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- Committer: Teddy Hogeborn
- Date: 2008-09-01 08:29:23 UTC
- Revision ID: teddy@fukt.bsnet.se-20080901082923-i2liq6t7warmu9xe
* mandos.xml: Enclose "RAM" with <acronym>.
* overview.xml: - '' -
* plugin-runner.xml (DESCRIPTION): Improved wording.
(PURPOSE): New section.
(OPTIONS): Improved wording.
(OVERVIEW, PLUGINS): New section.
(FALLBACK): New empty placeholder section.
* plugins.d/password-prompt.xml: Enclose "RAM" with <acronym>.
* overview.xml: - '' -
* plugin-runner.xml (DESCRIPTION): Improved wording.
(PURPOSE): New section.
(OPTIONS): Improved wording.
(OVERVIEW, PLUGINS): New section.
(FALLBACK): New empty placeholder section.
* plugins.d/password-prompt.xml: Enclose "RAM" with <acronym>.
- 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
101
static plugin *getplugin(char *name){
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))){
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))){
113
106
return p;
114
107
}
115
108
}
116
109
/* Create a new plugin */
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){
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
122
112
return NULL;
123
113
}
124
114
char *copy_name = NULL;
125
115
if(name != NULL){
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
116
copy_name = strdup(name);
129
117
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
133
118
return NULL;
134
119
}
135
120
}
136
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
141
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;
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){
147
129
free(copy_name);
148
130
free(new_plugin);
149
errno = e;
150
131
return NULL;
151
132
}
152
133
new_plugin->argv[0] = copy_name;
153
134
new_plugin->argv[1] = NULL;
154
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
135
136
new_plugin->environ = malloc(sizeof(char *));
158
137
if(new_plugin->environ == NULL){
159
int e = errno;
160
138
free(copy_name);
161
139
free(new_plugin->argv);
162
140
free(new_plugin);
163
errno = e;
164
141
return NULL;
165
142
}
166
143
new_plugin->environ[0] = NULL;
167
144
168
145
/* Append the new plugin to the list */
169
146
plugin_list = new_plugin;
170
147
return new_plugin;
171
148
}
172
149
173
150
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
175
151
static bool add_to_char_array(const char *new, char ***array,
176
152
int *len){
177
153
/* Resize the pointed-to array to hold one more pointer */
178
do {
179
*array = realloc(*array, sizeof(char *)
180
* (size_t) ((*len) + 2));
181
} while(*array == NULL and errno == EINTR);
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
182
156
/* Malloc check */
183
157
if(*array == NULL){
184
158
return false;
185
159
}
186
160
/* Make a copy of the new string */
187
char *copy;
188
do {
189
copy = strdup(new);
190
} while(copy == NULL and errno == EINTR);
161
char *copy = strdup(new);
191
162
if(copy == NULL){
192
163
return false;
193
164
}
200
171
}
201
172
202
173
/* Add to a plugin's argument vector */
203
__attribute__((nonnull(2)))
204
174
static bool add_argument(plugin *p, const char *arg){
205
175
if(p == NULL){
206
176
return false;
209
179
}
210
180
211
181
/* Add to a plugin's environment */
212
__attribute__((nonnull(2)))
213
static bool add_environment(plugin *p, const char *def, bool replace){
182
static bool add_environment(plugin *p, const char *def){
214
183
if(p == NULL){
215
184
return false;
216
185
}
217
/* namelen = length of name of environment variable */
218
size_t namelen = (size_t)(strchrnul(def, '=') - def);
219
/* Search for this environment variable */
220
for(char **e = p->environ; *e != NULL; e++){
221
if(strncmp(*e, def, namelen + 1) == 0){
222
/* It already exists */
223
if(replace){
224
char *new;
225
do {
226
new = realloc(*e, strlen(def) + 1);
227
} while(new == NULL and errno == EINTR);
228
if(new == NULL){
229
return false;
230
}
231
*e = new;
232
strcpy(*e, def);
233
}
234
return true;
235
}
236
}
237
186
return add_to_char_array(def, &(p->environ), &(p->envc));
238
187
}
239
188
240
189
/*
241
190
* Based on the example in the GNU LibC manual chapter 13.13 "File
242
191
* Descriptor Flags".
243
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
192
* *Note File Descriptor Flags:(libc)Descriptor Flags.
244
193
*/
245
static int set_cloexec_flag(int fd){
246
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
194
static int set_cloexec_flag(int fd)
195
{
196
int ret = fcntl(fd, F_GETFD, 0);
247
197
/* If reading the flags failed, return error indication now. */
248
198
if(ret < 0){
249
199
return ret;
250
200
}
251
201
/* Store modified flag word in the descriptor. */
252
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
253
ret | FD_CLOEXEC));
202
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
254
203
}
255
204
256
205
257
206
/* Mark processes as completed when they exit, and save their exit
258
207
status. */
259
static void handle_sigchld(__attribute__((unused)) int sig){
260
int old_errno = errno;
208
void handle_sigchld(__attribute__((unused)) int sig){
261
209
while(true){
262
210
plugin *proc = plugin_list;
263
211
int status;
267
215
break;
268
216
}
269
217
if(pid == -1){
270
if(errno == ECHILD){
271
/* No child processes */
272
break;
218
if (errno != ECHILD){
219
perror("waitpid");
273
220
}
274
error(0, errno, "waitpid");
221
/* No child processes */
222
break;
275
223
}
276
224
277
225
/* A child exited, find it in process_list */
278
226
while(proc != NULL and proc->pid != pid){
279
227
proc = proc->next;
283
231
continue;
284
232
}
285
233
proc->status = status;
286
proc->completed = 1;
234
proc->completed = true;
287
235
}
288
errno = old_errno;
289
236
}
290
237
291
238
/* Prints out a password to stdout */
292
__attribute__((nonnull))
293
static bool print_out_password(const char *buffer, size_t length){
239
bool print_out_password(const char *buffer, size_t length){
294
240
ssize_t ret;
241
if(length>0 and buffer[length-1] == '\n'){
242
length--;
243
}
295
244
for(size_t written = 0; written < length; written += (size_t)ret){
296
245
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
297
246
length - written));
303
252
}
304
253
305
254
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
307
255
static void free_plugin(plugin *plugin_node){
308
256
309
257
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
315
263
}
316
264
free(plugin_node->environ);
317
265
free(plugin_node->buffer);
318
266
319
267
/* Removes the plugin from the singly-linked list */
320
268
if(plugin_node == plugin_list){
321
269
/* First one - simple */
349
297
struct stat st;
350
298
fd_set rfds_all;
351
299
int ret, maxfd = 0;
352
ssize_t sret;
353
300
uid_t uid = 65534;
354
301
gid_t gid = 65534;
355
302
bool debug = false;
364
311
sigemptyset(&sigchld_action.sa_mask);
365
312
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
366
313
if(ret == -1){
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
314
perror("sigaddset");
315
exitstatus = EXIT_FAILURE;
369
316
goto fallback;
370
317
}
371
318
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
372
319
if(ret == -1){
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
320
perror("sigaction");
321
exitstatus = EXIT_FAILURE;
375
322
goto fallback;
376
323
}
377
324
380
327
{ .name = "global-options", .key = 'g',
381
328
.arg = "OPTION[,OPTION[,...]]",
382
329
.doc = "Options passed to all plugins" },
383
{ .name = "global-env", .key = 'G',
330
{ .name = "global-envs", .key = 'e',
384
331
.arg = "VAR=value",
385
332
.doc = "Environment variable passed to all plugins" },
386
333
{ .name = "options-for", .key = 'o',
387
334
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
388
335
.doc = "Options passed only to specified plugin" },
389
{ .name = "env-for", .key = 'E',
336
{ .name = "envs-for", .key = 'f',
390
337
.arg = "PLUGIN:ENV=value",
391
338
.doc = "Environment variable passed to specified plugin" },
392
339
{ .name = "disable", .key = 'd',
393
340
.arg = "PLUGIN",
394
341
.doc = "Disable a specific plugin", .group = 1 },
395
{ .name = "enable", .key = 'e',
396
.arg = "PLUGIN",
397
.doc = "Enable a specific plugin", .group = 1 },
398
342
{ .name = "plugin-dir", .key = 128,
399
343
.arg = "DIRECTORY",
400
344
.doc = "Specify a different plugin directory", .group = 2 },
409
353
.doc = "Group ID the plugins will run as", .group = 3 },
410
354
{ .name = "debug", .key = 132,
411
355
.doc = "Debug mode", .group = 4 },
412
/*
413
* These reproduce what we would get without ARGP_NO_HELP
414
*/
415
{ .name = "help", .key = '?',
416
.doc = "Give this help list", .group = -1 },
417
{ .name = "usage", .key = -3,
418
.doc = "Give a short usage message", .group = -1 },
419
{ .name = "version", .key = 'V',
420
.doc = "Print program version", .group = -1 },
421
356
{ .name = NULL }
422
357
};
423
358
424
__attribute__((nonnull(3)))
425
error_t parse_opt(int key, char *arg, struct argp_state *state){
426
errno = 0;
427
switch(key){
428
char *tmp;
429
intmax_t tmp_id;
359
error_t parse_opt (int key, char *arg, __attribute__((unused))
360
struct argp_state *state) {
361
/* Get the INPUT argument from `argp_parse', which we know is a
362
pointer to our plugin list pointer. */
363
switch (key) {
430
364
case 'g': /* --global-options */
365
if (arg != NULL){
366
char *p;
367
while((p = strsep(&arg, ",")) != NULL){
368
if(p[0] == '\0'){
369
continue;
370
}
371
if(not add_argument(getplugin(NULL), p)){
372
perror("add_argument");
373
return ARGP_ERR_UNKNOWN;
374
}
375
}
376
}
377
break;
378
case 'e': /* --global-envs */
379
if(arg == NULL){
380
break;
381
}
431
382
{
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(NULL), plugin_option)){
435
break;
436
}
383
char *envdef = strdup(arg);
384
if(envdef == NULL){
385
break;
386
}
387
if(not add_environment(getplugin(NULL), envdef)){
388
perror("add_environment");
437
389
}
438
390
}
439
391
break;
440
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
442
break;
443
392
case 'o': /* --options-for */
444
{
445
char *option_list = strchr(arg, ':');
446
if(option_list == NULL){
447
argp_error(state, "No colon in \"%s\"", arg);
448
errno = EINVAL;
449
break;
450
}
451
*option_list = '\0';
452
option_list++;
453
if(arg[0] == '\0'){
454
argp_error(state, "Empty plugin name");
455
errno = EINVAL;
456
break;
457
}
458
char *option;
459
while((option = strsep(&option_list, ",")) != NULL){
460
if(not add_argument(getplugin(arg), option)){
461
break;
393
if (arg != NULL){
394
char *p_name = strsep(&arg, ":");
395
if(p_name[0] == '\0'){
396
break;
397
}
398
char *opt = strsep(&arg, ":");
399
if(opt[0] == '\0'){
400
break;
401
}
402
if(opt != NULL){
403
char *p;
404
while((p = strsep(&opt, ",")) != NULL){
405
if(p[0] == '\0'){
406
continue;
407
}
408
if(not add_argument(getplugin(p_name), p)){
409
perror("add_argument");
410
return ARGP_ERR_UNKNOWN;
411
}
462
412
}
463
413
}
464
414
}
465
415
break;
466
case 'E': /* --env-for */
416
case 'f': /* --envs-for */
417
if(arg == NULL){
418
break;
419
}
467
420
{
468
421
char *envdef = strchr(arg, ':');
469
422
if(envdef == NULL){
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
472
break;
473
}
474
*envdef = '\0';
423
break;
424
}
425
char *p_name = strndup(arg, (size_t) (envdef-arg));
426
if(p_name == NULL){
427
break;
428
}
475
429
envdef++;
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
430
if(not add_environment(getplugin(p_name), envdef)){
431
perror("add_environment");
480
432
}
481
add_environment(getplugin(arg), envdef, true);
482
433
}
483
434
break;
484
435
case 'd': /* --disable */
485
{
486
plugin *p = getplugin(arg);
487
if(p != NULL){
488
p->disabled = true;
489
}
490
}
491
break;
492
case 'e': /* --enable */
493
{
494
plugin *p = getplugin(arg);
495
if(p != NULL){
496
p->disabled = false;
497
}
436
if (arg != NULL){
437
plugin *p = getplugin(arg);
438
if(p == NULL){
439
return ARGP_ERR_UNKNOWN;
440
}
441
p->disabled = true;
498
442
}
499
443
break;
500
444
case 128: /* --plugin-dir */
501
free(plugindir);
502
445
plugindir = strdup(arg);
446
if(plugindir == NULL){
447
perror("strdup");
448
}
503
449
break;
504
450
case 129: /* --config-file */
505
/* This is already done by parse_opt_config_file() */
506
break;
451
argfile = strdup(arg);
452
if(argfile == NULL){
453
perror("strdup");
454
}
455
break;
507
456
case 130: /* --userid */
508
tmp_id = strtoimax(arg, &tmp, 10);
509
if(errno != 0 or tmp == arg or *tmp != '\0'
510
or tmp_id != (uid_t)tmp_id){
511
argp_error(state, "Bad user ID number: \"%s\", using %"
512
PRIdMAX, arg, (intmax_t)uid);
513
break;
514
}
515
uid = (uid_t)tmp_id;
457
uid = (uid_t)strtol(arg, NULL, 10);
516
458
break;
517
459
case 131: /* --groupid */
518
tmp_id = strtoimax(arg, &tmp, 10);
519
if(errno != 0 or tmp == arg or *tmp != '\0'
520
or tmp_id != (gid_t)tmp_id){
521
argp_error(state, "Bad group ID number: \"%s\", using %"
522
PRIdMAX, arg, (intmax_t)gid);
523
break;
524
}
525
gid = (gid_t)tmp_id;
460
gid = (gid_t)strtol(arg, NULL, 10);
526
461
break;
527
462
case 132: /* --debug */
528
463
debug = true;
529
464
break;
530
/*
531
* These reproduce what we would get without ARGP_NO_HELP
532
*/
533
case '?': /* --help */
534
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
535
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
536
case -3: /* --usage */
537
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
538
argp_state_help(state, state->out_stream,
539
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
540
case 'V': /* --version */
541
fprintf(state->out_stream, "%s\n", argp_program_version);
542
exit(EXIT_SUCCESS);
543
break;
544
/*
545
* When adding more options before this line, remember to also add a
546
* "case" to the "parse_opt_config_file" function below.
547
*/
548
case ARGP_KEY_ARG:
549
/* Cryptsetup always passes an argument, which is an empty
550
string if "none" was specified in /etc/crypttab. So if
551
argument was empty, we ignore it silently. */
552
if(arg[0] == '\0'){
553
break;
554
}
555
default:
556
return ARGP_ERR_UNKNOWN;
557
}
558
return errno; /* Set to 0 at start */
559
}
560
561
/* This option parser is the same as parse_opt() above, except it
562
ignores everything but the --config-file option. */
563
error_t parse_opt_config_file(int key, char *arg,
564
__attribute__((unused))
565
struct argp_state *state){
566
errno = 0;
567
switch(key){
568
case 'g': /* --global-options */
569
case 'G': /* --global-env */
570
case 'o': /* --options-for */
571
case 'E': /* --env-for */
572
case 'd': /* --disable */
573
case 'e': /* --enable */
574
case 128: /* --plugin-dir */
575
break;
576
case 129: /* --config-file */
577
free(argfile);
578
argfile = strdup(arg);
579
break;
580
case 130: /* --userid */
581
case 131: /* --groupid */
582
case 132: /* --debug */
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
586
case ARGP_KEY_ARG:
587
break;
588
default:
589
return ARGP_ERR_UNKNOWN;
590
}
591
return errno;
592
}
593
594
struct argp argp = { .options = options,
595
.parser = parse_opt_config_file,
596
.args_doc = "",
465
case ARGP_KEY_ARG:
466
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
467
break;
468
case ARGP_KEY_END:
469
break;
470
default:
471
return ARGP_ERR_UNKNOWN;
472
}
473
return 0;
474
}
475
476
struct argp argp = { .options = options, .parser = parse_opt,
477
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
597
478
.doc = "Mandos plugin runner -- Run plugins" };
598
479
599
/* Parse using parse_opt_config_file() in order to get the custom
600
config file location, if any. */
601
ret = argp_parse(&argp, argc, argv,
602
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
603
NULL, NULL);
604
switch(ret){
605
case 0:
606
break;
607
case ENOMEM:
608
default:
609
errno = ret;
610
error(0, errno, "argp_parse");
611
exitstatus = EX_OSERR;
612
goto fallback;
613
case EINVAL:
614
exitstatus = EX_USAGE;
480
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
481
if (ret == ARGP_ERR_UNKNOWN){
482
fprintf(stderr, "Unknown error while parsing arguments\n");
483
exitstatus = EXIT_FAILURE;
615
484
goto fallback;
616
485
}
617
618
/* Reset to the normal argument parser */
619
argp.parser = parse_opt;
620
621
/* Open the configfile if available */
622
if(argfile == NULL){
486
487
/* Opens the configfile if aviable */
488
if (argfile == NULL){
623
489
conffp = fopen(AFILE, "r");
624
490
} else {
625
491
conffp = fopen(argfile, "r");
626
}
492
}
627
493
if(conffp != NULL){
628
494
char *org_line = NULL;
629
495
char *p, *arg, *new_arg, *line;
630
496
size_t size = 0;
497
ssize_t sret;
631
498
const char whitespace_delims[] = " \r\t\f\v\n";
632
499
const char comment_delim[] = "#";
633
500
634
501
custom_argc = 1;
635
502
custom_argv = malloc(sizeof(char*) * 2);
636
503
if(custom_argv == NULL){
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
504
perror("malloc");
505
exitstatus = EXIT_FAILURE;
639
506
goto fallback;
640
507
}
641
508
custom_argv[0] = argv[0];
642
509
custom_argv[1] = NULL;
643
510
644
511
/* for each line in the config file, strip whitespace and ignore
645
512
commented text */
646
513
while(true){
648
515
if(sret == -1){
649
516
break;
650
517
}
651
518
652
519
line = org_line;
653
520
arg = strsep(&line, comment_delim);
654
521
while((p = strsep(&arg, whitespace_delims)) != NULL){
657
524
}
658
525
new_arg = strdup(p);
659
526
if(new_arg == NULL){
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
527
perror("strdup");
528
exitstatus = EXIT_FAILURE;
662
529
free(org_line);
663
530
goto fallback;
664
531
}
667
534
custom_argv = realloc(custom_argv, sizeof(char *)
668
535
* ((unsigned int) custom_argc + 1));
669
536
if(custom_argv == NULL){
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
537
perror("realloc");
538
exitstatus = EXIT_FAILURE;
672
539
free(org_line);
673
540
goto fallback;
674
541
}
675
542
custom_argv[custom_argc-1] = new_arg;
676
custom_argv[custom_argc] = NULL;
543
custom_argv[custom_argc] = NULL;
677
544
}
678
545
}
679
do {
680
ret = fclose(conffp);
681
} while(ret == EOF and errno == EINTR);
682
if(ret == EOF){
683
error(0, errno, "fclose");
684
exitstatus = EX_IOERR;
685
goto fallback;
686
}
687
546
free(org_line);
688
} else {
547
} else{
689
548
/* Check for harmful errors and go to fallback. Other errors might
690
549
not affect opening plugins */
691
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
550
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
551
perror("fopen");
552
exitstatus = EXIT_FAILURE;
694
553
goto fallback;
695
554
}
696
555
}
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
556
/* If there was any arguments from configuration file,
557
pass them to parser as command arguments */
699
558
if(custom_argv != NULL){
700
ret = argp_parse(&argp, custom_argc, custom_argv,
701
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
702
NULL, NULL);
703
switch(ret){
704
case 0:
705
break;
706
case ENOMEM:
707
default:
708
errno = ret;
709
error(0, errno, "argp_parse");
710
exitstatus = EX_OSERR;
711
goto fallback;
712
case EINVAL:
713
exitstatus = EX_CONFIG;
559
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
560
if (ret == ARGP_ERR_UNKNOWN){
561
fprintf(stderr, "Unknown error while parsing arguments\n");
562
exitstatus = EXIT_FAILURE;
714
563
goto fallback;
715
564
}
716
565
}
717
566
718
/* Parse actual command line arguments, to let them override the
719
config file */
720
ret = argp_parse(&argp, argc, argv,
721
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
722
NULL, NULL);
723
switch(ret){
724
case 0:
725
break;
726
case ENOMEM:
727
default:
728
errno = ret;
729
error(0, errno, "argp_parse");
730
exitstatus = EX_OSERR;
731
goto fallback;
732
case EINVAL:
733
exitstatus = EX_USAGE;
734
goto fallback;
735
}
736
737
567
if(debug){
738
568
for(plugin *p = plugin_list; p != NULL; p=p->next){
739
569
fprintf(stderr, "Plugin: %s has %d arguments\n",
741
571
for(char **a = p->argv; *a != NULL; a++){
742
572
fprintf(stderr, "\tArg: %s\n", *a);
743
573
}
744
fprintf(stderr, "...and %d environment variables\n", p->envc);
574
fprintf(stderr, "...and %u environment variables\n", p->envc);
745
575
for(char **a = p->environ; *a != NULL; a++){
746
576
fprintf(stderr, "\t%s\n", *a);
747
577
}
748
578
}
749
579
}
750
751
if(getuid() == 0){
752
/* Work around Debian bug #633582:
753
<http://bugs.debian.org/633582> */
754
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
755
if(plugindir_fd == -1){
756
error(0, errno, "open");
757
} else {
758
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
759
if(ret == -1){
760
error(0, errno, "fstat");
761
} else {
762
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
763
ret = fchown(plugindir_fd, uid, gid);
764
if(ret == -1){
765
error(0, errno, "fchown");
766
}
767
}
768
}
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
770
}
771
}
772
773
/* Lower permissions */
774
ret = setgid(gid);
775
if(ret == -1){
776
error(0, errno, "setgid");
777
}
580
581
/* Strip permissions down to nobody */
778
582
ret = setuid(uid);
779
if(ret == -1){
780
error(0, errno, "setuid");
781
}
782
783
/* Open plugin directory with close_on_exec flag */
583
if (ret == -1){
584
perror("setuid");
585
}
586
setgid(gid);
587
if (ret == -1){
588
perror("setgid");
589
}
590
591
if (plugindir == NULL){
592
dir = opendir(PDIR);
593
} else {
594
dir = opendir(plugindir);
595
}
596
597
if(dir == NULL){
598
perror("Could not open plugin dir");
599
exitstatus = EXIT_FAILURE;
600
goto fallback;
601
}
602
603
/* Set the FD_CLOEXEC flag on the directory, if possible */
784
604
{
785
int dir_fd = -1;
786
if(plugindir == NULL){
787
dir_fd = open(PDIR, O_RDONLY |
788
#ifdef O_CLOEXEC
789
O_CLOEXEC
790
#else /* not O_CLOEXEC */
791
0
792
#endif /* not O_CLOEXEC */
793
);
794
} else {
795
dir_fd = open(plugindir, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
}
803
if(dir_fd == -1){
804
error(0, errno, "Could not open plugin dir");
805
exitstatus = EX_UNAVAILABLE;
806
goto fallback;
807
}
808
809
#ifndef O_CLOEXEC
810
/* Set the FD_CLOEXEC flag on the directory */
811
ret = set_cloexec_flag(dir_fd);
812
if(ret < 0){
813
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
815
exitstatus = EX_OSERR;
816
goto fallback;
817
}
818
#endif /* O_CLOEXEC */
819
820
dir = fdopendir(dir_fd);
821
if(dir == NULL){
822
error(0, errno, "Could not open plugin dir");
823
TEMP_FAILURE_RETRY(close(dir_fd));
824
exitstatus = EX_OSERR;
825
goto fallback;
605
int dir_fd = dirfd(dir);
606
if(dir_fd >= 0){
607
ret = set_cloexec_flag(dir_fd);
608
if(ret < 0){
609
perror("set_cloexec_flag");
610
exitstatus = EXIT_FAILURE;
611
goto fallback;
612
}
826
613
}
827
614
}
828
615
829
616
FD_ZERO(&rfds_all);
830
617
831
618
/* Read and execute any executable in the plugin directory*/
832
619
while(true){
833
do {
834
dirst = readdir(dir);
835
} while(dirst == NULL and errno == EINTR);
620
dirst = readdir(dir);
836
621
837
/* All directory entries have been processed */
622
// All directory entries have been processed
838
623
if(dirst == NULL){
839
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
624
if (errno == EBADF){
625
perror("readdir");
626
exitstatus = EXIT_FAILURE;
842
627
goto fallback;
843
628
}
844
629
break;
846
631
847
632
d_name_len = strlen(dirst->d_name);
848
633
849
/* Ignore dotfiles, backup files and other junk */
634
// Ignore dotfiles, backup files and other junk
850
635
{
851
636
bool bad_name = false;
852
637
854
639
855
640
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
856
641
".dpkg-old",
857
".dpkg-bak",
858
642
".dpkg-divert", NULL };
859
643
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
860
644
size_t pre_len = strlen(*pre);
874
658
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
875
659
size_t suf_len = strlen(*suf);
876
660
if((d_name_len >= suf_len)
877
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
661
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
878
662
== 0)){
879
663
if(debug){
880
664
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
673
continue;
890
674
}
891
675
}
892
676
893
677
char *filename;
894
if(plugindir == NULL){
895
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
896
dirst->d_name));
897
} else {
898
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
899
plugindir,
900
dirst->d_name));
901
}
678
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
902
679
if(ret < 0){
903
error(0, errno, "asprintf");
680
perror("asprintf");
904
681
continue;
905
682
}
906
683
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
908
if(ret == -1){
909
error(0, errno, "stat");
684
ret = stat(filename, &st);
685
if (ret == -1){
686
perror("stat");
910
687
free(filename);
911
688
continue;
912
689
}
913
690
914
691
/* Ignore non-executable files */
915
if(not S_ISREG(st.st_mode)
916
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
692
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
917
693
if(debug){
918
694
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
919
695
" with bad type or mode\n", filename);
924
700
925
701
plugin *p = getplugin(dirst->d_name);
926
702
if(p == NULL){
927
error(0, errno, "getplugin");
703
perror("getplugin");
928
704
free(filename);
929
705
continue;
930
706
}
942
718
if(g != NULL){
943
719
for(char **a = g->argv + 1; *a != NULL; a++){
944
720
if(not add_argument(p, *a)){
945
error(0, errno, "add_argument");
721
perror("add_argument");
946
722
}
947
723
}
948
724
/* Add global environment variables */
949
725
for(char **e = g->environ; *e != NULL; e++){
950
if(not add_environment(p, *e, false)){
951
error(0, errno, "add_environment");
726
if(not add_environment(p, *e)){
727
perror("add_environment");
952
728
}
953
729
}
954
730
}
958
734
process, too. */
959
735
if(p->environ[0] != NULL){
960
736
for(char **e = environ; *e != NULL; e++){
961
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
737
char *copy = strdup(*e);
738
if(copy == NULL){
739
perror("strdup");
740
continue;
741
}
742
if(not add_environment(p, copy)){
743
perror("add_environment");
963
744
}
964
745
}
965
746
}
966
747
967
748
int pipefd[2];
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
969
if(ret == -1){
970
error(0, errno, "pipe");
971
exitstatus = EX_OSERR;
749
ret = pipe(pipefd);
750
if (ret == -1){
751
perror("pipe");
752
exitstatus = EXIT_FAILURE;
972
753
goto fallback;
973
754
}
974
755
/* Ask OS to automatic close the pipe on exec */
975
756
ret = set_cloexec_flag(pipefd[0]);
976
757
if(ret < 0){
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
758
perror("set_cloexec_flag");
759
exitstatus = EXIT_FAILURE;
979
760
goto fallback;
980
761
}
981
762
ret = set_cloexec_flag(pipefd[1]);
982
763
if(ret < 0){
983
error(0, errno, "set_cloexec_flag");
984
exitstatus = EX_OSERR;
764
perror("set_cloexec_flag");
765
exitstatus = EXIT_FAILURE;
985
766
goto fallback;
986
767
}
987
768
/* Block SIGCHLD until process is safely in process list */
988
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
989
&sigchld_action.sa_mask,
990
NULL));
769
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
991
770
if(ret < 0){
992
error(0, errno, "sigprocmask");
993
exitstatus = EX_OSERR;
771
perror("sigprocmask");
772
exitstatus = EXIT_FAILURE;
994
773
goto fallback;
995
774
}
996
/* Starting a new process to be watched */
997
pid_t pid;
998
do {
999
pid = fork();
1000
} while(pid == -1 and errno == EINTR);
775
// Starting a new process to be watched
776
pid_t pid = fork();
1001
777
if(pid == -1){
1002
error(0, errno, "fork");
1003
exitstatus = EX_OSERR;
778
perror("fork");
779
exitstatus = EXIT_FAILURE;
1004
780
goto fallback;
1005
781
}
1006
782
if(pid == 0){
1007
783
/* this is the child process */
1008
784
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1009
785
if(ret < 0){
1010
error(0, errno, "sigaction");
1011
_exit(EX_OSERR);
786
perror("sigaction");
787
_exit(EXIT_FAILURE);
1012
788
}
1013
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
789
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1014
790
if(ret < 0){
1015
error(0, errno, "sigprocmask");
1016
_exit(EX_OSERR);
791
perror("sigprocmask");
792
_exit(EXIT_FAILURE);
1017
793
}
1018
794
1019
795
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1020
796
if(ret == -1){
1021
error(0, errno, "dup2");
1022
_exit(EX_OSERR);
797
perror("dup2");
798
_exit(EXIT_FAILURE);
1023
799
}
1024
800
1025
801
if(dirfd(dir) < 0){
1029
805
}
1030
806
if(p->environ[0] == NULL){
1031
807
if(execv(filename, p->argv) < 0){
1032
error(0, errno, "execv for %s", filename);
1033
_exit(EX_OSERR);
808
perror("execv");
809
_exit(EXIT_FAILURE);
1034
810
}
1035
811
} else {
1036
812
if(execve(filename, p->argv, p->environ) < 0){
1037
error(0, errno, "execve for %s", filename);
1038
_exit(EX_OSERR);
813
perror("execve");
814
_exit(EXIT_FAILURE);
1039
815
}
1040
816
}
1041
817
/* no return */
1042
818
}
1043
819
/* Parent process */
1044
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1045
pipe */
820
close(pipefd[1]); /* Close unused write end of pipe */
1046
821
free(filename);
1047
822
plugin *new_plugin = getplugin(dirst->d_name);
1048
if(new_plugin == NULL){
1049
error(0, errno, "getplugin");
1050
ret = (int)(TEMP_FAILURE_RETRY
1051
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1052
NULL)));
823
if (new_plugin == NULL){
824
perror("getplugin");
825
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1053
826
if(ret < 0){
1054
error(0, errno, "sigprocmask");
827
perror("sigprocmask");
1055
828
}
1056
exitstatus = EX_OSERR;
829
exitstatus = EXIT_FAILURE;
1057
830
goto fallback;
1058
831
}
1059
832
1062
835
1063
836
/* Unblock SIGCHLD so signal handler can be run if this process
1064
837
has already completed */
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1066
&sigchld_action.sa_mask,
1067
NULL));
838
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1068
839
if(ret < 0){
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
840
perror("sigprocmask");
841
exitstatus = EXIT_FAILURE;
1071
842
goto fallback;
1072
843
}
1073
844
1074
#if defined (__GNUC__) and defined (__GLIBC__)
1075
#if not __GLIBC_PREREQ(2, 16)
1076
#pragma GCC diagnostic push
1077
#pragma GCC diagnostic ignored "-Wsign-conversion"
1078
#endif
1079
#endif
1080
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1081
-Wconversion in GNU libc
1082
before 2.16 */
1083
#if defined (__GNUC__) and defined (__GLIBC__)
1084
#if not __GLIBC_PREREQ(2, 16)
1085
#pragma GCC diagnostic pop
1086
#endif
1087
#endif
845
FD_SET(new_plugin->fd, &rfds_all);
1088
846
1089
if(maxfd < new_plugin->fd){
847
if (maxfd < new_plugin->fd){
1090
848
maxfd = new_plugin->fd;
1091
849
}
850
1092
851
}
1093
852
1094
TEMP_FAILURE_RETRY(closedir(dir));
853
closedir(dir);
1095
854
dir = NULL;
1096
free_plugin(getplugin(NULL));
1097
855
1098
856
for(plugin *p = plugin_list; p != NULL; p = p->next){
1099
857
if(p->pid != 0){
1100
858
break;
1105
863
free_plugin_list();
1106
864
}
1107
865
}
1108
866
1109
867
/* Main loop while running plugins exist */
1110
868
while(plugin_list){
1111
869
fd_set rfds = rfds_all;
1112
870
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1113
if(select_ret == -1 and errno != EINTR){
1114
error(0, errno, "select");
1115
exitstatus = EX_OSERR;
871
if (select_ret == -1){
872
perror("select");
873
exitstatus = EXIT_FAILURE;
1116
874
goto fallback;
1117
875
}
1118
876
/* OK, now either a process completed, or something can be read
1119
877
from one of them */
1120
for(plugin *proc = plugin_list; proc != NULL;){
878
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1121
879
/* Is this process completely done? */
1122
if(proc->completed and proc->eof){
880
if(proc->eof and proc->completed){
1123
881
/* Only accept the plugin output if it exited cleanly */
1124
882
if(not WIFEXITED(proc->status)
1125
883
or WEXITSTATUS(proc->status) != 0){
1126
884
/* Bad exit by plugin */
1127
885
1128
886
if(debug){
1129
887
if(WIFEXITED(proc->status)){
1130
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1131
" status %d\n", proc->name,
1132
(intmax_t) (proc->pid),
888
fprintf(stderr, "Plugin %u exited with status %d\n",
889
(unsigned int) (proc->pid),
1133
890
WEXITSTATUS(proc->status));
1134
} else if(WIFSIGNALED(proc->status)){
1135
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1136
" signal %d: %s\n", proc->name,
1137
(intmax_t) (proc->pid),
1138
WTERMSIG(proc->status),
1139
strsignal(WTERMSIG(proc->status)));
891
} else if(WIFSIGNALED(proc->status)) {
892
fprintf(stderr, "Plugin %u killed by signal %d\n",
893
(unsigned int) (proc->pid),
894
WTERMSIG(proc->status));
1140
895
} else if(WCOREDUMP(proc->status)){
1141
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1142
" core\n", proc->name, (intmax_t) (proc->pid));
896
fprintf(stderr, "Plugin %d dumped core\n",
897
(unsigned int) (proc->pid));
1143
898
}
1144
899
}
1145
900
1146
901
/* Remove the plugin */
1147
#if defined (__GNUC__) and defined (__GLIBC__)
1148
#if not __GLIBC_PREREQ(2, 16)
1149
#pragma GCC diagnostic push
1150
#pragma GCC diagnostic ignored "-Wsign-conversion"
1151
#endif
1152
#endif
1153
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1154
-Wconversion in GNU libc
1155
before 2.16 */
1156
#if defined (__GNUC__) and defined (__GLIBC__)
1157
#if not __GLIBC_PREREQ(2, 16)
1158
#pragma GCC diagnostic pop
1159
#endif
1160
#endif
1161
902
FD_CLR(proc->fd, &rfds_all);
903
1162
904
/* Block signal while modifying process_list */
1163
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1164
(SIG_BLOCK,
1165
&sigchld_action.sa_mask,
1166
NULL));
905
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1167
906
if(ret < 0){
1168
error(0, errno, "sigprocmask");
1169
exitstatus = EX_OSERR;
907
perror("sigprocmask");
908
exitstatus = EXIT_FAILURE;
1170
909
goto fallback;
1171
910
}
1172
1173
plugin *next_plugin = proc->next;
1174
911
free_plugin(proc);
1175
proc = next_plugin;
1176
1177
912
/* We are done modifying process list, so unblock signal */
1178
ret = (int)(TEMP_FAILURE_RETRY
1179
(sigprocmask(SIG_UNBLOCK,
1180
&sigchld_action.sa_mask, NULL)));
913
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
914
NULL);
1181
915
if(ret < 0){
1182
error(0, errno, "sigprocmask");
1183
exitstatus = EX_OSERR;
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1184
918
goto fallback;
1185
919
}
1186
920
1187
921
if(plugin_list == NULL){
1188
922
break;
1189
923
}
1190
1191
924
continue;
1192
925
}
1193
926
1194
927
/* This process exited nicely, so print its buffer */
1195
928
1196
929
bool bret = print_out_password(proc->buffer,
1197
930
proc->buffer_length);
1198
931
if(not bret){
1199
error(0, errno, "print_out_password");
1200
exitstatus = EX_IOERR;
932
perror("print_out_password");
933
exitstatus = EXIT_FAILURE;
1201
934
}
1202
935
goto fallback;
1203
936
}
1204
937
1205
938
/* This process has not completed. Does it have any output? */
1206
#if defined (__GNUC__) and defined (__GLIBC__)
1207
#if not __GLIBC_PREREQ(2, 16)
1208
#pragma GCC diagnostic push
1209
#pragma GCC diagnostic ignored "-Wsign-conversion"
1210
#endif
1211
#endif
1212
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1213
warning from
1214
-Wconversion
1215
in GNU libc
1216
before
1217
2.16 */
1218
#if defined (__GNUC__) and defined (__GLIBC__)
1219
#if not __GLIBC_PREREQ(2, 16)
1220
#pragma GCC diagnostic pop
1221
#endif
1222
#endif
939
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1223
940
/* This process had nothing to say at this time */
1224
proc = proc->next;
1225
941
continue;
1226
942
}
1227
943
/* Before reading, make the process' data buffer large enough */
1228
944
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1229
945
proc->buffer = realloc(proc->buffer, proc->buffer_size
1230
946
+ (size_t) BUFFER_SIZE);
1231
if(proc->buffer == NULL){
1232
error(0, errno, "malloc");
1233
exitstatus = EX_OSERR;
947
if (proc->buffer == NULL){
948
perror("malloc");
949
exitstatus = EXIT_FAILURE;
1234
950
goto fallback;
1235
951
}
1236
952
proc->buffer_size += BUFFER_SIZE;
1237
953
}
1238
954
/* Read from the process */
1239
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1240
proc->buffer
1241
+ proc->buffer_length,
1242
BUFFER_SIZE));
1243
if(sret < 0){
955
ret = read(proc->fd, proc->buffer + proc->buffer_length,
956
BUFFER_SIZE);
957
if(ret < 0){
1244
958
/* Read error from this process; ignore the error */
1245
proc = proc->next;
1246
959
continue;
1247
960
}
1248
if(sret == 0){
961
if(ret == 0){
1249
962
/* got EOF */
1250
963
proc->eof = true;
1251
964
} else {
1252
proc->buffer_length += (size_t) sret;
965
proc->buffer_length += (size_t) ret;
1253
966
}
1254
967
}
1255
968
}
1256
1257
969
970
1258
971
fallback:
1259
972
1260
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1261
and exitstatus != EX_OK)){
973
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1262
974
/* Fallback if all plugins failed, none are found or an error
1263
975
occured */
1264
976
bool bret;
1265
977
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1266
978
char *passwordbuffer = getpass("Password: ");
1267
size_t len = strlen(passwordbuffer);
1268
/* Strip trailing newline */
1269
if(len > 0 and passwordbuffer[len-1] == '\n'){
1270
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1271
len--;
1272
}
1273
bret = print_out_password(passwordbuffer, len);
979
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1274
980
if(not bret){
1275
error(0, errno, "print_out_password");
1276
exitstatus = EX_IOERR;
981
perror("print_out_password");
982
exitstatus = EXIT_FAILURE;
1277
983
}
1278
984
}
1279
985
1280
986
/* Restore old signal handler */
1281
987
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1282
988
if(ret == -1){
1283
error(0, errno, "sigaction");
1284
exitstatus = EX_OSERR;
989
perror("sigaction");
990
exitstatus = EXIT_FAILURE;
1285
991
}
1286
992
1287
993
if(custom_argv != NULL){
1288
994
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1289
995
free(*arg);
1295
1001
closedir(dir);
1296
1002
}
1297
1003
1298
/* Kill the processes */
1004
/* Free the process list and kill the processes */
1299
1005
for(plugin *p = plugin_list; p != NULL; p = p->next){
1300
1006
if(p->pid != 0){
1301
1007
close(p->fd);
1302
1008
ret = kill(p->pid, SIGTERM);
1303
1009
if(ret == -1 and errno != ESRCH){
1304
1010
/* Set-uid proccesses might not get closed */
1305
error(0, errno, "kill");
1011
perror("kill");
1306
1012
}
1307
1013
}
1308
1014
}
1309
1015
1310
1016
/* Wait for any remaining child processes to terminate */
1311
do {
1017
do{
1312
1018
ret = wait(NULL);
1313
1019
} while(ret >= 0);
1314
1020
if(errno != ECHILD){
1315
error(0, errno, "wait");
1021
perror("wait");
1316
1022
}
1317
1023
1318
1024
free_plugin_list();
1319
1025
1320
1026
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0