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- Committer: Teddy Hogeborn
- Date: 2008-09-21 12:04:02 UTC
- Revision ID: teddy@fukt.bsnet.se-20080921120402-mgd2jl8xo634jw18
* Makefile: Put the init script before avahi-daemon.
* debian/mandos.prerm: Bug fix: stop mandos, not ssh.
* debian/rules (install-indep): Put the init script before
avahi-daemon.
* init.d/mandos: Require "avahi-daemon".
* debian/mandos.prerm: Bug fix: stop mandos, not ssh.
* debian/rules (install-indep): Put the init script before
avahi-daemon.
* init.d/mandos: Require "avahi-daemon".
- files added:
- debian/mandos-client.config
- 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 © 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>";
83
74
84
75
typedef struct plugin{
85
76
char *name; /* can be NULL or any plugin name */
88
79
char **environ;
89
80
int envc;
90
81
bool disabled;
91
82
92
83
/* Variables used for running processes*/
93
84
pid_t pid;
94
85
int fd;
96
87
size_t buffer_size;
97
88
size_t buffer_length;
98
89
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
90
volatile bool completed;
91
volatile int status;
101
92
struct plugin *next;
102
93
} plugin;
103
94
105
96
106
97
/* Gets an existing plugin based on name,
107
98
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
99
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
111
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
if((p->name == name)
113
or (p->name and name and (strcmp(p->name, name) == 0))){
100
/* Check for exiting plugin with that name */
101
for (plugin *p = plugin_list; p != NULL; p = p->next){
102
if ((p->name == name)
103
or (p->name and name and (strcmp(p->name, name) == 0))){
114
104
return p;
115
105
}
116
106
}
117
107
/* 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);
122
if(new_plugin == NULL){
108
plugin *new_plugin = malloc(sizeof(plugin));
109
if (new_plugin == NULL){
123
110
return NULL;
124
111
}
125
112
char *copy_name = NULL;
126
113
if(name != NULL){
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
114
copy_name = strdup(name);
130
115
if(copy_name == NULL){
131
int e = errno;
132
free(new_plugin);
133
errno = e;
134
116
return NULL;
135
117
}
136
118
}
137
119
138
*new_plugin = (plugin){ .name = copy_name,
139
.argc = 1,
140
.disabled = false,
141
.next = plugin_list };
120
*new_plugin = (plugin) { .name = copy_name,
121
.argc = 1,
122
.disabled = false,
123
.next = plugin_list };
142
124
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
146
if(new_plugin->argv == NULL){
147
int e = errno;
125
new_plugin->argv = malloc(sizeof(char *) * 2);
126
if (new_plugin->argv == NULL){
148
127
free(copy_name);
149
128
free(new_plugin);
150
errno = e;
151
129
return NULL;
152
130
}
153
131
new_plugin->argv[0] = copy_name;
154
132
new_plugin->argv[1] = NULL;
155
133
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
134
new_plugin->environ = malloc(sizeof(char *));
159
135
if(new_plugin->environ == NULL){
160
int e = errno;
161
136
free(copy_name);
162
137
free(new_plugin->argv);
163
138
free(new_plugin);
164
errno = e;
165
139
return NULL;
166
140
}
167
141
new_plugin->environ[0] = NULL;
172
146
}
173
147
174
148
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
149
static bool add_to_char_array(const char *new, char ***array,
177
150
int *len){
178
151
/* 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);
152
*array = realloc(*array, sizeof(char *)
153
* (size_t) ((*len) + 2));
184
154
/* Malloc check */
185
if(new_array == NULL){
155
if(*array == NULL){
186
156
return false;
187
157
}
188
*array = new_array;
189
158
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
159
char *copy = strdup(new);
194
160
if(copy == NULL){
195
161
return false;
196
162
}
203
169
}
204
170
205
171
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
172
static bool add_argument(plugin *p, const char *arg){
208
173
if(p == NULL){
209
174
return false;
212
177
}
213
178
214
179
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
180
static bool add_environment(plugin *p, const char *def, bool replace){
217
181
if(p == NULL){
218
182
return false;
220
184
/* namelen = length of name of environment variable */
221
185
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
186
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
187
for(char **e = p->environ; *e != NULL; e++){
188
if(strncmp(*e, def, namelen + 1) == 0){
225
189
/* It already exists */
226
190
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){
191
char *new = realloc(*e, strlen(def) + 1);
192
if(new == NULL){
232
193
return false;
233
194
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
195
*e = new;
196
strcpy(*e, def);
236
197
}
237
198
return true;
238
199
}
243
204
/*
244
205
* Based on the example in the GNU LibC manual chapter 13.13 "File
245
206
* Descriptor Flags".
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
207
* *Note File Descriptor Flags:(libc)Descriptor Flags.
247
208
*/
248
__attribute__((warn_unused_result))
249
209
static int set_cloexec_flag(int fd){
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
210
int ret = fcntl(fd, F_GETFD, 0);
251
211
/* If reading the flags failed, return error indication now. */
252
212
if(ret < 0){
253
213
return ret;
254
214
}
255
215
/* Store modified flag word in the descriptor. */
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
257
ret | FD_CLOEXEC));
216
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
217
}
259
218
260
219
261
220
/* Mark processes as completed when they exit, and save their exit
262
221
status. */
263
222
static void handle_sigchld(__attribute__((unused)) int sig){
264
int old_errno = errno;
265
223
while(true){
266
224
plugin *proc = plugin_list;
267
225
int status;
271
229
break;
272
230
}
273
231
if(pid == -1){
274
if(errno == ECHILD){
275
/* No child processes */
276
break;
232
if (errno != ECHILD){
233
perror("waitpid");
277
234
}
278
error(0, errno, "waitpid");
235
/* No child processes */
236
break;
279
237
}
280
238
281
239
/* A child exited, find it in process_list */
287
245
continue;
288
246
}
289
247
proc->status = status;
290
proc->completed = 1;
248
proc->completed = true;
291
249
}
292
errno = old_errno;
293
250
}
294
251
295
252
/* Prints out a password to stdout */
296
__attribute__((nonnull, warn_unused_result))
297
253
static bool print_out_password(const char *buffer, size_t length){
298
254
ssize_t ret;
299
255
for(size_t written = 0; written < length; written += (size_t)ret){
307
263
}
308
264
309
265
/* Removes and free a plugin from the plugin list */
310
__attribute__((nonnull))
311
266
static void free_plugin(plugin *plugin_node){
312
267
313
268
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
319
274
}
320
275
free(plugin_node->environ);
321
276
free(plugin_node->buffer);
322
277
323
278
/* Removes the plugin from the singly-linked list */
324
279
if(plugin_node == plugin_list){
325
280
/* First one - simple */
353
308
struct stat st;
354
309
fd_set rfds_all;
355
310
int ret, maxfd = 0;
356
ssize_t sret;
357
311
uid_t uid = 65534;
358
312
gid_t gid = 65534;
359
313
bool debug = false;
368
322
sigemptyset(&sigchld_action.sa_mask);
369
323
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
370
324
if(ret == -1){
371
error(0, errno, "sigaddset");
372
exitstatus = EX_OSERR;
325
perror("sigaddset");
326
exitstatus = EXIT_FAILURE;
373
327
goto fallback;
374
328
}
375
329
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
376
330
if(ret == -1){
377
error(0, errno, "sigaction");
378
exitstatus = EX_OSERR;
331
perror("sigaction");
332
exitstatus = EXIT_FAILURE;
379
333
goto fallback;
380
334
}
381
335
413
367
.doc = "Group ID the plugins will run as", .group = 3 },
414
368
{ .name = "debug", .key = 132,
415
369
.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
370
{ .name = NULL }
426
371
};
427
372
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;
373
error_t parse_opt (int key, char *arg, __attribute__((unused))
374
struct argp_state *state) {
375
switch (key) {
434
376
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;
377
if (arg != NULL){
378
char *p;
379
while((p = strsep(&arg, ",")) != NULL){
380
if(p[0] == '\0'){
381
continue;
382
}
383
if(not add_argument(getplugin(NULL), p)){
384
perror("add_argument");
385
return ARGP_ERR_UNKNOWN;
440
386
}
441
387
}
442
errno = 0;
443
388
}
444
389
break;
445
390
case 'G': /* --global-env */
446
if(add_environment(getplugin(NULL), arg, true)){
447
errno = 0;
391
if(arg == NULL){
392
break;
393
}
394
if(not add_environment(getplugin(NULL), arg, true)){
395
perror("add_environment");
448
396
}
449
397
break;
450
398
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;
399
if (arg != NULL){
400
char *p_name = strsep(&arg, ":");
401
if(p_name[0] == '\0' or arg == NULL){
402
break;
403
}
404
char *opt = strsep(&arg, ":");
405
if(opt[0] == '\0' or opt == NULL){
406
break;
407
}
408
char *p;
409
while((p = strsep(&opt, ",")) != NULL){
410
if(p[0] == '\0'){
411
continue;
412
}
413
if(not add_argument(getplugin(p_name), p)){
414
perror("add_argument");
415
return ARGP_ERR_UNKNOWN;
416
}
417
}
472
418
}
473
419
break;
474
420
case 'E': /* --env-for */
421
if(arg == NULL){
422
break;
423
}
475
424
{
476
425
char *envdef = strchr(arg, ':');
477
426
if(envdef == NULL){
478
argp_error(state, "No colon in \"%s\"", arg);
479
errno = EINVAL;
480
427
break;
481
428
}
482
429
*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;
430
if(not add_environment(getplugin(arg), envdef+1, true)){
431
perror("add_environment");
491
432
}
492
433
}
493
434
break;
494
435
case 'd': /* --disable */
495
{
436
if (arg != NULL){
496
437
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = true;
499
errno = 0;
438
if(p == NULL){
439
return ARGP_ERR_UNKNOWN;
500
440
}
441
p->disabled = true;
501
442
}
502
443
break;
503
444
case 'e': /* --enable */
504
{
445
if (arg != NULL){
505
446
plugin *p = getplugin(arg);
506
if(p != NULL){
507
p->disabled = false;
508
errno = 0;
447
if(p == NULL){
448
return ARGP_ERR_UNKNOWN;
509
449
}
450
p->disabled = false;
510
451
}
511
452
break;
512
453
case 128: /* --plugin-dir */
513
454
free(plugindir);
514
455
plugindir = strdup(arg);
515
if(plugindir != NULL){
516
errno = 0;
517
}
456
if(plugindir == NULL){
457
perror("strdup");
458
}
518
459
break;
519
460
case 129: /* --config-file */
520
461
/* This is already done by parse_opt_config_file() */
521
462
break;
522
463
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;
529
}
530
uid = (uid_t)tmp_id;
531
errno = 0;
464
uid = (uid_t)strtol(arg, NULL, 10);
532
465
break;
533
466
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;
540
}
541
gid = (gid_t)tmp_id;
542
errno = 0;
467
gid = (gid_t)strtol(arg, NULL, 10);
543
468
break;
544
469
case 132: /* --debug */
545
470
debug = true;
546
471
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
/*
562
* When adding more options before this line, remember to also add a
563
* "case" to the "parse_opt_config_file" function below.
564
*/
565
472
case ARGP_KEY_ARG:
566
473
/* Cryptsetup always passes an argument, which is an empty
567
474
string if "none" was specified in /etc/crypttab. So if
568
475
argument was empty, we ignore it silently. */
569
if(arg[0] == '\0'){
570
break;
476
if(arg[0] != '\0'){
477
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
571
478
}
479
break;
480
case ARGP_KEY_END:
481
break;
572
482
default:
573
483
return ARGP_ERR_UNKNOWN;
574
484
}
575
return errno; /* Set to 0 at start */
485
return 0;
576
486
}
577
487
578
488
/* This option parser is the same as parse_opt() above, except it
579
489
ignores everything but the --config-file option. */
580
error_t parse_opt_config_file(int key, char *arg,
581
__attribute__((unused))
582
struct argp_state *state){
583
errno = 0;
584
switch(key){
490
error_t parse_opt_config_file (int key, char *arg,
491
__attribute__((unused))
492
struct argp_state *state) {
493
switch (key) {
585
494
case 'g': /* --global-options */
586
495
case 'G': /* --global-env */
587
496
case 'o': /* --options-for */
593
502
case 129: /* --config-file */
594
503
free(argfile);
595
504
argfile = strdup(arg);
596
if(argfile != NULL){
597
errno = 0;
505
if(argfile == NULL){
506
perror("strdup");
598
507
}
599
break;
508
break;
600
509
case 130: /* --userid */
601
510
case 131: /* --groupid */
602
511
case 132: /* --debug */
603
case '?': /* --help */
604
case -3: /* --usage */
605
case 'V': /* --version */
606
512
case ARGP_KEY_ARG:
513
case ARGP_KEY_END:
607
514
break;
608
515
default:
609
516
return ARGP_ERR_UNKNOWN;
610
517
}
611
return errno;
518
return 0;
612
519
}
613
520
614
521
struct argp argp = { .options = options,
616
523
.args_doc = "",
617
524
.doc = "Mandos plugin runner -- Run plugins" };
618
525
619
/* Parse using parse_opt_config_file() in order to get the custom
526
/* Parse using the parse_opt_config_file in order to get the custom
620
527
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;
528
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
529
if (ret == ARGP_ERR_UNKNOWN){
530
fprintf(stderr, "Unknown error while parsing arguments\n");
531
exitstatus = EXIT_FAILURE;
635
532
goto fallback;
636
533
}
637
534
639
536
argp.parser = parse_opt;
640
537
641
538
/* Open the configfile if available */
642
if(argfile == NULL){
539
if (argfile == NULL){
643
540
conffp = fopen(AFILE, "r");
644
541
} else {
645
542
conffp = fopen(argfile, "r");
646
}
543
}
647
544
if(conffp != NULL){
648
545
char *org_line = NULL;
649
546
char *p, *arg, *new_arg, *line;
650
547
size_t size = 0;
548
ssize_t sret;
651
549
const char whitespace_delims[] = " \r\t\f\v\n";
652
550
const char comment_delim[] = "#";
653
551
654
552
custom_argc = 1;
655
553
custom_argv = malloc(sizeof(char*) * 2);
656
554
if(custom_argv == NULL){
657
error(0, errno, "malloc");
658
exitstatus = EX_OSERR;
555
perror("malloc");
556
exitstatus = EXIT_FAILURE;
659
557
goto fallback;
660
558
}
661
559
custom_argv[0] = argv[0];
662
560
custom_argv[1] = NULL;
663
561
664
562
/* for each line in the config file, strip whitespace and ignore
665
563
commented text */
666
564
while(true){
668
566
if(sret == -1){
669
567
break;
670
568
}
671
569
672
570
line = org_line;
673
571
arg = strsep(&line, comment_delim);
674
572
while((p = strsep(&arg, whitespace_delims)) != NULL){
677
575
}
678
576
new_arg = strdup(p);
679
577
if(new_arg == NULL){
680
error(0, errno, "strdup");
681
exitstatus = EX_OSERR;
578
perror("strdup");
579
exitstatus = EXIT_FAILURE;
682
580
free(org_line);
683
581
goto fallback;
684
582
}
685
583
686
584
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
}
585
custom_argv = realloc(custom_argv, sizeof(char *)
586
* ((unsigned int) custom_argc + 1));
587
if(custom_argv == NULL){
588
perror("realloc");
589
exitstatus = EXIT_FAILURE;
590
free(org_line);
591
goto fallback;
700
592
}
701
593
custom_argv[custom_argc-1] = new_arg;
702
custom_argv[custom_argc] = NULL;
594
custom_argv[custom_argc] = NULL;
703
595
}
704
596
}
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
597
free(org_line);
714
598
} else {
715
599
/* Check for harmful errors and go to fallback. Other errors might
716
600
not affect opening plugins */
717
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
601
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
602
perror("fopen");
603
exitstatus = EXIT_FAILURE;
720
604
goto fallback;
721
605
}
722
606
}
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
607
/* If there was any arguments from configuration file,
608
pass them to parser as command arguments */
725
609
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;
610
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
611
0, NULL);
612
if (ret == ARGP_ERR_UNKNOWN){
613
fprintf(stderr, "Unknown error while parsing arguments\n");
614
exitstatus = EXIT_FAILURE;
740
615
goto fallback;
741
616
}
742
617
}
743
618
744
619
/* Parse actual command line arguments, to let them override the
745
620
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;
621
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
622
if (ret == ARGP_ERR_UNKNOWN){
623
fprintf(stderr, "Unknown error while parsing arguments\n");
624
exitstatus = EXIT_FAILURE;
760
625
goto fallback;
761
626
}
762
627
767
632
for(char **a = p->argv; *a != NULL; a++){
768
633
fprintf(stderr, "\tArg: %s\n", *a);
769
634
}
770
fprintf(stderr, "...and %d environment variables\n", p->envc);
635
fprintf(stderr, "...and %u environment variables\n", p->envc);
771
636
for(char **a = p->environ; *a != NULL; a++){
772
637
fprintf(stderr, "\t%s\n", *a);
773
638
}
774
639
}
775
640
}
776
641
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
}
642
/* Strip permissions down to nobody */
804
643
ret = setuid(uid);
805
if(ret == -1){
806
error(0, errno, "setuid");
807
}
808
809
/* Open plugin directory with close_on_exec flag */
644
if (ret == -1){
645
perror("setuid");
646
}
647
setgid(gid);
648
if (ret == -1){
649
perror("setgid");
650
}
651
652
if (plugindir == NULL){
653
dir = opendir(PDIR);
654
} else {
655
dir = opendir(plugindir);
656
}
657
658
if(dir == NULL){
659
perror("Could not open plugin dir");
660
exitstatus = EXIT_FAILURE;
661
goto fallback;
662
}
663
664
/* Set the FD_CLOEXEC flag on the directory, if possible */
810
665
{
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;
666
int dir_fd = dirfd(dir);
667
if(dir_fd >= 0){
668
ret = set_cloexec_flag(dir_fd);
669
if(ret < 0){
670
perror("set_cloexec_flag");
671
exitstatus = EXIT_FAILURE;
672
goto fallback;
673
}
852
674
}
853
675
}
854
676
856
678
857
679
/* Read and execute any executable in the plugin directory*/
858
680
while(true){
859
do {
860
dirst = readdir(dir);
861
} while(dirst == NULL and errno == EINTR);
681
dirst = readdir(dir);
862
682
863
683
/* All directory entries have been processed */
864
684
if(dirst == NULL){
865
if(errno == EBADF){
866
error(0, errno, "readdir");
867
exitstatus = EX_IOERR;
685
if (errno == EBADF){
686
perror("readdir");
687
exitstatus = EXIT_FAILURE;
868
688
goto fallback;
869
689
}
870
690
break;
876
696
{
877
697
bool bad_name = false;
878
698
879
const char * const bad_prefixes[] = { ".", "#", NULL };
699
const char const *bad_prefixes[] = { ".", "#", NULL };
880
700
881
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
701
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
882
702
".dpkg-old",
883
".dpkg-bak",
884
703
".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
704
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
894
705
size_t pre_len = strlen(*pre);
895
706
if((d_name_len >= pre_len)
896
707
and strncmp((dirst->d_name), *pre, pre_len) == 0){
905
716
if(bad_name){
906
717
continue;
907
718
}
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
719
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
917
720
size_t suf_len = strlen(*suf);
918
721
if((d_name_len >= suf_len)
919
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
722
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
920
723
== 0)){
921
724
if(debug){
922
725
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
931
734
continue;
932
735
}
933
736
}
934
737
935
738
char *filename;
936
739
if(plugindir == NULL){
937
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
938
dirst->d_name));
740
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
939
741
} else {
940
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
941
plugindir,
942
dirst->d_name));
742
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
943
743
}
944
744
if(ret < 0){
945
error(0, errno, "asprintf");
745
perror("asprintf");
946
746
continue;
947
747
}
948
748
949
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
950
if(ret == -1){
951
error(0, errno, "stat");
749
ret = stat(filename, &st);
750
if (ret == -1){
751
perror("stat");
952
752
free(filename);
953
753
continue;
954
754
}
955
755
956
756
/* Ignore non-executable files */
957
if(not S_ISREG(st.st_mode)
958
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
757
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
959
758
if(debug){
960
759
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
961
760
" with bad type or mode\n", filename);
966
765
967
766
plugin *p = getplugin(dirst->d_name);
968
767
if(p == NULL){
969
error(0, errno, "getplugin");
768
perror("getplugin");
970
769
free(filename);
971
770
continue;
972
771
}
984
783
if(g != NULL){
985
784
for(char **a = g->argv + 1; *a != NULL; a++){
986
785
if(not add_argument(p, *a)){
987
error(0, errno, "add_argument");
786
perror("add_argument");
988
787
}
989
788
}
990
789
/* Add global environment variables */
991
790
for(char **e = g->environ; *e != NULL; e++){
992
791
if(not add_environment(p, *e, false)){
993
error(0, errno, "add_environment");
792
perror("add_environment");
994
793
}
995
794
}
996
795
}
1001
800
if(p->environ[0] != NULL){
1002
801
for(char **e = environ; *e != NULL; e++){
1003
802
if(not add_environment(p, *e, false)){
1004
error(0, errno, "add_environment");
803
perror("add_environment");
1005
804
}
1006
805
}
1007
806
}
1008
807
1009
808
int pipefd[2];
1010
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1011
if(ret == -1){
1012
error(0, errno, "pipe");
1013
exitstatus = EX_OSERR;
809
ret = pipe(pipefd);
810
if (ret == -1){
811
perror("pipe");
812
exitstatus = EXIT_FAILURE;
1014
813
goto fallback;
1015
814
}
1016
815
/* Ask OS to automatic close the pipe on exec */
1017
816
ret = set_cloexec_flag(pipefd[0]);
1018
817
if(ret < 0){
1019
error(0, errno, "set_cloexec_flag");
1020
exitstatus = EX_OSERR;
818
perror("set_cloexec_flag");
819
exitstatus = EXIT_FAILURE;
1021
820
goto fallback;
1022
821
}
1023
822
ret = set_cloexec_flag(pipefd[1]);
1024
823
if(ret < 0){
1025
error(0, errno, "set_cloexec_flag");
1026
exitstatus = EX_OSERR;
824
perror("set_cloexec_flag");
825
exitstatus = EXIT_FAILURE;
1027
826
goto fallback;
1028
827
}
1029
828
/* 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));
829
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1033
830
if(ret < 0){
1034
error(0, errno, "sigprocmask");
1035
exitstatus = EX_OSERR;
831
perror("sigprocmask");
832
exitstatus = EXIT_FAILURE;
1036
833
goto fallback;
1037
834
}
1038
835
/* Starting a new process to be watched */
1039
pid_t pid;
1040
do {
1041
pid = fork();
1042
} while(pid == -1 and errno == EINTR);
836
pid_t pid = fork();
1043
837
if(pid == -1){
1044
error(0, errno, "fork");
1045
exitstatus = EX_OSERR;
838
perror("fork");
839
exitstatus = EXIT_FAILURE;
1046
840
goto fallback;
1047
841
}
1048
842
if(pid == 0){
1049
843
/* this is the child process */
1050
844
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1051
845
if(ret < 0){
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
846
perror("sigaction");
847
_exit(EXIT_FAILURE);
1054
848
}
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
849
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1056
850
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
851
perror("sigprocmask");
852
_exit(EXIT_FAILURE);
1059
853
}
1060
854
1061
855
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1062
856
if(ret == -1){
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
857
perror("dup2");
858
_exit(EXIT_FAILURE);
1065
859
}
1066
860
1067
861
if(dirfd(dir) < 0){
1071
865
}
1072
866
if(p->environ[0] == NULL){
1073
867
if(execv(filename, p->argv) < 0){
1074
error(0, errno, "execv for %s", filename);
1075
_exit(EX_OSERR);
868
perror("execv");
869
_exit(EXIT_FAILURE);
1076
870
}
1077
871
} else {
1078
872
if(execve(filename, p->argv, p->environ) < 0){
1079
error(0, errno, "execve for %s", filename);
1080
_exit(EX_OSERR);
873
perror("execve");
874
_exit(EXIT_FAILURE);
1081
875
}
1082
876
}
1083
877
/* no return */
1084
878
}
1085
879
/* Parent process */
1086
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1087
pipe */
880
close(pipefd[1]); /* Close unused write end of pipe */
1088
881
free(filename);
1089
882
plugin *new_plugin = getplugin(dirst->d_name);
1090
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)));
883
if (new_plugin == NULL){
884
perror("getplugin");
885
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1095
886
if(ret < 0){
1096
error(0, errno, "sigprocmask");
887
perror("sigprocmask");
1097
888
}
1098
exitstatus = EX_OSERR;
889
exitstatus = EXIT_FAILURE;
1099
890
goto fallback;
1100
891
}
1101
892
1104
895
1105
896
/* Unblock SIGCHLD so signal handler can be run if this process
1106
897
has already completed */
1107
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1108
&sigchld_action.sa_mask,
1109
NULL));
898
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1110
899
if(ret < 0){
1111
error(0, errno, "sigprocmask");
1112
exitstatus = EX_OSERR;
900
perror("sigprocmask");
901
exitstatus = EXIT_FAILURE;
1113
902
goto fallback;
1114
903
}
1115
904
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
905
FD_SET(new_plugin->fd, &rfds_all);
1130
906
1131
if(maxfd < new_plugin->fd){
907
if (maxfd < new_plugin->fd){
1132
908
maxfd = new_plugin->fd;
1133
909
}
910
1134
911
}
1135
912
1136
TEMP_FAILURE_RETRY(closedir(dir));
913
closedir(dir);
1137
914
dir = NULL;
1138
free_plugin(getplugin(NULL));
1139
915
1140
916
for(plugin *p = plugin_list; p != NULL; p = p->next){
1141
917
if(p->pid != 0){
1142
918
break;
1147
923
free_plugin_list();
1148
924
}
1149
925
}
1150
926
1151
927
/* Main loop while running plugins exist */
1152
928
while(plugin_list){
1153
929
fd_set rfds = rfds_all;
1154
930
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;
931
if (select_ret == -1){
932
perror("select");
933
exitstatus = EXIT_FAILURE;
1158
934
goto fallback;
1159
935
}
1160
936
/* OK, now either a process completed, or something can be read
1161
937
from one of them */
1162
938
for(plugin *proc = plugin_list; proc != NULL;){
1163
939
/* Is this process completely done? */
1164
if(proc->completed and proc->eof){
940
if(proc->eof and proc->completed){
1165
941
/* Only accept the plugin output if it exited cleanly */
1166
942
if(not WIFEXITED(proc->status)
1167
943
or WEXITSTATUS(proc->status) != 0){
1168
944
/* Bad exit by plugin */
1169
945
1170
946
if(debug){
1171
947
if(WIFEXITED(proc->status)){
1172
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1173
" status %d\n", proc->name,
1174
(intmax_t) (proc->pid),
948
fprintf(stderr, "Plugin %u exited with status %d\n",
949
(unsigned int) (proc->pid),
1175
950
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)));
951
} else if(WIFSIGNALED(proc->status)) {
952
fprintf(stderr, "Plugin %u killed by signal %d\n",
953
(unsigned int) (proc->pid),
954
WTERMSIG(proc->status));
1182
955
} else if(WCOREDUMP(proc->status)){
1183
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1184
" core\n", proc->name, (intmax_t) (proc->pid));
956
fprintf(stderr, "Plugin %d dumped core\n",
957
(unsigned int) (proc->pid));
1185
958
}
1186
959
}
1187
960
1188
961
/* 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
962
FD_CLR(proc->fd, &rfds_all);
963
1204
964
/* Block signal while modifying process_list */
1205
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1206
(SIG_BLOCK,
1207
&sigchld_action.sa_mask,
1208
NULL));
1209
if(ret < 0){
1210
error(0, errno, "sigprocmask");
1211
exitstatus = EX_OSERR;
1212
goto fallback;
965
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
966
if(ret < 0){
967
perror("sigprocmask");
968
exitstatus = EXIT_FAILURE;
969
goto fallback;
970
}
971
972
/* We are done modifying process list, so unblock signal */
973
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
974
NULL);
975
if(ret < 0){
976
perror("sigprocmask");
977
exitstatus = EXIT_FAILURE;
978
goto fallback;
979
}
980
981
if(plugin_list == NULL){
982
break;
1213
983
}
1214
984
1215
985
plugin *next_plugin = proc->next;
1216
986
free_plugin(proc);
1217
987
proc = next_plugin;
1218
1219
/* 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)));
1223
if(ret < 0){
1224
error(0, errno, "sigprocmask");
1225
exitstatus = EX_OSERR;
1226
goto fallback;
1227
}
1228
1229
if(plugin_list == NULL){
1230
break;
1231
}
1232
1233
988
continue;
1234
989
}
1235
990
1236
991
/* This process exited nicely, so print its buffer */
1237
992
1238
993
bool bret = print_out_password(proc->buffer,
1239
994
proc->buffer_length);
1240
995
if(not bret){
1241
error(0, errno, "print_out_password");
1242
exitstatus = EX_IOERR;
996
perror("print_out_password");
997
exitstatus = EXIT_FAILURE;
1243
998
}
1244
999
goto fallback;
1245
1000
}
1246
1001
1247
1002
/* 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
1003
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1265
1004
/* This process had nothing to say at this time */
1266
1005
proc = proc->next;
1267
1006
continue;
1268
1007
}
1269
1008
/* Before reading, make the process' data buffer large enough */
1270
1009
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;
1010
proc->buffer = realloc(proc->buffer, proc->buffer_size
1011
+ (size_t) BUFFER_SIZE);
1012
if (proc->buffer == NULL){
1013
perror("malloc");
1014
exitstatus = EXIT_FAILURE;
1276
1015
goto fallback;
1277
1016
}
1278
proc->buffer = new_buffer;
1279
1017
proc->buffer_size += BUFFER_SIZE;
1280
1018
}
1281
1019
/* Read from the process */
1282
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1283
proc->buffer
1284
+ proc->buffer_length,
1285
BUFFER_SIZE));
1286
if(sret < 0){
1020
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1021
BUFFER_SIZE);
1022
if(ret < 0){
1287
1023
/* Read error from this process; ignore the error */
1288
1024
proc = proc->next;
1289
1025
continue;
1290
1026
}
1291
if(sret == 0){
1027
if(ret == 0){
1292
1028
/* got EOF */
1293
1029
proc->eof = true;
1294
1030
} else {
1295
proc->buffer_length += (size_t) sret;
1031
proc->buffer_length += (size_t) ret;
1296
1032
}
1297
1033
}
1298
1034
}
1299
1300
1035
1036
1301
1037
fallback:
1302
1038
1303
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1304
and exitstatus != EX_OK)){
1039
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1305
1040
/* Fallback if all plugins failed, none are found or an error
1306
1041
occured */
1307
1042
bool bret;
1315
1050
}
1316
1051
bret = print_out_password(passwordbuffer, len);
1317
1052
if(not bret){
1318
error(0, errno, "print_out_password");
1319
exitstatus = EX_IOERR;
1053
perror("print_out_password");
1054
exitstatus = EXIT_FAILURE;
1320
1055
}
1321
1056
}
1322
1057
1323
1058
/* Restore old signal handler */
1324
1059
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1325
1060
if(ret == -1){
1326
error(0, errno, "sigaction");
1327
exitstatus = EX_OSERR;
1061
perror("sigaction");
1062
exitstatus = EXIT_FAILURE;
1328
1063
}
1329
1064
1330
1065
if(custom_argv != NULL){
1331
1066
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1332
1067
free(*arg);
1338
1073
closedir(dir);
1339
1074
}
1340
1075
1341
/* Kill the processes */
1076
/* Free the process list and kill the processes */
1342
1077
for(plugin *p = plugin_list; p != NULL; p = p->next){
1343
1078
if(p->pid != 0){
1344
1079
close(p->fd);
1345
1080
ret = kill(p->pid, SIGTERM);
1346
1081
if(ret == -1 and errno != ESRCH){
1347
1082
/* Set-uid proccesses might not get closed */
1348
error(0, errno, "kill");
1083
perror("kill");
1349
1084
}
1350
1085
}
1351
1086
}
1352
1087
1353
1088
/* Wait for any remaining child processes to terminate */
1354
do {
1089
do{
1355
1090
ret = wait(NULL);
1356
1091
} while(ret >= 0);
1357
1092
if(errno != ECHILD){
1358
error(0, errno, "wait");
1093
perror("wait");
1359
1094
}
1360
1095
1361
1096
free_plugin_list();
1362
1097
1363
1098
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0