To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 104
- compare with another revision
- download diff
- download tarball
- view history from revision 104
- Committer: Teddy Hogeborn
- Date: 2008-08-25 03:53:42 UTC
- Revision ID: teddy@fukt.bsnet.se-20080825035342-wheobopjfhf0hive
* Makefile (maintainer-clean): Also remove "confdir".
(run-client): Also create a key.
(run-server): Also create a local config including a client.
(keydir/secring.gpg, keydir/pubring.gpg, keydir/seckey.txt
keydir/pubkey.txt): New targets used by "run-client".
(confdir/mandos.conf, confdir/clients.conf): New targets used by
"run-server".
* mandos-keygen (KEYLENGTH): Changed default to "2048".
* mandos-keygen.xml (OPTIONS): Changed default value for "--length".
(run-client): Also create a key.
(run-server): Also create a local config including a client.
(keydir/secring.gpg, keydir/pubring.gpg, keydir/seckey.txt
keydir/pubkey.txt): New targets used by "run-client".
(confdir/mandos.conf, confdir/clients.conf): New targets used by
"run-server".
* mandos-keygen (KEYLENGTH): Changed default to "2048".
* mandos-keygen.xml (OPTIONS): Changed default value for "--length".
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
8
7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
23
22
*/
24
23
25
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
25
asprintf() */
27
26
#include <stddef.h> /* size_t, NULL */
28
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
28
EXIT_SUCCESS, realloc() */
30
29
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
33
stat, waitpid(), WIFEXITED(),
35
34
WEXITSTATUS(), wait(), pid_t,
36
35
uid_t, gid_t, getuid(), getgid(),
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
40
WEXITSTATUS() */
43
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
42
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
44
readdir(), closedir(), dirfd() */
47
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
46
fcntl(), setuid(), setgid(),
49
47
F_GETFD, F_SETFD, FD_CLOEXEC,
50
48
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
49
dup2, STDOUT_FILENO, _exit(),
52
50
execv(), write(), read(),
53
51
close() */
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
53
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
58
55
#include <errno.h> /* errno */
59
56
#include <argp.h> /* struct argp_option, struct
60
57
argp_state, struct argp,
64
61
#include <signal.h> /* struct sigaction, sigemptyset(),
65
62
sigaddset(), sigaction(),
66
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
64
SIG_UNBLOCK, kill() */
69
65
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
72
66
73
67
#define BUFFER_SIZE 256
74
75
#define PDIR "/lib/mandos/plugins.d"
76
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
77
78
const char *argp_program_version = "plugin-runner " VERSION;
68
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
70
const char *argp_program_version = "plugin-runner 1.0";
79
71
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
80
72
73
struct process;
74
75
typedef struct process{
76
pid_t pid;
77
int fd;
78
char *buffer;
79
size_t buffer_size;
80
size_t buffer_length;
81
bool eof;
82
volatile bool completed;
83
volatile int status;
84
struct process *next;
85
} process;
86
81
87
typedef struct plugin{
82
88
char *name; /* can be NULL or any plugin name */
83
89
char **argv;
85
91
char **environ;
86
92
int envc;
87
93
bool disabled;
88
89
/* Variables used for running processes*/
90
pid_t pid;
91
int fd;
92
char *buffer;
93
size_t buffer_size;
94
size_t buffer_length;
95
bool eof;
96
volatile sig_atomic_t completed;
97
int status;
98
94
struct plugin *next;
99
95
} plugin;
100
96
101
static plugin *plugin_list = NULL;
102
103
/* Gets an existing plugin based on name,
104
or if none is found, creates a new one */
105
static plugin *getplugin(char *name){
106
/* Check for existing plugin with that name */
107
for(plugin *p = plugin_list; p != NULL; p = p->next){
108
if((p->name == name)
109
or (p->name and name and (strcmp(p->name, name) == 0))){
97
static plugin *getplugin(char *name, plugin **plugin_list){
98
for (plugin *p = *plugin_list; p != NULL; p = p->next){
99
if ((p->name == name)
100
or (p->name and name and (strcmp(p->name, name) == 0))){
110
101
return p;
111
102
}
112
103
}
113
104
/* Create a new plugin */
114
plugin *new_plugin = NULL;
115
do {
116
new_plugin = malloc(sizeof(plugin));
117
} while(new_plugin == NULL and errno == EINTR);
118
if(new_plugin == NULL){
105
plugin *new_plugin = malloc(sizeof(plugin));
106
if (new_plugin == NULL){
119
107
return NULL;
120
108
}
121
109
char *copy_name = NULL;
122
110
if(name != NULL){
123
do {
124
copy_name = strdup(name);
125
} while(copy_name == NULL and errno == EINTR);
111
copy_name = strdup(name);
126
112
if(copy_name == NULL){
127
int e = errno;
128
free(new_plugin);
129
errno = e;
130
113
return NULL;
131
114
}
132
115
}
133
116
134
*new_plugin = (plugin){ .name = copy_name,
135
.argc = 1,
136
.disabled = false,
137
.next = plugin_list };
117
*new_plugin = (plugin) { .name = copy_name,
118
.argc = 1,
119
.envc = 0,
120
.disabled = false,
121
.next = *plugin_list };
138
122
139
do {
140
new_plugin->argv = malloc(sizeof(char *) * 2);
141
} while(new_plugin->argv == NULL and errno == EINTR);
142
if(new_plugin->argv == NULL){
143
int e = errno;
123
new_plugin->argv = malloc(sizeof(char *) * 2);
124
if (new_plugin->argv == NULL){
144
125
free(copy_name);
145
126
free(new_plugin);
146
errno = e;
147
127
return NULL;
148
128
}
149
129
new_plugin->argv[0] = copy_name;
150
130
new_plugin->argv[1] = NULL;
151
152
do {
153
new_plugin->environ = malloc(sizeof(char *));
154
} while(new_plugin->environ == NULL and errno == EINTR);
131
132
new_plugin->environ = malloc(sizeof(char *));
155
133
if(new_plugin->environ == NULL){
156
int e = errno;
157
134
free(copy_name);
158
135
free(new_plugin->argv);
159
136
free(new_plugin);
160
errno = e;
161
137
return NULL;
162
138
}
163
139
new_plugin->environ[0] = NULL;
164
165
140
/* Append the new plugin to the list */
166
plugin_list = new_plugin;
141
*plugin_list = new_plugin;
167
142
return new_plugin;
168
143
}
169
144
171
146
static bool add_to_char_array(const char *new, char ***array,
172
147
int *len){
173
148
/* Resize the pointed-to array to hold one more pointer */
174
do {
175
*array = realloc(*array, sizeof(char *)
176
* (size_t) ((*len) + 2));
177
} while(*array == NULL and errno == EINTR);
149
*array = realloc(*array, sizeof(char *)
150
* (size_t) ((*len) + 2));
178
151
/* Malloc check */
179
152
if(*array == NULL){
180
153
return false;
181
154
}
182
155
/* Make a copy of the new string */
183
char *copy;
184
do {
185
copy = strdup(new);
186
} while(copy == NULL and errno == EINTR);
156
char *copy = strdup(new);
187
157
if(copy == NULL){
188
158
return false;
189
159
}
204
174
}
205
175
206
176
/* Add to a plugin's environment */
207
static bool add_environment(plugin *p, const char *def, bool replace){
177
static bool add_environment(plugin *p, const char *def){
208
178
if(p == NULL){
209
179
return false;
210
180
}
211
/* namelen = length of name of environment variable */
212
size_t namelen = (size_t)(strchrnul(def, '=') - def);
213
/* Search for this environment variable */
214
for(char **e = p->environ; *e != NULL; e++){
215
if(strncmp(*e, def, namelen + 1) == 0){
216
/* It already exists */
217
if(replace){
218
char *new;
219
do {
220
new = realloc(*e, strlen(def) + 1);
221
} while(new == NULL and errno == EINTR);
222
if(new == NULL){
223
return false;
224
}
225
*e = new;
226
strcpy(*e, def);
227
}
228
return true;
229
}
230
}
231
181
return add_to_char_array(def, &(p->environ), &(p->envc));
232
182
}
233
183
184
234
185
/*
235
186
* Based on the example in the GNU LibC manual chapter 13.13 "File
236
187
* Descriptor Flags".
237
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
188
* *Note File Descriptor Flags:(libc)Descriptor Flags.
238
189
*/
239
static int set_cloexec_flag(int fd){
240
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
190
static int set_cloexec_flag(int fd)
191
{
192
int ret = fcntl(fd, F_GETFD, 0);
241
193
/* If reading the flags failed, return error indication now. */
242
194
if(ret < 0){
243
195
return ret;
244
196
}
245
197
/* Store modified flag word in the descriptor. */
246
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
247
ret | FD_CLOEXEC));
198
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
248
199
}
249
200
201
process *process_list = NULL;
250
202
251
203
/* Mark processes as completed when they exit, and save their exit
252
204
status. */
253
static void handle_sigchld(__attribute__((unused)) int sig){
254
int old_errno = errno;
205
void handle_sigchld(__attribute__((unused)) int sig){
255
206
while(true){
256
plugin *proc = plugin_list;
207
process *proc = process_list;
257
208
int status;
258
209
pid_t pid = waitpid(-1, &status, WNOHANG);
259
210
if(pid == 0){
261
212
break;
262
213
}
263
214
if(pid == -1){
264
if(errno == ECHILD){
265
/* No child processes */
266
break;
215
if (errno != ECHILD){
216
perror("waitpid");
267
217
}
268
perror("waitpid");
218
/* No child processes */
219
break;
269
220
}
270
221
271
222
/* A child exited, find it in process_list */
272
223
while(proc != NULL and proc->pid != pid){
273
224
proc = proc->next;
277
228
continue;
278
229
}
279
230
proc->status = status;
280
proc->completed = 1;
231
proc->completed = true;
281
232
}
282
errno = old_errno;
283
233
}
284
234
285
/* Prints out a password to stdout */
286
static bool print_out_password(const char *buffer, size_t length){
235
bool print_out_password(const char *buffer, size_t length){
287
236
ssize_t ret;
237
if(length>0 and buffer[length-1] == '\n'){
238
length--;
239
}
288
240
for(size_t written = 0; written < length; written += (size_t)ret){
289
241
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
290
242
length - written));
295
247
return true;
296
248
}
297
249
298
/* Removes and free a plugin from the plugin list */
299
static void free_plugin(plugin *plugin_node){
300
301
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
302
free(*arg);
303
}
304
free(plugin_node->argv);
305
for(char **env = plugin_node->environ; *env != NULL; env++){
306
free(*env);
307
}
308
free(plugin_node->environ);
309
free(plugin_node->buffer);
310
311
/* Removes the plugin from the singly-linked list */
312
if(plugin_node == plugin_list){
313
/* First one - simple */
314
plugin_list = plugin_list->next;
315
} else {
316
/* Second one or later */
317
for(plugin *p = plugin_list; p != NULL; p = p->next){
318
if(p->next == plugin_node){
319
p->next = plugin_node->next;
320
break;
321
}
250
char **add_to_argv(char **argv, int *argc, char *arg){
251
if (argv == NULL){
252
*argc = 1;
253
argv = malloc(sizeof(char*) * 2);
254
if(argv == NULL){
255
return NULL;
322
256
}
323
}
324
325
free(plugin_node);
257
argv[0] = NULL; /* Will be set to argv[0] in main before
258
parsing */
259
argv[1] = NULL;
260
}
261
*argc += 1;
262
argv = realloc(argv, sizeof(char *)
263
* ((unsigned int) *argc + 1));
264
if(argv == NULL){
265
return NULL;
266
}
267
argv[*argc-1] = arg;
268
argv[*argc] = NULL;
269
return argv;
326
270
}
327
271
328
static void free_plugin_list(void){
329
while(plugin_list != NULL){
330
free_plugin(plugin_list);
272
static void free_plugin_list(plugin *plugin_list){
273
for(plugin *next; plugin_list != NULL; plugin_list = next){
274
next = plugin_list->next;
275
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
276
free(*arg);
277
}
278
free(plugin_list->argv);
279
for(char **env = plugin_list->environ; *env != NULL; env++){
280
free(*env);
281
}
282
free(plugin_list->environ);
283
free(plugin_list);
331
284
}
332
285
}
333
286
334
287
int main(int argc, char *argv[]){
335
char *plugindir = NULL;
336
char *argfile = NULL;
288
const char *plugindir = "/lib/mandos/plugins.d";
289
const char *argfile = ARGFILE;
337
290
FILE *conffp;
338
291
size_t d_name_len;
339
292
DIR *dir = NULL;
341
294
struct stat st;
342
295
fd_set rfds_all;
343
296
int ret, maxfd = 0;
344
ssize_t sret;
345
297
uid_t uid = 65534;
346
298
gid_t gid = 65534;
347
299
bool debug = false;
372
324
{ .name = "global-options", .key = 'g',
373
325
.arg = "OPTION[,OPTION[,...]]",
374
326
.doc = "Options passed to all plugins" },
375
{ .name = "global-env", .key = 'G',
327
{ .name = "global-envs", .key = 'e',
376
328
.arg = "VAR=value",
377
329
.doc = "Environment variable passed to all plugins" },
378
330
{ .name = "options-for", .key = 'o',
379
331
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
380
332
.doc = "Options passed only to specified plugin" },
381
{ .name = "env-for", .key = 'E',
333
{ .name = "envs-for", .key = 'f',
382
334
.arg = "PLUGIN:ENV=value",
383
335
.doc = "Environment variable passed to specified plugin" },
384
336
{ .name = "disable", .key = 'd',
385
337
.arg = "PLUGIN",
386
338
.doc = "Disable a specific plugin", .group = 1 },
387
{ .name = "enable", .key = 'e',
388
.arg = "PLUGIN",
389
.doc = "Enable a specific plugin", .group = 1 },
390
339
{ .name = "plugin-dir", .key = 128,
391
340
.arg = "DIRECTORY",
392
341
.doc = "Specify a different plugin directory", .group = 2 },
393
{ .name = "config-file", .key = 129,
394
.arg = "FILE",
395
.doc = "Specify a different configuration file", .group = 2 },
396
{ .name = "userid", .key = 130,
397
.arg = "ID", .flags = 0,
398
.doc = "User ID the plugins will run as", .group = 3 },
399
{ .name = "groupid", .key = 131,
400
.arg = "ID", .flags = 0,
401
.doc = "Group ID the plugins will run as", .group = 3 },
402
{ .name = "debug", .key = 132,
403
.doc = "Debug mode", .group = 4 },
404
/*
405
* These reproduce what we would get without ARGP_NO_HELP
406
*/
407
{ .name = "help", .key = '?',
408
.doc = "Give this help list", .group = -1 },
409
{ .name = "usage", .key = -3,
410
.doc = "Give a short usage message", .group = -1 },
411
{ .name = "version", .key = 'V',
412
.doc = "Print program version", .group = -1 },
342
{ .name = "userid", .key = 129,
343
.arg = "ID", .flags = 0,
344
.doc = "User ID the plugins will run as", .group = 2 },
345
{ .name = "groupid", .key = 130,
346
.arg = "ID", .flags = 0,
347
.doc = "Group ID the plugins will run as", .group = 2 },
348
{ .name = "debug", .key = 131,
349
.doc = "Debug mode", .group = 3 },
413
350
{ .name = NULL }
414
351
};
415
352
416
error_t parse_opt(int key, char *arg, struct argp_state *state){
417
errno = 0;
418
switch(key){
419
char *tmp;
420
intmax_t tmpmax;
421
case 'g': /* --global-options */
422
{
423
char *plugin_option;
424
while((plugin_option = strsep(&arg, ",")) != NULL){
425
if(not add_argument(getplugin(NULL), plugin_option)){
426
break;
427
}
428
}
429
}
430
break;
431
case 'G': /* --global-env */
432
add_environment(getplugin(NULL), arg, true);
433
break;
434
case 'o': /* --options-for */
435
{
436
char *option_list = strchr(arg, ':');
437
if(option_list == NULL){
438
argp_error(state, "No colon in \"%s\"", arg);
439
errno = EINVAL;
440
break;
441
}
442
*option_list = '\0';
443
option_list++;
444
if(arg[0] == '\0'){
445
argp_error(state, "Empty plugin name");
446
errno = EINVAL;
447
break;
448
}
449
char *option;
450
while((option = strsep(&option_list, ",")) != NULL){
451
if(not add_argument(getplugin(arg), option)){
452
break;
453
}
454
}
455
}
456
break;
457
case 'E': /* --env-for */
353
error_t parse_opt (int key, char *arg, struct argp_state *state) {
354
/* Get the INPUT argument from `argp_parse', which we know is a
355
pointer to our plugin list pointer. */
356
plugin **plugins = state->input;
357
switch (key) {
358
case 'g':
359
if (arg != NULL){
360
char *p;
361
while((p = strsep(&arg, ",")) != NULL){
362
if(p[0] == '\0'){
363
continue;
364
}
365
if(not add_argument(getplugin(NULL, plugins), p)){
366
perror("add_argument");
367
return ARGP_ERR_UNKNOWN;
368
}
369
}
370
}
371
break;
372
case 'e':
373
if(arg == NULL){
374
break;
375
}
376
{
377
char *envdef = strdup(arg);
378
if(envdef == NULL){
379
break;
380
}
381
if(not add_environment(getplugin(NULL, plugins), envdef)){
382
perror("add_environment");
383
}
384
}
385
break;
386
case 'o':
387
if (arg != NULL){
388
char *p_name = strsep(&arg, ":");
389
if(p_name[0] == '\0'){
390
break;
391
}
392
char *opt = strsep(&arg, ":");
393
if(opt[0] == '\0'){
394
break;
395
}
396
if(opt != NULL){
397
char *p;
398
while((p = strsep(&opt, ",")) != NULL){
399
if(p[0] == '\0'){
400
continue;
401
}
402
if(not add_argument(getplugin(p_name, plugins), p)){
403
perror("add_argument");
404
return ARGP_ERR_UNKNOWN;
405
}
406
}
407
}
408
}
409
break;
410
case 'f':
411
if(arg == NULL){
412
break;
413
}
458
414
{
459
415
char *envdef = strchr(arg, ':');
460
416
if(envdef == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*envdef = '\0';
417
break;
418
}
419
char *p_name = strndup(arg, (size_t) (envdef-arg));
420
if(p_name == NULL){
421
break;
422
}
466
423
envdef++;
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
add_environment(getplugin(arg), envdef, true);
473
}
474
break;
475
case 'd': /* --disable */
476
{
477
plugin *p = getplugin(arg);
478
if(p != NULL){
479
p->disabled = true;
480
}
481
}
482
break;
483
case 'e': /* --enable */
484
{
485
plugin *p = getplugin(arg);
486
if(p != NULL){
487
p->disabled = false;
488
}
489
}
490
break;
491
case 128: /* --plugin-dir */
492
free(plugindir);
493
plugindir = strdup(arg);
494
break;
495
case 129: /* --config-file */
496
/* This is already done by parse_opt_config_file() */
497
break;
498
case 130: /* --userid */
499
tmpmax = strtoimax(arg, &tmp, 10);
500
if(errno != 0 or tmp == arg or *tmp != '\0'
501
or tmpmax != (uid_t)tmpmax){
502
argp_error(state, "Bad user ID number: \"%s\", using %"
503
PRIdMAX, arg, (intmax_t)uid);
504
break;
505
}
506
uid = (uid_t)tmpmax;
507
break;
508
case 131: /* --groupid */
509
tmpmax = strtoimax(arg, &tmp, 10);
510
if(errno != 0 or tmp == arg or *tmp != '\0'
511
or tmpmax != (gid_t)tmpmax){
512
argp_error(state, "Bad group ID number: \"%s\", using %"
513
PRIdMAX, arg, (intmax_t)gid);
514
break;
515
}
516
gid = (gid_t)tmpmax;
517
break;
518
case 132: /* --debug */
424
if(not add_environment(getplugin(p_name, plugins), envdef)){
425
perror("add_environment");
426
}
427
}
428
break;
429
case 'd':
430
if (arg != NULL){
431
plugin *p = getplugin(arg, plugins);
432
if(p == NULL){
433
return ARGP_ERR_UNKNOWN;
434
}
435
p->disabled = true;
436
}
437
break;
438
case 128:
439
plugindir = arg;
440
break;
441
case 129:
442
uid = (uid_t)strtol(arg, NULL, 10);
443
break;
444
case 130:
445
gid = (gid_t)strtol(arg, NULL, 10);
446
break;
447
case 131:
519
448
debug = true;
520
449
break;
521
/*
522
* These reproduce what we would get without ARGP_NO_HELP
523
*/
524
case '?': /* --help */
525
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
526
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
527
case -3: /* --usage */
528
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
529
argp_state_help(state, state->out_stream,
530
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
531
case 'V': /* --version */
532
fprintf(state->out_stream, "%s\n", argp_program_version);
533
exit(EXIT_SUCCESS);
534
break;
535
/*
536
* When adding more options before this line, remember to also add a
537
* "case" to the "parse_opt_config_file" function below.
538
*/
539
case ARGP_KEY_ARG:
540
/* Cryptsetup always passes an argument, which is an empty
541
string if "none" was specified in /etc/crypttab. So if
542
argument was empty, we ignore it silently. */
543
if(arg[0] == '\0'){
544
break;
545
}
546
default:
547
return ARGP_ERR_UNKNOWN;
548
}
549
return errno; /* Set to 0 at start */
550
}
551
552
/* This option parser is the same as parse_opt() above, except it
553
ignores everything but the --config-file option. */
554
error_t parse_opt_config_file(int key, char *arg,
555
__attribute__((unused))
556
struct argp_state *state){
557
errno = 0;
558
switch(key){
559
case 'g': /* --global-options */
560
case 'G': /* --global-env */
561
case 'o': /* --options-for */
562
case 'E': /* --env-for */
563
case 'd': /* --disable */
564
case 'e': /* --enable */
565
case 128: /* --plugin-dir */
566
break;
567
case 129: /* --config-file */
568
free(argfile);
569
argfile = strdup(arg);
570
break;
571
case 130: /* --userid */
572
case 131: /* --groupid */
573
case 132: /* --debug */
574
case '?': /* --help */
575
case -3: /* --usage */
576
case 'V': /* --version */
577
case ARGP_KEY_ARG:
578
break;
579
default:
580
return ARGP_ERR_UNKNOWN;
581
}
582
return errno;
583
}
584
585
struct argp argp = { .options = options,
586
.parser = parse_opt_config_file,
587
.args_doc = "",
450
case ARGP_KEY_ARG:
451
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
452
break;
453
case ARGP_KEY_END:
454
break;
455
default:
456
return ARGP_ERR_UNKNOWN;
457
}
458
return 0;
459
}
460
461
plugin *plugin_list = NULL;
462
463
struct argp argp = { .options = options, .parser = parse_opt,
464
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
588
465
.doc = "Mandos plugin runner -- Run plugins" };
589
466
590
/* Parse using parse_opt_config_file() in order to get the custom
591
config file location, if any. */
592
ret = argp_parse(&argp, argc, argv,
593
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
594
NULL, NULL);
595
switch(ret){
596
case 0:
597
break;
598
case ENOMEM:
599
default:
600
errno = ret;
601
perror("argp_parse");
602
exitstatus = EX_OSERR;
603
goto fallback;
604
case EINVAL:
605
exitstatus = EX_USAGE;
606
goto fallback;
607
}
608
609
/* Reset to the normal argument parser */
610
argp.parser = parse_opt;
611
612
/* Open the configfile if available */
613
if(argfile == NULL){
614
conffp = fopen(AFILE, "r");
615
} else {
616
conffp = fopen(argfile, "r");
617
}
467
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
468
if (ret == ARGP_ERR_UNKNOWN){
469
fprintf(stderr, "Unknown error while parsing arguments\n");
470
exitstatus = EXIT_FAILURE;
471
goto fallback;
472
}
473
474
conffp = fopen(argfile, "r");
618
475
if(conffp != NULL){
619
476
char *org_line = NULL;
620
477
char *p, *arg, *new_arg, *line;
621
478
size_t size = 0;
479
ssize_t sret;
622
480
const char whitespace_delims[] = " \r\t\f\v\n";
623
481
const char comment_delim[] = "#";
624
625
custom_argc = 1;
626
custom_argv = malloc(sizeof(char*) * 2);
627
if(custom_argv == NULL){
628
perror("malloc");
629
exitstatus = EXIT_FAILURE;
630
goto fallback;
631
}
632
custom_argv[0] = argv[0];
633
custom_argv[1] = NULL;
634
635
/* for each line in the config file, strip whitespace and ignore
636
commented text */
482
637
483
while(true){
638
484
sret = getline(&org_line, &size, conffp);
639
485
if(sret == -1){
640
486
break;
641
487
}
642
488
643
489
line = org_line;
644
490
arg = strsep(&line, comment_delim);
645
491
while((p = strsep(&arg, whitespace_delims)) != NULL){
647
493
continue;
648
494
}
649
495
new_arg = strdup(p);
650
if(new_arg == NULL){
651
perror("strdup");
652
exitstatus = EXIT_FAILURE;
653
free(org_line);
654
goto fallback;
655
}
656
657
custom_argc += 1;
658
custom_argv = realloc(custom_argv, sizeof(char *)
659
* ((unsigned int) custom_argc + 1));
660
if(custom_argv == NULL){
661
perror("realloc");
662
exitstatus = EXIT_FAILURE;
663
free(org_line);
664
goto fallback;
665
}
666
custom_argv[custom_argc-1] = new_arg;
667
custom_argv[custom_argc] = NULL;
496
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
497
if (custom_argv == NULL){
498
perror("add_to_argv");
499
exitstatus = EXIT_FAILURE;
500
goto fallback;
501
}
668
502
}
669
503
}
670
do {
671
ret = fclose(conffp);
672
} while(ret == EOF and errno == EINTR);
673
if(ret == EOF){
674
perror("fclose");
675
exitstatus = EXIT_FAILURE;
676
goto fallback;
677
}
678
504
free(org_line);
679
} else {
505
} else{
680
506
/* Check for harmful errors and go to fallback. Other errors might
681
507
not affect opening plugins */
682
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
508
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
683
509
perror("fopen");
684
510
exitstatus = EXIT_FAILURE;
685
511
goto fallback;
686
512
}
687
513
}
688
/* If there were any arguments from the configuration file, pass
689
them to parser as command line arguments */
514
690
515
if(custom_argv != NULL){
691
ret = argp_parse(&argp, custom_argc, custom_argv,
692
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
693
NULL, NULL);
694
switch(ret){
695
case 0:
696
break;
697
case ENOMEM:
698
default:
699
errno = ret;
700
perror("argp_parse");
701
exitstatus = EX_OSERR;
702
goto fallback;
703
case EINVAL:
704
exitstatus = EX_CONFIG;
516
custom_argv[0] = argv[0];
517
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0,
518
&plugin_list);
519
if (ret == ARGP_ERR_UNKNOWN){
520
fprintf(stderr, "Unknown error while parsing arguments\n");
521
exitstatus = EXIT_FAILURE;
705
522
goto fallback;
706
523
}
707
524
}
708
525
709
/* Parse actual command line arguments, to let them override the
710
config file */
711
ret = argp_parse(&argp, argc, argv,
712
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
713
NULL, NULL);
714
switch(ret){
715
case 0:
716
break;
717
case ENOMEM:
718
default:
719
errno = ret;
720
perror("argp_parse");
721
exitstatus = EX_OSERR;
722
goto fallback;
723
case EINVAL:
724
exitstatus = EX_USAGE;
725
goto fallback;
726
}
727
728
526
if(debug){
729
527
for(plugin *p = plugin_list; p != NULL; p=p->next){
730
528
fprintf(stderr, "Plugin: %s has %d arguments\n",
732
530
for(char **a = p->argv; *a != NULL; a++){
733
531
fprintf(stderr, "\tArg: %s\n", *a);
734
532
}
735
fprintf(stderr, "...and %d environment variables\n", p->envc);
533
fprintf(stderr, "...and %u environment variables\n", p->envc);
736
534
for(char **a = p->environ; *a != NULL; a++){
737
535
fprintf(stderr, "\t%s\n", *a);
738
536
}
739
537
}
740
538
}
741
539
742
/* Strip permissions down to nobody */
540
ret = setuid(uid);
541
if (ret == -1){
542
perror("setuid");
543
}
544
743
545
setgid(gid);
744
if(ret == -1){
546
if (ret == -1){
745
547
perror("setgid");
746
548
}
747
ret = setuid(uid);
748
if(ret == -1){
749
perror("setuid");
549
550
dir = opendir(plugindir);
551
if(dir == NULL){
552
perror("Could not open plugin dir");
553
exitstatus = EXIT_FAILURE;
554
goto fallback;
750
555
}
751
556
752
/* Open plugin directory with close_on_exec flag */
557
/* Set the FD_CLOEXEC flag on the directory, if possible */
753
558
{
754
int dir_fd = -1;
755
if(plugindir == NULL){
756
dir_fd = open(PDIR, O_RDONLY |
757
#ifdef O_CLOEXEC
758
O_CLOEXEC
759
#else /* not O_CLOEXEC */
760
0
761
#endif /* not O_CLOEXEC */
762
);
763
} else {
764
dir_fd = open(plugindir, O_RDONLY |
765
#ifdef O_CLOEXEC
766
O_CLOEXEC
767
#else /* not O_CLOEXEC */
768
0
769
#endif /* not O_CLOEXEC */
770
);
771
}
772
if(dir_fd == -1){
773
perror("Could not open plugin dir");
774
exitstatus = EXIT_FAILURE;
775
goto fallback;
776
}
777
778
#ifndef O_CLOEXEC
779
/* Set the FD_CLOEXEC flag on the directory */
780
ret = set_cloexec_flag(dir_fd);
781
if(ret < 0){
782
perror("set_cloexec_flag");
783
TEMP_FAILURE_RETRY(close(dir_fd));
784
exitstatus = EXIT_FAILURE;
785
goto fallback;
786
}
787
#endif /* O_CLOEXEC */
788
789
dir = fdopendir(dir_fd);
790
if(dir == NULL){
791
perror("Could not open plugin dir");
792
TEMP_FAILURE_RETRY(close(dir_fd));
793
exitstatus = EXIT_FAILURE;
794
goto fallback;
559
int dir_fd = dirfd(dir);
560
if(dir_fd >= 0){
561
ret = set_cloexec_flag(dir_fd);
562
if(ret < 0){
563
perror("set_cloexec_flag");
564
exitstatus = EXIT_FAILURE;
565
goto fallback;
566
}
795
567
}
796
568
}
797
569
798
570
FD_ZERO(&rfds_all);
799
571
800
/* Read and execute any executable in the plugin directory*/
801
572
while(true){
802
do {
803
dirst = readdir(dir);
804
} while(dirst == NULL and errno == EINTR);
573
dirst = readdir(dir);
805
574
806
/* All directory entries have been processed */
575
// All directory entries have been processed
807
576
if(dirst == NULL){
808
if(errno == EBADF){
577
if (errno == EBADF){
809
578
perror("readdir");
810
579
exitstatus = EXIT_FAILURE;
811
580
goto fallback;
815
584
816
585
d_name_len = strlen(dirst->d_name);
817
586
818
/* Ignore dotfiles, backup files and other junk */
587
// Ignore dotfiles, backup files and other junk
819
588
{
820
589
bool bad_name = false;
821
590
823
592
824
593
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
825
594
".dpkg-old",
826
".dpkg-bak",
827
595
".dpkg-divert", NULL };
828
596
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
829
597
size_t pre_len = strlen(*pre);
837
605
break;
838
606
}
839
607
}
608
840
609
if(bad_name){
841
610
continue;
842
611
}
612
843
613
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
844
614
size_t suf_len = strlen(*suf);
845
615
if((d_name_len >= suf_len)
858
628
continue;
859
629
}
860
630
}
861
631
862
632
char *filename;
863
if(plugindir == NULL){
864
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
865
dirst->d_name));
866
} else {
867
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
868
plugindir,
869
dirst->d_name));
870
}
633
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
871
634
if(ret < 0){
872
635
perror("asprintf");
873
636
continue;
874
637
}
875
638
876
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
877
if(ret == -1){
639
ret = stat(filename, &st);
640
if (ret == -1){
878
641
perror("stat");
879
642
free(filename);
880
643
continue;
881
644
}
882
645
883
/* Ignore non-executable files */
884
if(not S_ISREG(st.st_mode)
885
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
646
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
886
647
if(debug){
887
648
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
888
649
" with bad type or mode\n", filename);
890
651
free(filename);
891
652
continue;
892
653
}
893
894
plugin *p = getplugin(dirst->d_name);
654
plugin *p = getplugin(dirst->d_name, &plugin_list);
895
655
if(p == NULL){
896
656
perror("getplugin");
897
657
free(filename);
907
667
}
908
668
{
909
669
/* Add global arguments to argument list for this plugin */
910
plugin *g = getplugin(NULL);
670
plugin *g = getplugin(NULL, &plugin_list);
911
671
if(g != NULL){
912
672
for(char **a = g->argv + 1; *a != NULL; a++){
913
673
if(not add_argument(p, *a)){
916
676
}
917
677
/* Add global environment variables */
918
678
for(char **e = g->environ; *e != NULL; e++){
919
if(not add_environment(p, *e, false)){
679
if(not add_environment(p, *e)){
920
680
perror("add_environment");
921
681
}
922
682
}
927
687
process, too. */
928
688
if(p->environ[0] != NULL){
929
689
for(char **e = environ; *e != NULL; e++){
930
if(not add_environment(p, *e, false)){
690
char *copy = strdup(*e);
691
if(copy == NULL){
692
perror("strdup");
693
continue;
694
}
695
if(not add_environment(p, copy)){
931
696
perror("add_environment");
932
697
}
933
698
}
934
699
}
935
700
936
701
int pipefd[2];
937
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
938
if(ret == -1){
702
ret = pipe(pipefd);
703
if (ret == -1){
939
704
perror("pipe");
940
705
exitstatus = EXIT_FAILURE;
941
706
goto fallback;
942
707
}
943
/* Ask OS to automatic close the pipe on exec */
944
708
ret = set_cloexec_flag(pipefd[0]);
945
709
if(ret < 0){
946
710
perror("set_cloexec_flag");
954
718
goto fallback;
955
719
}
956
720
/* Block SIGCHLD until process is safely in process list */
957
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
958
&sigchld_action.sa_mask,
959
NULL));
721
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
960
722
if(ret < 0){
961
723
perror("sigprocmask");
962
724
exitstatus = EXIT_FAILURE;
963
725
goto fallback;
964
726
}
965
/* Starting a new process to be watched */
966
pid_t pid;
967
do {
968
pid = fork();
969
} while(pid == -1 and errno == EINTR);
727
// Starting a new process to be watched
728
pid_t pid = fork();
970
729
if(pid == -1){
971
730
perror("fork");
972
731
exitstatus = EXIT_FAILURE;
979
738
perror("sigaction");
980
739
_exit(EXIT_FAILURE);
981
740
}
982
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
741
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
983
742
if(ret < 0){
984
743
perror("sigprocmask");
985
744
_exit(EXIT_FAILURE);
986
745
}
987
746
988
747
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
989
748
if(ret == -1){
990
749
perror("dup2");
1009
768
}
1010
769
/* no return */
1011
770
}
1012
/* Parent process */
1013
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1014
pipe */
771
/* parent process */
1015
772
free(filename);
1016
plugin *new_plugin = getplugin(dirst->d_name);
1017
if(new_plugin == NULL){
1018
perror("getplugin");
1019
ret = (int)(TEMP_FAILURE_RETRY
1020
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1021
NULL)));
773
close(pipefd[1]); /* close unused write end of pipe */
774
process *new_process = malloc(sizeof(process));
775
if (new_process == NULL){
776
perror("malloc");
777
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1022
778
if(ret < 0){
1023
perror("sigprocmask");
779
perror("sigprocmask");
1024
780
}
1025
781
exitstatus = EXIT_FAILURE;
1026
782
goto fallback;
1027
783
}
1028
784
1029
new_plugin->pid = pid;
1030
new_plugin->fd = pipefd[0];
1031
785
*new_process = (struct process){ .pid = pid,
786
.fd = pipefd[0],
787
.next = process_list };
788
// List handling
789
process_list = new_process;
1032
790
/* Unblock SIGCHLD so signal handler can be run if this process
1033
791
has already completed */
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1035
&sigchld_action.sa_mask,
1036
NULL));
792
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
793
if(ret < 0){
1038
794
perror("sigprocmask");
1039
795
exitstatus = EXIT_FAILURE;
1040
796
goto fallback;
1041
797
}
1042
798
1043
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1044
-Wconversion */
799
FD_SET(new_process->fd, &rfds_all);
1045
800
1046
if(maxfd < new_plugin->fd){
1047
maxfd = new_plugin->fd;
801
if (maxfd < new_process->fd){
802
maxfd = new_process->fd;
1048
803
}
804
1049
805
}
1050
806
1051
TEMP_FAILURE_RETRY(closedir(dir));
807
free_plugin_list(plugin_list);
808
plugin_list = NULL;
809
810
closedir(dir);
1052
811
dir = NULL;
1053
free_plugin(getplugin(NULL));
1054
1055
for(plugin *p = plugin_list; p != NULL; p = p->next){
1056
if(p->pid != 0){
1057
break;
1058
}
1059
if(p->next == NULL){
1060
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1061
" directory?\n");
1062
free_plugin_list();
1063
}
812
813
if (process_list == NULL){
814
fprintf(stderr, "No plugin processes started. Incorrect plugin"
815
" directory?\n");
816
process_list = NULL;
1064
817
}
1065
1066
/* Main loop while running plugins exist */
1067
while(plugin_list){
818
while(process_list){
1068
819
fd_set rfds = rfds_all;
1069
820
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1070
if(select_ret == -1 and errno != EINTR){
821
if (select_ret == -1){
1071
822
perror("select");
1072
823
exitstatus = EXIT_FAILURE;
1073
824
goto fallback;
1074
825
}
1075
826
/* OK, now either a process completed, or something can be read
1076
827
from one of them */
1077
for(plugin *proc = plugin_list; proc != NULL;){
828
for(process *proc = process_list; proc ; proc = proc->next){
1078
829
/* Is this process completely done? */
1079
if(proc->completed and proc->eof){
830
if(proc->eof and proc->completed){
1080
831
/* Only accept the plugin output if it exited cleanly */
1081
832
if(not WIFEXITED(proc->status)
1082
833
or WEXITSTATUS(proc->status) != 0){
1083
834
/* Bad exit by plugin */
1084
1085
835
if(debug){
1086
836
if(WIFEXITED(proc->status)){
1087
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1088
" status %d\n", proc->name,
1089
(intmax_t) (proc->pid),
837
fprintf(stderr, "Plugin %u exited with status %d\n",
838
(unsigned int) (proc->pid),
1090
839
WEXITSTATUS(proc->status));
1091
} else if(WIFSIGNALED(proc->status)){
1092
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1093
" signal %d: %s\n", proc->name,
1094
(intmax_t) (proc->pid),
1095
WTERMSIG(proc->status),
1096
strsignal(WTERMSIG(proc->status)));
840
} else if(WIFSIGNALED(proc->status)) {
841
fprintf(stderr, "Plugin %u killed by signal %d\n",
842
(unsigned int) (proc->pid),
843
WTERMSIG(proc->status));
1097
844
} else if(WCOREDUMP(proc->status)){
1098
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1099
" core\n", proc->name, (intmax_t) (proc->pid));
845
fprintf(stderr, "Plugin %d dumped core\n",
846
(unsigned int) (proc->pid));
1100
847
}
1101
848
}
1102
1103
849
/* Remove the plugin */
1104
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion */
1106
850
FD_CLR(proc->fd, &rfds_all);
1107
851
/* Block signal while modifying process_list */
1108
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1109
(SIG_BLOCK,
1110
&sigchld_action.sa_mask,
1111
NULL));
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1112
853
if(ret < 0){
1113
854
perror("sigprocmask");
1114
855
exitstatus = EXIT_FAILURE;
1115
856
goto fallback;
1116
857
}
1117
1118
plugin *next_plugin = proc->next;
1119
free_plugin(proc);
1120
proc = next_plugin;
1121
858
/* Delete this process entry from the list */
859
if(process_list == proc){
860
/* First one - simple */
861
process_list = proc->next;
862
} else {
863
/* Second one or later */
864
for(process *p = process_list; p != NULL; p = p->next){
865
if(p->next == proc){
866
p->next = proc->next;
867
break;
868
}
869
}
870
}
1122
871
/* We are done modifying process list, so unblock signal */
1123
ret = (int)(TEMP_FAILURE_RETRY
1124
(sigprocmask(SIG_UNBLOCK,
1125
&sigchld_action.sa_mask, NULL)));
872
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
873
NULL);
1126
874
if(ret < 0){
1127
875
perror("sigprocmask");
1128
exitstatus = EXIT_FAILURE;
1129
goto fallback;
1130
}
1131
1132
if(plugin_list == NULL){
1133
break;
1134
}
1135
1136
continue;
876
}
877
free(proc->buffer);
878
free(proc);
879
/* We deleted this process from the list, so we can't go
880
proc->next. Therefore, start over from the beginning of
881
the process list */
882
break;
1137
883
}
1138
1139
884
/* This process exited nicely, so print its buffer */
1140
885
1141
886
bool bret = print_out_password(proc->buffer,
1142
887
proc->buffer_length);
1143
888
if(not bret){
1146
891
}
1147
892
goto fallback;
1148
893
}
1149
1150
894
/* This process has not completed. Does it have any output? */
1151
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1152
warning from
1153
-Wconversion */
895
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1154
896
/* This process had nothing to say at this time */
1155
proc = proc->next;
1156
897
continue;
1157
898
}
1158
899
/* Before reading, make the process' data buffer large enough */
1159
900
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1160
901
proc->buffer = realloc(proc->buffer, proc->buffer_size
1161
902
+ (size_t) BUFFER_SIZE);
1162
if(proc->buffer == NULL){
903
if (proc->buffer == NULL){
1163
904
perror("malloc");
1164
905
exitstatus = EXIT_FAILURE;
1165
906
goto fallback;
1167
908
proc->buffer_size += BUFFER_SIZE;
1168
909
}
1169
910
/* Read from the process */
1170
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1171
proc->buffer
1172
+ proc->buffer_length,
1173
BUFFER_SIZE));
1174
if(sret < 0){
911
ret = read(proc->fd, proc->buffer + proc->buffer_length,
912
BUFFER_SIZE);
913
if(ret < 0){
1175
914
/* Read error from this process; ignore the error */
1176
proc = proc->next;
1177
915
continue;
1178
916
}
1179
if(sret == 0){
917
if(ret == 0){
1180
918
/* got EOF */
1181
919
proc->eof = true;
1182
920
} else {
1183
proc->buffer_length += (size_t) sret;
921
proc->buffer_length += (size_t) ret;
1184
922
}
1185
923
}
1186
924
}
1187
1188
925
926
1189
927
fallback:
1190
928
1191
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
929
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1192
930
/* Fallback if all plugins failed, none are found or an error
1193
931
occured */
1194
932
bool bret;
1195
933
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1196
934
char *passwordbuffer = getpass("Password: ");
1197
size_t len = strlen(passwordbuffer);
1198
/* Strip trailing newline */
1199
if(len > 0 and passwordbuffer[len-1] == '\n'){
1200
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1201
len--;
1202
}
1203
bret = print_out_password(passwordbuffer, len);
935
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1204
936
if(not bret){
1205
937
perror("print_out_password");
1206
938
exitstatus = EXIT_FAILURE;
1213
945
perror("sigaction");
1214
946
exitstatus = EXIT_FAILURE;
1215
947
}
1216
948
1217
949
if(custom_argv != NULL){
1218
for(char **arg = custom_argv+1; *arg != NULL; arg++){
950
for(char **arg = custom_argv; *arg != NULL; arg++){
1219
951
free(*arg);
1220
952
}
1221
953
free(custom_argv);
1222
954
}
955
free_plugin_list(plugin_list);
1223
956
1224
957
if(dir != NULL){
1225
958
closedir(dir);
1226
959
}
1227
960
1228
/* Kill the processes */
1229
for(plugin *p = plugin_list; p != NULL; p = p->next){
1230
if(p->pid != 0){
1231
close(p->fd);
1232
ret = kill(p->pid, SIGTERM);
1233
if(ret == -1 and errno != ESRCH){
1234
/* Set-uid proccesses might not get closed */
1235
perror("kill");
1236
}
961
/* Free the process list and kill the processes */
962
for(process *next; process_list != NULL; process_list = next){
963
next = process_list->next;
964
close(process_list->fd);
965
ret = kill(process_list->pid, SIGTERM);
966
if(ret == -1 and errno != ESRCH){
967
/* set-uid proccesses migth not get closed */
968
perror("kill");
1237
969
}
970
free(process_list->buffer);
971
free(process_list);
1238
972
}
1239
973
1240
974
/* Wait for any remaining child processes to terminate */
1241
do {
975
do{
1242
976
ret = wait(NULL);
1243
977
} while(ret >= 0);
1244
978
if(errno != ECHILD){
1245
979
perror("wait");
1246
980
}
1247
981
1248
free_plugin_list();
1249
1250
free(plugindir);
1251
free(argfile);
1252
1253
982
return exitstatus;
1254
983
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0