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- Committer: Teddy Hogeborn
- Date: 2009-01-04 22:15:01 UTC
- mto: (24.1.120 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 238.
- Revision ID: teddy@fukt.bsnet.se-20090104221501-23vutw4cnmb575rq
* debian/mandos.README.Debian: Updated to reflect code changes.
- files added:
- debian/mandos-client.config
- files removed:
- DBUS-API
- debian/source
- network-hooks.d
- files renamed:
- mandos-ctl => mandos-list
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 Björn Påhlsson
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), getgid(),
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
WEXITSTATUS() */
43
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
45
readdir(), closedir(), dirfd() */
47
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
47
fcntl(), setuid(), setgid(),
53
52
close() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
54
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
#include <string.h> /* strsep, strlen(), asprintf() */
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
64
62
#include <signal.h> /* struct sigaction, sigemptyset(),
65
63
sigaddset(), sigaction(),
66
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
SIG_UNBLOCK, kill() */
69
66
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
75
67
76
68
#define BUFFER_SIZE 256
77
69
79
71
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
72
81
73
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
75
84
76
typedef struct plugin{
85
77
char *name; /* can be NULL or any plugin name */
88
80
char **environ;
89
81
int envc;
90
82
bool disabled;
91
83
92
84
/* Variables used for running processes*/
93
85
pid_t pid;
94
86
int fd;
96
88
size_t buffer_size;
97
89
size_t buffer_length;
98
90
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
91
volatile bool completed;
92
volatile int status;
101
93
struct plugin *next;
102
94
} plugin;
103
95
106
98
/* Gets an existing plugin based on name,
107
99
or if none is found, creates a new one */
108
100
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))){
101
/* Check for exiting plugin with that name */
102
for (plugin *p = plugin_list; p != NULL; p = p->next){
103
if ((p->name == name)
104
or (p->name and name and (strcmp(p->name, name) == 0))){
113
105
return p;
114
106
}
115
107
}
116
108
/* 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){
109
plugin *new_plugin = malloc(sizeof(plugin));
110
if (new_plugin == NULL){
122
111
return NULL;
123
112
}
124
113
char *copy_name = NULL;
125
114
if(name != NULL){
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
115
copy_name = strdup(name);
129
116
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
133
117
return NULL;
134
118
}
135
119
}
136
120
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
141
125
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;
126
new_plugin->argv = malloc(sizeof(char *) * 2);
127
if (new_plugin->argv == NULL){
147
128
free(copy_name);
148
129
free(new_plugin);
149
errno = e;
150
130
return NULL;
151
131
}
152
132
new_plugin->argv[0] = copy_name;
153
133
new_plugin->argv[1] = NULL;
154
134
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
135
new_plugin->environ = malloc(sizeof(char *));
158
136
if(new_plugin->environ == NULL){
159
int e = errno;
160
137
free(copy_name);
161
138
free(new_plugin->argv);
162
139
free(new_plugin);
163
errno = e;
164
140
return NULL;
165
141
}
166
142
new_plugin->environ[0] = NULL;
171
147
}
172
148
173
149
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
175
150
static bool add_to_char_array(const char *new, char ***array,
176
151
int *len){
177
152
/* Resize the pointed-to array to hold one more pointer */
178
char **new_array = NULL;
179
do {
180
new_array = realloc(*array, sizeof(char *)
181
* (size_t) ((*len) + 2));
182
} while(new_array == NULL and errno == EINTR);
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
183
155
/* Malloc check */
184
if(new_array == NULL){
156
if(*array == NULL){
185
157
return false;
186
158
}
187
*array = new_array;
188
159
/* Make a copy of the new string */
189
char *copy;
190
do {
191
copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
160
char *copy = strdup(new);
193
161
if(copy == NULL){
194
162
return false;
195
163
}
202
170
}
203
171
204
172
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
206
173
static bool add_argument(plugin *p, const char *arg){
207
174
if(p == NULL){
208
175
return false;
211
178
}
212
179
213
180
/* Add to a plugin's environment */
214
__attribute__((nonnull(2)))
215
181
static bool add_environment(plugin *p, const char *def, bool replace){
216
182
if(p == NULL){
217
183
return false;
219
185
/* namelen = length of name of environment variable */
220
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
221
187
/* Search for this environment variable */
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
224
190
/* It already exists */
225
191
if(replace){
226
char *new_envdef;
227
do {
228
new_envdef = realloc(*envdef, strlen(def) + 1);
229
} while(new_envdef == NULL and errno == EINTR);
230
if(new_envdef == NULL){
192
char *new = realloc(*e, strlen(def) + 1);
193
if(new == NULL){
231
194
return false;
232
195
}
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
196
*e = new;
197
strcpy(*e, def);
235
198
}
236
199
return true;
237
200
}
242
205
/*
243
206
* Based on the example in the GNU LibC manual chapter 13.13 "File
244
207
* Descriptor Flags".
245
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
246
209
*/
247
210
static int set_cloexec_flag(int fd){
248
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
int ret = fcntl(fd, F_GETFD, 0);
249
212
/* If reading the flags failed, return error indication now. */
250
213
if(ret < 0){
251
214
return ret;
252
215
}
253
216
/* Store modified flag word in the descriptor. */
254
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
255
ret | FD_CLOEXEC));
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
256
218
}
257
219
258
220
259
221
/* Mark processes as completed when they exit, and save their exit
260
222
status. */
261
223
static void handle_sigchld(__attribute__((unused)) int sig){
262
int old_errno = errno;
263
224
while(true){
264
225
plugin *proc = plugin_list;
265
226
int status;
269
230
break;
270
231
}
271
232
if(pid == -1){
272
if(errno == ECHILD){
273
/* No child processes */
274
break;
233
if (errno != ECHILD){
234
perror("waitpid");
275
235
}
276
error(0, errno, "waitpid");
236
/* No child processes */
237
break;
277
238
}
278
239
279
240
/* A child exited, find it in process_list */
285
246
continue;
286
247
}
287
248
proc->status = status;
288
proc->completed = 1;
249
proc->completed = true;
289
250
}
290
errno = old_errno;
291
251
}
292
252
293
253
/* Prints out a password to stdout */
294
__attribute__((nonnull))
295
254
static bool print_out_password(const char *buffer, size_t length){
296
255
ssize_t ret;
297
256
for(size_t written = 0; written < length; written += (size_t)ret){
305
264
}
306
265
307
266
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
309
267
static void free_plugin(plugin *plugin_node){
310
268
311
269
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
317
275
}
318
276
free(plugin_node->environ);
319
277
free(plugin_node->buffer);
320
278
321
279
/* Removes the plugin from the singly-linked list */
322
280
if(plugin_node == plugin_list){
323
281
/* First one - simple */
351
309
struct stat st;
352
310
fd_set rfds_all;
353
311
int ret, maxfd = 0;
354
ssize_t sret;
355
312
uid_t uid = 65534;
356
313
gid_t gid = 65534;
357
314
bool debug = false;
366
323
sigemptyset(&sigchld_action.sa_mask);
367
324
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
368
325
if(ret == -1){
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
326
perror("sigaddset");
327
exitstatus = EXIT_FAILURE;
371
328
goto fallback;
372
329
}
373
330
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
374
331
if(ret == -1){
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
332
perror("sigaction");
333
exitstatus = EXIT_FAILURE;
377
334
goto fallback;
378
335
}
379
336
411
368
.doc = "Group ID the plugins will run as", .group = 3 },
412
369
{ .name = "debug", .key = 132,
413
370
.doc = "Debug mode", .group = 4 },
414
/*
415
* These reproduce what we would get without ARGP_NO_HELP
416
*/
417
{ .name = "help", .key = '?',
418
.doc = "Give this help list", .group = -1 },
419
{ .name = "usage", .key = -3,
420
.doc = "Give a short usage message", .group = -1 },
421
{ .name = "version", .key = 'V',
422
.doc = "Print program version", .group = -1 },
423
371
{ .name = NULL }
424
372
};
425
373
426
__attribute__((nonnull(3)))
427
error_t parse_opt(int key, char *arg, struct argp_state *state){
428
errno = 0;
429
switch(key){
430
char *tmp;
431
intmax_t tmp_id;
374
error_t parse_opt (int key, char *arg, __attribute__((unused))
375
struct argp_state *state) {
376
switch (key) {
432
377
case 'g': /* --global-options */
433
{
434
char *plugin_option;
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
437
break;
378
if (arg != NULL){
379
char *p;
380
while((p = strsep(&arg, ",")) != NULL){
381
if(p[0] == '\0'){
382
continue;
383
}
384
if(not add_argument(getplugin(NULL), p)){
385
perror("add_argument");
386
return ARGP_ERR_UNKNOWN;
438
387
}
439
388
}
440
389
}
441
390
break;
442
391
case 'G': /* --global-env */
443
add_environment(getplugin(NULL), arg, true);
392
if(arg == NULL){
393
break;
394
}
395
if(not add_environment(getplugin(NULL), arg, true)){
396
perror("add_environment");
397
}
444
398
break;
445
399
case 'o': /* --options-for */
446
{
447
char *option_list = strchr(arg, ':');
448
if(option_list == NULL){
449
argp_error(state, "No colon in \"%s\"", arg);
450
errno = EINVAL;
451
break;
452
}
453
*option_list = '\0';
454
option_list++;
455
if(arg[0] == '\0'){
456
argp_error(state, "Empty plugin name");
457
errno = EINVAL;
458
break;
459
}
460
char *option;
461
while((option = strsep(&option_list, ",")) != NULL){
462
if(not add_argument(getplugin(arg), option)){
463
break;
400
if (arg != NULL){
401
char *p_name = strsep(&arg, ":");
402
if(p_name[0] == '\0' or arg == NULL){
403
break;
404
}
405
char *opt = strsep(&arg, ":");
406
if(opt[0] == '\0' or opt == NULL){
407
break;
408
}
409
char *p;
410
while((p = strsep(&opt, ",")) != NULL){
411
if(p[0] == '\0'){
412
continue;
413
}
414
if(not add_argument(getplugin(p_name), p)){
415
perror("add_argument");
416
return ARGP_ERR_UNKNOWN;
464
417
}
465
418
}
466
419
}
467
420
break;
468
421
case 'E': /* --env-for */
422
if(arg == NULL){
423
break;
424
}
469
425
{
470
426
char *envdef = strchr(arg, ':');
471
427
if(envdef == NULL){
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
474
428
break;
475
429
}
476
430
*envdef = '\0';
477
envdef++;
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
482
433
}
483
add_environment(getplugin(arg), envdef, true);
484
434
}
485
435
break;
486
436
case 'd': /* --disable */
487
{
437
if (arg != NULL){
488
438
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = true;
439
if(p == NULL){
440
return ARGP_ERR_UNKNOWN;
491
441
}
442
p->disabled = true;
492
443
}
493
444
break;
494
445
case 'e': /* --enable */
495
{
446
if (arg != NULL){
496
447
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = false;
448
if(p == NULL){
449
return ARGP_ERR_UNKNOWN;
499
450
}
451
p->disabled = false;
500
452
}
501
453
break;
502
454
case 128: /* --plugin-dir */
503
455
free(plugindir);
504
456
plugindir = strdup(arg);
457
if(plugindir == NULL){
458
perror("strdup");
459
}
505
460
break;
506
461
case 129: /* --config-file */
507
462
/* This is already done by parse_opt_config_file() */
508
463
break;
509
464
case 130: /* --userid */
510
tmp_id = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmp_id != (uid_t)tmp_id){
513
argp_error(state, "Bad user ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)uid);
515
break;
516
}
517
uid = (uid_t)tmp_id;
465
uid = (uid_t)strtol(arg, NULL, 10);
518
466
break;
519
467
case 131: /* --groupid */
520
tmp_id = strtoimax(arg, &tmp, 10);
521
if(errno != 0 or tmp == arg or *tmp != '\0'
522
or tmp_id != (gid_t)tmp_id){
523
argp_error(state, "Bad group ID number: \"%s\", using %"
524
PRIdMAX, arg, (intmax_t)gid);
525
break;
526
}
527
gid = (gid_t)tmp_id;
468
gid = (gid_t)strtol(arg, NULL, 10);
528
469
break;
529
470
case 132: /* --debug */
530
471
debug = true;
531
472
break;
532
/*
533
* These reproduce what we would get without ARGP_NO_HELP
534
*/
535
case '?': /* --help */
536
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
537
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
538
case -3: /* --usage */
539
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
540
argp_state_help(state, state->out_stream,
541
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
542
case 'V': /* --version */
543
fprintf(state->out_stream, "%s\n", argp_program_version);
544
exit(EXIT_SUCCESS);
545
break;
546
/*
547
* When adding more options before this line, remember to also add a
548
* "case" to the "parse_opt_config_file" function below.
549
*/
550
473
case ARGP_KEY_ARG:
551
474
/* Cryptsetup always passes an argument, which is an empty
552
475
string if "none" was specified in /etc/crypttab. So if
553
476
argument was empty, we ignore it silently. */
554
if(arg[0] == '\0'){
555
break;
477
if(arg[0] != '\0'){
478
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
556
479
}
480
break;
481
case ARGP_KEY_END:
482
break;
557
483
default:
558
484
return ARGP_ERR_UNKNOWN;
559
485
}
560
return errno; /* Set to 0 at start */
486
return 0;
561
487
}
562
488
563
489
/* This option parser is the same as parse_opt() above, except it
564
490
ignores everything but the --config-file option. */
565
error_t parse_opt_config_file(int key, char *arg,
566
__attribute__((unused))
567
struct argp_state *state){
568
errno = 0;
569
switch(key){
491
error_t parse_opt_config_file (int key, char *arg,
492
__attribute__((unused))
493
struct argp_state *state) {
494
switch (key) {
570
495
case 'g': /* --global-options */
571
496
case 'G': /* --global-env */
572
497
case 'o': /* --options-for */
578
503
case 129: /* --config-file */
579
504
free(argfile);
580
505
argfile = strdup(arg);
581
break;
506
if(argfile == NULL){
507
perror("strdup");
508
}
509
break;
582
510
case 130: /* --userid */
583
511
case 131: /* --groupid */
584
512
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
588
513
case ARGP_KEY_ARG:
514
case ARGP_KEY_END:
589
515
break;
590
516
default:
591
517
return ARGP_ERR_UNKNOWN;
592
518
}
593
return errno;
519
return 0;
594
520
}
595
521
596
522
struct argp argp = { .options = options,
598
524
.args_doc = "",
599
525
.doc = "Mandos plugin runner -- Run plugins" };
600
526
601
/* Parse using parse_opt_config_file() in order to get the custom
527
/* Parse using the parse_opt_config_file in order to get the custom
602
528
config file location, if any. */
603
ret = argp_parse(&argp, argc, argv,
604
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
605
NULL, NULL);
606
switch(ret){
607
case 0:
608
break;
609
case ENOMEM:
610
default:
611
errno = ret;
612
error(0, errno, "argp_parse");
613
exitstatus = EX_OSERR;
614
goto fallback;
615
case EINVAL:
616
exitstatus = EX_USAGE;
529
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
530
if (ret == ARGP_ERR_UNKNOWN){
531
fprintf(stderr, "Unknown error while parsing arguments\n");
532
exitstatus = EXIT_FAILURE;
617
533
goto fallback;
618
534
}
619
535
621
537
argp.parser = parse_opt;
622
538
623
539
/* Open the configfile if available */
624
if(argfile == NULL){
540
if (argfile == NULL){
625
541
conffp = fopen(AFILE, "r");
626
542
} else {
627
543
conffp = fopen(argfile, "r");
628
}
544
}
629
545
if(conffp != NULL){
630
546
char *org_line = NULL;
631
547
char *p, *arg, *new_arg, *line;
632
548
size_t size = 0;
549
ssize_t sret;
633
550
const char whitespace_delims[] = " \r\t\f\v\n";
634
551
const char comment_delim[] = "#";
635
552
636
553
custom_argc = 1;
637
554
custom_argv = malloc(sizeof(char*) * 2);
638
555
if(custom_argv == NULL){
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
556
perror("malloc");
557
exitstatus = EXIT_FAILURE;
641
558
goto fallback;
642
559
}
643
560
custom_argv[0] = argv[0];
644
561
custom_argv[1] = NULL;
645
562
646
563
/* for each line in the config file, strip whitespace and ignore
647
564
commented text */
648
565
while(true){
650
567
if(sret == -1){
651
568
break;
652
569
}
653
570
654
571
line = org_line;
655
572
arg = strsep(&line, comment_delim);
656
573
while((p = strsep(&arg, whitespace_delims)) != NULL){
659
576
}
660
577
new_arg = strdup(p);
661
578
if(new_arg == NULL){
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
579
perror("strdup");
580
exitstatus = EXIT_FAILURE;
664
581
free(org_line);
665
582
goto fallback;
666
583
}
667
584
668
585
custom_argc += 1;
669
{
670
char **new_argv = realloc(custom_argv, sizeof(char *)
671
* ((unsigned int)
672
custom_argc + 1));
673
if(new_argv == NULL){
674
error(0, errno, "realloc");
675
exitstatus = EX_OSERR;
676
free(new_arg);
677
free(org_line);
678
goto fallback;
679
} else {
680
custom_argv = new_argv;
681
}
586
custom_argv = realloc(custom_argv, sizeof(char *)
587
* ((unsigned int) custom_argc + 1));
588
if(custom_argv == NULL){
589
perror("realloc");
590
exitstatus = EXIT_FAILURE;
591
free(org_line);
592
goto fallback;
682
593
}
683
594
custom_argv[custom_argc-1] = new_arg;
684
custom_argv[custom_argc] = NULL;
595
custom_argv[custom_argc] = NULL;
685
596
}
686
597
}
687
do {
688
ret = fclose(conffp);
689
} while(ret == EOF and errno == EINTR);
690
if(ret == EOF){
691
error(0, errno, "fclose");
692
exitstatus = EX_IOERR;
693
goto fallback;
694
}
695
598
free(org_line);
696
599
} else {
697
600
/* Check for harmful errors and go to fallback. Other errors might
698
601
not affect opening plugins */
699
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
603
perror("fopen");
604
exitstatus = EXIT_FAILURE;
702
605
goto fallback;
703
606
}
704
607
}
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
707
610
if(custom_argv != NULL){
708
ret = argp_parse(&argp, custom_argc, custom_argv,
709
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
710
NULL, NULL);
711
switch(ret){
712
case 0:
713
break;
714
case ENOMEM:
715
default:
716
errno = ret;
717
error(0, errno, "argp_parse");
718
exitstatus = EX_OSERR;
719
goto fallback;
720
case EINVAL:
721
exitstatus = EX_CONFIG;
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
612
0, NULL);
613
if (ret == ARGP_ERR_UNKNOWN){
614
fprintf(stderr, "Unknown error while parsing arguments\n");
615
exitstatus = EXIT_FAILURE;
722
616
goto fallback;
723
617
}
724
618
}
725
619
726
620
/* Parse actual command line arguments, to let them override the
727
621
config file */
728
ret = argp_parse(&argp, argc, argv,
729
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
730
NULL, NULL);
731
switch(ret){
732
case 0:
733
break;
734
case ENOMEM:
735
default:
736
errno = ret;
737
error(0, errno, "argp_parse");
738
exitstatus = EX_OSERR;
739
goto fallback;
740
case EINVAL:
741
exitstatus = EX_USAGE;
622
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
623
if (ret == ARGP_ERR_UNKNOWN){
624
fprintf(stderr, "Unknown error while parsing arguments\n");
625
exitstatus = EXIT_FAILURE;
742
626
goto fallback;
743
627
}
744
628
749
633
for(char **a = p->argv; *a != NULL; a++){
750
634
fprintf(stderr, "\tArg: %s\n", *a);
751
635
}
752
fprintf(stderr, "...and %d environment variables\n", p->envc);
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
753
637
for(char **a = p->environ; *a != NULL; a++){
754
638
fprintf(stderr, "\t%s\n", *a);
755
639
}
756
640
}
757
641
}
758
642
759
if(getuid() == 0){
760
/* Work around Debian bug #633582:
761
<http://bugs.debian.org/633582> */
762
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
763
if(plugindir_fd == -1){
764
error(0, errno, "open");
765
} else {
766
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
767
if(ret == -1){
768
error(0, errno, "fstat");
769
} else {
770
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
771
ret = fchown(plugindir_fd, uid, gid);
772
if(ret == -1){
773
error(0, errno, "fchown");
774
}
775
}
776
}
777
TEMP_FAILURE_RETRY(close(plugindir_fd));
778
}
779
}
780
781
/* Lower permissions */
782
ret = setgid(gid);
783
if(ret == -1){
784
error(0, errno, "setgid");
785
}
643
/* Strip permissions down to nobody */
786
644
ret = setuid(uid);
787
if(ret == -1){
788
error(0, errno, "setuid");
789
}
790
791
/* Open plugin directory with close_on_exec flag */
645
if (ret == -1){
646
perror("setuid");
647
}
648
setgid(gid);
649
if (ret == -1){
650
perror("setgid");
651
}
652
653
if (plugindir == NULL){
654
dir = opendir(PDIR);
655
} else {
656
dir = opendir(plugindir);
657
}
658
659
if(dir == NULL){
660
perror("Could not open plugin dir");
661
exitstatus = EXIT_FAILURE;
662
goto fallback;
663
}
664
665
/* Set the FD_CLOEXEC flag on the directory, if possible */
792
666
{
793
int dir_fd = -1;
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
} else {
803
dir_fd = open(plugindir, O_RDONLY |
804
#ifdef O_CLOEXEC
805
O_CLOEXEC
806
#else /* not O_CLOEXEC */
807
0
808
#endif /* not O_CLOEXEC */
809
);
810
}
811
if(dir_fd == -1){
812
error(0, errno, "Could not open plugin dir");
813
exitstatus = EX_UNAVAILABLE;
814
goto fallback;
815
}
816
817
#ifndef O_CLOEXEC
818
/* Set the FD_CLOEXEC flag on the directory */
819
ret = set_cloexec_flag(dir_fd);
820
if(ret < 0){
821
error(0, errno, "set_cloexec_flag");
822
TEMP_FAILURE_RETRY(close(dir_fd));
823
exitstatus = EX_OSERR;
824
goto fallback;
825
}
826
#endif /* O_CLOEXEC */
827
828
dir = fdopendir(dir_fd);
829
if(dir == NULL){
830
error(0, errno, "Could not open plugin dir");
831
TEMP_FAILURE_RETRY(close(dir_fd));
832
exitstatus = EX_OSERR;
833
goto fallback;
667
int dir_fd = dirfd(dir);
668
if(dir_fd >= 0){
669
ret = set_cloexec_flag(dir_fd);
670
if(ret < 0){
671
perror("set_cloexec_flag");
672
exitstatus = EXIT_FAILURE;
673
goto fallback;
674
}
834
675
}
835
676
}
836
677
838
679
839
680
/* Read and execute any executable in the plugin directory*/
840
681
while(true){
841
do {
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
682
dirst = readdir(dir);
844
683
845
684
/* All directory entries have been processed */
846
685
if(dirst == NULL){
847
if(errno == EBADF){
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
686
if (errno == EBADF){
687
perror("readdir");
688
exitstatus = EXIT_FAILURE;
850
689
goto fallback;
851
690
}
852
691
break;
858
697
{
859
698
bool bad_name = false;
860
699
861
const char * const bad_prefixes[] = { ".", "#", NULL };
700
const char const *bad_prefixes[] = { ".", "#", NULL };
862
701
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
702
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
864
703
".dpkg-old",
865
704
".dpkg-bak",
866
705
".dpkg-divert", NULL };
867
#ifdef __GNUC__
868
#pragma GCC diagnostic push
869
#pragma GCC diagnostic ignored "-Wcast-qual"
870
#endif
871
for(const char **pre = (const char **)bad_prefixes;
872
*pre != NULL; pre++){
873
#ifdef __GNUC__
874
#pragma GCC diagnostic pop
875
#endif
706
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
876
707
size_t pre_len = strlen(*pre);
877
708
if((d_name_len >= pre_len)
878
709
and strncmp((dirst->d_name), *pre, pre_len) == 0){
887
718
if(bad_name){
888
719
continue;
889
720
}
890
#ifdef __GNUC__
891
#pragma GCC diagnostic push
892
#pragma GCC diagnostic ignored "-Wcast-qual"
893
#endif
894
for(const char **suf = (const char **)bad_suffixes;
895
*suf != NULL; suf++){
896
#ifdef __GNUC__
897
#pragma GCC diagnostic pop
898
#endif
721
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
899
722
size_t suf_len = strlen(*suf);
900
723
if((d_name_len >= suf_len)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
724
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
902
725
== 0)){
903
726
if(debug){
904
727
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
913
736
continue;
914
737
}
915
738
}
916
739
917
740
char *filename;
918
741
if(plugindir == NULL){
919
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
920
dirst->d_name));
742
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
921
743
} else {
922
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
923
plugindir,
924
dirst->d_name));
744
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
925
745
}
926
746
if(ret < 0){
927
error(0, errno, "asprintf");
747
perror("asprintf");
928
748
continue;
929
749
}
930
750
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
932
if(ret == -1){
933
error(0, errno, "stat");
751
ret = stat(filename, &st);
752
if (ret == -1){
753
perror("stat");
934
754
free(filename);
935
755
continue;
936
756
}
937
757
938
758
/* Ignore non-executable files */
939
if(not S_ISREG(st.st_mode)
940
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
759
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
941
760
if(debug){
942
761
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
943
762
" with bad type or mode\n", filename);
948
767
949
768
plugin *p = getplugin(dirst->d_name);
950
769
if(p == NULL){
951
error(0, errno, "getplugin");
770
perror("getplugin");
952
771
free(filename);
953
772
continue;
954
773
}
966
785
if(g != NULL){
967
786
for(char **a = g->argv + 1; *a != NULL; a++){
968
787
if(not add_argument(p, *a)){
969
error(0, errno, "add_argument");
788
perror("add_argument");
970
789
}
971
790
}
972
791
/* Add global environment variables */
973
792
for(char **e = g->environ; *e != NULL; e++){
974
793
if(not add_environment(p, *e, false)){
975
error(0, errno, "add_environment");
794
perror("add_environment");
976
795
}
977
796
}
978
797
}
983
802
if(p->environ[0] != NULL){
984
803
for(char **e = environ; *e != NULL; e++){
985
804
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
805
perror("add_environment");
987
806
}
988
807
}
989
808
}
990
809
991
810
int pipefd[2];
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
if(ret == -1){
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
811
ret = pipe(pipefd);
812
if (ret == -1){
813
perror("pipe");
814
exitstatus = EXIT_FAILURE;
996
815
goto fallback;
997
816
}
998
817
/* Ask OS to automatic close the pipe on exec */
999
818
ret = set_cloexec_flag(pipefd[0]);
1000
819
if(ret < 0){
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
820
perror("set_cloexec_flag");
821
exitstatus = EXIT_FAILURE;
1003
822
goto fallback;
1004
823
}
1005
824
ret = set_cloexec_flag(pipefd[1]);
1006
825
if(ret < 0){
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
826
perror("set_cloexec_flag");
827
exitstatus = EXIT_FAILURE;
1009
828
goto fallback;
1010
829
}
1011
830
/* Block SIGCHLD until process is safely in process list */
1012
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1013
&sigchld_action.sa_mask,
1014
NULL));
831
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1015
832
if(ret < 0){
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
833
perror("sigprocmask");
834
exitstatus = EXIT_FAILURE;
1018
835
goto fallback;
1019
836
}
1020
837
/* Starting a new process to be watched */
1021
pid_t pid;
1022
do {
1023
pid = fork();
1024
} while(pid == -1 and errno == EINTR);
838
pid_t pid = fork();
1025
839
if(pid == -1){
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
840
perror("fork");
841
exitstatus = EXIT_FAILURE;
1028
842
goto fallback;
1029
843
}
1030
844
if(pid == 0){
1031
845
/* this is the child process */
1032
846
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1033
847
if(ret < 0){
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
848
perror("sigaction");
849
_exit(EXIT_FAILURE);
1036
850
}
1037
851
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1038
852
if(ret < 0){
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
853
perror("sigprocmask");
854
_exit(EXIT_FAILURE);
1041
855
}
1042
856
1043
857
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1044
858
if(ret == -1){
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
859
perror("dup2");
860
_exit(EXIT_FAILURE);
1047
861
}
1048
862
1049
863
if(dirfd(dir) < 0){
1053
867
}
1054
868
if(p->environ[0] == NULL){
1055
869
if(execv(filename, p->argv) < 0){
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
870
perror("execv");
871
_exit(EXIT_FAILURE);
1058
872
}
1059
873
} else {
1060
874
if(execve(filename, p->argv, p->environ) < 0){
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
875
perror("execve");
876
_exit(EXIT_FAILURE);
1063
877
}
1064
878
}
1065
879
/* no return */
1066
880
}
1067
881
/* Parent process */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1069
pipe */
882
close(pipefd[1]); /* Close unused write end of pipe */
1070
883
free(filename);
1071
884
plugin *new_plugin = getplugin(dirst->d_name);
1072
if(new_plugin == NULL){
1073
error(0, errno, "getplugin");
1074
ret = (int)(TEMP_FAILURE_RETRY
1075
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1076
NULL)));
885
if (new_plugin == NULL){
886
perror("getplugin");
887
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1077
888
if(ret < 0){
1078
error(0, errno, "sigprocmask");
889
perror("sigprocmask");
1079
890
}
1080
exitstatus = EX_OSERR;
891
exitstatus = EXIT_FAILURE;
1081
892
goto fallback;
1082
893
}
1083
894
1086
897
1087
898
/* Unblock SIGCHLD so signal handler can be run if this process
1088
899
has already completed */
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
1091
NULL));
900
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1092
901
if(ret < 0){
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
902
perror("sigprocmask");
903
exitstatus = EXIT_FAILURE;
1095
904
goto fallback;
1096
905
}
1097
906
1098
#if defined (__GNUC__) and defined (__GLIBC__)
1099
#if not __GLIBC_PREREQ(2, 16)
1100
#pragma GCC diagnostic push
1101
#pragma GCC diagnostic ignored "-Wsign-conversion"
1102
#endif
1103
#endif
1104
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion in GNU libc
1106
before 2.16 */
1107
#if defined (__GNUC__) and defined (__GLIBC__)
1108
#if not __GLIBC_PREREQ(2, 16)
1109
#pragma GCC diagnostic pop
1110
#endif
1111
#endif
907
FD_SET(new_plugin->fd, &rfds_all);
1112
908
1113
if(maxfd < new_plugin->fd){
909
if (maxfd < new_plugin->fd){
1114
910
maxfd = new_plugin->fd;
1115
911
}
1116
912
}
1117
913
1118
TEMP_FAILURE_RETRY(closedir(dir));
914
closedir(dir);
1119
915
dir = NULL;
1120
free_plugin(getplugin(NULL));
1121
916
1122
917
for(plugin *p = plugin_list; p != NULL; p = p->next){
1123
918
if(p->pid != 0){
1134
929
while(plugin_list){
1135
930
fd_set rfds = rfds_all;
1136
931
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
932
if (select_ret == -1){
933
perror("select");
934
exitstatus = EXIT_FAILURE;
1140
935
goto fallback;
1141
936
}
1142
937
/* OK, now either a process completed, or something can be read
1143
938
from one of them */
1144
939
for(plugin *proc = plugin_list; proc != NULL;){
1145
940
/* Is this process completely done? */
1146
if(proc->completed and proc->eof){
941
if(proc->eof and proc->completed){
1147
942
/* Only accept the plugin output if it exited cleanly */
1148
943
if(not WIFEXITED(proc->status)
1149
944
or WEXITSTATUS(proc->status) != 0){
1150
945
/* Bad exit by plugin */
1151
946
1152
947
if(debug){
1153
948
if(WIFEXITED(proc->status)){
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
949
fprintf(stderr, "Plugin %u exited with status %d\n",
950
(unsigned int) (proc->pid),
1157
951
WEXITSTATUS(proc->status));
1158
} else if(WIFSIGNALED(proc->status)){
1159
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1160
" signal %d: %s\n", proc->name,
1161
(intmax_t) (proc->pid),
1162
WTERMSIG(proc->status),
1163
strsignal(WTERMSIG(proc->status)));
952
} else if(WIFSIGNALED(proc->status)) {
953
fprintf(stderr, "Plugin %u killed by signal %d\n",
954
(unsigned int) (proc->pid),
955
WTERMSIG(proc->status));
1164
956
} else if(WCOREDUMP(proc->status)){
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
957
fprintf(stderr, "Plugin %d dumped core\n",
958
(unsigned int) (proc->pid));
1167
959
}
1168
960
}
1169
961
1170
962
/* Remove the plugin */
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic push
1174
#pragma GCC diagnostic ignored "-Wsign-conversion"
1175
#endif
1176
#endif
1177
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1178
-Wconversion in GNU libc
1179
before 2.16 */
1180
#if defined (__GNUC__) and defined (__GLIBC__)
1181
#if not __GLIBC_PREREQ(2, 16)
1182
#pragma GCC diagnostic pop
1183
#endif
1184
#endif
1185
963
FD_CLR(proc->fd, &rfds_all);
964
1186
965
/* Block signal while modifying process_list */
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1188
(SIG_BLOCK,
1189
&sigchld_action.sa_mask,
1190
NULL));
966
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1191
967
if(ret < 0){
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
968
perror("sigprocmask");
969
exitstatus = EXIT_FAILURE;
1194
970
goto fallback;
1195
971
}
1196
972
1199
975
proc = next_plugin;
1200
976
1201
977
/* We are done modifying process list, so unblock signal */
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
978
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
979
NULL);
1205
980
if(ret < 0){
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
981
perror("sigprocmask");
982
exitstatus = EXIT_FAILURE;
1208
983
goto fallback;
1209
984
}
1210
985
1220
995
bool bret = print_out_password(proc->buffer,
1221
996
proc->buffer_length);
1222
997
if(not bret){
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
998
perror("print_out_password");
999
exitstatus = EXIT_FAILURE;
1225
1000
}
1226
1001
goto fallback;
1227
1002
}
1228
1003
1229
1004
/* This process has not completed. Does it have any output? */
1230
#if defined (__GNUC__) and defined (__GLIBC__)
1231
#if not __GLIBC_PREREQ(2, 16)
1232
#pragma GCC diagnostic push
1233
#pragma GCC diagnostic ignored "-Wsign-conversion"
1234
#endif
1235
#endif
1236
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1237
warning from
1238
-Wconversion
1239
in GNU libc
1240
before
1241
2.16 */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic pop
1245
#endif
1246
#endif
1005
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1247
1006
/* This process had nothing to say at this time */
1248
1007
proc = proc->next;
1249
1008
continue;
1250
1009
}
1251
1010
/* Before reading, make the process' data buffer large enough */
1252
1011
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1253
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1254
+ (size_t) BUFFER_SIZE);
1255
if(new_buffer == NULL){
1256
error(0, errno, "malloc");
1257
exitstatus = EX_OSERR;
1012
proc->buffer = realloc(proc->buffer, proc->buffer_size
1013
+ (size_t) BUFFER_SIZE);
1014
if (proc->buffer == NULL){
1015
perror("malloc");
1016
exitstatus = EXIT_FAILURE;
1258
1017
goto fallback;
1259
1018
}
1260
proc->buffer = new_buffer;
1261
1019
proc->buffer_size += BUFFER_SIZE;
1262
1020
}
1263
1021
/* Read from the process */
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1265
proc->buffer
1266
+ proc->buffer_length,
1267
BUFFER_SIZE));
1268
if(sret < 0){
1022
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1023
BUFFER_SIZE);
1024
if(ret < 0){
1269
1025
/* Read error from this process; ignore the error */
1270
1026
proc = proc->next;
1271
1027
continue;
1272
1028
}
1273
if(sret == 0){
1029
if(ret == 0){
1274
1030
/* got EOF */
1275
1031
proc->eof = true;
1276
1032
} else {
1277
proc->buffer_length += (size_t) sret;
1033
proc->buffer_length += (size_t) ret;
1278
1034
}
1279
1035
}
1280
1036
}
1281
1282
1037
1038
1283
1039
fallback:
1284
1040
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
1041
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1287
1042
/* Fallback if all plugins failed, none are found or an error
1288
1043
occured */
1289
1044
bool bret;
1297
1052
}
1298
1053
bret = print_out_password(passwordbuffer, len);
1299
1054
if(not bret){
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
1055
perror("print_out_password");
1056
exitstatus = EXIT_FAILURE;
1302
1057
}
1303
1058
}
1304
1059
1305
1060
/* Restore old signal handler */
1306
1061
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1307
1062
if(ret == -1){
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
1063
perror("sigaction");
1064
exitstatus = EXIT_FAILURE;
1310
1065
}
1311
1066
1312
1067
if(custom_argv != NULL){
1327
1082
ret = kill(p->pid, SIGTERM);
1328
1083
if(ret == -1 and errno != ESRCH){
1329
1084
/* Set-uid proccesses might not get closed */
1330
error(0, errno, "kill");
1085
perror("kill");
1331
1086
}
1332
1087
}
1333
1088
}
1334
1089
1335
1090
/* Wait for any remaining child processes to terminate */
1336
do {
1091
do{
1337
1092
ret = wait(NULL);
1338
1093
} while(ret >= 0);
1339
1094
if(errno != ECHILD){
1340
error(0, errno, "wait");
1095
perror("wait");
1341
1096
}
1342
1097
1343
1098
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0