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- Committer: Teddy Hogeborn
- Date: 2009-01-18 06:41:57 UTC
- mto: (24.1.127 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 249.
- Revision ID: teddy@fukt.bsnet.se-20090118064157-8o4oia1y0t8di0xj
* debian/mandos-client.lintian-overrides: Remove override for
unbreakable line in
plugin-runner manual page.
* plugin-runner.xml (EXAMPLES): Make long command line more breakable.
unbreakable line in
plugin-runner manual page.
* plugin-runner.xml (EXAMPLES): Make long command line more breakable.
- files removed:
- DBUS-API
- 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 © 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() */
67
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
75
68
76
69
#define BUFFER_SIZE 256
77
70
79
72
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
73
81
74
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
75
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
76
84
77
typedef struct plugin{
85
78
char *name; /* can be NULL or any plugin name */
88
81
char **environ;
89
82
int envc;
90
83
bool disabled;
91
84
92
85
/* Variables used for running processes*/
93
86
pid_t pid;
94
87
int fd;
96
89
size_t buffer_size;
97
90
size_t buffer_length;
98
91
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
92
volatile bool completed;
93
volatile int status;
101
94
struct plugin *next;
102
95
} plugin;
103
96
105
98
106
99
/* Gets an existing plugin based on name,
107
100
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
101
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
102
/* Check for exiting plugin with that name */
111
103
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
104
if((p->name == name)
113
105
or (p->name and name and (strcmp(p->name, name) == 0))){
115
107
}
116
108
}
117
109
/* Create a new plugin */
118
plugin *new_plugin = NULL;
119
do {
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
110
plugin *new_plugin = malloc(sizeof(plugin));
122
111
if(new_plugin == NULL){
123
112
return NULL;
124
113
}
125
114
char *copy_name = NULL;
126
115
if(name != NULL){
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
116
copy_name = strdup(name);
130
117
if(copy_name == NULL){
131
int e = errno;
132
118
free(new_plugin);
133
errno = e;
134
119
return NULL;
135
120
}
136
121
}
137
122
138
*new_plugin = (plugin){ .name = copy_name,
139
.argc = 1,
140
.disabled = false,
141
.next = plugin_list };
123
*new_plugin = (plugin) { .name = copy_name,
124
.argc = 1,
125
.disabled = false,
126
.next = plugin_list };
142
127
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
128
new_plugin->argv = malloc(sizeof(char *) * 2);
146
129
if(new_plugin->argv == NULL){
147
int e = errno;
148
130
free(copy_name);
149
131
free(new_plugin);
150
errno = e;
151
132
return NULL;
152
133
}
153
134
new_plugin->argv[0] = copy_name;
154
135
new_plugin->argv[1] = NULL;
155
136
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
137
new_plugin->environ = malloc(sizeof(char *));
159
138
if(new_plugin->environ == NULL){
160
int e = errno;
161
139
free(copy_name);
162
140
free(new_plugin->argv);
163
141
free(new_plugin);
164
errno = e;
165
142
return NULL;
166
143
}
167
144
new_plugin->environ[0] = NULL;
172
149
}
173
150
174
151
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
152
static bool add_to_char_array(const char *new, char ***array,
177
153
int *len){
178
154
/* Resize the pointed-to array to hold one more pointer */
179
char **new_array = NULL;
180
do {
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} while(new_array == NULL and errno == EINTR);
155
*array = realloc(*array, sizeof(char *)
156
* (size_t) ((*len) + 2));
184
157
/* Malloc check */
185
if(new_array == NULL){
158
if(*array == NULL){
186
159
return false;
187
160
}
188
*array = new_array;
189
161
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
162
char *copy = strdup(new);
194
163
if(copy == NULL){
195
164
return false;
196
165
}
203
172
}
204
173
205
174
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
175
static bool add_argument(plugin *p, const char *arg){
208
176
if(p == NULL){
209
177
return false;
212
180
}
213
181
214
182
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
183
static bool add_environment(plugin *p, const char *def, bool replace){
217
184
if(p == NULL){
218
185
return false;
220
187
/* namelen = length of name of environment variable */
221
188
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
189
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
190
for(char **e = p->environ; *e != NULL; e++){
191
if(strncmp(*e, def, namelen + 1) == 0){
225
192
/* It already exists */
226
193
if(replace){
227
char *new_envdef;
228
do {
229
new_envdef = realloc(*envdef, strlen(def) + 1);
230
} while(new_envdef == NULL and errno == EINTR);
231
if(new_envdef == NULL){
194
char *new = realloc(*e, strlen(def) + 1);
195
if(new == NULL){
232
196
return false;
233
197
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
198
*e = new;
199
strcpy(*e, def);
236
200
}
237
201
return true;
238
202
}
243
207
/*
244
208
* Based on the example in the GNU LibC manual chapter 13.13 "File
245
209
* Descriptor Flags".
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
210
* *Note File Descriptor Flags:(libc)Descriptor Flags.
247
211
*/
248
__attribute__((warn_unused_result))
249
212
static int set_cloexec_flag(int fd){
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
213
int ret = fcntl(fd, F_GETFD, 0);
251
214
/* If reading the flags failed, return error indication now. */
252
215
if(ret < 0){
253
216
return ret;
254
217
}
255
218
/* Store modified flag word in the descriptor. */
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
257
ret | FD_CLOEXEC));
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
220
}
259
221
260
222
261
223
/* Mark processes as completed when they exit, and save their exit
262
224
status. */
263
225
static void handle_sigchld(__attribute__((unused)) int sig){
264
int old_errno = errno;
265
226
while(true){
266
227
plugin *proc = plugin_list;
267
228
int status;
271
232
break;
272
233
}
273
234
if(pid == -1){
274
if(errno == ECHILD){
275
/* No child processes */
276
break;
235
if(errno != ECHILD){
236
perror("waitpid");
277
237
}
278
error(0, errno, "waitpid");
238
/* No child processes */
239
break;
279
240
}
280
241
281
242
/* A child exited, find it in process_list */
287
248
continue;
288
249
}
289
250
proc->status = status;
290
proc->completed = 1;
251
proc->completed = true;
291
252
}
292
errno = old_errno;
293
253
}
294
254
295
255
/* Prints out a password to stdout */
296
__attribute__((nonnull, warn_unused_result))
297
256
static bool print_out_password(const char *buffer, size_t length){
298
257
ssize_t ret;
299
258
for(size_t written = 0; written < length; written += (size_t)ret){
307
266
}
308
267
309
268
/* Removes and free a plugin from the plugin list */
310
__attribute__((nonnull))
311
269
static void free_plugin(plugin *plugin_node){
312
270
313
271
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
319
277
}
320
278
free(plugin_node->environ);
321
279
free(plugin_node->buffer);
322
280
323
281
/* Removes the plugin from the singly-linked list */
324
282
if(plugin_node == plugin_list){
325
283
/* First one - simple */
352
310
struct dirent *dirst;
353
311
struct stat st;
354
312
fd_set rfds_all;
355
int ret, maxfd = 0;
313
int ret, numchars, maxfd = 0;
356
314
ssize_t sret;
315
intmax_t tmpmax;
357
316
uid_t uid = 65534;
358
317
gid_t gid = 65534;
359
318
bool debug = false;
368
327
sigemptyset(&sigchld_action.sa_mask);
369
328
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
370
329
if(ret == -1){
371
error(0, errno, "sigaddset");
372
exitstatus = EX_OSERR;
330
perror("sigaddset");
331
exitstatus = EXIT_FAILURE;
373
332
goto fallback;
374
333
}
375
334
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
376
335
if(ret == -1){
377
error(0, errno, "sigaction");
378
exitstatus = EX_OSERR;
336
perror("sigaction");
337
exitstatus = EXIT_FAILURE;
379
338
goto fallback;
380
339
}
381
340
413
372
.doc = "Group ID the plugins will run as", .group = 3 },
414
373
{ .name = "debug", .key = 132,
415
374
.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
375
{ .name = NULL }
426
376
};
427
377
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;
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state) {
380
switch(key) {
434
381
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;
382
if(arg != NULL){
383
char *p;
384
while((p = strsep(&arg, ",")) != NULL){
385
if(p[0] == '\0'){
386
continue;
387
}
388
if(not add_argument(getplugin(NULL), p)){
389
perror("add_argument");
390
return ARGP_ERR_UNKNOWN;
440
391
}
441
392
}
442
errno = 0;
443
393
}
444
394
break;
445
395
case 'G': /* --global-env */
446
if(add_environment(getplugin(NULL), arg, true)){
447
errno = 0;
396
if(arg == NULL){
397
break;
398
}
399
if(not add_environment(getplugin(NULL), arg, true)){
400
perror("add_environment");
448
401
}
449
402
break;
450
403
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;
404
if(arg != NULL){
405
char *p_name = strsep(&arg, ":");
406
if(p_name[0] == '\0' or arg == NULL){
407
break;
408
}
409
char *opt = strsep(&arg, ":");
410
if(opt[0] == '\0' or opt == NULL){
411
break;
412
}
413
char *p;
414
while((p = strsep(&opt, ",")) != NULL){
415
if(p[0] == '\0'){
416
continue;
417
}
418
if(not add_argument(getplugin(p_name), p)){
419
perror("add_argument");
420
return ARGP_ERR_UNKNOWN;
421
}
422
}
472
423
}
473
424
break;
474
425
case 'E': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
475
429
{
476
430
char *envdef = strchr(arg, ':');
477
431
if(envdef == NULL){
478
argp_error(state, "No colon in \"%s\"", arg);
479
errno = EINVAL;
480
432
break;
481
433
}
482
434
*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;
435
if(not add_environment(getplugin(arg), envdef+1, true)){
436
perror("add_environment");
491
437
}
492
438
}
493
439
break;
494
440
case 'd': /* --disable */
495
{
441
if(arg != NULL){
496
442
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = true;
499
errno = 0;
443
if(p == NULL){
444
return ARGP_ERR_UNKNOWN;
500
445
}
446
p->disabled = true;
501
447
}
502
448
break;
503
449
case 'e': /* --enable */
504
{
450
if(arg != NULL){
505
451
plugin *p = getplugin(arg);
506
if(p != NULL){
507
p->disabled = false;
508
errno = 0;
452
if(p == NULL){
453
return ARGP_ERR_UNKNOWN;
509
454
}
455
p->disabled = false;
510
456
}
511
457
break;
512
458
case 128: /* --plugin-dir */
513
459
free(plugindir);
514
460
plugindir = strdup(arg);
515
if(plugindir != NULL){
516
errno = 0;
517
}
461
if(plugindir == NULL){
462
perror("strdup");
463
}
518
464
break;
519
465
case 129: /* --config-file */
520
466
/* This is already done by parse_opt_config_file() */
521
467
break;
522
468
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;
469
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
470
if(ret < 1 or tmpmax != (uid_t)tmpmax
471
or arg[numchars] != '\0'){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
529
476
}
530
uid = (uid_t)tmp_id;
531
errno = 0;
532
477
break;
533
478
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;
479
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
480
if(ret < 1 or tmpmax != (gid_t)tmpmax
481
or arg[numchars] != '\0'){
482
fprintf(stderr, "Bad group ID number: \"%s\", using %"
483
PRIdMAX "\n", arg, (intmax_t)gid);
484
} else {
485
gid = (gid_t)tmpmax;
540
486
}
541
gid = (gid_t)tmp_id;
542
errno = 0;
543
487
break;
544
488
case 132: /* --debug */
545
489
debug = true;
546
490
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
491
/*
562
492
* When adding more options before this line, remember to also add a
563
493
* "case" to the "parse_opt_config_file" function below.
566
496
/* Cryptsetup always passes an argument, which is an empty
567
497
string if "none" was specified in /etc/crypttab. So if
568
498
argument was empty, we ignore it silently. */
569
if(arg[0] == '\0'){
570
break;
499
if(arg[0] != '\0'){
500
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
571
501
}
502
break;
503
case ARGP_KEY_END:
504
break;
572
505
default:
573
506
return ARGP_ERR_UNKNOWN;
574
507
}
575
return errno; /* Set to 0 at start */
508
return 0;
576
509
}
577
510
578
511
/* This option parser is the same as parse_opt() above, except it
579
512
ignores everything but the --config-file option. */
580
513
error_t parse_opt_config_file(int key, char *arg,
581
514
__attribute__((unused))
582
struct argp_state *state){
583
errno = 0;
584
switch(key){
515
struct argp_state *state) {
516
switch(key) {
585
517
case 'g': /* --global-options */
586
518
case 'G': /* --global-env */
587
519
case 'o': /* --options-for */
593
525
case 129: /* --config-file */
594
526
free(argfile);
595
527
argfile = strdup(arg);
596
if(argfile != NULL){
597
errno = 0;
528
if(argfile == NULL){
529
perror("strdup");
598
530
}
599
break;
531
break;
600
532
case 130: /* --userid */
601
533
case 131: /* --groupid */
602
534
case 132: /* --debug */
603
case '?': /* --help */
604
case -3: /* --usage */
605
case 'V': /* --version */
606
535
case ARGP_KEY_ARG:
536
case ARGP_KEY_END:
607
537
break;
608
538
default:
609
539
return ARGP_ERR_UNKNOWN;
610
540
}
611
return errno;
541
return 0;
612
542
}
613
543
614
544
struct argp argp = { .options = options,
618
548
619
549
/* Parse using parse_opt_config_file() in order to get the custom
620
550
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;
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
553
fprintf(stderr, "Unknown error while parsing arguments\n");
554
exitstatus = EXIT_FAILURE;
635
555
goto fallback;
636
556
}
637
557
643
563
conffp = fopen(AFILE, "r");
644
564
} else {
645
565
conffp = fopen(argfile, "r");
646
}
566
}
647
567
if(conffp != NULL){
648
568
char *org_line = NULL;
649
569
char *p, *arg, *new_arg, *line;
650
570
size_t size = 0;
651
571
const char whitespace_delims[] = " \r\t\f\v\n";
652
572
const char comment_delim[] = "#";
653
573
654
574
custom_argc = 1;
655
575
custom_argv = malloc(sizeof(char*) * 2);
656
576
if(custom_argv == NULL){
657
error(0, errno, "malloc");
658
exitstatus = EX_OSERR;
577
perror("malloc");
578
exitstatus = EXIT_FAILURE;
659
579
goto fallback;
660
580
}
661
581
custom_argv[0] = argv[0];
662
582
custom_argv[1] = NULL;
663
583
664
584
/* for each line in the config file, strip whitespace and ignore
665
585
commented text */
666
586
while(true){
668
588
if(sret == -1){
669
589
break;
670
590
}
671
591
672
592
line = org_line;
673
593
arg = strsep(&line, comment_delim);
674
594
while((p = strsep(&arg, whitespace_delims)) != NULL){
677
597
}
678
598
new_arg = strdup(p);
679
599
if(new_arg == NULL){
680
error(0, errno, "strdup");
681
exitstatus = EX_OSERR;
600
perror("strdup");
601
exitstatus = EXIT_FAILURE;
682
602
free(org_line);
683
603
goto fallback;
684
604
}
685
605
686
606
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
}
607
custom_argv = realloc(custom_argv, sizeof(char *)
608
* ((unsigned int) custom_argc + 1));
609
if(custom_argv == NULL){
610
perror("realloc");
611
exitstatus = EXIT_FAILURE;
612
free(org_line);
613
goto fallback;
700
614
}
701
615
custom_argv[custom_argc-1] = new_arg;
702
custom_argv[custom_argc] = NULL;
616
custom_argv[custom_argc] = NULL;
703
617
}
704
618
}
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
619
free(org_line);
714
620
} else {
715
621
/* Check for harmful errors and go to fallback. Other errors might
716
622
not affect opening plugins */
717
623
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
624
perror("fopen");
625
exitstatus = EXIT_FAILURE;
720
626
goto fallback;
721
627
}
722
628
}
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
629
/* If there was any arguments from configuration file,
630
pass them to parser as command arguments */
725
631
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;
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
633
0, NULL);
634
if(ret == ARGP_ERR_UNKNOWN){
635
fprintf(stderr, "Unknown error while parsing arguments\n");
636
exitstatus = EXIT_FAILURE;
740
637
goto fallback;
741
638
}
742
639
}
743
640
744
641
/* Parse actual command line arguments, to let them override the
745
642
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;
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
645
fprintf(stderr, "Unknown error while parsing arguments\n");
646
exitstatus = EXIT_FAILURE;
760
647
goto fallback;
761
648
}
762
649
774
661
}
775
662
}
776
663
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
}
664
/* Strip permissions down to nobody */
804
665
ret = setuid(uid);
805
666
if(ret == -1){
806
error(0, errno, "setuid");
807
}
808
809
/* Open plugin directory with close_on_exec flag */
667
perror("setuid");
668
}
669
setgid(gid);
670
if(ret == -1){
671
perror("setgid");
672
}
673
674
if(plugindir == NULL){
675
dir = opendir(PDIR);
676
} else {
677
dir = opendir(plugindir);
678
}
679
680
if(dir == NULL){
681
perror("Could not open plugin dir");
682
exitstatus = EXIT_FAILURE;
683
goto fallback;
684
}
685
686
/* Set the FD_CLOEXEC flag on the directory, if possible */
810
687
{
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;
688
int dir_fd = dirfd(dir);
689
if(dir_fd >= 0){
690
ret = set_cloexec_flag(dir_fd);
691
if(ret < 0){
692
perror("set_cloexec_flag");
693
exitstatus = EXIT_FAILURE;
694
goto fallback;
695
}
852
696
}
853
697
}
854
698
856
700
857
701
/* Read and execute any executable in the plugin directory*/
858
702
while(true){
859
do {
860
dirst = readdir(dir);
861
} while(dirst == NULL and errno == EINTR);
703
dirst = readdir(dir);
862
704
863
705
/* All directory entries have been processed */
864
706
if(dirst == NULL){
865
707
if(errno == EBADF){
866
error(0, errno, "readdir");
867
exitstatus = EX_IOERR;
708
perror("readdir");
709
exitstatus = EXIT_FAILURE;
868
710
goto fallback;
869
711
}
870
712
break;
876
718
{
877
719
bool bad_name = false;
878
720
879
const char * const bad_prefixes[] = { ".", "#", NULL };
721
const char const *bad_prefixes[] = { ".", "#", NULL };
880
722
881
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
723
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
882
724
".dpkg-old",
883
725
".dpkg-bak",
884
726
".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
727
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
894
728
size_t pre_len = strlen(*pre);
895
729
if((d_name_len >= pre_len)
896
730
and strncmp((dirst->d_name), *pre, pre_len) == 0){
905
739
if(bad_name){
906
740
continue;
907
741
}
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
742
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
917
743
size_t suf_len = strlen(*suf);
918
744
if((d_name_len >= suf_len)
919
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
745
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
920
746
== 0)){
921
747
if(debug){
922
748
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
931
757
continue;
932
758
}
933
759
}
934
760
935
761
char *filename;
936
762
if(plugindir == NULL){
937
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
938
dirst->d_name));
763
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
939
764
} else {
940
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
941
plugindir,
942
dirst->d_name));
765
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
943
766
}
944
767
if(ret < 0){
945
error(0, errno, "asprintf");
768
perror("asprintf");
946
769
continue;
947
770
}
948
771
949
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
772
ret = stat(filename, &st);
950
773
if(ret == -1){
951
error(0, errno, "stat");
774
perror("stat");
952
775
free(filename);
953
776
continue;
954
777
}
955
778
956
779
/* Ignore non-executable files */
957
if(not S_ISREG(st.st_mode)
958
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
780
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
959
781
if(debug){
960
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
961
783
" with bad type or mode\n", filename);
966
788
967
789
plugin *p = getplugin(dirst->d_name);
968
790
if(p == NULL){
969
error(0, errno, "getplugin");
791
perror("getplugin");
970
792
free(filename);
971
793
continue;
972
794
}
984
806
if(g != NULL){
985
807
for(char **a = g->argv + 1; *a != NULL; a++){
986
808
if(not add_argument(p, *a)){
987
error(0, errno, "add_argument");
809
perror("add_argument");
988
810
}
989
811
}
990
812
/* Add global environment variables */
991
813
for(char **e = g->environ; *e != NULL; e++){
992
814
if(not add_environment(p, *e, false)){
993
error(0, errno, "add_environment");
815
perror("add_environment");
994
816
}
995
817
}
996
818
}
1001
823
if(p->environ[0] != NULL){
1002
824
for(char **e = environ; *e != NULL; e++){
1003
825
if(not add_environment(p, *e, false)){
1004
error(0, errno, "add_environment");
826
perror("add_environment");
1005
827
}
1006
828
}
1007
829
}
1008
830
1009
831
int pipefd[2];
1010
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
832
ret = pipe(pipefd);
1011
833
if(ret == -1){
1012
error(0, errno, "pipe");
1013
exitstatus = EX_OSERR;
834
perror("pipe");
835
exitstatus = EXIT_FAILURE;
1014
836
goto fallback;
1015
837
}
1016
838
/* Ask OS to automatic close the pipe on exec */
1017
839
ret = set_cloexec_flag(pipefd[0]);
1018
840
if(ret < 0){
1019
error(0, errno, "set_cloexec_flag");
1020
exitstatus = EX_OSERR;
841
perror("set_cloexec_flag");
842
exitstatus = EXIT_FAILURE;
1021
843
goto fallback;
1022
844
}
1023
845
ret = set_cloexec_flag(pipefd[1]);
1024
846
if(ret < 0){
1025
error(0, errno, "set_cloexec_flag");
1026
exitstatus = EX_OSERR;
847
perror("set_cloexec_flag");
848
exitstatus = EXIT_FAILURE;
1027
849
goto fallback;
1028
850
}
1029
851
/* 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));
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1033
853
if(ret < 0){
1034
error(0, errno, "sigprocmask");
1035
exitstatus = EX_OSERR;
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
1036
856
goto fallback;
1037
857
}
1038
858
/* Starting a new process to be watched */
1039
pid_t pid;
1040
do {
1041
pid = fork();
1042
} while(pid == -1 and errno == EINTR);
859
pid_t pid = fork();
1043
860
if(pid == -1){
1044
error(0, errno, "fork");
1045
exitstatus = EX_OSERR;
861
perror("fork");
862
exitstatus = EXIT_FAILURE;
1046
863
goto fallback;
1047
864
}
1048
865
if(pid == 0){
1049
866
/* this is the child process */
1050
867
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1051
868
if(ret < 0){
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
869
perror("sigaction");
870
_exit(EXIT_FAILURE);
1054
871
}
1055
872
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1056
873
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
874
perror("sigprocmask");
875
_exit(EXIT_FAILURE);
1059
876
}
1060
877
1061
878
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1062
879
if(ret == -1){
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
880
perror("dup2");
881
_exit(EXIT_FAILURE);
1065
882
}
1066
883
1067
884
if(dirfd(dir) < 0){
1071
888
}
1072
889
if(p->environ[0] == NULL){
1073
890
if(execv(filename, p->argv) < 0){
1074
error(0, errno, "execv for %s", filename);
1075
_exit(EX_OSERR);
891
perror("execv");
892
_exit(EXIT_FAILURE);
1076
893
}
1077
894
} else {
1078
895
if(execve(filename, p->argv, p->environ) < 0){
1079
error(0, errno, "execve for %s", filename);
1080
_exit(EX_OSERR);
896
perror("execve");
897
_exit(EXIT_FAILURE);
1081
898
}
1082
899
}
1083
900
/* no return */
1084
901
}
1085
902
/* Parent process */
1086
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1087
pipe */
903
close(pipefd[1]); /* Close unused write end of pipe */
1088
904
free(filename);
1089
905
plugin *new_plugin = getplugin(dirst->d_name);
1090
906
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)));
907
perror("getplugin");
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1095
909
if(ret < 0){
1096
error(0, errno, "sigprocmask");
910
perror("sigprocmask");
1097
911
}
1098
exitstatus = EX_OSERR;
912
exitstatus = EXIT_FAILURE;
1099
913
goto fallback;
1100
914
}
1101
915
1104
918
1105
919
/* Unblock SIGCHLD so signal handler can be run if this process
1106
920
has already completed */
1107
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1108
&sigchld_action.sa_mask,
1109
NULL));
921
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1110
922
if(ret < 0){
1111
error(0, errno, "sigprocmask");
1112
exitstatus = EX_OSERR;
923
perror("sigprocmask");
924
exitstatus = EXIT_FAILURE;
1113
925
goto fallback;
1114
926
}
1115
927
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
928
FD_SET(new_plugin->fd, &rfds_all);
1130
929
1131
930
if(maxfd < new_plugin->fd){
1132
931
maxfd = new_plugin->fd;
1133
932
}
1134
933
}
1135
934
1136
TEMP_FAILURE_RETRY(closedir(dir));
935
closedir(dir);
1137
936
dir = NULL;
1138
free_plugin(getplugin(NULL));
1139
937
1140
938
for(plugin *p = plugin_list; p != NULL; p = p->next){
1141
939
if(p->pid != 0){
1152
950
while(plugin_list){
1153
951
fd_set rfds = rfds_all;
1154
952
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;
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1158
956
goto fallback;
1159
957
}
1160
958
/* OK, now either a process completed, or something can be read
1161
959
from one of them */
1162
960
for(plugin *proc = plugin_list; proc != NULL;){
1163
961
/* Is this process completely done? */
1164
if(proc->completed and proc->eof){
962
if(proc->eof and proc->completed){
1165
963
/* Only accept the plugin output if it exited cleanly */
1166
964
if(not WIFEXITED(proc->status)
1167
965
or WEXITSTATUS(proc->status) != 0){
1168
966
/* Bad exit by plugin */
1169
967
1170
968
if(debug){
1171
969
if(WIFEXITED(proc->status)){
1172
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1173
" status %d\n", proc->name,
1174
(intmax_t) (proc->pid),
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %d\n", (intmax_t) (proc->pid),
1175
972
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)));
973
} else if(WIFSIGNALED(proc->status)) {
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
976
WTERMSIG(proc->status));
1182
977
} else if(WCOREDUMP(proc->status)){
1183
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1184
" core\n", proc->name, (intmax_t) (proc->pid));
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(intmax_t) (proc->pid));
1185
980
}
1186
981
}
1187
982
1188
983
/* 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
984
FD_CLR(proc->fd, &rfds_all);
985
1204
986
/* Block signal while modifying process_list */
1205
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1206
(SIG_BLOCK,
1207
&sigchld_action.sa_mask,
1208
NULL));
987
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1209
988
if(ret < 0){
1210
error(0, errno, "sigprocmask");
1211
exitstatus = EX_OSERR;
989
perror("sigprocmask");
990
exitstatus = EXIT_FAILURE;
1212
991
goto fallback;
1213
992
}
1214
993
1217
996
proc = next_plugin;
1218
997
1219
998
/* 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)));
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1000
NULL);
1223
1001
if(ret < 0){
1224
error(0, errno, "sigprocmask");
1225
exitstatus = EX_OSERR;
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1226
1004
goto fallback;
1227
1005
}
1228
1006
1238
1016
bool bret = print_out_password(proc->buffer,
1239
1017
proc->buffer_length);
1240
1018
if(not bret){
1241
error(0, errno, "print_out_password");
1242
exitstatus = EX_IOERR;
1019
perror("print_out_password");
1020
exitstatus = EXIT_FAILURE;
1243
1021
}
1244
1022
goto fallback;
1245
1023
}
1246
1024
1247
1025
/* 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
1026
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1265
1027
/* This process had nothing to say at this time */
1266
1028
proc = proc->next;
1267
1029
continue;
1268
1030
}
1269
1031
/* Before reading, make the process' data buffer large enough */
1270
1032
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;
1033
proc->buffer = realloc(proc->buffer, proc->buffer_size
1034
+ (size_t) BUFFER_SIZE);
1035
if(proc->buffer == NULL){
1036
perror("malloc");
1037
exitstatus = EXIT_FAILURE;
1276
1038
goto fallback;
1277
1039
}
1278
proc->buffer = new_buffer;
1279
1040
proc->buffer_size += BUFFER_SIZE;
1280
1041
}
1281
1042
/* Read from the process */
1282
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1283
proc->buffer
1284
+ proc->buffer_length,
1285
BUFFER_SIZE));
1043
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1044
BUFFER_SIZE);
1286
1045
if(sret < 0){
1287
1046
/* Read error from this process; ignore the error */
1288
1047
proc = proc->next;
1296
1055
}
1297
1056
}
1298
1057
}
1299
1300
1058
1059
1301
1060
fallback:
1302
1061
1303
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1304
and exitstatus != EX_OK)){
1062
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1305
1063
/* Fallback if all plugins failed, none are found or an error
1306
1064
occured */
1307
1065
bool bret;
1315
1073
}
1316
1074
bret = print_out_password(passwordbuffer, len);
1317
1075
if(not bret){
1318
error(0, errno, "print_out_password");
1319
exitstatus = EX_IOERR;
1076
perror("print_out_password");
1077
exitstatus = EXIT_FAILURE;
1320
1078
}
1321
1079
}
1322
1080
1323
1081
/* Restore old signal handler */
1324
1082
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1325
1083
if(ret == -1){
1326
error(0, errno, "sigaction");
1327
exitstatus = EX_OSERR;
1084
perror("sigaction");
1085
exitstatus = EXIT_FAILURE;
1328
1086
}
1329
1087
1330
1088
if(custom_argv != NULL){
1345
1103
ret = kill(p->pid, SIGTERM);
1346
1104
if(ret == -1 and errno != ESRCH){
1347
1105
/* Set-uid proccesses might not get closed */
1348
error(0, errno, "kill");
1106
perror("kill");
1349
1107
}
1350
1108
}
1351
1109
}
1352
1110
1353
1111
/* Wait for any remaining child processes to terminate */
1354
do {
1112
do{
1355
1113
ret = wait(NULL);
1356
1114
} while(ret >= 0);
1357
1115
if(errno != ECHILD){
1358
error(0, errno, "wait");
1116
perror("wait");
1359
1117
}
1360
1118
1361
1119
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0