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- Committer: Teddy Hogeborn
- Date: 2009-01-06 05:10:34 UTC
- mfrom: (237.2.13 mandos)
- Revision ID: teddy@fukt.bsnet.se-20090106051034-4uaqvrf6tl1in0c2
Merge from trunk: remove last traces of debconf stuff.
- files removed:
- DBUS-API
- debian/source
- network-hooks.d
- 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 © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
26
asprintf() */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), getgid(),
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
WEXITSTATUS() */
43
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
45
readdir(), closedir(), dirfd() */
47
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
47
fcntl(), setuid(), setgid(),
49
48
F_GETFD, F_SETFD, FD_CLOEXEC,
50
49
access(), pipe(), fork(), close()
51
50
dup2(), STDOUT_FILENO, _exit(),
52
execve(), write(), read(),
51
execv(), write(), read(),
53
52
close() */
54
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
54
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
#include <string.h> /* strsep, strlen(), asprintf() */
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
64
62
#include <signal.h> /* struct sigaction, sigemptyset(),
65
63
sigaddset(), sigaction(),
66
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
SIG_UNBLOCK, kill() */
69
66
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
75
67
76
68
#define BUFFER_SIZE 256
77
69
79
71
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
72
81
73
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
83
75
84
76
typedef struct plugin{
85
77
char *name; /* can be NULL or any plugin name */
88
80
char **environ;
89
81
int envc;
90
82
bool disabled;
91
83
92
84
/* Variables used for running processes*/
93
85
pid_t pid;
94
86
int fd;
96
88
size_t buffer_size;
97
89
size_t buffer_length;
98
90
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
91
volatile bool completed;
92
volatile int status;
101
93
struct plugin *next;
102
94
} plugin;
103
95
105
97
106
98
/* Gets an existing plugin based on name,
107
99
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
100
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))){
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))){
114
105
return p;
115
106
}
116
107
}
117
108
/* 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){
109
plugin *new_plugin = malloc(sizeof(plugin));
110
if (new_plugin == NULL){
123
111
return NULL;
124
112
}
125
113
char *copy_name = NULL;
126
114
if(name != NULL){
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
115
copy_name = strdup(name);
130
116
if(copy_name == NULL){
131
int e = errno;
132
free(new_plugin);
133
errno = e;
134
117
return NULL;
135
118
}
136
119
}
137
120
138
*new_plugin = (plugin){ .name = copy_name,
139
.argc = 1,
140
.disabled = false,
141
.next = plugin_list };
121
*new_plugin = (plugin) { .name = copy_name,
122
.argc = 1,
123
.disabled = false,
124
.next = plugin_list };
142
125
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;
126
new_plugin->argv = malloc(sizeof(char *) * 2);
127
if (new_plugin->argv == NULL){
148
128
free(copy_name);
149
129
free(new_plugin);
150
errno = e;
151
130
return NULL;
152
131
}
153
132
new_plugin->argv[0] = copy_name;
154
133
new_plugin->argv[1] = NULL;
155
134
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
135
new_plugin->environ = malloc(sizeof(char *));
159
136
if(new_plugin->environ == NULL){
160
int e = errno;
161
137
free(copy_name);
162
138
free(new_plugin->argv);
163
139
free(new_plugin);
164
errno = e;
165
140
return NULL;
166
141
}
167
142
new_plugin->environ[0] = NULL;
172
147
}
173
148
174
149
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
176
150
static bool add_to_char_array(const char *new, char ***array,
177
151
int *len){
178
152
/* 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);
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
184
155
/* Malloc check */
185
if(new_array == NULL){
156
if(*array == NULL){
186
157
return false;
187
158
}
188
*array = new_array;
189
159
/* Make a copy of the new string */
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
160
char *copy = strdup(new);
194
161
if(copy == NULL){
195
162
return false;
196
163
}
203
170
}
204
171
205
172
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
207
173
static bool add_argument(plugin *p, const char *arg){
208
174
if(p == NULL){
209
175
return false;
212
178
}
213
179
214
180
/* Add to a plugin's environment */
215
__attribute__((nonnull(2), warn_unused_result))
216
181
static bool add_environment(plugin *p, const char *def, bool replace){
217
182
if(p == NULL){
218
183
return false;
220
185
/* namelen = length of name of environment variable */
221
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
187
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
225
190
/* It already exists */
226
191
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){
192
char *new = realloc(*e, strlen(def) + 1);
193
if(new == NULL){
232
194
return false;
233
195
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
196
*e = new;
197
strcpy(*e, def);
236
198
}
237
199
return true;
238
200
}
243
205
/*
244
206
* Based on the example in the GNU LibC manual chapter 13.13 "File
245
207
* Descriptor Flags".
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
208
* *Note File Descriptor Flags:(libc)Descriptor Flags.
247
209
*/
248
__attribute__((warn_unused_result))
249
210
static int set_cloexec_flag(int fd){
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
int ret = fcntl(fd, F_GETFD, 0);
251
212
/* If reading the flags failed, return error indication now. */
252
213
if(ret < 0){
253
214
return ret;
254
215
}
255
216
/* Store modified flag word in the descriptor. */
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
257
ret | FD_CLOEXEC));
217
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
258
218
}
259
219
260
220
261
221
/* Mark processes as completed when they exit, and save their exit
262
222
status. */
263
223
static void handle_sigchld(__attribute__((unused)) int sig){
264
int old_errno = errno;
265
224
while(true){
266
225
plugin *proc = plugin_list;
267
226
int status;
271
230
break;
272
231
}
273
232
if(pid == -1){
274
if(errno == ECHILD){
275
/* No child processes */
276
break;
233
if (errno != ECHILD){
234
perror("waitpid");
277
235
}
278
error(0, errno, "waitpid");
236
/* No child processes */
237
break;
279
238
}
280
239
281
240
/* A child exited, find it in process_list */
287
246
continue;
288
247
}
289
248
proc->status = status;
290
proc->completed = 1;
249
proc->completed = true;
291
250
}
292
errno = old_errno;
293
251
}
294
252
295
253
/* Prints out a password to stdout */
296
__attribute__((nonnull, warn_unused_result))
297
254
static bool print_out_password(const char *buffer, size_t length){
298
255
ssize_t ret;
299
256
for(size_t written = 0; written < length; written += (size_t)ret){
307
264
}
308
265
309
266
/* Removes and free a plugin from the plugin list */
310
__attribute__((nonnull))
311
267
static void free_plugin(plugin *plugin_node){
312
268
313
269
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
319
275
}
320
276
free(plugin_node->environ);
321
277
free(plugin_node->buffer);
322
278
323
279
/* Removes the plugin from the singly-linked list */
324
280
if(plugin_node == plugin_list){
325
281
/* First one - simple */
353
309
struct stat st;
354
310
fd_set rfds_all;
355
311
int ret, maxfd = 0;
356
ssize_t sret;
357
312
uid_t uid = 65534;
358
313
gid_t gid = 65534;
359
314
bool debug = false;
368
323
sigemptyset(&sigchld_action.sa_mask);
369
324
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
370
325
if(ret == -1){
371
error(0, errno, "sigaddset");
372
exitstatus = EX_OSERR;
326
perror("sigaddset");
327
exitstatus = EXIT_FAILURE;
373
328
goto fallback;
374
329
}
375
330
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
376
331
if(ret == -1){
377
error(0, errno, "sigaction");
378
exitstatus = EX_OSERR;
332
perror("sigaction");
333
exitstatus = EXIT_FAILURE;
379
334
goto fallback;
380
335
}
381
336
413
368
.doc = "Group ID the plugins will run as", .group = 3 },
414
369
{ .name = "debug", .key = 132,
415
370
.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
371
{ .name = NULL }
426
372
};
427
373
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;
374
error_t parse_opt (int key, char *arg, __attribute__((unused))
375
struct argp_state *state) {
376
switch (key) {
434
377
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;
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;
440
387
}
441
388
}
442
errno = 0;
443
389
}
444
390
break;
445
391
case 'G': /* --global-env */
446
if(add_environment(getplugin(NULL), arg, true)){
447
errno = 0;
392
if(arg == NULL){
393
break;
394
}
395
if(not add_environment(getplugin(NULL), arg, true)){
396
perror("add_environment");
448
397
}
449
398
break;
450
399
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;
469
}
470
}
471
errno = 0;
400
if (arg != NULL){
401
char *p_name = strsep(&arg, ":");
402
if(p_name[0] == '\0' or arg == NULL){
403
break;
404
}
405
char *opt = strsep(&arg, ":");
406
if(opt[0] == '\0' or opt == NULL){
407
break;
408
}
409
char *p;
410
while((p = strsep(&opt, ",")) != NULL){
411
if(p[0] == '\0'){
412
continue;
413
}
414
if(not add_argument(getplugin(p_name), p)){
415
perror("add_argument");
416
return ARGP_ERR_UNKNOWN;
417
}
418
}
472
419
}
473
420
break;
474
421
case 'E': /* --env-for */
422
if(arg == NULL){
423
break;
424
}
475
425
{
476
426
char *envdef = strchr(arg, ':');
477
427
if(envdef == NULL){
478
argp_error(state, "No colon in \"%s\"", arg);
479
errno = EINVAL;
480
428
break;
481
429
}
482
430
*envdef = '\0';
483
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;
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
491
433
}
492
434
}
493
435
break;
494
436
case 'd': /* --disable */
495
{
437
if (arg != NULL){
496
438
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = true;
499
errno = 0;
439
if(p == NULL){
440
return ARGP_ERR_UNKNOWN;
500
441
}
442
p->disabled = true;
501
443
}
502
444
break;
503
445
case 'e': /* --enable */
504
{
446
if (arg != NULL){
505
447
plugin *p = getplugin(arg);
506
if(p != NULL){
507
p->disabled = false;
508
errno = 0;
448
if(p == NULL){
449
return ARGP_ERR_UNKNOWN;
509
450
}
451
p->disabled = false;
510
452
}
511
453
break;
512
454
case 128: /* --plugin-dir */
513
455
free(plugindir);
514
456
plugindir = strdup(arg);
515
if(plugindir != NULL){
516
errno = 0;
517
}
457
if(plugindir == NULL){
458
perror("strdup");
459
}
518
460
break;
519
461
case 129: /* --config-file */
520
462
/* This is already done by parse_opt_config_file() */
521
463
break;
522
464
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;
465
uid = (uid_t)strtol(arg, NULL, 10);
532
466
break;
533
467
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;
468
gid = (gid_t)strtol(arg, NULL, 10);
543
469
break;
544
470
case 132: /* --debug */
545
471
debug = true;
546
472
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
473
case ARGP_KEY_ARG:
566
474
/* Cryptsetup always passes an argument, which is an empty
567
475
string if "none" was specified in /etc/crypttab. So if
568
476
argument was empty, we ignore it silently. */
569
if(arg[0] == '\0'){
570
break;
477
if(arg[0] != '\0'){
478
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
571
479
}
480
break;
481
case ARGP_KEY_END:
482
break;
572
483
default:
573
484
return ARGP_ERR_UNKNOWN;
574
485
}
575
return errno; /* Set to 0 at start */
486
return 0;
576
487
}
577
488
578
489
/* This option parser is the same as parse_opt() above, except it
579
490
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){
491
error_t parse_opt_config_file (int key, char *arg,
492
__attribute__((unused))
493
struct argp_state *state) {
494
switch (key) {
585
495
case 'g': /* --global-options */
586
496
case 'G': /* --global-env */
587
497
case 'o': /* --options-for */
593
503
case 129: /* --config-file */
594
504
free(argfile);
595
505
argfile = strdup(arg);
596
if(argfile != NULL){
597
errno = 0;
506
if(argfile == NULL){
507
perror("strdup");
598
508
}
599
break;
509
break;
600
510
case 130: /* --userid */
601
511
case 131: /* --groupid */
602
512
case 132: /* --debug */
603
case '?': /* --help */
604
case -3: /* --usage */
605
case 'V': /* --version */
606
513
case ARGP_KEY_ARG:
514
case ARGP_KEY_END:
607
515
break;
608
516
default:
609
517
return ARGP_ERR_UNKNOWN;
610
518
}
611
return errno;
519
return 0;
612
520
}
613
521
614
522
struct argp argp = { .options = options,
616
524
.args_doc = "",
617
525
.doc = "Mandos plugin runner -- Run plugins" };
618
526
619
/* Parse using parse_opt_config_file() in order to get the custom
527
/* Parse using the parse_opt_config_file in order to get the custom
620
528
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;
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;
635
533
goto fallback;
636
534
}
637
535
639
537
argp.parser = parse_opt;
640
538
641
539
/* Open the configfile if available */
642
if(argfile == NULL){
540
if (argfile == NULL){
643
541
conffp = fopen(AFILE, "r");
644
542
} else {
645
543
conffp = fopen(argfile, "r");
646
}
544
}
647
545
if(conffp != NULL){
648
546
char *org_line = NULL;
649
547
char *p, *arg, *new_arg, *line;
650
548
size_t size = 0;
549
ssize_t sret;
651
550
const char whitespace_delims[] = " \r\t\f\v\n";
652
551
const char comment_delim[] = "#";
653
552
654
553
custom_argc = 1;
655
554
custom_argv = malloc(sizeof(char*) * 2);
656
555
if(custom_argv == NULL){
657
error(0, errno, "malloc");
658
exitstatus = EX_OSERR;
556
perror("malloc");
557
exitstatus = EXIT_FAILURE;
659
558
goto fallback;
660
559
}
661
560
custom_argv[0] = argv[0];
662
561
custom_argv[1] = NULL;
663
562
664
563
/* for each line in the config file, strip whitespace and ignore
665
564
commented text */
666
565
while(true){
668
567
if(sret == -1){
669
568
break;
670
569
}
671
570
672
571
line = org_line;
673
572
arg = strsep(&line, comment_delim);
674
573
while((p = strsep(&arg, whitespace_delims)) != NULL){
677
576
}
678
577
new_arg = strdup(p);
679
578
if(new_arg == NULL){
680
error(0, errno, "strdup");
681
exitstatus = EX_OSERR;
579
perror("strdup");
580
exitstatus = EXIT_FAILURE;
682
581
free(org_line);
683
582
goto fallback;
684
583
}
685
584
686
585
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
}
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;
700
593
}
701
594
custom_argv[custom_argc-1] = new_arg;
702
custom_argv[custom_argc] = NULL;
595
custom_argv[custom_argc] = NULL;
703
596
}
704
597
}
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
598
free(org_line);
714
599
} else {
715
600
/* Check for harmful errors and go to fallback. Other errors might
716
601
not affect opening plugins */
717
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
603
perror("fopen");
604
exitstatus = EXIT_FAILURE;
720
605
goto fallback;
721
606
}
722
607
}
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
725
610
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;
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;
740
616
goto fallback;
741
617
}
742
618
}
743
619
744
620
/* Parse actual command line arguments, to let them override the
745
621
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;
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;
760
626
goto fallback;
761
627
}
762
628
767
633
for(char **a = p->argv; *a != NULL; a++){
768
634
fprintf(stderr, "\tArg: %s\n", *a);
769
635
}
770
fprintf(stderr, "...and %d environment variables\n", p->envc);
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
771
637
for(char **a = p->environ; *a != NULL; a++){
772
638
fprintf(stderr, "\t%s\n", *a);
773
639
}
774
640
}
775
641
}
776
642
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(\"" PDIR "\")");
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
}
643
/* Strip permissions down to nobody */
804
644
ret = setuid(uid);
805
if(ret == -1){
806
error(0, errno, "setuid");
807
}
808
809
/* Open plugin directory with close_on_exec flag */
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 */
810
666
{
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;
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
}
852
675
}
853
676
}
854
677
856
679
857
680
/* Read and execute any executable in the plugin directory*/
858
681
while(true){
859
do {
860
dirst = readdir(dir);
861
} while(dirst == NULL and errno == EINTR);
682
dirst = readdir(dir);
862
683
863
684
/* All directory entries have been processed */
864
685
if(dirst == NULL){
865
if(errno == EBADF){
866
error(0, errno, "readdir");
867
exitstatus = EX_IOERR;
686
if (errno == EBADF){
687
perror("readdir");
688
exitstatus = EXIT_FAILURE;
868
689
goto fallback;
869
690
}
870
691
break;
876
697
{
877
698
bool bad_name = false;
878
699
879
const char * const bad_prefixes[] = { ".", "#", NULL };
700
const char const *bad_prefixes[] = { ".", "#", NULL };
880
701
881
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
702
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
882
703
".dpkg-old",
883
704
".dpkg-bak",
884
705
".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
706
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
894
707
size_t pre_len = strlen(*pre);
895
708
if((d_name_len >= pre_len)
896
709
and strncmp((dirst->d_name), *pre, pre_len) == 0){
905
718
if(bad_name){
906
719
continue;
907
720
}
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
721
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
917
722
size_t suf_len = strlen(*suf);
918
723
if((d_name_len >= suf_len)
919
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
724
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
920
725
== 0)){
921
726
if(debug){
922
727
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
931
736
continue;
932
737
}
933
738
}
934
739
935
740
char *filename;
936
741
if(plugindir == NULL){
937
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
938
dirst->d_name));
742
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
939
743
} else {
940
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
941
plugindir,
942
dirst->d_name));
744
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
943
745
}
944
746
if(ret < 0){
945
error(0, errno, "asprintf");
747
perror("asprintf");
946
748
continue;
947
749
}
948
750
949
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
950
if(ret == -1){
951
error(0, errno, "stat");
751
ret = stat(filename, &st);
752
if (ret == -1){
753
perror("stat");
952
754
free(filename);
953
755
continue;
954
756
}
955
757
956
758
/* Ignore non-executable files */
957
if(not S_ISREG(st.st_mode)
958
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
759
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
959
760
if(debug){
960
761
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
961
762
" with bad type or mode\n", filename);
966
767
967
768
plugin *p = getplugin(dirst->d_name);
968
769
if(p == NULL){
969
error(0, errno, "getplugin");
770
perror("getplugin");
970
771
free(filename);
971
772
continue;
972
773
}
984
785
if(g != NULL){
985
786
for(char **a = g->argv + 1; *a != NULL; a++){
986
787
if(not add_argument(p, *a)){
987
error(0, errno, "add_argument");
788
perror("add_argument");
988
789
}
989
790
}
990
791
/* Add global environment variables */
991
792
for(char **e = g->environ; *e != NULL; e++){
992
793
if(not add_environment(p, *e, false)){
993
error(0, errno, "add_environment");
794
perror("add_environment");
994
795
}
995
796
}
996
797
}
1001
802
if(p->environ[0] != NULL){
1002
803
for(char **e = environ; *e != NULL; e++){
1003
804
if(not add_environment(p, *e, false)){
1004
error(0, errno, "add_environment");
805
perror("add_environment");
1005
806
}
1006
807
}
1007
808
}
1008
809
1009
810
int pipefd[2];
1010
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1011
if(ret == -1){
1012
error(0, errno, "pipe");
1013
exitstatus = EX_OSERR;
811
ret = pipe(pipefd);
812
if (ret == -1){
813
perror("pipe");
814
exitstatus = EXIT_FAILURE;
1014
815
goto fallback;
1015
816
}
1016
817
/* Ask OS to automatic close the pipe on exec */
1017
818
ret = set_cloexec_flag(pipefd[0]);
1018
819
if(ret < 0){
1019
error(0, errno, "set_cloexec_flag");
1020
exitstatus = EX_OSERR;
820
perror("set_cloexec_flag");
821
exitstatus = EXIT_FAILURE;
1021
822
goto fallback;
1022
823
}
1023
824
ret = set_cloexec_flag(pipefd[1]);
1024
825
if(ret < 0){
1025
error(0, errno, "set_cloexec_flag");
1026
exitstatus = EX_OSERR;
826
perror("set_cloexec_flag");
827
exitstatus = EXIT_FAILURE;
1027
828
goto fallback;
1028
829
}
1029
830
/* 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));
831
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1033
832
if(ret < 0){
1034
error(0, errno, "sigprocmask");
1035
exitstatus = EX_OSERR;
833
perror("sigprocmask");
834
exitstatus = EXIT_FAILURE;
1036
835
goto fallback;
1037
836
}
1038
837
/* Starting a new process to be watched */
1039
pid_t pid;
1040
do {
1041
pid = fork();
1042
} while(pid == -1 and errno == EINTR);
838
pid_t pid = fork();
1043
839
if(pid == -1){
1044
error(0, errno, "fork");
1045
exitstatus = EX_OSERR;
840
perror("fork");
841
exitstatus = EXIT_FAILURE;
1046
842
goto fallback;
1047
843
}
1048
844
if(pid == 0){
1049
845
/* this is the child process */
1050
846
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1051
847
if(ret < 0){
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
848
perror("sigaction");
849
_exit(EXIT_FAILURE);
1054
850
}
1055
851
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1056
852
if(ret < 0){
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
853
perror("sigprocmask");
854
_exit(EXIT_FAILURE);
1059
855
}
1060
856
1061
857
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1062
858
if(ret == -1){
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
859
perror("dup2");
860
_exit(EXIT_FAILURE);
1065
861
}
1066
862
1067
863
if(dirfd(dir) < 0){
1069
865
above and must now close it manually here. */
1070
866
closedir(dir);
1071
867
}
1072
if(execve(filename, p->argv,
1073
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1074
error(0, errno, "execve for %s", filename);
1075
_exit(EX_OSERR);
868
if(p->environ[0] == NULL){
869
if(execv(filename, p->argv) < 0){
870
perror("execv");
871
_exit(EXIT_FAILURE);
872
}
873
} else {
874
if(execve(filename, p->argv, p->environ) < 0){
875
perror("execve");
876
_exit(EXIT_FAILURE);
877
}
1076
878
}
1077
879
/* no return */
1078
880
}
1079
881
/* Parent process */
1080
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1081
pipe */
882
close(pipefd[1]); /* Close unused write end of pipe */
1082
883
free(filename);
1083
884
plugin *new_plugin = getplugin(dirst->d_name);
1084
if(new_plugin == NULL){
1085
error(0, errno, "getplugin");
1086
ret = (int)(TEMP_FAILURE_RETRY
1087
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1088
NULL)));
885
if (new_plugin == NULL){
886
perror("getplugin");
887
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
888
if(ret < 0){
1090
error(0, errno, "sigprocmask");
889
perror("sigprocmask");
1091
890
}
1092
exitstatus = EX_OSERR;
891
exitstatus = EXIT_FAILURE;
1093
892
goto fallback;
1094
893
}
1095
894
1098
897
1099
898
/* Unblock SIGCHLD so signal handler can be run if this process
1100
899
has already completed */
1101
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1102
&sigchld_action.sa_mask,
1103
NULL));
900
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1104
901
if(ret < 0){
1105
error(0, errno, "sigprocmask");
1106
exitstatus = EX_OSERR;
902
perror("sigprocmask");
903
exitstatus = EXIT_FAILURE;
1107
904
goto fallback;
1108
905
}
1109
906
1110
#if defined (__GNUC__) and defined (__GLIBC__)
1111
#if not __GLIBC_PREREQ(2, 16)
1112
#pragma GCC diagnostic push
1113
#pragma GCC diagnostic ignored "-Wsign-conversion"
1114
#endif
1115
#endif
1116
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1117
-Wconversion in GNU libc
1118
before 2.16 */
1119
#if defined (__GNUC__) and defined (__GLIBC__)
1120
#if not __GLIBC_PREREQ(2, 16)
1121
#pragma GCC diagnostic pop
1122
#endif
1123
#endif
907
FD_SET(new_plugin->fd, &rfds_all);
1124
908
1125
if(maxfd < new_plugin->fd){
909
if (maxfd < new_plugin->fd){
1126
910
maxfd = new_plugin->fd;
1127
911
}
1128
912
}
1129
913
1130
TEMP_FAILURE_RETRY(closedir(dir));
914
closedir(dir);
1131
915
dir = NULL;
1132
free_plugin(getplugin(NULL));
1133
916
1134
917
for(plugin *p = plugin_list; p != NULL; p = p->next){
1135
918
if(p->pid != 0){
1146
929
while(plugin_list){
1147
930
fd_set rfds = rfds_all;
1148
931
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1149
if(select_ret == -1 and errno != EINTR){
1150
error(0, errno, "select");
1151
exitstatus = EX_OSERR;
932
if (select_ret == -1){
933
perror("select");
934
exitstatus = EXIT_FAILURE;
1152
935
goto fallback;
1153
936
}
1154
937
/* OK, now either a process completed, or something can be read
1155
938
from one of them */
1156
939
for(plugin *proc = plugin_list; proc != NULL;){
1157
940
/* Is this process completely done? */
1158
if(proc->completed and proc->eof){
941
if(proc->eof and proc->completed){
1159
942
/* Only accept the plugin output if it exited cleanly */
1160
943
if(not WIFEXITED(proc->status)
1161
944
or WEXITSTATUS(proc->status) != 0){
1162
945
/* Bad exit by plugin */
1163
946
1164
947
if(debug){
1165
948
if(WIFEXITED(proc->status)){
1166
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1167
" status %d\n", proc->name,
1168
(intmax_t) (proc->pid),
949
fprintf(stderr, "Plugin %u exited with status %d\n",
950
(unsigned int) (proc->pid),
1169
951
WEXITSTATUS(proc->status));
1170
} else if(WIFSIGNALED(proc->status)){
1171
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1172
" signal %d: %s\n", proc->name,
1173
(intmax_t) (proc->pid),
1174
WTERMSIG(proc->status),
1175
strsignal(WTERMSIG(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));
1176
956
} else if(WCOREDUMP(proc->status)){
1177
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1178
" core\n", proc->name, (intmax_t) (proc->pid));
957
fprintf(stderr, "Plugin %d dumped core\n",
958
(unsigned int) (proc->pid));
1179
959
}
1180
960
}
1181
961
1182
962
/* Remove the plugin */
1183
#if defined (__GNUC__) and defined (__GLIBC__)
1184
#if not __GLIBC_PREREQ(2, 16)
1185
#pragma GCC diagnostic push
1186
#pragma GCC diagnostic ignored "-Wsign-conversion"
1187
#endif
1188
#endif
1189
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1190
-Wconversion in GNU libc
1191
before 2.16 */
1192
#if defined (__GNUC__) and defined (__GLIBC__)
1193
#if not __GLIBC_PREREQ(2, 16)
1194
#pragma GCC diagnostic pop
1195
#endif
1196
#endif
1197
963
FD_CLR(proc->fd, &rfds_all);
964
1198
965
/* Block signal while modifying process_list */
1199
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1200
(SIG_BLOCK,
1201
&sigchld_action.sa_mask,
1202
NULL));
966
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1203
967
if(ret < 0){
1204
error(0, errno, "sigprocmask");
1205
exitstatus = EX_OSERR;
968
perror("sigprocmask");
969
exitstatus = EXIT_FAILURE;
1206
970
goto fallback;
1207
971
}
1208
972
1211
975
proc = next_plugin;
1212
976
1213
977
/* We are done modifying process list, so unblock signal */
1214
ret = (int)(TEMP_FAILURE_RETRY
1215
(sigprocmask(SIG_UNBLOCK,
1216
&sigchld_action.sa_mask, NULL)));
978
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
979
NULL);
1217
980
if(ret < 0){
1218
error(0, errno, "sigprocmask");
1219
exitstatus = EX_OSERR;
981
perror("sigprocmask");
982
exitstatus = EXIT_FAILURE;
1220
983
goto fallback;
1221
984
}
1222
985
1232
995
bool bret = print_out_password(proc->buffer,
1233
996
proc->buffer_length);
1234
997
if(not bret){
1235
error(0, errno, "print_out_password");
1236
exitstatus = EX_IOERR;
998
perror("print_out_password");
999
exitstatus = EXIT_FAILURE;
1237
1000
}
1238
1001
goto fallback;
1239
1002
}
1240
1003
1241
1004
/* This process has not completed. Does it have any output? */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic push
1245
#pragma GCC diagnostic ignored "-Wsign-conversion"
1246
#endif
1247
#endif
1248
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1249
warning from
1250
-Wconversion
1251
in GNU libc
1252
before
1253
2.16 */
1254
#if defined (__GNUC__) and defined (__GLIBC__)
1255
#if not __GLIBC_PREREQ(2, 16)
1256
#pragma GCC diagnostic pop
1257
#endif
1258
#endif
1005
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1259
1006
/* This process had nothing to say at this time */
1260
1007
proc = proc->next;
1261
1008
continue;
1262
1009
}
1263
1010
/* Before reading, make the process' data buffer large enough */
1264
1011
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1265
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1266
+ (size_t) BUFFER_SIZE);
1267
if(new_buffer == NULL){
1268
error(0, errno, "malloc");
1269
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;
1270
1017
goto fallback;
1271
1018
}
1272
proc->buffer = new_buffer;
1273
1019
proc->buffer_size += BUFFER_SIZE;
1274
1020
}
1275
1021
/* Read from the process */
1276
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1277
proc->buffer
1278
+ proc->buffer_length,
1279
BUFFER_SIZE));
1280
if(sret < 0){
1022
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1023
BUFFER_SIZE);
1024
if(ret < 0){
1281
1025
/* Read error from this process; ignore the error */
1282
1026
proc = proc->next;
1283
1027
continue;
1284
1028
}
1285
if(sret == 0){
1029
if(ret == 0){
1286
1030
/* got EOF */
1287
1031
proc->eof = true;
1288
1032
} else {
1289
proc->buffer_length += (size_t) sret;
1033
proc->buffer_length += (size_t) ret;
1290
1034
}
1291
1035
}
1292
1036
}
1293
1294
1037
1038
1295
1039
fallback:
1296
1040
1297
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1298
and exitstatus != EX_OK)){
1041
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1299
1042
/* Fallback if all plugins failed, none are found or an error
1300
1043
occured */
1301
1044
bool bret;
1309
1052
}
1310
1053
bret = print_out_password(passwordbuffer, len);
1311
1054
if(not bret){
1312
error(0, errno, "print_out_password");
1313
exitstatus = EX_IOERR;
1055
perror("print_out_password");
1056
exitstatus = EXIT_FAILURE;
1314
1057
}
1315
1058
}
1316
1059
1317
1060
/* Restore old signal handler */
1318
1061
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1319
1062
if(ret == -1){
1320
error(0, errno, "sigaction");
1321
exitstatus = EX_OSERR;
1063
perror("sigaction");
1064
exitstatus = EXIT_FAILURE;
1322
1065
}
1323
1066
1324
1067
if(custom_argv != NULL){
1339
1082
ret = kill(p->pid, SIGTERM);
1340
1083
if(ret == -1 and errno != ESRCH){
1341
1084
/* Set-uid proccesses might not get closed */
1342
error(0, errno, "kill");
1085
perror("kill");
1343
1086
}
1344
1087
}
1345
1088
}
1346
1089
1347
1090
/* Wait for any remaining child processes to terminate */
1348
do {
1091
do{
1349
1092
ret = wait(NULL);
1350
1093
} while(ret >= 0);
1351
1094
if(errno != ECHILD){
1352
error(0, errno, "wait");
1095
perror("wait");
1353
1096
}
1354
1097
1355
1098
free_plugin_list();
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0