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- Committer: Teddy Hogeborn
- Date: 2008-09-03 17:34:29 UTC
- Revision ID: teddy@fukt.bsnet.se-20080903173429-db2mjtddf7mgbx8z
* plugins.d/password-request.xml (OVERVIEW): Refer to
password-prompt(8) by
name.
(SECURITY): Improved wording. Add paragraph about insecurity of
ping.
(SEE ALSO): Add references to cryptsetup(8) and crypttab(5).
Changed to be a <variablelist> and added text.
password-prompt(8) by
name.
(SECURITY): Improved wording. Add paragraph about insecurity of
ping.
(SEE ALSO): Add references to cryptsetup(8) and crypttab(5).
Changed to be a <variablelist> and added text.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 Björn Påhlsson
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
8
7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
19
18
* along with this program. If not, see
20
19
* <http://www.gnu.org/licenses/>.
21
20
*
22
* Contact the authors at <mandos@recompile.se>.
21
* Contact the authors at <mandos@fukt.bsnet.se>.
23
22
*/
24
23
25
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
25
asprintf() */
27
26
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
30
29
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
33
stat, waitpid(), WIFEXITED(),
35
34
WEXITSTATUS(), wait(), pid_t,
36
35
uid_t, gid_t, getuid(), getgid(),
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
40
WEXITSTATUS() */
43
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
42
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
44
readdir(), closedir(), dirfd() */
47
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
46
fcntl(), setuid(), setgid(),
49
47
F_GETFD, F_SETFD, FD_CLOEXEC,
50
48
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
49
dup2, STDOUT_FILENO, _exit(),
52
50
execv(), write(), read(),
53
51
close() */
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
53
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
58
55
#include <errno.h> /* errno */
59
56
#include <argp.h> /* struct argp_option, struct
60
57
argp_state, struct argp,
64
61
#include <signal.h> /* struct sigaction, sigemptyset(),
65
62
sigaddset(), sigaction(),
66
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
64
SIG_UNBLOCK, kill() */
69
65
#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
66
76
67
#define BUFFER_SIZE 256
77
68
78
69
#define PDIR "/lib/mandos/plugins.d"
79
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
71
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
75
struct plugin;
83
76
84
77
typedef struct plugin{
85
78
char *name; /* can be NULL or any plugin name */
88
81
char **environ;
89
82
int envc;
90
83
bool disabled;
91
84
92
85
/* Variables used for running processes*/
93
86
pid_t pid;
94
87
int fd;
96
89
size_t buffer_size;
97
90
size_t buffer_length;
98
91
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
92
volatile bool completed;
93
volatile int status;
101
94
struct plugin *next;
102
95
} plugin;
103
96
104
97
static plugin *plugin_list = NULL;
105
98
106
/* Gets an existing plugin based on name,
99
/* Gets a existing plugin based on name,
107
100
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
101
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
111
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
if((p->name == name)
113
or (p->name and name and (strcmp(p->name, name) == 0))){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
104
if ((p->name == name)
105
or (p->name and name and (strcmp(p->name, name) == 0))){
114
106
return p;
115
107
}
116
108
}
117
109
/* Create a new plugin */
118
plugin *new_plugin = NULL;
119
do {
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
122
if(new_plugin == NULL){
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
123
112
return NULL;
124
113
}
125
114
char *copy_name = NULL;
126
115
if(name != NULL){
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
116
copy_name = strdup(name);
130
117
if(copy_name == NULL){
131
int e = errno;
132
free(new_plugin);
133
errno = e;
134
118
return NULL;
135
119
}
136
120
}
137
138
*new_plugin = (plugin){ .name = copy_name,
139
.argc = 1,
140
.disabled = false,
141
.next = plugin_list };
142
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
146
if(new_plugin->argv == NULL){
147
int e = errno;
121
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
126
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
148
129
free(copy_name);
149
130
free(new_plugin);
150
errno = e;
151
131
return NULL;
152
132
}
153
133
new_plugin->argv[0] = copy_name;
154
134
new_plugin->argv[1] = NULL;
155
135
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
136
new_plugin->environ = malloc(sizeof(char *));
159
137
if(new_plugin->environ == NULL){
160
int e = errno;
161
138
free(copy_name);
162
139
free(new_plugin->argv);
163
140
free(new_plugin);
164
errno = e;
165
141
return NULL;
166
142
}
167
143
new_plugin->environ[0] = NULL;
172
148
}
173
149
174
150
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
151
static bool add_to_char_array(const char *new, char ***array,
177
152
int *len){
178
153
/* Resize the pointed-to array to hold one more pointer */
179
char **new_array = NULL;
180
do {
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} while(new_array == NULL and errno == EINTR);
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
184
156
/* Malloc check */
185
if(new_array == NULL){
157
if(*array == NULL){
186
158
return false;
187
159
}
188
*array = new_array;
189
160
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
161
char *copy = strdup(new);
194
162
if(copy == NULL){
195
163
return false;
196
164
}
203
171
}
204
172
205
173
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
174
static bool add_argument(plugin *p, const char *arg){
208
175
if(p == NULL){
209
176
return false;
212
179
}
213
180
214
181
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
182
static bool add_environment(plugin *p, const char *def, bool replace){
217
183
if(p == NULL){
218
184
return false;
220
186
/* namelen = length of name of environment variable */
221
187
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
188
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen+1) == 0){
225
191
/* It already exists */
226
192
if(replace){
227
char *new_envdef;
228
do {
229
new_envdef = realloc(*envdef, strlen(def) + 1);
230
} while(new_envdef == NULL and errno == EINTR);
231
if(new_envdef == NULL){
193
char *new = realloc(*e, strlen(def));
194
if(new == NULL){
232
195
return false;
233
196
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
197
*e = new;
198
strcpy(*e, def);
236
199
}
237
200
return true;
238
201
}
243
206
/*
244
207
* Based on the example in the GNU LibC manual chapter 13.13 "File
245
208
* Descriptor Flags".
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
247
210
*/
248
__attribute__((warn_unused_result))
249
static int set_cloexec_flag(int fd){
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
static int set_cloexec_flag(int fd)
212
{
213
int ret = fcntl(fd, F_GETFD, 0);
251
214
/* If reading the flags failed, return error indication now. */
252
215
if(ret < 0){
253
216
return ret;
254
217
}
255
218
/* Store modified flag word in the descriptor. */
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
257
ret | FD_CLOEXEC));
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
220
}
259
221
260
222
261
223
/* Mark processes as completed when they exit, and save their exit
262
224
status. */
263
static void handle_sigchld(__attribute__((unused)) int sig){
264
int old_errno = errno;
225
void handle_sigchld(__attribute__((unused)) int sig){
265
226
while(true){
266
227
plugin *proc = plugin_list;
267
228
int status;
271
232
break;
272
233
}
273
234
if(pid == -1){
274
if(errno == ECHILD){
275
/* No child processes */
276
break;
235
if (errno != ECHILD){
236
perror("waitpid");
277
237
}
278
error(0, errno, "waitpid");
238
/* No child processes */
239
break;
279
240
}
280
241
281
242
/* A child exited, find it in process_list */
282
243
while(proc != NULL and proc->pid != pid){
283
244
proc = proc->next;
287
248
continue;
288
249
}
289
250
proc->status = status;
290
proc->completed = 1;
251
proc->completed = true;
291
252
}
292
errno = old_errno;
293
253
}
294
254
295
255
/* Prints out a password to stdout */
296
__attribute__((nonnull, warn_unused_result))
297
static bool print_out_password(const char *buffer, size_t length){
256
bool print_out_password(const char *buffer, size_t length){
298
257
ssize_t ret;
258
if(length>0 and buffer[length-1] == '\n'){
259
length--;
260
}
299
261
for(size_t written = 0; written < length; written += (size_t)ret){
300
262
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
301
263
length - written));
307
269
}
308
270
309
271
/* Removes and free a plugin from the plugin list */
310
__attribute__((nonnull))
311
272
static void free_plugin(plugin *plugin_node){
312
273
313
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
319
280
}
320
281
free(plugin_node->environ);
321
282
free(plugin_node->buffer);
322
283
323
284
/* Removes the plugin from the singly-linked list */
324
285
if(plugin_node == plugin_list){
325
286
/* First one - simple */
353
314
struct stat st;
354
315
fd_set rfds_all;
355
316
int ret, maxfd = 0;
356
ssize_t sret;
357
317
uid_t uid = 65534;
358
318
gid_t gid = 65534;
359
319
bool debug = false;
368
328
sigemptyset(&sigchld_action.sa_mask);
369
329
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
370
330
if(ret == -1){
371
error(0, errno, "sigaddset");
372
exitstatus = EX_OSERR;
331
perror("sigaddset");
332
exitstatus = EXIT_FAILURE;
373
333
goto fallback;
374
334
}
375
335
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
376
336
if(ret == -1){
377
error(0, errno, "sigaction");
378
exitstatus = EX_OSERR;
337
perror("sigaction");
338
exitstatus = EXIT_FAILURE;
379
339
goto fallback;
380
340
}
381
341
413
373
.doc = "Group ID the plugins will run as", .group = 3 },
414
374
{ .name = "debug", .key = 132,
415
375
.doc = "Debug mode", .group = 4 },
416
/*
417
* These reproduce what we would get without ARGP_NO_HELP
418
*/
419
{ .name = "help", .key = '?',
420
.doc = "Give this help list", .group = -1 },
421
{ .name = "usage", .key = -3,
422
.doc = "Give a short usage message", .group = -1 },
423
{ .name = "version", .key = 'V',
424
.doc = "Print program version", .group = -1 },
425
376
{ .name = NULL }
426
377
};
427
378
428
__attribute__((nonnull(3)))
429
error_t parse_opt(int key, char *arg, struct argp_state *state){
430
errno = 0;
431
switch(key){
432
char *tmp;
433
intmax_t tmp_id;
379
error_t parse_opt (int key, char *arg, __attribute__((unused))
380
struct argp_state *state) {
381
switch (key) {
434
382
case 'g': /* --global-options */
435
{
436
char *plugin_option;
437
while((plugin_option = strsep(&arg, ",")) != NULL){
438
if(not add_argument(getplugin(NULL), plugin_option)){
439
break;
383
if (arg != NULL){
384
char *p;
385
while((p = strsep(&arg, ",")) != NULL){
386
if(p[0] == '\0'){
387
continue;
388
}
389
if(not add_argument(getplugin(NULL), p)){
390
perror("add_argument");
391
return ARGP_ERR_UNKNOWN;
440
392
}
441
393
}
442
errno = 0;
443
394
}
444
395
break;
445
396
case 'G': /* --global-env */
446
if(add_environment(getplugin(NULL), arg, true)){
447
errno = 0;
397
if(arg == NULL){
398
break;
399
}
400
{
401
char *envdef = strdup(arg);
402
if(envdef == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), envdef, true)){
406
perror("add_environment");
407
}
448
408
}
449
409
break;
450
410
case 'o': /* --options-for */
451
{
452
char *option_list = strchr(arg, ':');
453
if(option_list == NULL){
454
argp_error(state, "No colon in \"%s\"", arg);
455
errno = EINVAL;
456
break;
457
}
458
*option_list = '\0';
459
option_list++;
460
if(arg[0] == '\0'){
461
argp_error(state, "Empty plugin name");
462
errno = EINVAL;
463
break;
464
}
465
char *option;
466
while((option = strsep(&option_list, ",")) != NULL){
467
if(not add_argument(getplugin(arg), option)){
468
break;
411
if (arg != NULL){
412
char *p_name = strsep(&arg, ":");
413
if(p_name[0] == '\0'){
414
break;
415
}
416
char *opt = strsep(&arg, ":");
417
if(opt[0] == '\0'){
418
break;
419
}
420
if(opt != NULL){
421
char *p;
422
while((p = strsep(&opt, ",")) != NULL){
423
if(p[0] == '\0'){
424
continue;
425
}
426
if(not add_argument(getplugin(p_name), p)){
427
perror("add_argument");
428
return ARGP_ERR_UNKNOWN;
429
}
469
430
}
470
431
}
471
errno = 0;
472
432
}
473
433
break;
474
434
case 'E': /* --env-for */
435
if(arg == NULL){
436
break;
437
}
475
438
{
476
439
char *envdef = strchr(arg, ':');
477
440
if(envdef == NULL){
478
argp_error(state, "No colon in \"%s\"", arg);
479
errno = EINVAL;
480
break;
481
}
482
*envdef = '\0';
441
break;
442
}
443
char *p_name = strndup(arg, (size_t) (envdef-arg));
444
if(p_name == NULL){
445
break;
446
}
483
447
envdef++;
484
if(arg[0] == '\0'){
485
argp_error(state, "Empty plugin name");
486
errno = EINVAL;
487
break;
488
}
489
if(add_environment(getplugin(arg), envdef, true)){
490
errno = 0;
448
if(not add_environment(getplugin(p_name), envdef, true)){
449
perror("add_environment");
491
450
}
492
451
}
493
452
break;
494
453
case 'd': /* --disable */
495
{
454
if (arg != NULL){
496
455
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = true;
499
errno = 0;
456
if(p == NULL){
457
return ARGP_ERR_UNKNOWN;
500
458
}
459
p->disabled = true;
501
460
}
502
461
break;
503
462
case 'e': /* --enable */
504
{
463
if (arg != NULL){
505
464
plugin *p = getplugin(arg);
506
if(p != NULL){
507
p->disabled = false;
508
errno = 0;
465
if(p == NULL){
466
return ARGP_ERR_UNKNOWN;
509
467
}
468
p->disabled = false;
510
469
}
511
470
break;
512
471
case 128: /* --plugin-dir */
513
free(plugindir);
514
472
plugindir = strdup(arg);
515
if(plugindir != NULL){
516
errno = 0;
517
}
473
if(plugindir == NULL){
474
perror("strdup");
475
}
518
476
break;
519
477
case 129: /* --config-file */
520
478
/* This is already done by parse_opt_config_file() */
521
479
break;
522
480
case 130: /* --userid */
523
tmp_id = strtoimax(arg, &tmp, 10);
524
if(errno != 0 or tmp == arg or *tmp != '\0'
525
or tmp_id != (uid_t)tmp_id){
526
argp_error(state, "Bad user ID number: \"%s\", using %"
527
PRIdMAX, arg, (intmax_t)uid);
528
break;
529
}
530
uid = (uid_t)tmp_id;
531
errno = 0;
481
uid = (uid_t)strtol(arg, NULL, 10);
532
482
break;
533
483
case 131: /* --groupid */
534
tmp_id = strtoimax(arg, &tmp, 10);
535
if(errno != 0 or tmp == arg or *tmp != '\0'
536
or tmp_id != (gid_t)tmp_id){
537
argp_error(state, "Bad group ID number: \"%s\", using %"
538
PRIdMAX, arg, (intmax_t)gid);
539
break;
540
}
541
gid = (gid_t)tmp_id;
542
errno = 0;
484
gid = (gid_t)strtol(arg, NULL, 10);
543
485
break;
544
486
case 132: /* --debug */
545
487
debug = true;
546
488
break;
547
/*
548
* These reproduce what we would get without ARGP_NO_HELP
549
*/
550
case '?': /* --help */
551
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
552
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
553
case -3: /* --usage */
554
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
555
argp_state_help(state, state->out_stream,
556
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
557
case 'V': /* --version */
558
fprintf(state->out_stream, "%s\n", argp_program_version);
559
exit(EXIT_SUCCESS);
560
break;
561
/*
562
* When adding more options before this line, remember to also add a
563
* "case" to the "parse_opt_config_file" function below.
564
*/
565
489
case ARGP_KEY_ARG:
566
/* Cryptsetup always passes an argument, which is an empty
567
string if "none" was specified in /etc/crypttab. So if
568
argument was empty, we ignore it silently. */
569
if(arg[0] == '\0'){
570
break;
571
}
490
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
491
break;
492
case ARGP_KEY_END:
493
break;
572
494
default:
573
495
return ARGP_ERR_UNKNOWN;
574
496
}
575
return errno; /* Set to 0 at start */
497
return 0;
576
498
}
577
499
578
500
/* This option parser is the same as parse_opt() above, except it
579
501
ignores everything but the --config-file option. */
580
error_t parse_opt_config_file(int key, char *arg,
581
__attribute__((unused))
582
struct argp_state *state){
583
errno = 0;
584
switch(key){
502
error_t parse_opt_config_file (int key, char *arg,
503
__attribute__((unused))
504
struct argp_state *state) {
505
switch (key) {
585
506
case 'g': /* --global-options */
586
507
case 'G': /* --global-env */
587
508
case 'o': /* --options-for */
591
512
case 128: /* --plugin-dir */
592
513
break;
593
514
case 129: /* --config-file */
594
free(argfile);
595
515
argfile = strdup(arg);
596
if(argfile != NULL){
597
errno = 0;
516
if(argfile == NULL){
517
perror("strdup");
598
518
}
599
break;
519
break;
600
520
case 130: /* --userid */
601
521
case 131: /* --groupid */
602
522
case 132: /* --debug */
603
case '?': /* --help */
604
case -3: /* --usage */
605
case 'V': /* --version */
606
523
case ARGP_KEY_ARG:
524
case ARGP_KEY_END:
607
525
break;
608
526
default:
609
527
return ARGP_ERR_UNKNOWN;
610
528
}
611
return errno;
529
return 0;
612
530
}
613
531
614
532
struct argp argp = { .options = options,
616
534
.args_doc = "",
617
535
.doc = "Mandos plugin runner -- Run plugins" };
618
536
619
/* Parse using parse_opt_config_file() in order to get the custom
537
/* Parse using the parse_opt_config_file in order to get the custom
620
538
config file location, if any. */
621
ret = argp_parse(&argp, argc, argv,
622
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
623
NULL, NULL);
624
switch(ret){
625
case 0:
626
break;
627
case ENOMEM:
628
default:
629
errno = ret;
630
error(0, errno, "argp_parse");
631
exitstatus = EX_OSERR;
632
goto fallback;
633
case EINVAL:
634
exitstatus = EX_USAGE;
539
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
540
if (ret == ARGP_ERR_UNKNOWN){
541
fprintf(stderr, "Unknown error while parsing arguments\n");
542
exitstatus = EXIT_FAILURE;
635
543
goto fallback;
636
544
}
637
545
639
547
argp.parser = parse_opt;
640
548
641
549
/* Open the configfile if available */
642
if(argfile == NULL){
550
if (argfile == NULL){
643
551
conffp = fopen(AFILE, "r");
644
552
} else {
645
553
conffp = fopen(argfile, "r");
646
}
554
}
647
555
if(conffp != NULL){
648
556
char *org_line = NULL;
649
557
char *p, *arg, *new_arg, *line;
650
558
size_t size = 0;
559
ssize_t sret;
651
560
const char whitespace_delims[] = " \r\t\f\v\n";
652
561
const char comment_delim[] = "#";
653
562
654
563
custom_argc = 1;
655
564
custom_argv = malloc(sizeof(char*) * 2);
656
565
if(custom_argv == NULL){
657
error(0, errno, "malloc");
658
exitstatus = EX_OSERR;
566
perror("malloc");
567
exitstatus = EXIT_FAILURE;
659
568
goto fallback;
660
569
}
661
570
custom_argv[0] = argv[0];
662
571
custom_argv[1] = NULL;
663
572
664
573
/* for each line in the config file, strip whitespace and ignore
665
574
commented text */
666
575
while(true){
668
577
if(sret == -1){
669
578
break;
670
579
}
671
580
672
581
line = org_line;
673
582
arg = strsep(&line, comment_delim);
674
583
while((p = strsep(&arg, whitespace_delims)) != NULL){
677
586
}
678
587
new_arg = strdup(p);
679
588
if(new_arg == NULL){
680
error(0, errno, "strdup");
681
exitstatus = EX_OSERR;
589
perror("strdup");
590
exitstatus = EXIT_FAILURE;
682
591
free(org_line);
683
592
goto fallback;
684
593
}
685
594
686
595
custom_argc += 1;
687
{
688
char **new_argv = realloc(custom_argv, sizeof(char *)
689
* ((unsigned int)
690
custom_argc + 1));
691
if(new_argv == NULL){
692
error(0, errno, "realloc");
693
exitstatus = EX_OSERR;
694
free(new_arg);
695
free(org_line);
696
goto fallback;
697
} else {
698
custom_argv = new_argv;
699
}
596
custom_argv = realloc(custom_argv, sizeof(char *)
597
* ((unsigned int) custom_argc + 1));
598
if(custom_argv == NULL){
599
perror("realloc");
600
exitstatus = EXIT_FAILURE;
601
free(org_line);
602
goto fallback;
700
603
}
701
604
custom_argv[custom_argc-1] = new_arg;
702
custom_argv[custom_argc] = NULL;
605
custom_argv[custom_argc] = NULL;
703
606
}
704
607
}
705
do {
706
ret = fclose(conffp);
707
} while(ret == EOF and errno == EINTR);
708
if(ret == EOF){
709
error(0, errno, "fclose");
710
exitstatus = EX_IOERR;
711
goto fallback;
712
}
713
608
free(org_line);
714
609
} else {
715
610
/* Check for harmful errors and go to fallback. Other errors might
716
611
not affect opening plugins */
717
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
612
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
613
perror("fopen");
614
exitstatus = EXIT_FAILURE;
720
615
goto fallback;
721
616
}
722
617
}
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
618
/* If there was any arguments from configuration file,
619
pass them to parser as command arguments */
725
620
if(custom_argv != NULL){
726
ret = argp_parse(&argp, custom_argc, custom_argv,
727
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
728
NULL, NULL);
729
switch(ret){
730
case 0:
731
break;
732
case ENOMEM:
733
default:
734
errno = ret;
735
error(0, errno, "argp_parse");
736
exitstatus = EX_OSERR;
737
goto fallback;
738
case EINVAL:
739
exitstatus = EX_CONFIG;
621
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
622
0, NULL);
623
if (ret == ARGP_ERR_UNKNOWN){
624
fprintf(stderr, "Unknown error while parsing arguments\n");
625
exitstatus = EXIT_FAILURE;
740
626
goto fallback;
741
627
}
742
628
}
743
629
744
630
/* Parse actual command line arguments, to let them override the
745
631
config file */
746
ret = argp_parse(&argp, argc, argv,
747
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
748
NULL, NULL);
749
switch(ret){
750
case 0:
751
break;
752
case ENOMEM:
753
default:
754
errno = ret;
755
error(0, errno, "argp_parse");
756
exitstatus = EX_OSERR;
757
goto fallback;
758
case EINVAL:
759
exitstatus = EX_USAGE;
632
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
633
if (ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
exitstatus = EXIT_FAILURE;
760
636
goto fallback;
761
637
}
762
638
767
643
for(char **a = p->argv; *a != NULL; a++){
768
644
fprintf(stderr, "\tArg: %s\n", *a);
769
645
}
770
fprintf(stderr, "...and %d environment variables\n", p->envc);
646
fprintf(stderr, "...and %u environment variables\n", p->envc);
771
647
for(char **a = p->environ; *a != NULL; a++){
772
648
fprintf(stderr, "\t%s\n", *a);
773
649
}
774
650
}
775
651
}
776
652
777
if(getuid() == 0){
778
/* Work around Debian bug #633582:
779
<http://bugs.debian.org/633582> */
780
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
781
if(plugindir_fd == -1){
782
error(0, errno, "open");
783
} else {
784
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
785
if(ret == -1){
786
error(0, errno, "fstat");
787
} else {
788
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
789
ret = fchown(plugindir_fd, uid, gid);
790
if(ret == -1){
791
error(0, errno, "fchown");
792
}
793
}
794
}
795
TEMP_FAILURE_RETRY(close(plugindir_fd));
796
}
797
}
798
799
/* Lower permissions */
800
ret = setgid(gid);
801
if(ret == -1){
802
error(0, errno, "setgid");
803
}
653
/* Strip permissions down to nobody */
804
654
ret = setuid(uid);
805
if(ret == -1){
806
error(0, errno, "setuid");
807
}
808
809
/* Open plugin directory with close_on_exec flag */
655
if (ret == -1){
656
perror("setuid");
657
}
658
setgid(gid);
659
if (ret == -1){
660
perror("setgid");
661
}
662
663
if (plugindir == NULL){
664
dir = opendir(PDIR);
665
} else {
666
dir = opendir(plugindir);
667
}
668
669
if(dir == NULL){
670
perror("Could not open plugin dir");
671
exitstatus = EXIT_FAILURE;
672
goto fallback;
673
}
674
675
/* Set the FD_CLOEXEC flag on the directory, if possible */
810
676
{
811
int dir_fd = -1;
812
if(plugindir == NULL){
813
dir_fd = open(PDIR, O_RDONLY |
814
#ifdef O_CLOEXEC
815
O_CLOEXEC
816
#else /* not O_CLOEXEC */
817
0
818
#endif /* not O_CLOEXEC */
819
);
820
} else {
821
dir_fd = open(plugindir, O_RDONLY |
822
#ifdef O_CLOEXEC
823
O_CLOEXEC
824
#else /* not O_CLOEXEC */
825
0
826
#endif /* not O_CLOEXEC */
827
);
828
}
829
if(dir_fd == -1){
830
error(0, errno, "Could not open plugin dir");
831
exitstatus = EX_UNAVAILABLE;
832
goto fallback;
833
}
834
835
#ifndef O_CLOEXEC
836
/* Set the FD_CLOEXEC flag on the directory */
837
ret = set_cloexec_flag(dir_fd);
838
if(ret < 0){
839
error(0, errno, "set_cloexec_flag");
840
TEMP_FAILURE_RETRY(close(dir_fd));
841
exitstatus = EX_OSERR;
842
goto fallback;
843
}
844
#endif /* O_CLOEXEC */
845
846
dir = fdopendir(dir_fd);
847
if(dir == NULL){
848
error(0, errno, "Could not open plugin dir");
849
TEMP_FAILURE_RETRY(close(dir_fd));
850
exitstatus = EX_OSERR;
851
goto fallback;
677
int dir_fd = dirfd(dir);
678
if(dir_fd >= 0){
679
ret = set_cloexec_flag(dir_fd);
680
if(ret < 0){
681
perror("set_cloexec_flag");
682
exitstatus = EXIT_FAILURE;
683
goto fallback;
684
}
852
685
}
853
686
}
854
687
856
689
857
690
/* Read and execute any executable in the plugin directory*/
858
691
while(true){
859
do {
860
dirst = readdir(dir);
861
} while(dirst == NULL and errno == EINTR);
692
dirst = readdir(dir);
862
693
863
694
/* All directory entries have been processed */
864
695
if(dirst == NULL){
865
if(errno == EBADF){
866
error(0, errno, "readdir");
867
exitstatus = EX_IOERR;
696
if (errno == EBADF){
697
perror("readdir");
698
exitstatus = EXIT_FAILURE;
868
699
goto fallback;
869
700
}
870
701
break;
876
707
{
877
708
bool bad_name = false;
878
709
879
const char * const bad_prefixes[] = { ".", "#", NULL };
710
const char const *bad_prefixes[] = { ".", "#", NULL };
880
711
881
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
712
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
882
713
".dpkg-old",
883
".dpkg-bak",
884
714
".dpkg-divert", NULL };
885
#ifdef __GNUC__
886
#pragma GCC diagnostic push
887
#pragma GCC diagnostic ignored "-Wcast-qual"
888
#endif
889
for(const char **pre = (const char **)bad_prefixes;
890
*pre != NULL; pre++){
891
#ifdef __GNUC__
892
#pragma GCC diagnostic pop
893
#endif
715
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
894
716
size_t pre_len = strlen(*pre);
895
717
if((d_name_len >= pre_len)
896
718
and strncmp((dirst->d_name), *pre, pre_len) == 0){
905
727
if(bad_name){
906
728
continue;
907
729
}
908
#ifdef __GNUC__
909
#pragma GCC diagnostic push
910
#pragma GCC diagnostic ignored "-Wcast-qual"
911
#endif
912
for(const char **suf = (const char **)bad_suffixes;
913
*suf != NULL; suf++){
914
#ifdef __GNUC__
915
#pragma GCC diagnostic pop
916
#endif
730
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
917
731
size_t suf_len = strlen(*suf);
918
732
if((d_name_len >= suf_len)
919
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
733
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
920
734
== 0)){
921
735
if(debug){
922
736
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
931
745
continue;
932
746
}
933
747
}
934
748
935
749
char *filename;
936
if(plugindir == NULL){
937
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
938
dirst->d_name));
939
} else {
940
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
941
plugindir,
942
dirst->d_name));
943
}
750
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
944
751
if(ret < 0){
945
error(0, errno, "asprintf");
752
perror("asprintf");
946
753
continue;
947
754
}
948
755
949
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
950
if(ret == -1){
951
error(0, errno, "stat");
756
ret = stat(filename, &st);
757
if (ret == -1){
758
perror("stat");
952
759
free(filename);
953
760
continue;
954
761
}
955
762
956
763
/* Ignore non-executable files */
957
if(not S_ISREG(st.st_mode)
958
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
764
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
959
765
if(debug){
960
766
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
961
767
" with bad type or mode\n", filename);
966
772
967
773
plugin *p = getplugin(dirst->d_name);
968
774
if(p == NULL){
969
error(0, errno, "getplugin");
775
perror("getplugin");
970
776
free(filename);
971
777
continue;
972
778
}
984
790
if(g != NULL){
985
791
for(char **a = g->argv + 1; *a != NULL; a++){
986
792
if(not add_argument(p, *a)){
987
error(0, errno, "add_argument");
793
perror("add_argument");
988
794
}
989
795
}
990
796
/* Add global environment variables */
991
797
for(char **e = g->environ; *e != NULL; e++){
992
798
if(not add_environment(p, *e, false)){
993
error(0, errno, "add_environment");
799
perror("add_environment");
994
800
}
995
801
}
996
802
}
1001
807
if(p->environ[0] != NULL){
1002
808
for(char **e = environ; *e != NULL; e++){
1003
809
if(not add_environment(p, *e, false)){
1004
error(0, errno, "add_environment");
810
perror("add_environment");
1005
811
}
1006
812
}
1007
813
}
1008
814
1009
815
int pipefd[2];
1010
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1011
if(ret == -1){
1012
error(0, errno, "pipe");
1013
exitstatus = EX_OSERR;
816
ret = pipe(pipefd);
817
if (ret == -1){
818
perror("pipe");
819
exitstatus = EXIT_FAILURE;
1014
820
goto fallback;
1015
821
}
1016
822
/* Ask OS to automatic close the pipe on exec */
1017
823
ret = set_cloexec_flag(pipefd[0]);
1018
824
if(ret < 0){
1019
error(0, errno, "set_cloexec_flag");
1020
exitstatus = EX_OSERR;
825
perror("set_cloexec_flag");
826
exitstatus = EXIT_FAILURE;
1021
827
goto fallback;
1022
828
}
1023
829
ret = set_cloexec_flag(pipefd[1]);
1024
830
if(ret < 0){
1025
error(0, errno, "set_cloexec_flag");
1026
exitstatus = EX_OSERR;
831
perror("set_cloexec_flag");
832
exitstatus = EXIT_FAILURE;
1027
833
goto fallback;
1028
834
}
1029
835
/* Block SIGCHLD until process is safely in process list */
1030
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1031
&sigchld_action.sa_mask,
1032
NULL));
836
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1033
837
if(ret < 0){
1034
error(0, errno, "sigprocmask");
1035
exitstatus = EX_OSERR;
838
perror("sigprocmask");
839
exitstatus = EXIT_FAILURE;
1036
840
goto fallback;
1037
841
}
1038
842
/* Starting a new process to be watched */
1039
pid_t pid;
1040
do {
1041
pid = fork();
1042
} while(pid == -1 and errno == EINTR);
843
pid_t pid = fork();
1043
844
if(pid == -1){
1044
error(0, errno, "fork");
1045
exitstatus = EX_OSERR;
845
perror("fork");
846
exitstatus = EXIT_FAILURE;
1046
847
goto fallback;
1047
848
}
1048
849
if(pid == 0){
1049
850
/* this is the child process */
1050
851
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1051
852
if(ret < 0){
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
853
perror("sigaction");
854
_exit(EXIT_FAILURE);
1054
855
}
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
856
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1056
857
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
858
perror("sigprocmask");
859
_exit(EXIT_FAILURE);
1059
860
}
1060
861
1061
862
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1062
863
if(ret == -1){
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
864
perror("dup2");
865
_exit(EXIT_FAILURE);
1065
866
}
1066
867
1067
868
if(dirfd(dir) < 0){
1071
872
}
1072
873
if(p->environ[0] == NULL){
1073
874
if(execv(filename, p->argv) < 0){
1074
error(0, errno, "execv for %s", filename);
1075
_exit(EX_OSERR);
875
perror("execv");
876
_exit(EXIT_FAILURE);
1076
877
}
1077
878
} else {
1078
879
if(execve(filename, p->argv, p->environ) < 0){
1079
error(0, errno, "execve for %s", filename);
1080
_exit(EX_OSERR);
880
perror("execve");
881
_exit(EXIT_FAILURE);
1081
882
}
1082
883
}
1083
884
/* no return */
1084
885
}
1085
886
/* Parent process */
1086
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1087
pipe */
887
close(pipefd[1]); /* Close unused write end of pipe */
1088
888
free(filename);
1089
889
plugin *new_plugin = getplugin(dirst->d_name);
1090
if(new_plugin == NULL){
1091
error(0, errno, "getplugin");
1092
ret = (int)(TEMP_FAILURE_RETRY
1093
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1094
NULL)));
890
if (new_plugin == NULL){
891
perror("getplugin");
892
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1095
893
if(ret < 0){
1096
error(0, errno, "sigprocmask");
894
perror("sigprocmask");
1097
895
}
1098
exitstatus = EX_OSERR;
896
exitstatus = EXIT_FAILURE;
1099
897
goto fallback;
1100
898
}
1101
899
1104
902
1105
903
/* Unblock SIGCHLD so signal handler can be run if this process
1106
904
has already completed */
1107
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1108
&sigchld_action.sa_mask,
1109
NULL));
905
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1110
906
if(ret < 0){
1111
error(0, errno, "sigprocmask");
1112
exitstatus = EX_OSERR;
907
perror("sigprocmask");
908
exitstatus = EXIT_FAILURE;
1113
909
goto fallback;
1114
910
}
1115
911
1116
#if defined (__GNUC__) and defined (__GLIBC__)
1117
#if not __GLIBC_PREREQ(2, 16)
1118
#pragma GCC diagnostic push
1119
#pragma GCC diagnostic ignored "-Wsign-conversion"
1120
#endif
1121
#endif
1122
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1123
-Wconversion in GNU libc
1124
before 2.16 */
1125
#if defined (__GNUC__) and defined (__GLIBC__)
1126
#if not __GLIBC_PREREQ(2, 16)
1127
#pragma GCC diagnostic pop
1128
#endif
1129
#endif
912
FD_SET(new_plugin->fd, &rfds_all);
1130
913
1131
if(maxfd < new_plugin->fd){
914
if (maxfd < new_plugin->fd){
1132
915
maxfd = new_plugin->fd;
1133
916
}
917
1134
918
}
1135
919
1136
TEMP_FAILURE_RETRY(closedir(dir));
920
closedir(dir);
1137
921
dir = NULL;
1138
free_plugin(getplugin(NULL));
1139
922
1140
923
for(plugin *p = plugin_list; p != NULL; p = p->next){
1141
924
if(p->pid != 0){
1142
925
break;
1147
930
free_plugin_list();
1148
931
}
1149
932
}
1150
933
1151
934
/* Main loop while running plugins exist */
1152
935
while(plugin_list){
1153
936
fd_set rfds = rfds_all;
1154
937
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1155
if(select_ret == -1 and errno != EINTR){
1156
error(0, errno, "select");
1157
exitstatus = EX_OSERR;
938
if (select_ret == -1){
939
perror("select");
940
exitstatus = EXIT_FAILURE;
1158
941
goto fallback;
1159
942
}
1160
943
/* OK, now either a process completed, or something can be read
1161
944
from one of them */
1162
for(plugin *proc = plugin_list; proc != NULL;){
945
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1163
946
/* Is this process completely done? */
1164
if(proc->completed and proc->eof){
947
if(proc->eof and proc->completed){
1165
948
/* Only accept the plugin output if it exited cleanly */
1166
949
if(not WIFEXITED(proc->status)
1167
950
or WEXITSTATUS(proc->status) != 0){
1168
951
/* Bad exit by plugin */
1169
952
1170
953
if(debug){
1171
954
if(WIFEXITED(proc->status)){
1172
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1173
" status %d\n", proc->name,
1174
(intmax_t) (proc->pid),
955
fprintf(stderr, "Plugin %u exited with status %d\n",
956
(unsigned int) (proc->pid),
1175
957
WEXITSTATUS(proc->status));
1176
} else if(WIFSIGNALED(proc->status)){
1177
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1178
" signal %d: %s\n", proc->name,
1179
(intmax_t) (proc->pid),
1180
WTERMSIG(proc->status),
1181
strsignal(WTERMSIG(proc->status)));
958
} else if(WIFSIGNALED(proc->status)) {
959
fprintf(stderr, "Plugin %u killed by signal %d\n",
960
(unsigned int) (proc->pid),
961
WTERMSIG(proc->status));
1182
962
} else if(WCOREDUMP(proc->status)){
1183
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1184
" core\n", proc->name, (intmax_t) (proc->pid));
963
fprintf(stderr, "Plugin %d dumped core\n",
964
(unsigned int) (proc->pid));
1185
965
}
1186
966
}
1187
967
1188
968
/* Remove the plugin */
1189
#if defined (__GNUC__) and defined (__GLIBC__)
1190
#if not __GLIBC_PREREQ(2, 16)
1191
#pragma GCC diagnostic push
1192
#pragma GCC diagnostic ignored "-Wsign-conversion"
1193
#endif
1194
#endif
1195
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1196
-Wconversion in GNU libc
1197
before 2.16 */
1198
#if defined (__GNUC__) and defined (__GLIBC__)
1199
#if not __GLIBC_PREREQ(2, 16)
1200
#pragma GCC diagnostic pop
1201
#endif
1202
#endif
1203
969
FD_CLR(proc->fd, &rfds_all);
970
1204
971
/* Block signal while modifying process_list */
1205
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1206
(SIG_BLOCK,
1207
&sigchld_action.sa_mask,
1208
NULL));
972
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1209
973
if(ret < 0){
1210
error(0, errno, "sigprocmask");
1211
exitstatus = EX_OSERR;
974
perror("sigprocmask");
975
exitstatus = EXIT_FAILURE;
1212
976
goto fallback;
1213
977
}
1214
1215
plugin *next_plugin = proc->next;
1216
978
free_plugin(proc);
1217
proc = next_plugin;
1218
1219
979
/* We are done modifying process list, so unblock signal */
1220
ret = (int)(TEMP_FAILURE_RETRY
1221
(sigprocmask(SIG_UNBLOCK,
1222
&sigchld_action.sa_mask, NULL)));
980
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
981
NULL);
1223
982
if(ret < 0){
1224
error(0, errno, "sigprocmask");
1225
exitstatus = EX_OSERR;
983
perror("sigprocmask");
984
exitstatus = EXIT_FAILURE;
1226
985
goto fallback;
1227
986
}
1228
987
1229
988
if(plugin_list == NULL){
1230
989
break;
1231
990
}
1232
1233
991
continue;
1234
992
}
1235
993
1236
994
/* This process exited nicely, so print its buffer */
1237
995
1238
996
bool bret = print_out_password(proc->buffer,
1239
997
proc->buffer_length);
1240
998
if(not bret){
1241
error(0, errno, "print_out_password");
1242
exitstatus = EX_IOERR;
999
perror("print_out_password");
1000
exitstatus = EXIT_FAILURE;
1243
1001
}
1244
1002
goto fallback;
1245
1003
}
1246
1004
1247
1005
/* This process has not completed. Does it have any output? */
1248
#if defined (__GNUC__) and defined (__GLIBC__)
1249
#if not __GLIBC_PREREQ(2, 16)
1250
#pragma GCC diagnostic push
1251
#pragma GCC diagnostic ignored "-Wsign-conversion"
1252
#endif
1253
#endif
1254
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1255
warning from
1256
-Wconversion
1257
in GNU libc
1258
before
1259
2.16 */
1260
#if defined (__GNUC__) and defined (__GLIBC__)
1261
#if not __GLIBC_PREREQ(2, 16)
1262
#pragma GCC diagnostic pop
1263
#endif
1264
#endif
1006
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1265
1007
/* This process had nothing to say at this time */
1266
proc = proc->next;
1267
1008
continue;
1268
1009
}
1269
1010
/* Before reading, make the process' data buffer large enough */
1270
1011
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1271
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1272
+ (size_t) BUFFER_SIZE);
1273
if(new_buffer == NULL){
1274
error(0, errno, "malloc");
1275
exitstatus = EX_OSERR;
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;
1276
1017
goto fallback;
1277
1018
}
1278
proc->buffer = new_buffer;
1279
1019
proc->buffer_size += BUFFER_SIZE;
1280
1020
}
1281
1021
/* Read from the process */
1282
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1283
proc->buffer
1284
+ proc->buffer_length,
1285
BUFFER_SIZE));
1286
if(sret < 0){
1022
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1023
BUFFER_SIZE);
1024
if(ret < 0){
1287
1025
/* Read error from this process; ignore the error */
1288
proc = proc->next;
1289
1026
continue;
1290
1027
}
1291
if(sret == 0){
1028
if(ret == 0){
1292
1029
/* got EOF */
1293
1030
proc->eof = true;
1294
1031
} else {
1295
proc->buffer_length += (size_t) sret;
1032
proc->buffer_length += (size_t) ret;
1296
1033
}
1297
1034
}
1298
1035
}
1299
1300
1036
1037
1301
1038
fallback:
1302
1039
1303
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1304
and exitstatus != EX_OK)){
1040
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1305
1041
/* Fallback if all plugins failed, none are found or an error
1306
1042
occured */
1307
1043
bool bret;
1308
1044
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1309
1045
char *passwordbuffer = getpass("Password: ");
1310
size_t len = strlen(passwordbuffer);
1311
/* Strip trailing newline */
1312
if(len > 0 and passwordbuffer[len-1] == '\n'){
1313
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1314
len--;
1315
}
1316
bret = print_out_password(passwordbuffer, len);
1046
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1317
1047
if(not bret){
1318
error(0, errno, "print_out_password");
1319
exitstatus = EX_IOERR;
1048
perror("print_out_password");
1049
exitstatus = EXIT_FAILURE;
1320
1050
}
1321
1051
}
1322
1052
1323
1053
/* Restore old signal handler */
1324
1054
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1325
1055
if(ret == -1){
1326
error(0, errno, "sigaction");
1327
exitstatus = EX_OSERR;
1056
perror("sigaction");
1057
exitstatus = EXIT_FAILURE;
1328
1058
}
1329
1059
1330
1060
if(custom_argv != NULL){
1331
1061
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1332
1062
free(*arg);
1338
1068
closedir(dir);
1339
1069
}
1340
1070
1341
/* Kill the processes */
1071
/* Free the process list and kill the processes */
1342
1072
for(plugin *p = plugin_list; p != NULL; p = p->next){
1343
1073
if(p->pid != 0){
1344
1074
close(p->fd);
1345
1075
ret = kill(p->pid, SIGTERM);
1346
1076
if(ret == -1 and errno != ESRCH){
1347
1077
/* Set-uid proccesses might not get closed */
1348
error(0, errno, "kill");
1078
perror("kill");
1349
1079
}
1350
1080
}
1351
1081
}
1352
1082
1353
1083
/* Wait for any remaining child processes to terminate */
1354
do {
1084
do{
1355
1085
ret = wait(NULL);
1356
1086
} while(ret >= 0);
1357
1087
if(errno != ECHILD){
1358
error(0, errno, "wait");
1088
perror("wait");
1359
1089
}
1360
1090
1361
1091
free_plugin_list();
1362
1092
1363
1093
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0