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- Committer: Teddy Hogeborn
- Date: 2021-02-04 17:59:45 UTC
- Revision ID: teddy@recompile.se-20210204175945-8druo6d88ipc1z58
Fix issue with french translation
Initial white space was missing in both msgid and msgstr of the french
translation, leading to checking tools reporing an incomplete
translation. The string is a raw key id, and therefore did not need
translation, so this was never a user-visible issue.
* debian/po/fr.po: Add missing whitespace to the id and translation
for msgid " ${key_id}".
Initial white space was missing in both msgid and msgstr of the french
translation, leading to checking tools reporing an incomplete
translation. The string is a raw key id, and therefore did not need
translation, so this was never a user-visible issue.
* debian/po/fr.po: Add missing whitespace to the id and translation
for msgid " ${key_id}".
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- 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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
6
*
7
* This program is free software: you can redistribute it and/or
8
* modify it under the terms of the GNU General Public License as
9
* published by the Free Software Foundation, either version 3 of the
10
* License, or (at your option) any later version.
11
*
12
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2021 Teddy Hogeborn
6
* Copyright © 2008-2021 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
13
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
14
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
18
* General Public License for more details.
16
19
*
17
20
* You should have received a copy of the GNU General Public License
18
* along with this program. If not, see
19
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
20
22
*
21
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
22
24
*/
23
25
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
26
#define _GNU_SOURCE /* strchrnul(), TEMP_FAILURE_RETRY(),
27
getline(), asprintf(), O_CLOEXEC,
28
scandirat(), pipe2() */
29
#include <argp.h> /* argp_program_version,
30
argp_program_bug_address,
31
struct argp_option,
32
struct argp_state, argp_error(),
33
ARGP_NO_EXIT, argp_state_help,
34
ARGP_HELP_STD_HELP,
35
ARGP_HELP_USAGE, ARGP_HELP_EXIT_OK,
36
ARGP_KEY_ARG, ARGP_ERR_UNKNOWN,
37
struct argp, argp_parse(),
38
ARGP_IN_ORDER, ARGP_NO_HELP */
39
#include <stdbool.h> /* bool, false, true */
40
#include <sys/types.h> /* pid_t, sig_atomic_t, uid_t, gid_t,
41
getuid(), setgid(), setuid() */
26
42
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
29
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
stat, waitpid(), WIFEXITED(),
34
WEXITSTATUS(), wait(), pid_t,
35
uid_t, gid_t, getuid(), getgid(),
36
dirfd() */
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
FD_SET(), FD_ISSET(), FD_CLR */
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS() */
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
44
readdir(), closedir(), dirfd() */
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
fcntl(), setuid(), setgid(),
47
F_GETFD, F_SETFD, FD_CLOEXEC,
48
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
50
execv(), write(), read(),
51
close() */
43
#include <iso646.h> /* or, and, not */
44
#include <string.h> /* strcmp(), strdup(), strchrnul(),
45
strncmp(), strlen(), strcpy(),
46
strsep(), strchr(), strsignal() */
47
#include <stdlib.h> /* malloc(), free(), reallocarray(),
48
realloc(), EXIT_SUCCESS */
49
#include <errno.h> /* errno, EINTR, ENOMEM, ECHILD,
50
error_t, EINVAL, EMFILE, ENFILE,
51
ENOENT, ESRCH */
52
#include <stdint.h> /* SIZE_MAX */
53
#define _GNU_SOURCE /* strchrnul(), TEMP_FAILURE_RETRY(),
54
getline(), asprintf(), O_CLOEXEC,
55
scandirat(), pipe2() */
56
#include <unistd.h> /* TEMP_FAILURE_RETRY(), ssize_t,
57
write(), STDOUT_FILENO, uid_t,
58
gid_t, getuid(), fchown(), close(),
59
symlink(), setgid(), setuid(),
60
faccessat(), X_OK, pipe(), pipe2(),
61
fork(), _exit(), dup2(), fexecve(),
62
read(), getpass() */
52
63
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
55
#include <errno.h> /* errno */
56
#include <argp.h> /* struct argp_option, struct
57
argp_state, struct argp,
58
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG,
60
error_t */
61
#include <signal.h> /* struct sigaction, sigemptyset(),
62
sigaddset(), sigaction(),
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
65
#include <errno.h> /* errno, EBADF */
64
FD_CLOEXEC, open(), O_RDONLY,
65
O_CLOEXEC, openat() */
66
#include <sys/wait.h> /* waitpid(), WNOHANG, WIFEXITED(),
67
WEXITSTATUS(), WIFSIGNALED(),
68
WTERMSIG(), wait() */
69
#include <error.h> /* error() */
70
#include <stdio.h> /* FILE, fprintf(), fopen(),
71
getline(), fclose(), EOF,
72
asprintf(), stderr */
73
#include <dirent.h> /* struct dirent, scandirat(),
74
alphasort() */
75
#include <sys/stat.h> /* struct stat, fstat(), S_ISDIR(),
76
lstat(), S_ISREG() */
77
#include <sys/select.h> /* fd_set, FD_ZERO(), FD_SETSIZE,
78
FD_SET(), select(), FD_CLR(),
79
FD_ISSET() */
80
#include <signal.h> /* struct sigaction, SA_NOCLDSTOP,
81
sigemptyset(), sigaddset(),
82
SIGCHLD, sigprocmask(), SIG_BLOCK,
83
SIG_UNBLOCK, kill(), SIGTERM */
84
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
85
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
86
#include <inttypes.h> /* intmax_t, strtoimax(), PRIdMAX */
87
#include <fnmatch.h> /* fnmatch(), FNM_FILE_NAME,
88
FNM_PERIOD, FNM_NOMATCH */
66
89
67
90
#define BUFFER_SIZE 256
68
91
69
92
#define PDIR "/lib/mandos/plugins.d"
93
#define PHDIR "/lib/mandos/plugin-helpers"
70
94
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
95
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
75
struct plugin;
96
const char *argp_program_version = "plugin-runner " VERSION;
97
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
98
77
99
typedef struct plugin{
78
100
char *name; /* can be NULL or any plugin name */
81
103
char **environ;
82
104
int envc;
83
105
bool disabled;
84
106
85
107
/* Variables used for running processes*/
86
108
pid_t pid;
87
109
int fd;
89
111
size_t buffer_size;
90
112
size_t buffer_length;
91
113
bool eof;
92
volatile bool completed;
93
volatile int status;
114
volatile sig_atomic_t completed;
115
int status;
94
116
struct plugin *next;
95
117
} plugin;
96
118
98
120
99
121
/* Gets an existing plugin based on name,
100
122
or if none is found, creates a new one */
123
__attribute__((warn_unused_result))
101
124
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
104
if ((p->name == name)
105
or (p->name and name and (strcmp(p->name, name) == 0))){
125
/* Check for existing plugin with that name */
126
for(plugin *p = plugin_list; p != NULL; p = p->next){
127
if((p->name == name)
128
or (p->name and name and (strcmp(p->name, name) == 0))){
106
129
return p;
107
130
}
108
131
}
109
132
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
133
plugin *new_plugin = NULL;
134
do {
135
new_plugin = malloc(sizeof(plugin));
136
} while(new_plugin == NULL and errno == EINTR);
137
if(new_plugin == NULL){
112
138
return NULL;
113
139
}
114
140
char *copy_name = NULL;
115
141
if(name != NULL){
116
copy_name = strdup(name);
142
do {
143
copy_name = strdup(name);
144
} while(copy_name == NULL and errno == EINTR);
117
145
if(copy_name == NULL){
146
int e = errno;
147
free(new_plugin);
148
errno = e;
118
149
return NULL;
119
150
}
120
151
}
121
152
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
153
*new_plugin = (plugin){ .name = copy_name,
154
.argc = 1,
155
.disabled = false,
156
.next = plugin_list };
126
157
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
158
do {
159
new_plugin->argv = malloc(sizeof(char *) * 2);
160
} while(new_plugin->argv == NULL and errno == EINTR);
161
if(new_plugin->argv == NULL){
162
int e = errno;
129
163
free(copy_name);
130
164
free(new_plugin);
165
errno = e;
131
166
return NULL;
132
167
}
133
168
new_plugin->argv[0] = copy_name;
134
169
new_plugin->argv[1] = NULL;
135
170
136
new_plugin->environ = malloc(sizeof(char *));
171
do {
172
new_plugin->environ = malloc(sizeof(char *));
173
} while(new_plugin->environ == NULL and errno == EINTR);
137
174
if(new_plugin->environ == NULL){
175
int e = errno;
138
176
free(copy_name);
139
177
free(new_plugin->argv);
140
178
free(new_plugin);
179
errno = e;
141
180
return NULL;
142
181
}
143
182
new_plugin->environ[0] = NULL;
148
187
}
149
188
150
189
/* Helper function for add_argument and add_environment */
190
__attribute__((nonnull, warn_unused_result))
151
191
static bool add_to_char_array(const char *new, char ***array,
152
192
int *len){
153
193
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
194
char **new_array = NULL;
195
do {
196
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
197
new_array = reallocarray(*array, (size_t)((*len) + 2),
198
sizeof(char *));
199
#else
200
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
201
/* overflow */
202
new_array = NULL;
203
errno = ENOMEM;
204
} else {
205
new_array = realloc(*array, (size_t)((*len) + 2)
206
* sizeof(char *));
207
}
208
#endif
209
} while(new_array == NULL and errno == EINTR);
156
210
/* Malloc check */
157
if(*array == NULL){
211
if(new_array == NULL){
158
212
return false;
159
213
}
214
*array = new_array;
160
215
/* Make a copy of the new string */
161
char *copy = strdup(new);
216
char *copy;
217
do {
218
copy = strdup(new);
219
} while(copy == NULL and errno == EINTR);
162
220
if(copy == NULL){
163
221
return false;
164
222
}
171
229
}
172
230
173
231
/* Add to a plugin's argument vector */
232
__attribute__((nonnull(2), warn_unused_result))
174
233
static bool add_argument(plugin *p, const char *arg){
175
234
if(p == NULL){
176
235
return false;
179
238
}
180
239
181
240
/* Add to a plugin's environment */
241
__attribute__((nonnull(2), warn_unused_result))
182
242
static bool add_environment(plugin *p, const char *def, bool replace){
183
243
if(p == NULL){
184
244
return false;
186
246
/* namelen = length of name of environment variable */
187
247
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
248
/* Search for this environment variable */
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen + 1) == 0){
249
for(char **envdef = p->environ; *envdef != NULL; envdef++){
250
if(strncmp(*envdef, def, namelen + 1) == 0){
191
251
/* It already exists */
192
252
if(replace){
193
char *new = realloc(*e, strlen(def) + 1);
194
if(new == NULL){
253
char *new_envdef;
254
do {
255
new_envdef = realloc(*envdef, strlen(def) + 1);
256
} while(new_envdef == NULL and errno == EINTR);
257
if(new_envdef == NULL){
195
258
return false;
196
259
}
197
*e = new;
198
strcpy(*e, def);
260
*envdef = new_envdef;
261
strcpy(*envdef, def);
199
262
}
200
263
return true;
201
264
}
203
266
return add_to_char_array(def, &(p->environ), &(p->envc));
204
267
}
205
268
269
#ifndef O_CLOEXEC
206
270
/*
207
271
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
272
* Descriptor Flags".
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
273
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
210
274
*/
211
static int set_cloexec_flag(int fd)
212
{
213
int ret = fcntl(fd, F_GETFD, 0);
275
__attribute__((warn_unused_result))
276
static int set_cloexec_flag(int fd){
277
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
278
/* If reading the flags failed, return error indication now. */
215
279
if(ret < 0){
216
280
return ret;
217
281
}
218
282
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
283
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
284
ret | FD_CLOEXEC));
220
285
}
286
#endif /* not O_CLOEXEC */
221
287
222
288
223
289
/* Mark processes as completed when they exit, and save their exit
224
290
status. */
225
void handle_sigchld(__attribute__((unused)) int sig){
291
static void handle_sigchld(__attribute__((unused)) int sig){
292
int old_errno = errno;
226
293
while(true){
227
294
plugin *proc = plugin_list;
228
295
int status;
232
299
break;
233
300
}
234
301
if(pid == -1){
235
if (errno != ECHILD){
236
perror("waitpid");
302
if(errno == ECHILD){
303
/* No child processes */
304
break;
237
305
}
238
/* No child processes */
239
break;
306
error(0, errno, "waitpid");
240
307
}
241
308
242
309
/* A child exited, find it in process_list */
248
315
continue;
249
316
}
250
317
proc->status = status;
251
proc->completed = true;
318
proc->completed = 1;
252
319
}
320
errno = old_errno;
253
321
}
254
322
255
323
/* Prints out a password to stdout */
256
bool print_out_password(const char *buffer, size_t length){
324
__attribute__((nonnull, warn_unused_result))
325
static bool print_out_password(const char *buffer, size_t length){
257
326
ssize_t ret;
258
if(length>0 and buffer[length-1] == '\n'){
259
length--;
260
}
261
327
for(size_t written = 0; written < length; written += (size_t)ret){
262
328
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
263
329
length - written));
269
335
}
270
336
271
337
/* Removes and free a plugin from the plugin list */
338
__attribute__((nonnull))
272
339
static void free_plugin(plugin *plugin_node){
273
340
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
341
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
275
342
free(*arg);
276
343
}
344
free(plugin_node->name);
277
345
free(plugin_node->argv);
278
346
for(char **env = plugin_node->environ; *env != NULL; env++){
279
347
free(*env);
280
348
}
281
349
free(plugin_node->environ);
282
350
free(plugin_node->buffer);
283
351
284
352
/* Removes the plugin from the singly-linked list */
285
353
if(plugin_node == plugin_list){
286
354
/* First one - simple */
306
374
307
375
int main(int argc, char *argv[]){
308
376
char *plugindir = NULL;
377
char *pluginhelperdir = NULL;
309
378
char *argfile = NULL;
310
379
FILE *conffp;
311
size_t d_name_len;
312
DIR *dir = NULL;
313
struct dirent *dirst;
380
struct dirent **direntries = NULL;
314
381
struct stat st;
315
382
fd_set rfds_all;
316
383
int ret, maxfd = 0;
384
ssize_t sret;
317
385
uid_t uid = 65534;
318
386
gid_t gid = 65534;
319
387
bool debug = false;
323
391
.sa_flags = SA_NOCLDSTOP };
324
392
char **custom_argv = NULL;
325
393
int custom_argc = 0;
394
int dir_fd = -1;
326
395
327
396
/* Establish a signal handler */
328
397
sigemptyset(&sigchld_action.sa_mask);
329
398
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
330
399
if(ret == -1){
331
perror("sigaddset");
332
exitstatus = EXIT_FAILURE;
400
error(0, errno, "sigaddset");
401
exitstatus = EX_OSERR;
333
402
goto fallback;
334
403
}
335
404
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
336
405
if(ret == -1){
337
perror("sigaction");
338
exitstatus = EXIT_FAILURE;
406
error(0, errno, "sigaction");
407
exitstatus = EX_OSERR;
339
408
goto fallback;
340
409
}
341
410
373
442
.doc = "Group ID the plugins will run as", .group = 3 },
374
443
{ .name = "debug", .key = 132,
375
444
.doc = "Debug mode", .group = 4 },
445
{ .name = "plugin-helper-dir", .key = 133,
446
.arg = "DIRECTORY",
447
.doc = "Specify a different plugin helper directory",
448
.group = 2 },
449
/*
450
* These reproduce what we would get without ARGP_NO_HELP
451
*/
452
{ .name = "help", .key = '?',
453
.doc = "Give this help list", .group = -1 },
454
{ .name = "usage", .key = -3,
455
.doc = "Give a short usage message", .group = -1 },
456
{ .name = "version", .key = 'V',
457
.doc = "Print program version", .group = -1 },
376
458
{ .name = NULL }
377
459
};
378
460
379
error_t parse_opt (int key, char *arg, __attribute__((unused))
380
struct argp_state *state) {
381
switch (key) {
461
__attribute__((nonnull(3)))
462
error_t parse_opt(int key, char *arg, struct argp_state *state){
463
errno = 0;
464
switch(key){
465
char *tmp;
466
intmax_t tmp_id;
382
467
case 'g': /* --global-options */
383
if (arg != NULL){
384
char *p;
385
while((p = strsep(&arg, ",")) != NULL){
386
if(p[0] == '\0'){
387
continue;
388
}
389
if(not add_argument(getplugin(NULL), p)){
390
perror("add_argument");
391
return ARGP_ERR_UNKNOWN;
468
{
469
char *plugin_option;
470
while((plugin_option = strsep(&arg, ",")) != NULL){
471
if(not add_argument(getplugin(NULL), plugin_option)){
472
break;
392
473
}
393
474
}
475
errno = 0;
394
476
}
395
477
break;
396
478
case 'G': /* --global-env */
397
if(arg == NULL){
398
break;
399
}
400
if(not add_environment(getplugin(NULL), arg, true)){
401
perror("add_environment");
479
if(add_environment(getplugin(NULL), arg, true)){
480
errno = 0;
402
481
}
403
482
break;
404
483
case 'o': /* --options-for */
405
if (arg != NULL){
406
char *p_name = strsep(&arg, ":");
407
if(p_name[0] == '\0' or arg == NULL){
408
break;
409
}
410
char *opt = strsep(&arg, ":");
411
if(opt[0] == '\0' or opt == NULL){
412
break;
413
}
414
char *p;
415
while((p = strsep(&opt, ",")) != NULL){
416
if(p[0] == '\0'){
417
continue;
418
}
419
if(not add_argument(getplugin(p_name), p)){
420
perror("add_argument");
421
return ARGP_ERR_UNKNOWN;
422
}
423
}
484
{
485
char *option_list = strchr(arg, ':');
486
if(option_list == NULL){
487
argp_error(state, "No colon in \"%s\"", arg);
488
errno = EINVAL;
489
break;
490
}
491
*option_list = '\0';
492
option_list++;
493
if(arg[0] == '\0'){
494
argp_error(state, "Empty plugin name");
495
errno = EINVAL;
496
break;
497
}
498
char *option;
499
while((option = strsep(&option_list, ",")) != NULL){
500
if(not add_argument(getplugin(arg), option)){
501
break;
502
}
503
}
504
errno = 0;
424
505
}
425
506
break;
426
507
case 'E': /* --env-for */
427
if(arg == NULL){
428
break;
429
}
430
508
{
431
509
char *envdef = strchr(arg, ':');
432
510
if(envdef == NULL){
511
argp_error(state, "No colon in \"%s\"", arg);
512
errno = EINVAL;
433
513
break;
434
514
}
435
515
*envdef = '\0';
436
if(not add_environment(getplugin(arg), envdef+1, true)){
437
perror("add_environment");
516
envdef++;
517
if(arg[0] == '\0'){
518
argp_error(state, "Empty plugin name");
519
errno = EINVAL;
520
break;
521
}
522
if(add_environment(getplugin(arg), envdef, true)){
523
errno = 0;
438
524
}
439
525
}
440
526
break;
441
527
case 'd': /* --disable */
442
if (arg != NULL){
528
{
443
529
plugin *p = getplugin(arg);
444
if(p == NULL){
445
return ARGP_ERR_UNKNOWN;
530
if(p != NULL){
531
p->disabled = true;
532
errno = 0;
446
533
}
447
p->disabled = true;
448
534
}
449
535
break;
450
536
case 'e': /* --enable */
451
if (arg != NULL){
537
{
452
538
plugin *p = getplugin(arg);
453
if(p == NULL){
454
return ARGP_ERR_UNKNOWN;
539
if(p != NULL){
540
p->disabled = false;
541
errno = 0;
455
542
}
456
p->disabled = false;
457
543
}
458
544
break;
459
545
case 128: /* --plugin-dir */
460
546
free(plugindir);
461
547
plugindir = strdup(arg);
462
if(plugindir == NULL){
463
perror("strdup");
464
}
548
if(plugindir != NULL){
549
errno = 0;
550
}
465
551
break;
466
552
case 129: /* --config-file */
467
553
/* This is already done by parse_opt_config_file() */
468
554
break;
469
555
case 130: /* --userid */
470
uid = (uid_t)strtol(arg, NULL, 10);
556
tmp_id = strtoimax(arg, &tmp, 10);
557
if(errno != 0 or tmp == arg or *tmp != '\0'
558
or tmp_id != (uid_t)tmp_id){
559
argp_error(state, "Bad user ID number: \"%s\", using %"
560
PRIdMAX, arg, (intmax_t)uid);
561
break;
562
}
563
uid = (uid_t)tmp_id;
564
errno = 0;
471
565
break;
472
566
case 131: /* --groupid */
473
gid = (gid_t)strtol(arg, NULL, 10);
567
tmp_id = strtoimax(arg, &tmp, 10);
568
if(errno != 0 or tmp == arg or *tmp != '\0'
569
or tmp_id != (gid_t)tmp_id){
570
argp_error(state, "Bad group ID number: \"%s\", using %"
571
PRIdMAX, arg, (intmax_t)gid);
572
break;
573
}
574
gid = (gid_t)tmp_id;
575
errno = 0;
474
576
break;
475
577
case 132: /* --debug */
476
578
debug = true;
477
579
break;
580
case 133: /* --plugin-helper-dir */
581
free(pluginhelperdir);
582
pluginhelperdir = strdup(arg);
583
if(pluginhelperdir != NULL){
584
errno = 0;
585
}
586
break;
587
/*
588
* These reproduce what we would get without ARGP_NO_HELP
589
*/
590
case '?': /* --help */
591
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
592
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
593
__builtin_unreachable();
594
case -3: /* --usage */
595
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
596
argp_state_help(state, state->out_stream,
597
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
598
__builtin_unreachable();
599
case 'V': /* --version */
600
fprintf(state->out_stream, "%s\n", argp_program_version);
601
exit(EXIT_SUCCESS);
602
break;
603
/*
604
* When adding more options before this line, remember to also add a
605
* "case" to the "parse_opt_config_file" function below.
606
*/
478
607
case ARGP_KEY_ARG:
479
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
480
break;
481
case ARGP_KEY_END:
482
break;
608
/* Cryptsetup always passes an argument, which is an empty
609
string if "none" was specified in /etc/crypttab. So if
610
argument was empty, we ignore it silently. */
611
if(arg[0] == '\0'){
612
break;
613
}
614
#if __GNUC__ >= 7
615
__attribute__((fallthrough));
616
#else
617
/* FALLTHROUGH */
618
#endif
483
619
default:
484
620
return ARGP_ERR_UNKNOWN;
485
621
}
486
return 0;
622
return errno; /* Set to 0 at start */
487
623
}
488
624
489
625
/* This option parser is the same as parse_opt() above, except it
490
626
ignores everything but the --config-file option. */
491
error_t parse_opt_config_file (int key, char *arg,
492
__attribute__((unused))
493
struct argp_state *state) {
494
switch (key) {
627
error_t parse_opt_config_file(int key, char *arg,
628
__attribute__((unused))
629
struct argp_state *state){
630
errno = 0;
631
switch(key){
495
632
case 'g': /* --global-options */
496
633
case 'G': /* --global-env */
497
634
case 'o': /* --options-for */
503
640
case 129: /* --config-file */
504
641
free(argfile);
505
642
argfile = strdup(arg);
506
if(argfile == NULL){
507
perror("strdup");
643
if(argfile != NULL){
644
errno = 0;
508
645
}
509
break;
646
break;
510
647
case 130: /* --userid */
511
648
case 131: /* --groupid */
512
649
case 132: /* --debug */
650
case 133: /* --plugin-helper-dir */
651
case '?': /* --help */
652
case -3: /* --usage */
653
case 'V': /* --version */
513
654
case ARGP_KEY_ARG:
514
case ARGP_KEY_END:
515
655
break;
516
656
default:
517
657
return ARGP_ERR_UNKNOWN;
518
658
}
519
return 0;
659
return errno;
520
660
}
521
661
522
662
struct argp argp = { .options = options,
524
664
.args_doc = "",
525
665
.doc = "Mandos plugin runner -- Run plugins" };
526
666
527
/* Parse using the parse_opt_config_file in order to get the custom
667
/* Parse using parse_opt_config_file() in order to get the custom
528
668
config file location, if any. */
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;
669
ret = argp_parse(&argp, argc, argv,
670
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
671
NULL, NULL);
672
switch(ret){
673
case 0:
674
break;
675
case ENOMEM:
676
default:
677
errno = ret;
678
error(0, errno, "argp_parse");
679
exitstatus = EX_OSERR;
680
goto fallback;
681
case EINVAL:
682
exitstatus = EX_USAGE;
533
683
goto fallback;
534
684
}
535
685
537
687
argp.parser = parse_opt;
538
688
539
689
/* Open the configfile if available */
540
if (argfile == NULL){
690
if(argfile == NULL){
541
691
conffp = fopen(AFILE, "r");
542
692
} else {
543
693
conffp = fopen(argfile, "r");
544
}
694
}
545
695
if(conffp != NULL){
546
696
char *org_line = NULL;
547
697
char *p, *arg, *new_arg, *line;
548
698
size_t size = 0;
549
ssize_t sret;
550
699
const char whitespace_delims[] = " \r\t\f\v\n";
551
700
const char comment_delim[] = "#";
552
701
553
702
custom_argc = 1;
554
703
custom_argv = malloc(sizeof(char*) * 2);
555
704
if(custom_argv == NULL){
556
perror("malloc");
557
exitstatus = EXIT_FAILURE;
705
error(0, errno, "malloc");
706
exitstatus = EX_OSERR;
558
707
goto fallback;
559
708
}
560
709
custom_argv[0] = argv[0];
561
710
custom_argv[1] = NULL;
562
711
563
712
/* for each line in the config file, strip whitespace and ignore
564
713
commented text */
565
714
while(true){
567
716
if(sret == -1){
568
717
break;
569
718
}
570
719
571
720
line = org_line;
572
721
arg = strsep(&line, comment_delim);
573
722
while((p = strsep(&arg, whitespace_delims)) != NULL){
576
725
}
577
726
new_arg = strdup(p);
578
727
if(new_arg == NULL){
579
perror("strdup");
580
exitstatus = EXIT_FAILURE;
728
error(0, errno, "strdup");
729
exitstatus = EX_OSERR;
581
730
free(org_line);
582
731
goto fallback;
583
732
}
584
733
585
734
custom_argc += 1;
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;
735
{
736
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
737
char **new_argv = reallocarray(custom_argv, (size_t)custom_argc + 1,
738
sizeof(char *));
739
#else
740
char **new_argv = NULL;
741
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
742
/* overflow */
743
errno = ENOMEM;
744
} else {
745
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
746
* sizeof(char *));
747
}
748
#endif
749
if(new_argv == NULL){
750
error(0, errno, "reallocarray");
751
exitstatus = EX_OSERR;
752
free(new_arg);
753
free(org_line);
754
goto fallback;
755
} else {
756
custom_argv = new_argv;
757
}
593
758
}
594
759
custom_argv[custom_argc-1] = new_arg;
595
custom_argv[custom_argc] = NULL;
760
custom_argv[custom_argc] = NULL;
596
761
}
597
762
}
763
do {
764
ret = fclose(conffp);
765
} while(ret == EOF and errno == EINTR);
766
if(ret == EOF){
767
error(0, errno, "fclose");
768
exitstatus = EX_IOERR;
769
goto fallback;
770
}
598
771
free(org_line);
599
772
} else {
600
773
/* Check for harmful errors and go to fallback. Other errors might
601
774
not affect opening plugins */
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
603
perror("fopen");
604
exitstatus = EXIT_FAILURE;
775
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
776
error(0, errno, "fopen");
777
exitstatus = EX_OSERR;
605
778
goto fallback;
606
779
}
607
780
}
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
781
/* If there were any arguments from the configuration file, pass
782
them to parser as command line arguments */
610
783
if(custom_argv != NULL){
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;
784
ret = argp_parse(&argp, custom_argc, custom_argv,
785
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
786
NULL, NULL);
787
switch(ret){
788
case 0:
789
break;
790
case ENOMEM:
791
default:
792
errno = ret;
793
error(0, errno, "argp_parse");
794
exitstatus = EX_OSERR;
795
goto fallback;
796
case EINVAL:
797
exitstatus = EX_CONFIG;
616
798
goto fallback;
617
799
}
618
800
}
619
801
620
802
/* Parse actual command line arguments, to let them override the
621
803
config file */
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;
626
goto fallback;
804
ret = argp_parse(&argp, argc, argv,
805
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
806
NULL, NULL);
807
switch(ret){
808
case 0:
809
break;
810
case ENOMEM:
811
default:
812
errno = ret;
813
error(0, errno, "argp_parse");
814
exitstatus = EX_OSERR;
815
goto fallback;
816
case EINVAL:
817
exitstatus = EX_USAGE;
818
goto fallback;
819
}
820
821
{
822
char *pluginhelperenv;
823
bool bret = true;
824
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
825
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
826
if(ret != -1){
827
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
828
}
829
if(ret == -1 or not bret){
830
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
831
" environment variable to \"%s\" for all plugins\n",
832
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
833
}
834
if(ret != -1){
835
free(pluginhelperenv);
836
}
627
837
}
628
838
629
839
if(debug){
630
for(plugin *p = plugin_list; p != NULL; p=p->next){
840
for(plugin *p = plugin_list; p != NULL; p = p->next){
631
841
fprintf(stderr, "Plugin: %s has %d arguments\n",
632
842
p->name ? p->name : "Global", p->argc - 1);
633
843
for(char **a = p->argv; *a != NULL; a++){
634
844
fprintf(stderr, "\tArg: %s\n", *a);
635
845
}
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
846
fprintf(stderr, "...and %d environment variables\n", p->envc);
637
847
for(char **a = p->environ; *a != NULL; a++){
638
848
fprintf(stderr, "\t%s\n", *a);
639
849
}
640
850
}
641
851
}
642
852
643
/* Strip permissions down to nobody */
853
if(getuid() == 0){
854
/* Work around Debian bug #633582:
855
<https://bugs.debian.org/633582> */
856
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
857
if(plugindir_fd == -1){
858
if(errno != ENOENT){
859
error(0, errno, "open(\"" PDIR "\")");
860
}
861
} else {
862
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
863
if(ret == -1){
864
error(0, errno, "fstat");
865
} else {
866
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
867
ret = fchown(plugindir_fd, uid, gid);
868
if(ret == -1){
869
error(0, errno, "fchown");
870
}
871
}
872
}
873
close(plugindir_fd);
874
}
875
876
/* Work around Debian bug #981302
877
<https://bugs.debian.org/981302> */
878
if(lstat("/dev/fd", &st) != 0 and errno == ENOENT){
879
ret = symlink("/proc/self/fd", "/dev/fd");
880
if(ret == -1){
881
error(0, errno, "Failed to create /dev/fd symlink");
882
}
883
}
884
}
885
886
/* Lower permissions */
887
ret = setgid(gid);
888
if(ret == -1){
889
error(0, errno, "setgid");
890
}
644
891
ret = setuid(uid);
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 */
892
if(ret == -1){
893
error(0, errno, "setuid");
894
}
895
896
/* Open plugin directory with close_on_exec flag */
666
897
{
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;
898
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
899
#ifdef O_CLOEXEC
900
O_CLOEXEC
901
#else /* not O_CLOEXEC */
902
0
903
#endif /* not O_CLOEXEC */
904
);
905
if(dir_fd == -1){
906
error(0, errno, "Could not open plugin dir");
907
exitstatus = EX_UNAVAILABLE;
908
goto fallback;
909
}
910
911
#ifndef O_CLOEXEC
912
/* Set the FD_CLOEXEC flag on the directory */
913
ret = set_cloexec_flag(dir_fd);
914
if(ret < 0){
915
error(0, errno, "set_cloexec_flag");
916
exitstatus = EX_OSERR;
917
goto fallback;
918
}
919
#endif /* O_CLOEXEC */
920
}
921
922
int good_name(const struct dirent * const dirent){
923
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
924
"*.dpkg-old", "*.dpkg-bak",
925
"*.dpkg-divert", NULL };
926
#ifdef __GNUC__
927
#pragma GCC diagnostic push
928
#pragma GCC diagnostic ignored "-Wcast-qual"
929
#endif
930
for(const char **pat = (const char **)patterns;
931
*pat != NULL; pat++){
932
#ifdef __GNUC__
933
#pragma GCC diagnostic pop
934
#endif
935
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
936
!= FNM_NOMATCH){
937
if(debug){
938
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
939
" matching pattern %s\n", dirent->d_name, *pat);
940
}
941
return 0;
674
942
}
675
943
}
944
return 1;
945
}
946
947
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
948
alphasort);
949
if(numplugins == -1){
950
error(0, errno, "Could not scan plugin dir");
951
direntries = NULL;
952
exitstatus = EX_OSERR;
953
goto fallback;
676
954
}
677
955
678
956
FD_ZERO(&rfds_all);
679
957
680
958
/* Read and execute any executable in the plugin directory*/
681
while(true){
682
dirst = readdir(dir);
683
684
/* All directory entries have been processed */
685
if(dirst == NULL){
686
if (errno == EBADF){
687
perror("readdir");
688
exitstatus = EXIT_FAILURE;
689
goto fallback;
690
}
691
break;
692
}
693
694
d_name_len = strlen(dirst->d_name);
695
696
/* Ignore dotfiles, backup files and other junk */
697
{
698
bool bad_name = false;
699
700
const char const *bad_prefixes[] = { ".", "#", NULL };
701
702
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
703
".dpkg-old",
704
".dpkg-divert", NULL };
705
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
706
size_t pre_len = strlen(*pre);
707
if((d_name_len >= pre_len)
708
and strncmp((dirst->d_name), *pre, pre_len) == 0){
709
if(debug){
710
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
711
" with bad prefix %s\n", dirst->d_name, *pre);
712
}
713
bad_name = true;
714
break;
715
}
716
}
717
if(bad_name){
718
continue;
719
}
720
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
721
size_t suf_len = strlen(*suf);
722
if((d_name_len >= suf_len)
723
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
724
== 0)){
725
if(debug){
726
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
727
" with bad suffix %s\n", dirst->d_name, *suf);
728
}
729
bad_name = true;
730
break;
731
}
732
}
733
734
if(bad_name){
735
continue;
736
}
737
}
738
739
char *filename;
740
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
741
if(ret < 0){
742
perror("asprintf");
743
continue;
744
}
745
746
ret = stat(filename, &st);
747
if (ret == -1){
748
perror("stat");
749
free(filename);
750
continue;
751
}
752
959
for(int i = 0; i < numplugins; i++){
960
961
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
962
if(plugin_fd == -1){
963
error(0, errno, "Could not open plugin");
964
free(direntries[i]);
965
continue;
966
}
967
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
968
if(ret == -1){
969
error(0, errno, "stat");
970
close(plugin_fd);
971
free(direntries[i]);
972
continue;
973
}
974
753
975
/* Ignore non-executable files */
754
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
976
if(not S_ISREG(st.st_mode)
977
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
978
X_OK, 0)) != 0)){
755
979
if(debug){
756
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
757
" with bad type or mode\n", filename);
980
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
981
" with bad type or mode\n",
982
plugindir != NULL ? plugindir : PDIR,
983
direntries[i]->d_name);
758
984
}
759
free(filename);
985
close(plugin_fd);
986
free(direntries[i]);
760
987
continue;
761
988
}
762
989
763
plugin *p = getplugin(dirst->d_name);
990
plugin *p = getplugin(direntries[i]->d_name);
764
991
if(p == NULL){
765
perror("getplugin");
766
free(filename);
992
error(0, errno, "getplugin");
993
close(plugin_fd);
994
free(direntries[i]);
767
995
continue;
768
996
}
769
997
if(p->disabled){
770
998
if(debug){
771
999
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
772
dirst->d_name);
1000
direntries[i]->d_name);
773
1001
}
774
free(filename);
1002
close(plugin_fd);
1003
free(direntries[i]);
775
1004
continue;
776
1005
}
777
1006
{
780
1009
if(g != NULL){
781
1010
for(char **a = g->argv + 1; *a != NULL; a++){
782
1011
if(not add_argument(p, *a)){
783
perror("add_argument");
1012
error(0, errno, "add_argument");
784
1013
}
785
1014
}
786
1015
/* Add global environment variables */
787
1016
for(char **e = g->environ; *e != NULL; e++){
788
1017
if(not add_environment(p, *e, false)){
789
perror("add_environment");
1018
error(0, errno, "add_environment");
790
1019
}
791
1020
}
792
1021
}
793
1022
}
794
/* If this plugin has any environment variables, we will call
795
using execve and need to duplicate the environment from this
796
process, too. */
1023
/* If this plugin has any environment variables, we need to
1024
duplicate the environment from this process, too. */
797
1025
if(p->environ[0] != NULL){
798
1026
for(char **e = environ; *e != NULL; e++){
799
1027
if(not add_environment(p, *e, false)){
800
perror("add_environment");
1028
error(0, errno, "add_environment");
801
1029
}
802
1030
}
803
1031
}
804
1032
805
1033
int pipefd[2];
806
ret = pipe(pipefd);
807
if (ret == -1){
808
perror("pipe");
809
exitstatus = EXIT_FAILURE;
810
goto fallback;
811
}
1034
#ifndef O_CLOEXEC
1035
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1036
#else /* O_CLOEXEC */
1037
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
1038
#endif /* O_CLOEXEC */
1039
if(ret == -1){
1040
error(0, errno, "pipe");
1041
exitstatus = EX_OSERR;
1042
free(direntries[i]);
1043
goto fallback;
1044
}
1045
if(pipefd[0] >= FD_SETSIZE){
1046
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1047
FD_SETSIZE);
1048
close(pipefd[0]);
1049
close(pipefd[1]);
1050
exitstatus = EX_OSERR;
1051
free(direntries[i]);
1052
goto fallback;
1053
}
1054
#ifndef O_CLOEXEC
812
1055
/* Ask OS to automatic close the pipe on exec */
813
1056
ret = set_cloexec_flag(pipefd[0]);
814
1057
if(ret < 0){
815
perror("set_cloexec_flag");
816
exitstatus = EXIT_FAILURE;
1058
error(0, errno, "set_cloexec_flag");
1059
close(pipefd[0]);
1060
close(pipefd[1]);
1061
exitstatus = EX_OSERR;
1062
free(direntries[i]);
817
1063
goto fallback;
818
1064
}
819
1065
ret = set_cloexec_flag(pipefd[1]);
820
1066
if(ret < 0){
821
perror("set_cloexec_flag");
822
exitstatus = EXIT_FAILURE;
1067
error(0, errno, "set_cloexec_flag");
1068
close(pipefd[0]);
1069
close(pipefd[1]);
1070
exitstatus = EX_OSERR;
1071
free(direntries[i]);
823
1072
goto fallback;
824
1073
}
1074
#endif /* not O_CLOEXEC */
825
1075
/* Block SIGCHLD until process is safely in process list */
826
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1076
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1077
&sigchld_action.sa_mask,
1078
NULL));
827
1079
if(ret < 0){
828
perror("sigprocmask");
829
exitstatus = EXIT_FAILURE;
1080
error(0, errno, "sigprocmask");
1081
exitstatus = EX_OSERR;
1082
free(direntries[i]);
830
1083
goto fallback;
831
1084
}
832
1085
/* Starting a new process to be watched */
833
pid_t pid = fork();
1086
pid_t pid;
1087
do {
1088
pid = fork();
1089
} while(pid == -1 and errno == EINTR);
834
1090
if(pid == -1){
835
perror("fork");
836
exitstatus = EXIT_FAILURE;
1091
error(0, errno, "fork");
1092
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1093
&sigchld_action.sa_mask, NULL));
1094
close(pipefd[0]);
1095
close(pipefd[1]);
1096
exitstatus = EX_OSERR;
1097
free(direntries[i]);
837
1098
goto fallback;
838
1099
}
839
1100
if(pid == 0){
840
1101
/* this is the child process */
841
1102
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
842
1103
if(ret < 0){
843
perror("sigaction");
844
_exit(EXIT_FAILURE);
1104
error(0, errno, "sigaction");
1105
_exit(EX_OSERR);
845
1106
}
846
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1107
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
847
1108
if(ret < 0){
848
perror("sigprocmask");
849
_exit(EXIT_FAILURE);
1109
error(0, errno, "sigprocmask");
1110
_exit(EX_OSERR);
850
1111
}
851
1112
852
1113
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
853
1114
if(ret == -1){
854
perror("dup2");
855
_exit(EXIT_FAILURE);
1115
error(0, errno, "dup2");
1116
_exit(EX_OSERR);
856
1117
}
857
1118
858
if(dirfd(dir) < 0){
859
/* If dir has no file descriptor, we could not set FD_CLOEXEC
860
above and must now close it manually here. */
861
closedir(dir);
862
}
863
if(p->environ[0] == NULL){
864
if(execv(filename, p->argv) < 0){
865
perror("execv");
866
_exit(EXIT_FAILURE);
867
}
868
} else {
869
if(execve(filename, p->argv, p->environ) < 0){
870
perror("execve");
871
_exit(EXIT_FAILURE);
872
}
1119
if(fexecve(plugin_fd, p->argv,
1120
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1121
error(0, errno, "fexecve for %s/%s",
1122
plugindir != NULL ? plugindir : PDIR,
1123
direntries[i]->d_name);
1124
_exit(EX_OSERR);
873
1125
}
874
1126
/* no return */
875
1127
}
876
1128
/* Parent process */
877
1129
close(pipefd[1]); /* Close unused write end of pipe */
878
free(filename);
879
plugin *new_plugin = getplugin(dirst->d_name);
880
if (new_plugin == NULL){
881
perror("getplugin");
882
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1130
close(plugin_fd);
1131
plugin *new_plugin = getplugin(direntries[i]->d_name);
1132
if(new_plugin == NULL){
1133
error(0, errno, "getplugin");
1134
ret = (int)(TEMP_FAILURE_RETRY
1135
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1136
NULL)));
883
1137
if(ret < 0){
884
perror("sigprocmask");
1138
error(0, errno, "sigprocmask");
885
1139
}
886
exitstatus = EXIT_FAILURE;
1140
exitstatus = EX_OSERR;
1141
free(direntries[i]);
887
1142
goto fallback;
888
1143
}
1144
free(direntries[i]);
889
1145
890
1146
new_plugin->pid = pid;
891
1147
new_plugin->fd = pipefd[0];
892
1148
1149
if(debug){
1150
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1151
new_plugin->name, (intmax_t) (new_plugin->pid));
1152
}
1153
893
1154
/* Unblock SIGCHLD so signal handler can be run if this process
894
1155
has already completed */
895
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1156
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1157
&sigchld_action.sa_mask,
1158
NULL));
896
1159
if(ret < 0){
897
perror("sigprocmask");
898
exitstatus = EXIT_FAILURE;
1160
error(0, errno, "sigprocmask");
1161
exitstatus = EX_OSERR;
899
1162
goto fallback;
900
1163
}
901
1164
902
1165
FD_SET(new_plugin->fd, &rfds_all);
903
1166
904
if (maxfd < new_plugin->fd){
1167
if(maxfd < new_plugin->fd){
905
1168
maxfd = new_plugin->fd;
906
1169
}
907
908
1170
}
909
1171
910
closedir(dir);
911
dir = NULL;
912
1172
free(direntries);
1173
direntries = NULL;
1174
close(dir_fd);
1175
dir_fd = -1;
1176
free_plugin(getplugin(NULL));
1177
913
1178
for(plugin *p = plugin_list; p != NULL; p = p->next){
914
1179
if(p->pid != 0){
915
1180
break;
920
1185
free_plugin_list();
921
1186
}
922
1187
}
923
1188
924
1189
/* Main loop while running plugins exist */
925
1190
while(plugin_list){
926
1191
fd_set rfds = rfds_all;
927
1192
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
928
if (select_ret == -1){
929
perror("select");
930
exitstatus = EXIT_FAILURE;
1193
if(select_ret == -1 and errno != EINTR){
1194
error(0, errno, "select");
1195
exitstatus = EX_OSERR;
931
1196
goto fallback;
932
1197
}
933
1198
/* OK, now either a process completed, or something can be read
934
1199
from one of them */
935
1200
for(plugin *proc = plugin_list; proc != NULL;){
936
1201
/* Is this process completely done? */
937
if(proc->eof and proc->completed){
1202
if(proc->completed and proc->eof){
938
1203
/* Only accept the plugin output if it exited cleanly */
939
1204
if(not WIFEXITED(proc->status)
940
1205
or WEXITSTATUS(proc->status) != 0){
941
1206
/* Bad exit by plugin */
942
1207
943
1208
if(debug){
944
1209
if(WIFEXITED(proc->status)){
945
fprintf(stderr, "Plugin %u exited with status %d\n",
946
(unsigned int) (proc->pid),
1210
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1211
" status %d\n", proc->name,
1212
(intmax_t) (proc->pid),
947
1213
WEXITSTATUS(proc->status));
948
} else if(WIFSIGNALED(proc->status)) {
949
fprintf(stderr, "Plugin %u killed by signal %d\n",
950
(unsigned int) (proc->pid),
951
WTERMSIG(proc->status));
952
} else if(WCOREDUMP(proc->status)){
953
fprintf(stderr, "Plugin %d dumped core\n",
954
(unsigned int) (proc->pid));
1214
} else if(WIFSIGNALED(proc->status)){
1215
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1216
" signal %d: %s\n", proc->name,
1217
(intmax_t) (proc->pid),
1218
WTERMSIG(proc->status),
1219
strsignal(WTERMSIG(proc->status)));
955
1220
}
956
1221
}
957
1222
958
1223
/* Remove the plugin */
959
1224
FD_CLR(proc->fd, &rfds_all);
960
1225
961
1226
/* Block signal while modifying process_list */
962
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
963
if(ret < 0){
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
966
goto fallback;
967
}
968
969
/* We are done modifying process list, so unblock signal */
970
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
971
NULL);
972
if(ret < 0){
973
perror("sigprocmask");
974
exitstatus = EXIT_FAILURE;
975
goto fallback;
976
}
977
978
if(plugin_list == NULL){
979
break;
1227
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1228
(SIG_BLOCK,
1229
&sigchld_action.sa_mask,
1230
NULL));
1231
if(ret < 0){
1232
error(0, errno, "sigprocmask");
1233
exitstatus = EX_OSERR;
1234
goto fallback;
980
1235
}
981
1236
982
1237
plugin *next_plugin = proc->next;
983
1238
free_plugin(proc);
984
1239
proc = next_plugin;
1240
1241
/* We are done modifying process list, so unblock signal */
1242
ret = (int)(TEMP_FAILURE_RETRY
1243
(sigprocmask(SIG_UNBLOCK,
1244
&sigchld_action.sa_mask, NULL)));
1245
if(ret < 0){
1246
error(0, errno, "sigprocmask");
1247
exitstatus = EX_OSERR;
1248
goto fallback;
1249
}
1250
1251
if(plugin_list == NULL){
1252
break;
1253
}
1254
985
1255
continue;
986
1256
}
987
1257
988
1258
/* This process exited nicely, so print its buffer */
989
1259
990
1260
bool bret = print_out_password(proc->buffer,
991
1261
proc->buffer_length);
992
1262
if(not bret){
993
perror("print_out_password");
994
exitstatus = EXIT_FAILURE;
1263
error(0, errno, "print_out_password");
1264
exitstatus = EX_IOERR;
995
1265
}
996
1266
goto fallback;
997
1267
}
1004
1274
}
1005
1275
/* Before reading, make the process' data buffer large enough */
1006
1276
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1007
proc->buffer = realloc(proc->buffer, proc->buffer_size
1008
+ (size_t) BUFFER_SIZE);
1009
if (proc->buffer == NULL){
1010
perror("malloc");
1011
exitstatus = EXIT_FAILURE;
1277
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1278
+ (size_t) BUFFER_SIZE);
1279
if(new_buffer == NULL){
1280
error(0, errno, "malloc");
1281
exitstatus = EX_OSERR;
1012
1282
goto fallback;
1013
1283
}
1284
proc->buffer = new_buffer;
1014
1285
proc->buffer_size += BUFFER_SIZE;
1015
1286
}
1016
1287
/* Read from the process */
1017
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1018
BUFFER_SIZE);
1019
if(ret < 0){
1288
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1289
proc->buffer
1290
+ proc->buffer_length,
1291
BUFFER_SIZE));
1292
if(sret < 0){
1020
1293
/* Read error from this process; ignore the error */
1021
1294
proc = proc->next;
1022
1295
continue;
1023
1296
}
1024
if(ret == 0){
1297
if(sret == 0){
1025
1298
/* got EOF */
1026
1299
proc->eof = true;
1027
1300
} else {
1028
proc->buffer_length += (size_t) ret;
1301
proc->buffer_length += (size_t) sret;
1029
1302
}
1030
1303
}
1031
1304
}
1032
1033
1305
1306
1034
1307
fallback:
1035
1308
1036
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1309
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1310
and exitstatus != EX_OK)){
1037
1311
/* Fallback if all plugins failed, none are found or an error
1038
1312
occured */
1039
1313
bool bret;
1040
1314
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1041
1315
char *passwordbuffer = getpass("Password: ");
1042
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1316
size_t len = strlen(passwordbuffer);
1317
/* Strip trailing newline */
1318
if(len > 0 and passwordbuffer[len-1] == '\n'){
1319
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1320
len--;
1321
}
1322
bret = print_out_password(passwordbuffer, len);
1043
1323
if(not bret){
1044
perror("print_out_password");
1045
exitstatus = EXIT_FAILURE;
1324
error(0, errno, "print_out_password");
1325
exitstatus = EX_IOERR;
1046
1326
}
1047
1327
}
1048
1328
1049
1329
/* Restore old signal handler */
1050
1330
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1051
1331
if(ret == -1){
1052
perror("sigaction");
1053
exitstatus = EXIT_FAILURE;
1332
error(0, errno, "sigaction");
1333
exitstatus = EX_OSERR;
1054
1334
}
1055
1335
1056
1336
if(custom_argv != NULL){
1057
1337
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1058
1338
free(*arg);
1060
1340
free(custom_argv);
1061
1341
}
1062
1342
1063
if(dir != NULL){
1064
closedir(dir);
1343
free(direntries);
1344
1345
if(dir_fd != -1){
1346
close(dir_fd);
1065
1347
}
1066
1348
1067
/* Free the process list and kill the processes */
1349
/* Kill the processes */
1068
1350
for(plugin *p = plugin_list; p != NULL; p = p->next){
1069
1351
if(p->pid != 0){
1070
1352
close(p->fd);
1071
1353
ret = kill(p->pid, SIGTERM);
1072
1354
if(ret == -1 and errno != ESRCH){
1073
1355
/* Set-uid proccesses might not get closed */
1074
perror("kill");
1356
error(0, errno, "kill");
1075
1357
}
1076
1358
}
1077
1359
}
1078
1360
1079
1361
/* Wait for any remaining child processes to terminate */
1080
do{
1362
do {
1081
1363
ret = wait(NULL);
1082
1364
} while(ret >= 0);
1083
1365
if(errno != ECHILD){
1084
perror("wait");
1366
error(0, errno, "wait");
1085
1367
}
1086
1368
1087
1369
free_plugin_list();
1088
1370
1089
1371
free(plugindir);
1372
free(pluginhelperdir);
1090
1373
free(argfile);
1091
1374
1092
1375
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0