static int unmount_fuse_locked(const char *mnt, int quiet, int lazy)
{
char *copy;
const char *last;
int res;
if (getuid() != 0) {
res = may_unmount(mnt, quiet);
if (res == -1)
return -1;
}
copy = strdup(mnt);
if (copy == NULL) {
fprintf(stderr, "%s: failed to allocate memory\n", progname);
return -1;
}
res = chdir_to_parent(copy, &last);
if (res == -1)
goto out;
res = check_is_mount(last, mnt);
if (res == -1)
goto out;
res = fuse_mnt_umount(progname, mnt, last, lazy);
out:
free(copy);
return res;
}
static int unmount_fuse(const char *mnt, int quiet, int lazy)
{
if (getuid() != 0) {
struct mntent *entp;
FILE *fp;
const char *user = NULL;
char uidstr[32];
unsigned uidlen = 0;
int found;
const char *mtab = _PATH_MOUNTED;
user = get_user_name();
if (user == NULL)
return -1;
fp = setmntent(mtab, "r");
if (fp == NULL) {
fprintf(stderr, "%s: failed to open %s: %s\n", progname, mtab,
strerror(errno));
return -1;
}
uidlen = sprintf(uidstr, "%u", getuid());
found = 0;
while ((entp = getmntent(fp)) != NULL) {
if (!found && strcmp(entp->mnt_dir, mnt) == 0 &&
(strcmp(entp->mnt_type, "fuse") == 0 ||
strcmp(entp->mnt_type, "fuseblk") == 0 ||
strncmp(entp->mnt_type, "fuse.", 5) == 0 ||
strncmp(entp->mnt_type, "fuseblk.", 8) == 0)) {
char *p = strstr(entp->mnt_opts, "user="******"user_id=")) &&
(p == entp->mnt_opts || *(p-1) == ',') &&
strncmp(p + 8, uidstr, uidlen) == 0 &&
(*(p+8+uidlen) == ',' || *(p+8+uidlen) == '\0')) {
found = 1;
break;
}
}
}
endmntent(fp);
if (!found) {
if (!quiet)
fprintf(stderr, "%s: entry for %s not found in %s\n", progname,
mnt, mtab);
return -1;
}
}
return fuse_mnt_umount(progname, mnt, lazy);
}
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 unmount_fuse(const char *mnt, int quiet, int lazy)
{
return fuse_mnt_umount(progname, mnt, mnt, lazy);
}
