3
3
* Splashy - Read a password from splashy and output it
5
* Copyright © 2008-2012 Teddy Hogeborn
6
* Copyright © 2008-2012 Björn Påhlsson
5
* Copyright © 2008-2011 Teddy Hogeborn
6
* Copyright © 2008-2011 Björn Påhlsson
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
29
29
SIG_IGN, kill(), SIGKILL */
30
30
#include <stddef.h> /* NULL */
31
31
#include <stdlib.h> /* getenv() */
32
#include <stdio.h> /* asprintf(), vasprintf(), vprintf(),
32
#include <stdio.h> /* asprintf() */
34
33
#include <stdlib.h> /* EXIT_FAILURE, free(),
36
35
#include <sys/types.h> /* pid_t, DIR, struct dirent,
43
42
sleep(), dup2() STDERR_FILENO,
44
43
STDOUT_FILENO, _exit(),
46
#include <string.h> /* memcmp(), strerror() */
45
#include <string.h> /* memcmp() */
47
46
#include <errno.h> /* errno, EACCES, ENOTDIR, ELOOP,
48
47
ENOENT, ENAMETOOLONG, EMFILE,
49
48
ENFILE, ENOMEM, ENOEXEC, EINVAL,
56
55
#include <sysexits.h> /* EX_OSERR, EX_OSFILE,
58
#include <stdarg.h> /* va_list, va_start(), ... */
60
58
sig_atomic_t interrupted_by_signal = 0;
61
59
int signal_received;
63
/* Function to use when printing errors */
64
__attribute__((format (gnu_printf, 3, 4)))
65
void error_plus(int status, int errnum, const char *formatstring,
71
va_start(ap, formatstring);
72
ret = vasprintf(&text, formatstring, ap);
74
fprintf(stderr, "Mandos plugin %s: ",
75
program_invocation_short_name);
76
vfprintf(stderr, formatstring, ap);
77
fprintf(stderr, ": ");
78
fprintf(stderr, "%s\n", strerror(errnum));
79
error(status, errno, "vasprintf while printing error");
82
fprintf(stderr, "Mandos plugin ");
83
error(status, errnum, "%s", text);
88
61
static void termination_handler(int signum){
89
62
if(interrupted_by_signal){
241
214
sigemptyset(&new_action.sa_mask);
242
215
ret = sigaddset(&new_action.sa_mask, SIGINT);
244
error_plus(0, errno, "sigaddset");
217
error(0, errno, "sigaddset");
245
218
exitstatus = EX_OSERR;
248
221
ret = sigaddset(&new_action.sa_mask, SIGHUP);
250
error_plus(0, errno, "sigaddset");
223
error(0, errno, "sigaddset");
251
224
exitstatus = EX_OSERR;
254
227
ret = sigaddset(&new_action.sa_mask, SIGTERM);
256
error_plus(0, errno, "sigaddset");
229
error(0, errno, "sigaddset");
257
230
exitstatus = EX_OSERR;
260
233
ret = sigaction(SIGINT, NULL, &old_action);
262
error_plus(0, errno, "sigaction");
235
error(0, errno, "sigaction");
263
236
exitstatus = EX_OSERR;
266
239
if(old_action.sa_handler != SIG_IGN){
267
240
ret = sigaction(SIGINT, &new_action, NULL);
269
error_plus(0, errno, "sigaction");
242
error(0, errno, "sigaction");
270
243
exitstatus = EX_OSERR;
274
247
ret = sigaction(SIGHUP, NULL, &old_action);
276
error_plus(0, errno, "sigaction");
249
error(0, errno, "sigaction");
277
250
exitstatus = EX_OSERR;
280
253
if(old_action.sa_handler != SIG_IGN){
281
254
ret = sigaction(SIGHUP, &new_action, NULL);
283
error_plus(0, errno, "sigaction");
256
error(0, errno, "sigaction");
284
257
exitstatus = EX_OSERR;
288
261
ret = sigaction(SIGTERM, NULL, &old_action);
290
error_plus(0, errno, "sigaction");
263
error(0, errno, "sigaction");
291
264
exitstatus = EX_OSERR;
294
267
if(old_action.sa_handler != SIG_IGN){
295
268
ret = sigaction(SIGTERM, &new_action, NULL);
297
error_plus(0, errno, "sigaction");
270
error(0, errno, "sigaction");
298
271
exitstatus = EX_OSERR;
409
382
the real user ID (_mandos) */
410
383
ret = setuid(geteuid());
412
error_plus(0, errno, "setuid");
385
error(0, errno, "setuid");
416
389
ret = chdir("/");
418
error_plus(0, errno, "chdir");
391
error(0, errno, "chdir");
420
393
/* if(fork() != 0){ */
421
394
/* _exit(EXIT_SUCCESS); */
423
396
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace stdout */
425
error_plus(0, errno, "dup2");
398
error(0, errno, "dup2");
429
402
execl("/sbin/splashy", "/sbin/splashy", "boot", (char *)NULL);
432
error_plus(0, errno, "execl");
405
error(0, errno, "execl");
455
428
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
456
429
&signal_action, NULL));
458
error_plus(0, errno, "sigaction");
431
error(0, errno, "sigaction");
461
434
ret = raise(signal_received);
462
435
} while(ret != 0 and errno == EINTR);
464
error_plus(0, errno, "raise");
437
error(0, errno, "raise");
467
440
TEMP_FAILURE_RETRY(pause());