To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 237.2.29
- compare with another revision
- download diff
- download tarball
- view history from revision 237.2.29
- Committer: Teddy Hogeborn
- Date: 2009-01-13 04:35:19 UTC
- mto: (24.1.123 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 245.
- Revision ID: teddy@fukt.bsnet.se-20090113043519-0yr39snphoegq8l1
* plugin-runner.c: Only space changes.
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/password-prompt.c: - '' -
- files removed:
- DBUS-API
- debian/source
- network-hooks.d
- files renamed:
- mandos-ctl => mandos-list
- 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 © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 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
asprintf(), O_CLOEXEC */
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(),
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), 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(), WTERMSIG(),
42
WCOREDUMP() */
41
WEXITSTATUS() */
43
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
45
readdir(), closedir(), dirfd() */
47
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
47
fcntl(), setuid(), setgid(),
53
52
close() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
54
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
#include <string.h> /* strsep, strlen(), asprintf() */
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
64
62
#include <signal.h> /* struct sigaction, sigemptyset(),
65
63
sigaddset(), sigaction(),
66
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
SIG_UNBLOCK, kill() */
69
66
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
75
67
76
68
#define BUFFER_SIZE 256
77
69
79
71
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
72
81
73
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
75
84
76
typedef struct plugin{
85
77
char *name; /* can be NULL or any plugin name */
88
80
char **environ;
89
81
int envc;
90
82
bool disabled;
91
83
92
84
/* Variables used for running processes*/
93
85
pid_t pid;
94
86
int fd;
96
88
size_t buffer_size;
97
89
size_t buffer_length;
98
90
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
91
volatile bool completed;
92
volatile int status;
101
93
struct plugin *next;
102
94
} plugin;
103
95
105
97
106
98
/* Gets an existing plugin based on name,
107
99
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
100
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
101
/* Check for exiting plugin with that name */
111
102
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
103
if((p->name == name)
113
104
or (p->name and name and (strcmp(p->name, name) == 0))){
115
106
}
116
107
}
117
108
/* 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);
109
plugin *new_plugin = malloc(sizeof(plugin));
122
110
if(new_plugin == NULL){
123
111
return NULL;
124
112
}
125
113
char *copy_name = NULL;
126
114
if(name != NULL){
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
115
copy_name = strdup(name);
130
116
if(copy_name == NULL){
131
int e = errno;
132
free(new_plugin);
133
errno = e;
134
117
return NULL;
135
118
}
136
119
}
137
120
138
*new_plugin = (plugin){ .name = copy_name,
139
.argc = 1,
140
.disabled = false,
141
.next = plugin_list };
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
142
125
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
126
new_plugin->argv = malloc(sizeof(char *) * 2);
146
127
if(new_plugin->argv == NULL){
147
int e = errno;
148
128
free(copy_name);
149
129
free(new_plugin);
150
errno = e;
151
130
return NULL;
152
131
}
153
132
new_plugin->argv[0] = copy_name;
154
133
new_plugin->argv[1] = NULL;
155
134
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
135
new_plugin->environ = malloc(sizeof(char *));
159
136
if(new_plugin->environ == NULL){
160
int e = errno;
161
137
free(copy_name);
162
138
free(new_plugin->argv);
163
139
free(new_plugin);
164
errno = e;
165
140
return NULL;
166
141
}
167
142
new_plugin->environ[0] = NULL;
172
147
}
173
148
174
149
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
150
static bool add_to_char_array(const char *new, char ***array,
177
151
int *len){
178
152
/* 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);
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
184
155
/* Malloc check */
185
if(new_array == NULL){
156
if(*array == NULL){
186
157
return false;
187
158
}
188
*array = new_array;
189
159
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
160
char *copy = strdup(new);
194
161
if(copy == NULL){
195
162
return false;
196
163
}
203
170
}
204
171
205
172
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
173
static bool add_argument(plugin *p, const char *arg){
208
174
if(p == NULL){
209
175
return false;
212
178
}
213
179
214
180
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
181
static bool add_environment(plugin *p, const char *def, bool replace){
217
182
if(p == NULL){
218
183
return false;
220
185
/* namelen = length of name of environment variable */
221
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
187
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
225
190
/* It already exists */
226
191
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){
192
char *new = realloc(*e, strlen(def) + 1);
193
if(new == NULL){
232
194
return false;
233
195
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
196
*e = new;
197
strcpy(*e, def);
236
198
}
237
199
return true;
238
200
}
243
205
/*
244
206
* Based on the example in the GNU LibC manual chapter 13.13 "File
245
207
* Descriptor Flags".
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
247
209
*/
248
__attribute__((warn_unused_result))
249
210
static int set_cloexec_flag(int fd){
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
int ret = fcntl(fd, F_GETFD, 0);
251
212
/* If reading the flags failed, return error indication now. */
252
213
if(ret < 0){
253
214
return ret;
254
215
}
255
216
/* Store modified flag word in the descriptor. */
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
257
ret | FD_CLOEXEC));
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
218
}
259
219
260
220
261
221
/* Mark processes as completed when they exit, and save their exit
262
222
status. */
263
223
static void handle_sigchld(__attribute__((unused)) int sig){
264
int old_errno = errno;
265
224
while(true){
266
225
plugin *proc = plugin_list;
267
226
int status;
271
230
break;
272
231
}
273
232
if(pid == -1){
274
if(errno == ECHILD){
275
/* No child processes */
276
break;
233
if(errno != ECHILD){
234
perror("waitpid");
277
235
}
278
error(0, errno, "waitpid");
236
/* No child processes */
237
break;
279
238
}
280
239
281
240
/* A child exited, find it in process_list */
287
246
continue;
288
247
}
289
248
proc->status = status;
290
proc->completed = 1;
249
proc->completed = true;
291
250
}
292
errno = old_errno;
293
251
}
294
252
295
253
/* Prints out a password to stdout */
296
__attribute__((nonnull, warn_unused_result))
297
254
static bool print_out_password(const char *buffer, size_t length){
298
255
ssize_t ret;
299
256
for(size_t written = 0; written < length; written += (size_t)ret){
307
264
}
308
265
309
266
/* Removes and free a plugin from the plugin list */
310
__attribute__((nonnull))
311
267
static void free_plugin(plugin *plugin_node){
312
268
313
269
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
319
275
}
320
276
free(plugin_node->environ);
321
277
free(plugin_node->buffer);
322
278
323
279
/* Removes the plugin from the singly-linked list */
324
280
if(plugin_node == plugin_list){
325
281
/* First one - simple */
368
324
sigemptyset(&sigchld_action.sa_mask);
369
325
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
370
326
if(ret == -1){
371
error(0, errno, "sigaddset");
372
exitstatus = EX_OSERR;
327
perror("sigaddset");
328
exitstatus = EXIT_FAILURE;
373
329
goto fallback;
374
330
}
375
331
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
376
332
if(ret == -1){
377
error(0, errno, "sigaction");
378
exitstatus = EX_OSERR;
333
perror("sigaction");
334
exitstatus = EXIT_FAILURE;
379
335
goto fallback;
380
336
}
381
337
413
369
.doc = "Group ID the plugins will run as", .group = 3 },
414
370
{ .name = "debug", .key = 132,
415
371
.doc = "Debug mode", .group = 4 },
416
/*
417
* These reproduce what we would get without ARGP_NO_HELP
418
*/
419
{ .name = "help", .key = '?',
420
.doc = "Give this help list", .group = -1 },
421
{ .name = "usage", .key = -3,
422
.doc = "Give a short usage message", .group = -1 },
423
{ .name = "version", .key = 'V',
424
.doc = "Print program version", .group = -1 },
425
372
{ .name = NULL }
426
373
};
427
374
428
__attribute__((nonnull(3)))
429
error_t parse_opt(int key, char *arg, struct argp_state *state){
430
errno = 0;
431
switch(key){
432
char *tmp;
433
intmax_t tmp_id;
375
error_t parse_opt(int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
377
switch(key) {
434
378
case 'g': /* --global-options */
435
{
436
char *plugin_option;
437
while((plugin_option = strsep(&arg, ",")) != NULL){
438
if(not add_argument(getplugin(NULL), plugin_option)){
439
break;
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;
440
388
}
441
389
}
442
errno = 0;
443
390
}
444
391
break;
445
392
case 'G': /* --global-env */
446
if(add_environment(getplugin(NULL), arg, true)){
447
errno = 0;
393
if(arg == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
448
398
}
449
399
break;
450
400
case 'o': /* --options-for */
451
{
452
char *option_list = strchr(arg, ':');
453
if(option_list == NULL){
454
argp_error(state, "No colon in \"%s\"", arg);
455
errno = EINVAL;
456
break;
457
}
458
*option_list = '\0';
459
option_list++;
460
if(arg[0] == '\0'){
461
argp_error(state, "Empty plugin name");
462
errno = EINVAL;
463
break;
464
}
465
char *option;
466
while((option = strsep(&option_list, ",")) != NULL){
467
if(not add_argument(getplugin(arg), option)){
468
break;
469
}
470
}
471
errno = 0;
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
}
472
420
}
473
421
break;
474
422
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
475
426
{
476
427
char *envdef = strchr(arg, ':');
477
428
if(envdef == NULL){
478
argp_error(state, "No colon in \"%s\"", arg);
479
errno = EINVAL;
480
429
break;
481
430
}
482
431
*envdef = '\0';
483
envdef++;
484
if(arg[0] == '\0'){
485
argp_error(state, "Empty plugin name");
486
errno = EINVAL;
487
break;
488
}
489
if(add_environment(getplugin(arg), envdef, true)){
490
errno = 0;
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
491
434
}
492
435
}
493
436
break;
494
437
case 'd': /* --disable */
495
{
438
if(arg != NULL){
496
439
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = true;
499
errno = 0;
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
500
442
}
443
p->disabled = true;
501
444
}
502
445
break;
503
446
case 'e': /* --enable */
504
{
447
if(arg != NULL){
505
448
plugin *p = getplugin(arg);
506
if(p != NULL){
507
p->disabled = false;
508
errno = 0;
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
509
451
}
452
p->disabled = false;
510
453
}
511
454
break;
512
455
case 128: /* --plugin-dir */
513
456
free(plugindir);
514
457
plugindir = strdup(arg);
515
if(plugindir != NULL){
516
errno = 0;
517
}
458
if(plugindir == NULL){
459
perror("strdup");
460
}
518
461
break;
519
462
case 129: /* --config-file */
520
463
/* This is already done by parse_opt_config_file() */
521
464
break;
522
465
case 130: /* --userid */
523
tmp_id = strtoimax(arg, &tmp, 10);
524
if(errno != 0 or tmp == arg or *tmp != '\0'
525
or tmp_id != (uid_t)tmp_id){
526
argp_error(state, "Bad user ID number: \"%s\", using %"
527
PRIdMAX, arg, (intmax_t)uid);
528
break;
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);
529
471
}
530
uid = (uid_t)tmp_id;
531
errno = 0;
532
472
break;
533
473
case 131: /* --groupid */
534
tmp_id = strtoimax(arg, &tmp, 10);
535
if(errno != 0 or tmp == arg or *tmp != '\0'
536
or tmp_id != (gid_t)tmp_id){
537
argp_error(state, "Bad group ID number: \"%s\", using %"
538
PRIdMAX, arg, (intmax_t)gid);
539
break;
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);
540
479
}
541
gid = (gid_t)tmp_id;
542
errno = 0;
543
480
break;
544
481
case 132: /* --debug */
545
482
debug = true;
546
483
break;
547
/*
548
* These reproduce what we would get without ARGP_NO_HELP
549
*/
550
case '?': /* --help */
551
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
552
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
553
case -3: /* --usage */
554
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
555
argp_state_help(state, state->out_stream,
556
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
557
case 'V': /* --version */
558
fprintf(state->out_stream, "%s\n", argp_program_version);
559
exit(EXIT_SUCCESS);
560
break;
561
484
/*
562
485
* When adding more options before this line, remember to also add a
563
486
* "case" to the "parse_opt_config_file" function below.
566
489
/* Cryptsetup always passes an argument, which is an empty
567
490
string if "none" was specified in /etc/crypttab. So if
568
491
argument was empty, we ignore it silently. */
569
if(arg[0] == '\0'){
570
break;
492
if(arg[0] != '\0'){
493
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
571
494
}
495
break;
496
case ARGP_KEY_END:
497
break;
572
498
default:
573
499
return ARGP_ERR_UNKNOWN;
574
500
}
575
return errno; /* Set to 0 at start */
501
return 0;
576
502
}
577
503
578
504
/* This option parser is the same as parse_opt() above, except it
579
505
ignores everything but the --config-file option. */
580
506
error_t parse_opt_config_file(int key, char *arg,
581
507
__attribute__((unused))
582
struct argp_state *state){
583
errno = 0;
584
switch(key){
508
struct argp_state *state) {
509
switch(key) {
585
510
case 'g': /* --global-options */
586
511
case 'G': /* --global-env */
587
512
case 'o': /* --options-for */
593
518
case 129: /* --config-file */
594
519
free(argfile);
595
520
argfile = strdup(arg);
596
if(argfile != NULL){
597
errno = 0;
521
if(argfile == NULL){
522
perror("strdup");
598
523
}
599
break;
524
break;
600
525
case 130: /* --userid */
601
526
case 131: /* --groupid */
602
527
case 132: /* --debug */
603
case '?': /* --help */
604
case -3: /* --usage */
605
case 'V': /* --version */
606
528
case ARGP_KEY_ARG:
529
case ARGP_KEY_END:
607
530
break;
608
531
default:
609
532
return ARGP_ERR_UNKNOWN;
610
533
}
611
return errno;
534
return 0;
612
535
}
613
536
614
537
struct argp argp = { .options = options,
618
541
619
542
/* Parse using parse_opt_config_file() in order to get the custom
620
543
config file location, if any. */
621
ret = argp_parse(&argp, argc, argv,
622
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
623
NULL, NULL);
624
switch(ret){
625
case 0:
626
break;
627
case ENOMEM:
628
default:
629
errno = ret;
630
error(0, errno, "argp_parse");
631
exitstatus = EX_OSERR;
632
goto fallback;
633
case EINVAL:
634
exitstatus = EX_USAGE;
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;
635
548
goto fallback;
636
549
}
637
550
643
556
conffp = fopen(AFILE, "r");
644
557
} else {
645
558
conffp = fopen(argfile, "r");
646
}
559
}
647
560
if(conffp != NULL){
648
561
char *org_line = NULL;
649
562
char *p, *arg, *new_arg, *line;
650
563
size_t size = 0;
651
564
const char whitespace_delims[] = " \r\t\f\v\n";
652
565
const char comment_delim[] = "#";
653
566
654
567
custom_argc = 1;
655
568
custom_argv = malloc(sizeof(char*) * 2);
656
569
if(custom_argv == NULL){
657
error(0, errno, "malloc");
658
exitstatus = EX_OSERR;
570
perror("malloc");
571
exitstatus = EXIT_FAILURE;
659
572
goto fallback;
660
573
}
661
574
custom_argv[0] = argv[0];
662
575
custom_argv[1] = NULL;
663
576
664
577
/* for each line in the config file, strip whitespace and ignore
665
578
commented text */
666
579
while(true){
668
581
if(sret == -1){
669
582
break;
670
583
}
671
584
672
585
line = org_line;
673
586
arg = strsep(&line, comment_delim);
674
587
while((p = strsep(&arg, whitespace_delims)) != NULL){
677
590
}
678
591
new_arg = strdup(p);
679
592
if(new_arg == NULL){
680
error(0, errno, "strdup");
681
exitstatus = EX_OSERR;
593
perror("strdup");
594
exitstatus = EXIT_FAILURE;
682
595
free(org_line);
683
596
goto fallback;
684
597
}
685
598
686
599
custom_argc += 1;
687
{
688
char **new_argv = realloc(custom_argv, sizeof(char *)
689
* ((unsigned int)
690
custom_argc + 1));
691
if(new_argv == NULL){
692
error(0, errno, "realloc");
693
exitstatus = EX_OSERR;
694
free(new_arg);
695
free(org_line);
696
goto fallback;
697
} else {
698
custom_argv = new_argv;
699
}
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;
700
607
}
701
608
custom_argv[custom_argc-1] = new_arg;
702
custom_argv[custom_argc] = NULL;
609
custom_argv[custom_argc] = NULL;
703
610
}
704
611
}
705
do {
706
ret = fclose(conffp);
707
} while(ret == EOF and errno == EINTR);
708
if(ret == EOF){
709
error(0, errno, "fclose");
710
exitstatus = EX_IOERR;
711
goto fallback;
712
}
713
612
free(org_line);
714
613
} else {
715
614
/* Check for harmful errors and go to fallback. Other errors might
716
615
not affect opening plugins */
717
616
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
617
perror("fopen");
618
exitstatus = EXIT_FAILURE;
720
619
goto fallback;
721
620
}
722
621
}
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
622
/* If there was any arguments from configuration file,
623
pass them to parser as command arguments */
725
624
if(custom_argv != NULL){
726
ret = argp_parse(&argp, custom_argc, custom_argv,
727
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
728
NULL, NULL);
729
switch(ret){
730
case 0:
731
break;
732
case ENOMEM:
733
default:
734
errno = ret;
735
error(0, errno, "argp_parse");
736
exitstatus = EX_OSERR;
737
goto fallback;
738
case EINVAL:
739
exitstatus = EX_CONFIG;
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
630
goto fallback;
741
631
}
742
632
}
743
633
744
634
/* Parse actual command line arguments, to let them override the
745
635
config file */
746
ret = argp_parse(&argp, argc, argv,
747
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
748
NULL, NULL);
749
switch(ret){
750
case 0:
751
break;
752
case ENOMEM:
753
default:
754
errno = ret;
755
error(0, errno, "argp_parse");
756
exitstatus = EX_OSERR;
757
goto fallback;
758
case EINVAL:
759
exitstatus = EX_USAGE;
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;
760
640
goto fallback;
761
641
}
762
642
767
647
for(char **a = p->argv; *a != NULL; a++){
768
648
fprintf(stderr, "\tArg: %s\n", *a);
769
649
}
770
fprintf(stderr, "...and %d environment variables\n", p->envc);
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
771
651
for(char **a = p->environ; *a != NULL; a++){
772
652
fprintf(stderr, "\t%s\n", *a);
773
653
}
774
654
}
775
655
}
776
656
777
if(getuid() == 0){
778
/* Work around Debian bug #633582:
779
<http://bugs.debian.org/633582> */
780
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
781
if(plugindir_fd == -1){
782
error(0, errno, "open");
783
} else {
784
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
785
if(ret == -1){
786
error(0, errno, "fstat");
787
} else {
788
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
789
ret = fchown(plugindir_fd, uid, gid);
790
if(ret == -1){
791
error(0, errno, "fchown");
792
}
793
}
794
}
795
TEMP_FAILURE_RETRY(close(plugindir_fd));
796
}
797
}
798
799
/* Lower permissions */
800
ret = setgid(gid);
801
if(ret == -1){
802
error(0, errno, "setgid");
803
}
657
/* Strip permissions down to nobody */
804
658
ret = setuid(uid);
805
659
if(ret == -1){
806
error(0, errno, "setuid");
807
}
808
809
/* Open plugin directory with close_on_exec flag */
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 */
810
680
{
811
int dir_fd = -1;
812
if(plugindir == NULL){
813
dir_fd = open(PDIR, O_RDONLY |
814
#ifdef O_CLOEXEC
815
O_CLOEXEC
816
#else /* not O_CLOEXEC */
817
0
818
#endif /* not O_CLOEXEC */
819
);
820
} else {
821
dir_fd = open(plugindir, O_RDONLY |
822
#ifdef O_CLOEXEC
823
O_CLOEXEC
824
#else /* not O_CLOEXEC */
825
0
826
#endif /* not O_CLOEXEC */
827
);
828
}
829
if(dir_fd == -1){
830
error(0, errno, "Could not open plugin dir");
831
exitstatus = EX_UNAVAILABLE;
832
goto fallback;
833
}
834
835
#ifndef O_CLOEXEC
836
/* Set the FD_CLOEXEC flag on the directory */
837
ret = set_cloexec_flag(dir_fd);
838
if(ret < 0){
839
error(0, errno, "set_cloexec_flag");
840
TEMP_FAILURE_RETRY(close(dir_fd));
841
exitstatus = EX_OSERR;
842
goto fallback;
843
}
844
#endif /* O_CLOEXEC */
845
846
dir = fdopendir(dir_fd);
847
if(dir == NULL){
848
error(0, errno, "Could not open plugin dir");
849
TEMP_FAILURE_RETRY(close(dir_fd));
850
exitstatus = EX_OSERR;
851
goto fallback;
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;
688
}
852
689
}
853
690
}
854
691
856
693
857
694
/* Read and execute any executable in the plugin directory*/
858
695
while(true){
859
do {
860
dirst = readdir(dir);
861
} while(dirst == NULL and errno == EINTR);
696
dirst = readdir(dir);
862
697
863
698
/* All directory entries have been processed */
864
699
if(dirst == NULL){
865
700
if(errno == EBADF){
866
error(0, errno, "readdir");
867
exitstatus = EX_IOERR;
701
perror("readdir");
702
exitstatus = EXIT_FAILURE;
868
703
goto fallback;
869
704
}
870
705
break;
876
711
{
877
712
bool bad_name = false;
878
713
879
const char * const bad_prefixes[] = { ".", "#", NULL };
714
const char const *bad_prefixes[] = { ".", "#", NULL };
880
715
881
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
716
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
882
717
".dpkg-old",
883
718
".dpkg-bak",
884
719
".dpkg-divert", NULL };
885
#ifdef __GNUC__
886
#pragma GCC diagnostic push
887
#pragma GCC diagnostic ignored "-Wcast-qual"
888
#endif
889
for(const char **pre = (const char **)bad_prefixes;
890
*pre != NULL; pre++){
891
#ifdef __GNUC__
892
#pragma GCC diagnostic pop
893
#endif
720
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
894
721
size_t pre_len = strlen(*pre);
895
722
if((d_name_len >= pre_len)
896
723
and strncmp((dirst->d_name), *pre, pre_len) == 0){
905
732
if(bad_name){
906
733
continue;
907
734
}
908
#ifdef __GNUC__
909
#pragma GCC diagnostic push
910
#pragma GCC diagnostic ignored "-Wcast-qual"
911
#endif
912
for(const char **suf = (const char **)bad_suffixes;
913
*suf != NULL; suf++){
914
#ifdef __GNUC__
915
#pragma GCC diagnostic pop
916
#endif
735
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
917
736
size_t suf_len = strlen(*suf);
918
737
if((d_name_len >= suf_len)
919
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
738
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
920
739
== 0)){
921
740
if(debug){
922
741
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
931
750
continue;
932
751
}
933
752
}
934
753
935
754
char *filename;
936
755
if(plugindir == NULL){
937
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
938
dirst->d_name));
756
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
939
757
} else {
940
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
941
plugindir,
942
dirst->d_name));
758
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
943
759
}
944
760
if(ret < 0){
945
error(0, errno, "asprintf");
761
perror("asprintf");
946
762
continue;
947
763
}
948
764
949
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
765
ret = stat(filename, &st);
950
766
if(ret == -1){
951
error(0, errno, "stat");
767
perror("stat");
952
768
free(filename);
953
769
continue;
954
770
}
955
771
956
772
/* Ignore non-executable files */
957
if(not S_ISREG(st.st_mode)
958
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
773
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
959
774
if(debug){
960
775
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
961
776
" with bad type or mode\n", filename);
966
781
967
782
plugin *p = getplugin(dirst->d_name);
968
783
if(p == NULL){
969
error(0, errno, "getplugin");
784
perror("getplugin");
970
785
free(filename);
971
786
continue;
972
787
}
984
799
if(g != NULL){
985
800
for(char **a = g->argv + 1; *a != NULL; a++){
986
801
if(not add_argument(p, *a)){
987
error(0, errno, "add_argument");
802
perror("add_argument");
988
803
}
989
804
}
990
805
/* Add global environment variables */
991
806
for(char **e = g->environ; *e != NULL; e++){
992
807
if(not add_environment(p, *e, false)){
993
error(0, errno, "add_environment");
808
perror("add_environment");
994
809
}
995
810
}
996
811
}
1001
816
if(p->environ[0] != NULL){
1002
817
for(char **e = environ; *e != NULL; e++){
1003
818
if(not add_environment(p, *e, false)){
1004
error(0, errno, "add_environment");
819
perror("add_environment");
1005
820
}
1006
821
}
1007
822
}
1008
823
1009
824
int pipefd[2];
1010
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
825
ret = pipe(pipefd);
1011
826
if(ret == -1){
1012
error(0, errno, "pipe");
1013
exitstatus = EX_OSERR;
827
perror("pipe");
828
exitstatus = EXIT_FAILURE;
1014
829
goto fallback;
1015
830
}
1016
831
/* Ask OS to automatic close the pipe on exec */
1017
832
ret = set_cloexec_flag(pipefd[0]);
1018
833
if(ret < 0){
1019
error(0, errno, "set_cloexec_flag");
1020
exitstatus = EX_OSERR;
834
perror("set_cloexec_flag");
835
exitstatus = EXIT_FAILURE;
1021
836
goto fallback;
1022
837
}
1023
838
ret = set_cloexec_flag(pipefd[1]);
1024
839
if(ret < 0){
1025
error(0, errno, "set_cloexec_flag");
1026
exitstatus = EX_OSERR;
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1027
842
goto fallback;
1028
843
}
1029
844
/* Block SIGCHLD until process is safely in process list */
1030
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1031
&sigchld_action.sa_mask,
1032
NULL));
845
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1033
846
if(ret < 0){
1034
error(0, errno, "sigprocmask");
1035
exitstatus = EX_OSERR;
847
perror("sigprocmask");
848
exitstatus = EXIT_FAILURE;
1036
849
goto fallback;
1037
850
}
1038
851
/* Starting a new process to be watched */
1039
pid_t pid;
1040
do {
1041
pid = fork();
1042
} while(pid == -1 and errno == EINTR);
852
pid_t pid = fork();
1043
853
if(pid == -1){
1044
error(0, errno, "fork");
1045
exitstatus = EX_OSERR;
854
perror("fork");
855
exitstatus = EXIT_FAILURE;
1046
856
goto fallback;
1047
857
}
1048
858
if(pid == 0){
1049
859
/* this is the child process */
1050
860
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1051
861
if(ret < 0){
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
862
perror("sigaction");
863
_exit(EXIT_FAILURE);
1054
864
}
1055
865
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1056
866
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
867
perror("sigprocmask");
868
_exit(EXIT_FAILURE);
1059
869
}
1060
870
1061
871
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1062
872
if(ret == -1){
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
873
perror("dup2");
874
_exit(EXIT_FAILURE);
1065
875
}
1066
876
1067
877
if(dirfd(dir) < 0){
1071
881
}
1072
882
if(p->environ[0] == NULL){
1073
883
if(execv(filename, p->argv) < 0){
1074
error(0, errno, "execv for %s", filename);
1075
_exit(EX_OSERR);
884
perror("execv");
885
_exit(EXIT_FAILURE);
1076
886
}
1077
887
} else {
1078
888
if(execve(filename, p->argv, p->environ) < 0){
1079
error(0, errno, "execve for %s", filename);
1080
_exit(EX_OSERR);
889
perror("execve");
890
_exit(EXIT_FAILURE);
1081
891
}
1082
892
}
1083
893
/* no return */
1084
894
}
1085
895
/* Parent process */
1086
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1087
pipe */
896
close(pipefd[1]); /* Close unused write end of pipe */
1088
897
free(filename);
1089
898
plugin *new_plugin = getplugin(dirst->d_name);
1090
899
if(new_plugin == NULL){
1091
error(0, errno, "getplugin");
1092
ret = (int)(TEMP_FAILURE_RETRY
1093
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1094
NULL)));
900
perror("getplugin");
901
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1095
902
if(ret < 0){
1096
error(0, errno, "sigprocmask");
903
perror("sigprocmask");
1097
904
}
1098
exitstatus = EX_OSERR;
905
exitstatus = EXIT_FAILURE;
1099
906
goto fallback;
1100
907
}
1101
908
1104
911
1105
912
/* Unblock SIGCHLD so signal handler can be run if this process
1106
913
has already completed */
1107
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1108
&sigchld_action.sa_mask,
1109
NULL));
914
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1110
915
if(ret < 0){
1111
error(0, errno, "sigprocmask");
1112
exitstatus = EX_OSERR;
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1113
918
goto fallback;
1114
919
}
1115
920
1116
#if defined (__GNUC__) and defined (__GLIBC__)
1117
#if not __GLIBC_PREREQ(2, 16)
1118
#pragma GCC diagnostic push
1119
#pragma GCC diagnostic ignored "-Wsign-conversion"
1120
#endif
1121
#endif
1122
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1123
-Wconversion in GNU libc
1124
before 2.16 */
1125
#if defined (__GNUC__) and defined (__GLIBC__)
1126
#if not __GLIBC_PREREQ(2, 16)
1127
#pragma GCC diagnostic pop
1128
#endif
1129
#endif
921
FD_SET(new_plugin->fd, &rfds_all);
1130
922
1131
923
if(maxfd < new_plugin->fd){
1132
924
maxfd = new_plugin->fd;
1133
925
}
1134
926
}
1135
927
1136
TEMP_FAILURE_RETRY(closedir(dir));
928
closedir(dir);
1137
929
dir = NULL;
1138
free_plugin(getplugin(NULL));
1139
930
1140
931
for(plugin *p = plugin_list; p != NULL; p = p->next){
1141
932
if(p->pid != 0){
1152
943
while(plugin_list){
1153
944
fd_set rfds = rfds_all;
1154
945
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1155
if(select_ret == -1 and errno != EINTR){
1156
error(0, errno, "select");
1157
exitstatus = EX_OSERR;
946
if(select_ret == -1){
947
perror("select");
948
exitstatus = EXIT_FAILURE;
1158
949
goto fallback;
1159
950
}
1160
951
/* OK, now either a process completed, or something can be read
1161
952
from one of them */
1162
953
for(plugin *proc = plugin_list; proc != NULL;){
1163
954
/* Is this process completely done? */
1164
if(proc->completed and proc->eof){
955
if(proc->eof and proc->completed){
1165
956
/* Only accept the plugin output if it exited cleanly */
1166
957
if(not WIFEXITED(proc->status)
1167
958
or WEXITSTATUS(proc->status) != 0){
1168
959
/* Bad exit by plugin */
1169
960
1170
961
if(debug){
1171
962
if(WIFEXITED(proc->status)){
1172
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1173
" status %d\n", proc->name,
1174
(intmax_t) (proc->pid),
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
1175
965
WEXITSTATUS(proc->status));
1176
} else if(WIFSIGNALED(proc->status)){
1177
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1178
" signal %d: %s\n", proc->name,
1179
(intmax_t) (proc->pid),
1180
WTERMSIG(proc->status),
1181
strsignal(WTERMSIG(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));
1182
970
} else if(WCOREDUMP(proc->status)){
1183
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1184
" core\n", proc->name, (intmax_t) (proc->pid));
971
fprintf(stderr, "Plugin %u dumped core\n",
972
(unsigned int) (proc->pid));
1185
973
}
1186
974
}
1187
975
1188
976
/* Remove the plugin */
1189
#if defined (__GNUC__) and defined (__GLIBC__)
1190
#if not __GLIBC_PREREQ(2, 16)
1191
#pragma GCC diagnostic push
1192
#pragma GCC diagnostic ignored "-Wsign-conversion"
1193
#endif
1194
#endif
1195
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1196
-Wconversion in GNU libc
1197
before 2.16 */
1198
#if defined (__GNUC__) and defined (__GLIBC__)
1199
#if not __GLIBC_PREREQ(2, 16)
1200
#pragma GCC diagnostic pop
1201
#endif
1202
#endif
1203
977
FD_CLR(proc->fd, &rfds_all);
978
1204
979
/* Block signal while modifying process_list */
1205
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1206
(SIG_BLOCK,
1207
&sigchld_action.sa_mask,
1208
NULL));
980
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1209
981
if(ret < 0){
1210
error(0, errno, "sigprocmask");
1211
exitstatus = EX_OSERR;
982
perror("sigprocmask");
983
exitstatus = EXIT_FAILURE;
1212
984
goto fallback;
1213
985
}
1214
986
1217
989
proc = next_plugin;
1218
990
1219
991
/* We are done modifying process list, so unblock signal */
1220
ret = (int)(TEMP_FAILURE_RETRY
1221
(sigprocmask(SIG_UNBLOCK,
1222
&sigchld_action.sa_mask, NULL)));
992
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
993
NULL);
1223
994
if(ret < 0){
1224
error(0, errno, "sigprocmask");
1225
exitstatus = EX_OSERR;
995
perror("sigprocmask");
996
exitstatus = EXIT_FAILURE;
1226
997
goto fallback;
1227
998
}
1228
999
1238
1009
bool bret = print_out_password(proc->buffer,
1239
1010
proc->buffer_length);
1240
1011
if(not bret){
1241
error(0, errno, "print_out_password");
1242
exitstatus = EX_IOERR;
1012
perror("print_out_password");
1013
exitstatus = EXIT_FAILURE;
1243
1014
}
1244
1015
goto fallback;
1245
1016
}
1246
1017
1247
1018
/* This process has not completed. Does it have any output? */
1248
#if defined (__GNUC__) and defined (__GLIBC__)
1249
#if not __GLIBC_PREREQ(2, 16)
1250
#pragma GCC diagnostic push
1251
#pragma GCC diagnostic ignored "-Wsign-conversion"
1252
#endif
1253
#endif
1254
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1255
warning from
1256
-Wconversion
1257
in GNU libc
1258
before
1259
2.16 */
1260
#if defined (__GNUC__) and defined (__GLIBC__)
1261
#if not __GLIBC_PREREQ(2, 16)
1262
#pragma GCC diagnostic pop
1263
#endif
1264
#endif
1019
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1265
1020
/* This process had nothing to say at this time */
1266
1021
proc = proc->next;
1267
1022
continue;
1268
1023
}
1269
1024
/* Before reading, make the process' data buffer large enough */
1270
1025
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1271
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1272
+ (size_t) BUFFER_SIZE);
1273
if(new_buffer == NULL){
1274
error(0, errno, "malloc");
1275
exitstatus = EX_OSERR;
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;
1276
1031
goto fallback;
1277
1032
}
1278
proc->buffer = new_buffer;
1279
1033
proc->buffer_size += BUFFER_SIZE;
1280
1034
}
1281
1035
/* Read from the process */
1282
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1283
proc->buffer
1284
+ proc->buffer_length,
1285
BUFFER_SIZE));
1036
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1037
BUFFER_SIZE);
1286
1038
if(sret < 0){
1287
1039
/* Read error from this process; ignore the error */
1288
1040
proc = proc->next;
1296
1048
}
1297
1049
}
1298
1050
}
1299
1300
1051
1052
1301
1053
fallback:
1302
1054
1303
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1304
and exitstatus != EX_OK)){
1055
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1305
1056
/* Fallback if all plugins failed, none are found or an error
1306
1057
occured */
1307
1058
bool bret;
1315
1066
}
1316
1067
bret = print_out_password(passwordbuffer, len);
1317
1068
if(not bret){
1318
error(0, errno, "print_out_password");
1319
exitstatus = EX_IOERR;
1069
perror("print_out_password");
1070
exitstatus = EXIT_FAILURE;
1320
1071
}
1321
1072
}
1322
1073
1323
1074
/* Restore old signal handler */
1324
1075
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1325
1076
if(ret == -1){
1326
error(0, errno, "sigaction");
1327
exitstatus = EX_OSERR;
1077
perror("sigaction");
1078
exitstatus = EXIT_FAILURE;
1328
1079
}
1329
1080
1330
1081
if(custom_argv != NULL){
1345
1096
ret = kill(p->pid, SIGTERM);
1346
1097
if(ret == -1 and errno != ESRCH){
1347
1098
/* Set-uid proccesses might not get closed */
1348
error(0, errno, "kill");
1099
perror("kill");
1349
1100
}
1350
1101
}
1351
1102
}
1352
1103
1353
1104
/* Wait for any remaining child processes to terminate */
1354
do {
1105
do{
1355
1106
ret = wait(NULL);
1356
1107
} while(ret >= 0);
1357
1108
if(errno != ECHILD){
1358
error(0, errno, "wait");
1109
perror("wait");
1359
1110
}
1360
1111
1361
1112
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0