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- Committer: Teddy Hogeborn
- Date: 2009-10-22 00:05:01 UTC
- Revision ID: teddy@fukt.bsnet.se-20091022000501-g792e99q5g1wkyet
Merge from release branch.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- 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
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
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 */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
31
#include <stdio.h> /* perror, 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() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
58
61
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
60
64
#include <signal.h> /* struct sigaction, sigemptyset(),
61
65
sigaddset(), sigaction(),
62
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
63
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
64
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
65
71
66
72
#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
69
const char *argp_program_version = "plugin-runner 1.0";
73
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{
75
pid_t pid;
76
int fd;
77
char *buffer;
78
size_t buffer_size;
79
size_t buffer_length;
80
bool eof;
81
bool completed;
82
int status;
83
struct process *next;
84
} process;
85
86
80
typedef struct plugin{
87
81
char *name; /* can be NULL or any plugin name */
88
82
char **argv;
90
84
char **environ;
91
85
int envc;
92
86
bool disabled;
87
88
/* Variables used for running processes*/
89
pid_t pid;
90
int fd;
91
char *buffer;
92
size_t buffer_size;
93
size_t buffer_length;
94
bool eof;
95
volatile sig_atomic_t completed;
96
int status;
93
97
struct plugin *next;
94
98
} plugin;
95
99
96
static plugin *getplugin(char *name, plugin **plugin_list){
97
for (plugin *p = *plugin_list; p != NULL; p = p->next){
98
if ((p->name == name)
99
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))){
100
109
return p;
101
110
}
102
111
}
103
112
/* Create a new plugin */
104
plugin *new_plugin = malloc(sizeof(plugin));
105
if (new_plugin == NULL){
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){
106
118
return NULL;
107
119
}
108
*new_plugin = (plugin) { .name = name,
109
.argc = 1,
110
.envc = 0,
111
.disabled = false,
112
.next = *plugin_list };
113
114
new_plugin->argv = malloc(sizeof(char *) * 2);
115
if (new_plugin->argv == NULL){
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);
116
141
free(new_plugin);
117
142
return NULL;
118
143
}
119
new_plugin->argv[0] = name;
144
new_plugin->argv[0] = copy_name;
120
145
new_plugin->argv[1] = NULL;
121
122
new_plugin->environ = malloc(sizeof(char *));
146
147
do {
148
new_plugin->environ = malloc(sizeof(char *));
149
} while(new_plugin->environ == NULL and errno == EINTR);
123
150
if(new_plugin->environ == NULL){
151
free(copy_name);
124
152
free(new_plugin->argv);
125
153
free(new_plugin);
126
154
return NULL;
127
155
}
128
156
new_plugin->environ[0] = NULL;
157
129
158
/* Append the new plugin to the list */
130
*plugin_list = new_plugin;
159
plugin_list = new_plugin;
131
160
return new_plugin;
132
161
}
133
162
135
164
static bool add_to_char_array(const char *new, char ***array,
136
165
int *len){
137
166
/* Resize the pointed-to array to hold one more pointer */
138
*array = realloc(*array, sizeof(char *)
139
* (size_t) ((*len) + 2));
167
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
140
171
/* Malloc check */
141
172
if(*array == NULL){
142
173
return false;
143
174
}
144
175
/* Make a copy of the new string */
145
char *copy = strdup(new);
176
char *copy;
177
do {
178
copy = strdup(new);
179
} while(copy == NULL and errno == EINTR);
146
180
if(copy == NULL){
147
181
return false;
148
182
}
163
197
}
164
198
165
199
/* Add to a plugin's environment */
166
static bool add_environment(plugin *p, const char *def){
200
static bool add_environment(plugin *p, const char *def, bool replace){
167
201
if(p == NULL){
168
202
return false;
169
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
}
170
224
return add_to_char_array(def, &(p->environ), &(p->envc));
171
225
}
172
226
173
174
227
/*
175
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
176
229
* Descriptor Flags".
177
* *Note File Descriptor Flags:(libc)Descriptor Flags.
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
178
231
*/
179
static int set_cloexec_flag(int fd)
180
{
181
int ret = fcntl(fd, F_GETFD, 0);
232
static int set_cloexec_flag(int fd){
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
182
234
/* If reading the flags failed, return error indication now. */
183
235
if(ret < 0){
184
236
return ret;
185
237
}
186
238
/* Store modified flag word in the descriptor. */
187
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
240
ret | FD_CLOEXEC));
188
241
}
189
242
190
process *process_list = NULL;
191
243
192
/* Mark a process as completed when it exits, and save its exit
244
/* Mark processes as completed when they exit, and save their exit
193
245
status. */
194
void handle_sigchld(__attribute__((unused)) int sig){
195
process *proc = process_list;
196
int status;
197
pid_t pid = wait(&status);
198
if(pid == -1){
199
perror("wait");
200
return;
201
}
202
while(proc != NULL and proc->pid != pid){
203
proc = proc->next;
204
}
205
if(proc == NULL){
206
/* Process not found in process list */
207
return;
208
}
209
proc->status = status;
210
proc->completed = true;
246
static void handle_sigchld(__attribute__((unused)) int sig){
247
int old_errno = errno;
248
while(true){
249
plugin *proc = plugin_list;
250
int status;
251
pid_t pid = waitpid(-1, &status, WNOHANG);
252
if(pid == 0){
253
/* Only still running child processes */
254
break;
255
}
256
if(pid == -1){
257
if(errno == ECHILD){
258
/* No child processes */
259
break;
260
}
261
perror("waitpid");
262
}
263
264
/* A child exited, find it in process_list */
265
while(proc != NULL and proc->pid != pid){
266
proc = proc->next;
267
}
268
if(proc == NULL){
269
/* Process not found in process list */
270
continue;
271
}
272
proc->status = status;
273
proc->completed = 1;
274
}
275
errno = old_errno;
211
276
}
212
277
213
bool print_out_password(const char *buffer, size_t length){
278
/* Prints out a password to stdout */
279
static bool print_out_password(const char *buffer, size_t length){
214
280
ssize_t ret;
215
if(length>0 and buffer[length-1] == '\n'){
216
length--;
217
}
218
281
for(size_t written = 0; written < length; written += (size_t)ret){
219
282
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
220
283
length - written));
225
288
return true;
226
289
}
227
290
228
char **add_to_argv(char **argv, int *argc, char *arg){
229
if (argv == NULL){
230
*argc = 1;
231
argv = malloc(sizeof(char*) * 2);
232
if(argv == NULL){
233
return NULL;
291
/* Removes and free a plugin from the plugin list */
292
static void free_plugin(plugin *plugin_node){
293
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
295
free(*arg);
296
}
297
free(plugin_node->argv);
298
for(char **env = plugin_node->environ; *env != NULL; env++){
299
free(*env);
300
}
301
free(plugin_node->environ);
302
free(plugin_node->buffer);
303
304
/* Removes the plugin from the singly-linked list */
305
if(plugin_node == plugin_list){
306
/* First one - simple */
307
plugin_list = plugin_list->next;
308
} else {
309
/* Second one or later */
310
for(plugin *p = plugin_list; p != NULL; p = p->next){
311
if(p->next == plugin_node){
312
p->next = plugin_node->next;
313
break;
314
}
234
315
}
235
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
236
argv[1] = NULL;
237
}
238
*argc += 1;
239
argv = realloc(argv, sizeof(char *)
240
* ((unsigned int) *argc + 1));
241
if(argv == NULL){
242
return NULL;
243
}
244
argv[*argc-1] = arg;
245
argv[*argc] = NULL;
246
return argv;
316
}
317
318
free(plugin_node);
319
}
320
321
static void free_plugin_list(void){
322
while(plugin_list != NULL){
323
free_plugin(plugin_list);
324
}
247
325
}
248
326
249
327
int main(int argc, char *argv[]){
250
const char *plugindir = "/lib/mandos/plugins.d";
251
const char *argfile = ARGFILE;
328
char *plugindir = NULL;
329
char *argfile = NULL;
252
330
FILE *conffp;
253
331
size_t d_name_len;
254
332
DIR *dir = NULL;
256
334
struct stat st;
257
335
fd_set rfds_all;
258
336
int ret, maxfd = 0;
337
ssize_t sret;
259
338
uid_t uid = 65534;
260
339
gid_t gid = 65534;
261
340
bool debug = false;
269
348
/* Establish a signal handler */
270
349
sigemptyset(&sigchld_action.sa_mask);
271
350
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
272
if(ret < 0){
351
if(ret == -1){
273
352
perror("sigaddset");
274
exit(EXIT_FAILURE);
353
exitstatus = EXIT_FAILURE;
354
goto fallback;
275
355
}
276
356
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
277
if(ret < 0){
357
if(ret == -1){
278
358
perror("sigaction");
279
exit(EXIT_FAILURE);
359
exitstatus = EXIT_FAILURE;
360
goto fallback;
280
361
}
281
362
282
363
/* The options we understand. */
284
365
{ .name = "global-options", .key = 'g',
285
366
.arg = "OPTION[,OPTION[,...]]",
286
367
.doc = "Options passed to all plugins" },
287
{ .name = "global-envs", .key = 'e',
368
{ .name = "global-env", .key = 'G',
288
369
.arg = "VAR=value",
289
370
.doc = "Environment variable passed to all plugins" },
290
371
{ .name = "options-for", .key = 'o',
291
372
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
292
373
.doc = "Options passed only to specified plugin" },
293
{ .name = "envs-for", .key = 'f',
374
{ .name = "env-for", .key = 'E',
294
375
.arg = "PLUGIN:ENV=value",
295
376
.doc = "Environment variable passed to specified plugin" },
296
377
{ .name = "disable", .key = 'd',
297
378
.arg = "PLUGIN",
298
379
.doc = "Disable a specific plugin", .group = 1 },
380
{ .name = "enable", .key = 'e',
381
.arg = "PLUGIN",
382
.doc = "Enable a specific plugin", .group = 1 },
299
383
{ .name = "plugin-dir", .key = 128,
300
384
.arg = "DIRECTORY",
301
385
.doc = "Specify a different plugin directory", .group = 2 },
302
{ .name = "userid", .key = 129,
303
.arg = "ID", .flags = 0,
304
.doc = "User ID the plugins will run as", .group = 2 },
305
{ .name = "groupid", .key = 130,
306
.arg = "ID", .flags = 0,
307
.doc = "Group ID the plugins will run as", .group = 2 },
308
{ .name = "debug", .key = 131,
309
.doc = "Debug mode", .group = 3 },
386
{ .name = "config-file", .key = 129,
387
.arg = "FILE",
388
.doc = "Specify a different configuration file", .group = 2 },
389
{ .name = "userid", .key = 130,
390
.arg = "ID", .flags = 0,
391
.doc = "User ID the plugins will run as", .group = 3 },
392
{ .name = "groupid", .key = 131,
393
.arg = "ID", .flags = 0,
394
.doc = "Group ID the plugins will run as", .group = 3 },
395
{ .name = "debug", .key = 132,
396
.doc = "Debug mode", .group = 4 },
310
397
{ .name = NULL }
311
398
};
312
399
313
error_t parse_opt (int key, char *arg, struct argp_state *state) {
314
/* Get the INPUT argument from `argp_parse', which we know is a
315
pointer to our plugin list pointer. */
316
plugin **plugins = state->input;
317
switch (key) {
318
case 'g':
319
if (arg != NULL){
320
char *p;
321
while((p = strsep(&arg, ",")) != NULL){
322
if(p[0] == '\0'){
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
402
switch(key){
403
char *tmp;
404
intmax_t tmpmax;
405
case 'g': /* --global-options */
406
if(arg != NULL){
407
char *plugin_option;
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
323
410
continue;
324
411
}
325
if(not add_argument(getplugin(NULL, plugins), p)){
412
if(not add_argument(getplugin(NULL), plugin_option)){
326
413
perror("add_argument");
327
414
return ARGP_ERR_UNKNOWN;
328
415
}
329
416
}
330
417
}
331
418
break;
332
case 'e':
419
case 'G': /* --global-env */
333
420
if(arg == NULL){
334
421
break;
335
422
}
336
{
337
char *envdef = strdup(arg);
338
if(envdef == NULL){
339
break;
340
}
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
342
perror("add_environment");
343
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
344
425
}
345
426
break;
346
case 'o':
347
if (arg != NULL){
348
char *p_name = strsep(&arg, ":");
349
if(p_name[0] == '\0'){
350
break;
351
}
352
char *opt = strsep(&arg, ":");
353
if(opt[0] == '\0'){
354
break;
355
}
356
if(opt != NULL){
357
char *p;
358
while((p = strsep(&opt, ",")) != NULL){
359
if(p[0] == '\0'){
360
continue;
361
}
362
if(not add_argument(getplugin(p_name, plugins), p)){
363
perror("add_argument");
364
return ARGP_ERR_UNKNOWN;
365
}
427
case 'o': /* --options-for */
428
if(arg != NULL){
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
431
break;
432
}
433
char *plugin_option;
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
436
perror("add_argument");
437
return ARGP_ERR_UNKNOWN;
366
438
}
367
439
}
368
440
}
369
441
break;
370
case 'f':
442
case 'E': /* --env-for */
371
443
if(arg == NULL){
372
444
break;
373
445
}
376
448
if(envdef == NULL){
377
449
break;
378
450
}
379
char *p_name = strndup(arg, (size_t) (envdef-arg));
380
if(p_name == NULL){
381
break;
382
}
383
envdef++;
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
451
*envdef = '\0';
452
if(not add_environment(getplugin(arg), envdef+1, true)){
385
453
perror("add_environment");
386
454
}
387
455
}
388
456
break;
389
case 'd':
390
if (arg != NULL){
391
plugin *p = getplugin(arg, plugins);
457
case 'd': /* --disable */
458
if(arg != NULL){
459
plugin *p = getplugin(arg);
392
460
if(p == NULL){
393
461
return ARGP_ERR_UNKNOWN;
394
462
}
395
463
p->disabled = true;
396
464
}
397
465
break;
398
case 128:
399
plugindir = arg;
400
break;
401
case 129:
402
uid = (uid_t)strtol(arg, NULL, 10);
403
break;
404
case 130:
405
gid = (gid_t)strtol(arg, NULL, 10);
406
break;
407
case 131:
466
case 'e': /* --enable */
467
if(arg != NULL){
468
plugin *p = getplugin(arg);
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
471
}
472
p->disabled = false;
473
}
474
break;
475
case 128: /* --plugin-dir */
476
free(plugindir);
477
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
480
}
481
break;
482
case 129: /* --config-file */
483
/* This is already done by parse_opt_config_file() */
484
break;
485
case 130: /* --userid */
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
488
if(errno != 0 or tmp == arg or *tmp != '\0'
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
494
}
495
break;
496
case 131: /* --groupid */
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
499
if(errno != 0 or tmp == arg or *tmp != '\0'
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
505
}
506
break;
507
case 132: /* --debug */
408
508
debug = true;
409
509
break;
410
case ARGP_KEY_ARG:
411
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
412
break;
413
case ARGP_KEY_END:
414
break;
415
default:
416
return ARGP_ERR_UNKNOWN;
417
}
418
return 0;
419
}
420
421
plugin *plugin_list = NULL;
422
423
struct argp argp = { .options = options, .parser = parse_opt,
424
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
510
/*
511
* When adding more options before this line, remember to also add a
512
* "case" to the "parse_opt_config_file" function below.
513
*/
514
case ARGP_KEY_ARG:
515
/* Cryptsetup always passes an argument, which is an empty
516
string if "none" was specified in /etc/crypttab. So if
517
argument was empty, we ignore it silently. */
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
520
}
521
break;
522
case ARGP_KEY_END:
523
break;
524
default:
525
return ARGP_ERR_UNKNOWN;
526
}
527
return 0;
528
}
529
530
/* This option parser is the same as parse_opt() above, except it
531
ignores everything but the --config-file option. */
532
error_t parse_opt_config_file(int key, char *arg,
533
__attribute__((unused))
534
struct argp_state *state){
535
switch(key){
536
case 'g': /* --global-options */
537
case 'G': /* --global-env */
538
case 'o': /* --options-for */
539
case 'E': /* --env-for */
540
case 'd': /* --disable */
541
case 'e': /* --enable */
542
case 128: /* --plugin-dir */
543
break;
544
case 129: /* --config-file */
545
free(argfile);
546
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
549
}
550
break;
551
case 130: /* --userid */
552
case 131: /* --groupid */
553
case 132: /* --debug */
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
556
break;
557
default:
558
return ARGP_ERR_UNKNOWN;
559
}
560
return 0;
561
}
562
563
struct argp argp = { .options = options,
564
.parser = parse_opt_config_file,
565
.args_doc = "",
425
566
.doc = "Mandos plugin runner -- Run plugins" };
426
567
427
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
428
if (ret == ARGP_ERR_UNKNOWN){
568
/* Parse using parse_opt_config_file() in order to get the custom
569
config file location, if any. */
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
429
572
fprintf(stderr, "Unknown error while parsing arguments\n");
430
573
exitstatus = EXIT_FAILURE;
431
goto end;
432
}
433
434
conffp = fopen(argfile, "r");
574
goto fallback;
575
}
576
577
/* Reset to the normal argument parser */
578
argp.parser = parse_opt;
579
580
/* Open the configfile if available */
581
if(argfile == NULL){
582
conffp = fopen(AFILE, "r");
583
} else {
584
conffp = fopen(argfile, "r");
585
}
435
586
if(conffp != NULL){
436
587
char *org_line = NULL;
588
char *p, *arg, *new_arg, *line;
437
589
size_t size = 0;
438
ssize_t sret;
439
char *p, *arg, *new_arg, *line;
440
590
const char whitespace_delims[] = " \r\t\f\v\n";
441
591
const char comment_delim[] = "#";
442
592
593
custom_argc = 1;
594
custom_argv = malloc(sizeof(char*) * 2);
595
if(custom_argv == NULL){
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
598
goto fallback;
599
}
600
custom_argv[0] = argv[0];
601
custom_argv[1] = NULL;
602
603
/* for each line in the config file, strip whitespace and ignore
604
commented text */
443
605
while(true){
444
606
sret = getline(&org_line, &size, conffp);
445
607
if(sret == -1){
446
608
break;
447
609
}
448
610
449
611
line = org_line;
450
612
arg = strsep(&line, comment_delim);
451
613
while((p = strsep(&arg, whitespace_delims)) != NULL){
453
615
continue;
454
616
}
455
617
new_arg = strdup(p);
456
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
457
if (custom_argv == NULL){
458
perror("add_to_argv");
459
exitstatus = EXIT_FAILURE;
460
goto end;
461
}
618
if(new_arg == NULL){
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
621
free(org_line);
622
goto fallback;
623
}
624
625
custom_argc += 1;
626
custom_argv = realloc(custom_argv, sizeof(char *)
627
* ((unsigned int) custom_argc + 1));
628
if(custom_argv == NULL){
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
631
free(org_line);
632
goto fallback;
633
}
634
custom_argv[custom_argc-1] = new_arg;
635
custom_argv[custom_argc] = NULL;
462
636
}
463
637
}
638
do {
639
ret = fclose(conffp);
640
} while(ret == EOF and errno == EINTR);
641
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
644
goto fallback;
645
}
464
646
free(org_line);
465
} else{
647
} else {
466
648
/* Check for harmful errors and go to fallback. Other errors might
467
649
not affect opening plugins */
468
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
469
651
perror("fopen");
470
652
exitstatus = EXIT_FAILURE;
471
goto end;
653
goto fallback;
472
654
}
473
655
}
474
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
475
658
if(custom_argv != NULL){
476
custom_argv[0] = argv[0];
477
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
478
if (ret == ARGP_ERR_UNKNOWN){
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
660
0, NULL);
661
if(ret == ARGP_ERR_UNKNOWN){
479
662
fprintf(stderr, "Unknown error while parsing arguments\n");
480
663
exitstatus = EXIT_FAILURE;
481
goto end;
664
goto fallback;
482
665
}
483
666
}
484
667
668
/* Parse actual command line arguments, to let them override the
669
config file */
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
672
fprintf(stderr, "Unknown error while parsing arguments\n");
673
exitstatus = EXIT_FAILURE;
674
goto fallback;
675
}
676
485
677
if(debug){
486
678
for(plugin *p = plugin_list; p != NULL; p=p->next){
487
679
fprintf(stderr, "Plugin: %s has %d arguments\n",
489
681
for(char **a = p->argv; *a != NULL; a++){
490
682
fprintf(stderr, "\tArg: %s\n", *a);
491
683
}
492
fprintf(stderr, "...and %u environment variables\n", p->envc);
684
fprintf(stderr, "...and %d environment variables\n", p->envc);
493
685
for(char **a = p->environ; *a != NULL; a++){
494
686
fprintf(stderr, "\t%s\n", *a);
495
687
}
496
688
}
497
689
}
498
690
691
/* Strip permissions down to nobody */
692
setgid(gid);
693
if(ret == -1){
694
perror("setgid");
695
}
499
696
ret = setuid(uid);
500
if (ret == -1){
697
if(ret == -1){
501
698
perror("setuid");
502
699
}
503
700
504
setgid(gid);
505
if (ret == -1){
506
perror("setgid");
507
}
508
509
dir = opendir(plugindir);
510
if(dir == NULL){
511
perror("Could not open plugin dir");
512
exitstatus = EXIT_FAILURE;
513
goto end;
514
}
515
516
/* Set the FD_CLOEXEC flag on the directory, if possible */
701
/* Open plugin directory with close_on_exec flag */
517
702
{
518
int dir_fd = dirfd(dir);
519
if(dir_fd >= 0){
520
ret = set_cloexec_flag(dir_fd);
521
if(ret < 0){
522
perror("set_cloexec_flag");
523
exitstatus = EXIT_FAILURE;
524
goto end;
525
}
703
int dir_fd = -1;
704
if(plugindir == NULL){
705
dir_fd = open(PDIR, O_RDONLY |
706
#ifdef O_CLOEXEC
707
O_CLOEXEC
708
#else /* not O_CLOEXEC */
709
0
710
#endif /* not O_CLOEXEC */
711
);
712
} else {
713
dir_fd = open(plugindir, O_RDONLY |
714
#ifdef O_CLOEXEC
715
O_CLOEXEC
716
#else /* not O_CLOEXEC */
717
0
718
#endif /* not O_CLOEXEC */
719
);
720
}
721
if(dir_fd == -1){
722
perror("Could not open plugin dir");
723
exitstatus = EXIT_FAILURE;
724
goto fallback;
725
}
726
727
#ifndef O_CLOEXEC
728
/* Set the FD_CLOEXEC flag on the directory */
729
ret = set_cloexec_flag(dir_fd);
730
if(ret < 0){
731
perror("set_cloexec_flag");
732
TEMP_FAILURE_RETRY(close(dir_fd));
733
exitstatus = EXIT_FAILURE;
734
goto fallback;
735
}
736
#endif /* O_CLOEXEC */
737
738
dir = fdopendir(dir_fd);
739
if(dir == NULL){
740
perror("Could not open plugin dir");
741
TEMP_FAILURE_RETRY(close(dir_fd));
742
exitstatus = EXIT_FAILURE;
743
goto fallback;
526
744
}
527
745
}
528
746
529
747
FD_ZERO(&rfds_all);
530
748
749
/* Read and execute any executable in the plugin directory*/
531
750
while(true){
532
dirst = readdir(dir);
751
do {
752
dirst = readdir(dir);
753
} while(dirst == NULL and errno == EINTR);
533
754
534
// All directory entries have been processed
755
/* All directory entries have been processed */
535
756
if(dirst == NULL){
536
if (errno == EBADF){
757
if(errno == EBADF){
537
758
perror("readdir");
538
759
exitstatus = EXIT_FAILURE;
539
goto end;
760
goto fallback;
540
761
}
541
762
break;
542
763
}
543
764
544
765
d_name_len = strlen(dirst->d_name);
545
766
546
// Ignore dotfiles, backup files and other junk
767
/* Ignore dotfiles, backup files and other junk */
547
768
{
548
769
bool bad_name = false;
549
770
551
772
552
773
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
553
774
".dpkg-old",
775
".dpkg-bak",
554
776
".dpkg-divert", NULL };
555
777
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
556
778
size_t pre_len = strlen(*pre);
564
786
break;
565
787
}
566
788
}
567
568
789
if(bad_name){
569
790
continue;
570
791
}
571
572
792
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
573
793
size_t suf_len = strlen(*suf);
574
794
if((d_name_len >= suf_len)
587
807
continue;
588
808
}
589
809
}
590
810
591
811
char *filename;
592
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
812
if(plugindir == NULL){
813
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
814
dirst->d_name));
815
} else {
816
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
817
plugindir,
818
dirst->d_name));
819
}
593
820
if(ret < 0){
594
821
perror("asprintf");
595
822
continue;
596
823
}
597
824
598
ret = stat(filename, &st);
599
if (ret == -1){
825
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
826
if(ret == -1){
600
827
perror("stat");
601
828
free(filename);
602
829
continue;
603
830
}
604
831
605
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
832
/* Ignore non-executable files */
833
if(not S_ISREG(st.st_mode)
834
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
606
835
if(debug){
607
836
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
608
837
" with bad type or mode\n", filename);
610
839
free(filename);
611
840
continue;
612
841
}
613
plugin *p = getplugin(dirst->d_name, &plugin_list);
842
843
plugin *p = getplugin(dirst->d_name);
614
844
if(p == NULL){
615
845
perror("getplugin");
616
846
free(filename);
626
856
}
627
857
{
628
858
/* Add global arguments to argument list for this plugin */
629
plugin *g = getplugin(NULL, &plugin_list);
859
plugin *g = getplugin(NULL);
630
860
if(g != NULL){
631
861
for(char **a = g->argv + 1; *a != NULL; a++){
632
862
if(not add_argument(p, *a)){
635
865
}
636
866
/* Add global environment variables */
637
867
for(char **e = g->environ; *e != NULL; e++){
638
if(not add_environment(p, *e)){
868
if(not add_environment(p, *e, false)){
639
869
perror("add_environment");
640
870
}
641
871
}
646
876
process, too. */
647
877
if(p->environ[0] != NULL){
648
878
for(char **e = environ; *e != NULL; e++){
649
char *copy = strdup(*e);
650
if(copy == NULL){
651
perror("strdup");
652
continue;
653
}
654
if(not add_environment(p, copy)){
879
if(not add_environment(p, *e, false)){
655
880
perror("add_environment");
656
881
}
657
882
}
658
883
}
659
884
660
int pipefd[2];
661
ret = pipe(pipefd);
662
if (ret == -1){
885
int pipefd[2];
886
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
887
if(ret == -1){
663
888
perror("pipe");
664
889
exitstatus = EXIT_FAILURE;
665
goto end;
890
goto fallback;
666
891
}
892
/* Ask OS to automatic close the pipe on exec */
667
893
ret = set_cloexec_flag(pipefd[0]);
668
894
if(ret < 0){
669
895
perror("set_cloexec_flag");
670
896
exitstatus = EXIT_FAILURE;
671
goto end;
897
goto fallback;
672
898
}
673
899
ret = set_cloexec_flag(pipefd[1]);
674
900
if(ret < 0){
675
901
perror("set_cloexec_flag");
676
902
exitstatus = EXIT_FAILURE;
677
goto end;
903
goto fallback;
678
904
}
679
905
/* Block SIGCHLD until process is safely in process list */
680
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
906
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
907
&sigchld_action.sa_mask,
908
NULL));
681
909
if(ret < 0){
682
910
perror("sigprocmask");
683
911
exitstatus = EXIT_FAILURE;
684
goto end;
912
goto fallback;
685
913
}
686
// Starting a new process to be watched
687
pid_t pid = fork();
914
/* Starting a new process to be watched */
915
pid_t pid;
916
do {
917
pid = fork();
918
} while(pid == -1 and errno == EINTR);
688
919
if(pid == -1){
689
920
perror("fork");
690
921
exitstatus = EXIT_FAILURE;
691
goto end;
922
goto fallback;
692
923
}
693
924
if(pid == 0){
694
925
/* this is the child process */
697
928
perror("sigaction");
698
929
_exit(EXIT_FAILURE);
699
930
}
700
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
931
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
701
932
if(ret < 0){
702
933
perror("sigprocmask");
703
934
_exit(EXIT_FAILURE);
704
935
}
705
936
706
937
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
707
938
if(ret == -1){
708
939
perror("dup2");
727
958
}
728
959
/* no return */
729
960
}
730
/* parent process */
961
/* Parent process */
962
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
963
pipe */
731
964
free(filename);
732
close(pipefd[1]); /* close unused write end of pipe */
733
process *new_process = malloc(sizeof(process));
734
if (new_process == NULL){
735
perror("malloc");
736
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
965
plugin *new_plugin = getplugin(dirst->d_name);
966
if(new_plugin == NULL){
967
perror("getplugin");
968
ret = (int)(TEMP_FAILURE_RETRY
969
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
970
NULL)));
737
971
if(ret < 0){
738
perror("sigprocmask");
972
perror("sigprocmask");
739
973
}
740
974
exitstatus = EXIT_FAILURE;
741
goto end;
975
goto fallback;
742
976
}
743
977
744
*new_process = (struct process){ .pid = pid,
745
.fd = pipefd[0],
746
.next = process_list };
747
// List handling
748
process_list = new_process;
978
new_plugin->pid = pid;
979
new_plugin->fd = pipefd[0];
980
749
981
/* Unblock SIGCHLD so signal handler can be run if this process
750
982
has already completed */
751
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
983
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
984
&sigchld_action.sa_mask,
985
NULL));
752
986
if(ret < 0){
753
987
perror("sigprocmask");
754
988
exitstatus = EXIT_FAILURE;
755
goto end;
756
}
757
758
FD_SET(new_process->fd, &rfds_all);
759
760
if (maxfd < new_process->fd){
761
maxfd = new_process->fd;
762
}
763
764
}
765
766
/* Free the plugin list */
767
for(plugin *next; plugin_list != NULL; plugin_list = next){
768
next = plugin_list->next;
769
free(plugin_list->argv);
770
if(plugin_list->environ[0] != NULL){
771
for(char **e = plugin_list->environ; *e != NULL; e++){
772
free(*e);
773
}
774
}
775
free(plugin_list);
776
}
777
778
closedir(dir);
989
goto fallback;
990
}
991
992
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
993
-Wconversion */
994
995
if(maxfd < new_plugin->fd){
996
maxfd = new_plugin->fd;
997
}
998
}
999
1000
TEMP_FAILURE_RETRY(closedir(dir));
779
1001
dir = NULL;
780
781
if (process_list == NULL){
782
fprintf(stderr, "No plugin processes started. Incorrect plugin"
783
" directory?\n");
784
process_list = NULL;
1002
free_plugin(getplugin(NULL));
1003
1004
for(plugin *p = plugin_list; p != NULL; p = p->next){
1005
if(p->pid != 0){
1006
break;
1007
}
1008
if(p->next == NULL){
1009
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1010
" directory?\n");
1011
free_plugin_list();
1012
}
785
1013
}
786
while(process_list){
1014
1015
/* Main loop while running plugins exist */
1016
while(plugin_list){
787
1017
fd_set rfds = rfds_all;
788
1018
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
789
if (select_ret == -1){
1019
if(select_ret == -1 and errno != EINTR){
790
1020
perror("select");
791
1021
exitstatus = EXIT_FAILURE;
792
goto end;
1022
goto fallback;
793
1023
}
794
1024
/* OK, now either a process completed, or something can be read
795
1025
from one of them */
796
for(process *proc = process_list; proc ; proc = proc->next){
1026
for(plugin *proc = plugin_list; proc != NULL;){
797
1027
/* Is this process completely done? */
798
if(proc->eof and proc->completed){
1028
if(proc->completed and proc->eof){
799
1029
/* Only accept the plugin output if it exited cleanly */
800
1030
if(not WIFEXITED(proc->status)
801
1031
or WEXITSTATUS(proc->status) != 0){
802
1032
/* Bad exit by plugin */
1033
803
1034
if(debug){
804
1035
if(WIFEXITED(proc->status)){
805
fprintf(stderr, "Plugin %u exited with status %d\n",
806
(unsigned int) (proc->pid),
1036
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1037
" status %d\n", proc->name,
1038
(intmax_t) (proc->pid),
807
1039
WEXITSTATUS(proc->status));
808
} else if(WIFSIGNALED(proc->status)) {
809
fprintf(stderr, "Plugin %u killed by signal %d\n",
810
(unsigned int) (proc->pid),
811
WTERMSIG(proc->status));
1040
} else if(WIFSIGNALED(proc->status)){
1041
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1042
" signal %d: %s\n", proc->name,
1043
(intmax_t) (proc->pid),
1044
WTERMSIG(proc->status),
1045
strsignal(WTERMSIG(proc->status)));
812
1046
} else if(WCOREDUMP(proc->status)){
813
fprintf(stderr, "Plugin %d dumped core\n",
814
(unsigned int) (proc->pid));
1047
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1048
" core\n", proc->name, (intmax_t) (proc->pid));
815
1049
}
816
1050
}
1051
817
1052
/* Remove the plugin */
818
FD_CLR(proc->fd, &rfds_all);
1053
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1054
-Wconversion */
1055
819
1056
/* Block signal while modifying process_list */
820
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1057
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1058
(SIG_BLOCK,
1059
&sigchld_action.sa_mask,
1060
NULL));
821
1061
if(ret < 0){
822
1062
perror("sigprocmask");
823
1063
exitstatus = EXIT_FAILURE;
824
goto end;
825
}
826
/* Delete this process entry from the list */
827
if(process_list == proc){
828
/* First one - simple */
829
process_list = proc->next;
830
} else {
831
/* Second one or later */
832
for(process *p = process_list; p != NULL; p = p->next){
833
if(p->next == proc){
834
p->next = proc->next;
835
break;
836
}
837
}
838
}
1064
goto fallback;
1065
}
1066
1067
plugin *next_plugin = proc->next;
1068
free_plugin(proc);
1069
proc = next_plugin;
1070
839
1071
/* We are done modifying process list, so unblock signal */
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
841
NULL);
1072
ret = (int)(TEMP_FAILURE_RETRY
1073
(sigprocmask(SIG_UNBLOCK,
1074
&sigchld_action.sa_mask, NULL)));
842
1075
if(ret < 0){
843
1076
perror("sigprocmask");
844
}
845
free(proc->buffer);
846
free(proc);
847
/* We deleted this process from the list, so we can't go
848
proc->next. Therefore, start over from the beginning of
849
the process list */
850
break;
1077
exitstatus = EXIT_FAILURE;
1078
goto fallback;
1079
}
1080
1081
if(plugin_list == NULL){
1082
break;
1083
}
1084
1085
continue;
851
1086
}
1087
852
1088
/* This process exited nicely, so print its buffer */
853
854
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1089
1090
bool bret = print_out_password(proc->buffer,
1091
proc->buffer_length);
855
1092
if(not bret){
856
1093
perror("print_out_password");
857
1094
exitstatus = EXIT_FAILURE;
858
1095
}
859
goto end;
1096
goto fallback;
860
1097
}
1098
861
1099
/* This process has not completed. Does it have any output? */
862
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1100
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1101
warning from
1102
-Wconversion */
863
1103
/* This process had nothing to say at this time */
1104
proc = proc->next;
864
1105
continue;
865
1106
}
866
1107
/* Before reading, make the process' data buffer large enough */
867
1108
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
868
1109
proc->buffer = realloc(proc->buffer, proc->buffer_size
869
1110
+ (size_t) BUFFER_SIZE);
870
if (proc->buffer == NULL){
1111
if(proc->buffer == NULL){
871
1112
perror("malloc");
872
1113
exitstatus = EXIT_FAILURE;
873
goto end;
1114
goto fallback;
874
1115
}
875
1116
proc->buffer_size += BUFFER_SIZE;
876
1117
}
877
1118
/* Read from the process */
878
ret = read(proc->fd, proc->buffer + proc->buffer_length,
879
BUFFER_SIZE);
880
if(ret < 0){
1119
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1120
proc->buffer
1121
+ proc->buffer_length,
1122
BUFFER_SIZE));
1123
if(sret < 0){
881
1124
/* Read error from this process; ignore the error */
1125
proc = proc->next;
882
1126
continue;
883
1127
}
884
if(ret == 0){
1128
if(sret == 0){
885
1129
/* got EOF */
886
1130
proc->eof = true;
887
1131
} else {
888
proc->buffer_length += (size_t) ret;
1132
proc->buffer_length += (size_t) sret;
889
1133
}
890
1134
}
891
1135
}
892
893
894
end:
895
896
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
897
/* Fallback if all plugins failed, none are found or an error occured */
1136
1137
1138
fallback:
1139
1140
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1141
/* Fallback if all plugins failed, none are found or an error
1142
occured */
898
1143
bool bret;
899
1144
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
900
1145
char *passwordbuffer = getpass("Password: ");
901
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1146
size_t len = strlen(passwordbuffer);
1147
/* Strip trailing newline */
1148
if(len > 0 and passwordbuffer[len-1] == '\n'){
1149
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1150
len--;
1151
}
1152
bret = print_out_password(passwordbuffer, len);
902
1153
if(not bret){
903
1154
perror("print_out_password");
904
1155
exitstatus = EXIT_FAILURE;
905
goto end;
906
1156
}
907
1157
}
908
1158
909
1159
/* Restore old signal handler */
910
sigaction(SIGCHLD, &old_sigchld_action, NULL);
911
912
free(custom_argv);
913
914
/* Free the plugin list */
915
for(plugin *next; plugin_list != NULL; plugin_list = next){
916
next = plugin_list->next;
917
free(plugin_list->argv);
918
if(plugin_list->environ[0] != NULL){
919
for(char **e = plugin_list->environ; *e != NULL; e++){
920
free(*e);
921
}
1160
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1161
if(ret == -1){
1162
perror("sigaction");
1163
exitstatus = EXIT_FAILURE;
1164
}
1165
1166
if(custom_argv != NULL){
1167
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1168
free(*arg);
922
1169
}
923
free(plugin_list->environ);
924
free(plugin_list);
1170
free(custom_argv);
925
1171
}
926
1172
927
1173
if(dir != NULL){
928
1174
closedir(dir);
929
1175
}
930
1176
931
/* Free the process list and kill the processes */
932
for(process *next; process_list != NULL; process_list = next){
933
next = process_list->next;
934
close(process_list->fd);
935
ret = kill(process_list->pid, SIGTERM);
936
if(ret == -1 and errno != ESRCH){
937
/* set-uid proccesses migth not get closed */
938
perror("kill");
1177
/* Kill the processes */
1178
for(plugin *p = plugin_list; p != NULL; p = p->next){
1179
if(p->pid != 0){
1180
close(p->fd);
1181
ret = kill(p->pid, SIGTERM);
1182
if(ret == -1 and errno != ESRCH){
1183
/* Set-uid proccesses might not get closed */
1184
perror("kill");
1185
}
939
1186
}
940
free(process_list->buffer);
941
free(process_list);
942
1187
}
943
1188
944
1189
/* Wait for any remaining child processes to terminate */
945
do{
1190
do {
946
1191
ret = wait(NULL);
947
1192
} while(ret >= 0);
948
1193
if(errno != ECHILD){
949
1194
perror("wait");
950
1195
}
951
1196
1197
free_plugin_list();
1198
1199
free(plugindir);
1200
free(argfile);
1201
952
1202
return exitstatus;
953
1203
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0