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- Committer: Teddy Hogeborn
- Date: 2008-09-06 17:24:58 UTC
- Revision ID: teddy@fukt.bsnet.se-20080906172458-2x5wlfkn7oqckt1y
* legalnotice.xml: Copy DocBook 4.4-formatted text from
<http://www.gnu.org/licenses/gpl-3.0.dbk>.
<http://www.gnu.org/licenses/gpl-3.0.dbk>.
- files added:
- etc-plugins.d-README
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- 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 © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 Björn Påhlsson
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
8
7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
19
18
* along with this program. If not, see
20
19
* <http://www.gnu.org/licenses/>.
21
20
*
22
* Contact the authors at <mandos@recompile.se>.
21
* Contact the authors at <mandos@fukt.bsnet.se>.
23
22
*/
24
23
25
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
25
asprintf() */
27
26
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
30
29
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
33
stat, waitpid(), WIFEXITED(),
35
34
WEXITSTATUS(), wait(), pid_t,
36
35
uid_t, gid_t, getuid(), getgid(),
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
40
WEXITSTATUS() */
43
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
42
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
44
readdir(), closedir(), dirfd() */
47
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
46
fcntl(), setuid(), setgid(),
49
47
F_GETFD, F_SETFD, FD_CLOEXEC,
50
48
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
49
dup2, STDOUT_FILENO, _exit(),
52
50
execv(), write(), read(),
53
51
close() */
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
53
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
58
55
#include <errno.h> /* errno */
59
56
#include <argp.h> /* struct argp_option, struct
60
57
argp_state, struct argp,
64
61
#include <signal.h> /* struct sigaction, sigemptyset(),
65
62
sigaddset(), sigaction(),
66
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
64
SIG_UNBLOCK, kill() */
69
65
#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
66
76
67
#define BUFFER_SIZE 256
77
68
78
69
#define PDIR "/lib/mandos/plugins.d"
79
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
71
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
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;
83
76
84
77
typedef struct plugin{
85
78
char *name; /* can be NULL or any plugin name */
88
81
char **environ;
89
82
int envc;
90
83
bool disabled;
91
84
92
85
/* Variables used for running processes*/
93
86
pid_t pid;
94
87
int fd;
96
89
size_t buffer_size;
97
90
size_t buffer_length;
98
91
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
92
volatile bool completed;
93
volatile int status;
101
94
struct plugin *next;
102
95
} plugin;
103
96
106
99
/* Gets an existing plugin based on name,
107
100
or if none is found, creates a new one */
108
101
static plugin *getplugin(char *name){
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))){
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))){
113
106
return p;
114
107
}
115
108
}
116
109
/* Create a new plugin */
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){
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
122
112
return NULL;
123
113
}
124
114
char *copy_name = NULL;
125
115
if(name != NULL){
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
116
copy_name = strdup(name);
129
117
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
133
118
return NULL;
134
119
}
135
120
}
136
121
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
141
126
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;
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
147
129
free(copy_name);
148
130
free(new_plugin);
149
errno = e;
150
131
return NULL;
151
132
}
152
133
new_plugin->argv[0] = copy_name;
153
134
new_plugin->argv[1] = NULL;
154
135
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
136
new_plugin->environ = malloc(sizeof(char *));
158
137
if(new_plugin->environ == NULL){
159
int e = errno;
160
138
free(copy_name);
161
139
free(new_plugin->argv);
162
140
free(new_plugin);
163
errno = e;
164
141
return NULL;
165
142
}
166
143
new_plugin->environ[0] = NULL;
171
148
}
172
149
173
150
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
175
151
static bool add_to_char_array(const char *new, char ***array,
176
152
int *len){
177
153
/* Resize the pointed-to array to hold one more pointer */
178
do {
179
*array = realloc(*array, sizeof(char *)
180
* (size_t) ((*len) + 2));
181
} while(*array == NULL and errno == EINTR);
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
182
156
/* Malloc check */
183
157
if(*array == NULL){
184
158
return false;
185
159
}
186
160
/* Make a copy of the new string */
187
char *copy;
188
do {
189
copy = strdup(new);
190
} while(copy == NULL and errno == EINTR);
161
char *copy = strdup(new);
191
162
if(copy == NULL){
192
163
return false;
193
164
}
200
171
}
201
172
202
173
/* Add to a plugin's argument vector */
203
__attribute__((nonnull(2)))
204
174
static bool add_argument(plugin *p, const char *arg){
205
175
if(p == NULL){
206
176
return false;
209
179
}
210
180
211
181
/* Add to a plugin's environment */
212
__attribute__((nonnull(2)))
213
182
static bool add_environment(plugin *p, const char *def, bool replace){
214
183
if(p == NULL){
215
184
return false;
221
190
if(strncmp(*e, def, namelen + 1) == 0){
222
191
/* It already exists */
223
192
if(replace){
224
char *new;
225
do {
226
new = realloc(*e, strlen(def) + 1);
227
} while(new == NULL and errno == EINTR);
193
char *new = realloc(*e, strlen(def) + 1);
228
194
if(new == NULL){
229
195
return false;
230
196
}
240
206
/*
241
207
* Based on the example in the GNU LibC manual chapter 13.13 "File
242
208
* Descriptor Flags".
243
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
244
210
*/
245
static int set_cloexec_flag(int fd){
246
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
static int set_cloexec_flag(int fd)
212
{
213
int ret = fcntl(fd, F_GETFD, 0);
247
214
/* If reading the flags failed, return error indication now. */
248
215
if(ret < 0){
249
216
return ret;
250
217
}
251
218
/* Store modified flag word in the descriptor. */
252
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
253
ret | FD_CLOEXEC));
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
254
220
}
255
221
256
222
257
223
/* Mark processes as completed when they exit, and save their exit
258
224
status. */
259
static void handle_sigchld(__attribute__((unused)) int sig){
260
int old_errno = errno;
225
void handle_sigchld(__attribute__((unused)) int sig){
261
226
while(true){
262
227
plugin *proc = plugin_list;
263
228
int status;
267
232
break;
268
233
}
269
234
if(pid == -1){
270
if(errno == ECHILD){
271
/* No child processes */
272
break;
235
if (errno != ECHILD){
236
perror("waitpid");
273
237
}
274
error(0, errno, "waitpid");
238
/* No child processes */
239
break;
275
240
}
276
241
277
242
/* A child exited, find it in process_list */
283
248
continue;
284
249
}
285
250
proc->status = status;
286
proc->completed = 1;
251
proc->completed = true;
287
252
}
288
errno = old_errno;
289
253
}
290
254
291
255
/* Prints out a password to stdout */
292
__attribute__((nonnull))
293
static bool print_out_password(const char *buffer, size_t length){
256
bool print_out_password(const char *buffer, size_t length){
294
257
ssize_t ret;
295
258
for(size_t written = 0; written < length; written += (size_t)ret){
296
259
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
303
266
}
304
267
305
268
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
307
269
static void free_plugin(plugin *plugin_node){
308
270
309
271
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
315
277
}
316
278
free(plugin_node->environ);
317
279
free(plugin_node->buffer);
318
280
319
281
/* Removes the plugin from the singly-linked list */
320
282
if(plugin_node == plugin_list){
321
283
/* First one - simple */
349
311
struct stat st;
350
312
fd_set rfds_all;
351
313
int ret, maxfd = 0;
352
ssize_t sret;
353
314
uid_t uid = 65534;
354
315
gid_t gid = 65534;
355
316
bool debug = false;
364
325
sigemptyset(&sigchld_action.sa_mask);
365
326
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
366
327
if(ret == -1){
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
328
perror("sigaddset");
329
exitstatus = EXIT_FAILURE;
369
330
goto fallback;
370
331
}
371
332
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
372
333
if(ret == -1){
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
334
perror("sigaction");
335
exitstatus = EXIT_FAILURE;
375
336
goto fallback;
376
337
}
377
338
409
370
.doc = "Group ID the plugins will run as", .group = 3 },
410
371
{ .name = "debug", .key = 132,
411
372
.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 },
421
373
{ .name = NULL }
422
374
};
423
375
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;
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
378
switch (key) {
430
379
case 'g': /* --global-options */
431
{
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(NULL), plugin_option)){
435
break;
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;
436
389
}
437
390
}
438
391
}
439
392
break;
440
393
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
394
if(arg == NULL){
395
break;
396
}
397
{
398
char *envdef = strdup(arg);
399
if(envdef == NULL){
400
break;
401
}
402
if(not add_environment(getplugin(NULL), envdef, true)){
403
perror("add_environment");
404
}
405
}
442
406
break;
443
407
case 'o': /* --options-for */
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;
408
if (arg != NULL){
409
char *p_name = strsep(&arg, ":");
410
if(p_name[0] == '\0' or arg == NULL){
411
break;
412
}
413
char *opt = strsep(&arg, ":");
414
if(opt[0] == '\0' or opt == NULL){
415
break;
416
}
417
char *p;
418
while((p = strsep(&opt, ",")) != NULL){
419
if(p[0] == '\0'){
420
continue;
421
}
422
if(not add_argument(getplugin(p_name), p)){
423
perror("add_argument");
424
return ARGP_ERR_UNKNOWN;
462
425
}
463
426
}
464
427
}
465
428
break;
466
429
case 'E': /* --env-for */
430
if(arg == NULL){
431
break;
432
}
467
433
{
468
434
char *envdef = strchr(arg, ':');
469
435
if(envdef == NULL){
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
472
break;
473
}
474
*envdef = '\0';
436
break;
437
}
438
char *p_name = strndup(arg, (size_t) (envdef-arg));
439
if(p_name == NULL){
440
break;
441
}
475
442
envdef++;
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
443
if(not add_environment(getplugin(p_name), envdef, true)){
444
perror("add_environment");
480
445
}
481
add_environment(getplugin(arg), envdef, true);
482
446
}
483
447
break;
484
448
case 'd': /* --disable */
485
{
449
if (arg != NULL){
486
450
plugin *p = getplugin(arg);
487
if(p != NULL){
488
p->disabled = true;
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
489
453
}
454
p->disabled = true;
490
455
}
491
456
break;
492
457
case 'e': /* --enable */
493
{
458
if (arg != NULL){
494
459
plugin *p = getplugin(arg);
495
if(p != NULL){
496
p->disabled = false;
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
497
462
}
463
p->disabled = false;
498
464
}
499
465
break;
500
466
case 128: /* --plugin-dir */
501
free(plugindir);
502
467
plugindir = strdup(arg);
468
if(plugindir == NULL){
469
perror("strdup");
470
}
503
471
break;
504
472
case 129: /* --config-file */
505
473
/* This is already done by parse_opt_config_file() */
506
474
break;
507
475
case 130: /* --userid */
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;
476
uid = (uid_t)strtol(arg, NULL, 10);
516
477
break;
517
478
case 131: /* --groupid */
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;
479
gid = (gid_t)strtol(arg, NULL, 10);
526
480
break;
527
481
case 132: /* --debug */
528
482
debug = true;
529
483
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
*/
548
484
case ARGP_KEY_ARG:
549
/* Cryptsetup always passes an argument, which is an empty
550
string if "none" was specified in /etc/crypttab. So if
551
argument was empty, we ignore it silently. */
552
if(arg[0] == '\0'){
553
break;
554
}
485
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
486
break;
487
case ARGP_KEY_END:
488
break;
555
489
default:
556
490
return ARGP_ERR_UNKNOWN;
557
491
}
558
return errno; /* Set to 0 at start */
492
return 0;
559
493
}
560
494
561
495
/* This option parser is the same as parse_opt() above, except it
562
496
ignores everything but the --config-file option. */
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
error_t parse_opt_config_file (int key, char *arg,
498
__attribute__((unused))
499
struct argp_state *state) {
500
switch (key) {
568
501
case 'g': /* --global-options */
569
502
case 'G': /* --global-env */
570
503
case 'o': /* --options-for */
574
507
case 128: /* --plugin-dir */
575
508
break;
576
509
case 129: /* --config-file */
577
free(argfile);
578
510
argfile = strdup(arg);
579
break;
511
if(argfile == NULL){
512
perror("strdup");
513
}
514
break;
580
515
case 130: /* --userid */
581
516
case 131: /* --groupid */
582
517
case 132: /* --debug */
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
586
518
case ARGP_KEY_ARG:
519
case ARGP_KEY_END:
587
520
break;
588
521
default:
589
522
return ARGP_ERR_UNKNOWN;
590
523
}
591
return errno;
524
return 0;
592
525
}
593
526
594
527
struct argp argp = { .options = options,
596
529
.args_doc = "",
597
530
.doc = "Mandos plugin runner -- Run plugins" };
598
531
599
/* Parse using parse_opt_config_file() in order to get the custom
532
/* Parse using the parse_opt_config_file in order to get the custom
600
533
config file location, if any. */
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;
534
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
535
if (ret == ARGP_ERR_UNKNOWN){
536
fprintf(stderr, "Unknown error while parsing arguments\n");
537
exitstatus = EXIT_FAILURE;
615
538
goto fallback;
616
539
}
617
540
619
542
argp.parser = parse_opt;
620
543
621
544
/* Open the configfile if available */
622
if(argfile == NULL){
545
if (argfile == NULL){
623
546
conffp = fopen(AFILE, "r");
624
547
} else {
625
548
conffp = fopen(argfile, "r");
626
}
549
}
627
550
if(conffp != NULL){
628
551
char *org_line = NULL;
629
552
char *p, *arg, *new_arg, *line;
630
553
size_t size = 0;
554
ssize_t sret;
631
555
const char whitespace_delims[] = " \r\t\f\v\n";
632
556
const char comment_delim[] = "#";
633
557
634
558
custom_argc = 1;
635
559
custom_argv = malloc(sizeof(char*) * 2);
636
560
if(custom_argv == NULL){
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
561
perror("malloc");
562
exitstatus = EXIT_FAILURE;
639
563
goto fallback;
640
564
}
641
565
custom_argv[0] = argv[0];
642
566
custom_argv[1] = NULL;
643
567
644
568
/* for each line in the config file, strip whitespace and ignore
645
569
commented text */
646
570
while(true){
648
572
if(sret == -1){
649
573
break;
650
574
}
651
575
652
576
line = org_line;
653
577
arg = strsep(&line, comment_delim);
654
578
while((p = strsep(&arg, whitespace_delims)) != NULL){
657
581
}
658
582
new_arg = strdup(p);
659
583
if(new_arg == NULL){
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
584
perror("strdup");
585
exitstatus = EXIT_FAILURE;
662
586
free(org_line);
663
587
goto fallback;
664
588
}
667
591
custom_argv = realloc(custom_argv, sizeof(char *)
668
592
* ((unsigned int) custom_argc + 1));
669
593
if(custom_argv == NULL){
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
594
perror("realloc");
595
exitstatus = EXIT_FAILURE;
672
596
free(org_line);
673
597
goto fallback;
674
598
}
675
599
custom_argv[custom_argc-1] = new_arg;
676
custom_argv[custom_argc] = NULL;
600
custom_argv[custom_argc] = NULL;
677
601
}
678
602
}
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
}
687
603
free(org_line);
688
604
} else {
689
605
/* Check for harmful errors and go to fallback. Other errors might
690
606
not affect opening plugins */
691
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
607
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
608
perror("fopen");
609
exitstatus = EXIT_FAILURE;
694
610
goto fallback;
695
611
}
696
612
}
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
613
/* If there was any arguments from configuration file,
614
pass them to parser as command arguments */
699
615
if(custom_argv != NULL){
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;
616
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
617
0, NULL);
618
if (ret == ARGP_ERR_UNKNOWN){
619
fprintf(stderr, "Unknown error while parsing arguments\n");
620
exitstatus = EXIT_FAILURE;
714
621
goto fallback;
715
622
}
716
623
}
717
624
718
625
/* Parse actual command line arguments, to let them override the
719
626
config file */
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;
627
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
628
if (ret == ARGP_ERR_UNKNOWN){
629
fprintf(stderr, "Unknown error while parsing arguments\n");
630
exitstatus = EXIT_FAILURE;
734
631
goto fallback;
735
632
}
736
633
741
638
for(char **a = p->argv; *a != NULL; a++){
742
639
fprintf(stderr, "\tArg: %s\n", *a);
743
640
}
744
fprintf(stderr, "...and %d environment variables\n", p->envc);
641
fprintf(stderr, "...and %u environment variables\n", p->envc);
745
642
for(char **a = p->environ; *a != NULL; a++){
746
643
fprintf(stderr, "\t%s\n", *a);
747
644
}
748
645
}
749
646
}
750
647
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
}
648
/* Strip permissions down to nobody */
778
649
ret = setuid(uid);
779
if(ret == -1){
780
error(0, errno, "setuid");
781
}
782
783
/* Open plugin directory with close_on_exec flag */
650
if (ret == -1){
651
perror("setuid");
652
}
653
setgid(gid);
654
if (ret == -1){
655
perror("setgid");
656
}
657
658
if (plugindir == NULL){
659
dir = opendir(PDIR);
660
} else {
661
dir = opendir(plugindir);
662
}
663
664
if(dir == NULL){
665
perror("Could not open plugin dir");
666
exitstatus = EXIT_FAILURE;
667
goto fallback;
668
}
669
670
/* Set the FD_CLOEXEC flag on the directory, if possible */
784
671
{
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;
672
int dir_fd = dirfd(dir);
673
if(dir_fd >= 0){
674
ret = set_cloexec_flag(dir_fd);
675
if(ret < 0){
676
perror("set_cloexec_flag");
677
exitstatus = EXIT_FAILURE;
678
goto fallback;
679
}
826
680
}
827
681
}
828
682
830
684
831
685
/* Read and execute any executable in the plugin directory*/
832
686
while(true){
833
do {
834
dirst = readdir(dir);
835
} while(dirst == NULL and errno == EINTR);
687
dirst = readdir(dir);
836
688
837
689
/* All directory entries have been processed */
838
690
if(dirst == NULL){
839
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
691
if (errno == EBADF){
692
perror("readdir");
693
exitstatus = EXIT_FAILURE;
842
694
goto fallback;
843
695
}
844
696
break;
850
702
{
851
703
bool bad_name = false;
852
704
853
const char * const bad_prefixes[] = { ".", "#", NULL };
705
const char const *bad_prefixes[] = { ".", "#", NULL };
854
706
855
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
707
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
856
708
".dpkg-old",
857
".dpkg-bak",
858
709
".dpkg-divert", NULL };
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
710
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
864
711
size_t pre_len = strlen(*pre);
865
712
if((d_name_len >= pre_len)
866
713
and strncmp((dirst->d_name), *pre, pre_len) == 0){
875
722
if(bad_name){
876
723
continue;
877
724
}
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
725
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
883
726
size_t suf_len = strlen(*suf);
884
727
if((d_name_len >= suf_len)
885
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
728
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
886
729
== 0)){
887
730
if(debug){
888
731
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
897
740
continue;
898
741
}
899
742
}
900
743
901
744
char *filename;
902
745
if(plugindir == NULL){
903
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
904
dirst->d_name));
746
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
905
747
} else {
906
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
907
plugindir,
908
dirst->d_name));
748
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
909
749
}
910
750
if(ret < 0){
911
error(0, errno, "asprintf");
751
perror("asprintf");
912
752
continue;
913
753
}
914
754
915
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
916
if(ret == -1){
917
error(0, errno, "stat");
755
ret = stat(filename, &st);
756
if (ret == -1){
757
perror("stat");
918
758
free(filename);
919
759
continue;
920
760
}
921
761
922
762
/* Ignore non-executable files */
923
if(not S_ISREG(st.st_mode)
924
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
763
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
925
764
if(debug){
926
765
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
927
766
" with bad type or mode\n", filename);
932
771
933
772
plugin *p = getplugin(dirst->d_name);
934
773
if(p == NULL){
935
error(0, errno, "getplugin");
774
perror("getplugin");
936
775
free(filename);
937
776
continue;
938
777
}
950
789
if(g != NULL){
951
790
for(char **a = g->argv + 1; *a != NULL; a++){
952
791
if(not add_argument(p, *a)){
953
error(0, errno, "add_argument");
792
perror("add_argument");
954
793
}
955
794
}
956
795
/* Add global environment variables */
957
796
for(char **e = g->environ; *e != NULL; e++){
958
797
if(not add_environment(p, *e, false)){
959
error(0, errno, "add_environment");
798
perror("add_environment");
960
799
}
961
800
}
962
801
}
967
806
if(p->environ[0] != NULL){
968
807
for(char **e = environ; *e != NULL; e++){
969
808
if(not add_environment(p, *e, false)){
970
error(0, errno, "add_environment");
809
perror("add_environment");
971
810
}
972
811
}
973
812
}
974
813
975
814
int pipefd[2];
976
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
977
if(ret == -1){
978
error(0, errno, "pipe");
979
exitstatus = EX_OSERR;
815
ret = pipe(pipefd);
816
if (ret == -1){
817
perror("pipe");
818
exitstatus = EXIT_FAILURE;
980
819
goto fallback;
981
820
}
982
821
/* Ask OS to automatic close the pipe on exec */
983
822
ret = set_cloexec_flag(pipefd[0]);
984
823
if(ret < 0){
985
error(0, errno, "set_cloexec_flag");
986
exitstatus = EX_OSERR;
824
perror("set_cloexec_flag");
825
exitstatus = EXIT_FAILURE;
987
826
goto fallback;
988
827
}
989
828
ret = set_cloexec_flag(pipefd[1]);
990
829
if(ret < 0){
991
error(0, errno, "set_cloexec_flag");
992
exitstatus = EX_OSERR;
830
perror("set_cloexec_flag");
831
exitstatus = EXIT_FAILURE;
993
832
goto fallback;
994
833
}
995
834
/* Block SIGCHLD until process is safely in process list */
996
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
997
&sigchld_action.sa_mask,
998
NULL));
835
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
999
836
if(ret < 0){
1000
error(0, errno, "sigprocmask");
1001
exitstatus = EX_OSERR;
837
perror("sigprocmask");
838
exitstatus = EXIT_FAILURE;
1002
839
goto fallback;
1003
840
}
1004
841
/* Starting a new process to be watched */
1005
pid_t pid;
1006
do {
1007
pid = fork();
1008
} while(pid == -1 and errno == EINTR);
842
pid_t pid = fork();
1009
843
if(pid == -1){
1010
error(0, errno, "fork");
1011
exitstatus = EX_OSERR;
844
perror("fork");
845
exitstatus = EXIT_FAILURE;
1012
846
goto fallback;
1013
847
}
1014
848
if(pid == 0){
1015
849
/* this is the child process */
1016
850
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1017
851
if(ret < 0){
1018
error(0, errno, "sigaction");
1019
_exit(EX_OSERR);
852
perror("sigaction");
853
_exit(EXIT_FAILURE);
1020
854
}
1021
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
855
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1022
856
if(ret < 0){
1023
error(0, errno, "sigprocmask");
1024
_exit(EX_OSERR);
857
perror("sigprocmask");
858
_exit(EXIT_FAILURE);
1025
859
}
1026
860
1027
861
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1028
862
if(ret == -1){
1029
error(0, errno, "dup2");
1030
_exit(EX_OSERR);
863
perror("dup2");
864
_exit(EXIT_FAILURE);
1031
865
}
1032
866
1033
867
if(dirfd(dir) < 0){
1037
871
}
1038
872
if(p->environ[0] == NULL){
1039
873
if(execv(filename, p->argv) < 0){
1040
error(0, errno, "execv for %s", filename);
1041
_exit(EX_OSERR);
874
perror("execv");
875
_exit(EXIT_FAILURE);
1042
876
}
1043
877
} else {
1044
878
if(execve(filename, p->argv, p->environ) < 0){
1045
error(0, errno, "execve for %s", filename);
1046
_exit(EX_OSERR);
879
perror("execve");
880
_exit(EXIT_FAILURE);
1047
881
}
1048
882
}
1049
883
/* no return */
1050
884
}
1051
885
/* Parent process */
1052
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1053
pipe */
886
close(pipefd[1]); /* Close unused write end of pipe */
1054
887
free(filename);
1055
888
plugin *new_plugin = getplugin(dirst->d_name);
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
if (new_plugin == NULL){
890
perror("getplugin");
891
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1061
892
if(ret < 0){
1062
error(0, errno, "sigprocmask");
893
perror("sigprocmask");
1063
894
}
1064
exitstatus = EX_OSERR;
895
exitstatus = EXIT_FAILURE;
1065
896
goto fallback;
1066
897
}
1067
898
1070
901
1071
902
/* Unblock SIGCHLD so signal handler can be run if this process
1072
903
has already completed */
1073
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1074
&sigchld_action.sa_mask,
1075
NULL));
904
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1076
905
if(ret < 0){
1077
error(0, errno, "sigprocmask");
1078
exitstatus = EX_OSERR;
906
perror("sigprocmask");
907
exitstatus = EXIT_FAILURE;
1079
908
goto fallback;
1080
909
}
1081
910
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
911
FD_SET(new_plugin->fd, &rfds_all);
1096
912
1097
if(maxfd < new_plugin->fd){
913
if (maxfd < new_plugin->fd){
1098
914
maxfd = new_plugin->fd;
1099
915
}
916
1100
917
}
1101
918
1102
TEMP_FAILURE_RETRY(closedir(dir));
919
closedir(dir);
1103
920
dir = NULL;
1104
free_plugin(getplugin(NULL));
1105
921
1106
922
for(plugin *p = plugin_list; p != NULL; p = p->next){
1107
923
if(p->pid != 0){
1108
924
break;
1113
929
free_plugin_list();
1114
930
}
1115
931
}
1116
932
1117
933
/* Main loop while running plugins exist */
1118
934
while(plugin_list){
1119
935
fd_set rfds = rfds_all;
1120
936
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1121
if(select_ret == -1 and errno != EINTR){
1122
error(0, errno, "select");
1123
exitstatus = EX_OSERR;
937
if (select_ret == -1){
938
perror("select");
939
exitstatus = EXIT_FAILURE;
1124
940
goto fallback;
1125
941
}
1126
942
/* OK, now either a process completed, or something can be read
1127
943
from one of them */
1128
for(plugin *proc = plugin_list; proc != NULL;){
944
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1129
945
/* Is this process completely done? */
1130
if(proc->completed and proc->eof){
946
if(proc->eof and proc->completed){
1131
947
/* Only accept the plugin output if it exited cleanly */
1132
948
if(not WIFEXITED(proc->status)
1133
949
or WEXITSTATUS(proc->status) != 0){
1134
950
/* Bad exit by plugin */
1135
951
1136
952
if(debug){
1137
953
if(WIFEXITED(proc->status)){
1138
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1139
" status %d\n", proc->name,
1140
(intmax_t) (proc->pid),
954
fprintf(stderr, "Plugin %u exited with status %d\n",
955
(unsigned int) (proc->pid),
1141
956
WEXITSTATUS(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)));
957
} else if(WIFSIGNALED(proc->status)) {
958
fprintf(stderr, "Plugin %u killed by signal %d\n",
959
(unsigned int) (proc->pid),
960
WTERMSIG(proc->status));
1148
961
} else if(WCOREDUMP(proc->status)){
1149
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1150
" core\n", proc->name, (intmax_t) (proc->pid));
962
fprintf(stderr, "Plugin %d dumped core\n",
963
(unsigned int) (proc->pid));
1151
964
}
1152
965
}
1153
966
1154
967
/* Remove the plugin */
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
968
FD_CLR(proc->fd, &rfds_all);
969
1170
970
/* Block signal while modifying process_list */
1171
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1172
(SIG_BLOCK,
1173
&sigchld_action.sa_mask,
1174
NULL));
971
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1175
972
if(ret < 0){
1176
error(0, errno, "sigprocmask");
1177
exitstatus = EX_OSERR;
973
perror("sigprocmask");
974
exitstatus = EXIT_FAILURE;
1178
975
goto fallback;
1179
976
}
1180
1181
plugin *next_plugin = proc->next;
1182
977
free_plugin(proc);
1183
proc = next_plugin;
1184
1185
978
/* 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)));
979
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
980
NULL);
1189
981
if(ret < 0){
1190
error(0, errno, "sigprocmask");
1191
exitstatus = EX_OSERR;
982
perror("sigprocmask");
983
exitstatus = EXIT_FAILURE;
1192
984
goto fallback;
1193
985
}
1194
986
1195
987
if(plugin_list == NULL){
1196
988
break;
1197
989
}
1198
1199
990
continue;
1200
991
}
1201
992
1202
993
/* This process exited nicely, so print its buffer */
1203
994
1204
995
bool bret = print_out_password(proc->buffer,
1205
996
proc->buffer_length);
1206
997
if(not bret){
1207
error(0, errno, "print_out_password");
1208
exitstatus = EX_IOERR;
998
perror("print_out_password");
999
exitstatus = EXIT_FAILURE;
1209
1000
}
1210
1001
goto fallback;
1211
1002
}
1212
1003
1213
1004
/* This process has not completed. Does it have any output? */
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
1005
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1231
1006
/* This process had nothing to say at this time */
1232
proc = proc->next;
1233
1007
continue;
1234
1008
}
1235
1009
/* Before reading, make the process' data buffer large enough */
1236
1010
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1237
1011
proc->buffer = realloc(proc->buffer, proc->buffer_size
1238
1012
+ (size_t) BUFFER_SIZE);
1239
if(proc->buffer == NULL){
1240
error(0, errno, "malloc");
1241
exitstatus = EX_OSERR;
1013
if (proc->buffer == NULL){
1014
perror("malloc");
1015
exitstatus = EXIT_FAILURE;
1242
1016
goto fallback;
1243
1017
}
1244
1018
proc->buffer_size += BUFFER_SIZE;
1245
1019
}
1246
1020
/* Read from the process */
1247
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1248
proc->buffer
1249
+ proc->buffer_length,
1250
BUFFER_SIZE));
1251
if(sret < 0){
1021
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1022
BUFFER_SIZE);
1023
if(ret < 0){
1252
1024
/* Read error from this process; ignore the error */
1253
proc = proc->next;
1254
1025
continue;
1255
1026
}
1256
if(sret == 0){
1027
if(ret == 0){
1257
1028
/* got EOF */
1258
1029
proc->eof = true;
1259
1030
} else {
1260
proc->buffer_length += (size_t) sret;
1031
proc->buffer_length += (size_t) ret;
1261
1032
}
1262
1033
}
1263
1034
}
1264
1265
1035
1036
1266
1037
fallback:
1267
1038
1268
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1269
and exitstatus != EX_OK)){
1039
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1270
1040
/* Fallback if all plugins failed, none are found or an error
1271
1041
occured */
1272
1042
bool bret;
1280
1050
}
1281
1051
bret = print_out_password(passwordbuffer, len);
1282
1052
if(not bret){
1283
error(0, errno, "print_out_password");
1284
exitstatus = EX_IOERR;
1053
perror("print_out_password");
1054
exitstatus = EXIT_FAILURE;
1285
1055
}
1286
1056
}
1287
1057
1288
1058
/* Restore old signal handler */
1289
1059
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1290
1060
if(ret == -1){
1291
error(0, errno, "sigaction");
1292
exitstatus = EX_OSERR;
1061
perror("sigaction");
1062
exitstatus = EXIT_FAILURE;
1293
1063
}
1294
1064
1295
1065
if(custom_argv != NULL){
1296
1066
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1297
1067
free(*arg);
1303
1073
closedir(dir);
1304
1074
}
1305
1075
1306
/* Kill the processes */
1076
/* Free the process list and kill the processes */
1307
1077
for(plugin *p = plugin_list; p != NULL; p = p->next){
1308
1078
if(p->pid != 0){
1309
1079
close(p->fd);
1310
1080
ret = kill(p->pid, SIGTERM);
1311
1081
if(ret == -1 and errno != ESRCH){
1312
1082
/* Set-uid proccesses might not get closed */
1313
error(0, errno, "kill");
1083
perror("kill");
1314
1084
}
1315
1085
}
1316
1086
}
1317
1087
1318
1088
/* Wait for any remaining child processes to terminate */
1319
do {
1089
do{
1320
1090
ret = wait(NULL);
1321
1091
} while(ret >= 0);
1322
1092
if(errno != ECHILD){
1323
error(0, errno, "wait");
1093
perror("wait");
1324
1094
}
1325
1095
1326
1096
free_plugin_list();
1327
1097
1328
1098
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0