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- Committer: Teddy Hogeborn
- Date: 2017-08-20 16:20:54 UTC
- Revision ID: teddy@recompile.se-20170820162054-jwig602syxx2k4l0
Alter copyright notices slightly. Actual license is unchanged!
This alters all copyright notices to use the Free Software
Foundation's recommendations for license notices; from
<https://www.gnu.org/licenses/gpl-howto.html>:
For programs that are more than one file, it is better to replace
“this program” with the name of the program, and begin the statement
with a line saying “This file is part of NAME”.
* DBUS-API: Use program name "Mandos" explicitly in license notice.
* debian/copyright: - '' -
* initramfs-unpack: - '' -
* legalnotice.xml: - '' -
* mandos: - '' -
* mandos-ctl: - '' -
* mandos-keygen: - '' -
* mandos-monitor: - '' -
* plugin-helpers/mandos-client-iprouteadddel.c: - '' -
* plugin-runner.c: - '' -
* plugins.d/askpass-fifo.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/plymouth.c: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/usplash.c: - '' -
This alters all copyright notices to use the Free Software
Foundation's recommendations for license notices; from
<https://www.gnu.org/licenses/gpl-howto.html>:
For programs that are more than one file, it is better to replace
“this program” with the name of the program, and begin the statement
with a line saying “This file is part of NAME”.
* DBUS-API: Use program name "Mandos" explicitly in license notice.
* debian/copyright: - '' -
* initramfs-unpack: - '' -
* legalnotice.xml: - '' -
* mandos: - '' -
* mandos-ctl: - '' -
* mandos-keygen: - '' -
* mandos-monitor: - '' -
* plugin-helpers/mandos-client-iprouteadddel.c: - '' -
* plugin-runner.c: - '' -
* plugins.d/askpass-fifo.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/plymouth.c: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/usplash.c: - '' -
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- 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 © 2008-2017 Teddy Hogeborn
6
* Copyright © 2008-2017 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
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
275
322
}
276
323
free(plugin_node->environ);
277
324
free(plugin_node->buffer);
278
325
279
326
/* Removes the plugin from the singly-linked list */
280
327
if(plugin_node == plugin_list){
281
328
/* First one - simple */
301
348
302
349
int main(int argc, char *argv[]){
303
350
char *plugindir = NULL;
351
char *pluginhelperdir = NULL;
304
352
char *argfile = NULL;
305
353
FILE *conffp;
306
size_t d_name_len;
307
DIR *dir = NULL;
308
struct dirent *dirst;
354
struct dirent **direntries = NULL;
309
355
struct stat st;
310
356
fd_set rfds_all;
311
357
int ret, maxfd = 0;
319
365
.sa_flags = SA_NOCLDSTOP };
320
366
char **custom_argv = NULL;
321
367
int custom_argc = 0;
368
int dir_fd = -1;
322
369
323
370
/* Establish a signal handler */
324
371
sigemptyset(&sigchld_action.sa_mask);
325
372
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
326
373
if(ret == -1){
327
perror("sigaddset");
328
exitstatus = EXIT_FAILURE;
374
error(0, errno, "sigaddset");
375
exitstatus = EX_OSERR;
329
376
goto fallback;
330
377
}
331
378
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
332
379
if(ret == -1){
333
perror("sigaction");
334
exitstatus = EXIT_FAILURE;
380
error(0, errno, "sigaction");
381
exitstatus = EX_OSERR;
335
382
goto fallback;
336
383
}
337
384
369
416
.doc = "Group ID the plugins will run as", .group = 3 },
370
417
{ .name = "debug", .key = 132,
371
418
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
420
.arg = "DIRECTORY",
421
.doc = "Specify a different plugin helper directory",
422
.group = 2 },
423
/*
424
* These reproduce what we would get without ARGP_NO_HELP
425
*/
426
{ .name = "help", .key = '?',
427
.doc = "Give this help list", .group = -1 },
428
{ .name = "usage", .key = -3,
429
.doc = "Give a short usage message", .group = -1 },
430
{ .name = "version", .key = 'V',
431
.doc = "Print program version", .group = -1 },
372
432
{ .name = NULL }
373
433
};
374
434
375
error_t parse_opt (int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
377
switch (key) {
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
437
errno = 0;
438
switch(key){
439
char *tmp;
440
intmax_t tmp_id;
378
441
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;
442
{
443
char *plugin_option;
444
while((plugin_option = strsep(&arg, ",")) != NULL){
445
if(not add_argument(getplugin(NULL), plugin_option)){
446
break;
388
447
}
389
448
}
449
errno = 0;
390
450
}
391
451
break;
392
452
case 'G': /* --global-env */
393
if(arg == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
453
if(add_environment(getplugin(NULL), arg, true)){
454
errno = 0;
398
455
}
399
456
break;
400
457
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
}
458
{
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*option_list = '\0';
466
option_list++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
char *option;
473
while((option = strsep(&option_list, ",")) != NULL){
474
if(not add_argument(getplugin(arg), option)){
475
break;
476
}
477
}
478
errno = 0;
420
479
}
421
480
break;
422
481
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
426
482
{
427
483
char *envdef = strchr(arg, ':');
428
484
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
486
errno = EINVAL;
429
487
break;
430
488
}
431
489
*envdef = '\0';
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
490
envdef++;
491
if(arg[0] == '\0'){
492
argp_error(state, "Empty plugin name");
493
errno = EINVAL;
494
break;
495
}
496
if(add_environment(getplugin(arg), envdef, true)){
497
errno = 0;
434
498
}
435
499
}
436
500
break;
437
501
case 'd': /* --disable */
438
if (arg != NULL){
502
{
439
503
plugin *p = getplugin(arg);
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
504
if(p != NULL){
505
p->disabled = true;
506
errno = 0;
442
507
}
443
p->disabled = true;
444
508
}
445
509
break;
446
510
case 'e': /* --enable */
447
if (arg != NULL){
511
{
448
512
plugin *p = getplugin(arg);
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
513
if(p != NULL){
514
p->disabled = false;
515
errno = 0;
451
516
}
452
p->disabled = false;
453
517
}
454
518
break;
455
519
case 128: /* --plugin-dir */
456
520
free(plugindir);
457
521
plugindir = strdup(arg);
458
if(plugindir == NULL){
459
perror("strdup");
460
}
522
if(plugindir != NULL){
523
errno = 0;
524
}
461
525
break;
462
526
case 129: /* --config-file */
463
527
/* This is already done by parse_opt_config_file() */
464
528
break;
465
529
case 130: /* --userid */
466
/* In the GNU C library, uid_t is always unsigned int */
467
ret = sscanf(arg, "%u", &uid);
468
if(ret != 1){
469
fprintf(stderr, "Bad user ID number: \"%s\", using %u\n", arg,
470
uid);
530
tmp_id = strtoimax(arg, &tmp, 10);
531
if(errno != 0 or tmp == arg or *tmp != '\0'
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
535
break;
471
536
}
537
uid = (uid_t)tmp_id;
538
errno = 0;
472
539
break;
473
540
case 131: /* --groupid */
474
/* In the GNU C library, gid_t is always unsigned int */
475
ret = sscanf(arg, "%u", &gid);
476
if(ret != 1){
477
fprintf(stderr, "Bad group ID number: \"%s\", using %u\n",
478
arg, gid);
541
tmp_id = strtoimax(arg, &tmp, 10);
542
if(errno != 0 or tmp == arg or *tmp != '\0'
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
546
break;
479
547
}
548
gid = (gid_t)tmp_id;
549
errno = 0;
480
550
break;
481
551
case 132: /* --debug */
482
552
debug = true;
483
553
break;
554
case 133: /* --plugin-helper-dir */
555
free(pluginhelperdir);
556
pluginhelperdir = strdup(arg);
557
if(pluginhelperdir != NULL){
558
errno = 0;
559
}
560
break;
561
/*
562
* These reproduce what we would get without ARGP_NO_HELP
563
*/
564
case '?': /* --help */
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
case -3: /* --usage */
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
569
argp_state_help(state, state->out_stream,
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
571
case 'V': /* --version */
572
fprintf(state->out_stream, "%s\n", argp_program_version);
573
exit(EXIT_SUCCESS);
574
break;
484
575
/*
485
576
* When adding more options before this line, remember to also add a
486
577
* "case" to the "parse_opt_config_file" function below.
489
580
/* Cryptsetup always passes an argument, which is an empty
490
581
string if "none" was specified in /etc/crypttab. So if
491
582
argument was empty, we ignore it silently. */
492
if(arg[0] != '\0'){
493
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
583
if(arg[0] == '\0'){
584
break;
494
585
}
495
break;
496
case ARGP_KEY_END:
497
break;
498
586
default:
499
587
return ARGP_ERR_UNKNOWN;
500
588
}
501
return 0;
589
return errno; /* Set to 0 at start */
502
590
}
503
591
504
592
/* This option parser is the same as parse_opt() above, except it
505
593
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) {
594
error_t parse_opt_config_file(int key, char *arg,
595
__attribute__((unused))
596
struct argp_state *state){
597
errno = 0;
598
switch(key){
510
599
case 'g': /* --global-options */
511
600
case 'G': /* --global-env */
512
601
case 'o': /* --options-for */
518
607
case 129: /* --config-file */
519
608
free(argfile);
520
609
argfile = strdup(arg);
521
if(argfile == NULL){
522
perror("strdup");
610
if(argfile != NULL){
611
errno = 0;
523
612
}
524
break;
613
break;
525
614
case 130: /* --userid */
526
615
case 131: /* --groupid */
527
616
case 132: /* --debug */
617
case 133: /* --plugin-helper-dir */
618
case '?': /* --help */
619
case -3: /* --usage */
620
case 'V': /* --version */
528
621
case ARGP_KEY_ARG:
529
case ARGP_KEY_END:
530
622
break;
531
623
default:
532
624
return ARGP_ERR_UNKNOWN;
533
625
}
534
return 0;
626
return errno;
535
627
}
536
628
537
629
struct argp argp = { .options = options,
541
633
542
634
/* Parse using parse_opt_config_file() in order to get the custom
543
635
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;
636
ret = argp_parse(&argp, argc, argv,
637
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
638
NULL, NULL);
639
switch(ret){
640
case 0:
641
break;
642
case ENOMEM:
643
default:
644
errno = ret;
645
error(0, errno, "argp_parse");
646
exitstatus = EX_OSERR;
647
goto fallback;
648
case EINVAL:
649
exitstatus = EX_USAGE;
548
650
goto fallback;
549
651
}
550
652
552
654
argp.parser = parse_opt;
553
655
554
656
/* Open the configfile if available */
555
if (argfile == NULL){
657
if(argfile == NULL){
556
658
conffp = fopen(AFILE, "r");
557
659
} else {
558
660
conffp = fopen(argfile, "r");
559
}
661
}
560
662
if(conffp != NULL){
561
663
char *org_line = NULL;
562
664
char *p, *arg, *new_arg, *line;
563
665
size_t size = 0;
564
666
const char whitespace_delims[] = " \r\t\f\v\n";
565
667
const char comment_delim[] = "#";
566
668
567
669
custom_argc = 1;
568
670
custom_argv = malloc(sizeof(char*) * 2);
569
671
if(custom_argv == NULL){
570
perror("malloc");
571
exitstatus = EXIT_FAILURE;
672
error(0, errno, "malloc");
673
exitstatus = EX_OSERR;
572
674
goto fallback;
573
675
}
574
676
custom_argv[0] = argv[0];
575
677
custom_argv[1] = NULL;
576
678
577
679
/* for each line in the config file, strip whitespace and ignore
578
680
commented text */
579
681
while(true){
581
683
if(sret == -1){
582
684
break;
583
685
}
584
686
585
687
line = org_line;
586
688
arg = strsep(&line, comment_delim);
587
689
while((p = strsep(&arg, whitespace_delims)) != NULL){
590
692
}
591
693
new_arg = strdup(p);
592
694
if(new_arg == NULL){
593
perror("strdup");
594
exitstatus = EXIT_FAILURE;
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
595
697
free(org_line);
596
698
goto fallback;
597
699
}
598
700
599
701
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;
702
{
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((size_t)custom_argc + 1));
705
if(new_argv == NULL){
706
error(0, errno, "realloc");
707
exitstatus = EX_OSERR;
708
free(new_arg);
709
free(org_line);
710
goto fallback;
711
} else {
712
custom_argv = new_argv;
713
}
607
714
}
608
715
custom_argv[custom_argc-1] = new_arg;
609
custom_argv[custom_argc] = NULL;
716
custom_argv[custom_argc] = NULL;
610
717
}
611
718
}
719
do {
720
ret = fclose(conffp);
721
} while(ret == EOF and errno == EINTR);
722
if(ret == EOF){
723
error(0, errno, "fclose");
724
exitstatus = EX_IOERR;
725
goto fallback;
726
}
612
727
free(org_line);
613
728
} else {
614
729
/* Check for harmful errors and go to fallback. Other errors might
615
730
not affect opening plugins */
616
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
617
perror("fopen");
618
exitstatus = EXIT_FAILURE;
731
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
732
error(0, errno, "fopen");
733
exitstatus = EX_OSERR;
619
734
goto fallback;
620
735
}
621
736
}
622
/* If there was any arguments from configuration file,
623
pass them to parser as command arguments */
737
/* If there were any arguments from the configuration file, pass
738
them to parser as command line arguments */
624
739
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;
740
ret = argp_parse(&argp, custom_argc, custom_argv,
741
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
742
NULL, NULL);
743
switch(ret){
744
case 0:
745
break;
746
case ENOMEM:
747
default:
748
errno = ret;
749
error(0, errno, "argp_parse");
750
exitstatus = EX_OSERR;
751
goto fallback;
752
case EINVAL:
753
exitstatus = EX_CONFIG;
630
754
goto fallback;
631
755
}
632
756
}
633
757
634
758
/* Parse actual command line arguments, to let them override the
635
759
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;
760
ret = argp_parse(&argp, argc, argv,
761
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
762
NULL, NULL);
763
switch(ret){
764
case 0:
765
break;
766
case ENOMEM:
767
default:
768
errno = ret;
769
error(0, errno, "argp_parse");
770
exitstatus = EX_OSERR;
771
goto fallback;
772
case EINVAL:
773
exitstatus = EX_USAGE;
774
goto fallback;
775
}
776
777
{
778
char *pluginhelperenv;
779
bool bret = true;
780
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
781
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
782
if(ret != -1){
783
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
784
}
785
if(ret == -1 or not bret){
786
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
787
" environment variable to \"%s\" for all plugins\n",
788
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
789
}
790
if(ret != -1){
791
free(pluginhelperenv);
792
}
641
793
}
642
794
643
795
if(debug){
644
for(plugin *p = plugin_list; p != NULL; p=p->next){
796
for(plugin *p = plugin_list; p != NULL; p = p->next){
645
797
fprintf(stderr, "Plugin: %s has %d arguments\n",
646
798
p->name ? p->name : "Global", p->argc - 1);
647
799
for(char **a = p->argv; *a != NULL; a++){
648
800
fprintf(stderr, "\tArg: %s\n", *a);
649
801
}
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
802
fprintf(stderr, "...and %d environment variables\n", p->envc);
651
803
for(char **a = p->environ; *a != NULL; a++){
652
804
fprintf(stderr, "\t%s\n", *a);
653
805
}
654
806
}
655
807
}
656
808
657
/* Strip permissions down to nobody */
809
if(getuid() == 0){
810
/* Work around Debian bug #633582:
811
<https://bugs.debian.org/633582> */
812
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
813
if(plugindir_fd == -1){
814
if(errno != ENOENT){
815
error(0, errno, "open(\"" PDIR "\")");
816
}
817
} else {
818
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
819
if(ret == -1){
820
error(0, errno, "fstat");
821
} else {
822
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
823
ret = fchown(plugindir_fd, uid, gid);
824
if(ret == -1){
825
error(0, errno, "fchown");
826
}
827
}
828
}
829
close(plugindir_fd);
830
}
831
}
832
833
/* Lower permissions */
834
ret = setgid(gid);
835
if(ret == -1){
836
error(0, errno, "setgid");
837
}
658
838
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 */
839
if(ret == -1){
840
error(0, errno, "setuid");
841
}
842
843
/* Open plugin directory with close_on_exec flag */
680
844
{
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;
845
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
846
#ifdef O_CLOEXEC
847
O_CLOEXEC
848
#else /* not O_CLOEXEC */
849
0
850
#endif /* not O_CLOEXEC */
851
);
852
if(dir_fd == -1){
853
error(0, errno, "Could not open plugin dir");
854
exitstatus = EX_UNAVAILABLE;
855
goto fallback;
856
}
857
858
#ifndef O_CLOEXEC
859
/* Set the FD_CLOEXEC flag on the directory */
860
ret = set_cloexec_flag(dir_fd);
861
if(ret < 0){
862
error(0, errno, "set_cloexec_flag");
863
exitstatus = EX_OSERR;
864
goto fallback;
865
}
866
#endif /* O_CLOEXEC */
867
}
868
869
int good_name(const struct dirent * const dirent){
870
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
871
"*.dpkg-old", "*.dpkg-bak",
872
"*.dpkg-divert", NULL };
873
#ifdef __GNUC__
874
#pragma GCC diagnostic push
875
#pragma GCC diagnostic ignored "-Wcast-qual"
876
#endif
877
for(const char **pat = (const char **)patterns;
878
*pat != NULL; pat++){
879
#ifdef __GNUC__
880
#pragma GCC diagnostic pop
881
#endif
882
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
883
!= FNM_NOMATCH){
884
if(debug){
885
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
886
" matching pattern %s\n", dirent->d_name, *pat);
887
}
888
return 0;
688
889
}
689
890
}
891
return 1;
892
}
893
894
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
895
alphasort);
896
if(numplugins == -1){
897
error(0, errno, "Could not scan plugin dir");
898
direntries = NULL;
899
exitstatus = EX_OSERR;
900
goto fallback;
690
901
}
691
902
692
903
FD_ZERO(&rfds_all);
693
904
694
905
/* 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
906
for(int i = 0; i < numplugins; i++){
907
908
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
909
if(plugin_fd == -1){
910
error(0, errno, "Could not open plugin");
911
free(direntries[i]);
912
continue;
913
}
914
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
915
if(ret == -1){
916
error(0, errno, "stat");
917
close(plugin_fd);
918
free(direntries[i]);
919
continue;
920
}
921
772
922
/* Ignore non-executable files */
773
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
923
if(not S_ISREG(st.st_mode)
924
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
925
X_OK, 0)) != 0)){
774
926
if(debug){
775
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
776
" with bad type or mode\n", filename);
927
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
928
" with bad type or mode\n",
929
plugindir != NULL ? plugindir : PDIR,
930
direntries[i]->d_name);
777
931
}
778
free(filename);
932
close(plugin_fd);
933
free(direntries[i]);
779
934
continue;
780
935
}
781
936
782
plugin *p = getplugin(dirst->d_name);
937
plugin *p = getplugin(direntries[i]->d_name);
783
938
if(p == NULL){
784
perror("getplugin");
785
free(filename);
939
error(0, errno, "getplugin");
940
close(plugin_fd);
941
free(direntries[i]);
786
942
continue;
787
943
}
788
944
if(p->disabled){
789
945
if(debug){
790
946
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
791
dirst->d_name);
947
direntries[i]->d_name);
792
948
}
793
free(filename);
949
close(plugin_fd);
950
free(direntries[i]);
794
951
continue;
795
952
}
796
953
{
799
956
if(g != NULL){
800
957
for(char **a = g->argv + 1; *a != NULL; a++){
801
958
if(not add_argument(p, *a)){
802
perror("add_argument");
959
error(0, errno, "add_argument");
803
960
}
804
961
}
805
962
/* Add global environment variables */
806
963
for(char **e = g->environ; *e != NULL; e++){
807
964
if(not add_environment(p, *e, false)){
808
perror("add_environment");
965
error(0, errno, "add_environment");
809
966
}
810
967
}
811
968
}
812
969
}
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. */
970
/* If this plugin has any environment variables, we need to
971
duplicate the environment from this process, too. */
816
972
if(p->environ[0] != NULL){
817
973
for(char **e = environ; *e != NULL; e++){
818
974
if(not add_environment(p, *e, false)){
819
perror("add_environment");
975
error(0, errno, "add_environment");
820
976
}
821
977
}
822
978
}
823
979
824
980
int pipefd[2];
825
ret = pipe(pipefd);
826
if (ret == -1){
827
perror("pipe");
828
exitstatus = EXIT_FAILURE;
829
goto fallback;
830
}
981
#ifndef O_CLOEXEC
982
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
983
#else /* O_CLOEXEC */
984
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
985
#endif /* O_CLOEXEC */
986
if(ret == -1){
987
error(0, errno, "pipe");
988
exitstatus = EX_OSERR;
989
free(direntries[i]);
990
goto fallback;
991
}
992
if(pipefd[0] >= FD_SETSIZE){
993
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
994
FD_SETSIZE);
995
close(pipefd[0]);
996
close(pipefd[1]);
997
exitstatus = EX_OSERR;
998
free(direntries[i]);
999
goto fallback;
1000
}
1001
#ifndef O_CLOEXEC
831
1002
/* Ask OS to automatic close the pipe on exec */
832
1003
ret = set_cloexec_flag(pipefd[0]);
833
1004
if(ret < 0){
834
perror("set_cloexec_flag");
835
exitstatus = EXIT_FAILURE;
1005
error(0, errno, "set_cloexec_flag");
1006
close(pipefd[0]);
1007
close(pipefd[1]);
1008
exitstatus = EX_OSERR;
1009
free(direntries[i]);
836
1010
goto fallback;
837
1011
}
838
1012
ret = set_cloexec_flag(pipefd[1]);
839
1013
if(ret < 0){
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1014
error(0, errno, "set_cloexec_flag");
1015
close(pipefd[0]);
1016
close(pipefd[1]);
1017
exitstatus = EX_OSERR;
1018
free(direntries[i]);
842
1019
goto fallback;
843
1020
}
1021
#endif /* not O_CLOEXEC */
844
1022
/* Block SIGCHLD until process is safely in process list */
845
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1023
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1024
&sigchld_action.sa_mask,
1025
NULL));
846
1026
if(ret < 0){
847
perror("sigprocmask");
848
exitstatus = EXIT_FAILURE;
1027
error(0, errno, "sigprocmask");
1028
exitstatus = EX_OSERR;
1029
free(direntries[i]);
849
1030
goto fallback;
850
1031
}
851
1032
/* Starting a new process to be watched */
852
pid_t pid = fork();
1033
pid_t pid;
1034
do {
1035
pid = fork();
1036
} while(pid == -1 and errno == EINTR);
853
1037
if(pid == -1){
854
perror("fork");
855
exitstatus = EXIT_FAILURE;
1038
error(0, errno, "fork");
1039
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1040
&sigchld_action.sa_mask, NULL));
1041
close(pipefd[0]);
1042
close(pipefd[1]);
1043
exitstatus = EX_OSERR;
1044
free(direntries[i]);
856
1045
goto fallback;
857
1046
}
858
1047
if(pid == 0){
859
1048
/* this is the child process */
860
1049
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
861
1050
if(ret < 0){
862
perror("sigaction");
863
_exit(EXIT_FAILURE);
1051
error(0, errno, "sigaction");
1052
_exit(EX_OSERR);
864
1053
}
865
1054
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
866
1055
if(ret < 0){
867
perror("sigprocmask");
868
_exit(EXIT_FAILURE);
1056
error(0, errno, "sigprocmask");
1057
_exit(EX_OSERR);
869
1058
}
870
1059
871
1060
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
872
1061
if(ret == -1){
873
perror("dup2");
874
_exit(EXIT_FAILURE);
1062
error(0, errno, "dup2");
1063
_exit(EX_OSERR);
875
1064
}
876
1065
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
}
1066
if(fexecve(plugin_fd, p->argv,
1067
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1068
error(0, errno, "fexecve for %s/%s",
1069
plugindir != NULL ? plugindir : PDIR,
1070
direntries[i]->d_name);
1071
_exit(EX_OSERR);
892
1072
}
893
1073
/* no return */
894
1074
}
895
1075
/* Parent process */
896
1076
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);
1077
close(plugin_fd);
1078
plugin *new_plugin = getplugin(direntries[i]->d_name);
1079
if(new_plugin == NULL){
1080
error(0, errno, "getplugin");
1081
ret = (int)(TEMP_FAILURE_RETRY
1082
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1083
NULL)));
902
1084
if(ret < 0){
903
perror("sigprocmask");
1085
error(0, errno, "sigprocmask");
904
1086
}
905
exitstatus = EXIT_FAILURE;
1087
exitstatus = EX_OSERR;
1088
free(direntries[i]);
906
1089
goto fallback;
907
1090
}
1091
free(direntries[i]);
908
1092
909
1093
new_plugin->pid = pid;
910
1094
new_plugin->fd = pipefd[0];
911
1095
912
1096
/* Unblock SIGCHLD so signal handler can be run if this process
913
1097
has already completed */
914
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1098
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1099
&sigchld_action.sa_mask,
1100
NULL));
915
1101
if(ret < 0){
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1102
error(0, errno, "sigprocmask");
1103
exitstatus = EX_OSERR;
918
1104
goto fallback;
919
1105
}
920
1106
921
1107
FD_SET(new_plugin->fd, &rfds_all);
922
1108
923
if (maxfd < new_plugin->fd){
1109
if(maxfd < new_plugin->fd){
924
1110
maxfd = new_plugin->fd;
925
1111
}
926
1112
}
927
1113
928
closedir(dir);
929
dir = NULL;
1114
free(direntries);
1115
direntries = NULL;
1116
close(dir_fd);
1117
dir_fd = -1;
1118
free_plugin(getplugin(NULL));
930
1119
931
1120
for(plugin *p = plugin_list; p != NULL; p = p->next){
932
1121
if(p->pid != 0){
943
1132
while(plugin_list){
944
1133
fd_set rfds = rfds_all;
945
1134
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
946
if (select_ret == -1){
947
perror("select");
948
exitstatus = EXIT_FAILURE;
1135
if(select_ret == -1 and errno != EINTR){
1136
error(0, errno, "select");
1137
exitstatus = EX_OSERR;
949
1138
goto fallback;
950
1139
}
951
1140
/* OK, now either a process completed, or something can be read
952
1141
from one of them */
953
1142
for(plugin *proc = plugin_list; proc != NULL;){
954
1143
/* Is this process completely done? */
955
if(proc->eof and proc->completed){
1144
if(proc->completed and proc->eof){
956
1145
/* Only accept the plugin output if it exited cleanly */
957
1146
if(not WIFEXITED(proc->status)
958
1147
or WEXITSTATUS(proc->status) != 0){
959
1148
/* Bad exit by plugin */
960
1149
961
1150
if(debug){
962
1151
if(WIFEXITED(proc->status)){
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
1152
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1153
" status %d\n", proc->name,
1154
(intmax_t) (proc->pid),
965
1155
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 %u dumped core\n",
972
(unsigned int) (proc->pid));
1156
} else if(WIFSIGNALED(proc->status)){
1157
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1158
" signal %d: %s\n", proc->name,
1159
(intmax_t) (proc->pid),
1160
WTERMSIG(proc->status),
1161
strsignal(WTERMSIG(proc->status)));
973
1162
}
974
1163
}
975
1164
976
1165
/* Remove the plugin */
977
1166
FD_CLR(proc->fd, &rfds_all);
978
1167
979
1168
/* Block signal while modifying process_list */
980
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1169
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1170
(SIG_BLOCK,
1171
&sigchld_action.sa_mask,
1172
NULL));
981
1173
if(ret < 0){
982
perror("sigprocmask");
983
exitstatus = EXIT_FAILURE;
1174
error(0, errno, "sigprocmask");
1175
exitstatus = EX_OSERR;
984
1176
goto fallback;
985
1177
}
986
1178
989
1181
proc = next_plugin;
990
1182
991
1183
/* We are done modifying process list, so unblock signal */
992
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
993
NULL);
1184
ret = (int)(TEMP_FAILURE_RETRY
1185
(sigprocmask(SIG_UNBLOCK,
1186
&sigchld_action.sa_mask, NULL)));
994
1187
if(ret < 0){
995
perror("sigprocmask");
996
exitstatus = EXIT_FAILURE;
1188
error(0, errno, "sigprocmask");
1189
exitstatus = EX_OSERR;
997
1190
goto fallback;
998
1191
}
999
1192
1009
1202
bool bret = print_out_password(proc->buffer,
1010
1203
proc->buffer_length);
1011
1204
if(not bret){
1012
perror("print_out_password");
1013
exitstatus = EXIT_FAILURE;
1205
error(0, errno, "print_out_password");
1206
exitstatus = EX_IOERR;
1014
1207
}
1015
1208
goto fallback;
1016
1209
}
1023
1216
}
1024
1217
/* Before reading, make the process' data buffer large enough */
1025
1218
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;
1219
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1220
+ (size_t) BUFFER_SIZE);
1221
if(new_buffer == NULL){
1222
error(0, errno, "malloc");
1223
exitstatus = EX_OSERR;
1031
1224
goto fallback;
1032
1225
}
1226
proc->buffer = new_buffer;
1033
1227
proc->buffer_size += BUFFER_SIZE;
1034
1228
}
1035
1229
/* Read from the process */
1036
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1037
BUFFER_SIZE);
1230
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1231
proc->buffer
1232
+ proc->buffer_length,
1233
BUFFER_SIZE));
1038
1234
if(sret < 0){
1039
1235
/* Read error from this process; ignore the error */
1040
1236
proc = proc->next;
1048
1244
}
1049
1245
}
1050
1246
}
1051
1052
1247
1248
1053
1249
fallback:
1054
1250
1055
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1251
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1252
and exitstatus != EX_OK)){
1056
1253
/* Fallback if all plugins failed, none are found or an error
1057
1254
occured */
1058
1255
bool bret;
1066
1263
}
1067
1264
bret = print_out_password(passwordbuffer, len);
1068
1265
if(not bret){
1069
perror("print_out_password");
1070
exitstatus = EXIT_FAILURE;
1266
error(0, errno, "print_out_password");
1267
exitstatus = EX_IOERR;
1071
1268
}
1072
1269
}
1073
1270
1074
1271
/* Restore old signal handler */
1075
1272
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1076
1273
if(ret == -1){
1077
perror("sigaction");
1078
exitstatus = EXIT_FAILURE;
1274
error(0, errno, "sigaction");
1275
exitstatus = EX_OSERR;
1079
1276
}
1080
1277
1081
1278
if(custom_argv != NULL){
1085
1282
free(custom_argv);
1086
1283
}
1087
1284
1088
if(dir != NULL){
1089
closedir(dir);
1285
free(direntries);
1286
1287
if(dir_fd != -1){
1288
close(dir_fd);
1090
1289
}
1091
1290
1092
1291
/* Kill the processes */
1096
1295
ret = kill(p->pid, SIGTERM);
1097
1296
if(ret == -1 and errno != ESRCH){
1098
1297
/* Set-uid proccesses might not get closed */
1099
perror("kill");
1298
error(0, errno, "kill");
1100
1299
}
1101
1300
}
1102
1301
}
1103
1302
1104
1303
/* Wait for any remaining child processes to terminate */
1105
do{
1304
do {
1106
1305
ret = wait(NULL);
1107
1306
} while(ret >= 0);
1108
1307
if(errno != ECHILD){
1109
perror("wait");
1308
error(0, errno, "wait");
1110
1309
}
1111
1310
1112
1311
free_plugin_list();
1113
1312
1114
1313
free(plugindir);
1314
free(pluginhelperdir);
1115
1315
free(argfile);
1116
1316
1117
1317
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0