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- Committer: Teddy Hogeborn
- Date: 2009-01-18 00:18:50 UTC
- mto: (24.1.127 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 249.
- Revision ID: teddy@fukt.bsnet.se-20090118001850-pvg8xjwmbyt23fom
* debian/rules (install-indep): Removed "--no-start" from
dh_installinit.
dh_installinit.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2017 Teddy Hogeborn
6
* Copyright © 2008-2017 Björn Påhlsson
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
O_CLOEXEC, pipe2() */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
36
getgid() */
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() */
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS(), WTERMSIG() */
41
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
43
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* struct dirent, scandirat() */
44
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
45
FD_CLOEXEC, write(), STDOUT_FILENO,
46
struct stat, fstat(), close(),
47
setgid(), setuid(), S_ISREG(),
48
faccessat() pipe2(), fork(),
49
_exit(), dup2(), fexecve(), read()
50
*/
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() */
51
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
52
FD_CLOEXEC, openat(), scandirat(),
53
pipe2() */
54
#include <string.h> /* strsep, strlen(), strsignal(),
55
strcmp(), strncmp() */
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
56
56
#include <errno.h> /* errno */
57
57
#include <argp.h> /* struct argp_option, struct
58
58
argp_state, struct argp,
62
62
#include <signal.h> /* struct sigaction, sigemptyset(),
63
63
sigaddset(), sigaction(),
64
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
SIG_UNBLOCK, kill(), sig_atomic_t
66
*/
65
SIG_UNBLOCK, kill() */
67
66
#include <errno.h> /* errno, EBADF */
68
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
69
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
70
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
71
#include <errno.h> /* errno */
72
#include <error.h> /* error() */
73
#include <fnmatch.h> /* fnmatch() */
67
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
74
68
75
69
#define BUFFER_SIZE 256
76
70
77
71
#define PDIR "/lib/mandos/plugins.d"
78
#define PHDIR "/lib/mandos/plugin-helpers"
79
72
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
73
81
74
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
75
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
76
84
77
typedef struct plugin{
85
78
char *name; /* can be NULL or any plugin name */
88
81
char **environ;
89
82
int envc;
90
83
bool disabled;
91
84
92
85
/* Variables used for running processes*/
93
86
pid_t pid;
94
87
int fd;
96
89
size_t buffer_size;
97
90
size_t buffer_length;
98
91
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
92
volatile bool completed;
93
volatile int status;
101
94
struct plugin *next;
102
95
} plugin;
103
96
105
98
106
99
/* Gets an existing plugin based on name,
107
100
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
101
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
102
/* Check for exiting plugin with that name */
111
103
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
104
if((p->name == name)
113
105
or (p->name and name and (strcmp(p->name, name) == 0))){
115
107
}
116
108
}
117
109
/* Create a new plugin */
118
plugin *new_plugin = NULL;
119
do {
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
110
plugin *new_plugin = malloc(sizeof(plugin));
122
111
if(new_plugin == NULL){
123
112
return NULL;
124
113
}
125
114
char *copy_name = NULL;
126
115
if(name != NULL){
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
116
copy_name = strdup(name);
130
117
if(copy_name == NULL){
131
int e = errno;
132
118
free(new_plugin);
133
errno = e;
134
119
return NULL;
135
120
}
136
121
}
137
122
138
*new_plugin = (plugin){ .name = copy_name,
139
.argc = 1,
140
.disabled = false,
141
.next = plugin_list };
123
*new_plugin = (plugin) { .name = copy_name,
124
.argc = 1,
125
.disabled = false,
126
.next = plugin_list };
142
127
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
128
new_plugin->argv = malloc(sizeof(char *) * 2);
146
129
if(new_plugin->argv == NULL){
147
int e = errno;
148
130
free(copy_name);
149
131
free(new_plugin);
150
errno = e;
151
132
return NULL;
152
133
}
153
134
new_plugin->argv[0] = copy_name;
154
135
new_plugin->argv[1] = NULL;
155
136
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
137
new_plugin->environ = malloc(sizeof(char *));
159
138
if(new_plugin->environ == NULL){
160
int e = errno;
161
139
free(copy_name);
162
140
free(new_plugin->argv);
163
141
free(new_plugin);
164
errno = e;
165
142
return NULL;
166
143
}
167
144
new_plugin->environ[0] = NULL;
172
149
}
173
150
174
151
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
152
static bool add_to_char_array(const char *new, char ***array,
177
153
int *len){
178
154
/* Resize the pointed-to array to hold one more pointer */
179
char **new_array = NULL;
180
do {
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} while(new_array == NULL and errno == EINTR);
155
*array = realloc(*array, sizeof(char *)
156
* (size_t) ((*len) + 2));
184
157
/* Malloc check */
185
if(new_array == NULL){
158
if(*array == NULL){
186
159
return false;
187
160
}
188
*array = new_array;
189
161
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
162
char *copy = strdup(new);
194
163
if(copy == NULL){
195
164
return false;
196
165
}
203
172
}
204
173
205
174
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
175
static bool add_argument(plugin *p, const char *arg){
208
176
if(p == NULL){
209
177
return false;
212
180
}
213
181
214
182
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
183
static bool add_environment(plugin *p, const char *def, bool replace){
217
184
if(p == NULL){
218
185
return false;
220
187
/* namelen = length of name of environment variable */
221
188
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
189
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
190
for(char **e = p->environ; *e != NULL; e++){
191
if(strncmp(*e, def, namelen + 1) == 0){
225
192
/* It already exists */
226
193
if(replace){
227
char *new_envdef;
228
do {
229
new_envdef = realloc(*envdef, strlen(def) + 1);
230
} while(new_envdef == NULL and errno == EINTR);
231
if(new_envdef == NULL){
194
char *new = realloc(*e, strlen(def) + 1);
195
if(new == NULL){
232
196
return false;
233
197
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
198
*e = new;
199
strcpy(*e, def);
236
200
}
237
201
return true;
238
202
}
240
204
return add_to_char_array(def, &(p->environ), &(p->envc));
241
205
}
242
206
243
#ifndef O_CLOEXEC
244
207
/*
245
208
* Based on the example in the GNU LibC manual chapter 13.13 "File
246
209
* Descriptor Flags".
247
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
210
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
211
*/
249
__attribute__((warn_unused_result))
250
212
static int set_cloexec_flag(int fd){
251
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
213
int ret = fcntl(fd, F_GETFD, 0);
252
214
/* If reading the flags failed, return error indication now. */
253
215
if(ret < 0){
254
216
return ret;
255
217
}
256
218
/* Store modified flag word in the descriptor. */
257
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
258
ret | FD_CLOEXEC));
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
259
220
}
260
#endif /* not O_CLOEXEC */
261
221
262
222
263
223
/* Mark processes as completed when they exit, and save their exit
264
224
status. */
265
225
static void handle_sigchld(__attribute__((unused)) int sig){
266
int old_errno = errno;
267
226
while(true){
268
227
plugin *proc = plugin_list;
269
228
int status;
273
232
break;
274
233
}
275
234
if(pid == -1){
276
if(errno == ECHILD){
277
/* No child processes */
278
break;
235
if(errno != ECHILD){
236
perror("waitpid");
279
237
}
280
error(0, errno, "waitpid");
238
/* No child processes */
239
break;
281
240
}
282
241
283
242
/* A child exited, find it in process_list */
289
248
continue;
290
249
}
291
250
proc->status = status;
292
proc->completed = 1;
251
proc->completed = true;
293
252
}
294
errno = old_errno;
295
253
}
296
254
297
255
/* Prints out a password to stdout */
298
__attribute__((nonnull, warn_unused_result))
299
256
static bool print_out_password(const char *buffer, size_t length){
300
257
ssize_t ret;
301
258
for(size_t written = 0; written < length; written += (size_t)ret){
309
266
}
310
267
311
268
/* Removes and free a plugin from the plugin list */
312
__attribute__((nonnull))
313
269
static void free_plugin(plugin *plugin_node){
314
270
315
271
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
321
277
}
322
278
free(plugin_node->environ);
323
279
free(plugin_node->buffer);
324
280
325
281
/* Removes the plugin from the singly-linked list */
326
282
if(plugin_node == plugin_list){
327
283
/* First one - simple */
347
303
348
304
int main(int argc, char *argv[]){
349
305
char *plugindir = NULL;
350
char *pluginhelperdir = NULL;
351
306
char *argfile = NULL;
352
307
FILE *conffp;
353
struct dirent **direntries = NULL;
308
size_t d_name_len;
309
DIR *dir = NULL;
310
struct dirent *dirst;
354
311
struct stat st;
355
312
fd_set rfds_all;
356
int ret, maxfd = 0;
313
int ret, numchars, maxfd = 0;
357
314
ssize_t sret;
315
intmax_t tmpmax;
358
316
uid_t uid = 65534;
359
317
gid_t gid = 65534;
360
318
bool debug = false;
364
322
.sa_flags = SA_NOCLDSTOP };
365
323
char **custom_argv = NULL;
366
324
int custom_argc = 0;
367
int dir_fd = -1;
368
325
369
326
/* Establish a signal handler */
370
327
sigemptyset(&sigchld_action.sa_mask);
371
328
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
372
329
if(ret == -1){
373
error(0, errno, "sigaddset");
374
exitstatus = EX_OSERR;
330
perror("sigaddset");
331
exitstatus = EXIT_FAILURE;
375
332
goto fallback;
376
333
}
377
334
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
378
335
if(ret == -1){
379
error(0, errno, "sigaction");
380
exitstatus = EX_OSERR;
336
perror("sigaction");
337
exitstatus = EXIT_FAILURE;
381
338
goto fallback;
382
339
}
383
340
415
372
.doc = "Group ID the plugins will run as", .group = 3 },
416
373
{ .name = "debug", .key = 132,
417
374
.doc = "Debug mode", .group = 4 },
418
{ .name = "plugin-helper-dir", .key = 133,
419
.arg = "DIRECTORY",
420
.doc = "Specify a different plugin helper directory",
421
.group = 2 },
422
/*
423
* These reproduce what we would get without ARGP_NO_HELP
424
*/
425
{ .name = "help", .key = '?',
426
.doc = "Give this help list", .group = -1 },
427
{ .name = "usage", .key = -3,
428
.doc = "Give a short usage message", .group = -1 },
429
{ .name = "version", .key = 'V',
430
.doc = "Print program version", .group = -1 },
431
375
{ .name = NULL }
432
376
};
433
377
434
__attribute__((nonnull(3)))
435
error_t parse_opt(int key, char *arg, struct argp_state *state){
436
errno = 0;
437
switch(key){
438
char *tmp;
439
intmax_t tmp_id;
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state) {
380
switch(key) {
440
381
case 'g': /* --global-options */
441
{
442
char *plugin_option;
443
while((plugin_option = strsep(&arg, ",")) != NULL){
444
if(not add_argument(getplugin(NULL), plugin_option)){
445
break;
382
if(arg != NULL){
383
char *p;
384
while((p = strsep(&arg, ",")) != NULL){
385
if(p[0] == '\0'){
386
continue;
387
}
388
if(not add_argument(getplugin(NULL), p)){
389
perror("add_argument");
390
return ARGP_ERR_UNKNOWN;
446
391
}
447
392
}
448
errno = 0;
449
393
}
450
394
break;
451
395
case 'G': /* --global-env */
452
if(add_environment(getplugin(NULL), arg, true)){
453
errno = 0;
396
if(arg == NULL){
397
break;
398
}
399
if(not add_environment(getplugin(NULL), arg, true)){
400
perror("add_environment");
454
401
}
455
402
break;
456
403
case 'o': /* --options-for */
457
{
458
char *option_list = strchr(arg, ':');
459
if(option_list == NULL){
460
argp_error(state, "No colon in \"%s\"", arg);
461
errno = EINVAL;
462
break;
463
}
464
*option_list = '\0';
465
option_list++;
466
if(arg[0] == '\0'){
467
argp_error(state, "Empty plugin name");
468
errno = EINVAL;
469
break;
470
}
471
char *option;
472
while((option = strsep(&option_list, ",")) != NULL){
473
if(not add_argument(getplugin(arg), option)){
474
break;
475
}
476
}
477
errno = 0;
404
if(arg != NULL){
405
char *p_name = strsep(&arg, ":");
406
if(p_name[0] == '\0' or arg == NULL){
407
break;
408
}
409
char *opt = strsep(&arg, ":");
410
if(opt[0] == '\0' or opt == NULL){
411
break;
412
}
413
char *p;
414
while((p = strsep(&opt, ",")) != NULL){
415
if(p[0] == '\0'){
416
continue;
417
}
418
if(not add_argument(getplugin(p_name), p)){
419
perror("add_argument");
420
return ARGP_ERR_UNKNOWN;
421
}
422
}
478
423
}
479
424
break;
480
425
case 'E': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
481
429
{
482
430
char *envdef = strchr(arg, ':');
483
431
if(envdef == NULL){
484
argp_error(state, "No colon in \"%s\"", arg);
485
errno = EINVAL;
486
432
break;
487
433
}
488
434
*envdef = '\0';
489
envdef++;
490
if(arg[0] == '\0'){
491
argp_error(state, "Empty plugin name");
492
errno = EINVAL;
493
break;
494
}
495
if(add_environment(getplugin(arg), envdef, true)){
496
errno = 0;
435
if(not add_environment(getplugin(arg), envdef+1, true)){
436
perror("add_environment");
497
437
}
498
438
}
499
439
break;
500
440
case 'd': /* --disable */
501
{
441
if(arg != NULL){
502
442
plugin *p = getplugin(arg);
503
if(p != NULL){
504
p->disabled = true;
505
errno = 0;
443
if(p == NULL){
444
return ARGP_ERR_UNKNOWN;
506
445
}
446
p->disabled = true;
507
447
}
508
448
break;
509
449
case 'e': /* --enable */
510
{
450
if(arg != NULL){
511
451
plugin *p = getplugin(arg);
512
if(p != NULL){
513
p->disabled = false;
514
errno = 0;
452
if(p == NULL){
453
return ARGP_ERR_UNKNOWN;
515
454
}
455
p->disabled = false;
516
456
}
517
457
break;
518
458
case 128: /* --plugin-dir */
519
459
free(plugindir);
520
460
plugindir = strdup(arg);
521
if(plugindir != NULL){
522
errno = 0;
523
}
461
if(plugindir == NULL){
462
perror("strdup");
463
}
524
464
break;
525
465
case 129: /* --config-file */
526
466
/* This is already done by parse_opt_config_file() */
527
467
break;
528
468
case 130: /* --userid */
529
tmp_id = strtoimax(arg, &tmp, 10);
530
if(errno != 0 or tmp == arg or *tmp != '\0'
531
or tmp_id != (uid_t)tmp_id){
532
argp_error(state, "Bad user ID number: \"%s\", using %"
533
PRIdMAX, arg, (intmax_t)uid);
534
break;
469
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
470
if(ret < 1 or tmpmax != (uid_t)tmpmax
471
or arg[numchars] != '\0'){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
535
476
}
536
uid = (uid_t)tmp_id;
537
errno = 0;
538
477
break;
539
478
case 131: /* --groupid */
540
tmp_id = strtoimax(arg, &tmp, 10);
541
if(errno != 0 or tmp == arg or *tmp != '\0'
542
or tmp_id != (gid_t)tmp_id){
543
argp_error(state, "Bad group ID number: \"%s\", using %"
544
PRIdMAX, arg, (intmax_t)gid);
545
break;
479
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
480
if(ret < 1 or tmpmax != (gid_t)tmpmax
481
or arg[numchars] != '\0'){
482
fprintf(stderr, "Bad group ID number: \"%s\", using %"
483
PRIdMAX "\n", arg, (intmax_t)gid);
484
} else {
485
gid = (gid_t)tmpmax;
546
486
}
547
gid = (gid_t)tmp_id;
548
errno = 0;
549
487
break;
550
488
case 132: /* --debug */
551
489
debug = true;
552
490
break;
553
case 133: /* --plugin-helper-dir */
554
free(pluginhelperdir);
555
pluginhelperdir = strdup(arg);
556
if(pluginhelperdir != NULL){
557
errno = 0;
558
}
559
break;
560
/*
561
* These reproduce what we would get without ARGP_NO_HELP
562
*/
563
case '?': /* --help */
564
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
565
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
566
case -3: /* --usage */
567
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
568
argp_state_help(state, state->out_stream,
569
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
570
case 'V': /* --version */
571
fprintf(state->out_stream, "%s\n", argp_program_version);
572
exit(EXIT_SUCCESS);
573
break;
574
491
/*
575
492
* When adding more options before this line, remember to also add a
576
493
* "case" to the "parse_opt_config_file" function below.
579
496
/* Cryptsetup always passes an argument, which is an empty
580
497
string if "none" was specified in /etc/crypttab. So if
581
498
argument was empty, we ignore it silently. */
582
if(arg[0] == '\0'){
583
break;
499
if(arg[0] != '\0'){
500
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
584
501
}
502
break;
503
case ARGP_KEY_END:
504
break;
585
505
default:
586
506
return ARGP_ERR_UNKNOWN;
587
507
}
588
return errno; /* Set to 0 at start */
508
return 0;
589
509
}
590
510
591
511
/* This option parser is the same as parse_opt() above, except it
592
512
ignores everything but the --config-file option. */
593
513
error_t parse_opt_config_file(int key, char *arg,
594
514
__attribute__((unused))
595
struct argp_state *state){
596
errno = 0;
597
switch(key){
515
struct argp_state *state) {
516
switch(key) {
598
517
case 'g': /* --global-options */
599
518
case 'G': /* --global-env */
600
519
case 'o': /* --options-for */
606
525
case 129: /* --config-file */
607
526
free(argfile);
608
527
argfile = strdup(arg);
609
if(argfile != NULL){
610
errno = 0;
528
if(argfile == NULL){
529
perror("strdup");
611
530
}
612
break;
531
break;
613
532
case 130: /* --userid */
614
533
case 131: /* --groupid */
615
534
case 132: /* --debug */
616
case 133: /* --plugin-helper-dir */
617
case '?': /* --help */
618
case -3: /* --usage */
619
case 'V': /* --version */
620
535
case ARGP_KEY_ARG:
536
case ARGP_KEY_END:
621
537
break;
622
538
default:
623
539
return ARGP_ERR_UNKNOWN;
624
540
}
625
return errno;
541
return 0;
626
542
}
627
543
628
544
struct argp argp = { .options = options,
632
548
633
549
/* Parse using parse_opt_config_file() in order to get the custom
634
550
config file location, if any. */
635
ret = argp_parse(&argp, argc, argv,
636
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
637
NULL, NULL);
638
switch(ret){
639
case 0:
640
break;
641
case ENOMEM:
642
default:
643
errno = ret;
644
error(0, errno, "argp_parse");
645
exitstatus = EX_OSERR;
646
goto fallback;
647
case EINVAL:
648
exitstatus = EX_USAGE;
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
553
fprintf(stderr, "Unknown error while parsing arguments\n");
554
exitstatus = EXIT_FAILURE;
649
555
goto fallback;
650
556
}
651
557
657
563
conffp = fopen(AFILE, "r");
658
564
} else {
659
565
conffp = fopen(argfile, "r");
660
}
566
}
661
567
if(conffp != NULL){
662
568
char *org_line = NULL;
663
569
char *p, *arg, *new_arg, *line;
664
570
size_t size = 0;
665
571
const char whitespace_delims[] = " \r\t\f\v\n";
666
572
const char comment_delim[] = "#";
667
573
668
574
custom_argc = 1;
669
575
custom_argv = malloc(sizeof(char*) * 2);
670
576
if(custom_argv == NULL){
671
error(0, errno, "malloc");
672
exitstatus = EX_OSERR;
577
perror("malloc");
578
exitstatus = EXIT_FAILURE;
673
579
goto fallback;
674
580
}
675
581
custom_argv[0] = argv[0];
676
582
custom_argv[1] = NULL;
677
583
678
584
/* for each line in the config file, strip whitespace and ignore
679
585
commented text */
680
586
while(true){
682
588
if(sret == -1){
683
589
break;
684
590
}
685
591
686
592
line = org_line;
687
593
arg = strsep(&line, comment_delim);
688
594
while((p = strsep(&arg, whitespace_delims)) != NULL){
691
597
}
692
598
new_arg = strdup(p);
693
599
if(new_arg == NULL){
694
error(0, errno, "strdup");
695
exitstatus = EX_OSERR;
600
perror("strdup");
601
exitstatus = EXIT_FAILURE;
696
602
free(org_line);
697
603
goto fallback;
698
604
}
699
605
700
606
custom_argc += 1;
701
{
702
char **new_argv = realloc(custom_argv, sizeof(char *)
703
* ((size_t)custom_argc + 1));
704
if(new_argv == NULL){
705
error(0, errno, "realloc");
706
exitstatus = EX_OSERR;
707
free(new_arg);
708
free(org_line);
709
goto fallback;
710
} else {
711
custom_argv = new_argv;
712
}
607
custom_argv = realloc(custom_argv, sizeof(char *)
608
* ((unsigned int) custom_argc + 1));
609
if(custom_argv == NULL){
610
perror("realloc");
611
exitstatus = EXIT_FAILURE;
612
free(org_line);
613
goto fallback;
713
614
}
714
615
custom_argv[custom_argc-1] = new_arg;
715
custom_argv[custom_argc] = NULL;
616
custom_argv[custom_argc] = NULL;
716
617
}
717
618
}
718
do {
719
ret = fclose(conffp);
720
} while(ret == EOF and errno == EINTR);
721
if(ret == EOF){
722
error(0, errno, "fclose");
723
exitstatus = EX_IOERR;
724
goto fallback;
725
}
726
619
free(org_line);
727
620
} else {
728
621
/* Check for harmful errors and go to fallback. Other errors might
729
622
not affect opening plugins */
730
623
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
731
error(0, errno, "fopen");
732
exitstatus = EX_OSERR;
624
perror("fopen");
625
exitstatus = EXIT_FAILURE;
733
626
goto fallback;
734
627
}
735
628
}
736
/* If there were any arguments from the configuration file, pass
737
them to parser as command line arguments */
629
/* If there was any arguments from configuration file,
630
pass them to parser as command arguments */
738
631
if(custom_argv != NULL){
739
ret = argp_parse(&argp, custom_argc, custom_argv,
740
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
741
NULL, NULL);
742
switch(ret){
743
case 0:
744
break;
745
case ENOMEM:
746
default:
747
errno = ret;
748
error(0, errno, "argp_parse");
749
exitstatus = EX_OSERR;
750
goto fallback;
751
case EINVAL:
752
exitstatus = EX_CONFIG;
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
633
0, NULL);
634
if(ret == ARGP_ERR_UNKNOWN){
635
fprintf(stderr, "Unknown error while parsing arguments\n");
636
exitstatus = EXIT_FAILURE;
753
637
goto fallback;
754
638
}
755
639
}
756
640
757
641
/* Parse actual command line arguments, to let them override the
758
642
config file */
759
ret = argp_parse(&argp, argc, argv,
760
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
761
NULL, NULL);
762
switch(ret){
763
case 0:
764
break;
765
case ENOMEM:
766
default:
767
errno = ret;
768
error(0, errno, "argp_parse");
769
exitstatus = EX_OSERR;
770
goto fallback;
771
case EINVAL:
772
exitstatus = EX_USAGE;
773
goto fallback;
774
}
775
776
{
777
char *pluginhelperenv;
778
bool bret = true;
779
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
780
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
781
if(ret != -1){
782
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
783
}
784
if(ret == -1 or not bret){
785
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
786
" environment variable to \"%s\" for all plugins\n",
787
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
788
}
789
if(ret != -1){
790
free(pluginhelperenv);
791
}
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
645
fprintf(stderr, "Unknown error while parsing arguments\n");
646
exitstatus = EXIT_FAILURE;
647
goto fallback;
792
648
}
793
649
794
650
if(debug){
795
for(plugin *p = plugin_list; p != NULL; p = p->next){
651
for(plugin *p = plugin_list; p != NULL; p=p->next){
796
652
fprintf(stderr, "Plugin: %s has %d arguments\n",
797
653
p->name ? p->name : "Global", p->argc - 1);
798
654
for(char **a = p->argv; *a != NULL; a++){
805
661
}
806
662
}
807
663
808
if(getuid() == 0){
809
/* Work around Debian bug #633582:
810
<https://bugs.debian.org/633582> */
811
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
812
if(plugindir_fd == -1){
813
if(errno != ENOENT){
814
error(0, errno, "open(\"" PDIR "\")");
815
}
816
} else {
817
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
818
if(ret == -1){
819
error(0, errno, "fstat");
820
} else {
821
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
822
ret = fchown(plugindir_fd, uid, gid);
823
if(ret == -1){
824
error(0, errno, "fchown");
825
}
826
}
827
}
828
close(plugindir_fd);
829
}
830
}
831
832
/* Lower permissions */
833
ret = setgid(gid);
834
if(ret == -1){
835
error(0, errno, "setgid");
836
}
664
/* Strip permissions down to nobody */
837
665
ret = setuid(uid);
838
666
if(ret == -1){
839
error(0, errno, "setuid");
840
}
841
842
/* Open plugin directory with close_on_exec flag */
667
perror("setuid");
668
}
669
setgid(gid);
670
if(ret == -1){
671
perror("setgid");
672
}
673
674
if(plugindir == NULL){
675
dir = opendir(PDIR);
676
} else {
677
dir = opendir(plugindir);
678
}
679
680
if(dir == NULL){
681
perror("Could not open plugin dir");
682
exitstatus = EXIT_FAILURE;
683
goto fallback;
684
}
685
686
/* Set the FD_CLOEXEC flag on the directory, if possible */
843
687
{
844
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
845
#ifdef O_CLOEXEC
846
O_CLOEXEC
847
#else /* not O_CLOEXEC */
848
0
849
#endif /* not O_CLOEXEC */
850
);
851
if(dir_fd == -1){
852
error(0, errno, "Could not open plugin dir");
853
exitstatus = EX_UNAVAILABLE;
854
goto fallback;
855
}
856
857
#ifndef O_CLOEXEC
858
/* Set the FD_CLOEXEC flag on the directory */
859
ret = set_cloexec_flag(dir_fd);
860
if(ret < 0){
861
error(0, errno, "set_cloexec_flag");
862
exitstatus = EX_OSERR;
863
goto fallback;
864
}
865
#endif /* O_CLOEXEC */
866
}
867
868
int good_name(const struct dirent * const dirent){
869
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
870
"*.dpkg-old", "*.dpkg-bak",
871
"*.dpkg-divert", NULL };
872
#ifdef __GNUC__
873
#pragma GCC diagnostic push
874
#pragma GCC diagnostic ignored "-Wcast-qual"
875
#endif
876
for(const char **pat = (const char **)patterns;
877
*pat != NULL; pat++){
878
#ifdef __GNUC__
879
#pragma GCC diagnostic pop
880
#endif
881
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
882
!= FNM_NOMATCH){
883
if(debug){
884
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
885
" matching pattern %s\n", dirent->d_name, *pat);
886
}
887
return 0;
688
int dir_fd = dirfd(dir);
689
if(dir_fd >= 0){
690
ret = set_cloexec_flag(dir_fd);
691
if(ret < 0){
692
perror("set_cloexec_flag");
693
exitstatus = EXIT_FAILURE;
694
goto fallback;
888
695
}
889
696
}
890
return 1;
891
}
892
893
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
894
alphasort);
895
if(numplugins == -1){
896
error(0, errno, "Could not scan plugin dir");
897
direntries = NULL;
898
exitstatus = EX_OSERR;
899
goto fallback;
900
697
}
901
698
902
699
FD_ZERO(&rfds_all);
903
700
904
701
/* Read and execute any executable in the plugin directory*/
905
for(int i = 0; i < numplugins; i++){
906
907
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
908
if(plugin_fd == -1){
909
error(0, errno, "Could not open plugin");
910
free(direntries[i]);
702
while(true){
703
dirst = readdir(dir);
704
705
/* All directory entries have been processed */
706
if(dirst == NULL){
707
if(errno == EBADF){
708
perror("readdir");
709
exitstatus = EXIT_FAILURE;
710
goto fallback;
711
}
712
break;
713
}
714
715
d_name_len = strlen(dirst->d_name);
716
717
/* Ignore dotfiles, backup files and other junk */
718
{
719
bool bad_name = false;
720
721
const char const *bad_prefixes[] = { ".", "#", NULL };
722
723
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
724
".dpkg-old",
725
".dpkg-bak",
726
".dpkg-divert", NULL };
727
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
728
size_t pre_len = strlen(*pre);
729
if((d_name_len >= pre_len)
730
and strncmp((dirst->d_name), *pre, pre_len) == 0){
731
if(debug){
732
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
733
" with bad prefix %s\n", dirst->d_name, *pre);
734
}
735
bad_name = true;
736
break;
737
}
738
}
739
if(bad_name){
740
continue;
741
}
742
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
743
size_t suf_len = strlen(*suf);
744
if((d_name_len >= suf_len)
745
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
746
== 0)){
747
if(debug){
748
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
749
" with bad suffix %s\n", dirst->d_name, *suf);
750
}
751
bad_name = true;
752
break;
753
}
754
}
755
756
if(bad_name){
757
continue;
758
}
759
}
760
761
char *filename;
762
if(plugindir == NULL){
763
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
764
} else {
765
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
766
}
767
if(ret < 0){
768
perror("asprintf");
911
769
continue;
912
770
}
913
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
771
772
ret = stat(filename, &st);
914
773
if(ret == -1){
915
error(0, errno, "stat");
916
close(plugin_fd);
917
free(direntries[i]);
774
perror("stat");
775
free(filename);
918
776
continue;
919
777
}
920
778
921
779
/* Ignore non-executable files */
922
if(not S_ISREG(st.st_mode)
923
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
924
X_OK, 0)) != 0)){
780
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
925
781
if(debug){
926
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
927
" with bad type or mode\n",
928
plugindir != NULL ? plugindir : PDIR,
929
direntries[i]->d_name);
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
783
" with bad type or mode\n", filename);
930
784
}
931
close(plugin_fd);
932
free(direntries[i]);
785
free(filename);
933
786
continue;
934
787
}
935
788
936
plugin *p = getplugin(direntries[i]->d_name);
789
plugin *p = getplugin(dirst->d_name);
937
790
if(p == NULL){
938
error(0, errno, "getplugin");
939
close(plugin_fd);
940
free(direntries[i]);
791
perror("getplugin");
792
free(filename);
941
793
continue;
942
794
}
943
795
if(p->disabled){
944
796
if(debug){
945
797
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
946
direntries[i]->d_name);
798
dirst->d_name);
947
799
}
948
close(plugin_fd);
949
free(direntries[i]);
800
free(filename);
950
801
continue;
951
802
}
952
803
{
955
806
if(g != NULL){
956
807
for(char **a = g->argv + 1; *a != NULL; a++){
957
808
if(not add_argument(p, *a)){
958
error(0, errno, "add_argument");
809
perror("add_argument");
959
810
}
960
811
}
961
812
/* Add global environment variables */
962
813
for(char **e = g->environ; *e != NULL; e++){
963
814
if(not add_environment(p, *e, false)){
964
error(0, errno, "add_environment");
815
perror("add_environment");
965
816
}
966
817
}
967
818
}
968
819
}
969
/* If this plugin has any environment variables, we need to
970
duplicate the environment from this process, too. */
820
/* If this plugin has any environment variables, we will call
821
using execve and need to duplicate the environment from this
822
process, too. */
971
823
if(p->environ[0] != NULL){
972
824
for(char **e = environ; *e != NULL; e++){
973
825
if(not add_environment(p, *e, false)){
974
error(0, errno, "add_environment");
826
perror("add_environment");
975
827
}
976
828
}
977
829
}
978
830
979
831
int pipefd[2];
980
#ifndef O_CLOEXEC
981
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
982
#else /* O_CLOEXEC */
983
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
984
#endif /* O_CLOEXEC */
832
ret = pipe(pipefd);
985
833
if(ret == -1){
986
error(0, errno, "pipe");
987
exitstatus = EX_OSERR;
988
free(direntries[i]);
989
goto fallback;
990
}
991
if(pipefd[0] >= FD_SETSIZE){
992
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
993
FD_SETSIZE);
994
close(pipefd[0]);
995
close(pipefd[1]);
996
exitstatus = EX_OSERR;
997
free(direntries[i]);
998
goto fallback;
999
}
1000
#ifndef O_CLOEXEC
834
perror("pipe");
835
exitstatus = EXIT_FAILURE;
836
goto fallback;
837
}
1001
838
/* Ask OS to automatic close the pipe on exec */
1002
839
ret = set_cloexec_flag(pipefd[0]);
1003
840
if(ret < 0){
1004
error(0, errno, "set_cloexec_flag");
1005
close(pipefd[0]);
1006
close(pipefd[1]);
1007
exitstatus = EX_OSERR;
1008
free(direntries[i]);
841
perror("set_cloexec_flag");
842
exitstatus = EXIT_FAILURE;
1009
843
goto fallback;
1010
844
}
1011
845
ret = set_cloexec_flag(pipefd[1]);
1012
846
if(ret < 0){
1013
error(0, errno, "set_cloexec_flag");
1014
close(pipefd[0]);
1015
close(pipefd[1]);
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
847
perror("set_cloexec_flag");
848
exitstatus = EXIT_FAILURE;
1018
849
goto fallback;
1019
850
}
1020
#endif /* not O_CLOEXEC */
1021
851
/* Block SIGCHLD until process is safely in process list */
1022
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1023
&sigchld_action.sa_mask,
1024
NULL));
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1025
853
if(ret < 0){
1026
error(0, errno, "sigprocmask");
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
1029
856
goto fallback;
1030
857
}
1031
858
/* Starting a new process to be watched */
1032
pid_t pid;
1033
do {
1034
pid = fork();
1035
} while(pid == -1 and errno == EINTR);
859
pid_t pid = fork();
1036
860
if(pid == -1){
1037
error(0, errno, "fork");
1038
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1039
&sigchld_action.sa_mask, NULL));
1040
close(pipefd[0]);
1041
close(pipefd[1]);
1042
exitstatus = EX_OSERR;
1043
free(direntries[i]);
861
perror("fork");
862
exitstatus = EXIT_FAILURE;
1044
863
goto fallback;
1045
864
}
1046
865
if(pid == 0){
1047
866
/* this is the child process */
1048
867
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1049
868
if(ret < 0){
1050
error(0, errno, "sigaction");
1051
_exit(EX_OSERR);
869
perror("sigaction");
870
_exit(EXIT_FAILURE);
1052
871
}
1053
872
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1054
873
if(ret < 0){
1055
error(0, errno, "sigprocmask");
1056
_exit(EX_OSERR);
874
perror("sigprocmask");
875
_exit(EXIT_FAILURE);
1057
876
}
1058
877
1059
878
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1060
879
if(ret == -1){
1061
error(0, errno, "dup2");
1062
_exit(EX_OSERR);
880
perror("dup2");
881
_exit(EXIT_FAILURE);
1063
882
}
1064
883
1065
if(fexecve(plugin_fd, p->argv,
1066
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1067
error(0, errno, "fexecve for %s/%s",
1068
plugindir != NULL ? plugindir : PDIR,
1069
direntries[i]->d_name);
1070
_exit(EX_OSERR);
884
if(dirfd(dir) < 0){
885
/* If dir has no file descriptor, we could not set FD_CLOEXEC
886
above and must now close it manually here. */
887
closedir(dir);
888
}
889
if(p->environ[0] == NULL){
890
if(execv(filename, p->argv) < 0){
891
perror("execv");
892
_exit(EXIT_FAILURE);
893
}
894
} else {
895
if(execve(filename, p->argv, p->environ) < 0){
896
perror("execve");
897
_exit(EXIT_FAILURE);
898
}
1071
899
}
1072
900
/* no return */
1073
901
}
1074
902
/* Parent process */
1075
903
close(pipefd[1]); /* Close unused write end of pipe */
1076
close(plugin_fd);
1077
plugin *new_plugin = getplugin(direntries[i]->d_name);
904
free(filename);
905
plugin *new_plugin = getplugin(dirst->d_name);
1078
906
if(new_plugin == NULL){
1079
error(0, errno, "getplugin");
1080
ret = (int)(TEMP_FAILURE_RETRY
1081
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1082
NULL)));
907
perror("getplugin");
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1083
909
if(ret < 0){
1084
error(0, errno, "sigprocmask");
910
perror("sigprocmask");
1085
911
}
1086
exitstatus = EX_OSERR;
1087
free(direntries[i]);
912
exitstatus = EXIT_FAILURE;
1088
913
goto fallback;
1089
914
}
1090
free(direntries[i]);
1091
915
1092
916
new_plugin->pid = pid;
1093
917
new_plugin->fd = pipefd[0];
1094
918
1095
919
/* Unblock SIGCHLD so signal handler can be run if this process
1096
920
has already completed */
1097
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1098
&sigchld_action.sa_mask,
1099
NULL));
921
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1100
922
if(ret < 0){
1101
error(0, errno, "sigprocmask");
1102
exitstatus = EX_OSERR;
923
perror("sigprocmask");
924
exitstatus = EXIT_FAILURE;
1103
925
goto fallback;
1104
926
}
1105
927
1110
932
}
1111
933
}
1112
934
1113
free(direntries);
1114
direntries = NULL;
1115
close(dir_fd);
1116
dir_fd = -1;
1117
free_plugin(getplugin(NULL));
935
closedir(dir);
936
dir = NULL;
1118
937
1119
938
for(plugin *p = plugin_list; p != NULL; p = p->next){
1120
939
if(p->pid != 0){
1131
950
while(plugin_list){
1132
951
fd_set rfds = rfds_all;
1133
952
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1134
if(select_ret == -1 and errno != EINTR){
1135
error(0, errno, "select");
1136
exitstatus = EX_OSERR;
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1137
956
goto fallback;
1138
957
}
1139
958
/* OK, now either a process completed, or something can be read
1140
959
from one of them */
1141
960
for(plugin *proc = plugin_list; proc != NULL;){
1142
961
/* Is this process completely done? */
1143
if(proc->completed and proc->eof){
962
if(proc->eof and proc->completed){
1144
963
/* Only accept the plugin output if it exited cleanly */
1145
964
if(not WIFEXITED(proc->status)
1146
965
or WEXITSTATUS(proc->status) != 0){
1147
966
/* Bad exit by plugin */
1148
967
1149
968
if(debug){
1150
969
if(WIFEXITED(proc->status)){
1151
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1152
" status %d\n", proc->name,
1153
(intmax_t) (proc->pid),
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %d\n", (intmax_t) (proc->pid),
1154
972
WEXITSTATUS(proc->status));
1155
} else if(WIFSIGNALED(proc->status)){
1156
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1157
" signal %d: %s\n", proc->name,
1158
(intmax_t) (proc->pid),
1159
WTERMSIG(proc->status),
1160
strsignal(WTERMSIG(proc->status)));
973
} else if(WIFSIGNALED(proc->status)) {
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
976
WTERMSIG(proc->status));
977
} else if(WCOREDUMP(proc->status)){
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(intmax_t) (proc->pid));
1161
980
}
1162
981
}
1163
982
1164
983
/* Remove the plugin */
1165
984
FD_CLR(proc->fd, &rfds_all);
1166
985
1167
986
/* Block signal while modifying process_list */
1168
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1169
(SIG_BLOCK,
1170
&sigchld_action.sa_mask,
1171
NULL));
987
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1172
988
if(ret < 0){
1173
error(0, errno, "sigprocmask");
1174
exitstatus = EX_OSERR;
989
perror("sigprocmask");
990
exitstatus = EXIT_FAILURE;
1175
991
goto fallback;
1176
992
}
1177
993
1180
996
proc = next_plugin;
1181
997
1182
998
/* We are done modifying process list, so unblock signal */
1183
ret = (int)(TEMP_FAILURE_RETRY
1184
(sigprocmask(SIG_UNBLOCK,
1185
&sigchld_action.sa_mask, NULL)));
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1000
NULL);
1186
1001
if(ret < 0){
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1189
1004
goto fallback;
1190
1005
}
1191
1006
1201
1016
bool bret = print_out_password(proc->buffer,
1202
1017
proc->buffer_length);
1203
1018
if(not bret){
1204
error(0, errno, "print_out_password");
1205
exitstatus = EX_IOERR;
1019
perror("print_out_password");
1020
exitstatus = EXIT_FAILURE;
1206
1021
}
1207
1022
goto fallback;
1208
1023
}
1215
1030
}
1216
1031
/* Before reading, make the process' data buffer large enough */
1217
1032
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1218
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1219
+ (size_t) BUFFER_SIZE);
1220
if(new_buffer == NULL){
1221
error(0, errno, "malloc");
1222
exitstatus = EX_OSERR;
1033
proc->buffer = realloc(proc->buffer, proc->buffer_size
1034
+ (size_t) BUFFER_SIZE);
1035
if(proc->buffer == NULL){
1036
perror("malloc");
1037
exitstatus = EXIT_FAILURE;
1223
1038
goto fallback;
1224
1039
}
1225
proc->buffer = new_buffer;
1226
1040
proc->buffer_size += BUFFER_SIZE;
1227
1041
}
1228
1042
/* Read from the process */
1229
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1230
proc->buffer
1231
+ proc->buffer_length,
1232
BUFFER_SIZE));
1043
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1044
BUFFER_SIZE);
1233
1045
if(sret < 0){
1234
1046
/* Read error from this process; ignore the error */
1235
1047
proc = proc->next;
1243
1055
}
1244
1056
}
1245
1057
}
1246
1247
1058
1059
1248
1060
fallback:
1249
1061
1250
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1251
and exitstatus != EX_OK)){
1062
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1252
1063
/* Fallback if all plugins failed, none are found or an error
1253
1064
occured */
1254
1065
bool bret;
1262
1073
}
1263
1074
bret = print_out_password(passwordbuffer, len);
1264
1075
if(not bret){
1265
error(0, errno, "print_out_password");
1266
exitstatus = EX_IOERR;
1076
perror("print_out_password");
1077
exitstatus = EXIT_FAILURE;
1267
1078
}
1268
1079
}
1269
1080
1270
1081
/* Restore old signal handler */
1271
1082
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1272
1083
if(ret == -1){
1273
error(0, errno, "sigaction");
1274
exitstatus = EX_OSERR;
1084
perror("sigaction");
1085
exitstatus = EXIT_FAILURE;
1275
1086
}
1276
1087
1277
1088
if(custom_argv != NULL){
1281
1092
free(custom_argv);
1282
1093
}
1283
1094
1284
free(direntries);
1285
1286
if(dir_fd != -1){
1287
close(dir_fd);
1095
if(dir != NULL){
1096
closedir(dir);
1288
1097
}
1289
1098
1290
1099
/* Kill the processes */
1294
1103
ret = kill(p->pid, SIGTERM);
1295
1104
if(ret == -1 and errno != ESRCH){
1296
1105
/* Set-uid proccesses might not get closed */
1297
error(0, errno, "kill");
1106
perror("kill");
1298
1107
}
1299
1108
}
1300
1109
}
1301
1110
1302
1111
/* Wait for any remaining child processes to terminate */
1303
do {
1112
do{
1304
1113
ret = wait(NULL);
1305
1114
} while(ret >= 0);
1306
1115
if(errno != ECHILD){
1307
error(0, errno, "wait");
1116
perror("wait");
1308
1117
}
1309
1118
1310
1119
free_plugin_list();
1311
1120
1312
1121
free(plugindir);
1313
free(pluginhelperdir);
1314
1122
free(argfile);
1315
1123
1316
1124
return exitstatus;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0