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- Committer: Teddy Hogeborn
- Date: 2009-09-08 04:41:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20090908044137-4cxubotvn4etoxxl
* plugins.d/mandos-client.c (main): Bug fix: Check result of setgid().
Bug fix: If taking down network
interface, do not drop privileges
completely; save them and reassert
privileges when needed.
Bug fix: If taking down network
interface, do not drop privileges
completely; save them and reassert
privileges when needed.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
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 © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 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
21
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
23
*/
23
24
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
26
27
#include <stddef.h> /* size_t, NULL */
27
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
29
EXIT_SUCCESS, realloc() */
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
32
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
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
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
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> /* strtok, strlen(), strcpy(),
55
strcat() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
56
58
#include <errno.h> /* errno */
57
59
#include <argp.h> /* struct argp_option, struct
58
60
argp_state, struct argp,
59
61
argp_parse(), ARGP_ERR_UNKNOWN,
60
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
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() */
66
71
67
72
#define BUFFER_SIZE 256
68
73
69
const char *argp_program_version = "mandos-client 1.0";
74
#define PDIR "/lib/mandos/plugins.d"
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
77
const char *argp_program_version = "plugin-runner " VERSION;
70
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
79
72
struct process;
73
74
typedef struct process{
80
typedef struct plugin{
81
char *name; /* can be NULL or any plugin name */
82
char **argv;
83
int argc;
84
char **environ;
85
int envc;
86
bool disabled;
87
88
/* Variables used for running processes*/
75
89
pid_t pid;
76
90
int fd;
77
91
char *buffer;
78
92
size_t buffer_size;
79
93
size_t buffer_length;
80
94
bool eof;
81
bool completed;
95
volatile sig_atomic_t completed;
82
96
int status;
83
struct process *next;
84
} process;
85
86
typedef struct plugin{
87
char *name; /* can be NULL or any plugin name */
88
char **argv;
89
int argc;
90
bool disabled;
91
97
struct plugin *next;
92
98
} plugin;
93
99
94
static plugin *getplugin(char *name, plugin **plugin_list){
95
for (plugin *p = *plugin_list; p != NULL; p = p->next){
96
if ((p->name == name)
97
or (p->name and name and (strcmp(p->name, name) == 0))){
100
static plugin *plugin_list = NULL;
101
102
/* Gets an existing plugin based on name,
103
or if none is found, creates a new one */
104
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
if((p->name == name)
108
or (p->name and name and (strcmp(p->name, name) == 0))){
98
109
return p;
99
110
}
100
111
}
101
112
/* Create a new plugin */
102
plugin *new_plugin = malloc(sizeof(plugin));
103
if (new_plugin == NULL){
104
perror("malloc");
105
exit(EXIT_FAILURE);
106
}
107
new_plugin->name = name;
108
new_plugin->argv = malloc(sizeof(char *) * 2);
109
if (new_plugin->argv == NULL){
110
perror("malloc");
111
exit(EXIT_FAILURE);
112
}
113
new_plugin->argv[0] = name;
113
plugin *new_plugin = NULL;
114
do {
115
new_plugin = malloc(sizeof(plugin));
116
} while(new_plugin == NULL and errno == EINTR);
117
if(new_plugin == NULL){
118
return NULL;
119
}
120
char *copy_name = NULL;
121
if(name != NULL){
122
do {
123
copy_name = strdup(name);
124
} while(copy_name == NULL and errno == EINTR);
125
if(copy_name == NULL){
126
free(new_plugin);
127
return NULL;
128
}
129
}
130
131
*new_plugin = (plugin){ .name = copy_name,
132
.argc = 1,
133
.disabled = false,
134
.next = plugin_list };
135
136
do {
137
new_plugin->argv = malloc(sizeof(char *) * 2);
138
} while(new_plugin->argv == NULL and errno == EINTR);
139
if(new_plugin->argv == NULL){
140
free(copy_name);
141
free(new_plugin);
142
return NULL;
143
}
144
new_plugin->argv[0] = copy_name;
114
145
new_plugin->argv[1] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
146
147
do {
148
new_plugin->environ = malloc(sizeof(char *));
149
} while(new_plugin->environ == NULL and errno == EINTR);
150
if(new_plugin->environ == NULL){
151
free(copy_name);
152
free(new_plugin->argv);
153
free(new_plugin);
154
return NULL;
155
}
156
new_plugin->environ[0] = NULL;
157
118
158
/* Append the new plugin to the list */
119
*plugin_list = new_plugin;
159
plugin_list = new_plugin;
120
160
return new_plugin;
121
161
}
122
162
123
static void addargument(plugin *p, char *arg){
124
p->argv[p->argc] = arg;
125
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
if (p->argv == NULL){
127
perror("malloc");
128
exit(EXIT_FAILURE);
129
}
130
p->argc++;
131
p->argv[p->argc] = NULL;
163
/* Helper function for add_argument and add_environment */
164
static bool add_to_char_array(const char *new, char ***array,
165
int *len){
166
/* Resize the pointed-to array to hold one more pointer */
167
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
171
/* Malloc check */
172
if(*array == NULL){
173
return false;
174
}
175
/* Make a copy of the new string */
176
char *copy;
177
do {
178
copy = strdup(new);
179
} while(copy == NULL and errno == EINTR);
180
if(copy == NULL){
181
return false;
182
}
183
/* Insert the copy */
184
(*array)[*len] = copy;
185
(*len)++;
186
/* Add a new terminating NULL pointer to the last element */
187
(*array)[*len] = NULL;
188
return true;
189
}
190
191
/* Add to a plugin's argument vector */
192
static bool add_argument(plugin *p, const char *arg){
193
if(p == NULL){
194
return false;
195
}
196
return add_to_char_array(arg, &(p->argv), &(p->argc));
197
}
198
199
/* Add to a plugin's environment */
200
static bool add_environment(plugin *p, const char *def, bool replace){
201
if(p == NULL){
202
return false;
203
}
204
/* namelen = length of name of environment variable */
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
209
/* It already exists */
210
if(replace){
211
char *new;
212
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
216
return false;
217
}
218
*e = new;
219
strcpy(*e, def);
220
}
221
return true;
222
}
223
}
224
return add_to_char_array(def, &(p->environ), &(p->envc));
132
225
}
133
226
134
227
/*
135
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
136
229
* Descriptor Flags".
137
* *Note File Descriptor Flags:(libc)Descriptor Flags.
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
138
231
*/
139
static int set_cloexec_flag(int fd)
140
{
141
int ret = fcntl(fd, F_GETFD, 0);
232
static int set_cloexec_flag(int fd){
233
int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
142
234
/* If reading the flags failed, return error indication now. */
143
235
if(ret < 0){
144
236
return ret;
145
237
}
146
238
/* Store modified flag word in the descriptor. */
147
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
239
return TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, ret | FD_CLOEXEC));
148
240
}
149
241
150
process *process_list = NULL;
151
242
152
/* Mark a process as completed when it exits, and save its exit
243
/* Mark processes as completed when they exit, and save their exit
153
244
status. */
154
void handle_sigchld(__attribute__((unused)) int sig){
155
process *proc = process_list;
156
int status;
157
pid_t pid = wait(&status);
158
if(pid == -1){
159
perror("wait");
160
return;
161
}
162
while(proc != NULL and proc->pid != pid){
163
proc = proc->next;
164
}
165
if(proc == NULL){
166
/* Process not found in process list */
167
return;
168
}
169
proc->status = status;
170
proc->completed = true;
245
static void handle_sigchld(__attribute__((unused)) int sig){
246
int old_errno = errno;
247
while(true){
248
plugin *proc = plugin_list;
249
int status;
250
pid_t pid = waitpid(-1, &status, WNOHANG);
251
if(pid == 0){
252
/* Only still running child processes */
253
break;
254
}
255
if(pid == -1){
256
if(errno == ECHILD){
257
/* No child processes */
258
break;
259
}
260
perror("waitpid");
261
}
262
263
/* A child exited, find it in process_list */
264
while(proc != NULL and proc->pid != pid){
265
proc = proc->next;
266
}
267
if(proc == NULL){
268
/* Process not found in process list */
269
continue;
270
}
271
proc->status = status;
272
proc->completed = 1;
273
}
274
errno = old_errno;
171
275
}
172
276
173
bool print_out_password(const char *buffer, size_t length){
277
/* Prints out a password to stdout */
278
static bool print_out_password(const char *buffer, size_t length){
174
279
ssize_t ret;
175
if(length>0 and buffer[length-1] == '\n'){
176
length--;
177
}
178
280
for(size_t written = 0; written < length; written += (size_t)ret){
179
281
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
180
282
length - written));
185
287
return true;
186
288
}
187
289
290
/* Removes and free a plugin from the plugin list */
291
static void free_plugin(plugin *plugin_node){
292
293
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
294
free(*arg);
295
}
296
free(plugin_node->argv);
297
for(char **env = plugin_node->environ; *env != NULL; env++){
298
free(*env);
299
}
300
free(plugin_node->environ);
301
free(plugin_node->buffer);
302
303
/* Removes the plugin from the singly-linked list */
304
if(plugin_node == plugin_list){
305
/* First one - simple */
306
plugin_list = plugin_list->next;
307
} else {
308
/* Second one or later */
309
for(plugin *p = plugin_list; p != NULL; p = p->next){
310
if(p->next == plugin_node){
311
p->next = plugin_node->next;
312
break;
313
}
314
}
315
}
316
317
free(plugin_node);
318
}
319
320
static void free_plugin_list(void){
321
while(plugin_list != NULL){
322
free_plugin(plugin_list);
323
}
324
}
325
188
326
int main(int argc, char *argv[]){
189
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
327
char *plugindir = NULL;
328
char *argfile = NULL;
329
FILE *conffp;
190
330
size_t d_name_len;
191
331
DIR *dir = NULL;
192
332
struct dirent *dirst;
193
333
struct stat st;
194
334
fd_set rfds_all;
195
335
int ret, maxfd = 0;
336
ssize_t sret;
196
337
uid_t uid = 65534;
197
338
gid_t gid = 65534;
198
339
bool debug = false;
200
341
struct sigaction old_sigchld_action;
201
342
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
202
343
.sa_flags = SA_NOCLDSTOP };
203
char *plus_options = NULL;
204
char **plus_argv = NULL;
205
206
errno = 0;
344
char **custom_argv = NULL;
345
int custom_argc = 0;
207
346
208
347
/* Establish a signal handler */
209
348
sigemptyset(&sigchld_action.sa_mask);
210
349
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
211
if(ret < 0){
350
if(ret == -1){
212
351
perror("sigaddset");
213
exit(EXIT_FAILURE);
352
exitstatus = EXIT_FAILURE;
353
goto fallback;
214
354
}
215
355
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
216
if(ret < 0){
356
if(ret == -1){
217
357
perror("sigaction");
218
exit(EXIT_FAILURE);
358
exitstatus = EXIT_FAILURE;
359
goto fallback;
219
360
}
220
361
221
362
/* The options we understand. */
223
364
{ .name = "global-options", .key = 'g',
224
365
.arg = "OPTION[,OPTION[,...]]",
225
366
.doc = "Options passed to all plugins" },
367
{ .name = "global-env", .key = 'G',
368
.arg = "VAR=value",
369
.doc = "Environment variable passed to all plugins" },
226
370
{ .name = "options-for", .key = 'o',
227
371
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
228
372
.doc = "Options passed only to specified plugin" },
373
{ .name = "env-for", .key = 'E',
374
.arg = "PLUGIN:ENV=value",
375
.doc = "Environment variable passed to specified plugin" },
229
376
{ .name = "disable", .key = 'd',
230
377
.arg = "PLUGIN",
231
378
.doc = "Disable a specific plugin", .group = 1 },
379
{ .name = "enable", .key = 'e',
380
.arg = "PLUGIN",
381
.doc = "Enable a specific plugin", .group = 1 },
232
382
{ .name = "plugin-dir", .key = 128,
233
383
.arg = "DIRECTORY",
234
384
.doc = "Specify a different plugin directory", .group = 2 },
235
{ .name = "userid", .key = 129,
236
.arg = "ID", .flags = 0,
237
.doc = "User ID the plugins will run as", .group = 2 },
238
{ .name = "groupid", .key = 130,
239
.arg = "ID", .flags = 0,
240
.doc = "Group ID the plugins will run as", .group = 2 },
241
{ .name = "debug", .key = 131,
242
.doc = "Debug mode", .group = 3 },
385
{ .name = "config-file", .key = 129,
386
.arg = "FILE",
387
.doc = "Specify a different configuration file", .group = 2 },
388
{ .name = "userid", .key = 130,
389
.arg = "ID", .flags = 0,
390
.doc = "User ID the plugins will run as", .group = 3 },
391
{ .name = "groupid", .key = 131,
392
.arg = "ID", .flags = 0,
393
.doc = "Group ID the plugins will run as", .group = 3 },
394
{ .name = "debug", .key = 132,
395
.doc = "Debug mode", .group = 4 },
243
396
{ .name = NULL }
244
397
};
245
398
246
error_t parse_opt (int key, char *arg, struct argp_state *state) {
247
/* Get the INPUT argument from `argp_parse', which we know is a
248
pointer to our plugin list pointer. */
249
plugin **plugins = state->input;
250
switch (key) {
251
case 'g':
252
if (arg != NULL){
253
char *p = strtok(arg, ",");
254
do{
255
addargument(getplugin(NULL, plugins), p);
256
p = strtok(NULL, ",");
257
} while (p != NULL);
258
}
259
break;
260
case 'o':
261
if (arg != NULL){
262
char *name = strtok(arg, ":");
263
char *p = strtok(NULL, ":");
264
if(p != NULL){
265
p = strtok(p, ",");
266
do{
267
addargument(getplugin(name, plugins), p);
268
p = strtok(NULL, ",");
269
} while (p != NULL);
270
}
271
}
272
break;
273
case 'd':
274
if (arg != NULL){
275
getplugin(arg, plugins)->disabled = true;
276
}
277
break;
278
case 128:
279
plugindir = arg;
280
break;
281
case 129:
282
uid = (uid_t)strtol(arg, NULL, 10);
283
break;
284
case 130:
285
gid = (gid_t)strtol(arg, NULL, 10);
286
break;
287
case 131:
399
error_t parse_opt(int key, char *arg, __attribute__((unused))
400
struct argp_state *state){
401
switch(key){
402
char *tmp;
403
intmax_t tmpmax;
404
case 'g': /* --global-options */
405
if(arg != NULL){
406
char *plugin_option;
407
while((plugin_option = strsep(&arg, ",")) != NULL){
408
if(plugin_option[0] == '\0'){
409
continue;
410
}
411
if(not add_argument(getplugin(NULL), plugin_option)){
412
perror("add_argument");
413
return ARGP_ERR_UNKNOWN;
414
}
415
}
416
}
417
break;
418
case 'G': /* --global-env */
419
if(arg == NULL){
420
break;
421
}
422
if(not add_environment(getplugin(NULL), arg, true)){
423
perror("add_environment");
424
}
425
break;
426
case 'o': /* --options-for */
427
if(arg != NULL){
428
char *plugin_name = strsep(&arg, ":");
429
if(plugin_name[0] == '\0'){
430
break;
431
}
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(plugin_name), plugin_option)){
435
perror("add_argument");
436
return ARGP_ERR_UNKNOWN;
437
}
438
}
439
}
440
break;
441
case 'E': /* --env-for */
442
if(arg == NULL){
443
break;
444
}
445
{
446
char *envdef = strchr(arg, ':');
447
if(envdef == NULL){
448
break;
449
}
450
*envdef = '\0';
451
if(not add_environment(getplugin(arg), envdef+1, true)){
452
perror("add_environment");
453
}
454
}
455
break;
456
case 'd': /* --disable */
457
if(arg != NULL){
458
plugin *p = getplugin(arg);
459
if(p == NULL){
460
return ARGP_ERR_UNKNOWN;
461
}
462
p->disabled = true;
463
}
464
break;
465
case 'e': /* --enable */
466
if(arg != NULL){
467
plugin *p = getplugin(arg);
468
if(p == NULL){
469
return ARGP_ERR_UNKNOWN;
470
}
471
p->disabled = false;
472
}
473
break;
474
case 128: /* --plugin-dir */
475
free(plugindir);
476
plugindir = strdup(arg);
477
if(plugindir == NULL){
478
perror("strdup");
479
}
480
break;
481
case 129: /* --config-file */
482
/* This is already done by parse_opt_config_file() */
483
break;
484
case 130: /* --userid */
485
errno = 0;
486
tmpmax = strtoimax(arg, &tmp, 10);
487
if(errno != 0 or tmp == arg or *tmp != '\0'
488
or tmpmax != (uid_t)tmpmax){
489
fprintf(stderr, "Bad user ID number: \"%s\", using %"
490
PRIdMAX "\n", arg, (intmax_t)uid);
491
} else {
492
uid = (uid_t)tmpmax;
493
}
494
break;
495
case 131: /* --groupid */
496
errno = 0;
497
tmpmax = strtoimax(arg, &tmp, 10);
498
if(errno != 0 or tmp == arg or *tmp != '\0'
499
or tmpmax != (gid_t)tmpmax){
500
fprintf(stderr, "Bad group ID number: \"%s\", using %"
501
PRIdMAX "\n", arg, (intmax_t)gid);
502
} else {
503
gid = (gid_t)tmpmax;
504
}
505
break;
506
case 132: /* --debug */
288
507
debug = true;
289
508
break;
290
case ARGP_KEY_ARG:
291
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
292
argp_usage (state);
293
}
294
plus_options = arg;
295
break;
296
case ARGP_KEY_END:
297
break;
298
default:
299
return ARGP_ERR_UNKNOWN;
300
}
301
return 0;
302
}
303
304
plugin *plugin_list = NULL;
305
306
struct argp argp = { .options = options, .parser = parse_opt,
307
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
509
/*
510
* When adding more options before this line, remember to also add a
511
* "case" to the "parse_opt_config_file" function below.
512
*/
513
case ARGP_KEY_ARG:
514
/* Cryptsetup always passes an argument, which is an empty
515
string if "none" was specified in /etc/crypttab. So if
516
argument was empty, we ignore it silently. */
517
if(arg[0] != '\0'){
518
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
519
}
520
break;
521
case ARGP_KEY_END:
522
break;
523
default:
524
return ARGP_ERR_UNKNOWN;
525
}
526
return 0;
527
}
528
529
/* This option parser is the same as parse_opt() above, except it
530
ignores everything but the --config-file option. */
531
error_t parse_opt_config_file(int key, char *arg,
532
__attribute__((unused))
533
struct argp_state *state){
534
switch(key){
535
case 'g': /* --global-options */
536
case 'G': /* --global-env */
537
case 'o': /* --options-for */
538
case 'E': /* --env-for */
539
case 'd': /* --disable */
540
case 'e': /* --enable */
541
case 128: /* --plugin-dir */
542
break;
543
case 129: /* --config-file */
544
free(argfile);
545
argfile = strdup(arg);
546
if(argfile == NULL){
547
perror("strdup");
548
}
549
break;
550
case 130: /* --userid */
551
case 131: /* --groupid */
552
case 132: /* --debug */
553
case ARGP_KEY_ARG:
554
case ARGP_KEY_END:
555
break;
556
default:
557
return ARGP_ERR_UNKNOWN;
558
}
559
return 0;
560
}
561
562
struct argp argp = { .options = options,
563
.parser = parse_opt_config_file,
564
.args_doc = "",
308
565
.doc = "Mandos plugin runner -- Run plugins" };
309
566
310
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
311
if (ret == ARGP_ERR_UNKNOWN){
567
/* Parse using parse_opt_config_file() in order to get the custom
568
config file location, if any. */
569
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
570
if(ret == ARGP_ERR_UNKNOWN){
312
571
fprintf(stderr, "Unknown error while parsing arguments\n");
313
572
exitstatus = EXIT_FAILURE;
314
goto end;
315
}
316
317
if(plus_options){
318
/* This is a mangled argument in the form of
319
"+--option+--other-option=parameter+--yet-another-option", etc */
320
/* Make new argc and argv vars, and call argp_parse() again. */
321
plus_options++; /* skip the first '+' character */
322
const char delims[] = "+";
323
char *arg;
324
int new_argc = 1;
325
plus_argv = malloc(sizeof(char*) * 2);
326
if(plus_argv == NULL){
573
goto fallback;
574
}
575
576
/* Reset to the normal argument parser */
577
argp.parser = parse_opt;
578
579
/* Open the configfile if available */
580
if(argfile == NULL){
581
conffp = fopen(AFILE, "r");
582
} else {
583
conffp = fopen(argfile, "r");
584
}
585
if(conffp != NULL){
586
char *org_line = NULL;
587
char *p, *arg, *new_arg, *line;
588
size_t size = 0;
589
const char whitespace_delims[] = " \r\t\f\v\n";
590
const char comment_delim[] = "#";
591
592
custom_argc = 1;
593
custom_argv = malloc(sizeof(char*) * 2);
594
if(custom_argv == NULL){
327
595
perror("malloc");
328
596
exitstatus = EXIT_FAILURE;
329
goto end;
330
}
331
plus_argv[0] = argv[0];
332
plus_argv[1] = NULL;
333
arg = strtok(plus_options, delims); /* Get first argument */
334
while(arg != NULL){
335
new_argc++;
336
plus_argv = realloc(plus_argv, sizeof(char *)
337
* ((unsigned int) new_argc + 1));
338
if(plus_argv == NULL){
339
perror("realloc");
340
exitstatus = EXIT_FAILURE;
341
goto end;
342
}
343
plus_argv[new_argc-1] = arg;
344
plus_argv[new_argc] = NULL;
345
arg = strtok(NULL, delims); /* Get next argument */
346
}
347
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
348
if (ret == ARGP_ERR_UNKNOWN){
597
goto fallback;
598
}
599
custom_argv[0] = argv[0];
600
custom_argv[1] = NULL;
601
602
/* for each line in the config file, strip whitespace and ignore
603
commented text */
604
while(true){
605
sret = getline(&org_line, &size, conffp);
606
if(sret == -1){
607
break;
608
}
609
610
line = org_line;
611
arg = strsep(&line, comment_delim);
612
while((p = strsep(&arg, whitespace_delims)) != NULL){
613
if(p[0] == '\0'){
614
continue;
615
}
616
new_arg = strdup(p);
617
if(new_arg == NULL){
618
perror("strdup");
619
exitstatus = EXIT_FAILURE;
620
free(org_line);
621
goto fallback;
622
}
623
624
custom_argc += 1;
625
custom_argv = realloc(custom_argv, sizeof(char *)
626
* ((unsigned int) custom_argc + 1));
627
if(custom_argv == NULL){
628
perror("realloc");
629
exitstatus = EXIT_FAILURE;
630
free(org_line);
631
goto fallback;
632
}
633
custom_argv[custom_argc-1] = new_arg;
634
custom_argv[custom_argc] = NULL;
635
}
636
}
637
do {
638
ret = fclose(conffp);
639
} while(ret == EOF and errno == EINTR);
640
if(ret == EOF){
641
perror("fclose");
642
exitstatus = EXIT_FAILURE;
643
goto fallback;
644
}
645
free(org_line);
646
} else {
647
/* Check for harmful errors and go to fallback. Other errors might
648
not affect opening plugins */
649
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
650
perror("fopen");
651
exitstatus = EXIT_FAILURE;
652
goto fallback;
653
}
654
}
655
/* If there was any arguments from configuration file,
656
pass them to parser as command arguments */
657
if(custom_argv != NULL){
658
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
659
0, NULL);
660
if(ret == ARGP_ERR_UNKNOWN){
349
661
fprintf(stderr, "Unknown error while parsing arguments\n");
350
662
exitstatus = EXIT_FAILURE;
351
goto end;
663
goto fallback;
352
664
}
353
665
}
354
666
667
/* Parse actual command line arguments, to let them override the
668
config file */
669
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
670
if(ret == ARGP_ERR_UNKNOWN){
671
fprintf(stderr, "Unknown error while parsing arguments\n");
672
exitstatus = EXIT_FAILURE;
673
goto fallback;
674
}
675
355
676
if(debug){
356
677
for(plugin *p = plugin_list; p != NULL; p=p->next){
357
678
fprintf(stderr, "Plugin: %s has %d arguments\n",
359
680
for(char **a = p->argv; *a != NULL; a++){
360
681
fprintf(stderr, "\tArg: %s\n", *a);
361
682
}
683
fprintf(stderr, "...and %d environment variables\n", p->envc);
684
for(char **a = p->environ; *a != NULL; a++){
685
fprintf(stderr, "\t%s\n", *a);
686
}
362
687
}
363
688
}
364
689
690
/* Strip permissions down to nobody */
691
setgid(gid);
692
if(ret == -1){
693
perror("setgid");
694
}
365
695
ret = setuid(uid);
366
if (ret == -1){
696
if(ret == -1){
367
697
perror("setuid");
368
698
}
369
699
370
setgid(gid);
371
if (ret == -1){
372
perror("setgid");
700
if(plugindir == NULL){
701
dir = opendir(PDIR);
702
} else {
703
dir = opendir(plugindir);
373
704
}
374
705
375
dir = opendir(plugindir);
376
706
if(dir == NULL){
377
707
perror("Could not open plugin dir");
378
708
exitstatus = EXIT_FAILURE;
379
goto end;
709
goto fallback;
380
710
}
381
711
382
712
/* Set the FD_CLOEXEC flag on the directory, if possible */
387
717
if(ret < 0){
388
718
perror("set_cloexec_flag");
389
719
exitstatus = EXIT_FAILURE;
390
goto end;
720
goto fallback;
391
721
}
392
722
}
393
723
}
394
724
395
725
FD_ZERO(&rfds_all);
396
726
727
/* Read and execute any executable in the plugin directory*/
397
728
while(true){
398
dirst = readdir(dir);
729
do {
730
dirst = readdir(dir);
731
} while(dirst == NULL and errno == EINTR);
399
732
400
// All directory entries have been processed
733
/* All directory entries have been processed */
401
734
if(dirst == NULL){
402
if (errno == EBADF){
735
if(errno == EBADF){
403
736
perror("readdir");
404
737
exitstatus = EXIT_FAILURE;
405
goto end;
738
goto fallback;
406
739
}
407
740
break;
408
741
}
409
742
410
743
d_name_len = strlen(dirst->d_name);
411
744
412
// Ignore dotfiles, backup files and other junk
745
/* Ignore dotfiles, backup files and other junk */
413
746
{
414
747
bool bad_name = false;
415
748
417
750
418
751
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
419
752
".dpkg-old",
753
".dpkg-bak",
420
754
".dpkg-divert", NULL };
421
755
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
422
756
size_t pre_len = strlen(*pre);
430
764
break;
431
765
}
432
766
}
433
434
767
if(bad_name){
435
768
continue;
436
769
}
437
438
770
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
439
771
size_t suf_len = strlen(*suf);
440
772
if((d_name_len >= suf_len)
454
786
}
455
787
}
456
788
457
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
458
if (filename == NULL){
459
perror("malloc");
460
exitstatus = EXIT_FAILURE;
461
goto end;
462
}
463
strcpy(filename, plugindir); /* Spurious warning */
464
strcat(filename, "/"); /* Spurious warning */
465
strcat(filename, dirst->d_name); /* Spurious warning */
789
char *filename;
790
if(plugindir == NULL){
791
ret = TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
792
dirst->d_name));
793
} else {
794
ret = TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s", plugindir,
795
dirst->d_name));
796
}
797
if(ret < 0){
798
perror("asprintf");
799
continue;
800
}
466
801
467
ret = stat(filename, &st);
468
if (ret == -1){
802
ret = TEMP_FAILURE_RETRY(stat(filename, &st));
803
if(ret == -1){
469
804
perror("stat");
470
exitstatus = EXIT_FAILURE;
471
goto end;
805
free(filename);
806
continue;
472
807
}
473
808
474
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
809
/* Ignore non-executable files */
810
if(not S_ISREG(st.st_mode)
811
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
475
812
if(debug){
476
813
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
477
814
" with bad type or mode\n", filename);
479
816
free(filename);
480
817
continue;
481
818
}
482
if(getplugin(dirst->d_name, &plugin_list)->disabled){
819
820
plugin *p = getplugin(dirst->d_name);
821
if(p == NULL){
822
perror("getplugin");
823
free(filename);
824
continue;
825
}
826
if(p->disabled){
483
827
if(debug){
484
828
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
485
829
dirst->d_name);
487
831
free(filename);
488
832
continue;
489
833
}
490
plugin *p = getplugin(dirst->d_name, &plugin_list);
491
834
{
492
835
/* Add global arguments to argument list for this plugin */
493
plugin *g = getplugin(NULL, &plugin_list);
494
for(char **a = g->argv + 1; *a != NULL; a++){
495
addargument(p, *a);
496
}
497
}
498
int pipefd[2];
499
ret = pipe(pipefd);
500
if (ret == -1){
836
plugin *g = getplugin(NULL);
837
if(g != NULL){
838
for(char **a = g->argv + 1; *a != NULL; a++){
839
if(not add_argument(p, *a)){
840
perror("add_argument");
841
}
842
}
843
/* Add global environment variables */
844
for(char **e = g->environ; *e != NULL; e++){
845
if(not add_environment(p, *e, false)){
846
perror("add_environment");
847
}
848
}
849
}
850
}
851
/* If this plugin has any environment variables, we will call
852
using execve and need to duplicate the environment from this
853
process, too. */
854
if(p->environ[0] != NULL){
855
for(char **e = environ; *e != NULL; e++){
856
if(not add_environment(p, *e, false)){
857
perror("add_environment");
858
}
859
}
860
}
861
862
int pipefd[2];
863
ret = TEMP_FAILURE_RETRY(pipe(pipefd));
864
if(ret == -1){
501
865
perror("pipe");
502
866
exitstatus = EXIT_FAILURE;
503
goto end;
867
goto fallback;
504
868
}
869
/* Ask OS to automatic close the pipe on exec */
505
870
ret = set_cloexec_flag(pipefd[0]);
506
871
if(ret < 0){
507
872
perror("set_cloexec_flag");
508
873
exitstatus = EXIT_FAILURE;
509
goto end;
874
goto fallback;
510
875
}
511
876
ret = set_cloexec_flag(pipefd[1]);
512
877
if(ret < 0){
513
878
perror("set_cloexec_flag");
514
879
exitstatus = EXIT_FAILURE;
515
goto end;
880
goto fallback;
516
881
}
517
882
/* Block SIGCHLD until process is safely in process list */
518
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
883
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
884
&sigchld_action.sa_mask,
885
NULL));
519
886
if(ret < 0){
520
887
perror("sigprocmask");
521
888
exitstatus = EXIT_FAILURE;
522
goto end;
523
}
524
// Starting a new process to be watched
525
pid_t pid = fork();
889
goto fallback;
890
}
891
/* Starting a new process to be watched */
892
pid_t pid;
893
do {
894
pid = fork();
895
} while(pid == -1 and errno == EINTR);
896
if(pid == -1){
897
perror("fork");
898
exitstatus = EXIT_FAILURE;
899
goto fallback;
900
}
526
901
if(pid == 0){
527
902
/* this is the child process */
528
903
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
530
905
perror("sigaction");
531
906
_exit(EXIT_FAILURE);
532
907
}
533
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
534
909
if(ret < 0){
535
910
perror("sigprocmask");
536
911
_exit(EXIT_FAILURE);
537
912
}
538
913
539
914
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
540
915
if(ret == -1){
541
916
perror("dup2");
547
922
above and must now close it manually here. */
548
923
closedir(dir);
549
924
}
550
if(execv(filename, p->argv) < 0){
551
perror("execv");
552
_exit(EXIT_FAILURE);
925
if(p->environ[0] == NULL){
926
if(execv(filename, p->argv) < 0){
927
perror("execv");
928
_exit(EXIT_FAILURE);
929
}
930
} else {
931
if(execve(filename, p->argv, p->environ) < 0){
932
perror("execve");
933
_exit(EXIT_FAILURE);
934
}
553
935
}
554
936
/* no return */
555
937
}
556
/* parent process */
938
/* Parent process */
939
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
940
pipe */
557
941
free(filename);
558
close(pipefd[1]); /* close unused write end of pipe */
559
process *new_process = malloc(sizeof(process));
560
if (new_process == NULL){
561
perror("malloc");
562
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
942
plugin *new_plugin = getplugin(dirst->d_name);
943
if(new_plugin == NULL){
944
perror("getplugin");
945
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
946
&sigchld_action.sa_mask,
947
NULL));
563
948
if(ret < 0){
564
perror("sigprocmask");
949
perror("sigprocmask");
565
950
}
566
951
exitstatus = EXIT_FAILURE;
567
goto end;
952
goto fallback;
568
953
}
569
954
570
*new_process = (struct process){ .pid = pid,
571
.fd = pipefd[0],
572
.next = process_list };
573
// List handling
574
process_list = new_process;
955
new_plugin->pid = pid;
956
new_plugin->fd = pipefd[0];
957
575
958
/* Unblock SIGCHLD so signal handler can be run if this process
576
959
has already completed */
577
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
960
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
578
963
if(ret < 0){
579
964
perror("sigprocmask");
580
965
exitstatus = EXIT_FAILURE;
581
goto end;
582
}
583
584
FD_SET(new_process->fd, &rfds_all);
585
586
if (maxfd < new_process->fd){
587
maxfd = new_process->fd;
588
}
589
590
}
591
592
/* Free the plugin list */
593
for(plugin *next; plugin_list != NULL; plugin_list = next){
594
next = plugin_list->next;
595
free(plugin_list->argv);
596
free(plugin_list);
597
}
598
599
closedir(dir);
966
goto fallback;
967
}
968
969
FD_SET(new_plugin->fd, &rfds_all);
970
971
if(maxfd < new_plugin->fd){
972
maxfd = new_plugin->fd;
973
}
974
}
975
976
TEMP_FAILURE_RETRY(closedir(dir));
600
977
dir = NULL;
601
602
if (process_list == NULL){
603
fprintf(stderr, "No plugin processes started. Incorrect plugin"
604
" directory?\n");
605
process_list = NULL;
978
free_plugin(getplugin(NULL));
979
980
for(plugin *p = plugin_list; p != NULL; p = p->next){
981
if(p->pid != 0){
982
break;
983
}
984
if(p->next == NULL){
985
fprintf(stderr, "No plugin processes started. Incorrect plugin"
986
" directory?\n");
987
free_plugin_list();
988
}
606
989
}
607
while(process_list){
990
991
/* Main loop while running plugins exist */
992
while(plugin_list){
608
993
fd_set rfds = rfds_all;
609
994
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
610
if (select_ret == -1){
995
if(select_ret == -1 and errno != EINTR){
611
996
perror("select");
612
997
exitstatus = EXIT_FAILURE;
613
goto end;
998
goto fallback;
614
999
}
615
1000
/* OK, now either a process completed, or something can be read
616
1001
from one of them */
617
for(process *proc = process_list; proc ; proc = proc->next){
1002
for(plugin *proc = plugin_list; proc != NULL;){
618
1003
/* Is this process completely done? */
619
if(proc->eof and proc->completed){
1004
if(proc->completed and proc->eof){
620
1005
/* Only accept the plugin output if it exited cleanly */
621
1006
if(not WIFEXITED(proc->status)
622
1007
or WEXITSTATUS(proc->status) != 0){
623
1008
/* Bad exit by plugin */
1009
624
1010
if(debug){
625
1011
if(WIFEXITED(proc->status)){
626
fprintf(stderr, "Plugin %u exited with status %d\n",
627
(unsigned int) (proc->pid),
1012
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1013
" status %d\n", proc->name,
1014
(intmax_t) (proc->pid),
628
1015
WEXITSTATUS(proc->status));
629
} else if(WIFSIGNALED(proc->status)) {
630
fprintf(stderr, "Plugin %u killed by signal %d\n",
631
(unsigned int) (proc->pid),
632
WTERMSIG(proc->status));
1016
} else if(WIFSIGNALED(proc->status)){
1017
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1018
" signal %d: %s\n", proc->name,
1019
(intmax_t) (proc->pid),
1020
WTERMSIG(proc->status),
1021
strsignal(WTERMSIG(proc->status)));
633
1022
} else if(WCOREDUMP(proc->status)){
634
fprintf(stderr, "Plugin %d dumped core\n",
635
(unsigned int) (proc->pid));
1023
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1024
" core\n", proc->name, (intmax_t) (proc->pid));
636
1025
}
637
1026
}
1027
638
1028
/* Remove the plugin */
639
1029
FD_CLR(proc->fd, &rfds_all);
1030
640
1031
/* Block signal while modifying process_list */
641
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1032
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1033
&sigchld_action.sa_mask,
1034
NULL));
642
1035
if(ret < 0){
643
1036
perror("sigprocmask");
644
1037
exitstatus = EXIT_FAILURE;
645
goto end;
646
}
647
/* Delete this process entry from the list */
648
if(process_list == proc){
649
/* First one - simple */
650
process_list = proc->next;
651
} else {
652
/* Second one or later */
653
for(process *p = process_list; p != NULL; p = p->next){
654
if(p->next == proc){
655
p->next = proc->next;
656
break;
657
}
658
}
659
}
1038
goto fallback;
1039
}
1040
1041
plugin *next_plugin = proc->next;
1042
free_plugin(proc);
1043
proc = next_plugin;
1044
660
1045
/* We are done modifying process list, so unblock signal */
661
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
662
NULL);
1046
ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1047
&sigchld_action.sa_mask,
1048
NULL));
663
1049
if(ret < 0){
664
1050
perror("sigprocmask");
665
}
666
free(proc->buffer);
667
free(proc);
668
/* We deleted this process from the list, so we can't go
669
proc->next. Therefore, start over from the beginning of
670
the process list */
671
break;
1051
exitstatus = EXIT_FAILURE;
1052
goto fallback;
1053
}
1054
1055
if(plugin_list == NULL){
1056
break;
1057
}
1058
1059
continue;
672
1060
}
1061
673
1062
/* This process exited nicely, so print its buffer */
674
675
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1063
1064
bool bret = print_out_password(proc->buffer,
1065
proc->buffer_length);
676
1066
if(not bret){
677
1067
perror("print_out_password");
678
1068
exitstatus = EXIT_FAILURE;
679
1069
}
680
goto end;
1070
goto fallback;
681
1071
}
1072
682
1073
/* This process has not completed. Does it have any output? */
683
1074
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
684
1075
/* This process had nothing to say at this time */
1076
proc = proc->next;
685
1077
continue;
686
1078
}
687
1079
/* Before reading, make the process' data buffer large enough */
688
1080
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
689
1081
proc->buffer = realloc(proc->buffer, proc->buffer_size
690
1082
+ (size_t) BUFFER_SIZE);
691
if (proc->buffer == NULL){
1083
if(proc->buffer == NULL){
692
1084
perror("malloc");
693
1085
exitstatus = EXIT_FAILURE;
694
goto end;
1086
goto fallback;
695
1087
}
696
1088
proc->buffer_size += BUFFER_SIZE;
697
1089
}
698
1090
/* Read from the process */
699
ret = read(proc->fd, proc->buffer + proc->buffer_length,
700
BUFFER_SIZE);
701
if(ret < 0){
1091
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1092
proc->buffer
1093
+ proc->buffer_length,
1094
BUFFER_SIZE));
1095
if(sret < 0){
702
1096
/* Read error from this process; ignore the error */
1097
proc = proc->next;
703
1098
continue;
704
1099
}
705
if(ret == 0){
1100
if(sret == 0){
706
1101
/* got EOF */
707
1102
proc->eof = true;
708
1103
} else {
709
proc->buffer_length += (size_t) ret;
1104
proc->buffer_length += (size_t) sret;
710
1105
}
711
1106
}
712
1107
}
713
714
715
end:
716
717
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
718
/* Fallback if all plugins failed or an error occured */
1108
1109
1110
fallback:
1111
1112
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1113
/* Fallback if all plugins failed, none are found or an error
1114
occured */
719
1115
bool bret;
720
1116
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
721
1117
char *passwordbuffer = getpass("Password: ");
722
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1118
size_t len = strlen(passwordbuffer);
1119
/* Strip trailing newline */
1120
if(len > 0 and passwordbuffer[len-1] == '\n'){
1121
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1122
len--;
1123
}
1124
bret = print_out_password(passwordbuffer, len);
723
1125
if(not bret){
724
1126
perror("print_out_password");
725
1127
exitstatus = EXIT_FAILURE;
726
goto end;
727
1128
}
728
1129
}
729
1130
730
1131
/* Restore old signal handler */
731
sigaction(SIGCHLD, &old_sigchld_action, NULL);
732
733
free(plus_argv);
734
735
/* Free the plugin list */
736
for(plugin *next; plugin_list != NULL; plugin_list = next){
737
next = plugin_list->next;
738
free(plugin_list->argv);
739
free(plugin_list);
1132
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1133
if(ret == -1){
1134
perror("sigaction");
1135
exitstatus = EXIT_FAILURE;
1136
}
1137
1138
if(custom_argv != NULL){
1139
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1140
free(*arg);
1141
}
1142
free(custom_argv);
740
1143
}
741
1144
742
1145
if(dir != NULL){
743
1146
closedir(dir);
744
1147
}
745
1148
746
/* Free the process list and kill the processes */
747
for(process *next; process_list != NULL; process_list = next){
748
next = process_list->next;
749
close(process_list->fd);
750
ret = kill(process_list->pid, SIGTERM);
751
if(ret == -1 and errno != ESRCH){
752
/* set-uid proccesses migth not get closed */
753
perror("kill");
1149
/* Kill the processes */
1150
for(plugin *p = plugin_list; p != NULL; p = p->next){
1151
if(p->pid != 0){
1152
close(p->fd);
1153
ret = kill(p->pid, SIGTERM);
1154
if(ret == -1 and errno != ESRCH){
1155
/* Set-uid proccesses might not get closed */
1156
perror("kill");
1157
}
754
1158
}
755
free(process_list->buffer);
756
free(process_list);
757
1159
}
758
1160
759
1161
/* Wait for any remaining child processes to terminate */
760
do{
1162
do {
761
1163
ret = wait(NULL);
762
1164
} while(ret >= 0);
763
1165
if(errno != ECHILD){
764
1166
perror("wait");
765
1167
}
766
1168
1169
free_plugin_list();
1170
1171
free(plugindir);
1172
free(argfile);
1173
767
1174
return exitstatus;
768
1175
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0