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- Committer: Teddy Hogeborn
- Date: 2009-01-13 04:45:33 UTC
- mto: (24.1.123 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 245.
- Revision ID: teddy@fukt.bsnet.se-20090113044533-de691yv0fa5w6quw
* plugins.d/mandos-client.c: Only comment changes.
- files removed:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- files renamed:
- mandos-ctl => mandos-list
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 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() */
75
#include <fnmatch.h> /* fnmatch() */
76
67
77
68
#define BUFFER_SIZE 256
78
69
80
71
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
72
82
73
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
84
75
85
76
typedef struct plugin{
86
77
char *name; /* can be NULL or any plugin name */
89
80
char **environ;
90
81
int envc;
91
82
bool disabled;
92
83
93
84
/* Variables used for running processes*/
94
85
pid_t pid;
95
86
int fd;
97
88
size_t buffer_size;
98
89
size_t buffer_length;
99
90
bool eof;
100
volatile sig_atomic_t completed;
101
int status;
91
volatile bool completed;
92
volatile int status;
102
93
struct plugin *next;
103
94
} plugin;
104
95
106
97
107
98
/* Gets an existing plugin based on name,
108
99
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
100
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
101
/* Check for exiting plugin with that name */
112
102
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
103
if((p->name == name)
114
104
or (p->name and name and (strcmp(p->name, name) == 0))){
116
106
}
117
107
}
118
108
/* Create a new plugin */
119
plugin *new_plugin = NULL;
120
do {
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
109
plugin *new_plugin = malloc(sizeof(plugin));
123
110
if(new_plugin == NULL){
124
111
return NULL;
125
112
}
126
113
char *copy_name = NULL;
127
114
if(name != NULL){
128
do {
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
115
copy_name = strdup(name);
131
116
if(copy_name == NULL){
132
int e = errno;
133
free(new_plugin);
134
errno = e;
135
117
return NULL;
136
118
}
137
119
}
138
120
139
*new_plugin = (plugin){ .name = copy_name,
140
.argc = 1,
141
.disabled = false,
142
.next = plugin_list };
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
143
125
144
do {
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
126
new_plugin->argv = malloc(sizeof(char *) * 2);
147
127
if(new_plugin->argv == NULL){
148
int e = errno;
149
128
free(copy_name);
150
129
free(new_plugin);
151
errno = e;
152
130
return NULL;
153
131
}
154
132
new_plugin->argv[0] = copy_name;
155
133
new_plugin->argv[1] = NULL;
156
134
157
do {
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
135
new_plugin->environ = malloc(sizeof(char *));
160
136
if(new_plugin->environ == NULL){
161
int e = errno;
162
137
free(copy_name);
163
138
free(new_plugin->argv);
164
139
free(new_plugin);
165
errno = e;
166
140
return NULL;
167
141
}
168
142
new_plugin->environ[0] = NULL;
173
147
}
174
148
175
149
/* Helper function for add_argument and add_environment */
176
__attribute__((nonnull, warn_unused_result))
177
150
static bool add_to_char_array(const char *new, char ***array,
178
151
int *len){
179
152
/* Resize the pointed-to array to hold one more pointer */
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);
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
185
155
/* Malloc check */
186
if(new_array == NULL){
156
if(*array == NULL){
187
157
return false;
188
158
}
189
*array = new_array;
190
159
/* Make a copy of the new string */
191
char *copy;
192
do {
193
copy = strdup(new);
194
} while(copy == NULL and errno == EINTR);
160
char *copy = strdup(new);
195
161
if(copy == NULL){
196
162
return false;
197
163
}
204
170
}
205
171
206
172
/* Add to a plugin's argument vector */
207
__attribute__((nonnull(2), warn_unused_result))
208
173
static bool add_argument(plugin *p, const char *arg){
209
174
if(p == NULL){
210
175
return false;
213
178
}
214
179
215
180
/* Add to a plugin's environment */
216
__attribute__((nonnull(2), warn_unused_result))
217
181
static bool add_environment(plugin *p, const char *def, bool replace){
218
182
if(p == NULL){
219
183
return false;
221
185
/* namelen = length of name of environment variable */
222
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
223
187
/* Search for this environment variable */
224
for(char **envdef = p->environ; *envdef != NULL; envdef++){
225
if(strncmp(*envdef, def, namelen + 1) == 0){
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
226
190
/* It already exists */
227
191
if(replace){
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){
192
char *new = realloc(*e, strlen(def) + 1);
193
if(new == NULL){
233
194
return false;
234
195
}
235
*envdef = new_envdef;
236
strcpy(*envdef, def);
196
*e = new;
197
strcpy(*e, def);
237
198
}
238
199
return true;
239
200
}
244
205
/*
245
206
* Based on the example in the GNU LibC manual chapter 13.13 "File
246
207
* Descriptor Flags".
247
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
248
209
*/
249
__attribute__((warn_unused_result))
250
210
static int set_cloexec_flag(int fd){
251
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
int ret = fcntl(fd, F_GETFD, 0);
252
212
/* If reading the flags failed, return error indication now. */
253
213
if(ret < 0){
254
214
return ret;
255
215
}
256
216
/* Store modified flag word in the descriptor. */
257
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
258
ret | FD_CLOEXEC));
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
259
218
}
260
219
261
220
262
221
/* Mark processes as completed when they exit, and save their exit
263
222
status. */
264
223
static void handle_sigchld(__attribute__((unused)) int sig){
265
int old_errno = errno;
266
224
while(true){
267
225
plugin *proc = plugin_list;
268
226
int status;
272
230
break;
273
231
}
274
232
if(pid == -1){
275
if(errno == ECHILD){
276
/* No child processes */
277
break;
233
if(errno != ECHILD){
234
perror("waitpid");
278
235
}
279
error(0, errno, "waitpid");
236
/* No child processes */
237
break;
280
238
}
281
239
282
240
/* A child exited, find it in process_list */
288
246
continue;
289
247
}
290
248
proc->status = status;
291
proc->completed = 1;
249
proc->completed = true;
292
250
}
293
errno = old_errno;
294
251
}
295
252
296
253
/* Prints out a password to stdout */
297
__attribute__((nonnull, warn_unused_result))
298
254
static bool print_out_password(const char *buffer, size_t length){
299
255
ssize_t ret;
300
256
for(size_t written = 0; written < length; written += (size_t)ret){
308
264
}
309
265
310
266
/* Removes and free a plugin from the plugin list */
311
__attribute__((nonnull))
312
267
static void free_plugin(plugin *plugin_node){
313
268
314
269
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
320
275
}
321
276
free(plugin_node->environ);
322
277
free(plugin_node->buffer);
323
278
324
279
/* Removes the plugin from the singly-linked list */
325
280
if(plugin_node == plugin_list){
326
281
/* First one - simple */
348
303
char *plugindir = NULL;
349
304
char *argfile = NULL;
350
305
FILE *conffp;
306
size_t d_name_len;
351
307
DIR *dir = NULL;
352
308
struct dirent *dirst;
353
309
struct stat st;
363
319
.sa_flags = SA_NOCLDSTOP };
364
320
char **custom_argv = NULL;
365
321
int custom_argc = 0;
366
int dir_fd;
367
322
368
323
/* Establish a signal handler */
369
324
sigemptyset(&sigchld_action.sa_mask);
370
325
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
371
326
if(ret == -1){
372
error(0, errno, "sigaddset");
373
exitstatus = EX_OSERR;
327
perror("sigaddset");
328
exitstatus = EXIT_FAILURE;
374
329
goto fallback;
375
330
}
376
331
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
377
332
if(ret == -1){
378
error(0, errno, "sigaction");
379
exitstatus = EX_OSERR;
333
perror("sigaction");
334
exitstatus = EXIT_FAILURE;
380
335
goto fallback;
381
336
}
382
337
414
369
.doc = "Group ID the plugins will run as", .group = 3 },
415
370
{ .name = "debug", .key = 132,
416
371
.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
372
{ .name = NULL }
427
373
};
428
374
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;
375
error_t parse_opt(int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
377
switch(key) {
435
378
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;
379
if(arg != NULL){
380
char *p;
381
while((p = strsep(&arg, ",")) != NULL){
382
if(p[0] == '\0'){
383
continue;
384
}
385
if(not add_argument(getplugin(NULL), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
441
388
}
442
389
}
443
errno = 0;
444
390
}
445
391
break;
446
392
case 'G': /* --global-env */
447
if(add_environment(getplugin(NULL), arg, true)){
448
errno = 0;
393
if(arg == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
449
398
}
450
399
break;
451
400
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;
401
if(arg != NULL){
402
char *p_name = strsep(&arg, ":");
403
if(p_name[0] == '\0' or arg == NULL){
404
break;
405
}
406
char *opt = strsep(&arg, ":");
407
if(opt[0] == '\0' or opt == NULL){
408
break;
409
}
410
char *p;
411
while((p = strsep(&opt, ",")) != NULL){
412
if(p[0] == '\0'){
413
continue;
414
}
415
if(not add_argument(getplugin(p_name), p)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
418
}
419
}
473
420
}
474
421
break;
475
422
case 'E': /* --env-for */
423
if(arg == NULL){
424
break;
425
}
476
426
{
477
427
char *envdef = strchr(arg, ':');
478
428
if(envdef == NULL){
479
argp_error(state, "No colon in \"%s\"", arg);
480
errno = EINVAL;
481
429
break;
482
430
}
483
431
*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;
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
492
434
}
493
435
}
494
436
break;
495
437
case 'd': /* --disable */
496
{
438
if(arg != NULL){
497
439
plugin *p = getplugin(arg);
498
if(p != NULL){
499
p->disabled = true;
500
errno = 0;
440
if(p == NULL){
441
return ARGP_ERR_UNKNOWN;
501
442
}
443
p->disabled = true;
502
444
}
503
445
break;
504
446
case 'e': /* --enable */
505
{
447
if(arg != NULL){
506
448
plugin *p = getplugin(arg);
507
if(p != NULL){
508
p->disabled = false;
509
errno = 0;
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
510
451
}
452
p->disabled = false;
511
453
}
512
454
break;
513
455
case 128: /* --plugin-dir */
514
456
free(plugindir);
515
457
plugindir = strdup(arg);
516
if(plugindir != NULL){
517
errno = 0;
518
}
458
if(plugindir == NULL){
459
perror("strdup");
460
}
519
461
break;
520
462
case 129: /* --config-file */
521
463
/* This is already done by parse_opt_config_file() */
522
464
break;
523
465
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;
466
/* In the GNU C library, uid_t is always unsigned int */
467
ret = sscanf(arg, "%u", &uid);
468
if(ret != 1){
469
fprintf(stderr, "Bad user ID number: \"%s\", using %u\n", arg,
470
uid);
530
471
}
531
uid = (uid_t)tmp_id;
532
errno = 0;
533
472
break;
534
473
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;
474
/* In the GNU C library, gid_t is always unsigned int */
475
ret = sscanf(arg, "%u", &gid);
476
if(ret != 1){
477
fprintf(stderr, "Bad group ID number: \"%s\", using %u\n",
478
arg, gid);
541
479
}
542
gid = (gid_t)tmp_id;
543
errno = 0;
544
480
break;
545
481
case 132: /* --debug */
546
482
debug = true;
547
483
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
484
/*
563
485
* When adding more options before this line, remember to also add a
564
486
* "case" to the "parse_opt_config_file" function below.
567
489
/* Cryptsetup always passes an argument, which is an empty
568
490
string if "none" was specified in /etc/crypttab. So if
569
491
argument was empty, we ignore it silently. */
570
if(arg[0] == '\0'){
571
break;
492
if(arg[0] != '\0'){
493
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
572
494
}
495
break;
496
case ARGP_KEY_END:
497
break;
573
498
default:
574
499
return ARGP_ERR_UNKNOWN;
575
500
}
576
return errno; /* Set to 0 at start */
501
return 0;
577
502
}
578
503
579
504
/* This option parser is the same as parse_opt() above, except it
580
505
ignores everything but the --config-file option. */
581
506
error_t parse_opt_config_file(int key, char *arg,
582
507
__attribute__((unused))
583
struct argp_state *state){
584
errno = 0;
585
switch(key){
508
struct argp_state *state) {
509
switch(key) {
586
510
case 'g': /* --global-options */
587
511
case 'G': /* --global-env */
588
512
case 'o': /* --options-for */
594
518
case 129: /* --config-file */
595
519
free(argfile);
596
520
argfile = strdup(arg);
597
if(argfile != NULL){
598
errno = 0;
521
if(argfile == NULL){
522
perror("strdup");
599
523
}
600
break;
524
break;
601
525
case 130: /* --userid */
602
526
case 131: /* --groupid */
603
527
case 132: /* --debug */
604
case '?': /* --help */
605
case -3: /* --usage */
606
case 'V': /* --version */
607
528
case ARGP_KEY_ARG:
529
case ARGP_KEY_END:
608
530
break;
609
531
default:
610
532
return ARGP_ERR_UNKNOWN;
611
533
}
612
return errno;
534
return 0;
613
535
}
614
536
615
537
struct argp argp = { .options = options,
619
541
620
542
/* Parse using parse_opt_config_file() in order to get the custom
621
543
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;
544
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
545
if(ret == ARGP_ERR_UNKNOWN){
546
fprintf(stderr, "Unknown error while parsing arguments\n");
547
exitstatus = EXIT_FAILURE;
636
548
goto fallback;
637
549
}
638
550
644
556
conffp = fopen(AFILE, "r");
645
557
} else {
646
558
conffp = fopen(argfile, "r");
647
}
559
}
648
560
if(conffp != NULL){
649
561
char *org_line = NULL;
650
562
char *p, *arg, *new_arg, *line;
651
563
size_t size = 0;
652
564
const char whitespace_delims[] = " \r\t\f\v\n";
653
565
const char comment_delim[] = "#";
654
566
655
567
custom_argc = 1;
656
568
custom_argv = malloc(sizeof(char*) * 2);
657
569
if(custom_argv == NULL){
658
error(0, errno, "malloc");
659
exitstatus = EX_OSERR;
570
perror("malloc");
571
exitstatus = EXIT_FAILURE;
660
572
goto fallback;
661
573
}
662
574
custom_argv[0] = argv[0];
663
575
custom_argv[1] = NULL;
664
576
665
577
/* for each line in the config file, strip whitespace and ignore
666
578
commented text */
667
579
while(true){
669
581
if(sret == -1){
670
582
break;
671
583
}
672
584
673
585
line = org_line;
674
586
arg = strsep(&line, comment_delim);
675
587
while((p = strsep(&arg, whitespace_delims)) != NULL){
678
590
}
679
591
new_arg = strdup(p);
680
592
if(new_arg == NULL){
681
error(0, errno, "strdup");
682
exitstatus = EX_OSERR;
593
perror("strdup");
594
exitstatus = EXIT_FAILURE;
683
595
free(org_line);
684
596
goto fallback;
685
597
}
686
598
687
599
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
}
600
custom_argv = realloc(custom_argv, sizeof(char *)
601
* ((unsigned int) custom_argc + 1));
602
if(custom_argv == NULL){
603
perror("realloc");
604
exitstatus = EXIT_FAILURE;
605
free(org_line);
606
goto fallback;
701
607
}
702
608
custom_argv[custom_argc-1] = new_arg;
703
custom_argv[custom_argc] = NULL;
609
custom_argv[custom_argc] = NULL;
704
610
}
705
611
}
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
612
free(org_line);
715
613
} else {
716
614
/* Check for harmful errors and go to fallback. Other errors might
717
615
not affect opening plugins */
718
616
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
719
error(0, errno, "fopen");
720
exitstatus = EX_OSERR;
617
perror("fopen");
618
exitstatus = EXIT_FAILURE;
721
619
goto fallback;
722
620
}
723
621
}
724
/* If there were any arguments from the configuration file, pass
725
them to parser as command line arguments */
622
/* If there was any arguments from configuration file,
623
pass them to parser as command arguments */
726
624
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;
625
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
626
0, NULL);
627
if(ret == ARGP_ERR_UNKNOWN){
628
fprintf(stderr, "Unknown error while parsing arguments\n");
629
exitstatus = EXIT_FAILURE;
741
630
goto fallback;
742
631
}
743
632
}
744
633
745
634
/* Parse actual command line arguments, to let them override the
746
635
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;
636
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
637
if(ret == ARGP_ERR_UNKNOWN){
638
fprintf(stderr, "Unknown error while parsing arguments\n");
639
exitstatus = EXIT_FAILURE;
761
640
goto fallback;
762
641
}
763
642
768
647
for(char **a = p->argv; *a != NULL; a++){
769
648
fprintf(stderr, "\tArg: %s\n", *a);
770
649
}
771
fprintf(stderr, "...and %d environment variables\n", p->envc);
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
772
651
for(char **a = p->environ; *a != NULL; a++){
773
652
fprintf(stderr, "\t%s\n", *a);
774
653
}
775
654
}
776
655
}
777
656
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
}
657
/* Strip permissions down to nobody */
807
658
ret = setuid(uid);
808
659
if(ret == -1){
809
error(0, errno, "setuid");
810
}
811
812
/* Open plugin directory with close_on_exec flag */
660
perror("setuid");
661
}
662
setgid(gid);
663
if(ret == -1){
664
perror("setgid");
665
}
666
667
if(plugindir == NULL){
668
dir = opendir(PDIR);
669
} else {
670
dir = opendir(plugindir);
671
}
672
673
if(dir == NULL){
674
perror("Could not open plugin dir");
675
exitstatus = EXIT_FAILURE;
676
goto fallback;
677
}
678
679
/* Set the FD_CLOEXEC flag on the directory, if possible */
813
680
{
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;
681
int dir_fd = dirfd(dir);
682
if(dir_fd >= 0){
683
ret = set_cloexec_flag(dir_fd);
684
if(ret < 0){
685
perror("set_cloexec_flag");
686
exitstatus = EXIT_FAILURE;
687
goto fallback;
688
}
844
689
}
845
690
}
846
691
848
693
849
694
/* Read and execute any executable in the plugin directory*/
850
695
while(true){
851
do {
852
dirst = readdir(dir);
853
} while(dirst == NULL and errno == EINTR);
696
dirst = readdir(dir);
854
697
855
698
/* All directory entries have been processed */
856
699
if(dirst == NULL){
857
700
if(errno == EBADF){
858
error(0, errno, "readdir");
859
exitstatus = EX_IOERR;
701
perror("readdir");
702
exitstatus = EXIT_FAILURE;
860
703
goto fallback;
861
704
}
862
705
break;
863
706
}
864
707
708
d_name_len = strlen(dirst->d_name);
709
865
710
/* Ignore dotfiles, backup files and other junk */
866
711
{
867
712
bool bad_name = false;
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);
713
714
const char const *bad_prefixes[] = { ".", "#", NULL };
715
716
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
717
".dpkg-old",
718
".dpkg-bak",
719
".dpkg-divert", NULL };
720
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
721
size_t pre_len = strlen(*pre);
722
if((d_name_len >= pre_len)
723
and strncmp((dirst->d_name), *pre, pre_len) == 0){
724
if(debug){
725
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
726
" with bad prefix %s\n", dirst->d_name, *pre);
727
}
728
bad_name = true;
729
break;
730
}
731
}
732
if(bad_name){
733
continue;
734
}
735
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
736
size_t suf_len = strlen(*suf);
737
if((d_name_len >= suf_len)
738
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
739
== 0)){
740
if(debug){
741
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
742
" with bad suffix %s\n", dirst->d_name, *suf);
743
}
744
bad_name = true;
745
break;
746
}
747
}
748
749
if(bad_name){
750
continue;
751
}
752
}
753
754
char *filename;
755
if(plugindir == NULL){
756
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
757
} else {
758
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
759
}
910
760
if(ret < 0){
911
error(0, errno, "set_cloexec_flag");
912
TEMP_FAILURE_RETRY(close(plugin_fd));
761
perror("asprintf");
913
762
continue;
914
763
}
915
#endif /* O_CLOEXEC */
916
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
764
765
ret = stat(filename, &st);
917
766
if(ret == -1){
918
error(0, errno, "stat");
919
TEMP_FAILURE_RETRY(close(plugin_fd));
767
perror("stat");
768
free(filename);
920
769
continue;
921
770
}
922
771
923
772
/* Ignore non-executable files */
924
if(not S_ISREG(st.st_mode)
925
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, dirst->d_name, X_OK,
926
0)) != 0)){
773
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
927
774
if(debug){
928
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
929
" with bad type or mode\n",
930
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
775
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
776
" with bad type or mode\n", filename);
931
777
}
932
TEMP_FAILURE_RETRY(close(plugin_fd));
778
free(filename);
933
779
continue;
934
780
}
935
781
936
782
plugin *p = getplugin(dirst->d_name);
937
783
if(p == NULL){
938
error(0, errno, "getplugin");
939
TEMP_FAILURE_RETRY(close(plugin_fd));
784
perror("getplugin");
785
free(filename);
940
786
continue;
941
787
}
942
788
if(p->disabled){
944
790
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
945
791
dirst->d_name);
946
792
}
947
TEMP_FAILURE_RETRY(close(plugin_fd));
793
free(filename);
948
794
continue;
949
795
}
950
796
{
953
799
if(g != NULL){
954
800
for(char **a = g->argv + 1; *a != NULL; a++){
955
801
if(not add_argument(p, *a)){
956
error(0, errno, "add_argument");
802
perror("add_argument");
957
803
}
958
804
}
959
805
/* Add global environment variables */
960
806
for(char **e = g->environ; *e != NULL; e++){
961
807
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
808
perror("add_environment");
963
809
}
964
810
}
965
811
}
966
812
}
967
/* If this plugin has any environment variables, we need to
968
duplicate the environment from this process, too. */
813
/* If this plugin has any environment variables, we will call
814
using execve and need to duplicate the environment from this
815
process, too. */
969
816
if(p->environ[0] != NULL){
970
817
for(char **e = environ; *e != NULL; e++){
971
818
if(not add_environment(p, *e, false)){
972
error(0, errno, "add_environment");
819
perror("add_environment");
973
820
}
974
821
}
975
822
}
976
823
977
824
int pipefd[2];
978
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
825
ret = pipe(pipefd);
979
826
if(ret == -1){
980
error(0, errno, "pipe");
981
exitstatus = EX_OSERR;
827
perror("pipe");
828
exitstatus = EXIT_FAILURE;
982
829
goto fallback;
983
830
}
984
831
/* Ask OS to automatic close the pipe on exec */
985
832
ret = set_cloexec_flag(pipefd[0]);
986
833
if(ret < 0){
987
error(0, errno, "set_cloexec_flag");
988
exitstatus = EX_OSERR;
834
perror("set_cloexec_flag");
835
exitstatus = EXIT_FAILURE;
989
836
goto fallback;
990
837
}
991
838
ret = set_cloexec_flag(pipefd[1]);
992
839
if(ret < 0){
993
error(0, errno, "set_cloexec_flag");
994
exitstatus = EX_OSERR;
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
995
842
goto fallback;
996
843
}
997
844
/* Block SIGCHLD until process is safely in process list */
998
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
999
&sigchld_action.sa_mask,
1000
NULL));
845
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1001
846
if(ret < 0){
1002
error(0, errno, "sigprocmask");
1003
exitstatus = EX_OSERR;
847
perror("sigprocmask");
848
exitstatus = EXIT_FAILURE;
1004
849
goto fallback;
1005
850
}
1006
851
/* Starting a new process to be watched */
1007
pid_t pid;
1008
do {
1009
pid = fork();
1010
} while(pid == -1 and errno == EINTR);
852
pid_t pid = fork();
1011
853
if(pid == -1){
1012
error(0, errno, "fork");
1013
exitstatus = EX_OSERR;
854
perror("fork");
855
exitstatus = EXIT_FAILURE;
1014
856
goto fallback;
1015
857
}
1016
858
if(pid == 0){
1017
859
/* this is the child process */
1018
860
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1019
861
if(ret < 0){
1020
error(0, errno, "sigaction");
1021
_exit(EX_OSERR);
862
perror("sigaction");
863
_exit(EXIT_FAILURE);
1022
864
}
1023
865
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1024
866
if(ret < 0){
1025
error(0, errno, "sigprocmask");
1026
_exit(EX_OSERR);
867
perror("sigprocmask");
868
_exit(EXIT_FAILURE);
1027
869
}
1028
870
1029
871
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1030
872
if(ret == -1){
1031
error(0, errno, "dup2");
1032
_exit(EX_OSERR);
873
perror("dup2");
874
_exit(EXIT_FAILURE);
1033
875
}
1034
876
1035
877
if(dirfd(dir) < 0){
1037
879
above and must now close it manually here. */
1038
880
closedir(dir);
1039
881
}
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);
882
if(p->environ[0] == NULL){
883
if(execv(filename, p->argv) < 0){
884
perror("execv");
885
_exit(EXIT_FAILURE);
886
}
887
} else {
888
if(execve(filename, p->argv, p->environ) < 0){
889
perror("execve");
890
_exit(EXIT_FAILURE);
891
}
1045
892
}
1046
893
/* no return */
1047
894
}
1048
895
/* Parent process */
1049
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1050
pipe */
1051
TEMP_FAILURE_RETRY(close(plugin_fd));
896
close(pipefd[1]); /* Close unused write end of pipe */
897
free(filename);
1052
898
plugin *new_plugin = getplugin(dirst->d_name);
1053
899
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)));
900
perror("getplugin");
901
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1058
902
if(ret < 0){
1059
error(0, errno, "sigprocmask");
903
perror("sigprocmask");
1060
904
}
1061
exitstatus = EX_OSERR;
905
exitstatus = EXIT_FAILURE;
1062
906
goto fallback;
1063
907
}
1064
908
1067
911
1068
912
/* Unblock SIGCHLD so signal handler can be run if this process
1069
913
has already completed */
1070
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1071
&sigchld_action.sa_mask,
1072
NULL));
914
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1073
915
if(ret < 0){
1074
error(0, errno, "sigprocmask");
1075
exitstatus = EX_OSERR;
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1076
918
goto fallback;
1077
919
}
1078
920
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
921
FD_SET(new_plugin->fd, &rfds_all);
1093
922
1094
923
if(maxfd < new_plugin->fd){
1095
924
maxfd = new_plugin->fd;
1096
925
}
1097
926
}
1098
927
1099
TEMP_FAILURE_RETRY(closedir(dir));
928
closedir(dir);
1100
929
dir = NULL;
1101
free_plugin(getplugin(NULL));
1102
930
1103
931
for(plugin *p = plugin_list; p != NULL; p = p->next){
1104
932
if(p->pid != 0){
1115
943
while(plugin_list){
1116
944
fd_set rfds = rfds_all;
1117
945
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1118
if(select_ret == -1 and errno != EINTR){
1119
error(0, errno, "select");
1120
exitstatus = EX_OSERR;
946
if(select_ret == -1){
947
perror("select");
948
exitstatus = EXIT_FAILURE;
1121
949
goto fallback;
1122
950
}
1123
951
/* OK, now either a process completed, or something can be read
1124
952
from one of them */
1125
953
for(plugin *proc = plugin_list; proc != NULL;){
1126
954
/* Is this process completely done? */
1127
if(proc->completed and proc->eof){
955
if(proc->eof and proc->completed){
1128
956
/* Only accept the plugin output if it exited cleanly */
1129
957
if(not WIFEXITED(proc->status)
1130
958
or WEXITSTATUS(proc->status) != 0){
1131
959
/* Bad exit by plugin */
1132
960
1133
961
if(debug){
1134
962
if(WIFEXITED(proc->status)){
1135
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1136
" status %d\n", proc->name,
1137
(intmax_t) (proc->pid),
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
1138
965
WEXITSTATUS(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)));
966
} else if(WIFSIGNALED(proc->status)) {
967
fprintf(stderr, "Plugin %u killed by signal %d\n",
968
(unsigned int) (proc->pid),
969
WTERMSIG(proc->status));
1145
970
} else if(WCOREDUMP(proc->status)){
1146
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1147
" core\n", proc->name, (intmax_t) (proc->pid));
971
fprintf(stderr, "Plugin %u dumped core\n",
972
(unsigned int) (proc->pid));
1148
973
}
1149
974
}
1150
975
1151
976
/* Remove the plugin */
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
977
FD_CLR(proc->fd, &rfds_all);
978
1167
979
/* Block signal while modifying process_list */
1168
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1169
(SIG_BLOCK,
1170
&sigchld_action.sa_mask,
1171
NULL));
980
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1172
981
if(ret < 0){
1173
error(0, errno, "sigprocmask");
1174
exitstatus = EX_OSERR;
982
perror("sigprocmask");
983
exitstatus = EXIT_FAILURE;
1175
984
goto fallback;
1176
985
}
1177
986
1180
989
proc = next_plugin;
1181
990
1182
991
/* We are done modifying process list, so unblock signal */
1183
ret = (int)(TEMP_FAILURE_RETRY
1184
(sigprocmask(SIG_UNBLOCK,
1185
&sigchld_action.sa_mask, NULL)));
992
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
993
NULL);
1186
994
if(ret < 0){
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
995
perror("sigprocmask");
996
exitstatus = EXIT_FAILURE;
1189
997
goto fallback;
1190
998
}
1191
999
1201
1009
bool bret = print_out_password(proc->buffer,
1202
1010
proc->buffer_length);
1203
1011
if(not bret){
1204
error(0, errno, "print_out_password");
1205
exitstatus = EX_IOERR;
1012
perror("print_out_password");
1013
exitstatus = EXIT_FAILURE;
1206
1014
}
1207
1015
goto fallback;
1208
1016
}
1209
1017
1210
1018
/* This process has not completed. Does it have any output? */
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
1019
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1228
1020
/* This process had nothing to say at this time */
1229
1021
proc = proc->next;
1230
1022
continue;
1231
1023
}
1232
1024
/* Before reading, make the process' data buffer large enough */
1233
1025
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
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;
1026
proc->buffer = realloc(proc->buffer, proc->buffer_size
1027
+ (size_t) BUFFER_SIZE);
1028
if(proc->buffer == NULL){
1029
perror("malloc");
1030
exitstatus = EXIT_FAILURE;
1239
1031
goto fallback;
1240
1032
}
1241
proc->buffer = new_buffer;
1242
1033
proc->buffer_size += BUFFER_SIZE;
1243
1034
}
1244
1035
/* Read from the process */
1245
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1246
proc->buffer
1247
+ proc->buffer_length,
1248
BUFFER_SIZE));
1036
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1037
BUFFER_SIZE);
1249
1038
if(sret < 0){
1250
1039
/* Read error from this process; ignore the error */
1251
1040
proc = proc->next;
1259
1048
}
1260
1049
}
1261
1050
}
1262
1263
1051
1052
1264
1053
fallback:
1265
1054
1266
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1267
and exitstatus != EX_OK)){
1055
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1268
1056
/* Fallback if all plugins failed, none are found or an error
1269
1057
occured */
1270
1058
bool bret;
1278
1066
}
1279
1067
bret = print_out_password(passwordbuffer, len);
1280
1068
if(not bret){
1281
error(0, errno, "print_out_password");
1282
exitstatus = EX_IOERR;
1069
perror("print_out_password");
1070
exitstatus = EXIT_FAILURE;
1283
1071
}
1284
1072
}
1285
1073
1286
1074
/* Restore old signal handler */
1287
1075
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1288
1076
if(ret == -1){
1289
error(0, errno, "sigaction");
1290
exitstatus = EX_OSERR;
1077
perror("sigaction");
1078
exitstatus = EXIT_FAILURE;
1291
1079
}
1292
1080
1293
1081
if(custom_argv != NULL){
1308
1096
ret = kill(p->pid, SIGTERM);
1309
1097
if(ret == -1 and errno != ESRCH){
1310
1098
/* Set-uid proccesses might not get closed */
1311
error(0, errno, "kill");
1099
perror("kill");
1312
1100
}
1313
1101
}
1314
1102
}
1315
1103
1316
1104
/* Wait for any remaining child processes to terminate */
1317
do {
1105
do{
1318
1106
ret = wait(NULL);
1319
1107
} while(ret >= 0);
1320
1108
if(errno != ECHILD){
1321
error(0, errno, "wait");
1109
perror("wait");
1322
1110
}
1323
1111
1324
1112
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0