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- Committer: Teddy Hogeborn
- Date: 2014-03-06 02:26:04 UTC
- 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 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 © 2008-2013 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 */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
67
75
68
76
#define BUFFER_SIZE 256
69
77
71
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
72
80
73
81
const char *argp_program_version = "plugin-runner " VERSION;
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
75
83
76
84
typedef struct plugin{
77
85
char *name; /* can be NULL or any plugin name */
80
88
char **environ;
81
89
int envc;
82
90
bool disabled;
83
91
84
92
/* Variables used for running processes*/
85
93
pid_t pid;
86
94
int fd;
88
96
size_t buffer_size;
89
97
size_t buffer_length;
90
98
bool eof;
91
volatile bool completed;
92
volatile int status;
99
volatile sig_atomic_t completed;
100
int status;
93
101
struct plugin *next;
94
102
} plugin;
95
103
98
106
/* Gets an existing plugin based on name,
99
107
or if none is found, creates a new one */
100
108
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))){
109
/* Check for existing plugin with that name */
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
111
if((p->name == name)
112
or (p->name and name and (strcmp(p->name, name) == 0))){
105
113
return p;
106
114
}
107
115
}
108
116
/* Create a new plugin */
109
plugin *new_plugin = malloc(sizeof(plugin));
110
if (new_plugin == NULL){
117
plugin *new_plugin = NULL;
118
do {
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
121
if(new_plugin == NULL){
111
122
return NULL;
112
123
}
113
124
char *copy_name = NULL;
114
125
if(name != NULL){
115
copy_name = strdup(name);
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
116
129
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
117
133
return NULL;
118
134
}
119
135
}
120
136
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
125
141
126
new_plugin->argv = malloc(sizeof(char *) * 2);
127
if (new_plugin->argv == NULL){
142
do {
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
145
if(new_plugin->argv == NULL){
146
int e = errno;
128
147
free(copy_name);
129
148
free(new_plugin);
149
errno = e;
130
150
return NULL;
131
151
}
132
152
new_plugin->argv[0] = copy_name;
133
153
new_plugin->argv[1] = NULL;
134
154
135
new_plugin->environ = malloc(sizeof(char *));
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
136
158
if(new_plugin->environ == NULL){
159
int e = errno;
137
160
free(copy_name);
138
161
free(new_plugin->argv);
139
162
free(new_plugin);
163
errno = e;
140
164
return NULL;
141
165
}
142
166
new_plugin->environ[0] = NULL;
147
171
}
148
172
149
173
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
150
175
static bool add_to_char_array(const char *new, char ***array,
151
176
int *len){
152
177
/* Resize the pointed-to array to hold one more pointer */
153
*array = realloc(*array, sizeof(char *)
154
* (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);
155
183
/* Malloc check */
156
if(*array == NULL){
184
if(new_array == NULL){
157
185
return false;
158
186
}
187
*array = new_array;
159
188
/* Make a copy of the new string */
160
char *copy = strdup(new);
189
char *copy;
190
do {
191
copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
161
193
if(copy == NULL){
162
194
return false;
163
195
}
170
202
}
171
203
172
204
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
173
206
static bool add_argument(plugin *p, const char *arg){
174
207
if(p == NULL){
175
208
return false;
178
211
}
179
212
180
213
/* Add to a plugin's environment */
214
__attribute__((nonnull(2)))
181
215
static bool add_environment(plugin *p, const char *def, bool replace){
182
216
if(p == NULL){
183
217
return false;
185
219
/* namelen = length of name of environment variable */
186
220
size_t namelen = (size_t)(strchrnul(def, '=') - def);
187
221
/* Search for this environment variable */
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
190
224
/* It already exists */
191
225
if(replace){
192
char *new = realloc(*e, strlen(def) + 1);
193
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){
194
231
return false;
195
232
}
196
*e = new;
197
strcpy(*e, def);
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
198
235
}
199
236
return true;
200
237
}
205
242
/*
206
243
* Based on the example in the GNU LibC manual chapter 13.13 "File
207
244
* Descriptor Flags".
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
245
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
209
246
*/
210
247
static int set_cloexec_flag(int fd){
211
int ret = fcntl(fd, F_GETFD, 0);
248
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
212
249
/* If reading the flags failed, return error indication now. */
213
250
if(ret < 0){
214
251
return ret;
215
252
}
216
253
/* Store modified flag word in the descriptor. */
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
254
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
255
ret | FD_CLOEXEC));
218
256
}
219
257
220
258
221
259
/* Mark processes as completed when they exit, and save their exit
222
260
status. */
223
261
static void handle_sigchld(__attribute__((unused)) int sig){
262
int old_errno = errno;
224
263
while(true){
225
264
plugin *proc = plugin_list;
226
265
int status;
230
269
break;
231
270
}
232
271
if(pid == -1){
233
if (errno != ECHILD){
234
perror("waitpid");
272
if(errno == ECHILD){
273
/* No child processes */
274
break;
235
275
}
236
/* No child processes */
237
break;
276
error(0, errno, "waitpid");
238
277
}
239
278
240
279
/* A child exited, find it in process_list */
246
285
continue;
247
286
}
248
287
proc->status = status;
249
proc->completed = true;
288
proc->completed = 1;
250
289
}
290
errno = old_errno;
251
291
}
252
292
253
293
/* Prints out a password to stdout */
294
__attribute__((nonnull))
254
295
static bool print_out_password(const char *buffer, size_t length){
255
296
ssize_t ret;
256
297
for(size_t written = 0; written < length; written += (size_t)ret){
264
305
}
265
306
266
307
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
267
309
static void free_plugin(plugin *plugin_node){
268
310
269
311
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
275
317
}
276
318
free(plugin_node->environ);
277
319
free(plugin_node->buffer);
278
320
279
321
/* Removes the plugin from the singly-linked list */
280
322
if(plugin_node == plugin_list){
281
323
/* First one - simple */
309
351
struct stat st;
310
352
fd_set rfds_all;
311
353
int ret, maxfd = 0;
354
ssize_t sret;
312
355
uid_t uid = 65534;
313
356
gid_t gid = 65534;
314
357
bool debug = false;
323
366
sigemptyset(&sigchld_action.sa_mask);
324
367
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
325
368
if(ret == -1){
326
perror("sigaddset");
327
exitstatus = EXIT_FAILURE;
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
328
371
goto fallback;
329
372
}
330
373
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
331
374
if(ret == -1){
332
perror("sigaction");
333
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
334
377
goto fallback;
335
378
}
336
379
368
411
.doc = "Group ID the plugins will run as", .group = 3 },
369
412
{ .name = "debug", .key = 132,
370
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 },
371
423
{ .name = NULL }
372
424
};
373
425
374
error_t parse_opt (int key, char *arg, __attribute__((unused))
375
struct argp_state *state) {
376
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;
377
432
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;
433
{
434
char *plugin_option;
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
437
break;
387
438
}
388
439
}
389
440
}
390
441
break;
391
442
case 'G': /* --global-env */
392
if(arg == NULL){
393
break;
394
}
395
if(not add_environment(getplugin(NULL), arg, true)){
396
perror("add_environment");
397
}
443
add_environment(getplugin(NULL), arg, true);
398
444
break;
399
445
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;
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;
417
464
}
418
465
}
419
466
}
420
467
break;
421
468
case 'E': /* --env-for */
422
if(arg == NULL){
423
break;
424
}
425
469
{
426
470
char *envdef = strchr(arg, ':');
427
471
if(envdef == NULL){
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
428
474
break;
429
475
}
430
476
*envdef = '\0';
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
477
envdef++;
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
433
482
}
483
add_environment(getplugin(arg), envdef, true);
434
484
}
435
485
break;
436
486
case 'd': /* --disable */
437
if (arg != NULL){
487
{
438
488
plugin *p = getplugin(arg);
439
if(p == NULL){
440
return ARGP_ERR_UNKNOWN;
489
if(p != NULL){
490
p->disabled = true;
441
491
}
442
p->disabled = true;
443
492
}
444
493
break;
445
494
case 'e': /* --enable */
446
if (arg != NULL){
495
{
447
496
plugin *p = getplugin(arg);
448
if(p == NULL){
449
return ARGP_ERR_UNKNOWN;
497
if(p != NULL){
498
p->disabled = false;
450
499
}
451
p->disabled = false;
452
500
}
453
501
break;
454
502
case 128: /* --plugin-dir */
455
503
free(plugindir);
456
504
plugindir = strdup(arg);
457
if(plugindir == NULL){
458
perror("strdup");
459
}
460
505
break;
461
506
case 129: /* --config-file */
462
507
/* This is already done by parse_opt_config_file() */
463
508
break;
464
509
case 130: /* --userid */
465
uid = (uid_t)strtol(arg, NULL, 10);
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;
516
}
517
uid = (uid_t)tmp_id;
466
518
break;
467
519
case 131: /* --groupid */
468
gid = (gid_t)strtol(arg, NULL, 10);
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;
526
}
527
gid = (gid_t)tmp_id;
469
528
break;
470
529
case 132: /* --debug */
471
530
debug = true;
472
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;
546
/*
547
* When adding more options before this line, remember to also add a
548
* "case" to the "parse_opt_config_file" function below.
549
*/
473
550
case ARGP_KEY_ARG:
474
551
/* Cryptsetup always passes an argument, which is an empty
475
552
string if "none" was specified in /etc/crypttab. So if
476
553
argument was empty, we ignore it silently. */
477
if(arg[0] != '\0'){
478
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
554
if(arg[0] == '\0'){
555
break;
479
556
}
480
break;
481
case ARGP_KEY_END:
482
break;
483
557
default:
484
558
return ARGP_ERR_UNKNOWN;
485
559
}
486
return 0;
560
return errno; /* Set to 0 at start */
487
561
}
488
562
489
563
/* This option parser is the same as parse_opt() above, except it
490
564
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) {
565
error_t parse_opt_config_file(int key, char *arg,
566
__attribute__((unused))
567
struct argp_state *state){
568
errno = 0;
569
switch(key){
495
570
case 'g': /* --global-options */
496
571
case 'G': /* --global-env */
497
572
case 'o': /* --options-for */
503
578
case 129: /* --config-file */
504
579
free(argfile);
505
580
argfile = strdup(arg);
506
if(argfile == NULL){
507
perror("strdup");
508
}
509
break;
581
break;
510
582
case 130: /* --userid */
511
583
case 131: /* --groupid */
512
584
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
513
588
case ARGP_KEY_ARG:
514
case ARGP_KEY_END:
515
589
break;
516
590
default:
517
591
return ARGP_ERR_UNKNOWN;
518
592
}
519
return 0;
593
return errno;
520
594
}
521
595
522
596
struct argp argp = { .options = options,
524
598
.args_doc = "",
525
599
.doc = "Mandos plugin runner -- Run plugins" };
526
600
527
/* Parse using the parse_opt_config_file in order to get the custom
601
/* Parse using parse_opt_config_file() in order to get the custom
528
602
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;
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;
533
617
goto fallback;
534
618
}
535
619
537
621
argp.parser = parse_opt;
538
622
539
623
/* Open the configfile if available */
540
if (argfile == NULL){
624
if(argfile == NULL){
541
625
conffp = fopen(AFILE, "r");
542
626
} else {
543
627
conffp = fopen(argfile, "r");
544
}
628
}
545
629
if(conffp != NULL){
546
630
char *org_line = NULL;
547
631
char *p, *arg, *new_arg, *line;
548
632
size_t size = 0;
549
ssize_t sret;
550
633
const char whitespace_delims[] = " \r\t\f\v\n";
551
634
const char comment_delim[] = "#";
552
635
553
636
custom_argc = 1;
554
637
custom_argv = malloc(sizeof(char*) * 2);
555
638
if(custom_argv == NULL){
556
perror("malloc");
557
exitstatus = EXIT_FAILURE;
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
558
641
goto fallback;
559
642
}
560
643
custom_argv[0] = argv[0];
561
644
custom_argv[1] = NULL;
562
645
563
646
/* for each line in the config file, strip whitespace and ignore
564
647
commented text */
565
648
while(true){
567
650
if(sret == -1){
568
651
break;
569
652
}
570
653
571
654
line = org_line;
572
655
arg = strsep(&line, comment_delim);
573
656
while((p = strsep(&arg, whitespace_delims)) != NULL){
576
659
}
577
660
new_arg = strdup(p);
578
661
if(new_arg == NULL){
579
perror("strdup");
580
exitstatus = EXIT_FAILURE;
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
581
664
free(org_line);
582
665
goto fallback;
583
666
}
584
667
585
668
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;
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
}
593
682
}
594
683
custom_argv[custom_argc-1] = new_arg;
595
custom_argv[custom_argc] = NULL;
684
custom_argv[custom_argc] = NULL;
596
685
}
597
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
}
598
695
free(org_line);
599
696
} else {
600
697
/* Check for harmful errors and go to fallback. Other errors might
601
698
not affect opening plugins */
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
603
perror("fopen");
604
exitstatus = EXIT_FAILURE;
699
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
605
702
goto fallback;
606
703
}
607
704
}
608
/* If there was any arguments from configuration file,
609
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 */
610
707
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;
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;
616
722
goto fallback;
617
723
}
618
724
}
619
725
620
726
/* Parse actual command line arguments, to let them override the
621
727
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;
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;
626
742
goto fallback;
627
743
}
628
744
633
749
for(char **a = p->argv; *a != NULL; a++){
634
750
fprintf(stderr, "\tArg: %s\n", *a);
635
751
}
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
752
fprintf(stderr, "...and %d environment variables\n", p->envc);
637
753
for(char **a = p->environ; *a != NULL; a++){
638
754
fprintf(stderr, "\t%s\n", *a);
639
755
}
640
756
}
641
757
}
642
758
643
/* 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
}
644
786
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 */
787
if(ret == -1){
788
error(0, errno, "setuid");
789
}
790
791
/* Open plugin directory with close_on_exec flag */
666
792
{
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
}
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;
675
834
}
676
835
}
677
836
679
838
680
839
/* Read and execute any executable in the plugin directory*/
681
840
while(true){
682
dirst = readdir(dir);
841
do {
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
683
844
684
845
/* All directory entries have been processed */
685
846
if(dirst == NULL){
686
if (errno == EBADF){
687
perror("readdir");
688
exitstatus = EXIT_FAILURE;
847
if(errno == EBADF){
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
689
850
goto fallback;
690
851
}
691
852
break;
697
858
{
698
859
bool bad_name = false;
699
860
700
const char const *bad_prefixes[] = { ".", "#", NULL };
861
const char * const bad_prefixes[] = { ".", "#", NULL };
701
862
702
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
703
864
".dpkg-old",
704
865
".dpkg-bak",
705
866
".dpkg-divert", NULL };
706
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
707
876
size_t pre_len = strlen(*pre);
708
877
if((d_name_len >= pre_len)
709
878
and strncmp((dirst->d_name), *pre, pre_len) == 0){
718
887
if(bad_name){
719
888
continue;
720
889
}
721
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
722
899
size_t suf_len = strlen(*suf);
723
900
if((d_name_len >= suf_len)
724
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
725
902
== 0)){
726
903
if(debug){
727
904
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
736
913
continue;
737
914
}
738
915
}
739
916
740
917
char *filename;
741
918
if(plugindir == NULL){
742
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
919
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
920
dirst->d_name));
743
921
} else {
744
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));
745
925
}
746
926
if(ret < 0){
747
perror("asprintf");
927
error(0, errno, "asprintf");
748
928
continue;
749
929
}
750
930
751
ret = stat(filename, &st);
752
if (ret == -1){
753
perror("stat");
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
932
if(ret == -1){
933
error(0, errno, "stat");
754
934
free(filename);
755
935
continue;
756
936
}
757
937
758
938
/* Ignore non-executable files */
759
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)){
760
941
if(debug){
761
942
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
762
943
" with bad type or mode\n", filename);
767
948
768
949
plugin *p = getplugin(dirst->d_name);
769
950
if(p == NULL){
770
perror("getplugin");
951
error(0, errno, "getplugin");
771
952
free(filename);
772
953
continue;
773
954
}
785
966
if(g != NULL){
786
967
for(char **a = g->argv + 1; *a != NULL; a++){
787
968
if(not add_argument(p, *a)){
788
perror("add_argument");
969
error(0, errno, "add_argument");
789
970
}
790
971
}
791
972
/* Add global environment variables */
792
973
for(char **e = g->environ; *e != NULL; e++){
793
974
if(not add_environment(p, *e, false)){
794
perror("add_environment");
975
error(0, errno, "add_environment");
795
976
}
796
977
}
797
978
}
802
983
if(p->environ[0] != NULL){
803
984
for(char **e = environ; *e != NULL; e++){
804
985
if(not add_environment(p, *e, false)){
805
perror("add_environment");
986
error(0, errno, "add_environment");
806
987
}
807
988
}
808
989
}
809
990
810
991
int pipefd[2];
811
ret = pipe(pipefd);
812
if (ret == -1){
813
perror("pipe");
814
exitstatus = EXIT_FAILURE;
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
if(ret == -1){
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
815
996
goto fallback;
816
997
}
817
998
/* Ask OS to automatic close the pipe on exec */
818
999
ret = set_cloexec_flag(pipefd[0]);
819
1000
if(ret < 0){
820
perror("set_cloexec_flag");
821
exitstatus = EXIT_FAILURE;
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
822
1003
goto fallback;
823
1004
}
824
1005
ret = set_cloexec_flag(pipefd[1]);
825
1006
if(ret < 0){
826
perror("set_cloexec_flag");
827
exitstatus = EXIT_FAILURE;
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
828
1009
goto fallback;
829
1010
}
830
1011
/* Block SIGCHLD until process is safely in process list */
831
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));
832
1015
if(ret < 0){
833
perror("sigprocmask");
834
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
835
1018
goto fallback;
836
1019
}
837
1020
/* Starting a new process to be watched */
838
pid_t pid = fork();
1021
pid_t pid;
1022
do {
1023
pid = fork();
1024
} while(pid == -1 and errno == EINTR);
839
1025
if(pid == -1){
840
perror("fork");
841
exitstatus = EXIT_FAILURE;
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
842
1028
goto fallback;
843
1029
}
844
1030
if(pid == 0){
845
1031
/* this is the child process */
846
1032
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
847
1033
if(ret < 0){
848
perror("sigaction");
849
_exit(EXIT_FAILURE);
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
850
1036
}
851
1037
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
852
1038
if(ret < 0){
853
perror("sigprocmask");
854
_exit(EXIT_FAILURE);
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
855
1041
}
856
1042
857
1043
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
858
1044
if(ret == -1){
859
perror("dup2");
860
_exit(EXIT_FAILURE);
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
861
1047
}
862
1048
863
1049
if(dirfd(dir) < 0){
867
1053
}
868
1054
if(p->environ[0] == NULL){
869
1055
if(execv(filename, p->argv) < 0){
870
perror("execv");
871
_exit(EXIT_FAILURE);
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
872
1058
}
873
1059
} else {
874
1060
if(execve(filename, p->argv, p->environ) < 0){
875
perror("execve");
876
_exit(EXIT_FAILURE);
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
877
1063
}
878
1064
}
879
1065
/* no return */
880
1066
}
881
1067
/* Parent process */
882
close(pipefd[1]); /* Close unused write end of pipe */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1069
pipe */
883
1070
free(filename);
884
1071
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);
1072
if(new_plugin == NULL){
1073
error(0, errno, "getplugin");
1074
ret = (int)(TEMP_FAILURE_RETRY
1075
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1076
NULL)));
888
1077
if(ret < 0){
889
perror("sigprocmask");
1078
error(0, errno, "sigprocmask");
890
1079
}
891
exitstatus = EXIT_FAILURE;
1080
exitstatus = EX_OSERR;
892
1081
goto fallback;
893
1082
}
894
1083
897
1086
898
1087
/* Unblock SIGCHLD so signal handler can be run if this process
899
1088
has already completed */
900
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));
901
1092
if(ret < 0){
902
perror("sigprocmask");
903
exitstatus = EXIT_FAILURE;
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
904
1095
goto fallback;
905
1096
}
906
1097
907
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
908
1112
909
if (maxfd < new_plugin->fd){
1113
if(maxfd < new_plugin->fd){
910
1114
maxfd = new_plugin->fd;
911
1115
}
912
1116
}
913
1117
914
closedir(dir);
1118
TEMP_FAILURE_RETRY(closedir(dir));
915
1119
dir = NULL;
1120
free_plugin(getplugin(NULL));
916
1121
917
1122
for(plugin *p = plugin_list; p != NULL; p = p->next){
918
1123
if(p->pid != 0){
929
1134
while(plugin_list){
930
1135
fd_set rfds = rfds_all;
931
1136
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
932
if (select_ret == -1){
933
perror("select");
934
exitstatus = EXIT_FAILURE;
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
935
1140
goto fallback;
936
1141
}
937
1142
/* OK, now either a process completed, or something can be read
938
1143
from one of them */
939
1144
for(plugin *proc = plugin_list; proc != NULL;){
940
1145
/* Is this process completely done? */
941
if(proc->eof and proc->completed){
1146
if(proc->completed and proc->eof){
942
1147
/* Only accept the plugin output if it exited cleanly */
943
1148
if(not WIFEXITED(proc->status)
944
1149
or WEXITSTATUS(proc->status) != 0){
945
1150
/* Bad exit by plugin */
946
1151
947
1152
if(debug){
948
1153
if(WIFEXITED(proc->status)){
949
fprintf(stderr, "Plugin %u exited with status %d\n",
950
(unsigned int) (proc->pid),
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
951
1157
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));
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)));
956
1164
} else if(WCOREDUMP(proc->status)){
957
fprintf(stderr, "Plugin %d dumped core\n",
958
(unsigned int) (proc->pid));
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
959
1167
}
960
1168
}
961
1169
962
1170
/* Remove the plugin */
963
FD_CLR(proc->fd, &rfds_all);
964
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
965
1186
/* Block signal while modifying process_list */
966
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));
967
1191
if(ret < 0){
968
perror("sigprocmask");
969
exitstatus = EXIT_FAILURE;
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
970
1194
goto fallback;
971
1195
}
972
1196
975
1199
proc = next_plugin;
976
1200
977
1201
/* We are done modifying process list, so unblock signal */
978
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
979
NULL);
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
980
1205
if(ret < 0){
981
perror("sigprocmask");
982
exitstatus = EXIT_FAILURE;
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
983
1208
goto fallback;
984
1209
}
985
1210
995
1220
bool bret = print_out_password(proc->buffer,
996
1221
proc->buffer_length);
997
1222
if(not bret){
998
perror("print_out_password");
999
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
1000
1225
}
1001
1226
goto fallback;
1002
1227
}
1003
1228
1004
1229
/* This process has not completed. Does it have any output? */
1005
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
1006
1247
/* This process had nothing to say at this time */
1007
1248
proc = proc->next;
1008
1249
continue;
1009
1250
}
1010
1251
/* Before reading, make the process' data buffer large enough */
1011
1252
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;
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;
1017
1258
goto fallback;
1018
1259
}
1260
proc->buffer = new_buffer;
1019
1261
proc->buffer_size += BUFFER_SIZE;
1020
1262
}
1021
1263
/* Read from the process */
1022
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1023
BUFFER_SIZE);
1024
if(ret < 0){
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1265
proc->buffer
1266
+ proc->buffer_length,
1267
BUFFER_SIZE));
1268
if(sret < 0){
1025
1269
/* Read error from this process; ignore the error */
1026
1270
proc = proc->next;
1027
1271
continue;
1028
1272
}
1029
if(ret == 0){
1273
if(sret == 0){
1030
1274
/* got EOF */
1031
1275
proc->eof = true;
1032
1276
} else {
1033
proc->buffer_length += (size_t) ret;
1277
proc->buffer_length += (size_t) sret;
1034
1278
}
1035
1279
}
1036
1280
}
1037
1038
1281
1282
1039
1283
fallback:
1040
1284
1041
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
1042
1287
/* Fallback if all plugins failed, none are found or an error
1043
1288
occured */
1044
1289
bool bret;
1052
1297
}
1053
1298
bret = print_out_password(passwordbuffer, len);
1054
1299
if(not bret){
1055
perror("print_out_password");
1056
exitstatus = EXIT_FAILURE;
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
1057
1302
}
1058
1303
}
1059
1304
1060
1305
/* Restore old signal handler */
1061
1306
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1062
1307
if(ret == -1){
1063
perror("sigaction");
1064
exitstatus = EXIT_FAILURE;
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
1065
1310
}
1066
1311
1067
1312
if(custom_argv != NULL){
1082
1327
ret = kill(p->pid, SIGTERM);
1083
1328
if(ret == -1 and errno != ESRCH){
1084
1329
/* Set-uid proccesses might not get closed */
1085
perror("kill");
1330
error(0, errno, "kill");
1086
1331
}
1087
1332
}
1088
1333
}
1089
1334
1090
1335
/* Wait for any remaining child processes to terminate */
1091
do{
1336
do {
1092
1337
ret = wait(NULL);
1093
1338
} while(ret >= 0);
1094
1339
if(errno != ECHILD){
1095
perror("wait");
1340
error(0, errno, "wait");
1096
1341
}
1097
1342
1098
1343
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0