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- Committer: Teddy Hogeborn
- Date: 2009-09-23 20:31:47 UTC
- mto: (24.1.146 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20090923203147-mbs7klc1tugrrdwf
* mandos (Client.__init__): Open "secfile" file in binary mode.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
6
7
*
7
8
* This program is free software: you can redistribute it and/or
8
9
* modify it under the terms of the GNU General Public License as
21
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
23
*/
23
24
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
26
27
#include <stddef.h> /* size_t, NULL */
27
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
29
EXIT_SUCCESS, realloc() */
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
35
36
uid_t, gid_t, getuid(), getgid(),
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
46
readdir(), closedir(), dirfd() */
45
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
48
fcntl(), setuid(), setgid(),
47
49
F_GETFD, F_SETFD, FD_CLOEXEC,
48
50
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
51
dup2(), STDOUT_FILENO, _exit(),
50
52
execv(), write(), read(),
51
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
55
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), strcpy(),
55
strcat() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
56
58
#include <errno.h> /* errno */
57
59
#include <argp.h> /* struct argp_option, struct
58
60
argp_state, struct argp,
59
61
argp_parse(), ARGP_ERR_UNKNOWN,
60
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
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() */
66
71
67
72
#define BUFFER_SIZE 256
68
73
69
const char *argp_program_version = "mandos-client 1.0";
74
#define PDIR "/lib/mandos/plugins.d"
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
77
const char *argp_program_version = "plugin-runner " VERSION;
70
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
79
72
struct process;
73
74
typedef struct process{
80
typedef struct plugin{
81
char *name; /* can be NULL or any plugin name */
82
char **argv;
83
int argc;
84
char **environ;
85
int envc;
86
bool disabled;
87
88
/* Variables used for running processes*/
75
89
pid_t pid;
76
90
int fd;
77
91
char *buffer;
78
92
size_t buffer_size;
79
93
size_t buffer_length;
80
94
bool eof;
81
bool completed;
95
volatile sig_atomic_t completed;
82
96
int status;
83
struct process *next;
84
} process;
85
86
typedef struct plugin{
87
char *name; /* can be NULL or any plugin name */
88
char **argv;
89
int argc;
90
bool disabled;
91
97
struct plugin *next;
92
98
} plugin;
93
99
94
static plugin *getplugin(char *name, plugin **plugin_list){
95
for (plugin *p = *plugin_list; p != NULL; p = p->next){
96
if ((p->name == name)
97
or (p->name and name and (strcmp(p->name, name) == 0))){
100
static plugin *plugin_list = NULL;
101
102
/* Gets an existing plugin based on name,
103
or if none is found, creates a new one */
104
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
if((p->name == name)
108
or (p->name and name and (strcmp(p->name, name) == 0))){
98
109
return p;
99
110
}
100
111
}
101
112
/* Create a new plugin */
102
plugin *new_plugin = malloc(sizeof(plugin));
103
if (new_plugin == NULL){
104
perror("malloc");
105
exit(EXIT_FAILURE);
106
}
107
new_plugin->name = name;
108
new_plugin->argv = malloc(sizeof(char *) * 2);
109
if (new_plugin->argv == NULL){
110
perror("malloc");
111
exit(EXIT_FAILURE);
112
}
113
new_plugin->argv[0] = name;
113
plugin *new_plugin = NULL;
114
do {
115
new_plugin = malloc(sizeof(plugin));
116
} while(new_plugin == NULL and errno == EINTR);
117
if(new_plugin == NULL){
118
return NULL;
119
}
120
char *copy_name = NULL;
121
if(name != NULL){
122
do {
123
copy_name = strdup(name);
124
} while(copy_name == NULL and errno == EINTR);
125
if(copy_name == NULL){
126
free(new_plugin);
127
return NULL;
128
}
129
}
130
131
*new_plugin = (plugin){ .name = copy_name,
132
.argc = 1,
133
.disabled = false,
134
.next = plugin_list };
135
136
do {
137
new_plugin->argv = malloc(sizeof(char *) * 2);
138
} while(new_plugin->argv == NULL and errno == EINTR);
139
if(new_plugin->argv == NULL){
140
free(copy_name);
141
free(new_plugin);
142
return NULL;
143
}
144
new_plugin->argv[0] = copy_name;
114
145
new_plugin->argv[1] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
146
147
do {
148
new_plugin->environ = malloc(sizeof(char *));
149
} while(new_plugin->environ == NULL and errno == EINTR);
150
if(new_plugin->environ == NULL){
151
free(copy_name);
152
free(new_plugin->argv);
153
free(new_plugin);
154
return NULL;
155
}
156
new_plugin->environ[0] = NULL;
157
118
158
/* Append the new plugin to the list */
119
*plugin_list = new_plugin;
159
plugin_list = new_plugin;
120
160
return new_plugin;
121
161
}
122
162
123
static void addargument(plugin *p, char *arg){
124
p->argv[p->argc] = arg;
125
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
if (p->argv == NULL){
127
perror("malloc");
128
exit(EXIT_FAILURE);
129
}
130
p->argc++;
131
p->argv[p->argc] = NULL;
163
/* Helper function for add_argument and add_environment */
164
static bool add_to_char_array(const char *new, char ***array,
165
int *len){
166
/* Resize the pointed-to array to hold one more pointer */
167
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
171
/* Malloc check */
172
if(*array == NULL){
173
return false;
174
}
175
/* Make a copy of the new string */
176
char *copy;
177
do {
178
copy = strdup(new);
179
} while(copy == NULL and errno == EINTR);
180
if(copy == NULL){
181
return false;
182
}
183
/* Insert the copy */
184
(*array)[*len] = copy;
185
(*len)++;
186
/* Add a new terminating NULL pointer to the last element */
187
(*array)[*len] = NULL;
188
return true;
189
}
190
191
/* Add to a plugin's argument vector */
192
static bool add_argument(plugin *p, const char *arg){
193
if(p == NULL){
194
return false;
195
}
196
return add_to_char_array(arg, &(p->argv), &(p->argc));
197
}
198
199
/* Add to a plugin's environment */
200
static bool add_environment(plugin *p, const char *def, bool replace){
201
if(p == NULL){
202
return false;
203
}
204
/* namelen = length of name of environment variable */
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
209
/* It already exists */
210
if(replace){
211
char *new;
212
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
216
return false;
217
}
218
*e = new;
219
strcpy(*e, def);
220
}
221
return true;
222
}
223
}
224
return add_to_char_array(def, &(p->environ), &(p->envc));
132
225
}
133
226
134
227
/*
135
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
136
229
* Descriptor Flags".
137
* *Note File Descriptor Flags:(libc)Descriptor Flags.
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
138
231
*/
139
static int set_cloexec_flag(int fd)
140
{
141
int ret = fcntl(fd, F_GETFD, 0);
232
static int set_cloexec_flag(int fd){
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
142
234
/* If reading the flags failed, return error indication now. */
143
235
if(ret < 0){
144
236
return ret;
145
237
}
146
238
/* Store modified flag word in the descriptor. */
147
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
240
ret | FD_CLOEXEC));
148
241
}
149
242
150
process *process_list = NULL;
151
243
152
/* Mark a process as completed when it exits, and save its exit
244
/* Mark processes as completed when they exit, and save their exit
153
245
status. */
154
void handle_sigchld(__attribute__((unused)) int sig){
155
process *proc = process_list;
156
int status;
157
pid_t pid = wait(&status);
158
if(pid == -1){
159
perror("wait");
160
return;
161
}
162
while(proc != NULL and proc->pid != pid){
163
proc = proc->next;
164
}
165
if(proc == NULL){
166
/* Process not found in process list */
167
return;
168
}
169
proc->status = status;
170
proc->completed = true;
246
static void handle_sigchld(__attribute__((unused)) int sig){
247
int old_errno = errno;
248
while(true){
249
plugin *proc = plugin_list;
250
int status;
251
pid_t pid = waitpid(-1, &status, WNOHANG);
252
if(pid == 0){
253
/* Only still running child processes */
254
break;
255
}
256
if(pid == -1){
257
if(errno == ECHILD){
258
/* No child processes */
259
break;
260
}
261
perror("waitpid");
262
}
263
264
/* A child exited, find it in process_list */
265
while(proc != NULL and proc->pid != pid){
266
proc = proc->next;
267
}
268
if(proc == NULL){
269
/* Process not found in process list */
270
continue;
271
}
272
proc->status = status;
273
proc->completed = 1;
274
}
275
errno = old_errno;
171
276
}
172
277
173
bool print_out_password(const char *buffer, size_t length){
278
/* Prints out a password to stdout */
279
static bool print_out_password(const char *buffer, size_t length){
174
280
ssize_t ret;
175
if(length>0 and buffer[length-1] == '\n'){
176
length--;
177
}
178
281
for(size_t written = 0; written < length; written += (size_t)ret){
179
282
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
180
283
length - written));
185
288
return true;
186
289
}
187
290
291
/* Removes and free a plugin from the plugin list */
292
static void free_plugin(plugin *plugin_node){
293
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
295
free(*arg);
296
}
297
free(plugin_node->argv);
298
for(char **env = plugin_node->environ; *env != NULL; env++){
299
free(*env);
300
}
301
free(plugin_node->environ);
302
free(plugin_node->buffer);
303
304
/* Removes the plugin from the singly-linked list */
305
if(plugin_node == plugin_list){
306
/* First one - simple */
307
plugin_list = plugin_list->next;
308
} else {
309
/* Second one or later */
310
for(plugin *p = plugin_list; p != NULL; p = p->next){
311
if(p->next == plugin_node){
312
p->next = plugin_node->next;
313
break;
314
}
315
}
316
}
317
318
free(plugin_node);
319
}
320
321
static void free_plugin_list(void){
322
while(plugin_list != NULL){
323
free_plugin(plugin_list);
324
}
325
}
326
188
327
int main(int argc, char *argv[]){
189
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
328
char *plugindir = NULL;
329
char *argfile = NULL;
330
FILE *conffp;
190
331
size_t d_name_len;
191
332
DIR *dir = NULL;
192
333
struct dirent *dirst;
193
334
struct stat st;
194
335
fd_set rfds_all;
195
336
int ret, maxfd = 0;
337
ssize_t sret;
196
338
uid_t uid = 65534;
197
339
gid_t gid = 65534;
198
340
bool debug = false;
200
342
struct sigaction old_sigchld_action;
201
343
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
202
344
.sa_flags = SA_NOCLDSTOP };
203
char *plus_options = NULL;
204
char **plus_argv = NULL;
205
345
char **custom_argv = NULL;
346
int custom_argc = 0;
347
206
348
/* Establish a signal handler */
207
349
sigemptyset(&sigchld_action.sa_mask);
208
350
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
209
if(ret < 0){
351
if(ret == -1){
210
352
perror("sigaddset");
211
exit(EXIT_FAILURE);
353
exitstatus = EXIT_FAILURE;
354
goto fallback;
212
355
}
213
356
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
214
if(ret < 0){
357
if(ret == -1){
215
358
perror("sigaction");
216
exit(EXIT_FAILURE);
359
exitstatus = EXIT_FAILURE;
360
goto fallback;
217
361
}
218
362
219
363
/* The options we understand. */
221
365
{ .name = "global-options", .key = 'g',
222
366
.arg = "OPTION[,OPTION[,...]]",
223
367
.doc = "Options passed to all plugins" },
368
{ .name = "global-env", .key = 'G',
369
.arg = "VAR=value",
370
.doc = "Environment variable passed to all plugins" },
224
371
{ .name = "options-for", .key = 'o',
225
372
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
226
373
.doc = "Options passed only to specified plugin" },
374
{ .name = "env-for", .key = 'E',
375
.arg = "PLUGIN:ENV=value",
376
.doc = "Environment variable passed to specified plugin" },
227
377
{ .name = "disable", .key = 'd',
228
378
.arg = "PLUGIN",
229
379
.doc = "Disable a specific plugin", .group = 1 },
380
{ .name = "enable", .key = 'e',
381
.arg = "PLUGIN",
382
.doc = "Enable a specific plugin", .group = 1 },
230
383
{ .name = "plugin-dir", .key = 128,
231
384
.arg = "DIRECTORY",
232
385
.doc = "Specify a different plugin directory", .group = 2 },
233
{ .name = "userid", .key = 129,
234
.arg = "ID", .flags = 0,
235
.doc = "User ID the plugins will run as", .group = 2 },
236
{ .name = "groupid", .key = 130,
237
.arg = "ID", .flags = 0,
238
.doc = "Group ID the plugins will run as", .group = 2 },
239
{ .name = "debug", .key = 131,
240
.doc = "Debug mode", .group = 3 },
386
{ .name = "config-file", .key = 129,
387
.arg = "FILE",
388
.doc = "Specify a different configuration file", .group = 2 },
389
{ .name = "userid", .key = 130,
390
.arg = "ID", .flags = 0,
391
.doc = "User ID the plugins will run as", .group = 3 },
392
{ .name = "groupid", .key = 131,
393
.arg = "ID", .flags = 0,
394
.doc = "Group ID the plugins will run as", .group = 3 },
395
{ .name = "debug", .key = 132,
396
.doc = "Debug mode", .group = 4 },
241
397
{ .name = NULL }
242
398
};
243
399
244
error_t parse_opt (int key, char *arg, struct argp_state *state) {
245
/* Get the INPUT argument from `argp_parse', which we know is a
246
pointer to our plugin list pointer. */
247
plugin **plugins = state->input;
248
switch (key) {
249
case 'g':
250
if (arg != NULL){
251
char *p;
252
while((p = strsep(&arg, ",")) != NULL){
253
if(strcmp(p, "") == 0){
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
402
switch(key){
403
char *tmp;
404
intmax_t tmpmax;
405
case 'g': /* --global-options */
406
if(arg != NULL){
407
char *plugin_option;
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
254
410
continue;
255
411
}
256
addargument(getplugin(NULL, plugins), p);
257
}
258
}
259
break;
260
case 'o':
261
if (arg != NULL){
262
char *name = strsep(&arg, ":");
263
if(strcmp(name, "") == 0){
264
break;
265
}
266
char *opt = strsep(&arg, ":");
267
if(strcmp(opt, "") == 0){
268
break;
269
}
270
if(opt != NULL){
271
char *p;
272
while((p = strsep(&opt, ",")) != NULL){
273
if(strcmp(p, "") == 0){
274
continue;
275
}
276
addargument(getplugin(name, plugins), p);
277
}
278
}
279
}
280
break;
281
case 'd':
282
if (arg != NULL){
283
getplugin(arg, plugins)->disabled = true;
284
}
285
break;
286
case 128:
287
plugindir = arg;
288
break;
289
case 129:
290
uid = (uid_t)strtol(arg, NULL, 10);
291
break;
292
case 130:
293
gid = (gid_t)strtol(arg, NULL, 10);
294
break;
295
case 131:
412
if(not add_argument(getplugin(NULL), plugin_option)){
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
415
}
416
}
417
}
418
break;
419
case 'G': /* --global-env */
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
425
}
426
break;
427
case 'o': /* --options-for */
428
if(arg != NULL){
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
431
break;
432
}
433
char *plugin_option;
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
436
perror("add_argument");
437
return ARGP_ERR_UNKNOWN;
438
}
439
}
440
}
441
break;
442
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
446
{
447
char *envdef = strchr(arg, ':');
448
if(envdef == NULL){
449
break;
450
}
451
*envdef = '\0';
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
454
}
455
}
456
break;
457
case 'd': /* --disable */
458
if(arg != NULL){
459
plugin *p = getplugin(arg);
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
462
}
463
p->disabled = true;
464
}
465
break;
466
case 'e': /* --enable */
467
if(arg != NULL){
468
plugin *p = getplugin(arg);
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
471
}
472
p->disabled = false;
473
}
474
break;
475
case 128: /* --plugin-dir */
476
free(plugindir);
477
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
480
}
481
break;
482
case 129: /* --config-file */
483
/* This is already done by parse_opt_config_file() */
484
break;
485
case 130: /* --userid */
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
488
if(errno != 0 or tmp == arg or *tmp != '\0'
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
494
}
495
break;
496
case 131: /* --groupid */
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
499
if(errno != 0 or tmp == arg or *tmp != '\0'
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
505
}
506
break;
507
case 132: /* --debug */
296
508
debug = true;
297
509
break;
298
case ARGP_KEY_ARG:
299
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
300
argp_usage (state);
301
}
302
plus_options = arg;
303
break;
304
case ARGP_KEY_END:
305
break;
306
default:
307
return ARGP_ERR_UNKNOWN;
308
}
309
return 0;
310
}
311
312
plugin *plugin_list = NULL;
313
314
struct argp argp = { .options = options, .parser = parse_opt,
315
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
510
/*
511
* When adding more options before this line, remember to also add a
512
* "case" to the "parse_opt_config_file" function below.
513
*/
514
case ARGP_KEY_ARG:
515
/* Cryptsetup always passes an argument, which is an empty
516
string if "none" was specified in /etc/crypttab. So if
517
argument was empty, we ignore it silently. */
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
520
}
521
break;
522
case ARGP_KEY_END:
523
break;
524
default:
525
return ARGP_ERR_UNKNOWN;
526
}
527
return 0;
528
}
529
530
/* This option parser is the same as parse_opt() above, except it
531
ignores everything but the --config-file option. */
532
error_t parse_opt_config_file(int key, char *arg,
533
__attribute__((unused))
534
struct argp_state *state){
535
switch(key){
536
case 'g': /* --global-options */
537
case 'G': /* --global-env */
538
case 'o': /* --options-for */
539
case 'E': /* --env-for */
540
case 'd': /* --disable */
541
case 'e': /* --enable */
542
case 128: /* --plugin-dir */
543
break;
544
case 129: /* --config-file */
545
free(argfile);
546
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
549
}
550
break;
551
case 130: /* --userid */
552
case 131: /* --groupid */
553
case 132: /* --debug */
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
556
break;
557
default:
558
return ARGP_ERR_UNKNOWN;
559
}
560
return 0;
561
}
562
563
struct argp argp = { .options = options,
564
.parser = parse_opt_config_file,
565
.args_doc = "",
316
566
.doc = "Mandos plugin runner -- Run plugins" };
317
567
318
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
319
if (ret == ARGP_ERR_UNKNOWN){
568
/* Parse using parse_opt_config_file() in order to get the custom
569
config file location, if any. */
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
320
572
fprintf(stderr, "Unknown error while parsing arguments\n");
321
573
exitstatus = EXIT_FAILURE;
322
goto end;
323
}
324
325
if(plus_options){
326
/* This is a mangled argument in the form of
327
"+--option+--other-option=parameter+--yet-another-option", etc */
328
/* Make new argc and argv vars, and call argp_parse() again. */
329
plus_options++; /* skip the first '+' character */
330
const char delims[] = "+";
331
char *arg;
332
int new_argc = 1;
333
plus_argv = malloc(sizeof(char*) * 2);
334
if(plus_argv == NULL){
574
goto fallback;
575
}
576
577
/* Reset to the normal argument parser */
578
argp.parser = parse_opt;
579
580
/* Open the configfile if available */
581
if(argfile == NULL){
582
conffp = fopen(AFILE, "r");
583
} else {
584
conffp = fopen(argfile, "r");
585
}
586
if(conffp != NULL){
587
char *org_line = NULL;
588
char *p, *arg, *new_arg, *line;
589
size_t size = 0;
590
const char whitespace_delims[] = " \r\t\f\v\n";
591
const char comment_delim[] = "#";
592
593
custom_argc = 1;
594
custom_argv = malloc(sizeof(char*) * 2);
595
if(custom_argv == NULL){
335
596
perror("malloc");
336
597
exitstatus = EXIT_FAILURE;
337
goto end;
338
}
339
plus_argv[0] = argv[0];
340
plus_argv[1] = NULL;
341
342
while((arg = strsep(&plus_options, delims)) != NULL){
343
new_argc++;
344
plus_argv = realloc(plus_argv, sizeof(char *)
345
* ((unsigned int) new_argc + 1));
346
if(plus_argv == NULL){
347
perror("realloc");
348
exitstatus = EXIT_FAILURE;
349
goto end;
350
}
351
plus_argv[new_argc-1] = arg;
352
plus_argv[new_argc] = NULL;
353
}
354
355
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
356
if (ret == ARGP_ERR_UNKNOWN){
598
goto fallback;
599
}
600
custom_argv[0] = argv[0];
601
custom_argv[1] = NULL;
602
603
/* for each line in the config file, strip whitespace and ignore
604
commented text */
605
while(true){
606
sret = getline(&org_line, &size, conffp);
607
if(sret == -1){
608
break;
609
}
610
611
line = org_line;
612
arg = strsep(&line, comment_delim);
613
while((p = strsep(&arg, whitespace_delims)) != NULL){
614
if(p[0] == '\0'){
615
continue;
616
}
617
new_arg = strdup(p);
618
if(new_arg == NULL){
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
621
free(org_line);
622
goto fallback;
623
}
624
625
custom_argc += 1;
626
custom_argv = realloc(custom_argv, sizeof(char *)
627
* ((unsigned int) custom_argc + 1));
628
if(custom_argv == NULL){
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
631
free(org_line);
632
goto fallback;
633
}
634
custom_argv[custom_argc-1] = new_arg;
635
custom_argv[custom_argc] = NULL;
636
}
637
}
638
do {
639
ret = fclose(conffp);
640
} while(ret == EOF and errno == EINTR);
641
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
644
goto fallback;
645
}
646
free(org_line);
647
} else {
648
/* Check for harmful errors and go to fallback. Other errors might
649
not affect opening plugins */
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
653
goto fallback;
654
}
655
}
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
658
if(custom_argv != NULL){
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
660
0, NULL);
661
if(ret == ARGP_ERR_UNKNOWN){
357
662
fprintf(stderr, "Unknown error while parsing arguments\n");
358
663
exitstatus = EXIT_FAILURE;
359
goto end;
664
goto fallback;
360
665
}
361
666
}
362
667
668
/* Parse actual command line arguments, to let them override the
669
config file */
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
672
fprintf(stderr, "Unknown error while parsing arguments\n");
673
exitstatus = EXIT_FAILURE;
674
goto fallback;
675
}
676
363
677
if(debug){
364
678
for(plugin *p = plugin_list; p != NULL; p=p->next){
365
679
fprintf(stderr, "Plugin: %s has %d arguments\n",
367
681
for(char **a = p->argv; *a != NULL; a++){
368
682
fprintf(stderr, "\tArg: %s\n", *a);
369
683
}
684
fprintf(stderr, "...and %d environment variables\n", p->envc);
685
for(char **a = p->environ; *a != NULL; a++){
686
fprintf(stderr, "\t%s\n", *a);
687
}
370
688
}
371
689
}
372
690
691
/* Strip permissions down to nobody */
692
setgid(gid);
693
if(ret == -1){
694
perror("setgid");
695
}
373
696
ret = setuid(uid);
374
if (ret == -1){
697
if(ret == -1){
375
698
perror("setuid");
376
699
}
377
700
378
setgid(gid);
379
if (ret == -1){
380
perror("setgid");
381
}
382
383
dir = opendir(plugindir);
384
if(dir == NULL){
385
perror("Could not open plugin dir");
386
exitstatus = EXIT_FAILURE;
387
goto end;
388
}
389
390
/* Set the FD_CLOEXEC flag on the directory, if possible */
701
/* Open plugin directory with close_on_exec flag */
391
702
{
392
int dir_fd = dirfd(dir);
393
if(dir_fd >= 0){
394
ret = set_cloexec_flag(dir_fd);
395
if(ret < 0){
396
perror("set_cloexec_flag");
397
exitstatus = EXIT_FAILURE;
398
goto end;
399
}
703
int dir_fd = -1;
704
if(plugindir == NULL){
705
dir_fd = open(PDIR, O_RDONLY |
706
#ifdef O_CLOEXEC
707
O_CLOEXEC
708
#else /* not O_CLOEXEC */
709
0
710
#endif /* not O_CLOEXEC */
711
);
712
} else {
713
dir_fd = open(plugindir, O_RDONLY |
714
#ifdef O_CLOEXEC
715
O_CLOEXEC
716
#else /* not O_CLOEXEC */
717
0
718
#endif /* not O_CLOEXEC */
719
);
720
}
721
if(dir_fd == -1){
722
perror("Could not open plugin dir");
723
exitstatus = EXIT_FAILURE;
724
goto fallback;
725
}
726
727
#ifndef O_CLOEXEC
728
/* Set the FD_CLOEXEC flag on the directory */
729
ret = set_cloexec_flag(dir_fd);
730
if(ret < 0){
731
perror("set_cloexec_flag");
732
TEMP_FAILURE_RETRY(close(dir_fd));
733
exitstatus = EXIT_FAILURE;
734
goto fallback;
735
}
736
#endif /* O_CLOEXEC */
737
738
dir = fdopendir(dir_fd);
739
if(dir == NULL){
740
perror("Could not open plugin dir");
741
TEMP_FAILURE_RETRY(close(dir_fd));
742
exitstatus = EXIT_FAILURE;
743
goto fallback;
400
744
}
401
745
}
402
746
403
747
FD_ZERO(&rfds_all);
404
748
749
/* Read and execute any executable in the plugin directory*/
405
750
while(true){
406
dirst = readdir(dir);
751
do {
752
dirst = readdir(dir);
753
} while(dirst == NULL and errno == EINTR);
407
754
408
// All directory entries have been processed
755
/* All directory entries have been processed */
409
756
if(dirst == NULL){
410
if (errno == EBADF){
757
if(errno == EBADF){
411
758
perror("readdir");
412
759
exitstatus = EXIT_FAILURE;
413
goto end;
760
goto fallback;
414
761
}
415
762
break;
416
763
}
417
764
418
765
d_name_len = strlen(dirst->d_name);
419
766
420
// Ignore dotfiles, backup files and other junk
767
/* Ignore dotfiles, backup files and other junk */
421
768
{
422
769
bool bad_name = false;
423
770
425
772
426
773
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
427
774
".dpkg-old",
775
".dpkg-bak",
428
776
".dpkg-divert", NULL };
429
777
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
430
778
size_t pre_len = strlen(*pre);
438
786
break;
439
787
}
440
788
}
441
442
789
if(bad_name){
443
790
continue;
444
791
}
445
446
792
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
447
793
size_t suf_len = strlen(*suf);
448
794
if((d_name_len >= suf_len)
462
808
}
463
809
}
464
810
465
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
466
if (filename == NULL){
467
perror("malloc");
811
char *filename;
812
if(plugindir == NULL){
813
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
814
dirst->d_name));
815
} else {
816
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
817
plugindir,
818
dirst->d_name));
819
}
820
if(ret < 0){
821
perror("asprintf");
468
822
continue;
469
823
}
470
strcpy(filename, plugindir); /* Spurious warning */
471
strcat(filename, "/"); /* Spurious warning */
472
strcat(filename, dirst->d_name); /* Spurious warning */
473
824
474
ret = stat(filename, &st);
475
if (ret == -1){
825
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
826
if(ret == -1){
476
827
perror("stat");
477
828
free(filename);
478
829
continue;
479
830
}
480
831
481
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
832
/* Ignore non-executable files */
833
if(not S_ISREG(st.st_mode)
834
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
482
835
if(debug){
483
836
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
484
837
" with bad type or mode\n", filename);
486
839
free(filename);
487
840
continue;
488
841
}
489
if(getplugin(dirst->d_name, &plugin_list)->disabled){
842
843
plugin *p = getplugin(dirst->d_name);
844
if(p == NULL){
845
perror("getplugin");
846
free(filename);
847
continue;
848
}
849
if(p->disabled){
490
850
if(debug){
491
851
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
492
852
dirst->d_name);
494
854
free(filename);
495
855
continue;
496
856
}
497
plugin *p = getplugin(dirst->d_name, &plugin_list);
498
857
{
499
858
/* Add global arguments to argument list for this plugin */
500
plugin *g = getplugin(NULL, &plugin_list);
501
for(char **a = g->argv + 1; *a != NULL; a++){
502
addargument(p, *a);
503
}
504
}
505
int pipefd[2];
506
ret = pipe(pipefd);
507
if (ret == -1){
859
plugin *g = getplugin(NULL);
860
if(g != NULL){
861
for(char **a = g->argv + 1; *a != NULL; a++){
862
if(not add_argument(p, *a)){
863
perror("add_argument");
864
}
865
}
866
/* Add global environment variables */
867
for(char **e = g->environ; *e != NULL; e++){
868
if(not add_environment(p, *e, false)){
869
perror("add_environment");
870
}
871
}
872
}
873
}
874
/* If this plugin has any environment variables, we will call
875
using execve and need to duplicate the environment from this
876
process, too. */
877
if(p->environ[0] != NULL){
878
for(char **e = environ; *e != NULL; e++){
879
if(not add_environment(p, *e, false)){
880
perror("add_environment");
881
}
882
}
883
}
884
885
int pipefd[2];
886
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
887
if(ret == -1){
508
888
perror("pipe");
509
889
exitstatus = EXIT_FAILURE;
510
goto end;
890
goto fallback;
511
891
}
892
/* Ask OS to automatic close the pipe on exec */
512
893
ret = set_cloexec_flag(pipefd[0]);
513
894
if(ret < 0){
514
895
perror("set_cloexec_flag");
515
896
exitstatus = EXIT_FAILURE;
516
goto end;
897
goto fallback;
517
898
}
518
899
ret = set_cloexec_flag(pipefd[1]);
519
900
if(ret < 0){
520
901
perror("set_cloexec_flag");
521
902
exitstatus = EXIT_FAILURE;
522
goto end;
903
goto fallback;
523
904
}
524
905
/* Block SIGCHLD until process is safely in process list */
525
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
906
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
907
&sigchld_action.sa_mask,
908
NULL));
526
909
if(ret < 0){
527
910
perror("sigprocmask");
528
911
exitstatus = EXIT_FAILURE;
529
goto end;
912
goto fallback;
530
913
}
531
// Starting a new process to be watched
532
pid_t pid = fork();
914
/* Starting a new process to be watched */
915
pid_t pid;
916
do {
917
pid = fork();
918
} while(pid == -1 and errno == EINTR);
533
919
if(pid == -1){
534
920
perror("fork");
535
921
exitstatus = EXIT_FAILURE;
536
goto end;
922
goto fallback;
537
923
}
538
924
if(pid == 0){
539
925
/* this is the child process */
542
928
perror("sigaction");
543
929
_exit(EXIT_FAILURE);
544
930
}
545
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
931
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
546
932
if(ret < 0){
547
933
perror("sigprocmask");
548
934
_exit(EXIT_FAILURE);
549
935
}
550
936
551
937
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
552
938
if(ret == -1){
553
939
perror("dup2");
559
945
above and must now close it manually here. */
560
946
closedir(dir);
561
947
}
562
if(execv(filename, p->argv) < 0){
563
perror("execv");
564
_exit(EXIT_FAILURE);
948
if(p->environ[0] == NULL){
949
if(execv(filename, p->argv) < 0){
950
perror("execv");
951
_exit(EXIT_FAILURE);
952
}
953
} else {
954
if(execve(filename, p->argv, p->environ) < 0){
955
perror("execve");
956
_exit(EXIT_FAILURE);
957
}
565
958
}
566
959
/* no return */
567
960
}
568
/* parent process */
961
/* Parent process */
962
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
963
pipe */
569
964
free(filename);
570
close(pipefd[1]); /* close unused write end of pipe */
571
process *new_process = malloc(sizeof(process));
572
if (new_process == NULL){
573
perror("malloc");
574
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
965
plugin *new_plugin = getplugin(dirst->d_name);
966
if(new_plugin == NULL){
967
perror("getplugin");
968
ret = (int)(TEMP_FAILURE_RETRY
969
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
970
NULL)));
575
971
if(ret < 0){
576
perror("sigprocmask");
972
perror("sigprocmask");
577
973
}
578
974
exitstatus = EXIT_FAILURE;
579
goto end;
975
goto fallback;
580
976
}
581
977
582
*new_process = (struct process){ .pid = pid,
583
.fd = pipefd[0],
584
.next = process_list };
585
// List handling
586
process_list = new_process;
978
new_plugin->pid = pid;
979
new_plugin->fd = pipefd[0];
980
587
981
/* Unblock SIGCHLD so signal handler can be run if this process
588
982
has already completed */
589
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
983
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
984
&sigchld_action.sa_mask,
985
NULL));
590
986
if(ret < 0){
591
987
perror("sigprocmask");
592
988
exitstatus = EXIT_FAILURE;
593
goto end;
594
}
595
596
FD_SET(new_process->fd, &rfds_all);
597
598
if (maxfd < new_process->fd){
599
maxfd = new_process->fd;
600
}
601
602
}
603
604
/* Free the plugin list */
605
for(plugin *next; plugin_list != NULL; plugin_list = next){
606
next = plugin_list->next;
607
free(plugin_list->argv);
608
free(plugin_list);
609
}
610
611
closedir(dir);
989
goto fallback;
990
}
991
992
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
993
-Wconversion */
994
995
if(maxfd < new_plugin->fd){
996
maxfd = new_plugin->fd;
997
}
998
}
999
1000
TEMP_FAILURE_RETRY(closedir(dir));
612
1001
dir = NULL;
613
614
if (process_list == NULL){
615
fprintf(stderr, "No plugin processes started. Incorrect plugin"
616
" directory?\n");
617
process_list = NULL;
1002
free_plugin(getplugin(NULL));
1003
1004
for(plugin *p = plugin_list; p != NULL; p = p->next){
1005
if(p->pid != 0){
1006
break;
1007
}
1008
if(p->next == NULL){
1009
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1010
" directory?\n");
1011
free_plugin_list();
1012
}
618
1013
}
619
while(process_list){
1014
1015
/* Main loop while running plugins exist */
1016
while(plugin_list){
620
1017
fd_set rfds = rfds_all;
621
1018
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
622
if (select_ret == -1){
1019
if(select_ret == -1 and errno != EINTR){
623
1020
perror("select");
624
1021
exitstatus = EXIT_FAILURE;
625
goto end;
1022
goto fallback;
626
1023
}
627
1024
/* OK, now either a process completed, or something can be read
628
1025
from one of them */
629
for(process *proc = process_list; proc ; proc = proc->next){
1026
for(plugin *proc = plugin_list; proc != NULL;){
630
1027
/* Is this process completely done? */
631
if(proc->eof and proc->completed){
1028
if(proc->completed and proc->eof){
632
1029
/* Only accept the plugin output if it exited cleanly */
633
1030
if(not WIFEXITED(proc->status)
634
1031
or WEXITSTATUS(proc->status) != 0){
635
1032
/* Bad exit by plugin */
1033
636
1034
if(debug){
637
1035
if(WIFEXITED(proc->status)){
638
fprintf(stderr, "Plugin %u exited with status %d\n",
639
(unsigned int) (proc->pid),
1036
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1037
" status %d\n", proc->name,
1038
(intmax_t) (proc->pid),
640
1039
WEXITSTATUS(proc->status));
641
} else if(WIFSIGNALED(proc->status)) {
642
fprintf(stderr, "Plugin %u killed by signal %d\n",
643
(unsigned int) (proc->pid),
644
WTERMSIG(proc->status));
1040
} else if(WIFSIGNALED(proc->status)){
1041
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1042
" signal %d: %s\n", proc->name,
1043
(intmax_t) (proc->pid),
1044
WTERMSIG(proc->status),
1045
strsignal(WTERMSIG(proc->status)));
645
1046
} else if(WCOREDUMP(proc->status)){
646
fprintf(stderr, "Plugin %d dumped core\n",
647
(unsigned int) (proc->pid));
1047
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1048
" core\n", proc->name, (intmax_t) (proc->pid));
648
1049
}
649
1050
}
1051
650
1052
/* Remove the plugin */
651
FD_CLR(proc->fd, &rfds_all);
1053
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1054
-Wconversion */
1055
652
1056
/* Block signal while modifying process_list */
653
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1057
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1058
(SIG_BLOCK,
1059
&sigchld_action.sa_mask,
1060
NULL));
654
1061
if(ret < 0){
655
1062
perror("sigprocmask");
656
1063
exitstatus = EXIT_FAILURE;
657
goto end;
658
}
659
/* Delete this process entry from the list */
660
if(process_list == proc){
661
/* First one - simple */
662
process_list = proc->next;
663
} else {
664
/* Second one or later */
665
for(process *p = process_list; p != NULL; p = p->next){
666
if(p->next == proc){
667
p->next = proc->next;
668
break;
669
}
670
}
671
}
1064
goto fallback;
1065
}
1066
1067
plugin *next_plugin = proc->next;
1068
free_plugin(proc);
1069
proc = next_plugin;
1070
672
1071
/* We are done modifying process list, so unblock signal */
673
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
674
NULL);
1072
ret = (int)(TEMP_FAILURE_RETRY
1073
(sigprocmask(SIG_UNBLOCK,
1074
&sigchld_action.sa_mask, NULL)));
675
1075
if(ret < 0){
676
1076
perror("sigprocmask");
677
}
678
free(proc->buffer);
679
free(proc);
680
/* We deleted this process from the list, so we can't go
681
proc->next. Therefore, start over from the beginning of
682
the process list */
683
break;
1077
exitstatus = EXIT_FAILURE;
1078
goto fallback;
1079
}
1080
1081
if(plugin_list == NULL){
1082
break;
1083
}
1084
1085
continue;
684
1086
}
1087
685
1088
/* This process exited nicely, so print its buffer */
686
687
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1089
1090
bool bret = print_out_password(proc->buffer,
1091
proc->buffer_length);
688
1092
if(not bret){
689
1093
perror("print_out_password");
690
1094
exitstatus = EXIT_FAILURE;
691
1095
}
692
goto end;
1096
goto fallback;
693
1097
}
1098
694
1099
/* This process has not completed. Does it have any output? */
695
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1100
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1101
warning from
1102
-Wconversion */
696
1103
/* This process had nothing to say at this time */
1104
proc = proc->next;
697
1105
continue;
698
1106
}
699
1107
/* Before reading, make the process' data buffer large enough */
700
1108
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
701
1109
proc->buffer = realloc(proc->buffer, proc->buffer_size
702
1110
+ (size_t) BUFFER_SIZE);
703
if (proc->buffer == NULL){
1111
if(proc->buffer == NULL){
704
1112
perror("malloc");
705
1113
exitstatus = EXIT_FAILURE;
706
goto end;
1114
goto fallback;
707
1115
}
708
1116
proc->buffer_size += BUFFER_SIZE;
709
1117
}
710
1118
/* Read from the process */
711
ret = read(proc->fd, proc->buffer + proc->buffer_length,
712
BUFFER_SIZE);
713
if(ret < 0){
1119
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1120
proc->buffer
1121
+ proc->buffer_length,
1122
BUFFER_SIZE));
1123
if(sret < 0){
714
1124
/* Read error from this process; ignore the error */
1125
proc = proc->next;
715
1126
continue;
716
1127
}
717
if(ret == 0){
1128
if(sret == 0){
718
1129
/* got EOF */
719
1130
proc->eof = true;
720
1131
} else {
721
proc->buffer_length += (size_t) ret;
1132
proc->buffer_length += (size_t) sret;
722
1133
}
723
1134
}
724
1135
}
725
726
727
end:
728
729
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
730
/* Fallback if all plugins failed, none are found or an error occured */
1136
1137
1138
fallback:
1139
1140
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1141
/* Fallback if all plugins failed, none are found or an error
1142
occured */
731
1143
bool bret;
732
1144
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
733
1145
char *passwordbuffer = getpass("Password: ");
734
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1146
size_t len = strlen(passwordbuffer);
1147
/* Strip trailing newline */
1148
if(len > 0 and passwordbuffer[len-1] == '\n'){
1149
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1150
len--;
1151
}
1152
bret = print_out_password(passwordbuffer, len);
735
1153
if(not bret){
736
1154
perror("print_out_password");
737
1155
exitstatus = EXIT_FAILURE;
738
goto end;
739
1156
}
740
1157
}
741
1158
742
1159
/* Restore old signal handler */
743
sigaction(SIGCHLD, &old_sigchld_action, NULL);
744
745
free(plus_argv);
746
747
/* Free the plugin list */
748
for(plugin *next; plugin_list != NULL; plugin_list = next){
749
next = plugin_list->next;
750
free(plugin_list->argv);
751
free(plugin_list);
1160
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1161
if(ret == -1){
1162
perror("sigaction");
1163
exitstatus = EXIT_FAILURE;
1164
}
1165
1166
if(custom_argv != NULL){
1167
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1168
free(*arg);
1169
}
1170
free(custom_argv);
752
1171
}
753
1172
754
1173
if(dir != NULL){
755
1174
closedir(dir);
756
1175
}
757
1176
758
/* Free the process list and kill the processes */
759
for(process *next; process_list != NULL; process_list = next){
760
next = process_list->next;
761
close(process_list->fd);
762
ret = kill(process_list->pid, SIGTERM);
763
if(ret == -1 and errno != ESRCH){
764
/* set-uid proccesses migth not get closed */
765
perror("kill");
1177
/* Kill the processes */
1178
for(plugin *p = plugin_list; p != NULL; p = p->next){
1179
if(p->pid != 0){
1180
close(p->fd);
1181
ret = kill(p->pid, SIGTERM);
1182
if(ret == -1 and errno != ESRCH){
1183
/* Set-uid proccesses might not get closed */
1184
perror("kill");
1185
}
766
1186
}
767
free(process_list->buffer);
768
free(process_list);
769
1187
}
770
1188
771
1189
/* Wait for any remaining child processes to terminate */
772
do{
1190
do {
773
1191
ret = wait(NULL);
774
1192
} while(ret >= 0);
775
1193
if(errno != ECHILD){
776
1194
perror("wait");
777
1195
}
778
1196
1197
free_plugin_list();
1198
1199
free(plugindir);
1200
free(argfile);
1201
779
1202
return exitstatus;
780
1203
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0