1
/* -*- coding: utf-8 -*- */
3
* Usplash - Read a password from usplash and output it
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
13
* This program is distributed in the hope that it will be useful, but
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
* General Public License for more details.
18
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
22
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
23
* <https://www.fukt.bsnet.se/~teddy/>.
26
1
#define _GNU_SOURCE /* asprintf() */
27
2
#include <signal.h> /* sig_atomic_t, struct sigaction,
28
3
sigemptyset(), sigaddset(), SIGINT,
37
12
#include <stddef.h> /* NULL */
38
13
#include <string.h> /* strlen(), memcmp() */
39
#include <stdio.h> /* asprintf(), perror(), sscanf() */
14
#include <stdio.h> /* asprintf(), perror() */
40
15
#include <unistd.h> /* close(), write(), readlink(),
41
16
read(), STDOUT_FILENO, sleep(),
42
17
fork(), setuid(), geteuid(),
43
18
setsid(), chdir(), dup2(),
44
19
STDERR_FILENO, execv() */
45
#include <stdlib.h> /* free(), EXIT_FAILURE, realloc(),
46
EXIT_SUCCESS, malloc(), _exit() */
20
#include <stdlib.h> /* free(), EXIT_FAILURE, strtoul(),
21
realloc(), EXIT_SUCCESS, malloc(),
47
23
#include <stdlib.h> /* getenv() */
48
24
#include <dirent.h> /* opendir(), readdir(), closedir() */
49
25
#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK */
93
69
size_t written = 0;
95
70
while(not interrupted_by_signal and written < cmd_line_len){
96
sret = write(fifo_fd, cmd_line + written,
97
cmd_line_len - written);
71
ret = write(fifo_fd, cmd_line + written,
72
cmd_line_len - written);
99
74
if(errno != EINTR or interrupted_by_signal){
169
144
for(struct dirent *proc_ent = readdir(proc_dir);
170
145
proc_ent != NULL;
171
146
proc_ent = readdir(proc_dir)){
173
/* In the GNU C library, pid_t is always int */
174
ret = sscanf(proc_ent->d_name, "%d", &pid);
147
pid_t pid = (pid_t) strtoul(proc_ent->d_name, NULL, 10);
176
149
/* Not a process */
214
183
sret = readlink(exe_link, exe_target, sizeof(exe_target));
217
189
if((sret == ((ssize_t)sizeof(exe_target)-1))
218
190
and (memcmp(usplash_name, exe_target,