diff options
Diffstat (limited to 'src/securetty.c')
-rw-r--r-- | src/securetty.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/src/securetty.c b/src/securetty.c deleted file mode 100644 index 9ec8e7ef..00000000 --- a/src/securetty.c +++ /dev/null @@ -1,111 +0,0 @@ -/* - * Copyright (c) 2008 Red Hat, Inc. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - * - */ - -#include <errno.h> -#include <fcntl.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <syslog.h> -#include <unistd.h> - -#include <sys/types.h> -#include <sys/stat.h> - -void alarm_handler(int num) { - return; -} - -int open_and_lock_securetty() { - int fd; - struct flock lock; - struct sigaction act, oldact; - - lock.l_type = F_WRLCK; - lock.l_whence = SEEK_SET; - lock.l_start = 0; - lock.l_len = 0; - - fd = open("/etc/securetty", O_RDWR); - if (fd == -1) { - syslog(LOG_ERR, "Couldn't open /etc/securetty: %s",strerror(errno)); - return -1; - } - act.sa_handler = alarm_handler; - act.sa_flags = 0; - sigaction(SIGALRM, &act, &oldact); - alarm(2); - while (fcntl(fd, F_SETLKW, &lock) == -1) { - if (errno == EINTR) { - syslog(LOG_ERR, "Couldn't lock /etc/securetty: Timeout exceeded"); - } else { - syslog(LOG_ERR, "Couldn't lock /etc/securetty: %s",strerror(errno)); - } - return -1; - } - alarm(0); - sigaction(SIGALRM, &oldact, NULL); - return fd; -} - -int rewrite_securetty(char *terminal) { - int fd; - char *buf, *pos; - struct stat sbuf; - - fd = open_and_lock_securetty(); - if (fd == -1) - return 1; - if (fstat(fd, &sbuf) == -1) { - close(fd); - syslog(LOG_ERR, "Couldn't stat /etc/securetty: %s",strerror(errno)); - return 1; - } - buf = malloc(sbuf.st_size + 1); - if (read(fd, buf, sbuf.st_size) != sbuf.st_size) { - close(fd); - syslog(LOG_ERR, "Couldn't read /etc/securetty: %s",strerror(errno)); - return 1; - } - if (!strncmp(buf,terminal,strlen(terminal)) && buf[strlen(terminal)] == '\n') - goto out_ok; - if ((pos = strstr(buf, terminal))) { - if (pos[strlen(terminal)] == '\n' && *(pos-1) == '\n') - goto out_ok; - } - if (lseek(fd, 0, SEEK_END) == -1) { - close(fd); - syslog(LOG_ERR, "Couldn't seek to end of /etc/securetty: %s",strerror(errno)); - return 1; - } - write(fd, terminal, strlen(terminal)); - write(fd, "\n", 1); -out_ok: - close(fd); - return 0; -} - -int main(int argc, char **argv) { - if (argc < 2 ) { - fprintf(stderr, "Usage: securetty <device>\n"); - exit(1); - } - openlog("securetty", LOG_CONS, LOG_DAEMON); - return rewrite_securetty(argv[1]); -} |