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- Committer: Teddy Hogeborn
- Date: 2009-01-15 05:27:55 UTC
- mfrom: (237.2.9 mandos-release)
- Revision ID: teddy@fukt.bsnet.se-20090115052755-luw0gjx8727p24o3
Merge from release branch.
- 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
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(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* DIR, fdopendir(), fstat(), struct
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
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() */
43
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
WEXITSTATUS() */
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
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
48
FD_CLOEXEC, write(), STDOUT_FILENO,
49
struct stat, fstat(), close(),
50
setgid(), setuid(), S_ISREG(),
51
faccessat() pipe(), fork(),
52
_exit(), dup2(), fexecve(), read()
53
*/
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
47
fcntl(), setuid(), setgid(),
48
F_GETFD, F_SETFD, FD_CLOEXEC,
49
access(), pipe(), fork(), close()
50
dup2(), STDOUT_FILENO, _exit(),
51
execv(), write(), read(),
52
close() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC, openat() */
56
#include <string.h> /* strsep, strlen(), strsignal(),
57
strcmp(), strncmp() */
54
FD_CLOEXEC */
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
free(new_plugin);
133
errno = e;
134
118
return NULL;
135
119
}
136
120
}
137
121
138
*new_plugin = (plugin){ .name = copy_name,
139
.argc = 1,
140
.disabled = false,
141
.next = plugin_list };
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
142
126
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
127
new_plugin->argv = malloc(sizeof(char *) * 2);
146
128
if(new_plugin->argv == NULL){
147
int e = errno;
148
129
free(copy_name);
149
130
free(new_plugin);
150
errno = e;
151
131
return NULL;
152
132
}
153
133
new_plugin->argv[0] = copy_name;
154
134
new_plugin->argv[1] = NULL;
155
135
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
136
new_plugin->environ = malloc(sizeof(char *));
159
137
if(new_plugin->environ == NULL){
160
int e = errno;
161
138
free(copy_name);
162
139
free(new_plugin->argv);
163
140
free(new_plugin);
164
errno = e;
165
141
return NULL;
166
142
}
167
143
new_plugin->environ[0] = NULL;
172
148
}
173
149
174
150
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
151
static bool add_to_char_array(const char *new, char ***array,
177
152
int *len){
178
153
/* 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);
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
184
156
/* Malloc check */
185
if(new_array == NULL){
157
if(*array == NULL){
186
158
return false;
187
159
}
188
*array = new_array;
189
160
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
161
char *copy = strdup(new);
194
162
if(copy == NULL){
195
163
return false;
196
164
}
203
171
}
204
172
205
173
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
174
static bool add_argument(plugin *p, const char *arg){
208
175
if(p == NULL){
209
176
return false;
212
179
}
213
180
214
181
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
182
static bool add_environment(plugin *p, const char *def, bool replace){
217
183
if(p == NULL){
218
184
return false;
220
186
/* namelen = length of name of environment variable */
221
187
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
188
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen + 1) == 0){
225
191
/* It already exists */
226
192
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){
193
char *new = realloc(*e, strlen(def) + 1);
194
if(new == NULL){
232
195
return false;
233
196
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
197
*e = new;
198
strcpy(*e, def);
236
199
}
237
200
return true;
238
201
}
243
206
/*
244
207
* Based on the example in the GNU LibC manual chapter 13.13 "File
245
208
* Descriptor Flags".
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
247
210
*/
248
__attribute__((warn_unused_result))
249
211
static int set_cloexec_flag(int fd){
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
212
int ret = fcntl(fd, F_GETFD, 0);
251
213
/* If reading the flags failed, return error indication now. */
252
214
if(ret < 0){
253
215
return ret;
254
216
}
255
217
/* Store modified flag word in the descriptor. */
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
257
ret | FD_CLOEXEC));
218
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
219
}
259
220
260
221
261
222
/* Mark processes as completed when they exit, and save their exit
262
223
status. */
263
224
static void handle_sigchld(__attribute__((unused)) int sig){
264
int old_errno = errno;
265
225
while(true){
266
226
plugin *proc = plugin_list;
267
227
int status;
271
231
break;
272
232
}
273
233
if(pid == -1){
274
if(errno == ECHILD){
275
/* No child processes */
276
break;
234
if(errno != ECHILD){
235
perror("waitpid");
277
236
}
278
error(0, errno, "waitpid");
237
/* No child processes */
238
break;
279
239
}
280
240
281
241
/* A child exited, find it in process_list */
287
247
continue;
288
248
}
289
249
proc->status = status;
290
proc->completed = 1;
250
proc->completed = true;
291
251
}
292
errno = old_errno;
293
252
}
294
253
295
254
/* Prints out a password to stdout */
296
__attribute__((nonnull, warn_unused_result))
297
255
static bool print_out_password(const char *buffer, size_t length){
298
256
ssize_t ret;
299
257
for(size_t written = 0; written < length; written += (size_t)ret){
307
265
}
308
266
309
267
/* Removes and free a plugin from the plugin list */
310
__attribute__((nonnull))
311
268
static void free_plugin(plugin *plugin_node){
312
269
313
270
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
319
276
}
320
277
free(plugin_node->environ);
321
278
free(plugin_node->buffer);
322
279
323
280
/* Removes the plugin from the singly-linked list */
324
281
if(plugin_node == plugin_list){
325
282
/* First one - simple */
352
309
struct dirent *dirst;
353
310
struct stat st;
354
311
fd_set rfds_all;
355
int ret, maxfd = 0;
312
int ret, numchars, maxfd = 0;
356
313
ssize_t sret;
314
intmax_t tmpmax;
357
315
uid_t uid = 65534;
358
316
gid_t gid = 65534;
359
317
bool debug = false;
363
321
.sa_flags = SA_NOCLDSTOP };
364
322
char **custom_argv = NULL;
365
323
int custom_argc = 0;
366
int dir_fd;
367
324
368
325
/* Establish a signal handler */
369
326
sigemptyset(&sigchld_action.sa_mask);
370
327
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
371
328
if(ret == -1){
372
error(0, errno, "sigaddset");
373
exitstatus = EX_OSERR;
329
perror("sigaddset");
330
exitstatus = EXIT_FAILURE;
374
331
goto fallback;
375
332
}
376
333
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
377
334
if(ret == -1){
378
error(0, errno, "sigaction");
379
exitstatus = EX_OSERR;
335
perror("sigaction");
336
exitstatus = EXIT_FAILURE;
380
337
goto fallback;
381
338
}
382
339
414
371
.doc = "Group ID the plugins will run as", .group = 3 },
415
372
{ .name = "debug", .key = 132,
416
373
.doc = "Debug mode", .group = 4 },
417
/*
418
* These reproduce what we would get without ARGP_NO_HELP
419
*/
420
{ .name = "help", .key = '?',
421
.doc = "Give this help list", .group = -1 },
422
{ .name = "usage", .key = -3,
423
.doc = "Give a short usage message", .group = -1 },
424
{ .name = "version", .key = 'V',
425
.doc = "Print program version", .group = -1 },
426
374
{ .name = NULL }
427
375
};
428
376
429
__attribute__((nonnull(3)))
430
error_t parse_opt(int key, char *arg, struct argp_state *state){
431
errno = 0;
432
switch(key){
433
char *tmp;
434
intmax_t tmp_id;
377
error_t parse_opt(int key, char *arg, __attribute__((unused))
378
struct argp_state *state) {
379
switch(key) {
435
380
case 'g': /* --global-options */
436
{
437
char *plugin_option;
438
while((plugin_option = strsep(&arg, ",")) != NULL){
439
if(not add_argument(getplugin(NULL), plugin_option)){
440
break;
381
if(arg != NULL){
382
char *p;
383
while((p = strsep(&arg, ",")) != NULL){
384
if(p[0] == '\0'){
385
continue;
386
}
387
if(not add_argument(getplugin(NULL), p)){
388
perror("add_argument");
389
return ARGP_ERR_UNKNOWN;
441
390
}
442
391
}
443
errno = 0;
444
392
}
445
393
break;
446
394
case 'G': /* --global-env */
447
if(add_environment(getplugin(NULL), arg, true)){
448
errno = 0;
395
if(arg == NULL){
396
break;
397
}
398
if(not add_environment(getplugin(NULL), arg, true)){
399
perror("add_environment");
449
400
}
450
401
break;
451
402
case 'o': /* --options-for */
452
{
453
char *option_list = strchr(arg, ':');
454
if(option_list == NULL){
455
argp_error(state, "No colon in \"%s\"", arg);
456
errno = EINVAL;
457
break;
458
}
459
*option_list = '\0';
460
option_list++;
461
if(arg[0] == '\0'){
462
argp_error(state, "Empty plugin name");
463
errno = EINVAL;
464
break;
465
}
466
char *option;
467
while((option = strsep(&option_list, ",")) != NULL){
468
if(not add_argument(getplugin(arg), option)){
469
break;
470
}
471
}
472
errno = 0;
403
if(arg != NULL){
404
char *p_name = strsep(&arg, ":");
405
if(p_name[0] == '\0' or arg == NULL){
406
break;
407
}
408
char *opt = strsep(&arg, ":");
409
if(opt[0] == '\0' or opt == NULL){
410
break;
411
}
412
char *p;
413
while((p = strsep(&opt, ",")) != NULL){
414
if(p[0] == '\0'){
415
continue;
416
}
417
if(not add_argument(getplugin(p_name), p)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
420
}
421
}
473
422
}
474
423
break;
475
424
case 'E': /* --env-for */
425
if(arg == NULL){
426
break;
427
}
476
428
{
477
429
char *envdef = strchr(arg, ':');
478
430
if(envdef == NULL){
479
argp_error(state, "No colon in \"%s\"", arg);
480
errno = EINVAL;
481
431
break;
482
432
}
483
433
*envdef = '\0';
484
envdef++;
485
if(arg[0] == '\0'){
486
argp_error(state, "Empty plugin name");
487
errno = EINVAL;
488
break;
489
}
490
if(add_environment(getplugin(arg), envdef, true)){
491
errno = 0;
434
if(not add_environment(getplugin(arg), envdef+1, true)){
435
perror("add_environment");
492
436
}
493
437
}
494
438
break;
495
439
case 'd': /* --disable */
496
{
440
if(arg != NULL){
497
441
plugin *p = getplugin(arg);
498
if(p != NULL){
499
p->disabled = true;
500
errno = 0;
442
if(p == NULL){
443
return ARGP_ERR_UNKNOWN;
501
444
}
445
p->disabled = true;
502
446
}
503
447
break;
504
448
case 'e': /* --enable */
505
{
449
if(arg != NULL){
506
450
plugin *p = getplugin(arg);
507
if(p != NULL){
508
p->disabled = false;
509
errno = 0;
451
if(p == NULL){
452
return ARGP_ERR_UNKNOWN;
510
453
}
454
p->disabled = false;
511
455
}
512
456
break;
513
457
case 128: /* --plugin-dir */
514
458
free(plugindir);
515
459
plugindir = strdup(arg);
516
if(plugindir != NULL){
517
errno = 0;
518
}
460
if(plugindir == NULL){
461
perror("strdup");
462
}
519
463
break;
520
464
case 129: /* --config-file */
521
465
/* This is already done by parse_opt_config_file() */
522
466
break;
523
467
case 130: /* --userid */
524
tmp_id = strtoimax(arg, &tmp, 10);
525
if(errno != 0 or tmp == arg or *tmp != '\0'
526
or tmp_id != (uid_t)tmp_id){
527
argp_error(state, "Bad user ID number: \"%s\", using %"
528
PRIdMAX, arg, (intmax_t)uid);
529
break;
468
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
469
if(ret < 1 or tmpmax != (uid_t)tmpmax
470
or arg[numchars] != '\0'){
471
fprintf(stderr, "Bad user ID number: \"%s\", using %"
472
PRIdMAX "\n", arg, (intmax_t)uid);
473
} else {
474
uid = (uid_t)tmpmax;
530
475
}
531
uid = (uid_t)tmp_id;
532
errno = 0;
533
476
break;
534
477
case 131: /* --groupid */
535
tmp_id = strtoimax(arg, &tmp, 10);
536
if(errno != 0 or tmp == arg or *tmp != '\0'
537
or tmp_id != (gid_t)tmp_id){
538
argp_error(state, "Bad group ID number: \"%s\", using %"
539
PRIdMAX, arg, (intmax_t)gid);
540
break;
478
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
479
if(ret < 1 or tmpmax != (gid_t)tmpmax
480
or arg[numchars] != '\0'){
481
fprintf(stderr, "Bad group ID number: \"%s\", using %"
482
PRIdMAX "\n", arg, (intmax_t)gid);
483
} else {
484
gid = (gid_t)tmpmax;
541
485
}
542
gid = (gid_t)tmp_id;
543
errno = 0;
544
486
break;
545
487
case 132: /* --debug */
546
488
debug = true;
547
489
break;
548
/*
549
* These reproduce what we would get without ARGP_NO_HELP
550
*/
551
case '?': /* --help */
552
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
553
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
554
case -3: /* --usage */
555
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
556
argp_state_help(state, state->out_stream,
557
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
558
case 'V': /* --version */
559
fprintf(state->out_stream, "%s\n", argp_program_version);
560
exit(EXIT_SUCCESS);
561
break;
562
490
/*
563
491
* When adding more options before this line, remember to also add a
564
492
* "case" to the "parse_opt_config_file" function below.
567
495
/* Cryptsetup always passes an argument, which is an empty
568
496
string if "none" was specified in /etc/crypttab. So if
569
497
argument was empty, we ignore it silently. */
570
if(arg[0] == '\0'){
571
break;
498
if(arg[0] != '\0'){
499
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
572
500
}
501
break;
502
case ARGP_KEY_END:
503
break;
573
504
default:
574
505
return ARGP_ERR_UNKNOWN;
575
506
}
576
return errno; /* Set to 0 at start */
507
return 0;
577
508
}
578
509
579
510
/* This option parser is the same as parse_opt() above, except it
580
511
ignores everything but the --config-file option. */
581
512
error_t parse_opt_config_file(int key, char *arg,
582
513
__attribute__((unused))
583
struct argp_state *state){
584
errno = 0;
585
switch(key){
514
struct argp_state *state) {
515
switch(key) {
586
516
case 'g': /* --global-options */
587
517
case 'G': /* --global-env */
588
518
case 'o': /* --options-for */
594
524
case 129: /* --config-file */
595
525
free(argfile);
596
526
argfile = strdup(arg);
597
if(argfile != NULL){
598
errno = 0;
527
if(argfile == NULL){
528
perror("strdup");
599
529
}
600
break;
530
break;
601
531
case 130: /* --userid */
602
532
case 131: /* --groupid */
603
533
case 132: /* --debug */
604
case '?': /* --help */
605
case -3: /* --usage */
606
case 'V': /* --version */
607
534
case ARGP_KEY_ARG:
535
case ARGP_KEY_END:
608
536
break;
609
537
default:
610
538
return ARGP_ERR_UNKNOWN;
611
539
}
612
return errno;
540
return 0;
613
541
}
614
542
615
543
struct argp argp = { .options = options,
619
547
620
548
/* Parse using parse_opt_config_file() in order to get the custom
621
549
config file location, if any. */
622
ret = argp_parse(&argp, argc, argv,
623
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
624
NULL, NULL);
625
switch(ret){
626
case 0:
627
break;
628
case ENOMEM:
629
default:
630
errno = ret;
631
error(0, errno, "argp_parse");
632
exitstatus = EX_OSERR;
633
goto fallback;
634
case EINVAL:
635
exitstatus = EX_USAGE;
550
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
551
if(ret == ARGP_ERR_UNKNOWN){
552
fprintf(stderr, "Unknown error while parsing arguments\n");
553
exitstatus = EXIT_FAILURE;
636
554
goto fallback;
637
555
}
638
556
644
562
conffp = fopen(AFILE, "r");
645
563
} else {
646
564
conffp = fopen(argfile, "r");
647
}
565
}
648
566
if(conffp != NULL){
649
567
char *org_line = NULL;
650
568
char *p, *arg, *new_arg, *line;
651
569
size_t size = 0;
652
570
const char whitespace_delims[] = " \r\t\f\v\n";
653
571
const char comment_delim[] = "#";
654
572
655
573
custom_argc = 1;
656
574
custom_argv = malloc(sizeof(char*) * 2);
657
575
if(custom_argv == NULL){
658
error(0, errno, "malloc");
659
exitstatus = EX_OSERR;
576
perror("malloc");
577
exitstatus = EXIT_FAILURE;
660
578
goto fallback;
661
579
}
662
580
custom_argv[0] = argv[0];
663
581
custom_argv[1] = NULL;
664
582
665
583
/* for each line in the config file, strip whitespace and ignore
666
584
commented text */
667
585
while(true){
669
587
if(sret == -1){
670
588
break;
671
589
}
672
590
673
591
line = org_line;
674
592
arg = strsep(&line, comment_delim);
675
593
while((p = strsep(&arg, whitespace_delims)) != NULL){
678
596
}
679
597
new_arg = strdup(p);
680
598
if(new_arg == NULL){
681
error(0, errno, "strdup");
682
exitstatus = EX_OSERR;
599
perror("strdup");
600
exitstatus = EXIT_FAILURE;
683
601
free(org_line);
684
602
goto fallback;
685
603
}
686
604
687
605
custom_argc += 1;
688
{
689
char **new_argv = realloc(custom_argv, sizeof(char *)
690
* ((unsigned int)
691
custom_argc + 1));
692
if(new_argv == NULL){
693
error(0, errno, "realloc");
694
exitstatus = EX_OSERR;
695
free(new_arg);
696
free(org_line);
697
goto fallback;
698
} else {
699
custom_argv = new_argv;
700
}
606
custom_argv = realloc(custom_argv, sizeof(char *)
607
* ((unsigned int) custom_argc + 1));
608
if(custom_argv == NULL){
609
perror("realloc");
610
exitstatus = EXIT_FAILURE;
611
free(org_line);
612
goto fallback;
701
613
}
702
614
custom_argv[custom_argc-1] = new_arg;
703
custom_argv[custom_argc] = NULL;
615
custom_argv[custom_argc] = NULL;
704
616
}
705
617
}
706
do {
707
ret = fclose(conffp);
708
} while(ret == EOF and errno == EINTR);
709
if(ret == EOF){
710
error(0, errno, "fclose");
711
exitstatus = EX_IOERR;
712
goto fallback;
713
}
714
618
free(org_line);
715
619
} else {
716
620
/* Check for harmful errors and go to fallback. Other errors might
717
621
not affect opening plugins */
718
622
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
719
error(0, errno, "fopen");
720
exitstatus = EX_OSERR;
623
perror("fopen");
624
exitstatus = EXIT_FAILURE;
721
625
goto fallback;
722
626
}
723
627
}
724
/* If there were any arguments from the configuration file, pass
725
them to parser as command line arguments */
628
/* If there was any arguments from configuration file,
629
pass them to parser as command arguments */
726
630
if(custom_argv != NULL){
727
ret = argp_parse(&argp, custom_argc, custom_argv,
728
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
729
NULL, NULL);
730
switch(ret){
731
case 0:
732
break;
733
case ENOMEM:
734
default:
735
errno = ret;
736
error(0, errno, "argp_parse");
737
exitstatus = EX_OSERR;
738
goto fallback;
739
case EINVAL:
740
exitstatus = EX_CONFIG;
631
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
632
0, NULL);
633
if(ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
exitstatus = EXIT_FAILURE;
741
636
goto fallback;
742
637
}
743
638
}
744
639
745
640
/* Parse actual command line arguments, to let them override the
746
641
config file */
747
ret = argp_parse(&argp, argc, argv,
748
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
749
NULL, NULL);
750
switch(ret){
751
case 0:
752
break;
753
case ENOMEM:
754
default:
755
errno = ret;
756
error(0, errno, "argp_parse");
757
exitstatus = EX_OSERR;
758
goto fallback;
759
case EINVAL:
760
exitstatus = EX_USAGE;
642
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
761
646
goto fallback;
762
647
}
763
648
775
660
}
776
661
}
777
662
778
if(getuid() == 0){
779
/* Work around Debian bug #633582:
780
<http://bugs.debian.org/633582> */
781
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
782
if(plugindir_fd == -1){
783
if(errno != ENOENT){
784
error(0, errno, "open(\"" PDIR "\")");
785
}
786
} else {
787
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
788
if(ret == -1){
789
error(0, errno, "fstat");
790
} else {
791
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
792
ret = fchown(plugindir_fd, uid, gid);
793
if(ret == -1){
794
error(0, errno, "fchown");
795
}
796
}
797
}
798
TEMP_FAILURE_RETRY(close(plugindir_fd));
799
}
800
}
801
802
/* Lower permissions */
803
ret = setgid(gid);
804
if(ret == -1){
805
error(0, errno, "setgid");
806
}
663
/* Strip permissions down to nobody */
807
664
ret = setuid(uid);
808
665
if(ret == -1){
809
error(0, errno, "setuid");
810
}
811
812
/* Open plugin directory with close_on_exec flag */
666
perror("setuid");
667
}
668
setgid(gid);
669
if(ret == -1){
670
perror("setgid");
671
}
672
673
if(plugindir == NULL){
674
dir = opendir(PDIR);
675
} else {
676
dir = opendir(plugindir);
677
}
678
679
if(dir == NULL){
680
perror("Could not open plugin dir");
681
exitstatus = EXIT_FAILURE;
682
goto fallback;
683
}
684
685
/* Set the FD_CLOEXEC flag on the directory, if possible */
813
686
{
814
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
815
#ifdef O_CLOEXEC
816
O_CLOEXEC
817
#else /* not O_CLOEXEC */
818
0
819
#endif /* not O_CLOEXEC */
820
);
821
if(dir_fd == -1){
822
error(0, errno, "Could not open plugin dir");
823
exitstatus = EX_UNAVAILABLE;
824
goto fallback;
825
}
826
827
#ifndef O_CLOEXEC
828
/* Set the FD_CLOEXEC flag on the directory */
829
ret = set_cloexec_flag(dir_fd);
830
if(ret < 0){
831
error(0, errno, "set_cloexec_flag");
832
TEMP_FAILURE_RETRY(close(dir_fd));
833
exitstatus = EX_OSERR;
834
goto fallback;
835
}
836
#endif /* O_CLOEXEC */
837
838
dir = fdopendir(dir_fd);
839
if(dir == NULL){
840
error(0, errno, "Could not open plugin dir");
841
TEMP_FAILURE_RETRY(close(dir_fd));
842
exitstatus = EX_OSERR;
843
goto fallback;
687
int dir_fd = dirfd(dir);
688
if(dir_fd >= 0){
689
ret = set_cloexec_flag(dir_fd);
690
if(ret < 0){
691
perror("set_cloexec_flag");
692
exitstatus = EXIT_FAILURE;
693
goto fallback;
694
}
844
695
}
845
696
}
846
697
848
699
849
700
/* Read and execute any executable in the plugin directory*/
850
701
while(true){
851
do {
852
dirst = readdir(dir);
853
} while(dirst == NULL and errno == EINTR);
702
dirst = readdir(dir);
854
703
855
704
/* All directory entries have been processed */
856
705
if(dirst == NULL){
857
706
if(errno == EBADF){
858
error(0, errno, "readdir");
859
exitstatus = EX_IOERR;
707
perror("readdir");
708
exitstatus = EXIT_FAILURE;
860
709
goto fallback;
861
710
}
862
711
break;
868
717
{
869
718
bool bad_name = false;
870
719
871
const char * const bad_prefixes[] = { ".", "#", NULL };
720
const char const *bad_prefixes[] = { ".", "#", NULL };
872
721
873
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
722
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
874
723
".dpkg-old",
875
724
".dpkg-bak",
876
725
".dpkg-divert", NULL };
877
#ifdef __GNUC__
878
#pragma GCC diagnostic push
879
#pragma GCC diagnostic ignored "-Wcast-qual"
880
#endif
881
for(const char **pre = (const char **)bad_prefixes;
882
*pre != NULL; pre++){
883
#ifdef __GNUC__
884
#pragma GCC diagnostic pop
885
#endif
726
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
886
727
size_t pre_len = strlen(*pre);
887
728
if((d_name_len >= pre_len)
888
729
and strncmp((dirst->d_name), *pre, pre_len) == 0){
897
738
if(bad_name){
898
739
continue;
899
740
}
900
#ifdef __GNUC__
901
#pragma GCC diagnostic push
902
#pragma GCC diagnostic ignored "-Wcast-qual"
903
#endif
904
for(const char **suf = (const char **)bad_suffixes;
905
*suf != NULL; suf++){
906
#ifdef __GNUC__
907
#pragma GCC diagnostic pop
908
#endif
741
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
909
742
size_t suf_len = strlen(*suf);
910
743
if((d_name_len >= suf_len)
911
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
744
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
912
745
== 0)){
913
746
if(debug){
914
747
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
923
756
continue;
924
757
}
925
758
}
926
927
int plugin_fd = openat(dir_fd, dirst->d_name, O_RDONLY |
928
#ifdef O_CLOEXEC
929
O_CLOEXEC
930
#else /* not O_CLOEXEC */
931
0
932
#endif /* not O_CLOEXEC */
933
);
934
if(plugin_fd == -1){
935
error(0, errno, "Could not open plugin");
936
continue;
759
760
char *filename;
761
if(plugindir == NULL){
762
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
763
} else {
764
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
937
765
}
938
#ifndef O_CLOEXEC
939
/* Set the FD_CLOEXEC flag on the plugin FD */
940
ret = set_cloexec_flag(plugin_fd);
941
766
if(ret < 0){
942
error(0, errno, "set_cloexec_flag");
943
TEMP_FAILURE_RETRY(close(plugin_fd));
767
perror("asprintf");
944
768
continue;
945
769
}
946
#endif /* O_CLOEXEC */
947
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
770
771
ret = stat(filename, &st);
948
772
if(ret == -1){
949
error(0, errno, "stat");
950
TEMP_FAILURE_RETRY(close(plugin_fd));
773
perror("stat");
774
free(filename);
951
775
continue;
952
776
}
953
777
954
778
/* Ignore non-executable files */
955
if(not S_ISREG(st.st_mode)
956
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, dirst->d_name, X_OK,
957
0)) != 0)){
779
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
958
780
if(debug){
959
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
960
" with bad type or mode\n",
961
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
781
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
782
" with bad type or mode\n", filename);
962
783
}
963
TEMP_FAILURE_RETRY(close(plugin_fd));
784
free(filename);
964
785
continue;
965
786
}
966
787
967
788
plugin *p = getplugin(dirst->d_name);
968
789
if(p == NULL){
969
error(0, errno, "getplugin");
970
TEMP_FAILURE_RETRY(close(plugin_fd));
790
perror("getplugin");
791
free(filename);
971
792
continue;
972
793
}
973
794
if(p->disabled){
975
796
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
976
797
dirst->d_name);
977
798
}
978
TEMP_FAILURE_RETRY(close(plugin_fd));
799
free(filename);
979
800
continue;
980
801
}
981
802
{
984
805
if(g != NULL){
985
806
for(char **a = g->argv + 1; *a != NULL; a++){
986
807
if(not add_argument(p, *a)){
987
error(0, errno, "add_argument");
808
perror("add_argument");
988
809
}
989
810
}
990
811
/* Add global environment variables */
991
812
for(char **e = g->environ; *e != NULL; e++){
992
813
if(not add_environment(p, *e, false)){
993
error(0, errno, "add_environment");
814
perror("add_environment");
994
815
}
995
816
}
996
817
}
997
818
}
998
/* If this plugin has any environment variables, we need to
999
duplicate the environment from this process, too. */
819
/* If this plugin has any environment variables, we will call
820
using execve and need to duplicate the environment from this
821
process, too. */
1000
822
if(p->environ[0] != NULL){
1001
823
for(char **e = environ; *e != NULL; e++){
1002
824
if(not add_environment(p, *e, false)){
1003
error(0, errno, "add_environment");
825
perror("add_environment");
1004
826
}
1005
827
}
1006
828
}
1007
829
1008
830
int pipefd[2];
1009
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
831
ret = pipe(pipefd);
1010
832
if(ret == -1){
1011
error(0, errno, "pipe");
1012
exitstatus = EX_OSERR;
833
perror("pipe");
834
exitstatus = EXIT_FAILURE;
1013
835
goto fallback;
1014
836
}
1015
837
/* Ask OS to automatic close the pipe on exec */
1016
838
ret = set_cloexec_flag(pipefd[0]);
1017
839
if(ret < 0){
1018
error(0, errno, "set_cloexec_flag");
1019
exitstatus = EX_OSERR;
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1020
842
goto fallback;
1021
843
}
1022
844
ret = set_cloexec_flag(pipefd[1]);
1023
845
if(ret < 0){
1024
error(0, errno, "set_cloexec_flag");
1025
exitstatus = EX_OSERR;
846
perror("set_cloexec_flag");
847
exitstatus = EXIT_FAILURE;
1026
848
goto fallback;
1027
849
}
1028
850
/* Block SIGCHLD until process is safely in process list */
1029
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1030
&sigchld_action.sa_mask,
1031
NULL));
851
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1032
852
if(ret < 0){
1033
error(0, errno, "sigprocmask");
1034
exitstatus = EX_OSERR;
853
perror("sigprocmask");
854
exitstatus = EXIT_FAILURE;
1035
855
goto fallback;
1036
856
}
1037
857
/* Starting a new process to be watched */
1038
pid_t pid;
1039
do {
1040
pid = fork();
1041
} while(pid == -1 and errno == EINTR);
858
pid_t pid = fork();
1042
859
if(pid == -1){
1043
error(0, errno, "fork");
1044
exitstatus = EX_OSERR;
860
perror("fork");
861
exitstatus = EXIT_FAILURE;
1045
862
goto fallback;
1046
863
}
1047
864
if(pid == 0){
1048
865
/* this is the child process */
1049
866
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1050
867
if(ret < 0){
1051
error(0, errno, "sigaction");
1052
_exit(EX_OSERR);
868
perror("sigaction");
869
_exit(EXIT_FAILURE);
1053
870
}
1054
871
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1055
872
if(ret < 0){
1056
error(0, errno, "sigprocmask");
1057
_exit(EX_OSERR);
873
perror("sigprocmask");
874
_exit(EXIT_FAILURE);
1058
875
}
1059
876
1060
877
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1061
878
if(ret == -1){
1062
error(0, errno, "dup2");
1063
_exit(EX_OSERR);
879
perror("dup2");
880
_exit(EXIT_FAILURE);
1064
881
}
1065
882
1066
883
if(dirfd(dir) < 0){
1068
885
above and must now close it manually here. */
1069
886
closedir(dir);
1070
887
}
1071
if(fexecve(plugin_fd, p->argv,
1072
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1073
error(0, errno, "fexecve for %s/%s",
1074
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
1075
_exit(EX_OSERR);
888
if(p->environ[0] == NULL){
889
if(execv(filename, p->argv) < 0){
890
perror("execv");
891
_exit(EXIT_FAILURE);
892
}
893
} else {
894
if(execve(filename, p->argv, p->environ) < 0){
895
perror("execve");
896
_exit(EXIT_FAILURE);
897
}
1076
898
}
1077
899
/* no return */
1078
900
}
1079
901
/* Parent process */
1080
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1081
pipe */
1082
TEMP_FAILURE_RETRY(close(plugin_fd));
902
close(pipefd[1]); /* Close unused write end of pipe */
903
free(filename);
1083
904
plugin *new_plugin = getplugin(dirst->d_name);
1084
905
if(new_plugin == NULL){
1085
error(0, errno, "getplugin");
1086
ret = (int)(TEMP_FAILURE_RETRY
1087
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1088
NULL)));
906
perror("getplugin");
907
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
908
if(ret < 0){
1090
error(0, errno, "sigprocmask");
909
perror("sigprocmask");
1091
910
}
1092
exitstatus = EX_OSERR;
911
exitstatus = EXIT_FAILURE;
1093
912
goto fallback;
1094
913
}
1095
914
1098
917
1099
918
/* Unblock SIGCHLD so signal handler can be run if this process
1100
919
has already completed */
1101
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1102
&sigchld_action.sa_mask,
1103
NULL));
920
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1104
921
if(ret < 0){
1105
error(0, errno, "sigprocmask");
1106
exitstatus = EX_OSERR;
922
perror("sigprocmask");
923
exitstatus = EXIT_FAILURE;
1107
924
goto fallback;
1108
925
}
1109
926
1110
#if defined (__GNUC__) and defined (__GLIBC__)
1111
#if not __GLIBC_PREREQ(2, 16)
1112
#pragma GCC diagnostic push
1113
#pragma GCC diagnostic ignored "-Wsign-conversion"
1114
#endif
1115
#endif
1116
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1117
-Wconversion in GNU libc
1118
before 2.16 */
1119
#if defined (__GNUC__) and defined (__GLIBC__)
1120
#if not __GLIBC_PREREQ(2, 16)
1121
#pragma GCC diagnostic pop
1122
#endif
1123
#endif
927
FD_SET(new_plugin->fd, &rfds_all);
1124
928
1125
929
if(maxfd < new_plugin->fd){
1126
930
maxfd = new_plugin->fd;
1127
931
}
1128
932
}
1129
933
1130
TEMP_FAILURE_RETRY(closedir(dir));
934
closedir(dir);
1131
935
dir = NULL;
1132
free_plugin(getplugin(NULL));
1133
936
1134
937
for(plugin *p = plugin_list; p != NULL; p = p->next){
1135
938
if(p->pid != 0){
1146
949
while(plugin_list){
1147
950
fd_set rfds = rfds_all;
1148
951
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1149
if(select_ret == -1 and errno != EINTR){
1150
error(0, errno, "select");
1151
exitstatus = EX_OSERR;
952
if(select_ret == -1){
953
perror("select");
954
exitstatus = EXIT_FAILURE;
1152
955
goto fallback;
1153
956
}
1154
957
/* OK, now either a process completed, or something can be read
1155
958
from one of them */
1156
959
for(plugin *proc = plugin_list; proc != NULL;){
1157
960
/* Is this process completely done? */
1158
if(proc->completed and proc->eof){
961
if(proc->eof and proc->completed){
1159
962
/* Only accept the plugin output if it exited cleanly */
1160
963
if(not WIFEXITED(proc->status)
1161
964
or WEXITSTATUS(proc->status) != 0){
1162
965
/* Bad exit by plugin */
1163
966
1164
967
if(debug){
1165
968
if(WIFEXITED(proc->status)){
1166
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1167
" status %d\n", proc->name,
1168
(intmax_t) (proc->pid),
969
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
970
" %d\n", (intmax_t) (proc->pid),
1169
971
WEXITSTATUS(proc->status));
1170
} else if(WIFSIGNALED(proc->status)){
1171
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1172
" signal %d: %s\n", proc->name,
1173
(intmax_t) (proc->pid),
1174
WTERMSIG(proc->status),
1175
strsignal(WTERMSIG(proc->status)));
972
} else if(WIFSIGNALED(proc->status)) {
973
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
974
" %d\n", (intmax_t) (proc->pid),
975
WTERMSIG(proc->status));
1176
976
} else if(WCOREDUMP(proc->status)){
1177
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1178
" core\n", proc->name, (intmax_t) (proc->pid));
977
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
978
(intmax_t) (proc->pid));
1179
979
}
1180
980
}
1181
981
1182
982
/* Remove the plugin */
1183
#if defined (__GNUC__) and defined (__GLIBC__)
1184
#if not __GLIBC_PREREQ(2, 16)
1185
#pragma GCC diagnostic push
1186
#pragma GCC diagnostic ignored "-Wsign-conversion"
1187
#endif
1188
#endif
1189
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1190
-Wconversion in GNU libc
1191
before 2.16 */
1192
#if defined (__GNUC__) and defined (__GLIBC__)
1193
#if not __GLIBC_PREREQ(2, 16)
1194
#pragma GCC diagnostic pop
1195
#endif
1196
#endif
1197
983
FD_CLR(proc->fd, &rfds_all);
984
1198
985
/* Block signal while modifying process_list */
1199
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1200
(SIG_BLOCK,
1201
&sigchld_action.sa_mask,
1202
NULL));
986
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1203
987
if(ret < 0){
1204
error(0, errno, "sigprocmask");
1205
exitstatus = EX_OSERR;
988
perror("sigprocmask");
989
exitstatus = EXIT_FAILURE;
1206
990
goto fallback;
1207
991
}
1208
992
1211
995
proc = next_plugin;
1212
996
1213
997
/* We are done modifying process list, so unblock signal */
1214
ret = (int)(TEMP_FAILURE_RETRY
1215
(sigprocmask(SIG_UNBLOCK,
1216
&sigchld_action.sa_mask, NULL)));
998
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
999
NULL);
1217
1000
if(ret < 0){
1218
error(0, errno, "sigprocmask");
1219
exitstatus = EX_OSERR;
1001
perror("sigprocmask");
1002
exitstatus = EXIT_FAILURE;
1220
1003
goto fallback;
1221
1004
}
1222
1005
1232
1015
bool bret = print_out_password(proc->buffer,
1233
1016
proc->buffer_length);
1234
1017
if(not bret){
1235
error(0, errno, "print_out_password");
1236
exitstatus = EX_IOERR;
1018
perror("print_out_password");
1019
exitstatus = EXIT_FAILURE;
1237
1020
}
1238
1021
goto fallback;
1239
1022
}
1240
1023
1241
1024
/* This process has not completed. Does it have any output? */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic push
1245
#pragma GCC diagnostic ignored "-Wsign-conversion"
1246
#endif
1247
#endif
1248
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1249
warning from
1250
-Wconversion
1251
in GNU libc
1252
before
1253
2.16 */
1254
#if defined (__GNUC__) and defined (__GLIBC__)
1255
#if not __GLIBC_PREREQ(2, 16)
1256
#pragma GCC diagnostic pop
1257
#endif
1258
#endif
1025
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1259
1026
/* This process had nothing to say at this time */
1260
1027
proc = proc->next;
1261
1028
continue;
1262
1029
}
1263
1030
/* Before reading, make the process' data buffer large enough */
1264
1031
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1265
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1266
+ (size_t) BUFFER_SIZE);
1267
if(new_buffer == NULL){
1268
error(0, errno, "malloc");
1269
exitstatus = EX_OSERR;
1032
proc->buffer = realloc(proc->buffer, proc->buffer_size
1033
+ (size_t) BUFFER_SIZE);
1034
if(proc->buffer == NULL){
1035
perror("malloc");
1036
exitstatus = EXIT_FAILURE;
1270
1037
goto fallback;
1271
1038
}
1272
proc->buffer = new_buffer;
1273
1039
proc->buffer_size += BUFFER_SIZE;
1274
1040
}
1275
1041
/* Read from the process */
1276
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1277
proc->buffer
1278
+ proc->buffer_length,
1279
BUFFER_SIZE));
1042
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1043
BUFFER_SIZE);
1280
1044
if(sret < 0){
1281
1045
/* Read error from this process; ignore the error */
1282
1046
proc = proc->next;
1290
1054
}
1291
1055
}
1292
1056
}
1293
1294
1057
1058
1295
1059
fallback:
1296
1060
1297
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1298
and exitstatus != EX_OK)){
1061
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1299
1062
/* Fallback if all plugins failed, none are found or an error
1300
1063
occured */
1301
1064
bool bret;
1309
1072
}
1310
1073
bret = print_out_password(passwordbuffer, len);
1311
1074
if(not bret){
1312
error(0, errno, "print_out_password");
1313
exitstatus = EX_IOERR;
1075
perror("print_out_password");
1076
exitstatus = EXIT_FAILURE;
1314
1077
}
1315
1078
}
1316
1079
1317
1080
/* Restore old signal handler */
1318
1081
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1319
1082
if(ret == -1){
1320
error(0, errno, "sigaction");
1321
exitstatus = EX_OSERR;
1083
perror("sigaction");
1084
exitstatus = EXIT_FAILURE;
1322
1085
}
1323
1086
1324
1087
if(custom_argv != NULL){
1339
1102
ret = kill(p->pid, SIGTERM);
1340
1103
if(ret == -1 and errno != ESRCH){
1341
1104
/* Set-uid proccesses might not get closed */
1342
error(0, errno, "kill");
1105
perror("kill");
1343
1106
}
1344
1107
}
1345
1108
}
1346
1109
1347
1110
/* Wait for any remaining child processes to terminate */
1348
do {
1111
do{
1349
1112
ret = wait(NULL);
1350
1113
} while(ret >= 0);
1351
1114
if(errno != ECHILD){
1352
error(0, errno, "wait");
1115
perror("wait");
1353
1116
}
1354
1117
1355
1118
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0