int init_file_locking(struct locking_type *locking, struct cmd_context *cmd,
int suppress_messages)
{
int r;
const char *locking_dir;
init_flock(cmd);
locking->lock_resource = _file_lock_resource;
locking->reset_locking = _reset_file_locking;
locking->fin_locking = _fin_file_locking;
locking->flags = 0;
/* Get lockfile directory from config file */
locking_dir = find_config_tree_str(cmd, global_locking_dir_CFG, NULL);
if (strlen(locking_dir) >= sizeof(_lock_dir)) {
log_error("Path for locking_dir %s is invalid.", locking_dir);
return 0;
}
strcpy(_lock_dir, locking_dir);
(void) dm_prepare_selinux_context(_lock_dir, S_IFDIR);
r = dm_create_dir(_lock_dir);
(void) dm_prepare_selinux_context(NULL, 0);
if (!r)
return 0;
/* Trap a read-only file system */
if ((access(_lock_dir, R_OK | W_OK | X_OK) == -1) && (errno == EROFS))
return 0;
return 1;
}
int main(int argc, char **argv)
{
struct flock fl;
char *device_name;
int fd, c, f_opt = 0, do_rdwr = 0, end_immediately = 0;
int flags = O_NONBLOCK|O_LARGEFILE;
progname = argv[0];
/* ts A70417: added -w , -r , -i */
while ((c = getopt (argc, argv, "feirw")) != EOF) {
switch (c) {
case 'e':
flags |= O_EXCL;
break;
case 'f':
f_opt++;
break;
case 'i':
end_immediately = 1;
break;
case 'r':
do_rdwr = 0;
break;
case 'w':
do_rdwr = 1;
break;
case '?':
usage();
exit(1);
}
}
if (optind == argc)
usage();
device_name = argv[optind++];
/* ts A70417 : made read-write adjustable independently of f_opt */
if (do_rdwr) {
flags |= O_RDWR;
printf("Using O_RDWR\n");
} else {
flags |= O_RDONLY;
printf("Using O_RDONLY\n");
}
if (flags & O_EXCL)
printf("Trying to open %s with O_EXCL ...\n", device_name);
fd = open(device_name, flags, 0);
if (fd < 0) {
perror("open");
printf("failed\n");
exit(1);
}
if (flags & O_EXCL)
printf("succeeded\n");
if (f_opt) {
init_flock(&fl, do_rdwr);
if (fcntl(fd, F_GETLK, &fl) < 0) {
perror("fcntl: F_GETLK: ");
exit(1);
}
printf("fcntl lock apparently %sLOCKED\n",
(fl.l_type == F_UNLCK) ? "NOT " : "");
init_flock(&fl, do_rdwr);
printf("Trying to grab fcntl lock...\n");
if (fcntl(fd, F_SETLK, &fl) < 0) {
perror("fcntl: F_SETLK: ");
printf("failed\n");
exit(1);
}
printf("succeeded\n");
}
/* ts A70417: added end_immediately */
printf("Holding %s open.\n", device_name);
usleep(100000);
if (end_immediately)
exit(0);
printf("Press ^C to exit.\n");
while (1) {
sleep(300);
}
/* NOTREACHED */
return 0;
}
