328
free(argfile);
1116
1329
1117
1330
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0