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- Committer: Teddy Hogeborn
- Date: 2014-03-10 07:04:09 UTC
- Revision ID: teddy@recompile.se-20140310070409-ho6p1wrnpopi2ny1
White space fix: change "if (" to "if(" in C code.
* plugins.d/askpass-fifo.c (error_plus): White space fix.
* plugins.d/password-prompt.c (error_plus, conflict_detection,
main): - '' -
* plugins.d/plymouth.c (error_plus, exec_and_wait, get_pid): - '' -
* plugins.d/splashy.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
* plugins.d/askpass-fifo.c (error_plus): White space fix.
* plugins.d/password-prompt.c (error_plus, conflict_detection,
main): - '' -
* plugins.d/plymouth.c (error_plus, exec_and_wait, get_pid): - '' -
* plugins.d/splashy.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- 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 © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 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
18
19
* along with this program. If not, see
19
20
* <http://www.gnu.org/licenses/>.
20
21
*
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
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
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
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> /* 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(), strcmp(), strncmp() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
61
64
#include <signal.h> /* struct sigaction, sigemptyset(),
62
65
sigaddset(), sigaction(),
63
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
66
75
67
76
#define BUFFER_SIZE 256
68
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
70
const char *argp_program_version = "plugin-runner 1.0";
71
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
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;
77
78
#define PDIR "/lib/mandos/plugins.d"
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
86
83
87
84
typedef struct plugin{
88
85
char *name; /* can be NULL or any plugin name */
91
88
char **environ;
92
89
int envc;
93
90
bool disabled;
91
92
/* Variables used for running processes*/
93
pid_t pid;
94
int fd;
95
char *buffer;
96
size_t buffer_size;
97
size_t buffer_length;
98
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
94
101
struct plugin *next;
95
102
} plugin;
96
103
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))){
104
static plugin *plugin_list = NULL;
105
106
/* Gets an existing plugin based on name,
107
or if none is found, creates a new one */
108
static plugin *getplugin(char *name){
109
/* Check for existing plugin with that name */
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
111
if((p->name == name)
112
or (p->name and name and (strcmp(p->name, name) == 0))){
101
113
return p;
102
114
}
103
115
}
104
116
/* Create a new plugin */
105
plugin *new_plugin = malloc(sizeof(plugin));
106
if (new_plugin == NULL){
117
plugin *new_plugin = NULL;
118
do {
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
121
if(new_plugin == NULL){
107
122
return NULL;
108
123
}
109
124
char *copy_name = NULL;
110
125
if(name != NULL){
111
copy_name = strdup(name);
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
112
129
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
113
133
return NULL;
114
134
}
115
135
}
116
136
117
*new_plugin = (plugin) { .name = copy_name,
118
.argc = 1,
119
.envc = 0,
120
.disabled = false,
121
.next = *plugin_list };
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
122
141
123
new_plugin->argv = malloc(sizeof(char *) * 2);
124
if (new_plugin->argv == NULL){
142
do {
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
145
if(new_plugin->argv == NULL){
146
int e = errno;
125
147
free(copy_name);
126
148
free(new_plugin);
149
errno = e;
127
150
return NULL;
128
151
}
129
152
new_plugin->argv[0] = copy_name;
130
153
new_plugin->argv[1] = NULL;
131
132
new_plugin->environ = malloc(sizeof(char *));
154
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
133
158
if(new_plugin->environ == NULL){
159
int e = errno;
134
160
free(copy_name);
135
161
free(new_plugin->argv);
136
162
free(new_plugin);
163
errno = e;
137
164
return NULL;
138
165
}
139
166
new_plugin->environ[0] = NULL;
167
140
168
/* Append the new plugin to the list */
141
*plugin_list = new_plugin;
169
plugin_list = new_plugin;
142
170
return new_plugin;
143
171
}
144
172
145
173
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
146
175
static bool add_to_char_array(const char *new, char ***array,
147
176
int *len){
148
177
/* Resize the pointed-to array to hold one more pointer */
149
*array = realloc(*array, sizeof(char *)
150
* (size_t) ((*len) + 2));
178
char **new_array = NULL;
179
do {
180
new_array = realloc(*array, sizeof(char *)
181
* (size_t) ((*len) + 2));
182
} while(new_array == NULL and errno == EINTR);
151
183
/* Malloc check */
152
if(*array == NULL){
184
if(new_array == NULL){
153
185
return false;
154
186
}
187
*array = new_array;
155
188
/* Make a copy of the new string */
156
char *copy = strdup(new);
189
char *copy;
190
do {
191
copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
157
193
if(copy == NULL){
158
194
return false;
159
195
}
166
202
}
167
203
168
204
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
169
206
static bool add_argument(plugin *p, const char *arg){
170
207
if(p == NULL){
171
208
return false;
174
211
}
175
212
176
213
/* Add to a plugin's environment */
177
static bool add_environment(plugin *p, const char *def){
214
__attribute__((nonnull(2)))
215
static bool add_environment(plugin *p, const char *def, bool replace){
178
216
if(p == NULL){
179
217
return false;
180
218
}
219
/* namelen = length of name of environment variable */
220
size_t namelen = (size_t)(strchrnul(def, '=') - def);
221
/* Search for this environment variable */
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
224
/* It already exists */
225
if(replace){
226
char *new_envdef;
227
do {
228
new_envdef = realloc(*envdef, strlen(def) + 1);
229
} while(new_envdef == NULL and errno == EINTR);
230
if(new_envdef == NULL){
231
return false;
232
}
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
235
}
236
return true;
237
}
238
}
181
239
return add_to_char_array(def, &(p->environ), &(p->envc));
182
240
}
183
241
184
185
242
/*
186
243
* Based on the example in the GNU LibC manual chapter 13.13 "File
187
244
* Descriptor Flags".
188
* *Note File Descriptor Flags:(libc)Descriptor Flags.
245
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
189
246
*/
190
static int set_cloexec_flag(int fd)
191
{
192
int ret = fcntl(fd, F_GETFD, 0);
247
static int set_cloexec_flag(int fd){
248
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
193
249
/* If reading the flags failed, return error indication now. */
194
250
if(ret < 0){
195
251
return ret;
196
252
}
197
253
/* Store modified flag word in the descriptor. */
198
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
254
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
255
ret | FD_CLOEXEC));
199
256
}
200
257
201
process *process_list = NULL;
202
258
203
259
/* Mark processes as completed when they exit, and save their exit
204
260
status. */
205
void handle_sigchld(__attribute__((unused)) int sig){
261
static void handle_sigchld(__attribute__((unused)) int sig){
262
int old_errno = errno;
206
263
while(true){
207
process *proc = process_list;
264
plugin *proc = plugin_list;
208
265
int status;
209
266
pid_t pid = waitpid(-1, &status, WNOHANG);
210
267
if(pid == 0){
212
269
break;
213
270
}
214
271
if(pid == -1){
215
if (errno != ECHILD){
216
perror("waitpid");
272
if(errno == ECHILD){
273
/* No child processes */
274
break;
217
275
}
218
/* No child processes */
219
break;
276
error(0, errno, "waitpid");
220
277
}
221
278
222
279
/* A child exited, find it in process_list */
223
280
while(proc != NULL and proc->pid != pid){
224
281
proc = proc->next;
228
285
continue;
229
286
}
230
287
proc->status = status;
231
proc->completed = true;
288
proc->completed = 1;
232
289
}
290
errno = old_errno;
233
291
}
234
292
235
bool print_out_password(const char *buffer, size_t length){
293
/* Prints out a password to stdout */
294
__attribute__((nonnull))
295
static bool print_out_password(const char *buffer, size_t length){
236
296
ssize_t ret;
237
if(length>0 and buffer[length-1] == '\n'){
238
length--;
239
}
240
297
for(size_t written = 0; written < length; written += (size_t)ret){
241
298
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
242
299
length - written));
247
304
return true;
248
305
}
249
306
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;
307
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
309
static void free_plugin(plugin *plugin_node){
310
311
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
312
free(*arg);
313
}
314
free(plugin_node->argv);
315
for(char **env = plugin_node->environ; *env != NULL; env++){
316
free(*env);
317
}
318
free(plugin_node->environ);
319
free(plugin_node->buffer);
320
321
/* Removes the plugin from the singly-linked list */
322
if(plugin_node == plugin_list){
323
/* First one - simple */
324
plugin_list = plugin_list->next;
325
} else {
326
/* Second one or later */
327
for(plugin *p = plugin_list; p != NULL; p = p->next){
328
if(p->next == plugin_node){
329
p->next = plugin_node->next;
330
break;
331
}
256
332
}
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;
333
}
334
335
free(plugin_node);
270
336
}
271
337
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);
338
static void free_plugin_list(void){
339
while(plugin_list != NULL){
340
free_plugin(plugin_list);
284
341
}
285
342
}
286
343
287
344
int main(int argc, char *argv[]){
288
const char *plugindir = "/lib/mandos/plugins.d";
289
const char *argfile = ARGFILE;
345
char *plugindir = NULL;
346
char *argfile = NULL;
290
347
FILE *conffp;
291
348
size_t d_name_len;
292
349
DIR *dir = NULL;
294
351
struct stat st;
295
352
fd_set rfds_all;
296
353
int ret, maxfd = 0;
354
ssize_t sret;
297
355
uid_t uid = 65534;
298
356
gid_t gid = 65534;
299
357
bool debug = false;
308
366
sigemptyset(&sigchld_action.sa_mask);
309
367
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
310
368
if(ret == -1){
311
perror("sigaddset");
312
exitstatus = EXIT_FAILURE;
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
313
371
goto fallback;
314
372
}
315
373
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
316
374
if(ret == -1){
317
perror("sigaction");
318
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
319
377
goto fallback;
320
378
}
321
379
324
382
{ .name = "global-options", .key = 'g',
325
383
.arg = "OPTION[,OPTION[,...]]",
326
384
.doc = "Options passed to all plugins" },
327
{ .name = "global-envs", .key = 'e',
385
{ .name = "global-env", .key = 'G',
328
386
.arg = "VAR=value",
329
387
.doc = "Environment variable passed to all plugins" },
330
388
{ .name = "options-for", .key = 'o',
331
389
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
332
390
.doc = "Options passed only to specified plugin" },
333
{ .name = "envs-for", .key = 'f',
391
{ .name = "env-for", .key = 'E',
334
392
.arg = "PLUGIN:ENV=value",
335
393
.doc = "Environment variable passed to specified plugin" },
336
394
{ .name = "disable", .key = 'd',
337
395
.arg = "PLUGIN",
338
396
.doc = "Disable a specific plugin", .group = 1 },
397
{ .name = "enable", .key = 'e',
398
.arg = "PLUGIN",
399
.doc = "Enable a specific plugin", .group = 1 },
339
400
{ .name = "plugin-dir", .key = 128,
340
401
.arg = "DIRECTORY",
341
402
.doc = "Specify a different plugin directory", .group = 2 },
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 },
403
{ .name = "config-file", .key = 129,
404
.arg = "FILE",
405
.doc = "Specify a different configuration file", .group = 2 },
406
{ .name = "userid", .key = 130,
407
.arg = "ID", .flags = 0,
408
.doc = "User ID the plugins will run as", .group = 3 },
409
{ .name = "groupid", .key = 131,
410
.arg = "ID", .flags = 0,
411
.doc = "Group ID the plugins will run as", .group = 3 },
412
{ .name = "debug", .key = 132,
413
.doc = "Debug mode", .group = 4 },
414
/*
415
* These reproduce what we would get without ARGP_NO_HELP
416
*/
417
{ .name = "help", .key = '?',
418
.doc = "Give this help list", .group = -1 },
419
{ .name = "usage", .key = -3,
420
.doc = "Give a short usage message", .group = -1 },
421
{ .name = "version", .key = 'V',
422
.doc = "Print program version", .group = -1 },
350
423
{ .name = NULL }
351
424
};
352
425
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
}
426
__attribute__((nonnull(3)))
427
error_t parse_opt(int key, char *arg, struct argp_state *state){
428
errno = 0;
429
switch(key){
430
char *tmp;
431
intmax_t tmp_id;
432
case 'g': /* --global-options */
433
{
434
char *plugin_option;
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
437
break;
438
}
439
}
440
}
441
break;
442
case 'G': /* --global-env */
443
add_environment(getplugin(NULL), arg, true);
444
break;
445
case 'o': /* --options-for */
446
{
447
char *option_list = strchr(arg, ':');
448
if(option_list == NULL){
449
argp_error(state, "No colon in \"%s\"", arg);
450
errno = EINVAL;
451
break;
452
}
453
*option_list = '\0';
454
option_list++;
455
if(arg[0] == '\0'){
456
argp_error(state, "Empty plugin name");
457
errno = EINVAL;
458
break;
459
}
460
char *option;
461
while((option = strsep(&option_list, ",")) != NULL){
462
if(not add_argument(getplugin(arg), option)){
463
break;
464
}
465
}
466
}
467
break;
468
case 'E': /* --env-for */
414
469
{
415
470
char *envdef = strchr(arg, ':');
416
471
if(envdef == NULL){
417
break;
418
}
419
char *p_name = strndup(arg, (size_t) (envdef-arg));
420
if(p_name == NULL){
421
break;
422
}
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
474
break;
475
}
476
*envdef = '\0';
423
477
envdef++;
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:
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
482
}
483
add_environment(getplugin(arg), envdef, true);
484
}
485
break;
486
case 'd': /* --disable */
487
{
488
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = true;
491
}
492
}
493
break;
494
case 'e': /* --enable */
495
{
496
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = false;
499
}
500
}
501
break;
502
case 128: /* --plugin-dir */
503
free(plugindir);
504
plugindir = strdup(arg);
505
break;
506
case 129: /* --config-file */
507
/* This is already done by parse_opt_config_file() */
508
break;
509
case 130: /* --userid */
510
tmp_id = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmp_id != (uid_t)tmp_id){
513
argp_error(state, "Bad user ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)uid);
515
break;
516
}
517
uid = (uid_t)tmp_id;
518
break;
519
case 131: /* --groupid */
520
tmp_id = strtoimax(arg, &tmp, 10);
521
if(errno != 0 or tmp == arg or *tmp != '\0'
522
or tmp_id != (gid_t)tmp_id){
523
argp_error(state, "Bad group ID number: \"%s\", using %"
524
PRIdMAX, arg, (intmax_t)gid);
525
break;
526
}
527
gid = (gid_t)tmp_id;
528
break;
529
case 132: /* --debug */
448
530
debug = true;
449
531
break;
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]",
532
/*
533
* These reproduce what we would get without ARGP_NO_HELP
534
*/
535
case '?': /* --help */
536
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
537
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
538
case -3: /* --usage */
539
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
540
argp_state_help(state, state->out_stream,
541
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
542
case 'V': /* --version */
543
fprintf(state->out_stream, "%s\n", argp_program_version);
544
exit(EXIT_SUCCESS);
545
break;
546
/*
547
* When adding more options before this line, remember to also add a
548
* "case" to the "parse_opt_config_file" function below.
549
*/
550
case ARGP_KEY_ARG:
551
/* Cryptsetup always passes an argument, which is an empty
552
string if "none" was specified in /etc/crypttab. So if
553
argument was empty, we ignore it silently. */
554
if(arg[0] == '\0'){
555
break;
556
}
557
default:
558
return ARGP_ERR_UNKNOWN;
559
}
560
return errno; /* Set to 0 at start */
561
}
562
563
/* This option parser is the same as parse_opt() above, except it
564
ignores everything but the --config-file option. */
565
error_t parse_opt_config_file(int key, char *arg,
566
__attribute__((unused))
567
struct argp_state *state){
568
errno = 0;
569
switch(key){
570
case 'g': /* --global-options */
571
case 'G': /* --global-env */
572
case 'o': /* --options-for */
573
case 'E': /* --env-for */
574
case 'd': /* --disable */
575
case 'e': /* --enable */
576
case 128: /* --plugin-dir */
577
break;
578
case 129: /* --config-file */
579
free(argfile);
580
argfile = strdup(arg);
581
break;
582
case 130: /* --userid */
583
case 131: /* --groupid */
584
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
588
case ARGP_KEY_ARG:
589
break;
590
default:
591
return ARGP_ERR_UNKNOWN;
592
}
593
return errno;
594
}
595
596
struct argp argp = { .options = options,
597
.parser = parse_opt_config_file,
598
.args_doc = "",
465
599
.doc = "Mandos plugin runner -- Run plugins" };
466
600
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");
601
/* Parse using parse_opt_config_file() in order to get the custom
602
config file location, if any. */
603
ret = argp_parse(&argp, argc, argv,
604
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
605
NULL, NULL);
606
switch(ret){
607
case 0:
608
break;
609
case ENOMEM:
610
default:
611
errno = ret;
612
error(0, errno, "argp_parse");
613
exitstatus = EX_OSERR;
614
goto fallback;
615
case EINVAL:
616
exitstatus = EX_USAGE;
617
goto fallback;
618
}
619
620
/* Reset to the normal argument parser */
621
argp.parser = parse_opt;
622
623
/* Open the configfile if available */
624
if(argfile == NULL){
625
conffp = fopen(AFILE, "r");
626
} else {
627
conffp = fopen(argfile, "r");
628
}
475
629
if(conffp != NULL){
476
630
char *org_line = NULL;
477
631
char *p, *arg, *new_arg, *line;
478
632
size_t size = 0;
479
ssize_t sret;
480
633
const char whitespace_delims[] = " \r\t\f\v\n";
481
634
const char comment_delim[] = "#";
482
635
636
custom_argc = 1;
637
custom_argv = malloc(sizeof(char*) * 2);
638
if(custom_argv == NULL){
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
641
goto fallback;
642
}
643
custom_argv[0] = argv[0];
644
custom_argv[1] = NULL;
645
646
/* for each line in the config file, strip whitespace and ignore
647
commented text */
483
648
while(true){
484
649
sret = getline(&org_line, &size, conffp);
485
650
if(sret == -1){
486
651
break;
487
652
}
488
653
489
654
line = org_line;
490
655
arg = strsep(&line, comment_delim);
491
656
while((p = strsep(&arg, whitespace_delims)) != NULL){
493
658
continue;
494
659
}
495
660
new_arg = strdup(p);
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;
661
if(new_arg == NULL){
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
664
free(org_line);
500
665
goto fallback;
501
666
}
667
668
custom_argc += 1;
669
{
670
char **new_argv = realloc(custom_argv, sizeof(char *)
671
* ((unsigned int)
672
custom_argc + 1));
673
if(new_argv == NULL){
674
error(0, errno, "realloc");
675
exitstatus = EX_OSERR;
676
free(new_arg);
677
free(org_line);
678
goto fallback;
679
} else {
680
custom_argv = new_argv;
681
}
682
}
683
custom_argv[custom_argc-1] = new_arg;
684
custom_argv[custom_argc] = NULL;
502
685
}
503
686
}
687
do {
688
ret = fclose(conffp);
689
} while(ret == EOF and errno == EINTR);
690
if(ret == EOF){
691
error(0, errno, "fclose");
692
exitstatus = EX_IOERR;
693
goto fallback;
694
}
504
695
free(org_line);
505
} else{
696
} else {
506
697
/* Check for harmful errors and go to fallback. Other errors might
507
698
not affect opening plugins */
508
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
509
perror("fopen");
510
exitstatus = EXIT_FAILURE;
699
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
511
702
goto fallback;
512
703
}
513
704
}
514
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
515
707
if(custom_argv != NULL){
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;
708
ret = argp_parse(&argp, custom_argc, custom_argv,
709
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
710
NULL, NULL);
711
switch(ret){
712
case 0:
713
break;
714
case ENOMEM:
715
default:
716
errno = ret;
717
error(0, errno, "argp_parse");
718
exitstatus = EX_OSERR;
719
goto fallback;
720
case EINVAL:
721
exitstatus = EX_CONFIG;
522
722
goto fallback;
523
723
}
524
724
}
525
725
726
/* Parse actual command line arguments, to let them override the
727
config file */
728
ret = argp_parse(&argp, argc, argv,
729
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
730
NULL, NULL);
731
switch(ret){
732
case 0:
733
break;
734
case ENOMEM:
735
default:
736
errno = ret;
737
error(0, errno, "argp_parse");
738
exitstatus = EX_OSERR;
739
goto fallback;
740
case EINVAL:
741
exitstatus = EX_USAGE;
742
goto fallback;
743
}
744
526
745
if(debug){
527
746
for(plugin *p = plugin_list; p != NULL; p=p->next){
528
747
fprintf(stderr, "Plugin: %s has %d arguments\n",
530
749
for(char **a = p->argv; *a != NULL; a++){
531
750
fprintf(stderr, "\tArg: %s\n", *a);
532
751
}
533
fprintf(stderr, "...and %u environment variables\n", p->envc);
752
fprintf(stderr, "...and %d environment variables\n", p->envc);
534
753
for(char **a = p->environ; *a != NULL; a++){
535
754
fprintf(stderr, "\t%s\n", *a);
536
755
}
537
756
}
538
757
}
539
758
759
if(getuid() == 0){
760
/* Work around Debian bug #633582:
761
<http://bugs.debian.org/633582> */
762
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
763
if(plugindir_fd == -1){
764
error(0, errno, "open");
765
} else {
766
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
767
if(ret == -1){
768
error(0, errno, "fstat");
769
} else {
770
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
771
ret = fchown(plugindir_fd, uid, gid);
772
if(ret == -1){
773
error(0, errno, "fchown");
774
}
775
}
776
}
777
TEMP_FAILURE_RETRY(close(plugindir_fd));
778
}
779
}
780
781
/* Lower permissions */
782
ret = setgid(gid);
783
if(ret == -1){
784
error(0, errno, "setgid");
785
}
540
786
ret = setuid(uid);
541
if (ret == -1){
542
perror("setuid");
543
}
544
545
setgid(gid);
546
if (ret == -1){
547
perror("setgid");
548
}
549
550
dir = opendir(plugindir);
551
if(dir == NULL){
552
perror("Could not open plugin dir");
553
exitstatus = EXIT_FAILURE;
554
goto fallback;
555
}
556
557
/* Set the FD_CLOEXEC flag on the directory, if possible */
787
if(ret == -1){
788
error(0, errno, "setuid");
789
}
790
791
/* Open plugin directory with close_on_exec flag */
558
792
{
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
}
793
int dir_fd = -1;
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
} else {
803
dir_fd = open(plugindir, O_RDONLY |
804
#ifdef O_CLOEXEC
805
O_CLOEXEC
806
#else /* not O_CLOEXEC */
807
0
808
#endif /* not O_CLOEXEC */
809
);
810
}
811
if(dir_fd == -1){
812
error(0, errno, "Could not open plugin dir");
813
exitstatus = EX_UNAVAILABLE;
814
goto fallback;
815
}
816
817
#ifndef O_CLOEXEC
818
/* Set the FD_CLOEXEC flag on the directory */
819
ret = set_cloexec_flag(dir_fd);
820
if(ret < 0){
821
error(0, errno, "set_cloexec_flag");
822
TEMP_FAILURE_RETRY(close(dir_fd));
823
exitstatus = EX_OSERR;
824
goto fallback;
825
}
826
#endif /* O_CLOEXEC */
827
828
dir = fdopendir(dir_fd);
829
if(dir == NULL){
830
error(0, errno, "Could not open plugin dir");
831
TEMP_FAILURE_RETRY(close(dir_fd));
832
exitstatus = EX_OSERR;
833
goto fallback;
567
834
}
568
835
}
569
836
570
837
FD_ZERO(&rfds_all);
571
838
839
/* Read and execute any executable in the plugin directory*/
572
840
while(true){
573
dirst = readdir(dir);
841
do {
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
574
844
575
// All directory entries have been processed
845
/* All directory entries have been processed */
576
846
if(dirst == NULL){
577
if (errno == EBADF){
578
perror("readdir");
579
exitstatus = EXIT_FAILURE;
847
if(errno == EBADF){
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
580
850
goto fallback;
581
851
}
582
852
break;
584
854
585
855
d_name_len = strlen(dirst->d_name);
586
856
587
// Ignore dotfiles, backup files and other junk
857
/* Ignore dotfiles, backup files and other junk */
588
858
{
589
859
bool bad_name = false;
590
860
591
const char const *bad_prefixes[] = { ".", "#", NULL };
861
const char * const bad_prefixes[] = { ".", "#", NULL };
592
862
593
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
594
864
".dpkg-old",
865
".dpkg-bak",
595
866
".dpkg-divert", NULL };
596
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
867
#ifdef __GNUC__
868
#pragma GCC diagnostic push
869
#pragma GCC diagnostic ignored "-Wcast-qual"
870
#endif
871
for(const char **pre = (const char **)bad_prefixes;
872
*pre != NULL; pre++){
873
#ifdef __GNUC__
874
#pragma GCC diagnostic pop
875
#endif
597
876
size_t pre_len = strlen(*pre);
598
877
if((d_name_len >= pre_len)
599
878
and strncmp((dirst->d_name), *pre, pre_len) == 0){
605
884
break;
606
885
}
607
886
}
608
609
887
if(bad_name){
610
888
continue;
611
889
}
612
613
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
890
#ifdef __GNUC__
891
#pragma GCC diagnostic push
892
#pragma GCC diagnostic ignored "-Wcast-qual"
893
#endif
894
for(const char **suf = (const char **)bad_suffixes;
895
*suf != NULL; suf++){
896
#ifdef __GNUC__
897
#pragma GCC diagnostic pop
898
#endif
614
899
size_t suf_len = strlen(*suf);
615
900
if((d_name_len >= suf_len)
616
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
617
902
== 0)){
618
903
if(debug){
619
904
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
628
913
continue;
629
914
}
630
915
}
631
916
632
917
char *filename;
633
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
918
if(plugindir == NULL){
919
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
920
dirst->d_name));
921
} else {
922
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
923
plugindir,
924
dirst->d_name));
925
}
634
926
if(ret < 0){
635
perror("asprintf");
927
error(0, errno, "asprintf");
636
928
continue;
637
929
}
638
930
639
ret = stat(filename, &st);
640
if (ret == -1){
641
perror("stat");
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
932
if(ret == -1){
933
error(0, errno, "stat");
642
934
free(filename);
643
935
continue;
644
936
}
645
937
646
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
938
/* Ignore non-executable files */
939
if(not S_ISREG(st.st_mode)
940
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
647
941
if(debug){
648
942
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
649
943
" with bad type or mode\n", filename);
651
945
free(filename);
652
946
continue;
653
947
}
654
plugin *p = getplugin(dirst->d_name, &plugin_list);
948
949
plugin *p = getplugin(dirst->d_name);
655
950
if(p == NULL){
656
perror("getplugin");
951
error(0, errno, "getplugin");
657
952
free(filename);
658
953
continue;
659
954
}
667
962
}
668
963
{
669
964
/* Add global arguments to argument list for this plugin */
670
plugin *g = getplugin(NULL, &plugin_list);
965
plugin *g = getplugin(NULL);
671
966
if(g != NULL){
672
967
for(char **a = g->argv + 1; *a != NULL; a++){
673
968
if(not add_argument(p, *a)){
674
perror("add_argument");
969
error(0, errno, "add_argument");
675
970
}
676
971
}
677
972
/* Add global environment variables */
678
973
for(char **e = g->environ; *e != NULL; e++){
679
if(not add_environment(p, *e)){
680
perror("add_environment");
974
if(not add_environment(p, *e, false)){
975
error(0, errno, "add_environment");
681
976
}
682
977
}
683
978
}
687
982
process, too. */
688
983
if(p->environ[0] != NULL){
689
984
for(char **e = environ; *e != NULL; e++){
690
char *copy = strdup(*e);
691
if(copy == NULL){
692
perror("strdup");
693
continue;
694
}
695
if(not add_environment(p, copy)){
696
perror("add_environment");
985
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
697
987
}
698
988
}
699
989
}
700
990
701
991
int pipefd[2];
702
ret = pipe(pipefd);
703
if (ret == -1){
704
perror("pipe");
705
exitstatus = EXIT_FAILURE;
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
if(ret == -1){
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
706
996
goto fallback;
707
997
}
998
/* Ask OS to automatic close the pipe on exec */
708
999
ret = set_cloexec_flag(pipefd[0]);
709
1000
if(ret < 0){
710
perror("set_cloexec_flag");
711
exitstatus = EXIT_FAILURE;
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
712
1003
goto fallback;
713
1004
}
714
1005
ret = set_cloexec_flag(pipefd[1]);
715
1006
if(ret < 0){
716
perror("set_cloexec_flag");
717
exitstatus = EXIT_FAILURE;
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
718
1009
goto fallback;
719
1010
}
720
1011
/* Block SIGCHLD until process is safely in process list */
721
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1012
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1013
&sigchld_action.sa_mask,
1014
NULL));
722
1015
if(ret < 0){
723
perror("sigprocmask");
724
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
725
1018
goto fallback;
726
1019
}
727
// Starting a new process to be watched
728
pid_t pid = fork();
1020
/* Starting a new process to be watched */
1021
pid_t pid;
1022
do {
1023
pid = fork();
1024
} while(pid == -1 and errno == EINTR);
729
1025
if(pid == -1){
730
perror("fork");
731
exitstatus = EXIT_FAILURE;
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
732
1028
goto fallback;
733
1029
}
734
1030
if(pid == 0){
735
1031
/* this is the child process */
736
1032
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
737
1033
if(ret < 0){
738
perror("sigaction");
739
_exit(EXIT_FAILURE);
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
740
1036
}
741
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
742
1038
if(ret < 0){
743
perror("sigprocmask");
744
_exit(EXIT_FAILURE);
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
745
1041
}
746
1042
747
1043
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
748
1044
if(ret == -1){
749
perror("dup2");
750
_exit(EXIT_FAILURE);
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
751
1047
}
752
1048
753
1049
if(dirfd(dir) < 0){
757
1053
}
758
1054
if(p->environ[0] == NULL){
759
1055
if(execv(filename, p->argv) < 0){
760
perror("execv");
761
_exit(EXIT_FAILURE);
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
762
1058
}
763
1059
} else {
764
1060
if(execve(filename, p->argv, p->environ) < 0){
765
perror("execve");
766
_exit(EXIT_FAILURE);
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
767
1063
}
768
1064
}
769
1065
/* no return */
770
1066
}
771
/* parent process */
1067
/* Parent process */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1069
pipe */
772
1070
free(filename);
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);
1071
plugin *new_plugin = getplugin(dirst->d_name);
1072
if(new_plugin == NULL){
1073
error(0, errno, "getplugin");
1074
ret = (int)(TEMP_FAILURE_RETRY
1075
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1076
NULL)));
778
1077
if(ret < 0){
779
perror("sigprocmask");
1078
error(0, errno, "sigprocmask");
780
1079
}
781
exitstatus = EXIT_FAILURE;
1080
exitstatus = EX_OSERR;
782
1081
goto fallback;
783
1082
}
784
1083
785
*new_process = (struct process){ .pid = pid,
786
.fd = pipefd[0],
787
.next = process_list };
788
// List handling
789
process_list = new_process;
1084
new_plugin->pid = pid;
1085
new_plugin->fd = pipefd[0];
1086
790
1087
/* Unblock SIGCHLD so signal handler can be run if this process
791
1088
has already completed */
792
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
1091
NULL));
793
1092
if(ret < 0){
794
perror("sigprocmask");
795
exitstatus = EXIT_FAILURE;
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
796
1095
goto fallback;
797
1096
}
798
1097
799
FD_SET(new_process->fd, &rfds_all);
1098
#if defined (__GNUC__) and defined (__GLIBC__)
1099
#if not __GLIBC_PREREQ(2, 16)
1100
#pragma GCC diagnostic push
1101
#pragma GCC diagnostic ignored "-Wsign-conversion"
1102
#endif
1103
#endif
1104
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion in GNU libc
1106
before 2.16 */
1107
#if defined (__GNUC__) and defined (__GLIBC__)
1108
#if not __GLIBC_PREREQ(2, 16)
1109
#pragma GCC diagnostic pop
1110
#endif
1111
#endif
800
1112
801
if (maxfd < new_process->fd){
802
maxfd = new_process->fd;
1113
if(maxfd < new_plugin->fd){
1114
maxfd = new_plugin->fd;
803
1115
}
804
805
1116
}
806
1117
807
free_plugin_list(plugin_list);
808
plugin_list = NULL;
809
810
closedir(dir);
1118
TEMP_FAILURE_RETRY(closedir(dir));
811
1119
dir = NULL;
812
813
if (process_list == NULL){
814
fprintf(stderr, "No plugin processes started. Incorrect plugin"
815
" directory?\n");
816
process_list = NULL;
1120
free_plugin(getplugin(NULL));
1121
1122
for(plugin *p = plugin_list; p != NULL; p = p->next){
1123
if(p->pid != 0){
1124
break;
1125
}
1126
if(p->next == NULL){
1127
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1128
" directory?\n");
1129
free_plugin_list();
1130
}
817
1131
}
818
while(process_list){
1132
1133
/* Main loop while running plugins exist */
1134
while(plugin_list){
819
1135
fd_set rfds = rfds_all;
820
1136
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
821
if (select_ret == -1){
822
perror("select");
823
exitstatus = EXIT_FAILURE;
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
824
1140
goto fallback;
825
1141
}
826
1142
/* OK, now either a process completed, or something can be read
827
1143
from one of them */
828
for(process *proc = process_list; proc ; proc = proc->next){
1144
for(plugin *proc = plugin_list; proc != NULL;){
829
1145
/* Is this process completely done? */
830
if(proc->eof and proc->completed){
1146
if(proc->completed and proc->eof){
831
1147
/* Only accept the plugin output if it exited cleanly */
832
1148
if(not WIFEXITED(proc->status)
833
1149
or WEXITSTATUS(proc->status) != 0){
834
1150
/* Bad exit by plugin */
1151
835
1152
if(debug){
836
1153
if(WIFEXITED(proc->status)){
837
fprintf(stderr, "Plugin %u exited with status %d\n",
838
(unsigned int) (proc->pid),
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
839
1157
WEXITSTATUS(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));
1158
} else if(WIFSIGNALED(proc->status)){
1159
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1160
" signal %d: %s\n", proc->name,
1161
(intmax_t) (proc->pid),
1162
WTERMSIG(proc->status),
1163
strsignal(WTERMSIG(proc->status)));
844
1164
} else if(WCOREDUMP(proc->status)){
845
fprintf(stderr, "Plugin %d dumped core\n",
846
(unsigned int) (proc->pid));
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
847
1167
}
848
1168
}
1169
849
1170
/* Remove the plugin */
850
FD_CLR(proc->fd, &rfds_all);
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic push
1174
#pragma GCC diagnostic ignored "-Wsign-conversion"
1175
#endif
1176
#endif
1177
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1178
-Wconversion in GNU libc
1179
before 2.16 */
1180
#if defined (__GNUC__) and defined (__GLIBC__)
1181
#if not __GLIBC_PREREQ(2, 16)
1182
#pragma GCC diagnostic pop
1183
#endif
1184
#endif
1185
851
1186
/* Block signal while modifying process_list */
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1188
(SIG_BLOCK,
1189
&sigchld_action.sa_mask,
1190
NULL));
853
1191
if(ret < 0){
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
856
1194
goto fallback;
857
1195
}
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
}
1196
1197
plugin *next_plugin = proc->next;
1198
free_plugin(proc);
1199
proc = next_plugin;
1200
871
1201
/* We are done modifying process list, so unblock signal */
872
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
873
NULL);
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
874
1205
if(ret < 0){
875
perror("sigprocmask");
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;
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
1208
goto fallback;
1209
}
1210
1211
if(plugin_list == NULL){
1212
break;
1213
}
1214
1215
continue;
883
1216
}
1217
884
1218
/* This process exited nicely, so print its buffer */
885
1219
886
1220
bool bret = print_out_password(proc->buffer,
887
1221
proc->buffer_length);
888
1222
if(not bret){
889
perror("print_out_password");
890
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
891
1225
}
892
1226
goto fallback;
893
1227
}
1228
894
1229
/* This process has not completed. Does it have any output? */
895
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1230
#if defined (__GNUC__) and defined (__GLIBC__)
1231
#if not __GLIBC_PREREQ(2, 16)
1232
#pragma GCC diagnostic push
1233
#pragma GCC diagnostic ignored "-Wsign-conversion"
1234
#endif
1235
#endif
1236
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1237
warning from
1238
-Wconversion
1239
in GNU libc
1240
before
1241
2.16 */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic pop
1245
#endif
1246
#endif
896
1247
/* This process had nothing to say at this time */
1248
proc = proc->next;
897
1249
continue;
898
1250
}
899
1251
/* Before reading, make the process' data buffer large enough */
900
1252
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
901
proc->buffer = realloc(proc->buffer, proc->buffer_size
902
+ (size_t) BUFFER_SIZE);
903
if (proc->buffer == NULL){
904
perror("malloc");
905
exitstatus = EXIT_FAILURE;
1253
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1254
+ (size_t) BUFFER_SIZE);
1255
if(new_buffer == NULL){
1256
error(0, errno, "malloc");
1257
exitstatus = EX_OSERR;
906
1258
goto fallback;
907
1259
}
1260
proc->buffer = new_buffer;
908
1261
proc->buffer_size += BUFFER_SIZE;
909
1262
}
910
1263
/* Read from the process */
911
ret = read(proc->fd, proc->buffer + proc->buffer_length,
912
BUFFER_SIZE);
913
if(ret < 0){
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1265
proc->buffer
1266
+ proc->buffer_length,
1267
BUFFER_SIZE));
1268
if(sret < 0){
914
1269
/* Read error from this process; ignore the error */
1270
proc = proc->next;
915
1271
continue;
916
1272
}
917
if(ret == 0){
1273
if(sret == 0){
918
1274
/* got EOF */
919
1275
proc->eof = true;
920
1276
} else {
921
proc->buffer_length += (size_t) ret;
1277
proc->buffer_length += (size_t) sret;
922
1278
}
923
1279
}
924
1280
}
925
926
1281
1282
927
1283
fallback:
928
1284
929
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
930
1287
/* Fallback if all plugins failed, none are found or an error
931
1288
occured */
932
1289
bool bret;
933
1290
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
934
1291
char *passwordbuffer = getpass("Password: ");
935
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1292
size_t len = strlen(passwordbuffer);
1293
/* Strip trailing newline */
1294
if(len > 0 and passwordbuffer[len-1] == '\n'){
1295
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1296
len--;
1297
}
1298
bret = print_out_password(passwordbuffer, len);
936
1299
if(not bret){
937
perror("print_out_password");
938
exitstatus = EXIT_FAILURE;
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
939
1302
}
940
1303
}
941
1304
942
1305
/* Restore old signal handler */
943
1306
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
944
1307
if(ret == -1){
945
perror("sigaction");
946
exitstatus = EXIT_FAILURE;
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
947
1310
}
948
1311
949
1312
if(custom_argv != NULL){
950
for(char **arg = custom_argv; *arg != NULL; arg++){
1313
for(char **arg = custom_argv+1; *arg != NULL; arg++){
951
1314
free(*arg);
952
1315
}
953
1316
free(custom_argv);
954
1317
}
955
free_plugin_list(plugin_list);
956
1318
957
1319
if(dir != NULL){
958
1320
closedir(dir);
959
1321
}
960
1322
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");
1323
/* Kill the processes */
1324
for(plugin *p = plugin_list; p != NULL; p = p->next){
1325
if(p->pid != 0){
1326
close(p->fd);
1327
ret = kill(p->pid, SIGTERM);
1328
if(ret == -1 and errno != ESRCH){
1329
/* Set-uid proccesses might not get closed */
1330
error(0, errno, "kill");
1331
}
969
1332
}
970
free(process_list->buffer);
971
free(process_list);
972
1333
}
973
1334
974
1335
/* Wait for any remaining child processes to terminate */
975
do{
1336
do {
976
1337
ret = wait(NULL);
977
1338
} while(ret >= 0);
978
1339
if(errno != ECHILD){
979
perror("wait");
1340
error(0, errno, "wait");
980
1341
}
981
1342
1343
free_plugin_list();
1344
1345
free(plugindir);
1346
free(argfile);
1347
982
1348
return exitstatus;
983
1349
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0