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- Committer: Teddy Hogeborn
- Date: 2014-03-10 06:34:36 UTC
- Revision ID: teddy@recompile.se-20140310063436-zksdghqvv6k1pbyg
Do not add a new server to server list if clock_gettime() fails
* plugins.d/mandos-client.c (add_server): Set server.last_seen before
adding new server, in case
clock_gettime() fails.
* plugins.d/mandos-client.c (add_server): Set server.last_seen before
adding new server, in case
clock_gettime() fails.
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files removed:
- plugins.d/usplash
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 Björn Påhlsson
6
7
*
7
8
* This program is free software: you can redistribute it and/or
8
9
* modify it under the terms of the GNU General Public License as
18
19
* along with this program. If not, see
19
20
* <http://www.gnu.org/licenses/>.
20
21
*
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
22
23
*/
23
24
24
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
26
asprintf(), O_CLOEXEC */
26
27
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
35
36
uid_t, gid_t, getuid(), getgid(),
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
46
readdir(), closedir(), dirfd() */
45
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
48
fcntl(), setuid(), setgid(),
47
49
F_GETFD, F_SETFD, FD_CLOEXEC,
48
50
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
51
dup2(), STDOUT_FILENO, _exit(),
50
52
execv(), write(), read(),
51
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
55
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
61
64
#include <signal.h> /* struct sigaction, sigemptyset(),
62
65
sigaddset(), sigaction(),
63
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
66
75
67
76
#define BUFFER_SIZE 256
68
77
69
78
#define PDIR "/lib/mandos/plugins.d"
70
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
80
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;
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
83
77
84
typedef struct plugin{
78
85
char *name; /* can be NULL or any plugin name */
81
88
char **environ;
82
89
int envc;
83
90
bool disabled;
84
91
85
92
/* Variables used for running processes*/
86
93
pid_t pid;
87
94
int fd;
89
96
size_t buffer_size;
90
97
size_t buffer_length;
91
98
bool eof;
92
volatile bool completed;
93
volatile int status;
99
volatile sig_atomic_t completed;
100
int status;
94
101
struct plugin *next;
95
102
} plugin;
96
103
97
104
static plugin *plugin_list = NULL;
98
105
99
/* Gets a existing plugin based on name,
106
/* Gets an existing plugin based on name,
100
107
or if none is found, creates a new one */
101
108
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
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))){
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))){
106
113
return p;
107
114
}
108
115
}
109
116
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
117
plugin *new_plugin = NULL;
118
do {
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
121
if(new_plugin == NULL){
112
122
return NULL;
113
123
}
114
124
char *copy_name = NULL;
115
125
if(name != NULL){
116
copy_name = strdup(name);
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
117
129
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
118
133
return NULL;
119
134
}
120
135
}
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){
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;
129
147
free(copy_name);
130
148
free(new_plugin);
149
errno = e;
131
150
return NULL;
132
151
}
133
152
new_plugin->argv[0] = copy_name;
134
153
new_plugin->argv[1] = NULL;
135
154
136
new_plugin->environ = malloc(sizeof(char *));
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
137
158
if(new_plugin->environ == NULL){
159
int e = errno;
138
160
free(copy_name);
139
161
free(new_plugin->argv);
140
162
free(new_plugin);
163
errno = e;
141
164
return NULL;
142
165
}
143
166
new_plugin->environ[0] = NULL;
148
171
}
149
172
150
173
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
151
175
static bool add_to_char_array(const char *new, char ***array,
152
176
int *len){
153
177
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
178
char **new_array = NULL;
179
do {
180
new_array = realloc(*array, sizeof(char *)
181
* (size_t) ((*len) + 2));
182
} while(new_array == NULL and errno == EINTR);
156
183
/* Malloc check */
157
if(*array == NULL){
184
if(new_array == NULL){
158
185
return false;
159
186
}
187
*array = new_array;
160
188
/* Make a copy of the new string */
161
char *copy = strdup(new);
189
char *copy;
190
do {
191
copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
162
193
if(copy == NULL){
163
194
return false;
164
195
}
171
202
}
172
203
173
204
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
174
206
static bool add_argument(plugin *p, const char *arg){
175
207
if(p == NULL){
176
208
return false;
179
211
}
180
212
181
213
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def){
214
__attribute__((nonnull(2)))
215
static bool add_environment(plugin *p, const char *def, bool replace){
183
216
if(p == NULL){
184
217
return false;
185
218
}
186
219
/* namelen = length of name of environment variable */
187
220
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
221
/* Search for this environment variable */
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen+1) == 0){
191
/* Refuse to add an existing variable */
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
224
/* It already exists */
225
if(replace){
226
char *new_envdef;
227
do {
228
new_envdef = realloc(*envdef, strlen(def) + 1);
229
} while(new_envdef == NULL and errno == EINTR);
230
if(new_envdef == NULL){
231
return false;
232
}
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
235
}
192
236
return true;
193
237
}
194
238
}
198
242
/*
199
243
* Based on the example in the GNU LibC manual chapter 13.13 "File
200
244
* Descriptor Flags".
201
* *Note File Descriptor Flags:(libc)Descriptor Flags.
245
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
202
246
*/
203
static int set_cloexec_flag(int fd)
204
{
205
int ret = fcntl(fd, F_GETFD, 0);
247
static int set_cloexec_flag(int fd){
248
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
206
249
/* If reading the flags failed, return error indication now. */
207
250
if(ret < 0){
208
251
return ret;
209
252
}
210
253
/* Store modified flag word in the descriptor. */
211
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
254
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
255
ret | FD_CLOEXEC));
212
256
}
213
257
214
258
215
259
/* Mark processes as completed when they exit, and save their exit
216
260
status. */
217
void handle_sigchld(__attribute__((unused)) int sig){
261
static void handle_sigchld(__attribute__((unused)) int sig){
262
int old_errno = errno;
218
263
while(true){
219
264
plugin *proc = plugin_list;
220
265
int status;
224
269
break;
225
270
}
226
271
if(pid == -1){
227
if (errno != ECHILD){
228
perror("waitpid");
272
if(errno == ECHILD){
273
/* No child processes */
274
break;
229
275
}
230
/* No child processes */
231
break;
276
error(0, errno, "waitpid");
232
277
}
233
278
234
279
/* A child exited, find it in process_list */
235
280
while(proc != NULL and proc->pid != pid){
236
281
proc = proc->next;
240
285
continue;
241
286
}
242
287
proc->status = status;
243
proc->completed = true;
288
proc->completed = 1;
244
289
}
290
errno = old_errno;
245
291
}
246
292
247
293
/* Prints out a password to stdout */
248
bool print_out_password(const char *buffer, size_t length){
294
__attribute__((nonnull))
295
static bool print_out_password(const char *buffer, size_t length){
249
296
ssize_t ret;
250
if(length>0 and buffer[length-1] == '\n'){
251
length--;
252
}
253
297
for(size_t written = 0; written < length; written += (size_t)ret){
254
298
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
255
299
length - written));
261
305
}
262
306
263
307
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
264
309
static void free_plugin(plugin *plugin_node){
265
310
266
311
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
272
317
}
273
318
free(plugin_node->environ);
274
319
free(plugin_node->buffer);
275
320
276
321
/* Removes the plugin from the singly-linked list */
277
322
if(plugin_node == plugin_list){
278
323
/* First one - simple */
306
351
struct stat st;
307
352
fd_set rfds_all;
308
353
int ret, maxfd = 0;
354
ssize_t sret;
309
355
uid_t uid = 65534;
310
356
gid_t gid = 65534;
311
357
bool debug = false;
320
366
sigemptyset(&sigchld_action.sa_mask);
321
367
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
322
368
if(ret == -1){
323
perror("sigaddset");
324
exitstatus = EXIT_FAILURE;
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
325
371
goto fallback;
326
372
}
327
373
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
328
374
if(ret == -1){
329
perror("sigaction");
330
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
331
377
goto fallback;
332
378
}
333
379
336
382
{ .name = "global-options", .key = 'g',
337
383
.arg = "OPTION[,OPTION[,...]]",
338
384
.doc = "Options passed to all plugins" },
339
{ .name = "global-env", .key = 'e',
385
{ .name = "global-env", .key = 'G',
340
386
.arg = "VAR=value",
341
387
.doc = "Environment variable passed to all plugins" },
342
388
{ .name = "options-for", .key = 'o',
343
389
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
344
390
.doc = "Options passed only to specified plugin" },
345
{ .name = "env-for", .key = 'f',
391
{ .name = "env-for", .key = 'E',
346
392
.arg = "PLUGIN:ENV=value",
347
393
.doc = "Environment variable passed to specified plugin" },
348
394
{ .name = "disable", .key = 'd',
349
395
.arg = "PLUGIN",
350
396
.doc = "Disable a specific plugin", .group = 1 },
397
{ .name = "enable", .key = 'e',
398
.arg = "PLUGIN",
399
.doc = "Enable a specific plugin", .group = 1 },
351
400
{ .name = "plugin-dir", .key = 128,
352
401
.arg = "DIRECTORY",
353
402
.doc = "Specify a different plugin directory", .group = 2 },
362
411
.doc = "Group ID the plugins will run as", .group = 3 },
363
412
{ .name = "debug", .key = 132,
364
413
.doc = "Debug mode", .group = 4 },
414
/*
415
* These reproduce what we would get without ARGP_NO_HELP
416
*/
417
{ .name = "help", .key = '?',
418
.doc = "Give this help list", .group = -1 },
419
{ .name = "usage", .key = -3,
420
.doc = "Give a short usage message", .group = -1 },
421
{ .name = "version", .key = 'V',
422
.doc = "Print program version", .group = -1 },
365
423
{ .name = NULL }
366
424
};
367
425
368
error_t parse_opt (int key, char *arg, __attribute__((unused))
369
struct argp_state *state) {
370
/* Get the INPUT argument from `argp_parse', which we know is a
371
pointer to our plugin list pointer. */
372
switch (key) {
426
__attribute__((nonnull(3)))
427
error_t parse_opt(int key, char *arg, struct argp_state *state){
428
errno = 0;
429
switch(key){
430
char *tmp;
431
intmax_t tmp_id;
373
432
case 'g': /* --global-options */
374
if (arg != NULL){
375
char *p;
376
while((p = strsep(&arg, ",")) != NULL){
377
if(p[0] == '\0'){
378
continue;
379
}
380
if(not add_argument(getplugin(NULL), p)){
381
perror("add_argument");
382
return ARGP_ERR_UNKNOWN;
383
}
384
}
385
}
386
break;
387
case 'e': /* --global-env */
388
if(arg == NULL){
389
break;
390
}
391
433
{
392
char *envdef = strdup(arg);
393
if(envdef == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), envdef)){
397
perror("add_environment");
434
char *plugin_option;
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
437
break;
438
}
398
439
}
399
440
}
400
441
break;
442
case 'G': /* --global-env */
443
add_environment(getplugin(NULL), arg, true);
444
break;
401
445
case 'o': /* --options-for */
402
if (arg != NULL){
403
char *p_name = strsep(&arg, ":");
404
if(p_name[0] == '\0'){
405
break;
406
}
407
char *opt = strsep(&arg, ":");
408
if(opt[0] == '\0'){
409
break;
410
}
411
if(opt != NULL){
412
char *p;
413
while((p = strsep(&opt, ",")) != NULL){
414
if(p[0] == '\0'){
415
continue;
416
}
417
if(not add_argument(getplugin(p_name), p)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
420
}
446
{
447
char *option_list = strchr(arg, ':');
448
if(option_list == NULL){
449
argp_error(state, "No colon in \"%s\"", arg);
450
errno = EINVAL;
451
break;
452
}
453
*option_list = '\0';
454
option_list++;
455
if(arg[0] == '\0'){
456
argp_error(state, "Empty plugin name");
457
errno = EINVAL;
458
break;
459
}
460
char *option;
461
while((option = strsep(&option_list, ",")) != NULL){
462
if(not add_argument(getplugin(arg), option)){
463
break;
421
464
}
422
465
}
423
466
}
424
467
break;
425
case 'f': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
468
case 'E': /* --env-for */
429
469
{
430
470
char *envdef = strchr(arg, ':');
431
471
if(envdef == NULL){
432
break;
433
}
434
char *p_name = strndup(arg, (size_t) (envdef-arg));
435
if(p_name == NULL){
436
break;
437
}
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
474
break;
475
}
476
*envdef = '\0';
438
477
envdef++;
439
if(not add_environment(getplugin(p_name), envdef)){
440
perror("add_environment");
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
441
482
}
483
add_environment(getplugin(arg), envdef, true);
442
484
}
443
485
break;
444
486
case 'd': /* --disable */
445
if (arg != NULL){
446
plugin *p = getplugin(arg);
447
if(p == NULL){
448
return ARGP_ERR_UNKNOWN;
449
}
450
p->disabled = true;
487
{
488
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = true;
491
}
492
}
493
break;
494
case 'e': /* --enable */
495
{
496
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = false;
499
}
451
500
}
452
501
break;
453
502
case 128: /* --plugin-dir */
503
free(plugindir);
454
504
plugindir = strdup(arg);
455
if(plugindir == NULL){
456
perror("strdup");
457
}
458
break;
459
case 129: /* --config-file */
505
break;
506
case 129: /* --config-file */
507
/* This is already done by parse_opt_config_file() */
508
break;
509
case 130: /* --userid */
510
tmp_id = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmp_id != (uid_t)tmp_id){
513
argp_error(state, "Bad user ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)uid);
515
break;
516
}
517
uid = (uid_t)tmp_id;
518
break;
519
case 131: /* --groupid */
520
tmp_id = strtoimax(arg, &tmp, 10);
521
if(errno != 0 or tmp == arg or *tmp != '\0'
522
or tmp_id != (gid_t)tmp_id){
523
argp_error(state, "Bad group ID number: \"%s\", using %"
524
PRIdMAX, arg, (intmax_t)gid);
525
break;
526
}
527
gid = (gid_t)tmp_id;
528
break;
529
case 132: /* --debug */
530
debug = true;
531
break;
532
/*
533
* These reproduce what we would get without ARGP_NO_HELP
534
*/
535
case '?': /* --help */
536
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
537
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
538
case -3: /* --usage */
539
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
540
argp_state_help(state, state->out_stream,
541
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
542
case 'V': /* --version */
543
fprintf(state->out_stream, "%s\n", argp_program_version);
544
exit(EXIT_SUCCESS);
545
break;
546
/*
547
* When adding more options before this line, remember to also add a
548
* "case" to the "parse_opt_config_file" function below.
549
*/
550
case ARGP_KEY_ARG:
551
/* Cryptsetup always passes an argument, which is an empty
552
string if "none" was specified in /etc/crypttab. So if
553
argument was empty, we ignore it silently. */
554
if(arg[0] == '\0'){
555
break;
556
}
557
default:
558
return ARGP_ERR_UNKNOWN;
559
}
560
return errno; /* Set to 0 at start */
561
}
562
563
/* This option parser is the same as parse_opt() above, except it
564
ignores everything but the --config-file option. */
565
error_t parse_opt_config_file(int key, char *arg,
566
__attribute__((unused))
567
struct argp_state *state){
568
errno = 0;
569
switch(key){
570
case 'g': /* --global-options */
571
case 'G': /* --global-env */
572
case 'o': /* --options-for */
573
case 'E': /* --env-for */
574
case 'd': /* --disable */
575
case 'e': /* --enable */
576
case 128: /* --plugin-dir */
577
break;
578
case 129: /* --config-file */
579
free(argfile);
460
580
argfile = strdup(arg);
461
if(argfile == NULL){
462
perror("strdup");
463
}
464
break;
581
break;
465
582
case 130: /* --userid */
466
uid = (uid_t)strtol(arg, NULL, 10);
467
break;
468
583
case 131: /* --groupid */
469
gid = (gid_t)strtol(arg, NULL, 10);
470
break;
471
584
case 132: /* --debug */
472
debug = true;
473
break;
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
474
588
case ARGP_KEY_ARG:
475
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
476
break;
477
case ARGP_KEY_END:
478
589
break;
479
590
default:
480
591
return ARGP_ERR_UNKNOWN;
481
592
}
482
return 0;
593
return errno;
483
594
}
484
595
485
struct argp argp = { .options = options, .parser = parse_opt,
486
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
596
struct argp argp = { .options = options,
597
.parser = parse_opt_config_file,
598
.args_doc = "",
487
599
.doc = "Mandos plugin runner -- Run plugins" };
488
600
489
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
490
if (ret == ARGP_ERR_UNKNOWN){
491
fprintf(stderr, "Unknown error while parsing arguments\n");
492
exitstatus = EXIT_FAILURE;
601
/* Parse using parse_opt_config_file() in order to get the custom
602
config file location, if any. */
603
ret = argp_parse(&argp, argc, argv,
604
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
605
NULL, NULL);
606
switch(ret){
607
case 0:
608
break;
609
case ENOMEM:
610
default:
611
errno = ret;
612
error(0, errno, "argp_parse");
613
exitstatus = EX_OSERR;
614
goto fallback;
615
case EINVAL:
616
exitstatus = EX_USAGE;
493
617
goto fallback;
494
618
}
495
496
/* Opens the configfile if aviable */
497
if (argfile == NULL){
619
620
/* Reset to the normal argument parser */
621
argp.parser = parse_opt;
622
623
/* Open the configfile if available */
624
if(argfile == NULL){
498
625
conffp = fopen(AFILE, "r");
499
626
} else {
500
627
conffp = fopen(argfile, "r");
501
}
628
}
502
629
if(conffp != NULL){
503
630
char *org_line = NULL;
504
631
char *p, *arg, *new_arg, *line;
505
632
size_t size = 0;
506
ssize_t sret;
507
633
const char whitespace_delims[] = " \r\t\f\v\n";
508
634
const char comment_delim[] = "#";
509
635
510
636
custom_argc = 1;
511
637
custom_argv = malloc(sizeof(char*) * 2);
512
638
if(custom_argv == NULL){
513
perror("malloc");
514
exitstatus = EXIT_FAILURE;
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
515
641
goto fallback;
516
642
}
517
643
custom_argv[0] = argv[0];
518
644
custom_argv[1] = NULL;
519
645
520
646
/* for each line in the config file, strip whitespace and ignore
521
647
commented text */
522
648
while(true){
524
650
if(sret == -1){
525
651
break;
526
652
}
527
653
528
654
line = org_line;
529
655
arg = strsep(&line, comment_delim);
530
656
while((p = strsep(&arg, whitespace_delims)) != NULL){
533
659
}
534
660
new_arg = strdup(p);
535
661
if(new_arg == NULL){
536
perror("strdup");
537
exitstatus = EXIT_FAILURE;
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
538
664
free(org_line);
539
665
goto fallback;
540
666
}
541
667
542
668
custom_argc += 1;
543
custom_argv = realloc(custom_argv, sizeof(char *)
544
* ((unsigned int) custom_argc + 1));
545
if(custom_argv == NULL){
546
perror("realloc");
547
exitstatus = EXIT_FAILURE;
548
free(org_line);
549
goto fallback;
669
{
670
char **new_argv = realloc(custom_argv, sizeof(char *)
671
* ((unsigned int)
672
custom_argc + 1));
673
if(new_argv == NULL){
674
error(0, errno, "realloc");
675
exitstatus = EX_OSERR;
676
free(new_arg);
677
free(org_line);
678
goto fallback;
679
} else {
680
custom_argv = new_argv;
681
}
550
682
}
551
683
custom_argv[custom_argc-1] = new_arg;
552
custom_argv[custom_argc] = NULL;
684
custom_argv[custom_argc] = NULL;
553
685
}
554
686
}
687
do {
688
ret = fclose(conffp);
689
} while(ret == EOF and errno == EINTR);
690
if(ret == EOF){
691
error(0, errno, "fclose");
692
exitstatus = EX_IOERR;
693
goto fallback;
694
}
555
695
free(org_line);
556
} else{
696
} else {
557
697
/* Check for harmful errors and go to fallback. Other errors might
558
698
not affect opening plugins */
559
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
560
perror("fopen");
561
exitstatus = EXIT_FAILURE;
699
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
562
702
goto fallback;
563
703
}
564
704
}
565
/* If there was any arguments from configuration file,
566
pass them to parser as command arguments */
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
567
707
if(custom_argv != NULL){
568
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
569
if (ret == ARGP_ERR_UNKNOWN){
570
fprintf(stderr, "Unknown error while parsing arguments\n");
571
exitstatus = EXIT_FAILURE;
708
ret = argp_parse(&argp, custom_argc, custom_argv,
709
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
710
NULL, NULL);
711
switch(ret){
712
case 0:
713
break;
714
case ENOMEM:
715
default:
716
errno = ret;
717
error(0, errno, "argp_parse");
718
exitstatus = EX_OSERR;
719
goto fallback;
720
case EINVAL:
721
exitstatus = EX_CONFIG;
572
722
goto fallback;
573
723
}
574
724
}
575
725
726
/* Parse actual command line arguments, to let them override the
727
config file */
728
ret = argp_parse(&argp, argc, argv,
729
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
730
NULL, NULL);
731
switch(ret){
732
case 0:
733
break;
734
case ENOMEM:
735
default:
736
errno = ret;
737
error(0, errno, "argp_parse");
738
exitstatus = EX_OSERR;
739
goto fallback;
740
case EINVAL:
741
exitstatus = EX_USAGE;
742
goto fallback;
743
}
744
576
745
if(debug){
577
746
for(plugin *p = plugin_list; p != NULL; p=p->next){
578
747
fprintf(stderr, "Plugin: %s has %d arguments\n",
580
749
for(char **a = p->argv; *a != NULL; a++){
581
750
fprintf(stderr, "\tArg: %s\n", *a);
582
751
}
583
fprintf(stderr, "...and %u environment variables\n", p->envc);
752
fprintf(stderr, "...and %d environment variables\n", p->envc);
584
753
for(char **a = p->environ; *a != NULL; a++){
585
754
fprintf(stderr, "\t%s\n", *a);
586
755
}
587
756
}
588
757
}
589
590
/* Strip permissions down to nobody */
758
759
if(getuid() == 0){
760
/* Work around Debian bug #633582:
761
<http://bugs.debian.org/633582> */
762
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
763
if(plugindir_fd == -1){
764
error(0, errno, "open");
765
} else {
766
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
767
if(ret == -1){
768
error(0, errno, "fstat");
769
} else {
770
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
771
ret = fchown(plugindir_fd, uid, gid);
772
if(ret == -1){
773
error(0, errno, "fchown");
774
}
775
}
776
}
777
TEMP_FAILURE_RETRY(close(plugindir_fd));
778
}
779
}
780
781
/* Lower permissions */
782
ret = setgid(gid);
783
if(ret == -1){
784
error(0, errno, "setgid");
785
}
591
786
ret = setuid(uid);
592
if (ret == -1){
593
perror("setuid");
594
}
595
setgid(gid);
596
if (ret == -1){
597
perror("setgid");
598
}
599
600
if (plugindir == NULL){
601
dir = opendir(PDIR);
602
} else {
603
dir = opendir(plugindir);
604
}
605
606
if(dir == NULL){
607
perror("Could not open plugin dir");
608
exitstatus = EXIT_FAILURE;
609
goto fallback;
610
}
611
612
/* Set the FD_CLOEXEC flag on the directory, if possible */
787
if(ret == -1){
788
error(0, errno, "setuid");
789
}
790
791
/* Open plugin directory with close_on_exec flag */
613
792
{
614
int dir_fd = dirfd(dir);
615
if(dir_fd >= 0){
616
ret = set_cloexec_flag(dir_fd);
617
if(ret < 0){
618
perror("set_cloexec_flag");
619
exitstatus = EXIT_FAILURE;
620
goto fallback;
621
}
793
int dir_fd = -1;
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
} else {
803
dir_fd = open(plugindir, O_RDONLY |
804
#ifdef O_CLOEXEC
805
O_CLOEXEC
806
#else /* not O_CLOEXEC */
807
0
808
#endif /* not O_CLOEXEC */
809
);
810
}
811
if(dir_fd == -1){
812
error(0, errno, "Could not open plugin dir");
813
exitstatus = EX_UNAVAILABLE;
814
goto fallback;
815
}
816
817
#ifndef O_CLOEXEC
818
/* Set the FD_CLOEXEC flag on the directory */
819
ret = set_cloexec_flag(dir_fd);
820
if(ret < 0){
821
error(0, errno, "set_cloexec_flag");
822
TEMP_FAILURE_RETRY(close(dir_fd));
823
exitstatus = EX_OSERR;
824
goto fallback;
825
}
826
#endif /* O_CLOEXEC */
827
828
dir = fdopendir(dir_fd);
829
if(dir == NULL){
830
error(0, errno, "Could not open plugin dir");
831
TEMP_FAILURE_RETRY(close(dir_fd));
832
exitstatus = EX_OSERR;
833
goto fallback;
622
834
}
623
835
}
624
836
625
837
FD_ZERO(&rfds_all);
626
838
627
839
/* Read and execute any executable in the plugin directory*/
628
840
while(true){
629
dirst = readdir(dir);
841
do {
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
630
844
631
// All directory entries have been processed
845
/* All directory entries have been processed */
632
846
if(dirst == NULL){
633
if (errno == EBADF){
634
perror("readdir");
635
exitstatus = EXIT_FAILURE;
847
if(errno == EBADF){
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
636
850
goto fallback;
637
851
}
638
852
break;
640
854
641
855
d_name_len = strlen(dirst->d_name);
642
856
643
// Ignore dotfiles, backup files and other junk
857
/* Ignore dotfiles, backup files and other junk */
644
858
{
645
859
bool bad_name = false;
646
860
647
const char const *bad_prefixes[] = { ".", "#", NULL };
861
const char * const bad_prefixes[] = { ".", "#", NULL };
648
862
649
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
650
864
".dpkg-old",
865
".dpkg-bak",
651
866
".dpkg-divert", NULL };
652
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
867
#ifdef __GNUC__
868
#pragma GCC diagnostic push
869
#pragma GCC diagnostic ignored "-Wcast-qual"
870
#endif
871
for(const char **pre = (const char **)bad_prefixes;
872
*pre != NULL; pre++){
873
#ifdef __GNUC__
874
#pragma GCC diagnostic pop
875
#endif
653
876
size_t pre_len = strlen(*pre);
654
877
if((d_name_len >= pre_len)
655
878
and strncmp((dirst->d_name), *pre, pre_len) == 0){
664
887
if(bad_name){
665
888
continue;
666
889
}
667
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
890
#ifdef __GNUC__
891
#pragma GCC diagnostic push
892
#pragma GCC diagnostic ignored "-Wcast-qual"
893
#endif
894
for(const char **suf = (const char **)bad_suffixes;
895
*suf != NULL; suf++){
896
#ifdef __GNUC__
897
#pragma GCC diagnostic pop
898
#endif
668
899
size_t suf_len = strlen(*suf);
669
900
if((d_name_len >= suf_len)
670
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
671
902
== 0)){
672
903
if(debug){
673
904
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
682
913
continue;
683
914
}
684
915
}
685
916
686
917
char *filename;
687
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
918
if(plugindir == NULL){
919
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
920
dirst->d_name));
921
} else {
922
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
923
plugindir,
924
dirst->d_name));
925
}
688
926
if(ret < 0){
689
perror("asprintf");
927
error(0, errno, "asprintf");
690
928
continue;
691
929
}
692
930
693
ret = stat(filename, &st);
694
if (ret == -1){
695
perror("stat");
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
932
if(ret == -1){
933
error(0, errno, "stat");
696
934
free(filename);
697
935
continue;
698
936
}
699
937
700
938
/* Ignore non-executable files */
701
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
939
if(not S_ISREG(st.st_mode)
940
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
702
941
if(debug){
703
942
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
704
943
" with bad type or mode\n", filename);
709
948
710
949
plugin *p = getplugin(dirst->d_name);
711
950
if(p == NULL){
712
perror("getplugin");
951
error(0, errno, "getplugin");
713
952
free(filename);
714
953
continue;
715
954
}
727
966
if(g != NULL){
728
967
for(char **a = g->argv + 1; *a != NULL; a++){
729
968
if(not add_argument(p, *a)){
730
perror("add_argument");
969
error(0, errno, "add_argument");
731
970
}
732
971
}
733
972
/* Add global environment variables */
734
973
for(char **e = g->environ; *e != NULL; e++){
735
if(not add_environment(p, *e)){
736
perror("add_environment");
974
if(not add_environment(p, *e, false)){
975
error(0, errno, "add_environment");
737
976
}
738
977
}
739
978
}
743
982
process, too. */
744
983
if(p->environ[0] != NULL){
745
984
for(char **e = environ; *e != NULL; e++){
746
char *copy = strdup(*e);
747
if(copy == NULL){
748
perror("strdup");
749
continue;
750
}
751
if(not add_environment(p, copy)){
752
perror("add_environment");
985
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
753
987
}
754
988
}
755
989
}
756
990
757
991
int pipefd[2];
758
ret = pipe(pipefd);
759
if (ret == -1){
760
perror("pipe");
761
exitstatus = EXIT_FAILURE;
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
if(ret == -1){
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
762
996
goto fallback;
763
997
}
764
998
/* Ask OS to automatic close the pipe on exec */
765
999
ret = set_cloexec_flag(pipefd[0]);
766
1000
if(ret < 0){
767
perror("set_cloexec_flag");
768
exitstatus = EXIT_FAILURE;
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
769
1003
goto fallback;
770
1004
}
771
1005
ret = set_cloexec_flag(pipefd[1]);
772
1006
if(ret < 0){
773
perror("set_cloexec_flag");
774
exitstatus = EXIT_FAILURE;
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
775
1009
goto fallback;
776
1010
}
777
1011
/* Block SIGCHLD until process is safely in process list */
778
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1012
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1013
&sigchld_action.sa_mask,
1014
NULL));
779
1015
if(ret < 0){
780
perror("sigprocmask");
781
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
782
1018
goto fallback;
783
1019
}
784
// Starting a new process to be watched
785
pid_t pid = fork();
1020
/* Starting a new process to be watched */
1021
pid_t pid;
1022
do {
1023
pid = fork();
1024
} while(pid == -1 and errno == EINTR);
786
1025
if(pid == -1){
787
perror("fork");
788
exitstatus = EXIT_FAILURE;
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
789
1028
goto fallback;
790
1029
}
791
1030
if(pid == 0){
792
1031
/* this is the child process */
793
1032
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
794
1033
if(ret < 0){
795
perror("sigaction");
796
_exit(EXIT_FAILURE);
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
797
1036
}
798
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
799
1038
if(ret < 0){
800
perror("sigprocmask");
801
_exit(EXIT_FAILURE);
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
802
1041
}
803
1042
804
1043
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
805
1044
if(ret == -1){
806
perror("dup2");
807
_exit(EXIT_FAILURE);
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
808
1047
}
809
1048
810
1049
if(dirfd(dir) < 0){
814
1053
}
815
1054
if(p->environ[0] == NULL){
816
1055
if(execv(filename, p->argv) < 0){
817
perror("execv");
818
_exit(EXIT_FAILURE);
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
819
1058
}
820
1059
} else {
821
1060
if(execve(filename, p->argv, p->environ) < 0){
822
perror("execve");
823
_exit(EXIT_FAILURE);
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
824
1063
}
825
1064
}
826
1065
/* no return */
827
1066
}
828
1067
/* Parent process */
829
close(pipefd[1]); /* Close unused write end of pipe */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1069
pipe */
830
1070
free(filename);
831
1071
plugin *new_plugin = getplugin(dirst->d_name);
832
if (new_plugin == NULL){
833
perror("getplugin");
834
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1072
if(new_plugin == NULL){
1073
error(0, errno, "getplugin");
1074
ret = (int)(TEMP_FAILURE_RETRY
1075
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1076
NULL)));
835
1077
if(ret < 0){
836
perror("sigprocmask");
1078
error(0, errno, "sigprocmask");
837
1079
}
838
exitstatus = EXIT_FAILURE;
1080
exitstatus = EX_OSERR;
839
1081
goto fallback;
840
1082
}
841
1083
844
1086
845
1087
/* Unblock SIGCHLD so signal handler can be run if this process
846
1088
has already completed */
847
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
1091
NULL));
848
1092
if(ret < 0){
849
perror("sigprocmask");
850
exitstatus = EXIT_FAILURE;
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
851
1095
goto fallback;
852
1096
}
853
1097
854
FD_SET(new_plugin->fd, &rfds_all);
1098
#if defined (__GNUC__) and defined (__GLIBC__)
1099
#if not __GLIBC_PREREQ(2, 16)
1100
#pragma GCC diagnostic push
1101
#pragma GCC diagnostic ignored "-Wsign-conversion"
1102
#endif
1103
#endif
1104
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion in GNU libc
1106
before 2.16 */
1107
#if defined (__GNUC__) and defined (__GLIBC__)
1108
#if not __GLIBC_PREREQ(2, 16)
1109
#pragma GCC diagnostic pop
1110
#endif
1111
#endif
855
1112
856
if (maxfd < new_plugin->fd){
1113
if(maxfd < new_plugin->fd){
857
1114
maxfd = new_plugin->fd;
858
1115
}
859
860
1116
}
861
1117
862
closedir(dir);
1118
TEMP_FAILURE_RETRY(closedir(dir));
863
1119
dir = NULL;
864
1120
free_plugin(getplugin(NULL));
1121
865
1122
for(plugin *p = plugin_list; p != NULL; p = p->next){
866
1123
if(p->pid != 0){
867
1124
break;
872
1129
free_plugin_list();
873
1130
}
874
1131
}
875
1132
876
1133
/* Main loop while running plugins exist */
877
1134
while(plugin_list){
878
1135
fd_set rfds = rfds_all;
879
1136
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
880
if (select_ret == -1){
881
perror("select");
882
exitstatus = EXIT_FAILURE;
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
883
1140
goto fallback;
884
1141
}
885
1142
/* OK, now either a process completed, or something can be read
886
1143
from one of them */
887
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1144
for(plugin *proc = plugin_list; proc != NULL;){
888
1145
/* Is this process completely done? */
889
if(proc->eof and proc->completed){
1146
if(proc->completed and proc->eof){
890
1147
/* Only accept the plugin output if it exited cleanly */
891
1148
if(not WIFEXITED(proc->status)
892
1149
or WEXITSTATUS(proc->status) != 0){
893
1150
/* Bad exit by plugin */
894
1151
895
1152
if(debug){
896
1153
if(WIFEXITED(proc->status)){
897
fprintf(stderr, "Plugin %u exited with status %d\n",
898
(unsigned int) (proc->pid),
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
899
1157
WEXITSTATUS(proc->status));
900
} else if(WIFSIGNALED(proc->status)) {
901
fprintf(stderr, "Plugin %u killed by signal %d\n",
902
(unsigned int) (proc->pid),
903
WTERMSIG(proc->status));
1158
} else if(WIFSIGNALED(proc->status)){
1159
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1160
" signal %d: %s\n", proc->name,
1161
(intmax_t) (proc->pid),
1162
WTERMSIG(proc->status),
1163
strsignal(WTERMSIG(proc->status)));
904
1164
} else if(WCOREDUMP(proc->status)){
905
fprintf(stderr, "Plugin %d dumped core\n",
906
(unsigned int) (proc->pid));
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
907
1167
}
908
1168
}
909
1169
910
1170
/* Remove the plugin */
911
FD_CLR(proc->fd, &rfds_all);
912
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic push
1174
#pragma GCC diagnostic ignored "-Wsign-conversion"
1175
#endif
1176
#endif
1177
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1178
-Wconversion in GNU libc
1179
before 2.16 */
1180
#if defined (__GNUC__) and defined (__GLIBC__)
1181
#if not __GLIBC_PREREQ(2, 16)
1182
#pragma GCC diagnostic pop
1183
#endif
1184
#endif
1185
913
1186
/* Block signal while modifying process_list */
914
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1188
(SIG_BLOCK,
1189
&sigchld_action.sa_mask,
1190
NULL));
915
1191
if(ret < 0){
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
918
1194
goto fallback;
919
1195
}
1196
1197
plugin *next_plugin = proc->next;
920
1198
free_plugin(proc);
1199
proc = next_plugin;
1200
921
1201
/* We are done modifying process list, so unblock signal */
922
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
923
NULL);
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
924
1205
if(ret < 0){
925
perror("sigprocmask");
926
exitstatus = EXIT_FAILURE;
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
927
1208
goto fallback;
928
1209
}
929
1210
930
1211
if(plugin_list == NULL){
931
1212
break;
932
1213
}
1214
933
1215
continue;
934
1216
}
935
1217
936
1218
/* This process exited nicely, so print its buffer */
937
1219
938
1220
bool bret = print_out_password(proc->buffer,
939
1221
proc->buffer_length);
940
1222
if(not bret){
941
perror("print_out_password");
942
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
943
1225
}
944
1226
goto fallback;
945
1227
}
946
1228
947
1229
/* This process has not completed. Does it have any output? */
948
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1230
#if defined (__GNUC__) and defined (__GLIBC__)
1231
#if not __GLIBC_PREREQ(2, 16)
1232
#pragma GCC diagnostic push
1233
#pragma GCC diagnostic ignored "-Wsign-conversion"
1234
#endif
1235
#endif
1236
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1237
warning from
1238
-Wconversion
1239
in GNU libc
1240
before
1241
2.16 */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic pop
1245
#endif
1246
#endif
949
1247
/* This process had nothing to say at this time */
1248
proc = proc->next;
950
1249
continue;
951
1250
}
952
1251
/* Before reading, make the process' data buffer large enough */
953
1252
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
954
proc->buffer = realloc(proc->buffer, proc->buffer_size
955
+ (size_t) BUFFER_SIZE);
956
if (proc->buffer == NULL){
957
perror("malloc");
958
exitstatus = EXIT_FAILURE;
1253
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1254
+ (size_t) BUFFER_SIZE);
1255
if(new_buffer == NULL){
1256
error(0, errno, "malloc");
1257
exitstatus = EX_OSERR;
959
1258
goto fallback;
960
1259
}
1260
proc->buffer = new_buffer;
961
1261
proc->buffer_size += BUFFER_SIZE;
962
1262
}
963
1263
/* Read from the process */
964
ret = read(proc->fd, proc->buffer + proc->buffer_length,
965
BUFFER_SIZE);
966
if(ret < 0){
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1265
proc->buffer
1266
+ proc->buffer_length,
1267
BUFFER_SIZE));
1268
if(sret < 0){
967
1269
/* Read error from this process; ignore the error */
1270
proc = proc->next;
968
1271
continue;
969
1272
}
970
if(ret == 0){
1273
if(sret == 0){
971
1274
/* got EOF */
972
1275
proc->eof = true;
973
1276
} else {
974
proc->buffer_length += (size_t) ret;
1277
proc->buffer_length += (size_t) sret;
975
1278
}
976
1279
}
977
1280
}
978
979
1281
1282
980
1283
fallback:
981
1284
982
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
983
1287
/* Fallback if all plugins failed, none are found or an error
984
1288
occured */
985
1289
bool bret;
986
1290
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
987
1291
char *passwordbuffer = getpass("Password: ");
988
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1292
size_t len = strlen(passwordbuffer);
1293
/* Strip trailing newline */
1294
if(len > 0 and passwordbuffer[len-1] == '\n'){
1295
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1296
len--;
1297
}
1298
bret = print_out_password(passwordbuffer, len);
989
1299
if(not bret){
990
perror("print_out_password");
991
exitstatus = EXIT_FAILURE;
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
992
1302
}
993
1303
}
994
1304
995
1305
/* Restore old signal handler */
996
1306
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
997
1307
if(ret == -1){
998
perror("sigaction");
999
exitstatus = EXIT_FAILURE;
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
1000
1310
}
1001
1311
1002
1312
if(custom_argv != NULL){
1003
1313
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1004
1314
free(*arg);
1010
1320
closedir(dir);
1011
1321
}
1012
1322
1013
/* Free the process list and kill the processes */
1323
/* Kill the processes */
1014
1324
for(plugin *p = plugin_list; p != NULL; p = p->next){
1015
1325
if(p->pid != 0){
1016
1326
close(p->fd);
1017
1327
ret = kill(p->pid, SIGTERM);
1018
1328
if(ret == -1 and errno != ESRCH){
1019
1329
/* Set-uid proccesses might not get closed */
1020
perror("kill");
1330
error(0, errno, "kill");
1021
1331
}
1022
1332
}
1023
1333
}
1024
1334
1025
1335
/* Wait for any remaining child processes to terminate */
1026
do{
1336
do {
1027
1337
ret = wait(NULL);
1028
1338
} while(ret >= 0);
1029
1339
if(errno != ECHILD){
1030
perror("wait");
1340
error(0, errno, "wait");
1031
1341
}
1032
1342
1033
1343
free_plugin_list();
1034
1344
1035
1345
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0