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- Committer: Teddy Hogeborn
- Date: 2014-03-23 19:55:18 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 311.
- Revision ID: teddy@recompile.se-20140323195518-amvoytwi12iheypo
Make mandos-client prefer /run/tmp over /tmp.
* plugins.d/mandos-client.c (init_gpgme): Add more const.
(main): Make "tempdir" a pointer to the temporary directory, if one
has been created, or NULL. This also eliminates the need
for the "tempdir_created" variable.
* plugins.d/mandos-client.c (init_gpgme): Add more const.
(main): Make "tempdir" a pointer to the temporary directory, if one
has been created, or NULL. This also eliminates the need
for the "tempdir_created" variable.
- 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 */
108
__attribute__((warn_unused_result))
101
109
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))){
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))){
106
114
return p;
107
115
}
108
116
}
109
117
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
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){
112
123
return NULL;
113
124
}
114
125
char *copy_name = NULL;
115
126
if(name != NULL){
116
copy_name = strdup(name);
127
do {
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
117
130
if(copy_name == NULL){
131
int e = errno;
132
free(new_plugin);
133
errno = e;
118
134
return NULL;
119
135
}
120
136
}
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){
137
138
*new_plugin = (plugin){ .name = copy_name,
139
.argc = 1,
140
.disabled = false,
141
.next = plugin_list };
142
143
do {
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
146
if(new_plugin->argv == NULL){
147
int e = errno;
129
148
free(copy_name);
130
149
free(new_plugin);
150
errno = e;
131
151
return NULL;
132
152
}
133
153
new_plugin->argv[0] = copy_name;
134
154
new_plugin->argv[1] = NULL;
135
136
new_plugin->environ = malloc(sizeof(char *));
155
156
do {
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
137
159
if(new_plugin->environ == NULL){
160
int e = errno;
138
161
free(copy_name);
139
162
free(new_plugin->argv);
140
163
free(new_plugin);
164
errno = e;
141
165
return NULL;
142
166
}
143
167
new_plugin->environ[0] = NULL;
144
168
145
169
/* Append the new plugin to the list */
146
170
plugin_list = new_plugin;
147
171
return new_plugin;
148
172
}
149
173
150
174
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
151
176
static bool add_to_char_array(const char *new, char ***array,
152
177
int *len){
153
178
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
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);
156
184
/* Malloc check */
157
if(*array == NULL){
185
if(new_array == NULL){
158
186
return false;
159
187
}
188
*array = new_array;
160
189
/* Make a copy of the new string */
161
char *copy = strdup(new);
190
char *copy;
191
do {
192
copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
162
194
if(copy == NULL){
163
195
return false;
164
196
}
171
203
}
172
204
173
205
/* Add to a plugin's argument vector */
206
__attribute__((nonnull(2), warn_unused_result))
174
207
static bool add_argument(plugin *p, const char *arg){
175
208
if(p == NULL){
176
209
return false;
179
212
}
180
213
181
214
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def){
215
__attribute__((nonnull(2), warn_unused_result))
216
static bool add_environment(plugin *p, const char *def, bool replace){
183
217
if(p == NULL){
184
218
return false;
185
219
}
220
/* namelen = length of name of environment variable */
221
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
225
/* It already exists */
226
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){
232
return false;
233
}
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
236
}
237
return true;
238
}
239
}
186
240
return add_to_char_array(def, &(p->environ), &(p->envc));
187
241
}
188
242
189
243
/*
190
244
* Based on the example in the GNU LibC manual chapter 13.13 "File
191
245
* Descriptor Flags".
192
* *Note File Descriptor Flags:(libc)Descriptor Flags.
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
193
247
*/
194
static int set_cloexec_flag(int fd)
195
{
196
int ret = fcntl(fd, F_GETFD, 0);
248
__attribute__((warn_unused_result))
249
static int set_cloexec_flag(int fd){
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
197
251
/* If reading the flags failed, return error indication now. */
198
252
if(ret < 0){
199
253
return ret;
200
254
}
201
255
/* Store modified flag word in the descriptor. */
202
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
257
ret | FD_CLOEXEC));
203
258
}
204
259
205
260
206
261
/* Mark processes as completed when they exit, and save their exit
207
262
status. */
208
void handle_sigchld(__attribute__((unused)) int sig){
263
static void handle_sigchld(__attribute__((unused)) int sig){
264
int old_errno = errno;
209
265
while(true){
210
266
plugin *proc = plugin_list;
211
267
int status;
215
271
break;
216
272
}
217
273
if(pid == -1){
218
if (errno != ECHILD){
219
perror("waitpid");
274
if(errno == ECHILD){
275
/* No child processes */
276
break;
220
277
}
221
/* No child processes */
222
break;
278
error(0, errno, "waitpid");
223
279
}
224
280
225
281
/* A child exited, find it in process_list */
226
282
while(proc != NULL and proc->pid != pid){
227
283
proc = proc->next;
231
287
continue;
232
288
}
233
289
proc->status = status;
234
proc->completed = true;
290
proc->completed = 1;
235
291
}
292
errno = old_errno;
236
293
}
237
294
238
295
/* Prints out a password to stdout */
239
bool print_out_password(const char *buffer, size_t length){
296
__attribute__((nonnull, warn_unused_result))
297
static bool print_out_password(const char *buffer, size_t length){
240
298
ssize_t ret;
241
if(length>0 and buffer[length-1] == '\n'){
242
length--;
243
}
244
299
for(size_t written = 0; written < length; written += (size_t)ret){
245
300
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
246
301
length - written));
252
307
}
253
308
254
309
/* Removes and free a plugin from the plugin list */
310
__attribute__((nonnull))
255
311
static void free_plugin(plugin *plugin_node){
256
312
257
313
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
263
319
}
264
320
free(plugin_node->environ);
265
321
free(plugin_node->buffer);
266
322
267
323
/* Removes the plugin from the singly-linked list */
268
324
if(plugin_node == plugin_list){
269
325
/* First one - simple */
297
353
struct stat st;
298
354
fd_set rfds_all;
299
355
int ret, maxfd = 0;
356
ssize_t sret;
300
357
uid_t uid = 65534;
301
358
gid_t gid = 65534;
302
359
bool debug = false;
311
368
sigemptyset(&sigchld_action.sa_mask);
312
369
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
313
370
if(ret == -1){
314
perror("sigaddset");
315
exitstatus = EXIT_FAILURE;
371
error(0, errno, "sigaddset");
372
exitstatus = EX_OSERR;
316
373
goto fallback;
317
374
}
318
375
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
319
376
if(ret == -1){
320
perror("sigaction");
321
exitstatus = EXIT_FAILURE;
377
error(0, errno, "sigaction");
378
exitstatus = EX_OSERR;
322
379
goto fallback;
323
380
}
324
381
327
384
{ .name = "global-options", .key = 'g',
328
385
.arg = "OPTION[,OPTION[,...]]",
329
386
.doc = "Options passed to all plugins" },
330
{ .name = "global-envs", .key = 'e',
387
{ .name = "global-env", .key = 'G',
331
388
.arg = "VAR=value",
332
389
.doc = "Environment variable passed to all plugins" },
333
390
{ .name = "options-for", .key = 'o',
334
391
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
335
392
.doc = "Options passed only to specified plugin" },
336
{ .name = "envs-for", .key = 'f',
393
{ .name = "env-for", .key = 'E',
337
394
.arg = "PLUGIN:ENV=value",
338
395
.doc = "Environment variable passed to specified plugin" },
339
396
{ .name = "disable", .key = 'd',
340
397
.arg = "PLUGIN",
341
398
.doc = "Disable a specific plugin", .group = 1 },
399
{ .name = "enable", .key = 'e',
400
.arg = "PLUGIN",
401
.doc = "Enable a specific plugin", .group = 1 },
342
402
{ .name = "plugin-dir", .key = 128,
343
403
.arg = "DIRECTORY",
344
404
.doc = "Specify a different plugin directory", .group = 2 },
353
413
.doc = "Group ID the plugins will run as", .group = 3 },
354
414
{ .name = "debug", .key = 132,
355
415
.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 },
356
425
{ .name = NULL }
357
426
};
358
427
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) {
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;
364
434
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
}
382
435
{
383
char *envdef = strdup(arg);
384
if(envdef == NULL){
385
break;
386
}
387
if(not add_environment(getplugin(NULL), envdef)){
388
perror("add_environment");
389
}
436
char *plugin_option;
437
while((plugin_option = strsep(&arg, ",")) != NULL){
438
if(not add_argument(getplugin(NULL), plugin_option)){
439
break;
440
}
441
}
442
errno = 0;
443
}
444
break;
445
case 'G': /* --global-env */
446
if(add_environment(getplugin(NULL), arg, true)){
447
errno = 0;
390
448
}
391
449
break;
392
450
case 'o': /* --options-for */
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
}
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;
412
469
}
413
470
}
471
errno = 0;
414
472
}
415
473
break;
416
case 'f': /* --envs-for */
417
if(arg == NULL){
418
break;
419
}
474
case 'E': /* --env-for */
420
475
{
421
476
char *envdef = strchr(arg, ':');
422
477
if(envdef == NULL){
423
break;
424
}
425
char *p_name = strndup(arg, (size_t) (envdef-arg));
426
if(p_name == NULL){
427
break;
428
}
478
argp_error(state, "No colon in \"%s\"", arg);
479
errno = EINVAL;
480
break;
481
}
482
*envdef = '\0';
429
483
envdef++;
430
if(not add_environment(getplugin(p_name), envdef)){
431
perror("add_environment");
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;
432
491
}
433
492
}
434
493
break;
435
494
case 'd': /* --disable */
436
if (arg != NULL){
437
plugin *p = getplugin(arg);
438
if(p == NULL){
439
return ARGP_ERR_UNKNOWN;
440
}
441
p->disabled = true;
495
{
496
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = true;
499
errno = 0;
500
}
501
}
502
break;
503
case 'e': /* --enable */
504
{
505
plugin *p = getplugin(arg);
506
if(p != NULL){
507
p->disabled = false;
508
errno = 0;
509
}
442
510
}
443
511
break;
444
512
case 128: /* --plugin-dir */
513
free(plugindir);
445
514
plugindir = strdup(arg);
446
if(plugindir == NULL){
447
perror("strdup");
448
}
449
break;
450
case 129: /* --config-file */
515
if(plugindir != NULL){
516
errno = 0;
517
}
518
break;
519
case 129: /* --config-file */
520
/* This is already done by parse_opt_config_file() */
521
break;
522
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;
532
break;
533
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;
543
break;
544
case 132: /* --debug */
545
debug = true;
546
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
case ARGP_KEY_ARG:
566
/* Cryptsetup always passes an argument, which is an empty
567
string if "none" was specified in /etc/crypttab. So if
568
argument was empty, we ignore it silently. */
569
if(arg[0] == '\0'){
570
break;
571
}
572
default:
573
return ARGP_ERR_UNKNOWN;
574
}
575
return errno; /* Set to 0 at start */
576
}
577
578
/* This option parser is the same as parse_opt() above, except it
579
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){
585
case 'g': /* --global-options */
586
case 'G': /* --global-env */
587
case 'o': /* --options-for */
588
case 'E': /* --env-for */
589
case 'd': /* --disable */
590
case 'e': /* --enable */
591
case 128: /* --plugin-dir */
592
break;
593
case 129: /* --config-file */
594
free(argfile);
451
595
argfile = strdup(arg);
452
if(argfile == NULL){
453
perror("strdup");
596
if(argfile != NULL){
597
errno = 0;
454
598
}
455
break;
599
break;
456
600
case 130: /* --userid */
457
uid = (uid_t)strtol(arg, NULL, 10);
458
break;
459
601
case 131: /* --groupid */
460
gid = (gid_t)strtol(arg, NULL, 10);
461
break;
462
602
case 132: /* --debug */
463
debug = true;
464
break;
603
case '?': /* --help */
604
case -3: /* --usage */
605
case 'V': /* --version */
465
606
case ARGP_KEY_ARG:
466
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
467
break;
468
case ARGP_KEY_END:
469
607
break;
470
608
default:
471
609
return ARGP_ERR_UNKNOWN;
472
610
}
473
return 0;
611
return errno;
474
612
}
475
613
476
struct argp argp = { .options = options, .parser = parse_opt,
477
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
614
struct argp argp = { .options = options,
615
.parser = parse_opt_config_file,
616
.args_doc = "",
478
617
.doc = "Mandos plugin runner -- Run plugins" };
479
618
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;
619
/* Parse using parse_opt_config_file() in order to get the custom
620
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;
484
635
goto fallback;
485
636
}
486
487
/* Opens the configfile if aviable */
488
if (argfile == NULL){
637
638
/* Reset to the normal argument parser */
639
argp.parser = parse_opt;
640
641
/* Open the configfile if available */
642
if(argfile == NULL){
489
643
conffp = fopen(AFILE, "r");
490
644
} else {
491
645
conffp = fopen(argfile, "r");
492
}
646
}
493
647
if(conffp != NULL){
494
648
char *org_line = NULL;
495
649
char *p, *arg, *new_arg, *line;
496
650
size_t size = 0;
497
ssize_t sret;
498
651
const char whitespace_delims[] = " \r\t\f\v\n";
499
652
const char comment_delim[] = "#";
500
653
501
654
custom_argc = 1;
502
655
custom_argv = malloc(sizeof(char*) * 2);
503
656
if(custom_argv == NULL){
504
perror("malloc");
505
exitstatus = EXIT_FAILURE;
657
error(0, errno, "malloc");
658
exitstatus = EX_OSERR;
506
659
goto fallback;
507
660
}
508
661
custom_argv[0] = argv[0];
509
662
custom_argv[1] = NULL;
510
663
511
664
/* for each line in the config file, strip whitespace and ignore
512
665
commented text */
513
666
while(true){
515
668
if(sret == -1){
516
669
break;
517
670
}
518
671
519
672
line = org_line;
520
673
arg = strsep(&line, comment_delim);
521
674
while((p = strsep(&arg, whitespace_delims)) != NULL){
524
677
}
525
678
new_arg = strdup(p);
526
679
if(new_arg == NULL){
527
perror("strdup");
528
exitstatus = EXIT_FAILURE;
680
error(0, errno, "strdup");
681
exitstatus = EX_OSERR;
529
682
free(org_line);
530
683
goto fallback;
531
684
}
532
685
533
686
custom_argc += 1;
534
custom_argv = realloc(custom_argv, sizeof(char *)
535
* ((unsigned int) custom_argc + 1));
536
if(custom_argv == NULL){
537
perror("realloc");
538
exitstatus = EXIT_FAILURE;
539
free(org_line);
540
goto fallback;
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
}
541
700
}
542
701
custom_argv[custom_argc-1] = new_arg;
543
custom_argv[custom_argc] = NULL;
702
custom_argv[custom_argc] = NULL;
544
703
}
545
704
}
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
}
546
713
free(org_line);
547
} else{
714
} else {
548
715
/* Check for harmful errors and go to fallback. Other errors might
549
716
not affect opening plugins */
550
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
551
perror("fopen");
552
exitstatus = EXIT_FAILURE;
717
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
553
720
goto fallback;
554
721
}
555
722
}
556
/* If there was any arguments from configuration file,
557
pass them to parser as command arguments */
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
558
725
if(custom_argv != NULL){
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;
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;
563
740
goto fallback;
564
741
}
565
742
}
566
743
744
/* Parse actual command line arguments, to let them override the
745
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;
760
goto fallback;
761
}
762
567
763
if(debug){
568
764
for(plugin *p = plugin_list; p != NULL; p=p->next){
569
765
fprintf(stderr, "Plugin: %s has %d arguments\n",
571
767
for(char **a = p->argv; *a != NULL; a++){
572
768
fprintf(stderr, "\tArg: %s\n", *a);
573
769
}
574
fprintf(stderr, "...and %u environment variables\n", p->envc);
770
fprintf(stderr, "...and %d environment variables\n", p->envc);
575
771
for(char **a = p->environ; *a != NULL; a++){
576
772
fprintf(stderr, "\t%s\n", *a);
577
773
}
578
774
}
579
775
}
580
581
/* Strip permissions down to nobody */
776
777
if(getuid() == 0){
778
/* Work around Debian bug #633582:
779
<http://bugs.debian.org/633582> */
780
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
781
if(plugindir_fd == -1){
782
error(0, errno, "open");
783
} else {
784
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
785
if(ret == -1){
786
error(0, errno, "fstat");
787
} else {
788
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
789
ret = fchown(plugindir_fd, uid, gid);
790
if(ret == -1){
791
error(0, errno, "fchown");
792
}
793
}
794
}
795
TEMP_FAILURE_RETRY(close(plugindir_fd));
796
}
797
}
798
799
/* Lower permissions */
800
ret = setgid(gid);
801
if(ret == -1){
802
error(0, errno, "setgid");
803
}
582
804
ret = setuid(uid);
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 */
805
if(ret == -1){
806
error(0, errno, "setuid");
807
}
808
809
/* Open plugin directory with close_on_exec flag */
604
810
{
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
}
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;
613
852
}
614
853
}
615
854
616
855
FD_ZERO(&rfds_all);
617
856
618
857
/* Read and execute any executable in the plugin directory*/
619
858
while(true){
620
dirst = readdir(dir);
859
do {
860
dirst = readdir(dir);
861
} while(dirst == NULL and errno == EINTR);
621
862
622
// All directory entries have been processed
863
/* All directory entries have been processed */
623
864
if(dirst == NULL){
624
if (errno == EBADF){
625
perror("readdir");
626
exitstatus = EXIT_FAILURE;
865
if(errno == EBADF){
866
error(0, errno, "readdir");
867
exitstatus = EX_IOERR;
627
868
goto fallback;
628
869
}
629
870
break;
631
872
632
873
d_name_len = strlen(dirst->d_name);
633
874
634
// Ignore dotfiles, backup files and other junk
875
/* Ignore dotfiles, backup files and other junk */
635
876
{
636
877
bool bad_name = false;
637
878
638
const char const *bad_prefixes[] = { ".", "#", NULL };
879
const char * const bad_prefixes[] = { ".", "#", NULL };
639
880
640
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
881
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
641
882
".dpkg-old",
883
".dpkg-bak",
642
884
".dpkg-divert", NULL };
643
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
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
644
894
size_t pre_len = strlen(*pre);
645
895
if((d_name_len >= pre_len)
646
896
and strncmp((dirst->d_name), *pre, pre_len) == 0){
655
905
if(bad_name){
656
906
continue;
657
907
}
658
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
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
659
917
size_t suf_len = strlen(*suf);
660
918
if((d_name_len >= suf_len)
661
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
919
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
662
920
== 0)){
663
921
if(debug){
664
922
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
673
931
continue;
674
932
}
675
933
}
676
934
677
935
char *filename;
678
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
936
if(plugindir == NULL){
937
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
938
dirst->d_name));
939
} else {
940
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
941
plugindir,
942
dirst->d_name));
943
}
679
944
if(ret < 0){
680
perror("asprintf");
945
error(0, errno, "asprintf");
681
946
continue;
682
947
}
683
948
684
ret = stat(filename, &st);
685
if (ret == -1){
686
perror("stat");
949
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
950
if(ret == -1){
951
error(0, errno, "stat");
687
952
free(filename);
688
953
continue;
689
954
}
690
955
691
956
/* Ignore non-executable files */
692
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
957
if(not S_ISREG(st.st_mode)
958
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
693
959
if(debug){
694
960
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
695
961
" with bad type or mode\n", filename);
700
966
701
967
plugin *p = getplugin(dirst->d_name);
702
968
if(p == NULL){
703
perror("getplugin");
969
error(0, errno, "getplugin");
704
970
free(filename);
705
971
continue;
706
972
}
718
984
if(g != NULL){
719
985
for(char **a = g->argv + 1; *a != NULL; a++){
720
986
if(not add_argument(p, *a)){
721
perror("add_argument");
987
error(0, errno, "add_argument");
722
988
}
723
989
}
724
990
/* Add global environment variables */
725
991
for(char **e = g->environ; *e != NULL; e++){
726
if(not add_environment(p, *e)){
727
perror("add_environment");
992
if(not add_environment(p, *e, false)){
993
error(0, errno, "add_environment");
728
994
}
729
995
}
730
996
}
734
1000
process, too. */
735
1001
if(p->environ[0] != NULL){
736
1002
for(char **e = environ; *e != NULL; e++){
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");
1003
if(not add_environment(p, *e, false)){
1004
error(0, errno, "add_environment");
744
1005
}
745
1006
}
746
1007
}
747
1008
748
1009
int pipefd[2];
749
ret = pipe(pipefd);
750
if (ret == -1){
751
perror("pipe");
752
exitstatus = EXIT_FAILURE;
1010
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1011
if(ret == -1){
1012
error(0, errno, "pipe");
1013
exitstatus = EX_OSERR;
753
1014
goto fallback;
754
1015
}
755
1016
/* Ask OS to automatic close the pipe on exec */
756
1017
ret = set_cloexec_flag(pipefd[0]);
757
1018
if(ret < 0){
758
perror("set_cloexec_flag");
759
exitstatus = EXIT_FAILURE;
1019
error(0, errno, "set_cloexec_flag");
1020
exitstatus = EX_OSERR;
760
1021
goto fallback;
761
1022
}
762
1023
ret = set_cloexec_flag(pipefd[1]);
763
1024
if(ret < 0){
764
perror("set_cloexec_flag");
765
exitstatus = EXIT_FAILURE;
1025
error(0, errno, "set_cloexec_flag");
1026
exitstatus = EX_OSERR;
766
1027
goto fallback;
767
1028
}
768
1029
/* Block SIGCHLD until process is safely in process list */
769
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1030
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1031
&sigchld_action.sa_mask,
1032
NULL));
770
1033
if(ret < 0){
771
perror("sigprocmask");
772
exitstatus = EXIT_FAILURE;
1034
error(0, errno, "sigprocmask");
1035
exitstatus = EX_OSERR;
773
1036
goto fallback;
774
1037
}
775
// Starting a new process to be watched
776
pid_t pid = fork();
1038
/* Starting a new process to be watched */
1039
pid_t pid;
1040
do {
1041
pid = fork();
1042
} while(pid == -1 and errno == EINTR);
777
1043
if(pid == -1){
778
perror("fork");
779
exitstatus = EXIT_FAILURE;
1044
error(0, errno, "fork");
1045
exitstatus = EX_OSERR;
780
1046
goto fallback;
781
1047
}
782
1048
if(pid == 0){
783
1049
/* this is the child process */
784
1050
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
785
1051
if(ret < 0){
786
perror("sigaction");
787
_exit(EXIT_FAILURE);
1052
error(0, errno, "sigaction");
1053
_exit(EX_OSERR);
788
1054
}
789
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
790
1056
if(ret < 0){
791
perror("sigprocmask");
792
_exit(EXIT_FAILURE);
1057
error(0, errno, "sigprocmask");
1058
_exit(EX_OSERR);
793
1059
}
794
1060
795
1061
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
796
1062
if(ret == -1){
797
perror("dup2");
798
_exit(EXIT_FAILURE);
1063
error(0, errno, "dup2");
1064
_exit(EX_OSERR);
799
1065
}
800
1066
801
1067
if(dirfd(dir) < 0){
805
1071
}
806
1072
if(p->environ[0] == NULL){
807
1073
if(execv(filename, p->argv) < 0){
808
perror("execv");
809
_exit(EXIT_FAILURE);
1074
error(0, errno, "execv for %s", filename);
1075
_exit(EX_OSERR);
810
1076
}
811
1077
} else {
812
1078
if(execve(filename, p->argv, p->environ) < 0){
813
perror("execve");
814
_exit(EXIT_FAILURE);
1079
error(0, errno, "execve for %s", filename);
1080
_exit(EX_OSERR);
815
1081
}
816
1082
}
817
1083
/* no return */
818
1084
}
819
1085
/* Parent process */
820
close(pipefd[1]); /* Close unused write end of pipe */
1086
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1087
pipe */
821
1088
free(filename);
822
1089
plugin *new_plugin = getplugin(dirst->d_name);
823
if (new_plugin == NULL){
824
perror("getplugin");
825
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1090
if(new_plugin == NULL){
1091
error(0, errno, "getplugin");
1092
ret = (int)(TEMP_FAILURE_RETRY
1093
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1094
NULL)));
826
1095
if(ret < 0){
827
perror("sigprocmask");
1096
error(0, errno, "sigprocmask");
828
1097
}
829
exitstatus = EXIT_FAILURE;
1098
exitstatus = EX_OSERR;
830
1099
goto fallback;
831
1100
}
832
1101
835
1104
836
1105
/* Unblock SIGCHLD so signal handler can be run if this process
837
1106
has already completed */
838
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1107
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1108
&sigchld_action.sa_mask,
1109
NULL));
839
1110
if(ret < 0){
840
perror("sigprocmask");
841
exitstatus = EXIT_FAILURE;
1111
error(0, errno, "sigprocmask");
1112
exitstatus = EX_OSERR;
842
1113
goto fallback;
843
1114
}
844
1115
845
FD_SET(new_plugin->fd, &rfds_all);
1116
#if defined (__GNUC__) and defined (__GLIBC__)
1117
#if not __GLIBC_PREREQ(2, 16)
1118
#pragma GCC diagnostic push
1119
#pragma GCC diagnostic ignored "-Wsign-conversion"
1120
#endif
1121
#endif
1122
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1123
-Wconversion in GNU libc
1124
before 2.16 */
1125
#if defined (__GNUC__) and defined (__GLIBC__)
1126
#if not __GLIBC_PREREQ(2, 16)
1127
#pragma GCC diagnostic pop
1128
#endif
1129
#endif
846
1130
847
if (maxfd < new_plugin->fd){
1131
if(maxfd < new_plugin->fd){
848
1132
maxfd = new_plugin->fd;
849
1133
}
850
851
1134
}
852
1135
853
closedir(dir);
1136
TEMP_FAILURE_RETRY(closedir(dir));
854
1137
dir = NULL;
855
1138
free_plugin(getplugin(NULL));
1139
856
1140
for(plugin *p = plugin_list; p != NULL; p = p->next){
857
1141
if(p->pid != 0){
858
1142
break;
863
1147
free_plugin_list();
864
1148
}
865
1149
}
866
1150
867
1151
/* Main loop while running plugins exist */
868
1152
while(plugin_list){
869
1153
fd_set rfds = rfds_all;
870
1154
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
871
if (select_ret == -1){
872
perror("select");
873
exitstatus = EXIT_FAILURE;
1155
if(select_ret == -1 and errno != EINTR){
1156
error(0, errno, "select");
1157
exitstatus = EX_OSERR;
874
1158
goto fallback;
875
1159
}
876
1160
/* OK, now either a process completed, or something can be read
877
1161
from one of them */
878
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1162
for(plugin *proc = plugin_list; proc != NULL;){
879
1163
/* Is this process completely done? */
880
if(proc->eof and proc->completed){
1164
if(proc->completed and proc->eof){
881
1165
/* Only accept the plugin output if it exited cleanly */
882
1166
if(not WIFEXITED(proc->status)
883
1167
or WEXITSTATUS(proc->status) != 0){
884
1168
/* Bad exit by plugin */
885
1169
886
1170
if(debug){
887
1171
if(WIFEXITED(proc->status)){
888
fprintf(stderr, "Plugin %u exited with status %d\n",
889
(unsigned int) (proc->pid),
1172
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1173
" status %d\n", proc->name,
1174
(intmax_t) (proc->pid),
890
1175
WEXITSTATUS(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));
1176
} else if(WIFSIGNALED(proc->status)){
1177
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1178
" signal %d: %s\n", proc->name,
1179
(intmax_t) (proc->pid),
1180
WTERMSIG(proc->status),
1181
strsignal(WTERMSIG(proc->status)));
895
1182
} else if(WCOREDUMP(proc->status)){
896
fprintf(stderr, "Plugin %d dumped core\n",
897
(unsigned int) (proc->pid));
1183
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1184
" core\n", proc->name, (intmax_t) (proc->pid));
898
1185
}
899
1186
}
900
1187
901
1188
/* Remove the plugin */
902
FD_CLR(proc->fd, &rfds_all);
903
1189
#if defined (__GNUC__) and defined (__GLIBC__)
1190
#if not __GLIBC_PREREQ(2, 16)
1191
#pragma GCC diagnostic push
1192
#pragma GCC diagnostic ignored "-Wsign-conversion"
1193
#endif
1194
#endif
1195
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1196
-Wconversion in GNU libc
1197
before 2.16 */
1198
#if defined (__GNUC__) and defined (__GLIBC__)
1199
#if not __GLIBC_PREREQ(2, 16)
1200
#pragma GCC diagnostic pop
1201
#endif
1202
#endif
1203
904
1204
/* Block signal while modifying process_list */
905
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1205
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1206
(SIG_BLOCK,
1207
&sigchld_action.sa_mask,
1208
NULL));
906
1209
if(ret < 0){
907
perror("sigprocmask");
908
exitstatus = EXIT_FAILURE;
1210
error(0, errno, "sigprocmask");
1211
exitstatus = EX_OSERR;
909
1212
goto fallback;
910
1213
}
1214
1215
plugin *next_plugin = proc->next;
911
1216
free_plugin(proc);
1217
proc = next_plugin;
1218
912
1219
/* We are done modifying process list, so unblock signal */
913
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
914
NULL);
1220
ret = (int)(TEMP_FAILURE_RETRY
1221
(sigprocmask(SIG_UNBLOCK,
1222
&sigchld_action.sa_mask, NULL)));
915
1223
if(ret < 0){
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1224
error(0, errno, "sigprocmask");
1225
exitstatus = EX_OSERR;
918
1226
goto fallback;
919
1227
}
920
1228
921
1229
if(plugin_list == NULL){
922
1230
break;
923
1231
}
1232
924
1233
continue;
925
1234
}
926
1235
927
1236
/* This process exited nicely, so print its buffer */
928
1237
929
1238
bool bret = print_out_password(proc->buffer,
930
1239
proc->buffer_length);
931
1240
if(not bret){
932
perror("print_out_password");
933
exitstatus = EXIT_FAILURE;
1241
error(0, errno, "print_out_password");
1242
exitstatus = EX_IOERR;
934
1243
}
935
1244
goto fallback;
936
1245
}
937
1246
938
1247
/* This process has not completed. Does it have any output? */
939
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1248
#if defined (__GNUC__) and defined (__GLIBC__)
1249
#if not __GLIBC_PREREQ(2, 16)
1250
#pragma GCC diagnostic push
1251
#pragma GCC diagnostic ignored "-Wsign-conversion"
1252
#endif
1253
#endif
1254
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1255
warning from
1256
-Wconversion
1257
in GNU libc
1258
before
1259
2.16 */
1260
#if defined (__GNUC__) and defined (__GLIBC__)
1261
#if not __GLIBC_PREREQ(2, 16)
1262
#pragma GCC diagnostic pop
1263
#endif
1264
#endif
940
1265
/* This process had nothing to say at this time */
1266
proc = proc->next;
941
1267
continue;
942
1268
}
943
1269
/* Before reading, make the process' data buffer large enough */
944
1270
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
945
proc->buffer = realloc(proc->buffer, proc->buffer_size
946
+ (size_t) BUFFER_SIZE);
947
if (proc->buffer == NULL){
948
perror("malloc");
949
exitstatus = EXIT_FAILURE;
1271
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1272
+ (size_t) BUFFER_SIZE);
1273
if(new_buffer == NULL){
1274
error(0, errno, "malloc");
1275
exitstatus = EX_OSERR;
950
1276
goto fallback;
951
1277
}
1278
proc->buffer = new_buffer;
952
1279
proc->buffer_size += BUFFER_SIZE;
953
1280
}
954
1281
/* Read from the process */
955
ret = read(proc->fd, proc->buffer + proc->buffer_length,
956
BUFFER_SIZE);
957
if(ret < 0){
1282
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1283
proc->buffer
1284
+ proc->buffer_length,
1285
BUFFER_SIZE));
1286
if(sret < 0){
958
1287
/* Read error from this process; ignore the error */
1288
proc = proc->next;
959
1289
continue;
960
1290
}
961
if(ret == 0){
1291
if(sret == 0){
962
1292
/* got EOF */
963
1293
proc->eof = true;
964
1294
} else {
965
proc->buffer_length += (size_t) ret;
1295
proc->buffer_length += (size_t) sret;
966
1296
}
967
1297
}
968
1298
}
969
970
1299
1300
971
1301
fallback:
972
1302
973
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1303
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1304
and exitstatus != EX_OK)){
974
1305
/* Fallback if all plugins failed, none are found or an error
975
1306
occured */
976
1307
bool bret;
977
1308
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
978
1309
char *passwordbuffer = getpass("Password: ");
979
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1310
size_t len = strlen(passwordbuffer);
1311
/* Strip trailing newline */
1312
if(len > 0 and passwordbuffer[len-1] == '\n'){
1313
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1314
len--;
1315
}
1316
bret = print_out_password(passwordbuffer, len);
980
1317
if(not bret){
981
perror("print_out_password");
982
exitstatus = EXIT_FAILURE;
1318
error(0, errno, "print_out_password");
1319
exitstatus = EX_IOERR;
983
1320
}
984
1321
}
985
1322
986
1323
/* Restore old signal handler */
987
1324
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
988
1325
if(ret == -1){
989
perror("sigaction");
990
exitstatus = EXIT_FAILURE;
1326
error(0, errno, "sigaction");
1327
exitstatus = EX_OSERR;
991
1328
}
992
1329
993
1330
if(custom_argv != NULL){
994
1331
for(char **arg = custom_argv+1; *arg != NULL; arg++){
995
1332
free(*arg);
1001
1338
closedir(dir);
1002
1339
}
1003
1340
1004
/* Free the process list and kill the processes */
1341
/* Kill the processes */
1005
1342
for(plugin *p = plugin_list; p != NULL; p = p->next){
1006
1343
if(p->pid != 0){
1007
1344
close(p->fd);
1008
1345
ret = kill(p->pid, SIGTERM);
1009
1346
if(ret == -1 and errno != ESRCH){
1010
1347
/* Set-uid proccesses might not get closed */
1011
perror("kill");
1348
error(0, errno, "kill");
1012
1349
}
1013
1350
}
1014
1351
}
1015
1352
1016
1353
/* Wait for any remaining child processes to terminate */
1017
do{
1354
do {
1018
1355
ret = wait(NULL);
1019
1356
} while(ret >= 0);
1020
1357
if(errno != ECHILD){
1021
perror("wait");
1358
error(0, errno, "wait");
1022
1359
}
1023
1360
1024
1361
free_plugin_list();
1025
1362
1026
1363
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0