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- Committer: Teddy Hogeborn
- Date: 2014-06-07 20:29:36 UTC
- Revision ID: teddy@recompile.se-20140607202936-crh5fxrdd804oora
Fix typo in code comment.
* debian/mandos.postinst: Fix typo in comment.
* debian/mandos.postinst: Fix typo in comment.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- files removed:
- debian/mandos-client.config
- files renamed:
- mandos-list => mandos-ctl
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008 Teddy Hogeborn
6
* Copyright © 2008 Björn Påhlsson
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 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@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
26
O_CLOEXEC */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* DIR, fdopendir(), fstat(), 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() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
44
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
45
46
readdir(), closedir(), dirfd() */
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() */
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
*/
53
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
55
FD_CLOEXEC, openat() */
56
#include <string.h> /* strsep, strlen(), strsignal(),
57
strcmp(), strncmp() */
56
58
#include <errno.h> /* errno */
57
59
#include <argp.h> /* struct argp_option, struct
58
60
argp_state, struct argp,
62
64
#include <signal.h> /* struct sigaction, sigemptyset(),
63
65
sigaddset(), sigaction(),
64
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
66
69
#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
#include <fnmatch.h> /* fnmatch() */
67
76
68
77
#define BUFFER_SIZE 256
69
78
71
80
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
72
81
73
82
const char *argp_program_version = "plugin-runner " VERSION;
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
75
84
76
85
typedef struct plugin{
77
86
char *name; /* can be NULL or any plugin name */
80
89
char **environ;
81
90
int envc;
82
91
bool disabled;
83
92
84
93
/* Variables used for running processes*/
85
94
pid_t pid;
86
95
int fd;
88
97
size_t buffer_size;
89
98
size_t buffer_length;
90
99
bool eof;
91
volatile bool completed;
92
volatile int status;
100
volatile sig_atomic_t completed;
101
int status;
93
102
struct plugin *next;
94
103
} plugin;
95
104
97
106
98
107
/* Gets an existing plugin based on name,
99
108
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
100
110
static plugin *getplugin(char *name){
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))){
111
/* Check for existing plugin with that name */
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
if((p->name == name)
114
or (p->name and name and (strcmp(p->name, name) == 0))){
105
115
return p;
106
116
}
107
117
}
108
118
/* Create a new plugin */
109
plugin *new_plugin = malloc(sizeof(plugin));
110
if (new_plugin == NULL){
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
123
if(new_plugin == NULL){
111
124
return NULL;
112
125
}
113
126
char *copy_name = NULL;
114
127
if(name != NULL){
115
copy_name = strdup(name);
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
116
131
if(copy_name == NULL){
132
int e = errno;
133
free(new_plugin);
134
errno = e;
117
135
return NULL;
118
136
}
119
137
}
120
138
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
139
*new_plugin = (plugin){ .name = copy_name,
140
.argc = 1,
141
.disabled = false,
142
.next = plugin_list };
125
143
126
new_plugin->argv = malloc(sizeof(char *) * 2);
127
if (new_plugin->argv == NULL){
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
147
if(new_plugin->argv == NULL){
148
int e = errno;
128
149
free(copy_name);
129
150
free(new_plugin);
151
errno = e;
130
152
return NULL;
131
153
}
132
154
new_plugin->argv[0] = copy_name;
133
155
new_plugin->argv[1] = NULL;
134
156
135
new_plugin->environ = malloc(sizeof(char *));
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
136
160
if(new_plugin->environ == NULL){
161
int e = errno;
137
162
free(copy_name);
138
163
free(new_plugin->argv);
139
164
free(new_plugin);
165
errno = e;
140
166
return NULL;
141
167
}
142
168
new_plugin->environ[0] = NULL;
147
173
}
148
174
149
175
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
150
177
static bool add_to_char_array(const char *new, char ***array,
151
178
int *len){
152
179
/* Resize the pointed-to array to hold one more pointer */
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
180
char **new_array = NULL;
181
do {
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
184
} while(new_array == NULL and errno == EINTR);
155
185
/* Malloc check */
156
if(*array == NULL){
186
if(new_array == NULL){
157
187
return false;
158
188
}
189
*array = new_array;
159
190
/* Make a copy of the new string */
160
char *copy = strdup(new);
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
161
195
if(copy == NULL){
162
196
return false;
163
197
}
170
204
}
171
205
172
206
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
173
208
static bool add_argument(plugin *p, const char *arg){
174
209
if(p == NULL){
175
210
return false;
178
213
}
179
214
180
215
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
181
217
static bool add_environment(plugin *p, const char *def, bool replace){
182
218
if(p == NULL){
183
219
return false;
185
221
/* namelen = length of name of environment variable */
186
222
size_t namelen = (size_t)(strchrnul(def, '=') - def);
187
223
/* Search for this environment variable */
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
190
226
/* It already exists */
191
227
if(replace){
192
char *new = realloc(*e, strlen(def) + 1);
193
if(new == NULL){
228
char *new_envdef;
229
do {
230
new_envdef = realloc(*envdef, strlen(def) + 1);
231
} while(new_envdef == NULL and errno == EINTR);
232
if(new_envdef == NULL){
194
233
return false;
195
234
}
196
*e = new;
197
strcpy(*e, def);
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
198
237
}
199
238
return true;
200
239
}
205
244
/*
206
245
* Based on the example in the GNU LibC manual chapter 13.13 "File
207
246
* Descriptor Flags".
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
247
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
209
248
*/
249
__attribute__((warn_unused_result))
210
250
static int set_cloexec_flag(int fd){
211
int ret = fcntl(fd, F_GETFD, 0);
251
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
212
252
/* If reading the flags failed, return error indication now. */
213
253
if(ret < 0){
214
254
return ret;
215
255
}
216
256
/* Store modified flag word in the descriptor. */
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
257
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
258
ret | FD_CLOEXEC));
218
259
}
219
260
220
261
221
262
/* Mark processes as completed when they exit, and save their exit
222
263
status. */
223
264
static void handle_sigchld(__attribute__((unused)) int sig){
265
int old_errno = errno;
224
266
while(true){
225
267
plugin *proc = plugin_list;
226
268
int status;
230
272
break;
231
273
}
232
274
if(pid == -1){
233
if (errno != ECHILD){
234
perror("waitpid");
275
if(errno == ECHILD){
276
/* No child processes */
277
break;
235
278
}
236
/* No child processes */
237
break;
279
error(0, errno, "waitpid");
238
280
}
239
281
240
282
/* A child exited, find it in process_list */
246
288
continue;
247
289
}
248
290
proc->status = status;
249
proc->completed = true;
291
proc->completed = 1;
250
292
}
293
errno = old_errno;
251
294
}
252
295
253
296
/* Prints out a password to stdout */
297
__attribute__((nonnull, warn_unused_result))
254
298
static bool print_out_password(const char *buffer, size_t length){
255
299
ssize_t ret;
256
300
for(size_t written = 0; written < length; written += (size_t)ret){
264
308
}
265
309
266
310
/* Removes and free a plugin from the plugin list */
311
__attribute__((nonnull))
267
312
static void free_plugin(plugin *plugin_node){
268
313
269
314
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
275
320
}
276
321
free(plugin_node->environ);
277
322
free(plugin_node->buffer);
278
323
279
324
/* Removes the plugin from the singly-linked list */
280
325
if(plugin_node == plugin_list){
281
326
/* First one - simple */
303
348
char *plugindir = NULL;
304
349
char *argfile = NULL;
305
350
FILE *conffp;
306
size_t d_name_len;
307
351
DIR *dir = NULL;
308
352
struct dirent *dirst;
309
353
struct stat st;
310
354
fd_set rfds_all;
311
355
int ret, maxfd = 0;
356
ssize_t sret;
312
357
uid_t uid = 65534;
313
358
gid_t gid = 65534;
314
359
bool debug = false;
318
363
.sa_flags = SA_NOCLDSTOP };
319
364
char **custom_argv = NULL;
320
365
int custom_argc = 0;
366
int dir_fd;
321
367
322
368
/* Establish a signal handler */
323
369
sigemptyset(&sigchld_action.sa_mask);
324
370
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
325
371
if(ret == -1){
326
perror("sigaddset");
327
exitstatus = EXIT_FAILURE;
372
error(0, errno, "sigaddset");
373
exitstatus = EX_OSERR;
328
374
goto fallback;
329
375
}
330
376
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
331
377
if(ret == -1){
332
perror("sigaction");
333
exitstatus = EXIT_FAILURE;
378
error(0, errno, "sigaction");
379
exitstatus = EX_OSERR;
334
380
goto fallback;
335
381
}
336
382
368
414
.doc = "Group ID the plugins will run as", .group = 3 },
369
415
{ .name = "debug", .key = 132,
370
416
.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 },
371
426
{ .name = NULL }
372
427
};
373
428
374
error_t parse_opt (int key, char *arg, __attribute__((unused))
375
struct argp_state *state) {
376
switch (key) {
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
435
case 'g': /* --global-options */
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;
436
{
437
char *plugin_option;
438
while((plugin_option = strsep(&arg, ",")) != NULL){
439
if(not add_argument(getplugin(NULL), plugin_option)){
440
break;
387
441
}
388
442
}
443
errno = 0;
389
444
}
390
445
break;
391
446
case 'G': /* --global-env */
392
if(arg == NULL){
393
break;
394
}
395
if(not add_environment(getplugin(NULL), arg, true)){
396
perror("add_environment");
447
if(add_environment(getplugin(NULL), arg, true)){
448
errno = 0;
397
449
}
398
450
break;
399
451
case 'o': /* --options-for */
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;
417
}
418
}
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;
419
473
}
420
474
break;
421
475
case 'E': /* --env-for */
422
if(arg == NULL){
423
break;
424
}
425
476
{
426
477
char *envdef = strchr(arg, ':');
427
478
if(envdef == NULL){
479
argp_error(state, "No colon in \"%s\"", arg);
480
errno = EINVAL;
428
481
break;
429
482
}
430
483
*envdef = '\0';
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
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;
433
492
}
434
493
}
435
494
break;
436
495
case 'd': /* --disable */
437
if (arg != NULL){
496
{
438
497
plugin *p = getplugin(arg);
439
if(p == NULL){
440
return ARGP_ERR_UNKNOWN;
498
if(p != NULL){
499
p->disabled = true;
500
errno = 0;
441
501
}
442
p->disabled = true;
443
502
}
444
503
break;
445
504
case 'e': /* --enable */
446
if (arg != NULL){
505
{
447
506
plugin *p = getplugin(arg);
448
if(p == NULL){
449
return ARGP_ERR_UNKNOWN;
507
if(p != NULL){
508
p->disabled = false;
509
errno = 0;
450
510
}
451
p->disabled = false;
452
511
}
453
512
break;
454
513
case 128: /* --plugin-dir */
455
514
free(plugindir);
456
515
plugindir = strdup(arg);
457
if(plugindir == NULL){
458
perror("strdup");
459
}
516
if(plugindir != NULL){
517
errno = 0;
518
}
460
519
break;
461
520
case 129: /* --config-file */
462
521
/* This is already done by parse_opt_config_file() */
463
522
break;
464
523
case 130: /* --userid */
465
uid = (uid_t)strtol(arg, NULL, 10);
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;
530
}
531
uid = (uid_t)tmp_id;
532
errno = 0;
466
533
break;
467
534
case 131: /* --groupid */
468
gid = (gid_t)strtol(arg, NULL, 10);
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;
541
}
542
gid = (gid_t)tmp_id;
543
errno = 0;
469
544
break;
470
545
case 132: /* --debug */
471
546
debug = true;
472
547
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
/*
563
* When adding more options before this line, remember to also add a
564
* "case" to the "parse_opt_config_file" function below.
565
*/
473
566
case ARGP_KEY_ARG:
474
567
/* Cryptsetup always passes an argument, which is an empty
475
568
string if "none" was specified in /etc/crypttab. So if
476
569
argument was empty, we ignore it silently. */
477
if(arg[0] != '\0'){
478
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
570
if(arg[0] == '\0'){
571
break;
479
572
}
480
break;
481
case ARGP_KEY_END:
482
break;
483
573
default:
484
574
return ARGP_ERR_UNKNOWN;
485
575
}
486
return 0;
576
return errno; /* Set to 0 at start */
487
577
}
488
578
489
579
/* This option parser is the same as parse_opt() above, except it
490
580
ignores everything but the --config-file option. */
491
error_t parse_opt_config_file (int key, char *arg,
492
__attribute__((unused))
493
struct argp_state *state) {
494
switch (key) {
581
error_t parse_opt_config_file(int key, char *arg,
582
__attribute__((unused))
583
struct argp_state *state){
584
errno = 0;
585
switch(key){
495
586
case 'g': /* --global-options */
496
587
case 'G': /* --global-env */
497
588
case 'o': /* --options-for */
503
594
case 129: /* --config-file */
504
595
free(argfile);
505
596
argfile = strdup(arg);
506
if(argfile == NULL){
507
perror("strdup");
597
if(argfile != NULL){
598
errno = 0;
508
599
}
509
break;
600
break;
510
601
case 130: /* --userid */
511
602
case 131: /* --groupid */
512
603
case 132: /* --debug */
604
case '?': /* --help */
605
case -3: /* --usage */
606
case 'V': /* --version */
513
607
case ARGP_KEY_ARG:
514
case ARGP_KEY_END:
515
608
break;
516
609
default:
517
610
return ARGP_ERR_UNKNOWN;
518
611
}
519
return 0;
612
return errno;
520
613
}
521
614
522
615
struct argp argp = { .options = options,
524
617
.args_doc = "",
525
618
.doc = "Mandos plugin runner -- Run plugins" };
526
619
527
/* Parse using the parse_opt_config_file in order to get the custom
620
/* Parse using parse_opt_config_file() in order to get the custom
528
621
config file location, if any. */
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;
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;
533
636
goto fallback;
534
637
}
535
638
537
640
argp.parser = parse_opt;
538
641
539
642
/* Open the configfile if available */
540
if (argfile == NULL){
643
if(argfile == NULL){
541
644
conffp = fopen(AFILE, "r");
542
645
} else {
543
646
conffp = fopen(argfile, "r");
544
}
647
}
545
648
if(conffp != NULL){
546
649
char *org_line = NULL;
547
650
char *p, *arg, *new_arg, *line;
548
651
size_t size = 0;
549
ssize_t sret;
550
652
const char whitespace_delims[] = " \r\t\f\v\n";
551
653
const char comment_delim[] = "#";
552
654
553
655
custom_argc = 1;
554
656
custom_argv = malloc(sizeof(char*) * 2);
555
657
if(custom_argv == NULL){
556
perror("malloc");
557
exitstatus = EXIT_FAILURE;
658
error(0, errno, "malloc");
659
exitstatus = EX_OSERR;
558
660
goto fallback;
559
661
}
560
662
custom_argv[0] = argv[0];
561
663
custom_argv[1] = NULL;
562
664
563
665
/* for each line in the config file, strip whitespace and ignore
564
666
commented text */
565
667
while(true){
567
669
if(sret == -1){
568
670
break;
569
671
}
570
672
571
673
line = org_line;
572
674
arg = strsep(&line, comment_delim);
573
675
while((p = strsep(&arg, whitespace_delims)) != NULL){
576
678
}
577
679
new_arg = strdup(p);
578
680
if(new_arg == NULL){
579
perror("strdup");
580
exitstatus = EXIT_FAILURE;
681
error(0, errno, "strdup");
682
exitstatus = EX_OSERR;
581
683
free(org_line);
582
684
goto fallback;
583
685
}
584
686
585
687
custom_argc += 1;
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;
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
}
593
701
}
594
702
custom_argv[custom_argc-1] = new_arg;
595
custom_argv[custom_argc] = NULL;
703
custom_argv[custom_argc] = NULL;
596
704
}
597
705
}
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
}
598
714
free(org_line);
599
715
} else {
600
716
/* Check for harmful errors and go to fallback. Other errors might
601
717
not affect opening plugins */
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
603
perror("fopen");
604
exitstatus = EXIT_FAILURE;
718
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
719
error(0, errno, "fopen");
720
exitstatus = EX_OSERR;
605
721
goto fallback;
606
722
}
607
723
}
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
724
/* If there were any arguments from the configuration file, pass
725
them to parser as command line arguments */
610
726
if(custom_argv != NULL){
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;
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;
616
741
goto fallback;
617
742
}
618
743
}
619
744
620
745
/* Parse actual command line arguments, to let them override the
621
746
config file */
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;
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;
626
761
goto fallback;
627
762
}
628
763
633
768
for(char **a = p->argv; *a != NULL; a++){
634
769
fprintf(stderr, "\tArg: %s\n", *a);
635
770
}
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
771
fprintf(stderr, "...and %d environment variables\n", p->envc);
637
772
for(char **a = p->environ; *a != NULL; a++){
638
773
fprintf(stderr, "\t%s\n", *a);
639
774
}
640
775
}
641
776
}
642
777
643
/* Strip permissions down to nobody */
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
}
644
807
ret = setuid(uid);
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 */
808
if(ret == -1){
809
error(0, errno, "setuid");
810
}
811
812
/* Open plugin directory with close_on_exec flag */
666
813
{
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
}
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;
675
844
}
676
845
}
677
846
679
848
680
849
/* Read and execute any executable in the plugin directory*/
681
850
while(true){
682
dirst = readdir(dir);
851
do {
852
dirst = readdir(dir);
853
} while(dirst == NULL and errno == EINTR);
683
854
684
855
/* All directory entries have been processed */
685
856
if(dirst == NULL){
686
if (errno == EBADF){
687
perror("readdir");
688
exitstatus = EXIT_FAILURE;
857
if(errno == EBADF){
858
error(0, errno, "readdir");
859
exitstatus = EX_IOERR;
689
860
goto fallback;
690
861
}
691
862
break;
692
863
}
693
864
694
d_name_len = strlen(dirst->d_name);
695
696
865
/* Ignore dotfiles, backup files and other junk */
697
866
{
698
867
bool bad_name = false;
699
700
const char const *bad_prefixes[] = { ".", "#", NULL };
701
702
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
703
".dpkg-old",
704
".dpkg-bak",
705
".dpkg-divert", NULL };
706
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
707
size_t pre_len = strlen(*pre);
708
if((d_name_len >= pre_len)
709
and strncmp((dirst->d_name), *pre, pre_len) == 0){
710
if(debug){
711
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
712
" with bad prefix %s\n", dirst->d_name, *pre);
713
}
714
bad_name = true;
715
break;
716
}
717
}
718
if(bad_name){
719
continue;
720
}
721
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
722
size_t suf_len = strlen(*suf);
723
if((d_name_len >= suf_len)
724
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
725
== 0)){
726
if(debug){
727
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
728
" with bad suffix %s\n", dirst->d_name, *suf);
729
}
730
bad_name = true;
731
break;
732
}
733
}
734
735
if(bad_name){
736
continue;
737
}
738
}
739
740
char *filename;
741
if(plugindir == NULL){
742
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
743
} else {
744
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
745
}
868
const char * const patterns[] = { ".*", "#*#", "*~",
869
"*.dpkg-new", "*.dpkg-old",
870
"*.dpkg-bak", "*.dpkg-divert",
871
NULL };
872
#ifdef __GNUC__
873
#pragma GCC diagnostic push
874
#pragma GCC diagnostic ignored "-Wcast-qual"
875
#endif
876
for(const char **pat = (const char **)patterns;
877
*pat != NULL; pat++){
878
#ifdef __GNUC__
879
#pragma GCC diagnostic pop
880
#endif
881
if(fnmatch(*pat, dirst->d_name,
882
FNM_FILE_NAME | FNM_PERIOD) != FNM_NOMATCH){
883
if(debug){
884
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
885
" matching pattern %s\n", dirst->d_name, *pat);
886
}
887
bad_name = true;
888
break;
889
}
890
}
891
if(bad_name){
892
continue;
893
}
894
}
895
896
int plugin_fd = openat(dir_fd, dirst->d_name, O_RDONLY |
897
#ifdef O_CLOEXEC
898
O_CLOEXEC
899
#else /* not O_CLOEXEC */
900
0
901
#endif /* not O_CLOEXEC */
902
);
903
if(plugin_fd == -1){
904
error(0, errno, "Could not open plugin");
905
continue;
906
}
907
#ifndef O_CLOEXEC
908
/* Set the FD_CLOEXEC flag on the plugin FD */
909
ret = set_cloexec_flag(plugin_fd);
746
910
if(ret < 0){
747
perror("asprintf");
911
error(0, errno, "set_cloexec_flag");
912
TEMP_FAILURE_RETRY(close(plugin_fd));
913
continue;
914
}
915
#endif /* O_CLOEXEC */
916
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
917
if(ret == -1){
918
error(0, errno, "stat");
919
TEMP_FAILURE_RETRY(close(plugin_fd));
748
920
continue;
749
921
}
750
922
751
ret = stat(filename, &st);
752
if (ret == -1){
753
perror("stat");
754
free(filename);
755
continue;
756
}
757
758
923
/* Ignore non-executable files */
759
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
924
if(not S_ISREG(st.st_mode)
925
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, dirst->d_name, X_OK,
926
0)) != 0)){
760
927
if(debug){
761
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
762
" with bad type or mode\n", filename);
928
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
929
" with bad type or mode\n",
930
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
763
931
}
764
free(filename);
932
TEMP_FAILURE_RETRY(close(plugin_fd));
765
933
continue;
766
934
}
767
935
768
936
plugin *p = getplugin(dirst->d_name);
769
937
if(p == NULL){
770
perror("getplugin");
771
free(filename);
938
error(0, errno, "getplugin");
939
TEMP_FAILURE_RETRY(close(plugin_fd));
772
940
continue;
773
941
}
774
942
if(p->disabled){
776
944
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
777
945
dirst->d_name);
778
946
}
779
free(filename);
947
TEMP_FAILURE_RETRY(close(plugin_fd));
780
948
continue;
781
949
}
782
950
{
785
953
if(g != NULL){
786
954
for(char **a = g->argv + 1; *a != NULL; a++){
787
955
if(not add_argument(p, *a)){
788
perror("add_argument");
956
error(0, errno, "add_argument");
789
957
}
790
958
}
791
959
/* Add global environment variables */
792
960
for(char **e = g->environ; *e != NULL; e++){
793
961
if(not add_environment(p, *e, false)){
794
perror("add_environment");
962
error(0, errno, "add_environment");
795
963
}
796
964
}
797
965
}
798
966
}
799
/* If this plugin has any environment variables, we will call
800
using execve and need to duplicate the environment from this
801
process, too. */
967
/* If this plugin has any environment variables, we need to
968
duplicate the environment from this process, too. */
802
969
if(p->environ[0] != NULL){
803
970
for(char **e = environ; *e != NULL; e++){
804
971
if(not add_environment(p, *e, false)){
805
perror("add_environment");
972
error(0, errno, "add_environment");
806
973
}
807
974
}
808
975
}
809
976
810
977
int pipefd[2];
811
ret = pipe(pipefd);
812
if (ret == -1){
813
perror("pipe");
814
exitstatus = EXIT_FAILURE;
978
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
979
if(ret == -1){
980
error(0, errno, "pipe");
981
exitstatus = EX_OSERR;
815
982
goto fallback;
816
983
}
817
984
/* Ask OS to automatic close the pipe on exec */
818
985
ret = set_cloexec_flag(pipefd[0]);
819
986
if(ret < 0){
820
perror("set_cloexec_flag");
821
exitstatus = EXIT_FAILURE;
987
error(0, errno, "set_cloexec_flag");
988
exitstatus = EX_OSERR;
822
989
goto fallback;
823
990
}
824
991
ret = set_cloexec_flag(pipefd[1]);
825
992
if(ret < 0){
826
perror("set_cloexec_flag");
827
exitstatus = EXIT_FAILURE;
993
error(0, errno, "set_cloexec_flag");
994
exitstatus = EX_OSERR;
828
995
goto fallback;
829
996
}
830
997
/* Block SIGCHLD until process is safely in process list */
831
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
998
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
999
&sigchld_action.sa_mask,
1000
NULL));
832
1001
if(ret < 0){
833
perror("sigprocmask");
834
exitstatus = EXIT_FAILURE;
1002
error(0, errno, "sigprocmask");
1003
exitstatus = EX_OSERR;
835
1004
goto fallback;
836
1005
}
837
1006
/* Starting a new process to be watched */
838
pid_t pid = fork();
1007
pid_t pid;
1008
do {
1009
pid = fork();
1010
} while(pid == -1 and errno == EINTR);
839
1011
if(pid == -1){
840
perror("fork");
841
exitstatus = EXIT_FAILURE;
1012
error(0, errno, "fork");
1013
exitstatus = EX_OSERR;
842
1014
goto fallback;
843
1015
}
844
1016
if(pid == 0){
845
1017
/* this is the child process */
846
1018
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
847
1019
if(ret < 0){
848
perror("sigaction");
849
_exit(EXIT_FAILURE);
1020
error(0, errno, "sigaction");
1021
_exit(EX_OSERR);
850
1022
}
851
1023
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
852
1024
if(ret < 0){
853
perror("sigprocmask");
854
_exit(EXIT_FAILURE);
1025
error(0, errno, "sigprocmask");
1026
_exit(EX_OSERR);
855
1027
}
856
1028
857
1029
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
858
1030
if(ret == -1){
859
perror("dup2");
860
_exit(EXIT_FAILURE);
1031
error(0, errno, "dup2");
1032
_exit(EX_OSERR);
861
1033
}
862
1034
863
1035
if(dirfd(dir) < 0){
865
1037
above and must now close it manually here. */
866
1038
closedir(dir);
867
1039
}
868
if(p->environ[0] == NULL){
869
if(execv(filename, p->argv) < 0){
870
perror("execv");
871
_exit(EXIT_FAILURE);
872
}
873
} else {
874
if(execve(filename, p->argv, p->environ) < 0){
875
perror("execve");
876
_exit(EXIT_FAILURE);
877
}
1040
if(fexecve(plugin_fd, p->argv,
1041
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1042
error(0, errno, "fexecve for %s/%s",
1043
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
1044
_exit(EX_OSERR);
878
1045
}
879
1046
/* no return */
880
1047
}
881
1048
/* Parent process */
882
close(pipefd[1]); /* Close unused write end of pipe */
883
free(filename);
1049
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1050
pipe */
1051
TEMP_FAILURE_RETRY(close(plugin_fd));
884
1052
plugin *new_plugin = getplugin(dirst->d_name);
885
if (new_plugin == NULL){
886
perror("getplugin");
887
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1053
if(new_plugin == NULL){
1054
error(0, errno, "getplugin");
1055
ret = (int)(TEMP_FAILURE_RETRY
1056
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1057
NULL)));
888
1058
if(ret < 0){
889
perror("sigprocmask");
1059
error(0, errno, "sigprocmask");
890
1060
}
891
exitstatus = EXIT_FAILURE;
1061
exitstatus = EX_OSERR;
892
1062
goto fallback;
893
1063
}
894
1064
897
1067
898
1068
/* Unblock SIGCHLD so signal handler can be run if this process
899
1069
has already completed */
900
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1070
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1071
&sigchld_action.sa_mask,
1072
NULL));
901
1073
if(ret < 0){
902
perror("sigprocmask");
903
exitstatus = EXIT_FAILURE;
1074
error(0, errno, "sigprocmask");
1075
exitstatus = EX_OSERR;
904
1076
goto fallback;
905
1077
}
906
1078
907
FD_SET(new_plugin->fd, &rfds_all);
1079
#if defined (__GNUC__) and defined (__GLIBC__)
1080
#if not __GLIBC_PREREQ(2, 16)
1081
#pragma GCC diagnostic push
1082
#pragma GCC diagnostic ignored "-Wsign-conversion"
1083
#endif
1084
#endif
1085
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1086
-Wconversion in GNU libc
1087
before 2.16 */
1088
#if defined (__GNUC__) and defined (__GLIBC__)
1089
#if not __GLIBC_PREREQ(2, 16)
1090
#pragma GCC diagnostic pop
1091
#endif
1092
#endif
908
1093
909
if (maxfd < new_plugin->fd){
1094
if(maxfd < new_plugin->fd){
910
1095
maxfd = new_plugin->fd;
911
1096
}
912
1097
}
913
1098
914
closedir(dir);
1099
TEMP_FAILURE_RETRY(closedir(dir));
915
1100
dir = NULL;
1101
free_plugin(getplugin(NULL));
916
1102
917
1103
for(plugin *p = plugin_list; p != NULL; p = p->next){
918
1104
if(p->pid != 0){
929
1115
while(plugin_list){
930
1116
fd_set rfds = rfds_all;
931
1117
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
932
if (select_ret == -1){
933
perror("select");
934
exitstatus = EXIT_FAILURE;
1118
if(select_ret == -1 and errno != EINTR){
1119
error(0, errno, "select");
1120
exitstatus = EX_OSERR;
935
1121
goto fallback;
936
1122
}
937
1123
/* OK, now either a process completed, or something can be read
938
1124
from one of them */
939
1125
for(plugin *proc = plugin_list; proc != NULL;){
940
1126
/* Is this process completely done? */
941
if(proc->eof and proc->completed){
1127
if(proc->completed and proc->eof){
942
1128
/* Only accept the plugin output if it exited cleanly */
943
1129
if(not WIFEXITED(proc->status)
944
1130
or WEXITSTATUS(proc->status) != 0){
945
1131
/* Bad exit by plugin */
946
1132
947
1133
if(debug){
948
1134
if(WIFEXITED(proc->status)){
949
fprintf(stderr, "Plugin %u exited with status %d\n",
950
(unsigned int) (proc->pid),
1135
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1136
" status %d\n", proc->name,
1137
(intmax_t) (proc->pid),
951
1138
WEXITSTATUS(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));
1139
} else if(WIFSIGNALED(proc->status)){
1140
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1141
" signal %d: %s\n", proc->name,
1142
(intmax_t) (proc->pid),
1143
WTERMSIG(proc->status),
1144
strsignal(WTERMSIG(proc->status)));
956
1145
} else if(WCOREDUMP(proc->status)){
957
fprintf(stderr, "Plugin %d dumped core\n",
958
(unsigned int) (proc->pid));
1146
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1147
" core\n", proc->name, (intmax_t) (proc->pid));
959
1148
}
960
1149
}
961
1150
962
1151
/* Remove the plugin */
963
FD_CLR(proc->fd, &rfds_all);
964
1152
#if defined (__GNUC__) and defined (__GLIBC__)
1153
#if not __GLIBC_PREREQ(2, 16)
1154
#pragma GCC diagnostic push
1155
#pragma GCC diagnostic ignored "-Wsign-conversion"
1156
#endif
1157
#endif
1158
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1159
-Wconversion in GNU libc
1160
before 2.16 */
1161
#if defined (__GNUC__) and defined (__GLIBC__)
1162
#if not __GLIBC_PREREQ(2, 16)
1163
#pragma GCC diagnostic pop
1164
#endif
1165
#endif
1166
965
1167
/* Block signal while modifying process_list */
966
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1168
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1169
(SIG_BLOCK,
1170
&sigchld_action.sa_mask,
1171
NULL));
967
1172
if(ret < 0){
968
perror("sigprocmask");
969
exitstatus = EXIT_FAILURE;
1173
error(0, errno, "sigprocmask");
1174
exitstatus = EX_OSERR;
970
1175
goto fallback;
971
1176
}
972
1177
975
1180
proc = next_plugin;
976
1181
977
1182
/* We are done modifying process list, so unblock signal */
978
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
979
NULL);
1183
ret = (int)(TEMP_FAILURE_RETRY
1184
(sigprocmask(SIG_UNBLOCK,
1185
&sigchld_action.sa_mask, NULL)));
980
1186
if(ret < 0){
981
perror("sigprocmask");
982
exitstatus = EXIT_FAILURE;
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
983
1189
goto fallback;
984
1190
}
985
1191
995
1201
bool bret = print_out_password(proc->buffer,
996
1202
proc->buffer_length);
997
1203
if(not bret){
998
perror("print_out_password");
999
exitstatus = EXIT_FAILURE;
1204
error(0, errno, "print_out_password");
1205
exitstatus = EX_IOERR;
1000
1206
}
1001
1207
goto fallback;
1002
1208
}
1003
1209
1004
1210
/* This process has not completed. Does it have any output? */
1005
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1211
#if defined (__GNUC__) and defined (__GLIBC__)
1212
#if not __GLIBC_PREREQ(2, 16)
1213
#pragma GCC diagnostic push
1214
#pragma GCC diagnostic ignored "-Wsign-conversion"
1215
#endif
1216
#endif
1217
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1218
warning from
1219
-Wconversion
1220
in GNU libc
1221
before
1222
2.16 */
1223
#if defined (__GNUC__) and defined (__GLIBC__)
1224
#if not __GLIBC_PREREQ(2, 16)
1225
#pragma GCC diagnostic pop
1226
#endif
1227
#endif
1006
1228
/* This process had nothing to say at this time */
1007
1229
proc = proc->next;
1008
1230
continue;
1009
1231
}
1010
1232
/* Before reading, make the process' data buffer large enough */
1011
1233
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
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;
1234
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1235
+ (size_t) BUFFER_SIZE);
1236
if(new_buffer == NULL){
1237
error(0, errno, "malloc");
1238
exitstatus = EX_OSERR;
1017
1239
goto fallback;
1018
1240
}
1241
proc->buffer = new_buffer;
1019
1242
proc->buffer_size += BUFFER_SIZE;
1020
1243
}
1021
1244
/* Read from the process */
1022
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1023
BUFFER_SIZE);
1024
if(ret < 0){
1245
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1246
proc->buffer
1247
+ proc->buffer_length,
1248
BUFFER_SIZE));
1249
if(sret < 0){
1025
1250
/* Read error from this process; ignore the error */
1026
1251
proc = proc->next;
1027
1252
continue;
1028
1253
}
1029
if(ret == 0){
1254
if(sret == 0){
1030
1255
/* got EOF */
1031
1256
proc->eof = true;
1032
1257
} else {
1033
proc->buffer_length += (size_t) ret;
1258
proc->buffer_length += (size_t) sret;
1034
1259
}
1035
1260
}
1036
1261
}
1037
1038
1262
1263
1039
1264
fallback:
1040
1265
1041
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1266
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1267
and exitstatus != EX_OK)){
1042
1268
/* Fallback if all plugins failed, none are found or an error
1043
1269
occured */
1044
1270
bool bret;
1052
1278
}
1053
1279
bret = print_out_password(passwordbuffer, len);
1054
1280
if(not bret){
1055
perror("print_out_password");
1056
exitstatus = EXIT_FAILURE;
1281
error(0, errno, "print_out_password");
1282
exitstatus = EX_IOERR;
1057
1283
}
1058
1284
}
1059
1285
1060
1286
/* Restore old signal handler */
1061
1287
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1062
1288
if(ret == -1){
1063
perror("sigaction");
1064
exitstatus = EXIT_FAILURE;
1289
error(0, errno, "sigaction");
1290
exitstatus = EX_OSERR;
1065
1291
}
1066
1292
1067
1293
if(custom_argv != NULL){
1082
1308
ret = kill(p->pid, SIGTERM);
1083
1309
if(ret == -1 and errno != ESRCH){
1084
1310
/* Set-uid proccesses might not get closed */
1085
perror("kill");
1311
error(0, errno, "kill");
1086
1312
}
1087
1313
}
1088
1314
}
1089
1315
1090
1316
/* Wait for any remaining child processes to terminate */
1091
do{
1317
do {
1092
1318
ret = wait(NULL);
1093
1319
} while(ret >= 0);
1094
1320
if(errno != ECHILD){
1095
perror("wait");
1321
error(0, errno, "wait");
1096
1322
}
1097
1323
1098
1324
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0