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 91
- compare with another revision
- download diff
- download tarball
- view history from revision 91
- Committer: Teddy Hogeborn
- Date: 2008-08-19 23:44:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20080819234417-8dz5prw19ihrklx6
* Makefile (DOCBOOKTOMAN): Include all DocBook-to-manpage-related
commands here, and use it everywhere.
(mandos.8, mandos.conf.5): New; also depend on "mandos-options.xml".
* mandos-keygen.xml: Removed OVERVIEW entity. Add XInclude namespace.
(OVERVIEW): Changed to do <xi:include/>.
* mandos-options.xml (<simplesect>): Changed to a <section>.
([@id="address"]): Reordered sentences.
* mandos.conf.xml (OPTIONS): Removed illegal <arg> tags.
(EXAMPLE): Added empty example.
* mandos.xml (NETWORK PROTOCOL): Bug fix: Changed "1\r\en" back to
"1\r\n".
(CHECKING): Do not refer to the non-relevant mandos.conf(5) manual.
commands here, and use it everywhere.
(mandos.8, mandos.conf.5): New; also depend on "mandos-options.xml".
* mandos-keygen.xml: Removed OVERVIEW entity. Add XInclude namespace.
(OVERVIEW): Changed to do <xi:include/>.
* mandos-options.xml (<simplesect>): Changed to a <section>.
([@id="address"]): Reordered sentences.
* mandos.conf.xml (OPTIONS): Removed illegal <arg> tags.
(EXAMPLE): Added empty example.
* mandos.xml (NETWORK PROTOCOL): Bug fix: Changed "1\r\en" back to
"1\r\n".
(CHECKING): Do not refer to the non-relevant mandos.conf(5) manual.
- 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,
61
58
argp_parse(), ARGP_ERR_UNKNOWN,
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
64
60
#include <signal.h> /* struct sigaction, sigemptyset(),
65
61
sigaddset(), sigaction(),
66
62
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
63
SIG_UNBLOCK, kill() */
69
64
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
72
65
73
66
#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;
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
69
const char *argp_program_version = "plugin-runner 1.0";
79
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
80
71
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
81
86
typedef struct plugin{
82
87
char *name; /* can be NULL or any plugin name */
83
88
char **argv;
85
90
char **environ;
86
91
int envc;
87
92
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
93
struct plugin *next;
99
94
} plugin;
100
95
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))){
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))){
110
100
return p;
111
101
}
112
102
}
113
103
/* 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){
119
return NULL;
120
}
121
char *copy_name = NULL;
122
if(name != NULL){
123
do {
124
copy_name = strdup(name);
125
} while(copy_name == NULL and errno == EINTR);
126
if(copy_name == NULL){
127
int e = errno;
128
free(new_plugin);
129
errno = e;
130
return NULL;
131
}
132
}
133
134
*new_plugin = (plugin){ .name = copy_name,
135
.argc = 1,
136
.disabled = false,
137
.next = plugin_list };
138
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;
144
free(copy_name);
104
plugin *new_plugin = malloc(sizeof(plugin));
105
if (new_plugin == NULL){
106
return NULL;
107
}
108
char *copy_name = strdup(name);
109
if(copy_name == NULL){
110
return NULL;
111
}
112
113
*new_plugin = (plugin) { .name = copy_name,
114
.argc = 1,
115
.envc = 0,
116
.disabled = false,
117
.next = *plugin_list };
118
119
new_plugin->argv = malloc(sizeof(char *) * 2);
120
if (new_plugin->argv == NULL){
145
121
free(new_plugin);
146
errno = e;
147
122
return NULL;
148
123
}
149
124
new_plugin->argv[0] = copy_name;
150
125
new_plugin->argv[1] = NULL;
151
152
do {
153
new_plugin->environ = malloc(sizeof(char *));
154
} while(new_plugin->environ == NULL and errno == EINTR);
126
127
new_plugin->environ = malloc(sizeof(char *));
155
128
if(new_plugin->environ == NULL){
156
int e = errno;
157
free(copy_name);
158
129
free(new_plugin->argv);
159
130
free(new_plugin);
160
errno = e;
161
131
return NULL;
162
132
}
163
133
new_plugin->environ[0] = NULL;
164
165
134
/* Append the new plugin to the list */
166
plugin_list = new_plugin;
135
*plugin_list = new_plugin;
167
136
return new_plugin;
168
137
}
169
138
171
140
static bool add_to_char_array(const char *new, char ***array,
172
141
int *len){
173
142
/* 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);
143
*array = realloc(*array, sizeof(char *)
144
* (size_t) ((*len) + 2));
178
145
/* Malloc check */
179
146
if(*array == NULL){
180
147
return false;
181
148
}
182
149
/* Make a copy of the new string */
183
char *copy;
184
do {
185
copy = strdup(new);
186
} while(copy == NULL and errno == EINTR);
150
char *copy = strdup(new);
187
151
if(copy == NULL){
188
152
return false;
189
153
}
204
168
}
205
169
206
170
/* Add to a plugin's environment */
207
static bool add_environment(plugin *p, const char *def, bool replace){
171
static bool add_environment(plugin *p, const char *def){
208
172
if(p == NULL){
209
173
return false;
210
174
}
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
175
return add_to_char_array(def, &(p->environ), &(p->envc));
232
176
}
233
177
178
234
179
/*
235
180
* Based on the example in the GNU LibC manual chapter 13.13 "File
236
181
* Descriptor Flags".
237
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
182
* *Note File Descriptor Flags:(libc)Descriptor Flags.
238
183
*/
239
static int set_cloexec_flag(int fd){
240
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
184
static int set_cloexec_flag(int fd)
185
{
186
int ret = fcntl(fd, F_GETFD, 0);
241
187
/* If reading the flags failed, return error indication now. */
242
188
if(ret < 0){
243
189
return ret;
244
190
}
245
191
/* Store modified flag word in the descriptor. */
246
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
247
ret | FD_CLOEXEC));
192
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
248
193
}
249
194
195
process *process_list = NULL;
250
196
251
/* Mark processes as completed when they exit, and save their exit
197
/* Mark a process as completed when it exits, and save its exit
252
198
status. */
253
static void handle_sigchld(__attribute__((unused)) int sig){
254
int old_errno = errno;
255
while(true){
256
plugin *proc = plugin_list;
257
int status;
258
pid_t pid = waitpid(-1, &status, WNOHANG);
259
if(pid == 0){
260
/* Only still running child processes */
261
break;
262
}
263
if(pid == -1){
264
if(errno == ECHILD){
265
/* No child processes */
266
break;
267
}
268
perror("waitpid");
269
}
270
271
/* A child exited, find it in process_list */
272
while(proc != NULL and proc->pid != pid){
273
proc = proc->next;
274
}
275
if(proc == NULL){
276
/* Process not found in process list */
277
continue;
278
}
279
proc->status = status;
280
proc->completed = 1;
281
}
282
errno = old_errno;
199
void handle_sigchld(__attribute__((unused)) int sig){
200
process *proc = process_list;
201
int status;
202
pid_t pid = wait(&status);
203
if(pid == -1){
204
perror("wait");
205
return;
206
}
207
while(proc != NULL and proc->pid != pid){
208
proc = proc->next;
209
}
210
if(proc == NULL){
211
/* Process not found in process list */
212
return;
213
}
214
proc->status = status;
215
proc->completed = true;
283
216
}
284
217
285
/* Prints out a password to stdout */
286
static bool print_out_password(const char *buffer, size_t length){
218
bool print_out_password(const char *buffer, size_t length){
287
219
ssize_t ret;
220
if(length>0 and buffer[length-1] == '\n'){
221
length--;
222
}
288
223
for(size_t written = 0; written < length; written += (size_t)ret){
289
224
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
290
225
length - written));
295
230
return true;
296
231
}
297
232
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
}
233
char **add_to_argv(char **argv, int *argc, char *arg){
234
if (argv == NULL){
235
*argc = 1;
236
argv = malloc(sizeof(char*) * 2);
237
if(argv == NULL){
238
return NULL;
322
239
}
323
}
324
325
free(plugin_node);
240
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
241
argv[1] = NULL;
242
}
243
*argc += 1;
244
argv = realloc(argv, sizeof(char *)
245
* ((unsigned int) *argc + 1));
246
if(argv == NULL){
247
return NULL;
248
}
249
argv[*argc-1] = arg;
250
argv[*argc] = NULL;
251
return argv;
326
252
}
327
253
328
static void free_plugin_list(void){
329
while(plugin_list != NULL){
330
free_plugin(plugin_list);
331
}
254
static void free_plugin_list(plugin *plugin_list){
255
for(plugin *next = plugin_list; plugin_list != NULL; plugin_list = next){
256
next = plugin_list->next;
257
free(plugin_list->name);
258
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
259
free(*arg);
260
}
261
free(plugin_list->argv);
262
for(char **env = plugin_list->environ; *env != NULL; env++){
263
free(*env);
264
}
265
free(plugin_list->environ);
266
free(plugin_list);
267
}
332
268
}
333
269
334
270
int main(int argc, char *argv[]){
335
char *plugindir = NULL;
336
char *argfile = NULL;
271
const char *plugindir = "/lib/mandos/plugins.d";
272
const char *argfile = ARGFILE;
337
273
FILE *conffp;
338
274
size_t d_name_len;
339
275
DIR *dir = NULL;
341
277
struct stat st;
342
278
fd_set rfds_all;
343
279
int ret, maxfd = 0;
344
ssize_t sret;
345
280
uid_t uid = 65534;
346
281
gid_t gid = 65534;
347
282
bool debug = false;
363
298
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
364
299
if(ret == -1){
365
300
perror("sigaction");
366
exitstatus = EXIT_FAILURE;
301
exitstatus = EXIT_FAILURE;
367
302
goto fallback;
368
303
}
369
304
372
307
{ .name = "global-options", .key = 'g',
373
308
.arg = "OPTION[,OPTION[,...]]",
374
309
.doc = "Options passed to all plugins" },
375
{ .name = "global-env", .key = 'G',
310
{ .name = "global-envs", .key = 'e',
376
311
.arg = "VAR=value",
377
312
.doc = "Environment variable passed to all plugins" },
378
313
{ .name = "options-for", .key = 'o',
379
314
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
380
315
.doc = "Options passed only to specified plugin" },
381
{ .name = "env-for", .key = 'E',
316
{ .name = "envs-for", .key = 'f',
382
317
.arg = "PLUGIN:ENV=value",
383
318
.doc = "Environment variable passed to specified plugin" },
384
319
{ .name = "disable", .key = 'd',
385
320
.arg = "PLUGIN",
386
321
.doc = "Disable a specific plugin", .group = 1 },
387
{ .name = "enable", .key = 'e',
388
.arg = "PLUGIN",
389
.doc = "Enable a specific plugin", .group = 1 },
390
322
{ .name = "plugin-dir", .key = 128,
391
323
.arg = "DIRECTORY",
392
324
.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 },
325
{ .name = "userid", .key = 129,
326
.arg = "ID", .flags = 0,
327
.doc = "User ID the plugins will run as", .group = 2 },
328
{ .name = "groupid", .key = 130,
329
.arg = "ID", .flags = 0,
330
.doc = "Group ID the plugins will run as", .group = 2 },
331
{ .name = "debug", .key = 131,
332
.doc = "Debug mode", .group = 3 },
413
333
{ .name = NULL }
414
334
};
415
335
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 */
336
error_t parse_opt (int key, char *arg, struct argp_state *state) {
337
/* Get the INPUT argument from `argp_parse', which we know is a
338
pointer to our plugin list pointer. */
339
plugin **plugins = state->input;
340
switch (key) {
341
case 'g':
342
if (arg != NULL){
343
char *p;
344
while((p = strsep(&arg, ",")) != NULL){
345
if(p[0] == '\0'){
346
continue;
347
}
348
if(not add_argument(getplugin(NULL, plugins), p)){
349
perror("add_argument");
350
return ARGP_ERR_UNKNOWN;
351
}
352
}
353
}
354
break;
355
case 'e':
356
if(arg == NULL){
357
break;
358
}
359
{
360
char *envdef = strdup(arg);
361
if(envdef == NULL){
362
break;
363
}
364
if(not add_environment(getplugin(NULL, plugins), envdef)){
365
perror("add_environment");
366
}
367
}
368
break;
369
case 'o':
370
if (arg != NULL){
371
char *p_name = strsep(&arg, ":");
372
if(p_name[0] == '\0'){
373
break;
374
}
375
char *opt = strsep(&arg, ":");
376
if(opt[0] == '\0'){
377
break;
378
}
379
if(opt != NULL){
380
char *p;
381
while((p = strsep(&opt, ",")) != NULL){
382
if(p[0] == '\0'){
383
continue;
384
}
385
if(not add_argument(getplugin(p_name, plugins), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
388
}
389
}
390
}
391
}
392
break;
393
case 'f':
394
if(arg == NULL){
395
break;
396
}
458
397
{
459
398
char *envdef = strchr(arg, ':');
460
399
if(envdef == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*envdef = '\0';
400
break;
401
}
402
char *p_name = strndup(arg, (size_t) (envdef-arg));
403
if(p_name == NULL){
404
break;
405
}
466
406
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 */
407
if(not add_environment(getplugin(p_name, plugins), envdef)){
408
perror("add_environment");
409
}
410
}
411
break;
412
case 'd':
413
if (arg != NULL){
414
plugin *p = getplugin(arg, plugins);
415
if(p == NULL){
416
return ARGP_ERR_UNKNOWN;
417
}
418
p->disabled = true;
419
}
420
break;
421
case 128:
422
plugindir = arg;
423
break;
424
case 129:
425
uid = (uid_t)strtol(arg, NULL, 10);
426
break;
427
case 130:
428
gid = (gid_t)strtol(arg, NULL, 10);
429
break;
430
case 131:
519
431
debug = true;
520
432
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 = "",
433
case ARGP_KEY_ARG:
434
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
435
break;
436
case ARGP_KEY_END:
437
break;
438
default:
439
return ARGP_ERR_UNKNOWN;
440
}
441
return 0;
442
}
443
444
plugin *plugin_list = NULL;
445
446
struct argp argp = { .options = options, .parser = parse_opt,
447
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
588
448
.doc = "Mandos plugin runner -- Run plugins" };
589
449
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
}
450
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
451
if (ret == ARGP_ERR_UNKNOWN){
452
fprintf(stderr, "Unknown error while parsing arguments\n");
453
exitstatus = EXIT_FAILURE;
454
goto fallback;
455
}
456
457
conffp = fopen(argfile, "r");
618
458
if(conffp != NULL){
619
459
char *org_line = NULL;
620
460
char *p, *arg, *new_arg, *line;
621
461
size_t size = 0;
462
ssize_t sret;
622
463
const char whitespace_delims[] = " \r\t\f\v\n";
623
464
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 */
465
637
466
while(true){
638
467
sret = getline(&org_line, &size, conffp);
639
468
if(sret == -1){
640
469
break;
641
470
}
642
471
643
472
line = org_line;
644
473
arg = strsep(&line, comment_delim);
645
474
while((p = strsep(&arg, whitespace_delims)) != NULL){
647
476
continue;
648
477
}
649
478
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;
479
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
480
if (custom_argv == NULL){
481
perror("add_to_argv");
482
exitstatus = EXIT_FAILURE;
483
goto fallback;
484
}
668
485
}
669
486
}
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
487
free(org_line);
679
} else {
488
} else{
680
489
/* Check for harmful errors and go to fallback. Other errors might
681
490
not affect opening plugins */
682
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
491
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
683
492
perror("fopen");
684
493
exitstatus = EXIT_FAILURE;
685
494
goto fallback;
686
495
}
687
496
}
688
/* If there were any arguments from the configuration file, pass
689
them to parser as command line arguments */
497
690
498
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;
499
custom_argv[0] = argv[0];
500
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
501
if (ret == ARGP_ERR_UNKNOWN){
502
fprintf(stderr, "Unknown error while parsing arguments\n");
503
exitstatus = EXIT_FAILURE;
705
504
goto fallback;
706
505
}
707
506
}
708
507
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
508
if(debug){
729
509
for(plugin *p = plugin_list; p != NULL; p=p->next){
730
510
fprintf(stderr, "Plugin: %s has %d arguments\n",
732
512
for(char **a = p->argv; *a != NULL; a++){
733
513
fprintf(stderr, "\tArg: %s\n", *a);
734
514
}
735
fprintf(stderr, "...and %d environment variables\n", p->envc);
515
fprintf(stderr, "...and %u environment variables\n", p->envc);
736
516
for(char **a = p->environ; *a != NULL; a++){
737
517
fprintf(stderr, "\t%s\n", *a);
738
518
}
739
519
}
740
520
}
741
521
742
/* Strip permissions down to nobody */
522
ret = setuid(uid);
523
if (ret == -1){
524
perror("setuid");
525
}
526
743
527
setgid(gid);
744
if(ret == -1){
528
if (ret == -1){
745
529
perror("setgid");
746
530
}
747
ret = setuid(uid);
748
if(ret == -1){
749
perror("setuid");
531
532
dir = opendir(plugindir);
533
if(dir == NULL){
534
perror("Could not open plugin dir");
535
exitstatus = EXIT_FAILURE;
536
goto fallback;
750
537
}
751
538
752
/* Open plugin directory with close_on_exec flag */
539
/* Set the FD_CLOEXEC flag on the directory, if possible */
753
540
{
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;
541
int dir_fd = dirfd(dir);
542
if(dir_fd >= 0){
543
ret = set_cloexec_flag(dir_fd);
544
if(ret < 0){
545
perror("set_cloexec_flag");
546
exitstatus = EXIT_FAILURE;
547
goto fallback;
548
}
795
549
}
796
550
}
797
551
798
552
FD_ZERO(&rfds_all);
799
553
800
/* Read and execute any executable in the plugin directory*/
801
554
while(true){
802
do {
803
dirst = readdir(dir);
804
} while(dirst == NULL and errno == EINTR);
555
dirst = readdir(dir);
805
556
806
/* All directory entries have been processed */
557
// All directory entries have been processed
807
558
if(dirst == NULL){
808
if(errno == EBADF){
559
if (errno == EBADF){
809
560
perror("readdir");
810
561
exitstatus = EXIT_FAILURE;
811
562
goto fallback;
815
566
816
567
d_name_len = strlen(dirst->d_name);
817
568
818
/* Ignore dotfiles, backup files and other junk */
569
// Ignore dotfiles, backup files and other junk
819
570
{
820
571
bool bad_name = false;
821
572
823
574
824
575
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
825
576
".dpkg-old",
826
".dpkg-bak",
827
577
".dpkg-divert", NULL };
828
578
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
829
579
size_t pre_len = strlen(*pre);
837
587
break;
838
588
}
839
589
}
590
840
591
if(bad_name){
841
592
continue;
842
593
}
594
843
595
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
844
596
size_t suf_len = strlen(*suf);
845
597
if((d_name_len >= suf_len)
858
610
continue;
859
611
}
860
612
}
861
613
862
614
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
}
615
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
871
616
if(ret < 0){
872
617
perror("asprintf");
873
618
continue;
874
619
}
875
620
876
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
877
if(ret == -1){
621
ret = stat(filename, &st);
622
if (ret == -1){
878
623
perror("stat");
879
624
free(filename);
880
625
continue;
881
626
}
882
627
883
/* Ignore non-executable files */
884
if(not S_ISREG(st.st_mode)
885
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
628
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
886
629
if(debug){
887
630
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
888
631
" with bad type or mode\n", filename);
890
633
free(filename);
891
634
continue;
892
635
}
893
894
plugin *p = getplugin(dirst->d_name);
636
plugin *p = getplugin(dirst->d_name, &plugin_list);
895
637
if(p == NULL){
896
638
perror("getplugin");
897
639
free(filename);
907
649
}
908
650
{
909
651
/* Add global arguments to argument list for this plugin */
910
plugin *g = getplugin(NULL);
652
plugin *g = getplugin(NULL, &plugin_list);
911
653
if(g != NULL){
912
654
for(char **a = g->argv + 1; *a != NULL; a++){
913
655
if(not add_argument(p, *a)){
916
658
}
917
659
/* Add global environment variables */
918
660
for(char **e = g->environ; *e != NULL; e++){
919
if(not add_environment(p, *e, false)){
661
if(not add_environment(p, *e)){
920
662
perror("add_environment");
921
663
}
922
664
}
927
669
process, too. */
928
670
if(p->environ[0] != NULL){
929
671
for(char **e = environ; *e != NULL; e++){
930
if(not add_environment(p, *e, false)){
672
char *copy = strdup(*e);
673
if(copy == NULL){
674
perror("strdup");
675
continue;
676
}
677
if(not add_environment(p, copy)){
931
678
perror("add_environment");
932
679
}
933
680
}
934
681
}
935
682
936
int pipefd[2];
937
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
938
if(ret == -1){
683
int pipefd[2];
684
ret = pipe(pipefd);
685
if (ret == -1){
939
686
perror("pipe");
940
687
exitstatus = EXIT_FAILURE;
941
688
goto fallback;
942
689
}
943
/* Ask OS to automatic close the pipe on exec */
944
690
ret = set_cloexec_flag(pipefd[0]);
945
691
if(ret < 0){
946
692
perror("set_cloexec_flag");
954
700
goto fallback;
955
701
}
956
702
/* 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));
703
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
960
704
if(ret < 0){
961
705
perror("sigprocmask");
962
706
exitstatus = EXIT_FAILURE;
963
707
goto fallback;
964
708
}
965
/* Starting a new process to be watched */
966
pid_t pid;
967
do {
968
pid = fork();
969
} while(pid == -1 and errno == EINTR);
709
// Starting a new process to be watched
710
pid_t pid = fork();
970
711
if(pid == -1){
971
712
perror("fork");
972
713
exitstatus = EXIT_FAILURE;
979
720
perror("sigaction");
980
721
_exit(EXIT_FAILURE);
981
722
}
982
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
723
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
983
724
if(ret < 0){
984
725
perror("sigprocmask");
985
726
_exit(EXIT_FAILURE);
986
727
}
987
728
988
729
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
989
730
if(ret == -1){
990
731
perror("dup2");
1009
750
}
1010
751
/* no return */
1011
752
}
1012
/* Parent process */
1013
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1014
pipe */
753
/* parent process */
1015
754
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)));
755
close(pipefd[1]); /* close unused write end of pipe */
756
process *new_process = malloc(sizeof(process));
757
if (new_process == NULL){
758
perror("malloc");
759
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1022
760
if(ret < 0){
1023
perror("sigprocmask");
761
perror("sigprocmask");
1024
762
}
1025
763
exitstatus = EXIT_FAILURE;
1026
764
goto fallback;
1027
765
}
1028
766
1029
new_plugin->pid = pid;
1030
new_plugin->fd = pipefd[0];
1031
767
*new_process = (struct process){ .pid = pid,
768
.fd = pipefd[0],
769
.next = process_list };
770
// List handling
771
process_list = new_process;
1032
772
/* Unblock SIGCHLD so signal handler can be run if this process
1033
773
has already completed */
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1035
&sigchld_action.sa_mask,
1036
NULL));
774
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
775
if(ret < 0){
1038
776
perror("sigprocmask");
1039
777
exitstatus = EXIT_FAILURE;
1040
778
goto fallback;
1041
779
}
1042
780
1043
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1044
-Wconversion */
781
FD_SET(new_process->fd, &rfds_all);
1045
782
1046
if(maxfd < new_plugin->fd){
1047
maxfd = new_plugin->fd;
783
if (maxfd < new_process->fd){
784
maxfd = new_process->fd;
1048
785
}
786
1049
787
}
1050
788
1051
TEMP_FAILURE_RETRY(closedir(dir));
789
free_plugin_list(plugin_list);
790
791
closedir(dir);
1052
792
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
}
793
794
if (process_list == NULL){
795
fprintf(stderr, "No plugin processes started. Incorrect plugin"
796
" directory?\n");
797
process_list = NULL;
1064
798
}
1065
1066
/* Main loop while running plugins exist */
1067
while(plugin_list){
799
while(process_list){
1068
800
fd_set rfds = rfds_all;
1069
801
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1070
if(select_ret == -1 and errno != EINTR){
802
if (select_ret == -1){
1071
803
perror("select");
1072
804
exitstatus = EXIT_FAILURE;
1073
805
goto fallback;
1074
806
}
1075
807
/* OK, now either a process completed, or something can be read
1076
808
from one of them */
1077
for(plugin *proc = plugin_list; proc != NULL;){
809
for(process *proc = process_list; proc ; proc = proc->next){
1078
810
/* Is this process completely done? */
1079
if(proc->completed and proc->eof){
811
if(proc->eof and proc->completed){
1080
812
/* Only accept the plugin output if it exited cleanly */
1081
813
if(not WIFEXITED(proc->status)
1082
814
or WEXITSTATUS(proc->status) != 0){
1083
815
/* Bad exit by plugin */
1084
1085
816
if(debug){
1086
817
if(WIFEXITED(proc->status)){
1087
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1088
" status %d\n", proc->name,
1089
(intmax_t) (proc->pid),
818
fprintf(stderr, "Plugin %u exited with status %d\n",
819
(unsigned int) (proc->pid),
1090
820
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)));
821
} else if(WIFSIGNALED(proc->status)) {
822
fprintf(stderr, "Plugin %u killed by signal %d\n",
823
(unsigned int) (proc->pid),
824
WTERMSIG(proc->status));
1097
825
} else if(WCOREDUMP(proc->status)){
1098
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1099
" core\n", proc->name, (intmax_t) (proc->pid));
826
fprintf(stderr, "Plugin %d dumped core\n",
827
(unsigned int) (proc->pid));
1100
828
}
1101
829
}
1102
1103
830
/* Remove the plugin */
1104
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion */
1106
831
FD_CLR(proc->fd, &rfds_all);
1107
832
/* Block signal while modifying process_list */
1108
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1109
(SIG_BLOCK,
1110
&sigchld_action.sa_mask,
1111
NULL));
833
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1112
834
if(ret < 0){
1113
835
perror("sigprocmask");
1114
836
exitstatus = EXIT_FAILURE;
1115
837
goto fallback;
1116
838
}
1117
1118
plugin *next_plugin = proc->next;
1119
free_plugin(proc);
1120
proc = next_plugin;
1121
839
/* Delete this process entry from the list */
840
if(process_list == proc){
841
/* First one - simple */
842
process_list = proc->next;
843
} else {
844
/* Second one or later */
845
for(process *p = process_list; p != NULL; p = p->next){
846
if(p->next == proc){
847
p->next = proc->next;
848
break;
849
}
850
}
851
}
1122
852
/* 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)));
853
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
854
NULL);
1126
855
if(ret < 0){
1127
856
perror("sigprocmask");
1128
exitstatus = EXIT_FAILURE;
1129
goto fallback;
1130
}
1131
1132
if(plugin_list == NULL){
1133
break;
1134
}
1135
1136
continue;
857
}
858
free(proc->buffer);
859
free(proc);
860
/* We deleted this process from the list, so we can't go
861
proc->next. Therefore, start over from the beginning of
862
the process list */
863
break;
1137
864
}
1138
1139
865
/* This process exited nicely, so print its buffer */
1140
1141
bool bret = print_out_password(proc->buffer,
1142
proc->buffer_length);
866
867
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1143
868
if(not bret){
1144
869
perror("print_out_password");
1145
870
exitstatus = EXIT_FAILURE;
1146
871
}
1147
872
goto fallback;
1148
873
}
1149
1150
874
/* 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 */
875
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1154
876
/* This process had nothing to say at this time */
1155
proc = proc->next;
1156
877
continue;
1157
878
}
1158
879
/* Before reading, make the process' data buffer large enough */
1159
880
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1160
881
proc->buffer = realloc(proc->buffer, proc->buffer_size
1161
882
+ (size_t) BUFFER_SIZE);
1162
if(proc->buffer == NULL){
883
if (proc->buffer == NULL){
1163
884
perror("malloc");
1164
885
exitstatus = EXIT_FAILURE;
1165
886
goto fallback;
1167
888
proc->buffer_size += BUFFER_SIZE;
1168
889
}
1169
890
/* 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){
891
ret = read(proc->fd, proc->buffer + proc->buffer_length,
892
BUFFER_SIZE);
893
if(ret < 0){
1175
894
/* Read error from this process; ignore the error */
1176
proc = proc->next;
1177
895
continue;
1178
896
}
1179
if(sret == 0){
897
if(ret == 0){
1180
898
/* got EOF */
1181
899
proc->eof = true;
1182
900
} else {
1183
proc->buffer_length += (size_t) sret;
901
proc->buffer_length += (size_t) ret;
1184
902
}
1185
903
}
1186
904
}
1187
1188
905
906
1189
907
fallback:
1190
908
1191
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1192
/* Fallback if all plugins failed, none are found or an error
1193
occured */
909
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
910
/* Fallback if all plugins failed, none are found or an error occured */
1194
911
bool bret;
1195
912
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1196
913
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);
914
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1204
915
if(not bret){
1205
916
perror("print_out_password");
1206
917
exitstatus = EXIT_FAILURE;
1213
924
perror("sigaction");
1214
925
exitstatus = EXIT_FAILURE;
1215
926
}
1216
927
1217
928
if(custom_argv != NULL){
1218
for(char **arg = custom_argv+1; *arg != NULL; arg++){
929
for(char **arg = custom_argv; *arg != NULL; arg++){
1219
930
free(*arg);
1220
931
}
1221
932
free(custom_argv);
1222
933
}
934
free_plugin_list(plugin_list);
1223
935
1224
936
if(dir != NULL){
1225
937
closedir(dir);
1226
938
}
1227
939
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
}
940
/* Free the process list and kill the processes */
941
for(process *next; process_list != NULL; process_list = next){
942
next = process_list->next;
943
close(process_list->fd);
944
ret = kill(process_list->pid, SIGTERM);
945
if(ret == -1 and errno != ESRCH){
946
/* set-uid proccesses migth not get closed */
947
perror("kill");
1237
948
}
949
free(process_list->buffer);
950
free(process_list);
1238
951
}
1239
952
1240
953
/* Wait for any remaining child processes to terminate */
1241
do {
954
do{
1242
955
ret = wait(NULL);
1243
956
} while(ret >= 0);
1244
957
if(errno != ECHILD){
1245
958
perror("wait");
1246
959
}
1247
960
1248
free_plugin_list();
1249
1250
free(plugindir);
1251
free(argfile);
1252
1253
961
return exitstatus;
1254
962
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0