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- Committer: Björn Påhlsson
- Date: 2009-02-09 05:09:39 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 250.
- Revision ID: belorn@braxen-20090209050939-ml95liuwtbn9kjtb
plugin-runner: Added support for empty string arguments
Fixed bug where IP:port argument failed
mandos-client: Fixed bug where files wasnt removed after sigterm signal
Fixed bug where IP:port argument failed
mandos-client: Fixed bug where files wasnt removed after sigterm signal
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 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
WCOREDUMP() */
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
43
#include <iso646.h> /* and, or, not */
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
*/
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() */
52
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
54
pipe2() */
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
57
56
#include <errno.h> /* errno */
58
57
#include <argp.h> /* struct argp_option, struct
59
58
argp_state, struct argp,
63
62
#include <signal.h> /* struct sigaction, sigemptyset(),
64
63
sigaddset(), sigaction(),
65
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
66
SIG_UNBLOCK, kill(), sig_atomic_t
67
*/
65
SIG_UNBLOCK, kill() */
68
66
#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
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
75
68
76
69
#define BUFFER_SIZE 256
77
70
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;
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
}
140
125
.disabled = false,
141
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
277
237
/* No child processes */
278
238
break;
279
239
}
280
error(0, errno, "waitpid");
240
perror("waitpid");
281
241
}
282
242
283
243
/* A child exited, find it in process_list */
295
255
}
296
256
297
257
/* Prints out a password to stdout */
298
__attribute__((nonnull, warn_unused_result))
299
258
static bool print_out_password(const char *buffer, size_t length){
300
259
ssize_t ret;
301
260
for(size_t written = 0; written < length; written += (size_t)ret){
309
268
}
310
269
311
270
/* Removes and free a plugin from the plugin list */
312
__attribute__((nonnull))
313
271
static void free_plugin(plugin *plugin_node){
314
272
315
273
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
321
279
}
322
280
free(plugin_node->environ);
323
281
free(plugin_node->buffer);
324
282
325
283
/* Removes the plugin from the singly-linked list */
326
284
if(plugin_node == plugin_list){
327
285
/* First one - simple */
349
307
char *plugindir = NULL;
350
308
char *argfile = NULL;
351
309
FILE *conffp;
352
struct dirent **direntries = NULL;
310
size_t d_name_len;
311
DIR *dir = NULL;
312
struct dirent *dirst;
353
313
struct stat st;
354
314
fd_set rfds_all;
355
int ret, maxfd = 0;
315
int ret, numchars, maxfd = 0;
356
316
ssize_t sret;
317
intmax_t tmpmax;
357
318
uid_t uid = 65534;
358
319
gid_t gid = 65534;
359
320
bool debug = false;
363
324
.sa_flags = SA_NOCLDSTOP };
364
325
char **custom_argv = NULL;
365
326
int custom_argc = 0;
366
int dir_fd = -1;
367
327
368
328
/* Establish a signal handler */
369
329
sigemptyset(&sigchld_action.sa_mask);
370
330
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
371
331
if(ret == -1){
372
error(0, errno, "sigaddset");
373
exitstatus = EX_OSERR;
332
perror("sigaddset");
333
exitstatus = EXIT_FAILURE;
374
334
goto fallback;
375
335
}
376
336
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
377
337
if(ret == -1){
378
error(0, errno, "sigaction");
379
exitstatus = EX_OSERR;
338
perror("sigaction");
339
exitstatus = EXIT_FAILURE;
380
340
goto fallback;
381
341
}
382
342
414
374
.doc = "Group ID the plugins will run as", .group = 3 },
415
375
{ .name = "debug", .key = 132,
416
376
.doc = "Debug mode", .group = 4 },
417
/*
418
* These reproduce what we would get without ARGP_NO_HELP
419
*/
420
{ .name = "help", .key = '?',
421
.doc = "Give this help list", .group = -1 },
422
{ .name = "usage", .key = -3,
423
.doc = "Give a short usage message", .group = -1 },
424
{ .name = "version", .key = 'V',
425
.doc = "Print program version", .group = -1 },
426
377
{ .name = NULL }
427
378
};
428
379
429
__attribute__((nonnull(3)))
430
error_t parse_opt(int key, char *arg, struct argp_state *state){
431
errno = 0;
380
error_t parse_opt(int key, char *arg, __attribute__((unused))
381
struct argp_state *state){
432
382
switch(key){
433
char *tmp;
434
intmax_t tmp_id;
435
383
case 'g': /* --global-options */
436
{
384
if(arg != NULL){
437
385
char *plugin_option;
438
386
while((plugin_option = strsep(&arg, ",")) != NULL){
387
if(plugin_option[0] == '\0'){
388
continue;
389
}
439
390
if(not add_argument(getplugin(NULL), plugin_option)){
440
break;
391
perror("add_argument");
392
return ARGP_ERR_UNKNOWN;
441
393
}
442
394
}
443
errno = 0;
444
395
}
445
396
break;
446
397
case 'G': /* --global-env */
447
if(add_environment(getplugin(NULL), arg, true)){
448
errno = 0;
398
if(arg == NULL){
399
break;
400
}
401
if(not add_environment(getplugin(NULL), arg, true)){
402
perror("add_environment");
449
403
}
450
404
break;
451
405
case 'o': /* --options-for */
452
{
453
char *option_list = strchr(arg, ':');
454
if(option_list == NULL){
455
argp_error(state, "No colon in \"%s\"", arg);
456
errno = EINVAL;
457
break;
458
}
459
*option_list = '\0';
460
option_list++;
461
if(arg[0] == '\0'){
462
argp_error(state, "Empty plugin name");
463
errno = EINVAL;
464
break;
465
}
466
char *option;
467
while((option = strsep(&option_list, ",")) != NULL){
468
if(not add_argument(getplugin(arg), option)){
469
break;
406
if(arg != NULL){
407
char *plugin_name = strsep(&arg, ":");
408
if(plugin_name[0] == '\0'){
409
break;
410
}
411
char *plugin_option;
412
while((plugin_option = strsep(&arg, ",")) != NULL){
413
if(not add_argument(getplugin(plugin_name), plugin_option)){
414
perror("add_argument");
415
return ARGP_ERR_UNKNOWN;
470
416
}
471
417
}
472
errno = 0;
473
418
}
474
419
break;
475
420
case 'E': /* --env-for */
421
if(arg == NULL){
422
break;
423
}
476
424
{
477
425
char *envdef = strchr(arg, ':');
478
426
if(envdef == NULL){
479
argp_error(state, "No colon in \"%s\"", arg);
480
errno = EINVAL;
481
427
break;
482
428
}
483
429
*envdef = '\0';
484
envdef++;
485
if(arg[0] == '\0'){
486
argp_error(state, "Empty plugin name");
487
errno = EINVAL;
488
break;
489
}
490
if(add_environment(getplugin(arg), envdef, true)){
491
errno = 0;
430
if(not add_environment(getplugin(arg), envdef+1, true)){
431
perror("add_environment");
492
432
}
493
433
}
494
434
break;
495
435
case 'd': /* --disable */
496
{
436
if(arg != NULL){
497
437
plugin *p = getplugin(arg);
498
if(p != NULL){
499
p->disabled = true;
500
errno = 0;
438
if(p == NULL){
439
return ARGP_ERR_UNKNOWN;
501
440
}
441
p->disabled = true;
502
442
}
503
443
break;
504
444
case 'e': /* --enable */
505
{
445
if(arg != NULL){
506
446
plugin *p = getplugin(arg);
507
if(p != NULL){
508
p->disabled = false;
509
errno = 0;
447
if(p == NULL){
448
return ARGP_ERR_UNKNOWN;
510
449
}
450
p->disabled = false;
511
451
}
512
452
break;
513
453
case 128: /* --plugin-dir */
514
454
free(plugindir);
515
455
plugindir = strdup(arg);
516
if(plugindir != NULL){
517
errno = 0;
518
}
456
if(plugindir == NULL){
457
perror("strdup");
458
}
519
459
break;
520
460
case 129: /* --config-file */
521
461
/* This is already done by parse_opt_config_file() */
522
462
break;
523
463
case 130: /* --userid */
524
tmp_id = strtoimax(arg, &tmp, 10);
525
if(errno != 0 or tmp == arg or *tmp != '\0'
526
or tmp_id != (uid_t)tmp_id){
527
argp_error(state, "Bad user ID number: \"%s\", using %"
528
PRIdMAX, arg, (intmax_t)uid);
529
break;
464
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
465
if(ret < 1 or tmpmax != (uid_t)tmpmax
466
or arg[numchars] != '\0'){
467
fprintf(stderr, "Bad user ID number: \"%s\", using %"
468
PRIdMAX "\n", arg, (intmax_t)uid);
469
} else {
470
uid = (uid_t)tmpmax;
530
471
}
531
uid = (uid_t)tmp_id;
532
errno = 0;
533
472
break;
534
473
case 131: /* --groupid */
535
tmp_id = strtoimax(arg, &tmp, 10);
536
if(errno != 0 or tmp == arg or *tmp != '\0'
537
or tmp_id != (gid_t)tmp_id){
538
argp_error(state, "Bad group ID number: \"%s\", using %"
539
PRIdMAX, arg, (intmax_t)gid);
540
break;
474
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
475
if(ret < 1 or tmpmax != (gid_t)tmpmax
476
or arg[numchars] != '\0'){
477
fprintf(stderr, "Bad group ID number: \"%s\", using %"
478
PRIdMAX "\n", arg, (intmax_t)gid);
479
} else {
480
gid = (gid_t)tmpmax;
541
481
}
542
gid = (gid_t)tmp_id;
543
errno = 0;
544
482
break;
545
483
case 132: /* --debug */
546
484
debug = true;
547
485
break;
548
/*
549
* These reproduce what we would get without ARGP_NO_HELP
550
*/
551
case '?': /* --help */
552
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
553
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
554
case -3: /* --usage */
555
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
556
argp_state_help(state, state->out_stream,
557
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
558
case 'V': /* --version */
559
fprintf(state->out_stream, "%s\n", argp_program_version);
560
exit(EXIT_SUCCESS);
561
break;
562
486
/*
563
487
* When adding more options before this line, remember to also add a
564
488
* "case" to the "parse_opt_config_file" function below.
567
491
/* Cryptsetup always passes an argument, which is an empty
568
492
string if "none" was specified in /etc/crypttab. So if
569
493
argument was empty, we ignore it silently. */
570
if(arg[0] == '\0'){
571
break;
494
if(arg[0] != '\0'){
495
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
572
496
}
497
break;
498
case ARGP_KEY_END:
499
break;
573
500
default:
574
501
return ARGP_ERR_UNKNOWN;
575
502
}
576
return errno; /* Set to 0 at start */
503
return 0;
577
504
}
578
505
579
506
/* This option parser is the same as parse_opt() above, except it
581
508
error_t parse_opt_config_file(int key, char *arg,
582
509
__attribute__((unused))
583
510
struct argp_state *state){
584
errno = 0;
585
511
switch(key){
586
512
case 'g': /* --global-options */
587
513
case 'G': /* --global-env */
594
520
case 129: /* --config-file */
595
521
free(argfile);
596
522
argfile = strdup(arg);
597
if(argfile != NULL){
598
errno = 0;
523
if(argfile == NULL){
524
perror("strdup");
599
525
}
600
break;
526
break;
601
527
case 130: /* --userid */
602
528
case 131: /* --groupid */
603
529
case 132: /* --debug */
604
case '?': /* --help */
605
case -3: /* --usage */
606
case 'V': /* --version */
607
530
case ARGP_KEY_ARG:
531
case ARGP_KEY_END:
608
532
break;
609
533
default:
610
534
return ARGP_ERR_UNKNOWN;
611
535
}
612
return errno;
536
return 0;
613
537
}
614
538
615
539
struct argp argp = { .options = options,
619
543
620
544
/* Parse using parse_opt_config_file() in order to get the custom
621
545
config file location, if any. */
622
ret = argp_parse(&argp, argc, argv,
623
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
624
NULL, NULL);
625
switch(ret){
626
case 0:
627
break;
628
case ENOMEM:
629
default:
630
errno = ret;
631
error(0, errno, "argp_parse");
632
exitstatus = EX_OSERR;
633
goto fallback;
634
case EINVAL:
635
exitstatus = EX_USAGE;
546
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
547
if(ret == ARGP_ERR_UNKNOWN){
548
fprintf(stderr, "Unknown error while parsing arguments\n");
549
exitstatus = EXIT_FAILURE;
636
550
goto fallback;
637
551
}
638
552
644
558
conffp = fopen(AFILE, "r");
645
559
} else {
646
560
conffp = fopen(argfile, "r");
647
}
561
}
648
562
if(conffp != NULL){
649
563
char *org_line = NULL;
650
564
char *p, *arg, *new_arg, *line;
651
565
size_t size = 0;
652
566
const char whitespace_delims[] = " \r\t\f\v\n";
653
567
const char comment_delim[] = "#";
654
568
655
569
custom_argc = 1;
656
570
custom_argv = malloc(sizeof(char*) * 2);
657
571
if(custom_argv == NULL){
658
error(0, errno, "malloc");
659
exitstatus = EX_OSERR;
572
perror("malloc");
573
exitstatus = EXIT_FAILURE;
660
574
goto fallback;
661
575
}
662
576
custom_argv[0] = argv[0];
663
577
custom_argv[1] = NULL;
664
578
665
579
/* for each line in the config file, strip whitespace and ignore
666
580
commented text */
667
581
while(true){
669
583
if(sret == -1){
670
584
break;
671
585
}
672
586
673
587
line = org_line;
674
588
arg = strsep(&line, comment_delim);
675
589
while((p = strsep(&arg, whitespace_delims)) != NULL){
678
592
}
679
593
new_arg = strdup(p);
680
594
if(new_arg == NULL){
681
error(0, errno, "strdup");
682
exitstatus = EX_OSERR;
595
perror("strdup");
596
exitstatus = EXIT_FAILURE;
683
597
free(org_line);
684
598
goto fallback;
685
599
}
686
600
687
601
custom_argc += 1;
688
{
689
char **new_argv = realloc(custom_argv, sizeof(char *)
690
* ((unsigned int)
691
custom_argc + 1));
692
if(new_argv == NULL){
693
error(0, errno, "realloc");
694
exitstatus = EX_OSERR;
695
free(new_arg);
696
free(org_line);
697
goto fallback;
698
} else {
699
custom_argv = new_argv;
700
}
602
custom_argv = realloc(custom_argv, sizeof(char *)
603
* ((unsigned int) custom_argc + 1));
604
if(custom_argv == NULL){
605
perror("realloc");
606
exitstatus = EXIT_FAILURE;
607
free(org_line);
608
goto fallback;
701
609
}
702
610
custom_argv[custom_argc-1] = new_arg;
703
custom_argv[custom_argc] = NULL;
611
custom_argv[custom_argc] = NULL;
704
612
}
705
613
}
706
do {
707
ret = fclose(conffp);
708
} while(ret == EOF and errno == EINTR);
709
if(ret == EOF){
710
error(0, errno, "fclose");
711
exitstatus = EX_IOERR;
712
goto fallback;
713
}
714
614
free(org_line);
715
615
} else {
716
616
/* Check for harmful errors and go to fallback. Other errors might
717
617
not affect opening plugins */
718
618
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
719
error(0, errno, "fopen");
720
exitstatus = EX_OSERR;
619
perror("fopen");
620
exitstatus = EXIT_FAILURE;
721
621
goto fallback;
722
622
}
723
623
}
724
/* If there were any arguments from the configuration file, pass
725
them to parser as command line arguments */
624
/* If there was any arguments from configuration file,
625
pass them to parser as command arguments */
726
626
if(custom_argv != NULL){
727
ret = argp_parse(&argp, custom_argc, custom_argv,
728
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
729
NULL, NULL);
730
switch(ret){
731
case 0:
732
break;
733
case ENOMEM:
734
default:
735
errno = ret;
736
error(0, errno, "argp_parse");
737
exitstatus = EX_OSERR;
738
goto fallback;
739
case EINVAL:
740
exitstatus = EX_CONFIG;
627
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
628
0, NULL);
629
if(ret == ARGP_ERR_UNKNOWN){
630
fprintf(stderr, "Unknown error while parsing arguments\n");
631
exitstatus = EXIT_FAILURE;
741
632
goto fallback;
742
633
}
743
634
}
744
635
745
636
/* Parse actual command line arguments, to let them override the
746
637
config file */
747
ret = argp_parse(&argp, argc, argv,
748
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
749
NULL, NULL);
750
switch(ret){
751
case 0:
752
break;
753
case ENOMEM:
754
default:
755
errno = ret;
756
error(0, errno, "argp_parse");
757
exitstatus = EX_OSERR;
758
goto fallback;
759
case EINVAL:
760
exitstatus = EX_USAGE;
638
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
639
if(ret == ARGP_ERR_UNKNOWN){
640
fprintf(stderr, "Unknown error while parsing arguments\n");
641
exitstatus = EXIT_FAILURE;
761
642
goto fallback;
762
643
}
763
644
775
656
}
776
657
}
777
658
778
if(getuid() == 0){
779
/* Work around Debian bug #633582:
780
<http://bugs.debian.org/633582> */
781
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
782
if(plugindir_fd == -1){
783
if(errno != ENOENT){
784
error(0, errno, "open(\"" PDIR "\")");
785
}
786
} else {
787
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
788
if(ret == -1){
789
error(0, errno, "fstat");
790
} else {
791
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
792
ret = fchown(plugindir_fd, uid, gid);
793
if(ret == -1){
794
error(0, errno, "fchown");
795
}
796
}
797
}
798
TEMP_FAILURE_RETRY(close(plugindir_fd));
799
}
800
}
801
802
/* Lower permissions */
803
ret = setgid(gid);
659
/* Strip permissions down to nobody */
660
setgid(gid);
804
661
if(ret == -1){
805
error(0, errno, "setgid");
662
perror("setgid");
806
663
}
807
664
ret = setuid(uid);
808
665
if(ret == -1){
809
error(0, errno, "setuid");
810
}
811
812
/* Open plugin directory with close_on_exec flag */
666
perror("setuid");
667
}
668
669
if(plugindir == NULL){
670
dir = opendir(PDIR);
671
} else {
672
dir = opendir(plugindir);
673
}
674
675
if(dir == NULL){
676
perror("Could not open plugin dir");
677
exitstatus = EXIT_FAILURE;
678
goto fallback;
679
}
680
681
/* Set the FD_CLOEXEC flag on the directory, if possible */
813
682
{
814
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
815
#ifdef O_CLOEXEC
816
O_CLOEXEC
817
#else /* not O_CLOEXEC */
818
0
819
#endif /* not O_CLOEXEC */
820
);
821
if(dir_fd == -1){
822
error(0, errno, "Could not open plugin dir");
823
exitstatus = EX_UNAVAILABLE;
824
goto fallback;
825
}
826
827
#ifndef O_CLOEXEC
828
/* Set the FD_CLOEXEC flag on the directory */
829
ret = set_cloexec_flag(dir_fd);
830
if(ret < 0){
831
error(0, errno, "set_cloexec_flag");
832
exitstatus = EX_OSERR;
833
goto fallback;
834
}
835
#endif /* O_CLOEXEC */
836
}
837
838
int good_name(const struct dirent * const dirent){
839
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
840
"*.dpkg-old", "*.dpkg-bak",
841
"*.dpkg-divert", NULL };
842
#ifdef __GNUC__
843
#pragma GCC diagnostic push
844
#pragma GCC diagnostic ignored "-Wcast-qual"
845
#endif
846
for(const char **pat = (const char **)patterns;
847
*pat != NULL; pat++){
848
#ifdef __GNUC__
849
#pragma GCC diagnostic pop
850
#endif
851
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
852
!= FNM_NOMATCH){
853
if(debug){
854
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
855
" matching pattern %s\n", dirent->d_name, *pat);
856
}
857
return 0;
683
int dir_fd = dirfd(dir);
684
if(dir_fd >= 0){
685
ret = set_cloexec_flag(dir_fd);
686
if(ret < 0){
687
perror("set_cloexec_flag");
688
exitstatus = EXIT_FAILURE;
689
goto fallback;
858
690
}
859
691
}
860
return 1;
861
}
862
863
#ifdef __GLIBC__
864
#if __GLIBC_PREREQ(2, 15)
865
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
866
alphasort);
867
#else /* not __GLIBC_PREREQ(2, 15) */
868
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
869
&direntries, good_name, alphasort);
870
#endif /* not __GLIBC_PREREQ(2, 15) */
871
#else /* not __GLIBC__ */
872
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
873
&direntries, good_name, alphasort);
874
#endif /* not __GLIBC__ */
875
if(numplugins == -1){
876
error(0, errno, "Could not scan plugin dir");
877
direntries = NULL;
878
exitstatus = EX_OSERR;
879
goto fallback;
880
692
}
881
693
882
694
FD_ZERO(&rfds_all);
883
695
884
696
/* Read and execute any executable in the plugin directory*/
885
for(int i = 0; i < numplugins; i++){
886
887
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
888
if(plugin_fd == -1){
889
error(0, errno, "Could not open plugin");
697
while(true){
698
dirst = readdir(dir);
699
700
/* All directory entries have been processed */
701
if(dirst == NULL){
702
if(errno == EBADF){
703
perror("readdir");
704
exitstatus = EXIT_FAILURE;
705
goto fallback;
706
}
707
break;
708
}
709
710
d_name_len = strlen(dirst->d_name);
711
712
/* Ignore dotfiles, backup files and other junk */
713
{
714
bool bad_name = false;
715
716
const char const *bad_prefixes[] = { ".", "#", NULL };
717
718
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
719
".dpkg-old",
720
".dpkg-bak",
721
".dpkg-divert", NULL };
722
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
723
size_t pre_len = strlen(*pre);
724
if((d_name_len >= pre_len)
725
and strncmp((dirst->d_name), *pre, pre_len) == 0){
726
if(debug){
727
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
728
" with bad prefix %s\n", dirst->d_name, *pre);
729
}
730
bad_name = true;
731
break;
732
}
733
}
734
if(bad_name){
735
continue;
736
}
737
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
738
size_t suf_len = strlen(*suf);
739
if((d_name_len >= suf_len)
740
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
741
== 0)){
742
if(debug){
743
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
744
" with bad suffix %s\n", dirst->d_name, *suf);
745
}
746
bad_name = true;
747
break;
748
}
749
}
750
751
if(bad_name){
752
continue;
753
}
754
}
755
756
char *filename;
757
if(plugindir == NULL){
758
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
759
} else {
760
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
761
}
762
if(ret < 0){
763
perror("asprintf");
890
764
continue;
891
765
}
892
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
766
767
ret = stat(filename, &st);
893
768
if(ret == -1){
894
error(0, errno, "stat");
895
TEMP_FAILURE_RETRY(close(plugin_fd));
769
perror("stat");
770
free(filename);
896
771
continue;
897
772
}
898
773
899
774
/* Ignore non-executable files */
900
if(not S_ISREG(st.st_mode)
901
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
902
X_OK, 0)) != 0)){
775
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
903
776
if(debug){
904
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
905
" with bad type or mode\n",
906
plugindir != NULL ? plugindir : PDIR,
907
direntries[i]->d_name);
777
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
778
" with bad type or mode\n", filename);
908
779
}
909
TEMP_FAILURE_RETRY(close(plugin_fd));
780
free(filename);
910
781
continue;
911
782
}
912
783
913
plugin *p = getplugin(direntries[i]->d_name);
784
plugin *p = getplugin(dirst->d_name);
914
785
if(p == NULL){
915
error(0, errno, "getplugin");
916
TEMP_FAILURE_RETRY(close(plugin_fd));
786
perror("getplugin");
787
free(filename);
917
788
continue;
918
789
}
919
790
if(p->disabled){
920
791
if(debug){
921
792
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
922
direntries[i]->d_name);
793
dirst->d_name);
923
794
}
924
TEMP_FAILURE_RETRY(close(plugin_fd));
795
free(filename);
925
796
continue;
926
797
}
927
798
{
930
801
if(g != NULL){
931
802
for(char **a = g->argv + 1; *a != NULL; a++){
932
803
if(not add_argument(p, *a)){
933
error(0, errno, "add_argument");
804
perror("add_argument");
934
805
}
935
806
}
936
807
/* Add global environment variables */
937
808
for(char **e = g->environ; *e != NULL; e++){
938
809
if(not add_environment(p, *e, false)){
939
error(0, errno, "add_environment");
810
perror("add_environment");
940
811
}
941
812
}
942
813
}
943
814
}
944
/* If this plugin has any environment variables, we need to
945
duplicate the environment from this process, too. */
815
/* If this plugin has any environment variables, we will call
816
using execve and need to duplicate the environment from this
817
process, too. */
946
818
if(p->environ[0] != NULL){
947
819
for(char **e = environ; *e != NULL; e++){
948
820
if(not add_environment(p, *e, false)){
949
error(0, errno, "add_environment");
821
perror("add_environment");
950
822
}
951
823
}
952
824
}
953
825
954
826
int pipefd[2];
955
#ifndef O_CLOEXEC
956
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
957
#else /* O_CLOEXEC */
958
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
959
#endif /* O_CLOEXEC */
827
ret = pipe(pipefd);
960
828
if(ret == -1){
961
error(0, errno, "pipe");
962
exitstatus = EX_OSERR;
963
goto fallback;
964
}
965
if(pipefd[0] >= FD_SETSIZE){
966
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
967
FD_SETSIZE);
968
TEMP_FAILURE_RETRY(close(pipefd[0]));
969
TEMP_FAILURE_RETRY(close(pipefd[1]));
970
exitstatus = EX_OSERR;
971
goto fallback;
972
}
973
#ifndef O_CLOEXEC
829
perror("pipe");
830
exitstatus = EXIT_FAILURE;
831
goto fallback;
832
}
974
833
/* Ask OS to automatic close the pipe on exec */
975
834
ret = set_cloexec_flag(pipefd[0]);
976
835
if(ret < 0){
977
error(0, errno, "set_cloexec_flag");
978
TEMP_FAILURE_RETRY(close(pipefd[0]));
979
TEMP_FAILURE_RETRY(close(pipefd[1]));
980
exitstatus = EX_OSERR;
836
perror("set_cloexec_flag");
837
exitstatus = EXIT_FAILURE;
981
838
goto fallback;
982
839
}
983
840
ret = set_cloexec_flag(pipefd[1]);
984
841
if(ret < 0){
985
error(0, errno, "set_cloexec_flag");
986
TEMP_FAILURE_RETRY(close(pipefd[0]));
987
TEMP_FAILURE_RETRY(close(pipefd[1]));
988
exitstatus = EX_OSERR;
842
perror("set_cloexec_flag");
843
exitstatus = EXIT_FAILURE;
989
844
goto fallback;
990
845
}
991
#endif /* not O_CLOEXEC */
992
846
/* Block SIGCHLD until process is safely in process list */
993
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
994
&sigchld_action.sa_mask,
995
NULL));
847
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
996
848
if(ret < 0){
997
error(0, errno, "sigprocmask");
998
exitstatus = EX_OSERR;
849
perror("sigprocmask");
850
exitstatus = EXIT_FAILURE;
999
851
goto fallback;
1000
852
}
1001
853
/* Starting a new process to be watched */
1002
pid_t pid;
1003
do {
1004
pid = fork();
1005
} while(pid == -1 and errno == EINTR);
854
pid_t pid = fork();
1006
855
if(pid == -1){
1007
error(0, errno, "fork");
1008
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1009
&sigchld_action.sa_mask, NULL));
1010
TEMP_FAILURE_RETRY(close(pipefd[0]));
1011
TEMP_FAILURE_RETRY(close(pipefd[1]));
1012
exitstatus = EX_OSERR;
856
perror("fork");
857
exitstatus = EXIT_FAILURE;
1013
858
goto fallback;
1014
859
}
1015
860
if(pid == 0){
1016
861
/* this is the child process */
1017
862
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1018
863
if(ret < 0){
1019
error(0, errno, "sigaction");
1020
_exit(EX_OSERR);
864
perror("sigaction");
865
_exit(EXIT_FAILURE);
1021
866
}
1022
867
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1023
868
if(ret < 0){
1024
error(0, errno, "sigprocmask");
1025
_exit(EX_OSERR);
869
perror("sigprocmask");
870
_exit(EXIT_FAILURE);
1026
871
}
1027
872
1028
873
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1029
874
if(ret == -1){
1030
error(0, errno, "dup2");
1031
_exit(EX_OSERR);
875
perror("dup2");
876
_exit(EXIT_FAILURE);
1032
877
}
1033
878
1034
if(fexecve(plugin_fd, p->argv,
1035
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1036
error(0, errno, "fexecve for %s/%s",
1037
plugindir != NULL ? plugindir : PDIR,
1038
direntries[i]->d_name);
1039
_exit(EX_OSERR);
879
if(dirfd(dir) < 0){
880
/* If dir has no file descriptor, we could not set FD_CLOEXEC
881
above and must now close it manually here. */
882
closedir(dir);
883
}
884
if(p->environ[0] == NULL){
885
if(execv(filename, p->argv) < 0){
886
perror("execv");
887
_exit(EXIT_FAILURE);
888
}
889
} else {
890
if(execve(filename, p->argv, p->environ) < 0){
891
perror("execve");
892
_exit(EXIT_FAILURE);
893
}
1040
894
}
1041
895
/* no return */
1042
896
}
1043
897
/* Parent process */
1044
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1045
pipe */
1046
TEMP_FAILURE_RETRY(close(plugin_fd));
1047
plugin *new_plugin = getplugin(direntries[i]->d_name);
898
close(pipefd[1]); /* Close unused write end of pipe */
899
free(filename);
900
plugin *new_plugin = getplugin(dirst->d_name);
1048
901
if(new_plugin == NULL){
1049
error(0, errno, "getplugin");
1050
ret = (int)(TEMP_FAILURE_RETRY
1051
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1052
NULL)));
902
perror("getplugin");
903
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1053
904
if(ret < 0){
1054
error(0, errno, "sigprocmask");
905
perror("sigprocmask");
1055
906
}
1056
exitstatus = EX_OSERR;
907
exitstatus = EXIT_FAILURE;
1057
908
goto fallback;
1058
909
}
1059
910
1062
913
1063
914
/* Unblock SIGCHLD so signal handler can be run if this process
1064
915
has already completed */
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1066
&sigchld_action.sa_mask,
1067
NULL));
916
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1068
917
if(ret < 0){
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
918
perror("sigprocmask");
919
exitstatus = EXIT_FAILURE;
1071
920
goto fallback;
1072
921
}
1073
922
1074
#if defined (__GNUC__) and defined (__GLIBC__)
1075
#if not __GLIBC_PREREQ(2, 16)
1076
#pragma GCC diagnostic push
1077
#pragma GCC diagnostic ignored "-Wsign-conversion"
1078
#endif
1079
#endif
1080
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1081
-Wconversion in GNU libc
1082
before 2.16 */
1083
#if defined (__GNUC__) and defined (__GLIBC__)
1084
#if not __GLIBC_PREREQ(2, 16)
1085
#pragma GCC diagnostic pop
1086
#endif
1087
#endif
923
FD_SET(new_plugin->fd, &rfds_all);
1088
924
1089
925
if(maxfd < new_plugin->fd){
1090
926
maxfd = new_plugin->fd;
1091
927
}
1092
928
}
1093
929
1094
free(direntries);
1095
direntries = NULL;
1096
TEMP_FAILURE_RETRY(close(dir_fd));
1097
dir_fd = -1;
930
closedir(dir);
931
dir = NULL;
1098
932
free_plugin(getplugin(NULL));
1099
933
1100
934
for(plugin *p = plugin_list; p != NULL; p = p->next){
1112
946
while(plugin_list){
1113
947
fd_set rfds = rfds_all;
1114
948
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1115
if(select_ret == -1 and errno != EINTR){
1116
error(0, errno, "select");
1117
exitstatus = EX_OSERR;
949
if(select_ret == -1){
950
perror("select");
951
exitstatus = EXIT_FAILURE;
1118
952
goto fallback;
1119
953
}
1120
954
/* OK, now either a process completed, or something can be read
1126
960
if(not WIFEXITED(proc->status)
1127
961
or WEXITSTATUS(proc->status) != 0){
1128
962
/* Bad exit by plugin */
1129
963
1130
964
if(debug){
1131
965
if(WIFEXITED(proc->status)){
1132
966
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1135
969
WEXITSTATUS(proc->status));
1136
970
} else if(WIFSIGNALED(proc->status)){
1137
971
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1138
" signal %d: %s\n", proc->name,
972
" signal %d\n", proc->name,
1139
973
(intmax_t) (proc->pid),
1140
WTERMSIG(proc->status),
1141
strsignal(WTERMSIG(proc->status)));
974
WTERMSIG(proc->status));
1142
975
} else if(WCOREDUMP(proc->status)){
1143
976
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1144
977
" core\n", proc->name, (intmax_t) (proc->pid));
1146
979
}
1147
980
1148
981
/* Remove the plugin */
1149
#if defined (__GNUC__) and defined (__GLIBC__)
1150
#if not __GLIBC_PREREQ(2, 16)
1151
#pragma GCC diagnostic push
1152
#pragma GCC diagnostic ignored "-Wsign-conversion"
1153
#endif
1154
#endif
1155
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1156
-Wconversion in GNU libc
1157
before 2.16 */
1158
#if defined (__GNUC__) and defined (__GLIBC__)
1159
#if not __GLIBC_PREREQ(2, 16)
1160
#pragma GCC diagnostic pop
1161
#endif
1162
#endif
1163
982
FD_CLR(proc->fd, &rfds_all);
983
1164
984
/* Block signal while modifying process_list */
1165
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1166
(SIG_BLOCK,
1167
&sigchld_action.sa_mask,
1168
NULL));
985
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1169
986
if(ret < 0){
1170
error(0, errno, "sigprocmask");
1171
exitstatus = EX_OSERR;
987
perror("sigprocmask");
988
exitstatus = EXIT_FAILURE;
1172
989
goto fallback;
1173
990
}
1174
991
1177
994
proc = next_plugin;
1178
995
1179
996
/* We are done modifying process list, so unblock signal */
1180
ret = (int)(TEMP_FAILURE_RETRY
1181
(sigprocmask(SIG_UNBLOCK,
1182
&sigchld_action.sa_mask, NULL)));
997
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
998
NULL);
1183
999
if(ret < 0){
1184
error(0, errno, "sigprocmask");
1185
exitstatus = EX_OSERR;
1000
perror("sigprocmask");
1001
exitstatus = EXIT_FAILURE;
1186
1002
goto fallback;
1187
1003
}
1188
1004
1198
1014
bool bret = print_out_password(proc->buffer,
1199
1015
proc->buffer_length);
1200
1016
if(not bret){
1201
error(0, errno, "print_out_password");
1202
exitstatus = EX_IOERR;
1017
perror("print_out_password");
1018
exitstatus = EXIT_FAILURE;
1203
1019
}
1204
1020
goto fallback;
1205
1021
}
1206
1022
1207
1023
/* This process has not completed. Does it have any output? */
1208
#if defined (__GNUC__) and defined (__GLIBC__)
1209
#if not __GLIBC_PREREQ(2, 16)
1210
#pragma GCC diagnostic push
1211
#pragma GCC diagnostic ignored "-Wsign-conversion"
1212
#endif
1213
#endif
1214
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1215
warning from
1216
-Wconversion
1217
in GNU libc
1218
before
1219
2.16 */
1220
#if defined (__GNUC__) and defined (__GLIBC__)
1221
#if not __GLIBC_PREREQ(2, 16)
1222
#pragma GCC diagnostic pop
1223
#endif
1224
#endif
1024
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1225
1025
/* This process had nothing to say at this time */
1226
1026
proc = proc->next;
1227
1027
continue;
1228
1028
}
1229
1029
/* Before reading, make the process' data buffer large enough */
1230
1030
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1231
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1232
+ (size_t) BUFFER_SIZE);
1233
if(new_buffer == NULL){
1234
error(0, errno, "malloc");
1235
exitstatus = EX_OSERR;
1031
proc->buffer = realloc(proc->buffer, proc->buffer_size
1032
+ (size_t) BUFFER_SIZE);
1033
if(proc->buffer == NULL){
1034
perror("malloc");
1035
exitstatus = EXIT_FAILURE;
1236
1036
goto fallback;
1237
1037
}
1238
proc->buffer = new_buffer;
1239
1038
proc->buffer_size += BUFFER_SIZE;
1240
1039
}
1241
1040
/* Read from the process */
1242
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1243
proc->buffer
1244
+ proc->buffer_length,
1245
BUFFER_SIZE));
1041
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1042
BUFFER_SIZE);
1246
1043
if(sret < 0){
1247
1044
/* Read error from this process; ignore the error */
1248
1045
proc = proc->next;
1256
1053
}
1257
1054
}
1258
1055
}
1259
1260
1056
1057
1261
1058
fallback:
1262
1059
1263
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1264
and exitstatus != EX_OK)){
1060
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1265
1061
/* Fallback if all plugins failed, none are found or an error
1266
1062
occured */
1267
1063
bool bret;
1275
1071
}
1276
1072
bret = print_out_password(passwordbuffer, len);
1277
1073
if(not bret){
1278
error(0, errno, "print_out_password");
1279
exitstatus = EX_IOERR;
1074
perror("print_out_password");
1075
exitstatus = EXIT_FAILURE;
1280
1076
}
1281
1077
}
1282
1078
1283
1079
/* Restore old signal handler */
1284
1080
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1285
1081
if(ret == -1){
1286
error(0, errno, "sigaction");
1287
exitstatus = EX_OSERR;
1082
perror("sigaction");
1083
exitstatus = EXIT_FAILURE;
1288
1084
}
1289
1085
1290
1086
if(custom_argv != NULL){
1294
1090
free(custom_argv);
1295
1091
}
1296
1092
1297
free(direntries);
1298
1299
if(dir_fd != -1){
1300
TEMP_FAILURE_RETRY(close(dir_fd));
1093
if(dir != NULL){
1094
closedir(dir);
1301
1095
}
1302
1096
1303
1097
/* Kill the processes */
1307
1101
ret = kill(p->pid, SIGTERM);
1308
1102
if(ret == -1 and errno != ESRCH){
1309
1103
/* Set-uid proccesses might not get closed */
1310
error(0, errno, "kill");
1104
perror("kill");
1311
1105
}
1312
1106
}
1313
1107
}
1314
1108
1315
1109
/* Wait for any remaining child processes to terminate */
1316
do {
1110
do{
1317
1111
ret = wait(NULL);
1318
1112
} while(ret >= 0);
1319
1113
if(errno != ECHILD){
1320
error(0, errno, "wait");
1114
perror("wait");
1321
1115
}
1322
1116
1323
1117
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0