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- Committer: Teddy Hogeborn
- Date: 2014-03-01 10:59:22 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 311.
- Revision ID: teddy@recompile.se-20140301105922-xq8gjlvr22187si3
* debian/control (Standards-Version): Updated to "3.9.5".
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files removed:
- etc-plugins.d-README
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 Björn Påhlsson
6
7
*
7
8
* This program is free software: you can redistribute it and/or
8
9
* modify it under the terms of the GNU General Public License as
18
19
* along with this program. If not, see
19
20
* <http://www.gnu.org/licenses/>.
20
21
*
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
22
23
*/
23
24
24
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
26
asprintf(), O_CLOEXEC */
26
27
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
35
36
uid_t, gid_t, getuid(), getgid(),
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() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
46
readdir(), closedir(), dirfd() */
45
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
48
fcntl(), setuid(), setgid(),
47
49
F_GETFD, F_SETFD, FD_CLOEXEC,
48
50
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
51
dup2(), STDOUT_FILENO, _exit(),
50
52
execv(), write(), read(),
51
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
55
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
61
64
#include <signal.h> /* struct sigaction, sigemptyset(),
62
65
sigaddset(), sigaction(),
63
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
69
#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() */
66
75
67
76
#define BUFFER_SIZE 256
68
77
69
78
#define PDIR "/lib/mandos/plugins.d"
70
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
80
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
75
struct plugin;
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
83
77
84
typedef struct plugin{
78
85
char *name; /* can be NULL or any plugin name */
81
88
char **environ;
82
89
int envc;
83
90
bool disabled;
84
91
85
92
/* Variables used for running processes*/
86
93
pid_t pid;
87
94
int fd;
89
96
size_t buffer_size;
90
97
size_t buffer_length;
91
98
bool eof;
92
volatile bool completed;
93
volatile int status;
99
volatile sig_atomic_t completed;
100
int status;
94
101
struct plugin *next;
95
102
} plugin;
96
103
99
106
/* Gets an existing plugin based on name,
100
107
or if none is found, creates a new one */
101
108
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
104
if ((p->name == name)
105
or (p->name and name and (strcmp(p->name, name) == 0))){
109
/* Check for existing plugin with that name */
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
111
if((p->name == name)
112
or (p->name and name and (strcmp(p->name, name) == 0))){
106
113
return p;
107
114
}
108
115
}
109
116
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
117
plugin *new_plugin = NULL;
118
do {
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
121
if(new_plugin == NULL){
112
122
return NULL;
113
123
}
114
124
char *copy_name = NULL;
115
125
if(name != NULL){
116
copy_name = strdup(name);
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
117
129
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
118
133
return NULL;
119
134
}
120
135
}
121
136
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
126
141
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
142
do {
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
145
if(new_plugin->argv == NULL){
146
int e = errno;
129
147
free(copy_name);
130
148
free(new_plugin);
149
errno = e;
131
150
return NULL;
132
151
}
133
152
new_plugin->argv[0] = copy_name;
134
153
new_plugin->argv[1] = NULL;
135
154
136
new_plugin->environ = malloc(sizeof(char *));
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
137
158
if(new_plugin->environ == NULL){
159
int e = errno;
138
160
free(copy_name);
139
161
free(new_plugin->argv);
140
162
free(new_plugin);
163
errno = e;
141
164
return NULL;
142
165
}
143
166
new_plugin->environ[0] = NULL;
148
171
}
149
172
150
173
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
151
175
static bool add_to_char_array(const char *new, char ***array,
152
176
int *len){
153
177
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
178
do {
179
*array = realloc(*array, sizeof(char *)
180
* (size_t) ((*len) + 2));
181
} while(*array == NULL and errno == EINTR);
156
182
/* Malloc check */
157
183
if(*array == NULL){
158
184
return false;
159
185
}
160
186
/* Make a copy of the new string */
161
char *copy = strdup(new);
187
char *copy;
188
do {
189
copy = strdup(new);
190
} while(copy == NULL and errno == EINTR);
162
191
if(copy == NULL){
163
192
return false;
164
193
}
171
200
}
172
201
173
202
/* Add to a plugin's argument vector */
203
__attribute__((nonnull(2)))
174
204
static bool add_argument(plugin *p, const char *arg){
175
205
if(p == NULL){
176
206
return false;
179
209
}
180
210
181
211
/* Add to a plugin's environment */
212
__attribute__((nonnull(2)))
182
213
static bool add_environment(plugin *p, const char *def, bool replace){
183
214
if(p == NULL){
184
215
return false;
190
221
if(strncmp(*e, def, namelen + 1) == 0){
191
222
/* It already exists */
192
223
if(replace){
193
char *new = realloc(*e, strlen(def) + 1);
224
char *new;
225
do {
226
new = realloc(*e, strlen(def) + 1);
227
} while(new == NULL and errno == EINTR);
194
228
if(new == NULL){
195
229
return false;
196
230
}
206
240
/*
207
241
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
242
* Descriptor Flags".
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
243
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
210
244
*/
211
static int set_cloexec_flag(int fd)
212
{
213
int ret = fcntl(fd, F_GETFD, 0);
245
static int set_cloexec_flag(int fd){
246
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
247
/* If reading the flags failed, return error indication now. */
215
248
if(ret < 0){
216
249
return ret;
217
250
}
218
251
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
252
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
253
ret | FD_CLOEXEC));
220
254
}
221
255
222
256
223
257
/* Mark processes as completed when they exit, and save their exit
224
258
status. */
225
void handle_sigchld(__attribute__((unused)) int sig){
259
static void handle_sigchld(__attribute__((unused)) int sig){
260
int old_errno = errno;
226
261
while(true){
227
262
plugin *proc = plugin_list;
228
263
int status;
232
267
break;
233
268
}
234
269
if(pid == -1){
235
if (errno != ECHILD){
236
perror("waitpid");
270
if(errno == ECHILD){
271
/* No child processes */
272
break;
237
273
}
238
/* No child processes */
239
break;
274
error(0, errno, "waitpid");
240
275
}
241
276
242
277
/* A child exited, find it in process_list */
248
283
continue;
249
284
}
250
285
proc->status = status;
251
proc->completed = true;
286
proc->completed = 1;
252
287
}
288
errno = old_errno;
253
289
}
254
290
255
291
/* Prints out a password to stdout */
256
bool print_out_password(const char *buffer, size_t length){
292
__attribute__((nonnull))
293
static bool print_out_password(const char *buffer, size_t length){
257
294
ssize_t ret;
258
295
for(size_t written = 0; written < length; written += (size_t)ret){
259
296
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
266
303
}
267
304
268
305
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
269
307
static void free_plugin(plugin *plugin_node){
270
308
271
309
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
277
315
}
278
316
free(plugin_node->environ);
279
317
free(plugin_node->buffer);
280
318
281
319
/* Removes the plugin from the singly-linked list */
282
320
if(plugin_node == plugin_list){
283
321
/* First one - simple */
311
349
struct stat st;
312
350
fd_set rfds_all;
313
351
int ret, maxfd = 0;
352
ssize_t sret;
314
353
uid_t uid = 65534;
315
354
gid_t gid = 65534;
316
355
bool debug = false;
325
364
sigemptyset(&sigchld_action.sa_mask);
326
365
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
327
366
if(ret == -1){
328
perror("sigaddset");
329
exitstatus = EXIT_FAILURE;
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
330
369
goto fallback;
331
370
}
332
371
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
333
372
if(ret == -1){
334
perror("sigaction");
335
exitstatus = EXIT_FAILURE;
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
336
375
goto fallback;
337
376
}
338
377
370
409
.doc = "Group ID the plugins will run as", .group = 3 },
371
410
{ .name = "debug", .key = 132,
372
411
.doc = "Debug mode", .group = 4 },
412
/*
413
* These reproduce what we would get without ARGP_NO_HELP
414
*/
415
{ .name = "help", .key = '?',
416
.doc = "Give this help list", .group = -1 },
417
{ .name = "usage", .key = -3,
418
.doc = "Give a short usage message", .group = -1 },
419
{ .name = "version", .key = 'V',
420
.doc = "Print program version", .group = -1 },
373
421
{ .name = NULL }
374
422
};
375
423
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
378
switch (key) {
424
__attribute__((nonnull(3)))
425
error_t parse_opt(int key, char *arg, struct argp_state *state){
426
errno = 0;
427
switch(key){
428
char *tmp;
429
intmax_t tmp_id;
379
430
case 'g': /* --global-options */
380
if (arg != NULL){
381
char *p;
382
while((p = strsep(&arg, ",")) != NULL){
383
if(p[0] == '\0'){
384
continue;
385
}
386
if(not add_argument(getplugin(NULL), p)){
387
perror("add_argument");
388
return ARGP_ERR_UNKNOWN;
431
{
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(NULL), plugin_option)){
435
break;
389
436
}
390
437
}
391
438
}
392
439
break;
393
440
case 'G': /* --global-env */
394
if(arg == NULL){
395
break;
396
}
397
if(not add_environment(getplugin(NULL), arg, true)){
398
perror("add_environment");
399
}
441
add_environment(getplugin(NULL), arg, true);
400
442
break;
401
443
case 'o': /* --options-for */
402
if (arg != NULL){
403
char *p_name = strsep(&arg, ":");
404
if(p_name[0] == '\0' or arg == NULL){
405
break;
406
}
407
char *opt = strsep(&arg, ":");
408
if(opt[0] == '\0' or opt == NULL){
409
break;
410
}
411
char *p;
412
while((p = strsep(&opt, ",")) != NULL){
413
if(p[0] == '\0'){
414
continue;
415
}
416
if(not add_argument(getplugin(p_name), p)){
417
perror("add_argument");
418
return ARGP_ERR_UNKNOWN;
444
{
445
char *option_list = strchr(arg, ':');
446
if(option_list == NULL){
447
argp_error(state, "No colon in \"%s\"", arg);
448
errno = EINVAL;
449
break;
450
}
451
*option_list = '\0';
452
option_list++;
453
if(arg[0] == '\0'){
454
argp_error(state, "Empty plugin name");
455
errno = EINVAL;
456
break;
457
}
458
char *option;
459
while((option = strsep(&option_list, ",")) != NULL){
460
if(not add_argument(getplugin(arg), option)){
461
break;
419
462
}
420
463
}
421
464
}
422
465
break;
423
466
case 'E': /* --env-for */
424
if(arg == NULL){
425
break;
426
}
427
467
{
428
468
char *envdef = strchr(arg, ':');
429
469
if(envdef == NULL){
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
430
472
break;
431
473
}
432
474
*envdef = '\0';
433
if(not add_environment(getplugin(arg), envdef+1, true)){
434
perror("add_environment");
475
envdef++;
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
435
480
}
481
add_environment(getplugin(arg), envdef, true);
436
482
}
437
483
break;
438
484
case 'd': /* --disable */
439
if (arg != NULL){
485
{
440
486
plugin *p = getplugin(arg);
441
if(p == NULL){
442
return ARGP_ERR_UNKNOWN;
487
if(p != NULL){
488
p->disabled = true;
443
489
}
444
p->disabled = true;
445
490
}
446
491
break;
447
492
case 'e': /* --enable */
448
if (arg != NULL){
493
{
449
494
plugin *p = getplugin(arg);
450
if(p == NULL){
451
return ARGP_ERR_UNKNOWN;
495
if(p != NULL){
496
p->disabled = false;
452
497
}
453
p->disabled = false;
454
498
}
455
499
break;
456
500
case 128: /* --plugin-dir */
457
501
free(plugindir);
458
502
plugindir = strdup(arg);
459
if(plugindir == NULL){
460
perror("strdup");
461
}
462
503
break;
463
504
case 129: /* --config-file */
464
505
/* This is already done by parse_opt_config_file() */
465
506
break;
466
507
case 130: /* --userid */
467
uid = (uid_t)strtol(arg, NULL, 10);
508
tmp_id = strtoimax(arg, &tmp, 10);
509
if(errno != 0 or tmp == arg or *tmp != '\0'
510
or tmp_id != (uid_t)tmp_id){
511
argp_error(state, "Bad user ID number: \"%s\", using %"
512
PRIdMAX, arg, (intmax_t)uid);
513
break;
514
}
515
uid = (uid_t)tmp_id;
468
516
break;
469
517
case 131: /* --groupid */
470
gid = (gid_t)strtol(arg, NULL, 10);
518
tmp_id = strtoimax(arg, &tmp, 10);
519
if(errno != 0 or tmp == arg or *tmp != '\0'
520
or tmp_id != (gid_t)tmp_id){
521
argp_error(state, "Bad group ID number: \"%s\", using %"
522
PRIdMAX, arg, (intmax_t)gid);
523
break;
524
}
525
gid = (gid_t)tmp_id;
471
526
break;
472
527
case 132: /* --debug */
473
528
debug = true;
474
529
break;
530
/*
531
* These reproduce what we would get without ARGP_NO_HELP
532
*/
533
case '?': /* --help */
534
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
535
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
536
case -3: /* --usage */
537
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
538
argp_state_help(state, state->out_stream,
539
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
540
case 'V': /* --version */
541
fprintf(state->out_stream, "%s\n", argp_program_version);
542
exit(EXIT_SUCCESS);
543
break;
544
/*
545
* When adding more options before this line, remember to also add a
546
* "case" to the "parse_opt_config_file" function below.
547
*/
475
548
case ARGP_KEY_ARG:
476
549
/* Cryptsetup always passes an argument, which is an empty
477
550
string if "none" was specified in /etc/crypttab. So if
478
551
argument was empty, we ignore it silently. */
479
if(arg[0] != '\0'){
480
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
552
if(arg[0] == '\0'){
553
break;
481
554
}
482
break;
483
case ARGP_KEY_END:
484
break;
485
555
default:
486
556
return ARGP_ERR_UNKNOWN;
487
557
}
488
return 0;
558
return errno; /* Set to 0 at start */
489
559
}
490
560
491
561
/* This option parser is the same as parse_opt() above, except it
492
562
ignores everything but the --config-file option. */
493
error_t parse_opt_config_file (int key, char *arg,
494
__attribute__((unused))
495
struct argp_state *state) {
496
switch (key) {
563
error_t parse_opt_config_file(int key, char *arg,
564
__attribute__((unused))
565
struct argp_state *state){
566
errno = 0;
567
switch(key){
497
568
case 'g': /* --global-options */
498
569
case 'G': /* --global-env */
499
570
case 'o': /* --options-for */
505
576
case 129: /* --config-file */
506
577
free(argfile);
507
578
argfile = strdup(arg);
508
if(argfile == NULL){
509
perror("strdup");
510
}
511
break;
579
break;
512
580
case 130: /* --userid */
513
581
case 131: /* --groupid */
514
582
case 132: /* --debug */
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
515
586
case ARGP_KEY_ARG:
516
case ARGP_KEY_END:
517
587
break;
518
588
default:
519
589
return ARGP_ERR_UNKNOWN;
520
590
}
521
return 0;
591
return errno;
522
592
}
523
593
524
594
struct argp argp = { .options = options,
526
596
.args_doc = "",
527
597
.doc = "Mandos plugin runner -- Run plugins" };
528
598
529
/* Parse using the parse_opt_config_file in order to get the custom
599
/* Parse using parse_opt_config_file() in order to get the custom
530
600
config file location, if any. */
531
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
532
if (ret == ARGP_ERR_UNKNOWN){
533
fprintf(stderr, "Unknown error while parsing arguments\n");
534
exitstatus = EXIT_FAILURE;
601
ret = argp_parse(&argp, argc, argv,
602
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
603
NULL, NULL);
604
switch(ret){
605
case 0:
606
break;
607
case ENOMEM:
608
default:
609
errno = ret;
610
error(0, errno, "argp_parse");
611
exitstatus = EX_OSERR;
612
goto fallback;
613
case EINVAL:
614
exitstatus = EX_USAGE;
535
615
goto fallback;
536
616
}
537
617
539
619
argp.parser = parse_opt;
540
620
541
621
/* Open the configfile if available */
542
if (argfile == NULL){
622
if(argfile == NULL){
543
623
conffp = fopen(AFILE, "r");
544
624
} else {
545
625
conffp = fopen(argfile, "r");
546
}
626
}
547
627
if(conffp != NULL){
548
628
char *org_line = NULL;
549
629
char *p, *arg, *new_arg, *line;
550
630
size_t size = 0;
551
ssize_t sret;
552
631
const char whitespace_delims[] = " \r\t\f\v\n";
553
632
const char comment_delim[] = "#";
554
633
555
634
custom_argc = 1;
556
635
custom_argv = malloc(sizeof(char*) * 2);
557
636
if(custom_argv == NULL){
558
perror("malloc");
559
exitstatus = EXIT_FAILURE;
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
560
639
goto fallback;
561
640
}
562
641
custom_argv[0] = argv[0];
563
642
custom_argv[1] = NULL;
564
643
565
644
/* for each line in the config file, strip whitespace and ignore
566
645
commented text */
567
646
while(true){
569
648
if(sret == -1){
570
649
break;
571
650
}
572
651
573
652
line = org_line;
574
653
arg = strsep(&line, comment_delim);
575
654
while((p = strsep(&arg, whitespace_delims)) != NULL){
578
657
}
579
658
new_arg = strdup(p);
580
659
if(new_arg == NULL){
581
perror("strdup");
582
exitstatus = EXIT_FAILURE;
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
583
662
free(org_line);
584
663
goto fallback;
585
664
}
588
667
custom_argv = realloc(custom_argv, sizeof(char *)
589
668
* ((unsigned int) custom_argc + 1));
590
669
if(custom_argv == NULL){
591
perror("realloc");
592
exitstatus = EXIT_FAILURE;
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
593
672
free(org_line);
594
673
goto fallback;
595
674
}
596
675
custom_argv[custom_argc-1] = new_arg;
597
custom_argv[custom_argc] = NULL;
676
custom_argv[custom_argc] = NULL;
598
677
}
599
678
}
679
do {
680
ret = fclose(conffp);
681
} while(ret == EOF and errno == EINTR);
682
if(ret == EOF){
683
error(0, errno, "fclose");
684
exitstatus = EX_IOERR;
685
goto fallback;
686
}
600
687
free(org_line);
601
688
} else {
602
689
/* Check for harmful errors and go to fallback. Other errors might
603
690
not affect opening plugins */
604
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
605
perror("fopen");
606
exitstatus = EXIT_FAILURE;
691
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
607
694
goto fallback;
608
695
}
609
696
}
610
/* If there was any arguments from configuration file,
611
pass them to parser as command arguments */
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
612
699
if(custom_argv != NULL){
613
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
614
0, NULL);
615
if (ret == ARGP_ERR_UNKNOWN){
616
fprintf(stderr, "Unknown error while parsing arguments\n");
617
exitstatus = EXIT_FAILURE;
700
ret = argp_parse(&argp, custom_argc, custom_argv,
701
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
702
NULL, NULL);
703
switch(ret){
704
case 0:
705
break;
706
case ENOMEM:
707
default:
708
errno = ret;
709
error(0, errno, "argp_parse");
710
exitstatus = EX_OSERR;
711
goto fallback;
712
case EINVAL:
713
exitstatus = EX_CONFIG;
618
714
goto fallback;
619
715
}
620
716
}
621
717
622
718
/* Parse actual command line arguments, to let them override the
623
719
config file */
624
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
625
if (ret == ARGP_ERR_UNKNOWN){
626
fprintf(stderr, "Unknown error while parsing arguments\n");
627
exitstatus = EXIT_FAILURE;
720
ret = argp_parse(&argp, argc, argv,
721
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
722
NULL, NULL);
723
switch(ret){
724
case 0:
725
break;
726
case ENOMEM:
727
default:
728
errno = ret;
729
error(0, errno, "argp_parse");
730
exitstatus = EX_OSERR;
731
goto fallback;
732
case EINVAL:
733
exitstatus = EX_USAGE;
628
734
goto fallback;
629
735
}
630
736
635
741
for(char **a = p->argv; *a != NULL; a++){
636
742
fprintf(stderr, "\tArg: %s\n", *a);
637
743
}
638
fprintf(stderr, "...and %u environment variables\n", p->envc);
744
fprintf(stderr, "...and %d environment variables\n", p->envc);
639
745
for(char **a = p->environ; *a != NULL; a++){
640
746
fprintf(stderr, "\t%s\n", *a);
641
747
}
642
748
}
643
749
}
644
750
645
/* Strip permissions down to nobody */
751
if(getuid() == 0){
752
/* Work around Debian bug #633582:
753
<http://bugs.debian.org/633582> */
754
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
755
if(plugindir_fd == -1){
756
error(0, errno, "open");
757
} else {
758
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
759
if(ret == -1){
760
error(0, errno, "fstat");
761
} else {
762
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
763
ret = fchown(plugindir_fd, uid, gid);
764
if(ret == -1){
765
error(0, errno, "fchown");
766
}
767
}
768
}
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
770
}
771
}
772
773
/* Lower permissions */
774
ret = setgid(gid);
775
if(ret == -1){
776
error(0, errno, "setgid");
777
}
646
778
ret = setuid(uid);
647
if (ret == -1){
648
perror("setuid");
649
}
650
setgid(gid);
651
if (ret == -1){
652
perror("setgid");
653
}
654
655
if (plugindir == NULL){
656
dir = opendir(PDIR);
657
} else {
658
dir = opendir(plugindir);
659
}
660
661
if(dir == NULL){
662
perror("Could not open plugin dir");
663
exitstatus = EXIT_FAILURE;
664
goto fallback;
665
}
666
667
/* Set the FD_CLOEXEC flag on the directory, if possible */
779
if(ret == -1){
780
error(0, errno, "setuid");
781
}
782
783
/* Open plugin directory with close_on_exec flag */
668
784
{
669
int dir_fd = dirfd(dir);
670
if(dir_fd >= 0){
671
ret = set_cloexec_flag(dir_fd);
672
if(ret < 0){
673
perror("set_cloexec_flag");
674
exitstatus = EXIT_FAILURE;
675
goto fallback;
676
}
785
int dir_fd = -1;
786
if(plugindir == NULL){
787
dir_fd = open(PDIR, O_RDONLY |
788
#ifdef O_CLOEXEC
789
O_CLOEXEC
790
#else /* not O_CLOEXEC */
791
0
792
#endif /* not O_CLOEXEC */
793
);
794
} else {
795
dir_fd = open(plugindir, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
}
803
if(dir_fd == -1){
804
error(0, errno, "Could not open plugin dir");
805
exitstatus = EX_UNAVAILABLE;
806
goto fallback;
807
}
808
809
#ifndef O_CLOEXEC
810
/* Set the FD_CLOEXEC flag on the directory */
811
ret = set_cloexec_flag(dir_fd);
812
if(ret < 0){
813
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
815
exitstatus = EX_OSERR;
816
goto fallback;
817
}
818
#endif /* O_CLOEXEC */
819
820
dir = fdopendir(dir_fd);
821
if(dir == NULL){
822
error(0, errno, "Could not open plugin dir");
823
TEMP_FAILURE_RETRY(close(dir_fd));
824
exitstatus = EX_OSERR;
825
goto fallback;
677
826
}
678
827
}
679
828
681
830
682
831
/* Read and execute any executable in the plugin directory*/
683
832
while(true){
684
dirst = readdir(dir);
833
do {
834
dirst = readdir(dir);
835
} while(dirst == NULL and errno == EINTR);
685
836
686
837
/* All directory entries have been processed */
687
838
if(dirst == NULL){
688
if (errno == EBADF){
689
perror("readdir");
690
exitstatus = EXIT_FAILURE;
839
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
691
842
goto fallback;
692
843
}
693
844
break;
699
850
{
700
851
bool bad_name = false;
701
852
702
const char const *bad_prefixes[] = { ".", "#", NULL };
853
const char * const bad_prefixes[] = { ".", "#", NULL };
703
854
704
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
855
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
705
856
".dpkg-old",
857
".dpkg-bak",
706
858
".dpkg-divert", NULL };
707
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
859
#pragma GCC diagnostic push
860
#pragma GCC diagnostic ignored "-Wcast-qual"
861
for(const char **pre = (const char **)bad_prefixes;
862
*pre != NULL; pre++){
863
#pragma GCC diagnostic pop
708
864
size_t pre_len = strlen(*pre);
709
865
if((d_name_len >= pre_len)
710
866
and strncmp((dirst->d_name), *pre, pre_len) == 0){
719
875
if(bad_name){
720
876
continue;
721
877
}
722
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
878
#pragma GCC diagnostic push
879
#pragma GCC diagnostic ignored "-Wcast-qual"
880
for(const char **suf = (const char **)bad_suffixes;
881
*suf != NULL; suf++){
882
#pragma GCC diagnostic pop
723
883
size_t suf_len = strlen(*suf);
724
884
if((d_name_len >= suf_len)
725
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
885
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
726
886
== 0)){
727
887
if(debug){
728
888
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
737
897
continue;
738
898
}
739
899
}
740
900
741
901
char *filename;
742
902
if(plugindir == NULL){
743
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
903
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
904
dirst->d_name));
744
905
} else {
745
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
906
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
907
plugindir,
908
dirst->d_name));
746
909
}
747
910
if(ret < 0){
748
perror("asprintf");
911
error(0, errno, "asprintf");
749
912
continue;
750
913
}
751
914
752
ret = stat(filename, &st);
753
if (ret == -1){
754
perror("stat");
915
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
916
if(ret == -1){
917
error(0, errno, "stat");
755
918
free(filename);
756
919
continue;
757
920
}
758
921
759
922
/* Ignore non-executable files */
760
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
923
if(not S_ISREG(st.st_mode)
924
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
761
925
if(debug){
762
926
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
763
927
" with bad type or mode\n", filename);
768
932
769
933
plugin *p = getplugin(dirst->d_name);
770
934
if(p == NULL){
771
perror("getplugin");
935
error(0, errno, "getplugin");
772
936
free(filename);
773
937
continue;
774
938
}
786
950
if(g != NULL){
787
951
for(char **a = g->argv + 1; *a != NULL; a++){
788
952
if(not add_argument(p, *a)){
789
perror("add_argument");
953
error(0, errno, "add_argument");
790
954
}
791
955
}
792
956
/* Add global environment variables */
793
957
for(char **e = g->environ; *e != NULL; e++){
794
958
if(not add_environment(p, *e, false)){
795
perror("add_environment");
959
error(0, errno, "add_environment");
796
960
}
797
961
}
798
962
}
803
967
if(p->environ[0] != NULL){
804
968
for(char **e = environ; *e != NULL; e++){
805
969
if(not add_environment(p, *e, false)){
806
perror("add_environment");
970
error(0, errno, "add_environment");
807
971
}
808
972
}
809
973
}
810
974
811
975
int pipefd[2];
812
ret = pipe(pipefd);
813
if (ret == -1){
814
perror("pipe");
815
exitstatus = EXIT_FAILURE;
976
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
977
if(ret == -1){
978
error(0, errno, "pipe");
979
exitstatus = EX_OSERR;
816
980
goto fallback;
817
981
}
818
982
/* Ask OS to automatic close the pipe on exec */
819
983
ret = set_cloexec_flag(pipefd[0]);
820
984
if(ret < 0){
821
perror("set_cloexec_flag");
822
exitstatus = EXIT_FAILURE;
985
error(0, errno, "set_cloexec_flag");
986
exitstatus = EX_OSERR;
823
987
goto fallback;
824
988
}
825
989
ret = set_cloexec_flag(pipefd[1]);
826
990
if(ret < 0){
827
perror("set_cloexec_flag");
828
exitstatus = EXIT_FAILURE;
991
error(0, errno, "set_cloexec_flag");
992
exitstatus = EX_OSERR;
829
993
goto fallback;
830
994
}
831
995
/* Block SIGCHLD until process is safely in process list */
832
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
996
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
997
&sigchld_action.sa_mask,
998
NULL));
833
999
if(ret < 0){
834
perror("sigprocmask");
835
exitstatus = EXIT_FAILURE;
1000
error(0, errno, "sigprocmask");
1001
exitstatus = EX_OSERR;
836
1002
goto fallback;
837
1003
}
838
1004
/* Starting a new process to be watched */
839
pid_t pid = fork();
1005
pid_t pid;
1006
do {
1007
pid = fork();
1008
} while(pid == -1 and errno == EINTR);
840
1009
if(pid == -1){
841
perror("fork");
842
exitstatus = EXIT_FAILURE;
1010
error(0, errno, "fork");
1011
exitstatus = EX_OSERR;
843
1012
goto fallback;
844
1013
}
845
1014
if(pid == 0){
846
1015
/* this is the child process */
847
1016
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
848
1017
if(ret < 0){
849
perror("sigaction");
850
_exit(EXIT_FAILURE);
1018
error(0, errno, "sigaction");
1019
_exit(EX_OSERR);
851
1020
}
852
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1021
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
853
1022
if(ret < 0){
854
perror("sigprocmask");
855
_exit(EXIT_FAILURE);
1023
error(0, errno, "sigprocmask");
1024
_exit(EX_OSERR);
856
1025
}
857
1026
858
1027
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
859
1028
if(ret == -1){
860
perror("dup2");
861
_exit(EXIT_FAILURE);
1029
error(0, errno, "dup2");
1030
_exit(EX_OSERR);
862
1031
}
863
1032
864
1033
if(dirfd(dir) < 0){
868
1037
}
869
1038
if(p->environ[0] == NULL){
870
1039
if(execv(filename, p->argv) < 0){
871
perror("execv");
872
_exit(EXIT_FAILURE);
1040
error(0, errno, "execv for %s", filename);
1041
_exit(EX_OSERR);
873
1042
}
874
1043
} else {
875
1044
if(execve(filename, p->argv, p->environ) < 0){
876
perror("execve");
877
_exit(EXIT_FAILURE);
1045
error(0, errno, "execve for %s", filename);
1046
_exit(EX_OSERR);
878
1047
}
879
1048
}
880
1049
/* no return */
881
1050
}
882
1051
/* Parent process */
883
close(pipefd[1]); /* Close unused write end of pipe */
1052
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1053
pipe */
884
1054
free(filename);
885
1055
plugin *new_plugin = getplugin(dirst->d_name);
886
if (new_plugin == NULL){
887
perror("getplugin");
888
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1056
if(new_plugin == NULL){
1057
error(0, errno, "getplugin");
1058
ret = (int)(TEMP_FAILURE_RETRY
1059
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1060
NULL)));
889
1061
if(ret < 0){
890
perror("sigprocmask");
1062
error(0, errno, "sigprocmask");
891
1063
}
892
exitstatus = EXIT_FAILURE;
1064
exitstatus = EX_OSERR;
893
1065
goto fallback;
894
1066
}
895
1067
898
1070
899
1071
/* Unblock SIGCHLD so signal handler can be run if this process
900
1072
has already completed */
901
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1073
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1074
&sigchld_action.sa_mask,
1075
NULL));
902
1076
if(ret < 0){
903
perror("sigprocmask");
904
exitstatus = EXIT_FAILURE;
1077
error(0, errno, "sigprocmask");
1078
exitstatus = EX_OSERR;
905
1079
goto fallback;
906
1080
}
907
1081
908
FD_SET(new_plugin->fd, &rfds_all);
1082
#if defined (__GNUC__) and defined (__GLIBC__)
1083
#if not __GLIBC_PREREQ(2, 16)
1084
#pragma GCC diagnostic push
1085
#pragma GCC diagnostic ignored "-Wsign-conversion"
1086
#endif
1087
#endif
1088
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1089
-Wconversion in GNU libc
1090
before 2.16 */
1091
#if defined (__GNUC__) and defined (__GLIBC__)
1092
#if not __GLIBC_PREREQ(2, 16)
1093
#pragma GCC diagnostic pop
1094
#endif
1095
#endif
909
1096
910
if (maxfd < new_plugin->fd){
1097
if(maxfd < new_plugin->fd){
911
1098
maxfd = new_plugin->fd;
912
1099
}
913
914
1100
}
915
1101
916
closedir(dir);
1102
TEMP_FAILURE_RETRY(closedir(dir));
917
1103
dir = NULL;
918
1104
free_plugin(getplugin(NULL));
1105
919
1106
for(plugin *p = plugin_list; p != NULL; p = p->next){
920
1107
if(p->pid != 0){
921
1108
break;
926
1113
free_plugin_list();
927
1114
}
928
1115
}
929
1116
930
1117
/* Main loop while running plugins exist */
931
1118
while(plugin_list){
932
1119
fd_set rfds = rfds_all;
933
1120
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
934
if (select_ret == -1){
935
perror("select");
936
exitstatus = EXIT_FAILURE;
1121
if(select_ret == -1 and errno != EINTR){
1122
error(0, errno, "select");
1123
exitstatus = EX_OSERR;
937
1124
goto fallback;
938
1125
}
939
1126
/* OK, now either a process completed, or something can be read
940
1127
from one of them */
941
1128
for(plugin *proc = plugin_list; proc != NULL;){
942
1129
/* Is this process completely done? */
943
if(proc->eof and proc->completed){
1130
if(proc->completed and proc->eof){
944
1131
/* Only accept the plugin output if it exited cleanly */
945
1132
if(not WIFEXITED(proc->status)
946
1133
or WEXITSTATUS(proc->status) != 0){
947
1134
/* Bad exit by plugin */
948
1135
949
1136
if(debug){
950
1137
if(WIFEXITED(proc->status)){
951
fprintf(stderr, "Plugin %u exited with status %d\n",
952
(unsigned int) (proc->pid),
1138
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1139
" status %d\n", proc->name,
1140
(intmax_t) (proc->pid),
953
1141
WEXITSTATUS(proc->status));
954
} else if(WIFSIGNALED(proc->status)) {
955
fprintf(stderr, "Plugin %u killed by signal %d\n",
956
(unsigned int) (proc->pid),
957
WTERMSIG(proc->status));
1142
} else if(WIFSIGNALED(proc->status)){
1143
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1144
" signal %d: %s\n", proc->name,
1145
(intmax_t) (proc->pid),
1146
WTERMSIG(proc->status),
1147
strsignal(WTERMSIG(proc->status)));
958
1148
} else if(WCOREDUMP(proc->status)){
959
fprintf(stderr, "Plugin %d dumped core\n",
960
(unsigned int) (proc->pid));
1149
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1150
" core\n", proc->name, (intmax_t) (proc->pid));
961
1151
}
962
1152
}
963
1153
964
1154
/* Remove the plugin */
965
FD_CLR(proc->fd, &rfds_all);
966
1155
#if defined (__GNUC__) and defined (__GLIBC__)
1156
#if not __GLIBC_PREREQ(2, 16)
1157
#pragma GCC diagnostic push
1158
#pragma GCC diagnostic ignored "-Wsign-conversion"
1159
#endif
1160
#endif
1161
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1162
-Wconversion in GNU libc
1163
before 2.16 */
1164
#if defined (__GNUC__) and defined (__GLIBC__)
1165
#if not __GLIBC_PREREQ(2, 16)
1166
#pragma GCC diagnostic pop
1167
#endif
1168
#endif
1169
967
1170
/* Block signal while modifying process_list */
968
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
969
if(ret < 0){
970
perror("sigprocmask");
971
exitstatus = EXIT_FAILURE;
972
goto fallback;
973
}
974
975
/* We are done modifying process list, so unblock signal */
976
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
977
NULL);
978
if(ret < 0){
979
perror("sigprocmask");
980
exitstatus = EXIT_FAILURE;
981
goto fallback;
982
}
983
984
if(plugin_list == NULL){
985
break;
1171
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1172
(SIG_BLOCK,
1173
&sigchld_action.sa_mask,
1174
NULL));
1175
if(ret < 0){
1176
error(0, errno, "sigprocmask");
1177
exitstatus = EX_OSERR;
1178
goto fallback;
986
1179
}
987
1180
988
1181
plugin *next_plugin = proc->next;
989
1182
free_plugin(proc);
990
1183
proc = next_plugin;
1184
1185
/* We are done modifying process list, so unblock signal */
1186
ret = (int)(TEMP_FAILURE_RETRY
1187
(sigprocmask(SIG_UNBLOCK,
1188
&sigchld_action.sa_mask, NULL)));
1189
if(ret < 0){
1190
error(0, errno, "sigprocmask");
1191
exitstatus = EX_OSERR;
1192
goto fallback;
1193
}
1194
1195
if(plugin_list == NULL){
1196
break;
1197
}
1198
991
1199
continue;
992
1200
}
993
1201
994
1202
/* This process exited nicely, so print its buffer */
995
1203
996
1204
bool bret = print_out_password(proc->buffer,
997
1205
proc->buffer_length);
998
1206
if(not bret){
999
perror("print_out_password");
1000
exitstatus = EXIT_FAILURE;
1207
error(0, errno, "print_out_password");
1208
exitstatus = EX_IOERR;
1001
1209
}
1002
1210
goto fallback;
1003
1211
}
1004
1212
1005
1213
/* This process has not completed. Does it have any output? */
1006
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1214
#if defined (__GNUC__) and defined (__GLIBC__)
1215
#if not __GLIBC_PREREQ(2, 16)
1216
#pragma GCC diagnostic push
1217
#pragma GCC diagnostic ignored "-Wsign-conversion"
1218
#endif
1219
#endif
1220
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1221
warning from
1222
-Wconversion
1223
in GNU libc
1224
before
1225
2.16 */
1226
#if defined (__GNUC__) and defined (__GLIBC__)
1227
#if not __GLIBC_PREREQ(2, 16)
1228
#pragma GCC diagnostic pop
1229
#endif
1230
#endif
1007
1231
/* This process had nothing to say at this time */
1008
1232
proc = proc->next;
1009
1233
continue;
1012
1236
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1013
1237
proc->buffer = realloc(proc->buffer, proc->buffer_size
1014
1238
+ (size_t) BUFFER_SIZE);
1015
if (proc->buffer == NULL){
1016
perror("malloc");
1017
exitstatus = EXIT_FAILURE;
1239
if(proc->buffer == NULL){
1240
error(0, errno, "malloc");
1241
exitstatus = EX_OSERR;
1018
1242
goto fallback;
1019
1243
}
1020
1244
proc->buffer_size += BUFFER_SIZE;
1021
1245
}
1022
1246
/* Read from the process */
1023
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1024
BUFFER_SIZE);
1025
if(ret < 0){
1247
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1248
proc->buffer
1249
+ proc->buffer_length,
1250
BUFFER_SIZE));
1251
if(sret < 0){
1026
1252
/* Read error from this process; ignore the error */
1027
1253
proc = proc->next;
1028
1254
continue;
1029
1255
}
1030
if(ret == 0){
1256
if(sret == 0){
1031
1257
/* got EOF */
1032
1258
proc->eof = true;
1033
1259
} else {
1034
proc->buffer_length += (size_t) ret;
1260
proc->buffer_length += (size_t) sret;
1035
1261
}
1036
1262
}
1037
1263
}
1038
1039
1264
1265
1040
1266
fallback:
1041
1267
1042
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1268
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1269
and exitstatus != EX_OK)){
1043
1270
/* Fallback if all plugins failed, none are found or an error
1044
1271
occured */
1045
1272
bool bret;
1053
1280
}
1054
1281
bret = print_out_password(passwordbuffer, len);
1055
1282
if(not bret){
1056
perror("print_out_password");
1057
exitstatus = EXIT_FAILURE;
1283
error(0, errno, "print_out_password");
1284
exitstatus = EX_IOERR;
1058
1285
}
1059
1286
}
1060
1287
1061
1288
/* Restore old signal handler */
1062
1289
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1063
1290
if(ret == -1){
1064
perror("sigaction");
1065
exitstatus = EXIT_FAILURE;
1291
error(0, errno, "sigaction");
1292
exitstatus = EX_OSERR;
1066
1293
}
1067
1294
1068
1295
if(custom_argv != NULL){
1069
1296
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1070
1297
free(*arg);
1076
1303
closedir(dir);
1077
1304
}
1078
1305
1079
/* Free the process list and kill the processes */
1306
/* Kill the processes */
1080
1307
for(plugin *p = plugin_list; p != NULL; p = p->next){
1081
1308
if(p->pid != 0){
1082
1309
close(p->fd);
1083
1310
ret = kill(p->pid, SIGTERM);
1084
1311
if(ret == -1 and errno != ESRCH){
1085
1312
/* Set-uid proccesses might not get closed */
1086
perror("kill");
1313
error(0, errno, "kill");
1087
1314
}
1088
1315
}
1089
1316
}
1090
1317
1091
1318
/* Wait for any remaining child processes to terminate */
1092
do{
1319
do {
1093
1320
ret = wait(NULL);
1094
1321
} while(ret >= 0);
1095
1322
if(errno != ECHILD){
1096
perror("wait");
1323
error(0, errno, "wait");
1097
1324
}
1098
1325
1099
1326
free_plugin_list();
1100
1327
1101
1328
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0