To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 397
- compare with another revision
- download diff
- download tarball
- view history from revision 397
- Committer: Teddy Hogeborn
- Date: 2009-10-30 16:23:43 UTC
- Revision ID: teddy@fukt.bsnet.se-20091030162343-1p2a8bf3gc084kc9
* plugins.d/password-prompt.c: Use environment variables and prompt
text from cryptsetup 1.1.
* plugins.d/password-prompt.xml (ENVIRONMENT): Document change in
environment variables
used.
text from cryptsetup 1.1.
* plugins.d/password-prompt.xml (ENVIRONMENT): Document change in
environment variables
used.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- plugins.d/usplash
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- 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() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
65
72
66
73
#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";
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;
70
79
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
80
72
struct process;
73
74
typedef struct process{
81
typedef struct plugin{
82
char *name; /* can be NULL or any plugin name */
83
char **argv;
84
int argc;
85
char **environ;
86
int envc;
87
bool disabled;
88
89
/* Variables used for running processes*/
75
90
pid_t pid;
76
91
int fd;
77
92
char *buffer;
78
93
size_t buffer_size;
79
94
size_t buffer_length;
80
95
bool eof;
81
bool completed;
96
volatile sig_atomic_t completed;
82
97
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
char **environ;
91
int envc;
92
bool disabled;
93
98
struct plugin *next;
94
99
} plugin;
95
100
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))){
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))){
100
110
return p;
101
111
}
102
112
}
103
113
/* Create a new plugin */
104
plugin *new_plugin = malloc(sizeof(plugin));
105
if (new_plugin == NULL){
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){
106
119
return NULL;
107
120
}
108
121
char *copy_name = NULL;
109
122
if(name != NULL){
110
copy_name = strdup(name);
123
do {
124
copy_name = strdup(name);
125
} while(copy_name == NULL and errno == EINTR);
111
126
if(copy_name == NULL){
127
int e = errno;
128
free(new_plugin);
129
errno = e;
112
130
return NULL;
113
131
}
114
132
}
115
133
116
*new_plugin = (plugin) { .name = copy_name,
117
.argc = 1,
118
.envc = 0,
119
.disabled = false,
120
.next = *plugin_list };
134
*new_plugin = (plugin){ .name = copy_name,
135
.argc = 1,
136
.disabled = false,
137
.next = plugin_list };
121
138
122
new_plugin->argv = malloc(sizeof(char *) * 2);
123
if (new_plugin->argv == NULL){
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;
124
144
free(copy_name);
125
145
free(new_plugin);
146
errno = e;
126
147
return NULL;
127
148
}
128
149
new_plugin->argv[0] = copy_name;
129
150
new_plugin->argv[1] = NULL;
130
131
new_plugin->environ = malloc(sizeof(char *));
151
152
do {
153
new_plugin->environ = malloc(sizeof(char *));
154
} while(new_plugin->environ == NULL and errno == EINTR);
132
155
if(new_plugin->environ == NULL){
156
int e = errno;
133
157
free(copy_name);
134
158
free(new_plugin->argv);
135
159
free(new_plugin);
160
errno = e;
136
161
return NULL;
137
162
}
138
163
new_plugin->environ[0] = NULL;
164
139
165
/* Append the new plugin to the list */
140
*plugin_list = new_plugin;
166
plugin_list = new_plugin;
141
167
return new_plugin;
142
168
}
143
169
145
171
static bool add_to_char_array(const char *new, char ***array,
146
172
int *len){
147
173
/* Resize the pointed-to array to hold one more pointer */
148
*array = realloc(*array, sizeof(char *)
149
* (size_t) ((*len) + 2));
174
do {
175
*array = realloc(*array, sizeof(char *)
176
* (size_t) ((*len) + 2));
177
} while(*array == NULL and errno == EINTR);
150
178
/* Malloc check */
151
179
if(*array == NULL){
152
180
return false;
153
181
}
154
182
/* Make a copy of the new string */
155
char *copy = strdup(new);
183
char *copy;
184
do {
185
copy = strdup(new);
186
} while(copy == NULL and errno == EINTR);
156
187
if(copy == NULL){
157
188
return false;
158
189
}
173
204
}
174
205
175
206
/* Add to a plugin's environment */
176
static bool add_environment(plugin *p, const char *def){
207
static bool add_environment(plugin *p, const char *def, bool replace){
177
208
if(p == NULL){
178
209
return false;
179
210
}
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
}
180
231
return add_to_char_array(def, &(p->environ), &(p->envc));
181
232
}
182
233
183
184
234
/*
185
235
* Based on the example in the GNU LibC manual chapter 13.13 "File
186
236
* Descriptor Flags".
187
* *Note File Descriptor Flags:(libc)Descriptor Flags.
237
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
188
238
*/
189
static int set_cloexec_flag(int fd)
190
{
191
int ret = fcntl(fd, F_GETFD, 0);
239
static int set_cloexec_flag(int fd){
240
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
192
241
/* If reading the flags failed, return error indication now. */
193
242
if(ret < 0){
194
243
return ret;
195
244
}
196
245
/* Store modified flag word in the descriptor. */
197
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
246
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
247
ret | FD_CLOEXEC));
198
248
}
199
249
200
process *process_list = NULL;
201
250
202
/* Mark processes as completed when it exits, and save its exit
251
/* Mark processes as completed when they exit, and save their exit
203
252
status. */
204
void handle_sigchld(__attribute__((unused)) int sig){
205
process *proc = process_list;
253
static void handle_sigchld(__attribute__((unused)) int sig){
254
int old_errno = errno;
206
255
while(true){
256
plugin *proc = plugin_list;
207
257
int status;
208
258
pid_t pid = waitpid(-1, &status, WNOHANG);
209
259
if(pid == 0){
260
/* Only still running child processes */
210
261
break;
211
262
}
212
263
if(pid == -1){
213
if (errno != ECHILD){
214
perror("waitpid");
264
if(errno == ECHILD){
265
/* No child processes */
266
break;
215
267
}
216
return;
268
perror("waitpid");
217
269
}
218
270
271
/* A child exited, find it in process_list */
219
272
while(proc != NULL and proc->pid != pid){
220
273
proc = proc->next;
221
274
}
224
277
continue;
225
278
}
226
279
proc->status = status;
227
proc->completed = true;
280
proc->completed = 1;
228
281
}
282
errno = old_errno;
229
283
}
230
284
231
bool print_out_password(const char *buffer, size_t length){
285
/* Prints out a password to stdout */
286
static bool print_out_password(const char *buffer, size_t length){
232
287
ssize_t ret;
233
if(length>0 and buffer[length-1] == '\n'){
234
length--;
235
}
236
288
for(size_t written = 0; written < length; written += (size_t)ret){
237
289
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
238
290
length - written));
243
295
return true;
244
296
}
245
297
246
char **add_to_argv(char **argv, int *argc, char *arg){
247
if (argv == NULL){
248
*argc = 1;
249
argv = malloc(sizeof(char*) * 2);
250
if(argv == NULL){
251
return NULL;
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
}
252
322
}
253
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
254
argv[1] = NULL;
255
}
256
*argc += 1;
257
argv = realloc(argv, sizeof(char *)
258
* ((unsigned int) *argc + 1));
259
if(argv == NULL){
260
return NULL;
261
}
262
argv[*argc-1] = arg;
263
argv[*argc] = NULL;
264
return argv;
323
}
324
325
free(plugin_node);
265
326
}
266
327
267
static void free_plugin_list(plugin *plugin_list){
268
for(plugin *next; plugin_list != NULL; plugin_list = next){
269
next = plugin_list->next;
270
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
271
free(*arg);
272
}
273
free(plugin_list->argv);
274
for(char **env = plugin_list->environ; *env != NULL; env++){
275
free(*env);
276
}
277
free(plugin_list->environ);
278
free(plugin_list);
328
static void free_plugin_list(void){
329
while(plugin_list != NULL){
330
free_plugin(plugin_list);
279
331
}
280
332
}
281
333
282
334
int main(int argc, char *argv[]){
283
const char *plugindir = "/lib/mandos/plugins.d";
284
const char *argfile = ARGFILE;
335
char *plugindir = NULL;
336
char *argfile = NULL;
285
337
FILE *conffp;
286
338
size_t d_name_len;
287
339
DIR *dir = NULL;
289
341
struct stat st;
290
342
fd_set rfds_all;
291
343
int ret, maxfd = 0;
344
ssize_t sret;
292
345
uid_t uid = 65534;
293
346
gid_t gid = 65534;
294
347
bool debug = false;
319
372
{ .name = "global-options", .key = 'g',
320
373
.arg = "OPTION[,OPTION[,...]]",
321
374
.doc = "Options passed to all plugins" },
322
{ .name = "global-envs", .key = 'e',
375
{ .name = "global-env", .key = 'G',
323
376
.arg = "VAR=value",
324
377
.doc = "Environment variable passed to all plugins" },
325
378
{ .name = "options-for", .key = 'o',
326
379
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
327
380
.doc = "Options passed only to specified plugin" },
328
{ .name = "envs-for", .key = 'f',
381
{ .name = "env-for", .key = 'E',
329
382
.arg = "PLUGIN:ENV=value",
330
383
.doc = "Environment variable passed to specified plugin" },
331
384
{ .name = "disable", .key = 'd',
332
385
.arg = "PLUGIN",
333
386
.doc = "Disable a specific plugin", .group = 1 },
387
{ .name = "enable", .key = 'e',
388
.arg = "PLUGIN",
389
.doc = "Enable a specific plugin", .group = 1 },
334
390
{ .name = "plugin-dir", .key = 128,
335
391
.arg = "DIRECTORY",
336
392
.doc = "Specify a different plugin directory", .group = 2 },
337
{ .name = "userid", .key = 129,
338
.arg = "ID", .flags = 0,
339
.doc = "User ID the plugins will run as", .group = 2 },
340
{ .name = "groupid", .key = 130,
341
.arg = "ID", .flags = 0,
342
.doc = "Group ID the plugins will run as", .group = 2 },
343
{ .name = "debug", .key = 131,
344
.doc = "Debug mode", .group = 3 },
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 },
345
413
{ .name = NULL }
346
414
};
347
415
348
error_t parse_opt (int key, char *arg, struct argp_state *state) {
349
/* Get the INPUT argument from `argp_parse', which we know is a
350
pointer to our plugin list pointer. */
351
plugin **plugins = state->input;
352
switch (key) {
353
case 'g':
354
if (arg != NULL){
355
char *p;
356
while((p = strsep(&arg, ",")) != NULL){
357
if(p[0] == '\0'){
358
continue;
359
}
360
if(not add_argument(getplugin(NULL, plugins), p)){
361
perror("add_argument");
362
return ARGP_ERR_UNKNOWN;
363
}
364
}
365
}
366
break;
367
case 'e':
368
if(arg == NULL){
369
break;
370
}
371
{
372
char *envdef = strdup(arg);
373
if(envdef == NULL){
374
break;
375
}
376
if(not add_environment(getplugin(NULL, plugins), envdef)){
377
perror("add_environment");
378
}
379
}
380
break;
381
case 'o':
382
if (arg != NULL){
383
char *p_name = strsep(&arg, ":");
384
if(p_name[0] == '\0'){
385
break;
386
}
387
char *opt = strsep(&arg, ":");
388
if(opt[0] == '\0'){
389
break;
390
}
391
if(opt != NULL){
392
char *p;
393
while((p = strsep(&opt, ",")) != NULL){
394
if(p[0] == '\0'){
395
continue;
396
}
397
if(not add_argument(getplugin(p_name, plugins), p)){
398
perror("add_argument");
399
return ARGP_ERR_UNKNOWN;
400
}
401
}
402
}
403
}
404
break;
405
case 'f':
406
if(arg == NULL){
407
break;
408
}
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 */
409
458
{
410
459
char *envdef = strchr(arg, ':');
411
460
if(envdef == NULL){
412
break;
413
}
414
char *p_name = strndup(arg, (size_t) (envdef-arg));
415
if(p_name == NULL){
416
break;
417
}
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*envdef = '\0';
418
466
envdef++;
419
if(not add_environment(getplugin(p_name, plugins), envdef)){
420
perror("add_environment");
421
}
422
}
423
break;
424
case 'd':
425
if (arg != NULL){
426
plugin *p = getplugin(arg, plugins);
427
if(p == NULL){
428
return ARGP_ERR_UNKNOWN;
429
}
430
p->disabled = true;
431
}
432
break;
433
case 128:
434
plugindir = arg;
435
break;
436
case 129:
437
uid = (uid_t)strtol(arg, NULL, 10);
438
break;
439
case 130:
440
gid = (gid_t)strtol(arg, NULL, 10);
441
break;
442
case 131:
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 */
443
519
debug = true;
444
520
break;
445
case ARGP_KEY_ARG:
446
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
447
break;
448
case ARGP_KEY_END:
449
break;
450
default:
451
return ARGP_ERR_UNKNOWN;
452
}
453
return 0;
454
}
455
456
plugin *plugin_list = NULL;
457
458
struct argp argp = { .options = options, .parser = parse_opt,
459
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
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 = "",
460
588
.doc = "Mandos plugin runner -- Run plugins" };
461
589
462
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
463
if (ret == ARGP_ERR_UNKNOWN){
464
fprintf(stderr, "Unknown error while parsing arguments\n");
465
exitstatus = EXIT_FAILURE;
466
goto fallback;
467
}
468
469
conffp = fopen(argfile, "r");
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
}
470
618
if(conffp != NULL){
471
619
char *org_line = NULL;
472
620
char *p, *arg, *new_arg, *line;
473
621
size_t size = 0;
474
ssize_t sret;
475
622
const char whitespace_delims[] = " \r\t\f\v\n";
476
623
const char comment_delim[] = "#";
477
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 */
478
637
while(true){
479
638
sret = getline(&org_line, &size, conffp);
480
639
if(sret == -1){
481
640
break;
482
641
}
483
642
484
643
line = org_line;
485
644
arg = strsep(&line, comment_delim);
486
645
while((p = strsep(&arg, whitespace_delims)) != NULL){
488
647
continue;
489
648
}
490
649
new_arg = strdup(p);
491
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
492
if (custom_argv == NULL){
493
perror("add_to_argv");
494
exitstatus = EXIT_FAILURE;
495
goto fallback;
496
}
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;
497
668
}
498
669
}
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
}
499
678
free(org_line);
500
} else{
679
} else {
501
680
/* Check for harmful errors and go to fallback. Other errors might
502
681
not affect opening plugins */
503
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
682
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
504
683
perror("fopen");
505
684
exitstatus = EXIT_FAILURE;
506
685
goto fallback;
507
686
}
508
687
}
509
688
/* If there were any arguments from the configuration file, pass
689
them to parser as command line arguments */
510
690
if(custom_argv != NULL){
511
custom_argv[0] = argv[0];
512
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
513
if (ret == ARGP_ERR_UNKNOWN){
514
fprintf(stderr, "Unknown error while parsing arguments\n");
515
exitstatus = EXIT_FAILURE;
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
705
goto fallback;
517
706
}
518
707
}
519
708
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
520
728
if(debug){
521
729
for(plugin *p = plugin_list; p != NULL; p=p->next){
522
730
fprintf(stderr, "Plugin: %s has %d arguments\n",
524
732
for(char **a = p->argv; *a != NULL; a++){
525
733
fprintf(stderr, "\tArg: %s\n", *a);
526
734
}
527
fprintf(stderr, "...and %u environment variables\n", p->envc);
735
fprintf(stderr, "...and %d environment variables\n", p->envc);
528
736
for(char **a = p->environ; *a != NULL; a++){
529
737
fprintf(stderr, "\t%s\n", *a);
530
738
}
531
739
}
532
740
}
533
741
742
/* Strip permissions down to nobody */
743
setgid(gid);
744
if(ret == -1){
745
perror("setgid");
746
}
534
747
ret = setuid(uid);
535
if (ret == -1){
748
if(ret == -1){
536
749
perror("setuid");
537
750
}
538
751
539
setgid(gid);
540
if (ret == -1){
541
perror("setgid");
542
}
543
544
dir = opendir(plugindir);
545
if(dir == NULL){
546
perror("Could not open plugin dir");
547
exitstatus = EXIT_FAILURE;
548
goto fallback;
549
}
550
551
/* Set the FD_CLOEXEC flag on the directory, if possible */
752
/* Open plugin directory with close_on_exec flag */
552
753
{
553
int dir_fd = dirfd(dir);
554
if(dir_fd >= 0){
555
ret = set_cloexec_flag(dir_fd);
556
if(ret < 0){
557
perror("set_cloexec_flag");
558
exitstatus = EXIT_FAILURE;
559
goto fallback;
560
}
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;
561
795
}
562
796
}
563
797
564
798
FD_ZERO(&rfds_all);
565
799
800
/* Read and execute any executable in the plugin directory*/
566
801
while(true){
567
dirst = readdir(dir);
802
do {
803
dirst = readdir(dir);
804
} while(dirst == NULL and errno == EINTR);
568
805
569
// All directory entries have been processed
806
/* All directory entries have been processed */
570
807
if(dirst == NULL){
571
if (errno == EBADF){
808
if(errno == EBADF){
572
809
perror("readdir");
573
810
exitstatus = EXIT_FAILURE;
574
811
goto fallback;
578
815
579
816
d_name_len = strlen(dirst->d_name);
580
817
581
// Ignore dotfiles, backup files and other junk
818
/* Ignore dotfiles, backup files and other junk */
582
819
{
583
820
bool bad_name = false;
584
821
586
823
587
824
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
588
825
".dpkg-old",
826
".dpkg-bak",
589
827
".dpkg-divert", NULL };
590
828
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
591
829
size_t pre_len = strlen(*pre);
599
837
break;
600
838
}
601
839
}
602
603
840
if(bad_name){
604
841
continue;
605
842
}
606
607
843
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
608
844
size_t suf_len = strlen(*suf);
609
845
if((d_name_len >= suf_len)
622
858
continue;
623
859
}
624
860
}
625
861
626
862
char *filename;
627
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
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
}
628
871
if(ret < 0){
629
872
perror("asprintf");
630
873
continue;
631
874
}
632
875
633
ret = stat(filename, &st);
634
if (ret == -1){
876
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
877
if(ret == -1){
635
878
perror("stat");
636
879
free(filename);
637
880
continue;
638
881
}
639
882
640
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
883
/* Ignore non-executable files */
884
if(not S_ISREG(st.st_mode)
885
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
641
886
if(debug){
642
887
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
643
888
" with bad type or mode\n", filename);
645
890
free(filename);
646
891
continue;
647
892
}
648
plugin *p = getplugin(dirst->d_name, &plugin_list);
893
894
plugin *p = getplugin(dirst->d_name);
649
895
if(p == NULL){
650
896
perror("getplugin");
651
897
free(filename);
661
907
}
662
908
{
663
909
/* Add global arguments to argument list for this plugin */
664
plugin *g = getplugin(NULL, &plugin_list);
910
plugin *g = getplugin(NULL);
665
911
if(g != NULL){
666
912
for(char **a = g->argv + 1; *a != NULL; a++){
667
913
if(not add_argument(p, *a)){
670
916
}
671
917
/* Add global environment variables */
672
918
for(char **e = g->environ; *e != NULL; e++){
673
if(not add_environment(p, *e)){
919
if(not add_environment(p, *e, false)){
674
920
perror("add_environment");
675
921
}
676
922
}
681
927
process, too. */
682
928
if(p->environ[0] != NULL){
683
929
for(char **e = environ; *e != NULL; e++){
684
char *copy = strdup(*e);
685
if(copy == NULL){
686
perror("strdup");
687
continue;
688
}
689
if(not add_environment(p, copy)){
930
if(not add_environment(p, *e, false)){
690
931
perror("add_environment");
691
932
}
692
933
}
693
934
}
694
935
695
936
int pipefd[2];
696
ret = pipe(pipefd);
697
if (ret == -1){
937
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
938
if(ret == -1){
698
939
perror("pipe");
699
940
exitstatus = EXIT_FAILURE;
700
941
goto fallback;
701
942
}
943
/* Ask OS to automatic close the pipe on exec */
702
944
ret = set_cloexec_flag(pipefd[0]);
703
945
if(ret < 0){
704
946
perror("set_cloexec_flag");
712
954
goto fallback;
713
955
}
714
956
/* Block SIGCHLD until process is safely in process list */
715
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
957
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
958
&sigchld_action.sa_mask,
959
NULL));
716
960
if(ret < 0){
717
961
perror("sigprocmask");
718
962
exitstatus = EXIT_FAILURE;
719
963
goto fallback;
720
964
}
721
// Starting a new process to be watched
722
pid_t pid = fork();
965
/* Starting a new process to be watched */
966
pid_t pid;
967
do {
968
pid = fork();
969
} while(pid == -1 and errno == EINTR);
723
970
if(pid == -1){
724
971
perror("fork");
725
972
exitstatus = EXIT_FAILURE;
732
979
perror("sigaction");
733
980
_exit(EXIT_FAILURE);
734
981
}
735
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
982
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
736
983
if(ret < 0){
737
984
perror("sigprocmask");
738
985
_exit(EXIT_FAILURE);
739
986
}
740
987
741
988
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
742
989
if(ret == -1){
743
990
perror("dup2");
762
1009
}
763
1010
/* no return */
764
1011
}
765
/* parent process */
1012
/* Parent process */
1013
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1014
pipe */
766
1015
free(filename);
767
close(pipefd[1]); /* close unused write end of pipe */
768
process *new_process = malloc(sizeof(process));
769
if (new_process == NULL){
770
perror("malloc");
771
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
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)));
772
1022
if(ret < 0){
773
perror("sigprocmask");
1023
perror("sigprocmask");
774
1024
}
775
1025
exitstatus = EXIT_FAILURE;
776
1026
goto fallback;
777
1027
}
778
1028
779
*new_process = (struct process){ .pid = pid,
780
.fd = pipefd[0],
781
.next = process_list };
782
// List handling
783
process_list = new_process;
1029
new_plugin->pid = pid;
1030
new_plugin->fd = pipefd[0];
1031
784
1032
/* Unblock SIGCHLD so signal handler can be run if this process
785
1033
has already completed */
786
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1035
&sigchld_action.sa_mask,
1036
NULL));
787
1037
if(ret < 0){
788
1038
perror("sigprocmask");
789
1039
exitstatus = EXIT_FAILURE;
790
1040
goto fallback;
791
1041
}
792
1042
793
FD_SET(new_process->fd, &rfds_all);
1043
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1044
-Wconversion */
794
1045
795
if (maxfd < new_process->fd){
796
maxfd = new_process->fd;
1046
if(maxfd < new_plugin->fd){
1047
maxfd = new_plugin->fd;
797
1048
}
798
799
1049
}
800
1050
801
free_plugin_list(plugin_list);
802
plugin_list = NULL;
803
804
closedir(dir);
1051
TEMP_FAILURE_RETRY(closedir(dir));
805
1052
dir = NULL;
806
807
if (process_list == NULL){
808
fprintf(stderr, "No plugin processes started. Incorrect plugin"
809
" directory?\n");
810
process_list = 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
}
811
1064
}
812
while(process_list){
1065
1066
/* Main loop while running plugins exist */
1067
while(plugin_list){
813
1068
fd_set rfds = rfds_all;
814
1069
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
815
if (select_ret == -1){
1070
if(select_ret == -1 and errno != EINTR){
816
1071
perror("select");
817
1072
exitstatus = EXIT_FAILURE;
818
1073
goto fallback;
819
1074
}
820
1075
/* OK, now either a process completed, or something can be read
821
1076
from one of them */
822
for(process *proc = process_list; proc ; proc = proc->next){
1077
for(plugin *proc = plugin_list; proc != NULL;){
823
1078
/* Is this process completely done? */
824
if(proc->eof and proc->completed){
1079
if(proc->completed and proc->eof){
825
1080
/* Only accept the plugin output if it exited cleanly */
826
1081
if(not WIFEXITED(proc->status)
827
1082
or WEXITSTATUS(proc->status) != 0){
828
1083
/* Bad exit by plugin */
1084
829
1085
if(debug){
830
1086
if(WIFEXITED(proc->status)){
831
fprintf(stderr, "Plugin %u exited with status %d\n",
832
(unsigned int) (proc->pid),
1087
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1088
" status %d\n", proc->name,
1089
(intmax_t) (proc->pid),
833
1090
WEXITSTATUS(proc->status));
834
} else if(WIFSIGNALED(proc->status)) {
835
fprintf(stderr, "Plugin %u killed by signal %d\n",
836
(unsigned int) (proc->pid),
837
WTERMSIG(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)));
838
1097
} else if(WCOREDUMP(proc->status)){
839
fprintf(stderr, "Plugin %d dumped core\n",
840
(unsigned int) (proc->pid));
1098
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1099
" core\n", proc->name, (intmax_t) (proc->pid));
841
1100
}
842
1101
}
1102
843
1103
/* Remove the plugin */
844
FD_CLR(proc->fd, &rfds_all);
1104
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion */
1106
845
1107
/* Block signal while modifying process_list */
846
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1108
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1109
(SIG_BLOCK,
1110
&sigchld_action.sa_mask,
1111
NULL));
847
1112
if(ret < 0){
848
1113
perror("sigprocmask");
849
1114
exitstatus = EXIT_FAILURE;
850
1115
goto fallback;
851
1116
}
852
/* Delete this process entry from the list */
853
if(process_list == proc){
854
/* First one - simple */
855
process_list = proc->next;
856
} else {
857
/* Second one or later */
858
for(process *p = process_list; p != NULL; p = p->next){
859
if(p->next == proc){
860
p->next = proc->next;
861
break;
862
}
863
}
864
}
1117
1118
plugin *next_plugin = proc->next;
1119
free_plugin(proc);
1120
proc = next_plugin;
1121
865
1122
/* We are done modifying process list, so unblock signal */
866
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
867
NULL);
1123
ret = (int)(TEMP_FAILURE_RETRY
1124
(sigprocmask(SIG_UNBLOCK,
1125
&sigchld_action.sa_mask, NULL)));
868
1126
if(ret < 0){
869
1127
perror("sigprocmask");
870
}
871
free(proc->buffer);
872
free(proc);
873
/* We deleted this process from the list, so we can't go
874
proc->next. Therefore, start over from the beginning of
875
the process list */
876
break;
1128
exitstatus = EXIT_FAILURE;
1129
goto fallback;
1130
}
1131
1132
if(plugin_list == NULL){
1133
break;
1134
}
1135
1136
continue;
877
1137
}
1138
878
1139
/* This process exited nicely, so print its buffer */
879
880
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1140
1141
bool bret = print_out_password(proc->buffer,
1142
proc->buffer_length);
881
1143
if(not bret){
882
1144
perror("print_out_password");
883
1145
exitstatus = EXIT_FAILURE;
884
1146
}
885
1147
goto fallback;
886
1148
}
1149
887
1150
/* This process has not completed. Does it have any output? */
888
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1151
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1152
warning from
1153
-Wconversion */
889
1154
/* This process had nothing to say at this time */
1155
proc = proc->next;
890
1156
continue;
891
1157
}
892
1158
/* Before reading, make the process' data buffer large enough */
893
1159
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
894
1160
proc->buffer = realloc(proc->buffer, proc->buffer_size
895
1161
+ (size_t) BUFFER_SIZE);
896
if (proc->buffer == NULL){
1162
if(proc->buffer == NULL){
897
1163
perror("malloc");
898
1164
exitstatus = EXIT_FAILURE;
899
1165
goto fallback;
901
1167
proc->buffer_size += BUFFER_SIZE;
902
1168
}
903
1169
/* Read from the process */
904
ret = read(proc->fd, proc->buffer + proc->buffer_length,
905
BUFFER_SIZE);
906
if(ret < 0){
1170
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1171
proc->buffer
1172
+ proc->buffer_length,
1173
BUFFER_SIZE));
1174
if(sret < 0){
907
1175
/* Read error from this process; ignore the error */
1176
proc = proc->next;
908
1177
continue;
909
1178
}
910
if(ret == 0){
1179
if(sret == 0){
911
1180
/* got EOF */
912
1181
proc->eof = true;
913
1182
} else {
914
proc->buffer_length += (size_t) ret;
1183
proc->buffer_length += (size_t) sret;
915
1184
}
916
1185
}
917
1186
}
918
919
1187
1188
920
1189
fallback:
921
1190
922
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
923
/* Fallback if all plugins failed, none are found or an error occured */
1191
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1192
/* Fallback if all plugins failed, none are found or an error
1193
occured */
924
1194
bool bret;
925
1195
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
926
1196
char *passwordbuffer = getpass("Password: ");
927
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
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);
928
1204
if(not bret){
929
1205
perror("print_out_password");
930
1206
exitstatus = EXIT_FAILURE;
937
1213
perror("sigaction");
938
1214
exitstatus = EXIT_FAILURE;
939
1215
}
940
1216
941
1217
if(custom_argv != NULL){
942
for(char **arg = custom_argv; *arg != NULL; arg++){
1218
for(char **arg = custom_argv+1; *arg != NULL; arg++){
943
1219
free(*arg);
944
1220
}
945
1221
free(custom_argv);
946
1222
}
947
free_plugin_list(plugin_list);
948
1223
949
1224
if(dir != NULL){
950
1225
closedir(dir);
951
1226
}
952
1227
953
/* Free the process list and kill the processes */
954
for(process *next; process_list != NULL; process_list = next){
955
next = process_list->next;
956
close(process_list->fd);
957
ret = kill(process_list->pid, SIGTERM);
958
if(ret == -1 and errno != ESRCH){
959
/* set-uid proccesses migth not get closed */
960
perror("kill");
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
1237
}
962
free(process_list->buffer);
963
free(process_list);
964
1238
}
965
1239
966
1240
/* Wait for any remaining child processes to terminate */
967
do{
1241
do {
968
1242
ret = wait(NULL);
969
1243
} while(ret >= 0);
970
1244
if(errno != ECHILD){
971
1245
perror("wait");
972
1246
}
973
1247
1248
free_plugin_list();
1249
1250
free(plugindir);
1251
free(argfile);
1252
974
1253
return exitstatus;
975
1254
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0