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- Committer: Teddy Hogeborn
- Date: 2014-03-06 02:26:04 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 311.
- Revision ID: teddy@recompile.se-20140306022604-4uc43taz25cflgi3
Bug fix: Free all memory and give better messages when memory is full.
* plugin-runner.c (add_to_char_array): Bug fix: If realloc fails, do
not change old array pointer.
(add_environment): Bug fix: If realloc fails, do not change old
environment pointer. Also rename "e" to "envdef"
for clarity.
(main): Bug fix: If realloc fails, do not change old pointers. Also
wrap "#pragma GCC" with "#ifdef ___GNUC___".
* plugins.d/mandos-client.c (incbuffer): Bug fix: if realloc fails,
free old buffer.
(run_network_hooks): Moved variables "directory" and "ret" to their
innermost possible scope.
(take_down_interface): Moved variables "sd", "ret_errno", and
"ret_setflags" to their innermost possible
scope.
(main): Removed variable "interfaces_hooks_size". Also, if argz_add
fails when adding all found interfaces, the error message
will now be correct. Also print error message if, after
having taken up an interface, argz_add fails to add
interface to list of interfaces to be taken down.
* plugins.d/mandos-client.xml (OPTIONS): Explain better what "none"
means as argument to
"--interface" by negating
sense.
* plugins.d/password-prompt.c (fprintf_plus): Removed (unused).
* plugin-runner.c (add_to_char_array): Bug fix: If realloc fails, do
not change old array pointer.
(add_environment): Bug fix: If realloc fails, do not change old
environment pointer. Also rename "e" to "envdef"
for clarity.
(main): Bug fix: If realloc fails, do not change old pointers. Also
wrap "#pragma GCC" with "#ifdef ___GNUC___".
* plugins.d/mandos-client.c (incbuffer): Bug fix: if realloc fails,
free old buffer.
(run_network_hooks): Moved variables "directory" and "ret" to their
innermost possible scope.
(take_down_interface): Moved variables "sd", "ret_errno", and
"ret_setflags" to their innermost possible
scope.
(main): Removed variable "interfaces_hooks_size". Also, if argz_add
fails when adding all found interfaces, the error message
will now be correct. Also print error message if, after
having taken up an interface, argz_add fails to add
interface to list of interfaces to be taken down.
* plugins.d/mandos-client.xml (OPTIONS): Explain better what "none"
means as argument to
"--interface" by negating
sense.
* plugins.d/password-prompt.c (fprintf_plus): Removed (unused).
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- 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 © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 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
asprintf(), 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(),
31
#include <stdio.h> /* fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
#include <sys/types.h> /* DIR, fdopendir(), 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() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
42
43
#include <sys/stat.h> /* struct stat, stat(), 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
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
47
48
fcntl(), setuid(), setgid(),
52
53
close() */
53
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
55
FD_CLOEXEC */
55
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), 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 */
67
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
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() */
68
75
69
76
#define BUFFER_SIZE 256
70
77
72
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
73
80
74
81
const char *argp_program_version = "plugin-runner " VERSION;
75
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
83
77
84
typedef struct plugin{
78
85
char *name; /* can be NULL or any plugin name */
81
88
char **environ;
82
89
int envc;
83
90
bool disabled;
84
91
85
92
/* Variables used for running processes*/
86
93
pid_t pid;
87
94
int fd;
89
96
size_t buffer_size;
90
97
size_t buffer_length;
91
98
bool eof;
92
volatile bool completed;
93
volatile int status;
99
volatile sig_atomic_t completed;
100
int status;
94
101
struct plugin *next;
95
102
} plugin;
96
103
99
106
/* Gets an existing plugin based on name,
100
107
or if none is found, creates a new one */
101
108
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
109
/* Check for existing plugin with that name */
103
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
104
111
if((p->name == name)
105
112
or (p->name and name and (strcmp(p->name, name) == 0))){
107
114
}
108
115
}
109
116
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
117
plugin *new_plugin = NULL;
118
do {
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
111
121
if(new_plugin == NULL){
112
122
return NULL;
113
123
}
114
124
char *copy_name = NULL;
115
125
if(name != NULL){
116
copy_name = strdup(name);
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
117
129
if(copy_name == NULL){
130
int e = errno;
118
131
free(new_plugin);
132
errno = e;
119
133
return NULL;
120
134
}
121
135
}
122
136
123
*new_plugin = (plugin) { .name = copy_name,
124
.argc = 1,
125
.disabled = false,
126
.next = plugin_list };
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
127
141
128
new_plugin->argv = malloc(sizeof(char *) * 2);
142
do {
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
129
145
if(new_plugin->argv == NULL){
146
int e = errno;
130
147
free(copy_name);
131
148
free(new_plugin);
149
errno = e;
132
150
return NULL;
133
151
}
134
152
new_plugin->argv[0] = copy_name;
135
153
new_plugin->argv[1] = NULL;
136
154
137
new_plugin->environ = malloc(sizeof(char *));
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
138
158
if(new_plugin->environ == NULL){
159
int e = errno;
139
160
free(copy_name);
140
161
free(new_plugin->argv);
141
162
free(new_plugin);
163
errno = e;
142
164
return NULL;
143
165
}
144
166
new_plugin->environ[0] = NULL;
149
171
}
150
172
151
173
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
152
175
static bool add_to_char_array(const char *new, char ***array,
153
176
int *len){
154
177
/* Resize the pointed-to array to hold one more pointer */
155
*array = realloc(*array, sizeof(char *)
156
* (size_t) ((*len) + 2));
178
char **new_array = NULL;
179
do {
180
new_array = realloc(*array, sizeof(char *)
181
* (size_t) ((*len) + 2));
182
} while(new_array == NULL and errno == EINTR);
157
183
/* Malloc check */
158
if(*array == NULL){
184
if(new_array == NULL){
159
185
return false;
160
186
}
187
*array = new_array;
161
188
/* Make a copy of the new string */
162
char *copy = strdup(new);
189
char *copy;
190
do {
191
copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
163
193
if(copy == NULL){
164
194
return false;
165
195
}
172
202
}
173
203
174
204
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
175
206
static bool add_argument(plugin *p, const char *arg){
176
207
if(p == NULL){
177
208
return false;
180
211
}
181
212
182
213
/* Add to a plugin's environment */
214
__attribute__((nonnull(2)))
183
215
static bool add_environment(plugin *p, const char *def, bool replace){
184
216
if(p == NULL){
185
217
return false;
187
219
/* namelen = length of name of environment variable */
188
220
size_t namelen = (size_t)(strchrnul(def, '=') - def);
189
221
/* Search for this environment variable */
190
for(char **e = p->environ; *e != NULL; e++){
191
if(strncmp(*e, def, namelen + 1) == 0){
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
192
224
/* It already exists */
193
225
if(replace){
194
char *new = realloc(*e, strlen(def) + 1);
195
if(new == NULL){
226
char *new_envdef;
227
do {
228
new_envdef = realloc(*envdef, strlen(def) + 1);
229
} while(new_envdef == NULL and errno == EINTR);
230
if(new_envdef == NULL){
196
231
return false;
197
232
}
198
*e = new;
199
strcpy(*e, def);
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
200
235
}
201
236
return true;
202
237
}
207
242
/*
208
243
* Based on the example in the GNU LibC manual chapter 13.13 "File
209
244
* Descriptor Flags".
210
* *Note File Descriptor Flags:(libc)Descriptor Flags.
245
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
211
246
*/
212
247
static int set_cloexec_flag(int fd){
213
int ret = fcntl(fd, F_GETFD, 0);
248
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
249
/* If reading the flags failed, return error indication now. */
215
250
if(ret < 0){
216
251
return ret;
217
252
}
218
253
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
254
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
255
ret | FD_CLOEXEC));
220
256
}
221
257
222
258
223
259
/* Mark processes as completed when they exit, and save their exit
224
260
status. */
225
261
static void handle_sigchld(__attribute__((unused)) int sig){
262
int old_errno = errno;
226
263
while(true){
227
264
plugin *proc = plugin_list;
228
265
int status;
232
269
break;
233
270
}
234
271
if(pid == -1){
235
if(errno != ECHILD){
236
perror("waitpid");
272
if(errno == ECHILD){
273
/* No child processes */
274
break;
237
275
}
238
/* No child processes */
239
break;
276
error(0, errno, "waitpid");
240
277
}
241
278
242
279
/* A child exited, find it in process_list */
248
285
continue;
249
286
}
250
287
proc->status = status;
251
proc->completed = true;
288
proc->completed = 1;
252
289
}
290
errno = old_errno;
253
291
}
254
292
255
293
/* Prints out a password to stdout */
294
__attribute__((nonnull))
256
295
static bool print_out_password(const char *buffer, size_t length){
257
296
ssize_t ret;
258
297
for(size_t written = 0; written < length; written += (size_t)ret){
266
305
}
267
306
268
307
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
269
309
static void free_plugin(plugin *plugin_node){
270
310
271
311
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
277
317
}
278
318
free(plugin_node->environ);
279
319
free(plugin_node->buffer);
280
320
281
321
/* Removes the plugin from the singly-linked list */
282
322
if(plugin_node == plugin_list){
283
323
/* First one - simple */
310
350
struct dirent *dirst;
311
351
struct stat st;
312
352
fd_set rfds_all;
313
int ret, numchars, maxfd = 0;
353
int ret, maxfd = 0;
314
354
ssize_t sret;
315
intmax_t tmpmax;
316
355
uid_t uid = 65534;
317
356
gid_t gid = 65534;
318
357
bool debug = false;
327
366
sigemptyset(&sigchld_action.sa_mask);
328
367
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
329
368
if(ret == -1){
330
perror("sigaddset");
331
exitstatus = EXIT_FAILURE;
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
332
371
goto fallback;
333
372
}
334
373
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
335
374
if(ret == -1){
336
perror("sigaction");
337
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
338
377
goto fallback;
339
378
}
340
379
372
411
.doc = "Group ID the plugins will run as", .group = 3 },
373
412
{ .name = "debug", .key = 132,
374
413
.doc = "Debug mode", .group = 4 },
414
/*
415
* These reproduce what we would get without ARGP_NO_HELP
416
*/
417
{ .name = "help", .key = '?',
418
.doc = "Give this help list", .group = -1 },
419
{ .name = "usage", .key = -3,
420
.doc = "Give a short usage message", .group = -1 },
421
{ .name = "version", .key = 'V',
422
.doc = "Print program version", .group = -1 },
375
423
{ .name = NULL }
376
424
};
377
425
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state) {
380
switch(key) {
426
__attribute__((nonnull(3)))
427
error_t parse_opt(int key, char *arg, struct argp_state *state){
428
errno = 0;
429
switch(key){
430
char *tmp;
431
intmax_t tmp_id;
381
432
case 'g': /* --global-options */
382
if(arg != NULL){
383
char *p;
384
while((p = strsep(&arg, ",")) != NULL){
385
if(p[0] == '\0'){
386
continue;
387
}
388
if(not add_argument(getplugin(NULL), p)){
389
perror("add_argument");
390
return ARGP_ERR_UNKNOWN;
433
{
434
char *plugin_option;
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
437
break;
391
438
}
392
439
}
393
440
}
394
441
break;
395
442
case 'G': /* --global-env */
396
if(arg == NULL){
397
break;
398
}
399
if(not add_environment(getplugin(NULL), arg, true)){
400
perror("add_environment");
401
}
443
add_environment(getplugin(NULL), arg, true);
402
444
break;
403
445
case 'o': /* --options-for */
404
if(arg != NULL){
405
char *p_name = strsep(&arg, ":");
406
if(p_name[0] == '\0' or arg == NULL){
407
break;
408
}
409
char *opt = strsep(&arg, ":");
410
if(opt[0] == '\0' or opt == NULL){
411
break;
412
}
413
char *p;
414
while((p = strsep(&opt, ",")) != NULL){
415
if(p[0] == '\0'){
416
continue;
417
}
418
if(not add_argument(getplugin(p_name), p)){
419
perror("add_argument");
420
return ARGP_ERR_UNKNOWN;
446
{
447
char *option_list = strchr(arg, ':');
448
if(option_list == NULL){
449
argp_error(state, "No colon in \"%s\"", arg);
450
errno = EINVAL;
451
break;
452
}
453
*option_list = '\0';
454
option_list++;
455
if(arg[0] == '\0'){
456
argp_error(state, "Empty plugin name");
457
errno = EINVAL;
458
break;
459
}
460
char *option;
461
while((option = strsep(&option_list, ",")) != NULL){
462
if(not add_argument(getplugin(arg), option)){
463
break;
421
464
}
422
465
}
423
466
}
424
467
break;
425
468
case 'E': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
429
469
{
430
470
char *envdef = strchr(arg, ':');
431
471
if(envdef == NULL){
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
432
474
break;
433
475
}
434
476
*envdef = '\0';
435
if(not add_environment(getplugin(arg), envdef+1, true)){
436
perror("add_environment");
477
envdef++;
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
437
482
}
483
add_environment(getplugin(arg), envdef, true);
438
484
}
439
485
break;
440
486
case 'd': /* --disable */
441
if(arg != NULL){
487
{
442
488
plugin *p = getplugin(arg);
443
if(p == NULL){
444
return ARGP_ERR_UNKNOWN;
489
if(p != NULL){
490
p->disabled = true;
445
491
}
446
p->disabled = true;
447
492
}
448
493
break;
449
494
case 'e': /* --enable */
450
if(arg != NULL){
495
{
451
496
plugin *p = getplugin(arg);
452
if(p == NULL){
453
return ARGP_ERR_UNKNOWN;
497
if(p != NULL){
498
p->disabled = false;
454
499
}
455
p->disabled = false;
456
500
}
457
501
break;
458
502
case 128: /* --plugin-dir */
459
503
free(plugindir);
460
504
plugindir = strdup(arg);
461
if(plugindir == NULL){
462
perror("strdup");
463
}
464
505
break;
465
506
case 129: /* --config-file */
466
507
/* This is already done by parse_opt_config_file() */
467
508
break;
468
509
case 130: /* --userid */
469
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
470
if(ret < 1 or tmpmax != (uid_t)tmpmax
471
or arg[numchars] != '\0'){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
474
} else {
475
uid = (uid_t)tmpmax;
510
tmp_id = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmp_id != (uid_t)tmp_id){
513
argp_error(state, "Bad user ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)uid);
515
break;
476
516
}
517
uid = (uid_t)tmp_id;
477
518
break;
478
519
case 131: /* --groupid */
479
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
480
if(ret < 1 or tmpmax != (gid_t)tmpmax
481
or arg[numchars] != '\0'){
482
fprintf(stderr, "Bad group ID number: \"%s\", using %"
483
PRIdMAX "\n", arg, (intmax_t)gid);
484
} else {
485
gid = (gid_t)tmpmax;
520
tmp_id = strtoimax(arg, &tmp, 10);
521
if(errno != 0 or tmp == arg or *tmp != '\0'
522
or tmp_id != (gid_t)tmp_id){
523
argp_error(state, "Bad group ID number: \"%s\", using %"
524
PRIdMAX, arg, (intmax_t)gid);
525
break;
486
526
}
527
gid = (gid_t)tmp_id;
487
528
break;
488
529
case 132: /* --debug */
489
530
debug = true;
490
531
break;
532
/*
533
* These reproduce what we would get without ARGP_NO_HELP
534
*/
535
case '?': /* --help */
536
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
537
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
538
case -3: /* --usage */
539
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
540
argp_state_help(state, state->out_stream,
541
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
542
case 'V': /* --version */
543
fprintf(state->out_stream, "%s\n", argp_program_version);
544
exit(EXIT_SUCCESS);
545
break;
491
546
/*
492
547
* When adding more options before this line, remember to also add a
493
548
* "case" to the "parse_opt_config_file" function below.
496
551
/* Cryptsetup always passes an argument, which is an empty
497
552
string if "none" was specified in /etc/crypttab. So if
498
553
argument was empty, we ignore it silently. */
499
if(arg[0] != '\0'){
500
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
554
if(arg[0] == '\0'){
555
break;
501
556
}
502
break;
503
case ARGP_KEY_END:
504
break;
505
557
default:
506
558
return ARGP_ERR_UNKNOWN;
507
559
}
508
return 0;
560
return errno; /* Set to 0 at start */
509
561
}
510
562
511
563
/* This option parser is the same as parse_opt() above, except it
512
564
ignores everything but the --config-file option. */
513
565
error_t parse_opt_config_file(int key, char *arg,
514
566
__attribute__((unused))
515
struct argp_state *state) {
516
switch(key) {
567
struct argp_state *state){
568
errno = 0;
569
switch(key){
517
570
case 'g': /* --global-options */
518
571
case 'G': /* --global-env */
519
572
case 'o': /* --options-for */
525
578
case 129: /* --config-file */
526
579
free(argfile);
527
580
argfile = strdup(arg);
528
if(argfile == NULL){
529
perror("strdup");
530
}
531
break;
581
break;
532
582
case 130: /* --userid */
533
583
case 131: /* --groupid */
534
584
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
535
588
case ARGP_KEY_ARG:
536
case ARGP_KEY_END:
537
589
break;
538
590
default:
539
591
return ARGP_ERR_UNKNOWN;
540
592
}
541
return 0;
593
return errno;
542
594
}
543
595
544
596
struct argp argp = { .options = options,
548
600
549
601
/* Parse using parse_opt_config_file() in order to get the custom
550
602
config file location, if any. */
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
553
fprintf(stderr, "Unknown error while parsing arguments\n");
554
exitstatus = EXIT_FAILURE;
603
ret = argp_parse(&argp, argc, argv,
604
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
605
NULL, NULL);
606
switch(ret){
607
case 0:
608
break;
609
case ENOMEM:
610
default:
611
errno = ret;
612
error(0, errno, "argp_parse");
613
exitstatus = EX_OSERR;
614
goto fallback;
615
case EINVAL:
616
exitstatus = EX_USAGE;
555
617
goto fallback;
556
618
}
557
619
563
625
conffp = fopen(AFILE, "r");
564
626
} else {
565
627
conffp = fopen(argfile, "r");
566
}
628
}
567
629
if(conffp != NULL){
568
630
char *org_line = NULL;
569
631
char *p, *arg, *new_arg, *line;
570
632
size_t size = 0;
571
633
const char whitespace_delims[] = " \r\t\f\v\n";
572
634
const char comment_delim[] = "#";
573
635
574
636
custom_argc = 1;
575
637
custom_argv = malloc(sizeof(char*) * 2);
576
638
if(custom_argv == NULL){
577
perror("malloc");
578
exitstatus = EXIT_FAILURE;
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
579
641
goto fallback;
580
642
}
581
643
custom_argv[0] = argv[0];
582
644
custom_argv[1] = NULL;
583
645
584
646
/* for each line in the config file, strip whitespace and ignore
585
647
commented text */
586
648
while(true){
588
650
if(sret == -1){
589
651
break;
590
652
}
591
653
592
654
line = org_line;
593
655
arg = strsep(&line, comment_delim);
594
656
while((p = strsep(&arg, whitespace_delims)) != NULL){
597
659
}
598
660
new_arg = strdup(p);
599
661
if(new_arg == NULL){
600
perror("strdup");
601
exitstatus = EXIT_FAILURE;
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
602
664
free(org_line);
603
665
goto fallback;
604
666
}
605
667
606
668
custom_argc += 1;
607
custom_argv = realloc(custom_argv, sizeof(char *)
608
* ((unsigned int) custom_argc + 1));
609
if(custom_argv == NULL){
610
perror("realloc");
611
exitstatus = EXIT_FAILURE;
612
free(org_line);
613
goto fallback;
669
{
670
char **new_argv = realloc(custom_argv, sizeof(char *)
671
* ((unsigned int)
672
custom_argc + 1));
673
if(new_argv == NULL){
674
error(0, errno, "realloc");
675
exitstatus = EX_OSERR;
676
free(new_arg);
677
free(org_line);
678
goto fallback;
679
} else {
680
custom_argv = new_argv;
681
}
614
682
}
615
683
custom_argv[custom_argc-1] = new_arg;
616
custom_argv[custom_argc] = NULL;
684
custom_argv[custom_argc] = NULL;
617
685
}
618
686
}
687
do {
688
ret = fclose(conffp);
689
} while(ret == EOF and errno == EINTR);
690
if(ret == EOF){
691
error(0, errno, "fclose");
692
exitstatus = EX_IOERR;
693
goto fallback;
694
}
619
695
free(org_line);
620
696
} else {
621
697
/* Check for harmful errors and go to fallback. Other errors might
622
698
not affect opening plugins */
623
699
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
624
perror("fopen");
625
exitstatus = EXIT_FAILURE;
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
626
702
goto fallback;
627
703
}
628
704
}
629
/* If there was any arguments from configuration file,
630
pass them to parser as command arguments */
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
631
707
if(custom_argv != NULL){
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
633
0, NULL);
634
if(ret == ARGP_ERR_UNKNOWN){
635
fprintf(stderr, "Unknown error while parsing arguments\n");
636
exitstatus = EXIT_FAILURE;
708
ret = argp_parse(&argp, custom_argc, custom_argv,
709
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
710
NULL, NULL);
711
switch(ret){
712
case 0:
713
break;
714
case ENOMEM:
715
default:
716
errno = ret;
717
error(0, errno, "argp_parse");
718
exitstatus = EX_OSERR;
719
goto fallback;
720
case EINVAL:
721
exitstatus = EX_CONFIG;
637
722
goto fallback;
638
723
}
639
724
}
640
725
641
726
/* Parse actual command line arguments, to let them override the
642
727
config file */
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
645
fprintf(stderr, "Unknown error while parsing arguments\n");
646
exitstatus = EXIT_FAILURE;
728
ret = argp_parse(&argp, argc, argv,
729
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
730
NULL, NULL);
731
switch(ret){
732
case 0:
733
break;
734
case ENOMEM:
735
default:
736
errno = ret;
737
error(0, errno, "argp_parse");
738
exitstatus = EX_OSERR;
739
goto fallback;
740
case EINVAL:
741
exitstatus = EX_USAGE;
647
742
goto fallback;
648
743
}
649
744
661
756
}
662
757
}
663
758
664
/* Strip permissions down to nobody */
759
if(getuid() == 0){
760
/* Work around Debian bug #633582:
761
<http://bugs.debian.org/633582> */
762
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
763
if(plugindir_fd == -1){
764
error(0, errno, "open");
765
} else {
766
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
767
if(ret == -1){
768
error(0, errno, "fstat");
769
} else {
770
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
771
ret = fchown(plugindir_fd, uid, gid);
772
if(ret == -1){
773
error(0, errno, "fchown");
774
}
775
}
776
}
777
TEMP_FAILURE_RETRY(close(plugindir_fd));
778
}
779
}
780
781
/* Lower permissions */
782
ret = setgid(gid);
783
if(ret == -1){
784
error(0, errno, "setgid");
785
}
665
786
ret = setuid(uid);
666
787
if(ret == -1){
667
perror("setuid");
668
}
669
setgid(gid);
670
if(ret == -1){
671
perror("setgid");
672
}
673
674
if(plugindir == NULL){
675
dir = opendir(PDIR);
676
} else {
677
dir = opendir(plugindir);
678
}
679
680
if(dir == NULL){
681
perror("Could not open plugin dir");
682
exitstatus = EXIT_FAILURE;
683
goto fallback;
684
}
685
686
/* Set the FD_CLOEXEC flag on the directory, if possible */
788
error(0, errno, "setuid");
789
}
790
791
/* Open plugin directory with close_on_exec flag */
687
792
{
688
int dir_fd = dirfd(dir);
689
if(dir_fd >= 0){
690
ret = set_cloexec_flag(dir_fd);
691
if(ret < 0){
692
perror("set_cloexec_flag");
693
exitstatus = EXIT_FAILURE;
694
goto fallback;
695
}
793
int dir_fd = -1;
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
} else {
803
dir_fd = open(plugindir, O_RDONLY |
804
#ifdef O_CLOEXEC
805
O_CLOEXEC
806
#else /* not O_CLOEXEC */
807
0
808
#endif /* not O_CLOEXEC */
809
);
810
}
811
if(dir_fd == -1){
812
error(0, errno, "Could not open plugin dir");
813
exitstatus = EX_UNAVAILABLE;
814
goto fallback;
815
}
816
817
#ifndef O_CLOEXEC
818
/* Set the FD_CLOEXEC flag on the directory */
819
ret = set_cloexec_flag(dir_fd);
820
if(ret < 0){
821
error(0, errno, "set_cloexec_flag");
822
TEMP_FAILURE_RETRY(close(dir_fd));
823
exitstatus = EX_OSERR;
824
goto fallback;
825
}
826
#endif /* O_CLOEXEC */
827
828
dir = fdopendir(dir_fd);
829
if(dir == NULL){
830
error(0, errno, "Could not open plugin dir");
831
TEMP_FAILURE_RETRY(close(dir_fd));
832
exitstatus = EX_OSERR;
833
goto fallback;
696
834
}
697
835
}
698
836
700
838
701
839
/* Read and execute any executable in the plugin directory*/
702
840
while(true){
703
dirst = readdir(dir);
841
do {
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
704
844
705
845
/* All directory entries have been processed */
706
846
if(dirst == NULL){
707
847
if(errno == EBADF){
708
perror("readdir");
709
exitstatus = EXIT_FAILURE;
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
710
850
goto fallback;
711
851
}
712
852
break;
718
858
{
719
859
bool bad_name = false;
720
860
721
const char const *bad_prefixes[] = { ".", "#", NULL };
861
const char * const bad_prefixes[] = { ".", "#", NULL };
722
862
723
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
724
864
".dpkg-old",
725
865
".dpkg-bak",
726
866
".dpkg-divert", NULL };
727
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
867
#ifdef __GNUC__
868
#pragma GCC diagnostic push
869
#pragma GCC diagnostic ignored "-Wcast-qual"
870
#endif
871
for(const char **pre = (const char **)bad_prefixes;
872
*pre != NULL; pre++){
873
#ifdef __GNUC__
874
#pragma GCC diagnostic pop
875
#endif
728
876
size_t pre_len = strlen(*pre);
729
877
if((d_name_len >= pre_len)
730
878
and strncmp((dirst->d_name), *pre, pre_len) == 0){
739
887
if(bad_name){
740
888
continue;
741
889
}
742
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
890
#ifdef __GNUC__
891
#pragma GCC diagnostic push
892
#pragma GCC diagnostic ignored "-Wcast-qual"
893
#endif
894
for(const char **suf = (const char **)bad_suffixes;
895
*suf != NULL; suf++){
896
#ifdef __GNUC__
897
#pragma GCC diagnostic pop
898
#endif
743
899
size_t suf_len = strlen(*suf);
744
900
if((d_name_len >= suf_len)
745
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
746
902
== 0)){
747
903
if(debug){
748
904
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
757
913
continue;
758
914
}
759
915
}
760
916
761
917
char *filename;
762
918
if(plugindir == NULL){
763
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
919
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
920
dirst->d_name));
764
921
} else {
765
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
922
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
923
plugindir,
924
dirst->d_name));
766
925
}
767
926
if(ret < 0){
768
perror("asprintf");
927
error(0, errno, "asprintf");
769
928
continue;
770
929
}
771
930
772
ret = stat(filename, &st);
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
773
932
if(ret == -1){
774
perror("stat");
933
error(0, errno, "stat");
775
934
free(filename);
776
935
continue;
777
936
}
778
937
779
938
/* Ignore non-executable files */
780
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
939
if(not S_ISREG(st.st_mode)
940
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
781
941
if(debug){
782
942
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
783
943
" with bad type or mode\n", filename);
788
948
789
949
plugin *p = getplugin(dirst->d_name);
790
950
if(p == NULL){
791
perror("getplugin");
951
error(0, errno, "getplugin");
792
952
free(filename);
793
953
continue;
794
954
}
806
966
if(g != NULL){
807
967
for(char **a = g->argv + 1; *a != NULL; a++){
808
968
if(not add_argument(p, *a)){
809
perror("add_argument");
969
error(0, errno, "add_argument");
810
970
}
811
971
}
812
972
/* Add global environment variables */
813
973
for(char **e = g->environ; *e != NULL; e++){
814
974
if(not add_environment(p, *e, false)){
815
perror("add_environment");
975
error(0, errno, "add_environment");
816
976
}
817
977
}
818
978
}
823
983
if(p->environ[0] != NULL){
824
984
for(char **e = environ; *e != NULL; e++){
825
985
if(not add_environment(p, *e, false)){
826
perror("add_environment");
986
error(0, errno, "add_environment");
827
987
}
828
988
}
829
989
}
830
990
831
991
int pipefd[2];
832
ret = pipe(pipefd);
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
833
993
if(ret == -1){
834
perror("pipe");
835
exitstatus = EXIT_FAILURE;
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
836
996
goto fallback;
837
997
}
838
998
/* Ask OS to automatic close the pipe on exec */
839
999
ret = set_cloexec_flag(pipefd[0]);
840
1000
if(ret < 0){
841
perror("set_cloexec_flag");
842
exitstatus = EXIT_FAILURE;
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
843
1003
goto fallback;
844
1004
}
845
1005
ret = set_cloexec_flag(pipefd[1]);
846
1006
if(ret < 0){
847
perror("set_cloexec_flag");
848
exitstatus = EXIT_FAILURE;
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
849
1009
goto fallback;
850
1010
}
851
1011
/* Block SIGCHLD until process is safely in process list */
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1012
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1013
&sigchld_action.sa_mask,
1014
NULL));
853
1015
if(ret < 0){
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
856
1018
goto fallback;
857
1019
}
858
1020
/* Starting a new process to be watched */
859
pid_t pid = fork();
1021
pid_t pid;
1022
do {
1023
pid = fork();
1024
} while(pid == -1 and errno == EINTR);
860
1025
if(pid == -1){
861
perror("fork");
862
exitstatus = EXIT_FAILURE;
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
863
1028
goto fallback;
864
1029
}
865
1030
if(pid == 0){
866
1031
/* this is the child process */
867
1032
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
868
1033
if(ret < 0){
869
perror("sigaction");
870
_exit(EXIT_FAILURE);
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
871
1036
}
872
1037
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
873
1038
if(ret < 0){
874
perror("sigprocmask");
875
_exit(EXIT_FAILURE);
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
876
1041
}
877
1042
878
1043
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
879
1044
if(ret == -1){
880
perror("dup2");
881
_exit(EXIT_FAILURE);
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
882
1047
}
883
1048
884
1049
if(dirfd(dir) < 0){
888
1053
}
889
1054
if(p->environ[0] == NULL){
890
1055
if(execv(filename, p->argv) < 0){
891
perror("execv");
892
_exit(EXIT_FAILURE);
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
893
1058
}
894
1059
} else {
895
1060
if(execve(filename, p->argv, p->environ) < 0){
896
perror("execve");
897
_exit(EXIT_FAILURE);
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
898
1063
}
899
1064
}
900
1065
/* no return */
901
1066
}
902
1067
/* Parent process */
903
close(pipefd[1]); /* Close unused write end of pipe */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1069
pipe */
904
1070
free(filename);
905
1071
plugin *new_plugin = getplugin(dirst->d_name);
906
1072
if(new_plugin == NULL){
907
perror("getplugin");
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1073
error(0, errno, "getplugin");
1074
ret = (int)(TEMP_FAILURE_RETRY
1075
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1076
NULL)));
909
1077
if(ret < 0){
910
perror("sigprocmask");
1078
error(0, errno, "sigprocmask");
911
1079
}
912
exitstatus = EXIT_FAILURE;
1080
exitstatus = EX_OSERR;
913
1081
goto fallback;
914
1082
}
915
1083
918
1086
919
1087
/* Unblock SIGCHLD so signal handler can be run if this process
920
1088
has already completed */
921
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
1091
NULL));
922
1092
if(ret < 0){
923
perror("sigprocmask");
924
exitstatus = EXIT_FAILURE;
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
925
1095
goto fallback;
926
1096
}
927
1097
928
FD_SET(new_plugin->fd, &rfds_all);
1098
#if defined (__GNUC__) and defined (__GLIBC__)
1099
#if not __GLIBC_PREREQ(2, 16)
1100
#pragma GCC diagnostic push
1101
#pragma GCC diagnostic ignored "-Wsign-conversion"
1102
#endif
1103
#endif
1104
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion in GNU libc
1106
before 2.16 */
1107
#if defined (__GNUC__) and defined (__GLIBC__)
1108
#if not __GLIBC_PREREQ(2, 16)
1109
#pragma GCC diagnostic pop
1110
#endif
1111
#endif
929
1112
930
1113
if(maxfd < new_plugin->fd){
931
1114
maxfd = new_plugin->fd;
932
1115
}
933
1116
}
934
1117
935
closedir(dir);
1118
TEMP_FAILURE_RETRY(closedir(dir));
936
1119
dir = NULL;
1120
free_plugin(getplugin(NULL));
937
1121
938
1122
for(plugin *p = plugin_list; p != NULL; p = p->next){
939
1123
if(p->pid != 0){
950
1134
while(plugin_list){
951
1135
fd_set rfds = rfds_all;
952
1136
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
953
if(select_ret == -1){
954
perror("select");
955
exitstatus = EXIT_FAILURE;
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
956
1140
goto fallback;
957
1141
}
958
1142
/* OK, now either a process completed, or something can be read
959
1143
from one of them */
960
1144
for(plugin *proc = plugin_list; proc != NULL;){
961
1145
/* Is this process completely done? */
962
if(proc->eof and proc->completed){
1146
if(proc->completed and proc->eof){
963
1147
/* Only accept the plugin output if it exited cleanly */
964
1148
if(not WIFEXITED(proc->status)
965
1149
or WEXITSTATUS(proc->status) != 0){
966
1150
/* Bad exit by plugin */
967
1151
968
1152
if(debug){
969
1153
if(WIFEXITED(proc->status)){
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %d\n", (intmax_t) (proc->pid),
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
972
1157
WEXITSTATUS(proc->status));
973
} else if(WIFSIGNALED(proc->status)) {
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
976
WTERMSIG(proc->status));
1158
} else if(WIFSIGNALED(proc->status)){
1159
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1160
" signal %d: %s\n", proc->name,
1161
(intmax_t) (proc->pid),
1162
WTERMSIG(proc->status),
1163
strsignal(WTERMSIG(proc->status)));
977
1164
} else if(WCOREDUMP(proc->status)){
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(intmax_t) (proc->pid));
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
980
1167
}
981
1168
}
982
1169
983
1170
/* Remove the plugin */
984
FD_CLR(proc->fd, &rfds_all);
985
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic push
1174
#pragma GCC diagnostic ignored "-Wsign-conversion"
1175
#endif
1176
#endif
1177
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1178
-Wconversion in GNU libc
1179
before 2.16 */
1180
#if defined (__GNUC__) and defined (__GLIBC__)
1181
#if not __GLIBC_PREREQ(2, 16)
1182
#pragma GCC diagnostic pop
1183
#endif
1184
#endif
1185
986
1186
/* Block signal while modifying process_list */
987
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1188
(SIG_BLOCK,
1189
&sigchld_action.sa_mask,
1190
NULL));
988
1191
if(ret < 0){
989
perror("sigprocmask");
990
exitstatus = EXIT_FAILURE;
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
991
1194
goto fallback;
992
1195
}
993
1196
996
1199
proc = next_plugin;
997
1200
998
1201
/* We are done modifying process list, so unblock signal */
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1000
NULL);
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
1001
1205
if(ret < 0){
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
1004
1208
goto fallback;
1005
1209
}
1006
1210
1016
1220
bool bret = print_out_password(proc->buffer,
1017
1221
proc->buffer_length);
1018
1222
if(not bret){
1019
perror("print_out_password");
1020
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
1021
1225
}
1022
1226
goto fallback;
1023
1227
}
1024
1228
1025
1229
/* This process has not completed. Does it have any output? */
1026
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1230
#if defined (__GNUC__) and defined (__GLIBC__)
1231
#if not __GLIBC_PREREQ(2, 16)
1232
#pragma GCC diagnostic push
1233
#pragma GCC diagnostic ignored "-Wsign-conversion"
1234
#endif
1235
#endif
1236
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1237
warning from
1238
-Wconversion
1239
in GNU libc
1240
before
1241
2.16 */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic pop
1245
#endif
1246
#endif
1027
1247
/* This process had nothing to say at this time */
1028
1248
proc = proc->next;
1029
1249
continue;
1030
1250
}
1031
1251
/* Before reading, make the process' data buffer large enough */
1032
1252
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1033
proc->buffer = realloc(proc->buffer, proc->buffer_size
1034
+ (size_t) BUFFER_SIZE);
1035
if(proc->buffer == NULL){
1036
perror("malloc");
1037
exitstatus = EXIT_FAILURE;
1253
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1254
+ (size_t) BUFFER_SIZE);
1255
if(new_buffer == NULL){
1256
error(0, errno, "malloc");
1257
exitstatus = EX_OSERR;
1038
1258
goto fallback;
1039
1259
}
1260
proc->buffer = new_buffer;
1040
1261
proc->buffer_size += BUFFER_SIZE;
1041
1262
}
1042
1263
/* Read from the process */
1043
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1044
BUFFER_SIZE);
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1265
proc->buffer
1266
+ proc->buffer_length,
1267
BUFFER_SIZE));
1045
1268
if(sret < 0){
1046
1269
/* Read error from this process; ignore the error */
1047
1270
proc = proc->next;
1055
1278
}
1056
1279
}
1057
1280
}
1058
1059
1281
1282
1060
1283
fallback:
1061
1284
1062
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
1063
1287
/* Fallback if all plugins failed, none are found or an error
1064
1288
occured */
1065
1289
bool bret;
1073
1297
}
1074
1298
bret = print_out_password(passwordbuffer, len);
1075
1299
if(not bret){
1076
perror("print_out_password");
1077
exitstatus = EXIT_FAILURE;
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
1078
1302
}
1079
1303
}
1080
1304
1081
1305
/* Restore old signal handler */
1082
1306
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1083
1307
if(ret == -1){
1084
perror("sigaction");
1085
exitstatus = EXIT_FAILURE;
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
1086
1310
}
1087
1311
1088
1312
if(custom_argv != NULL){
1103
1327
ret = kill(p->pid, SIGTERM);
1104
1328
if(ret == -1 and errno != ESRCH){
1105
1329
/* Set-uid proccesses might not get closed */
1106
perror("kill");
1330
error(0, errno, "kill");
1107
1331
}
1108
1332
}
1109
1333
}
1110
1334
1111
1335
/* Wait for any remaining child processes to terminate */
1112
do{
1336
do {
1113
1337
ret = wait(NULL);
1114
1338
} while(ret >= 0);
1115
1339
if(errno != ECHILD){
1116
perror("wait");
1340
error(0, errno, "wait");
1117
1341
}
1118
1342
1119
1343
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0