static void mount_version(void)
{
int pid = fork();
if (!pid) {
const char *argv[] = { FUSERMOUNT_PROG, "--version", NULL };
exec_fusermount(argv);
_exit(1);
} else if (pid != -1)
waitpid(pid, NULL, 0);
}
void fuse_kern_unmount(const char *mountpoint, int fd)
{
int res;
int pid;
if (!mountpoint)
return;
if (fd != -1) {
struct pollfd pfd;
pfd.fd = fd;
pfd.events = 0;
res = poll(&pfd, 1, 0);
/* Need to close file descriptor, otherwise synchronous umount
would recurse into filesystem, and deadlock.
Caller expects fuse_kern_unmount to close the fd, so close it
anyway. */
close(fd);
/* If file poll returns POLLERR on the device file descriptor,
then the filesystem is already unmounted */
if (res == 1 && (pfd.revents & POLLERR))
return;
}
if (geteuid() == 0) {
fuse_mnt_umount("fuse", mountpoint, mountpoint, 1);
return;
}
res = umount2(mountpoint, 2);
if (res == 0)
return;
pid = fork();
if(pid == -1)
return;
if(pid == 0) {
const char *argv[] = { FUSERMOUNT_PROG, "-u", "-q", "-z",
"--", mountpoint, NULL };
exec_fusermount(argv);
_exit(1);
}
waitpid(pid, NULL, 0);
}
void fuse_kern_unmount(const char *mountpoint, int fd)
{
int res;
int pid;
if (!mountpoint)
return;
if (fd != -1) {
struct pollfd pfd;
pfd.fd = fd;
pfd.events = 0;
res = poll(&pfd, 1, 0);
/* If file poll returns POLLERR on the device file descriptor,
then the filesystem is already unmounted */
if (res == 1 && (pfd.revents & POLLERR))
return;
}
if (geteuid() == 0) {
fuse_mnt_umount("fuse", mountpoint, 1);
return;
}
res = umount2(mountpoint, 2);
if (res == 0)
return;
pid = fork();
if(pid == -1)
return;
if(pid == 0) {
const char *argv[] =
{ FUSERMOUNT_PROG, "-u", "-q", "-z", "--", mountpoint, NULL };
exec_fusermount(argv);
_exit(1);
}
waitpid(pid, NULL, 0);
}
static int fuse_mount_fusermount(const char *mountpoint, const char *opts,
int quiet)
{
int fds[2], pid;
int res;
int rv;
if (!mountpoint) {
fprintf(stderr, "fuse: missing mountpoint\n");
return -1;
}
res = socketpair(PF_UNIX, SOCK_STREAM, 0, fds);
if(res == -1) {
perror("fuse: socketpair() failed");
return -1;
}
pid = fork();
if(pid == -1) {
perror("fuse: fork() failed");
close(fds[0]);
close(fds[1]);
return -1;
}
if(pid == 0) {
char env[10];
const char *argv[32];
int a = 0;
if (quiet) {
int fd = open("/dev/null", O_RDONLY);
dup2(fd, 1);
dup2(fd, 2);
}
argv[a++] = FUSERMOUNT_PROG;
if (opts) {
argv[a++] = "-o";
argv[a++] = opts;
}
argv[a++] = "--";
argv[a++] = mountpoint;
argv[a++] = NULL;
close(fds[1]);
fcntl(fds[0], F_SETFD, 0);
snprintf(env, sizeof(env), "%i", fds[0]);
setenv(FUSE_COMMFD_ENV, env, 1);
exec_fusermount(argv);
perror("fuse: failed to exec fusermount");
_exit(1);
}
close(fds[0]);
rv = receive_fd(fds[1]);
close(fds[1]);
waitpid(pid, NULL, 0); /* bury zombie */
return rv;
}
