int fuse_mnt_umount(const char *progname, const char *mnt, int lazy)
{
int res;
int status;
sigset_t blockmask;
sigset_t oldmask;
if (!mtab_needs_update(mnt)) {
res = umount2(mnt, lazy ? 2 : 0);
if (res == -1)
fprintf(stderr, "%s: failed to unmount %s: %s\n",
progname, mnt, strerror(errno));
return res;
}
sigemptyset(&blockmask);
sigaddset(&blockmask, SIGCHLD);
res = sigprocmask(SIG_BLOCK, &blockmask, &oldmask);
if (res == -1) {
fprintf(stderr, "%s: sigprocmask: %s\n", progname, strerror(errno));
return -1;
}
res = fork();
if (res == -1) {
fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
goto out_restore;
}
if (res == 0) {
sigprocmask(SIG_SETMASK, &oldmask, NULL);
setuid(geteuid());
execl("/bin/umount", "/bin/umount", "-i", mnt,
lazy ? "-l" : NULL, NULL);
fprintf(stderr, "%s: failed to execute /bin/umount: %s\n",
progname, strerror(errno));
exit(1);
}
res = waitpid(res, &status, 0);
if (res == -1)
fprintf(stderr, "%s: waitpid: %s\n", progname, strerror(errno));
if (status != 0)
res = -1;
out_restore:
sigprocmask(SIG_SETMASK, &oldmask, NULL);
return res;
}
int fuse_mnt_add_mount(const char *progname, const char *fsname,
const char *mnt, const char *type, const char *opts)
{
int res;
if (!mtab_needs_update(mnt))
return 0;
res = fork();
if (res == -1) {
fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
return 0;
}
if (res == 0) {
char templ[] = "/tmp/fusermountXXXXXX";
char *tmp;
if (setuid(geteuid()))
fprintf(stderr, "%s: failed to setuid : %s\n", progname,
strerror(errno));
/*
* hide in a directory, where mount isn't able to resolve
* fsname as a valid path
*/
tmp = mkdtemp(templ);
if (!tmp) {
fprintf(stderr, "%s: failed to create temporary directory\n",
progname);
exit(1);
}
if (chdir(tmp)) {
fprintf(stderr, "%s: failed to chdir to %s: %s\n",
progname, tmp, strerror(errno));
exit(1);
}
rmdir(tmp);
execl("/bin/mount", "/bin/mount", "-i", "-f", "-t", type, "-o", opts,
fsname, mnt, NULL);
fprintf(stderr, "%s: failed to execute /bin/mount: %s\n", progname,
strerror(errno));
exit(1);
}
return 0;
}
int fuse_mnt_umount(const char *progname, const char *mnt, int lazy)
{
int res;
int status;
if (!mtab_needs_update(mnt)) {
res = umount2(mnt, lazy ? 2 : 0);
if (res == -1)
fprintf(stderr, "%s: failed to unmount %s: %s\n", progname,
mnt, strerror(errno));
return res;
}
res = fork();
if (res == -1) {
fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
return -1;
}
if (res == 0) {
if (setuid(geteuid()))
fprintf(stderr, "%s: failed to setuid : %s\n", progname,
strerror(errno));
execl("/bin/umount", "/bin/umount", "-i", mnt, lazy ? "-l" : NULL,
NULL);
fprintf(stderr, "%s: failed to execute /bin/umount: %s\n", progname,
strerror(errno));
exit(1);
}
res = waitpid(res, &status, 0);
if (res == -1) {
fprintf(stderr, "%s: waitpid: %s\n", progname, strerror(errno));
return -1;
}
if (status != 0)
return -1;
return 0;
}
/* FUSE: called add_mount_legacy(); R.I.P. as of cbd3a2a8 */
int
fuse_mnt_add_mount (const char *progname, const char *fsname,
const char *mnt, const char *type, const char *opts)
{
int res;
int status;
sigset_t blockmask;
sigset_t oldmask;
if (!mtab_needs_update (mnt))
return 0;
sigemptyset (&blockmask);
sigaddset (&blockmask, SIGCHLD);
res = sigprocmask (SIG_BLOCK, &blockmask, &oldmask);
if (res == -1) {
GFFUSE_LOGERR ("%s: sigprocmask: %s",
progname, strerror (errno));
return -1;
}
res = fork ();
if (res == -1) {
GFFUSE_LOGERR ("%s: fork: %s", progname, strerror (errno));
goto out_restore;
}
if (res == 0) {
char templ[] = "/tmp/fusermountXXXXXX";
char *tmp;
sigprocmask (SIG_SETMASK, &oldmask, NULL);
setuid (geteuid ());
/*
* hide in a directory, where mount isn't able to resolve
* fsname as a valid path
*/
tmp = mkdtemp (templ);
if (!tmp) {
GFFUSE_LOGERR ("%s: failed to create temporary directory",
progname);
exit (1);
}
if (chdir (tmp)) {
GFFUSE_LOGERR ("%s: failed to chdir to %s: %s",
progname, tmp, strerror (errno));
exit (1);
}
rmdir (tmp);
execl (_PATH_MOUNT, _PATH_MOUNT, "-i", "-f", "-t", type,
"-o", opts, fsname, mnt, NULL);
GFFUSE_LOGERR ("%s: failed to execute %s: %s",
progname, _PATH_MOUNT, strerror (errno));
exit (1);
}
res = waitpid (res, &status, 0);
if (res == -1)
GFFUSE_LOGERR ("%s: waitpid: %s", progname, strerror (errno));
res = (res != -1 && status == 0) ? 0 : -1;
out_restore:
sigprocmask (SIG_SETMASK, &oldmask, NULL);
return res;
}
/* FUSE: to support some changes that were reverted since
* then, it was split in two (fuse_mnt_umount() and
* exec_umount()); however the actual code is same as here
* since 0197ce40
*/
int
fuse_mnt_umount (const char *progname, const char *abs_mnt,
const char *rel_mnt, int lazy)
{
int res;
int status;
sigset_t blockmask;
sigset_t oldmask;
if (!mtab_needs_update (abs_mnt)) {
res = umount2 (rel_mnt, lazy ? 2 : 0);
if (res == -1)
GFFUSE_LOGERR ("%s: failed to unmount %s: %s",
progname, abs_mnt, strerror (errno));
return res;
}
sigemptyset (&blockmask);
sigaddset (&blockmask, SIGCHLD);
res = sigprocmask (SIG_BLOCK, &blockmask, &oldmask);
if (res == -1) {
GFFUSE_LOGERR ("%s: sigprocmask: %s", progname,
strerror (errno));
return -1;
}
res = fork ();
if (res == -1) {
GFFUSE_LOGERR ("%s: fork: %s", progname, strerror (errno));
goto out_restore;
}
if (res == 0) {
sigprocmask (SIG_SETMASK, &oldmask, NULL);
res = setuid (geteuid ());
if (res != 0) {
GFFUSE_LOGERR ("%s: setuid: %s", progname, strerror (errno));
exit (1);
}
#ifdef GF_LINUX_HOST_OS
execl ("/bin/umount", "/bin/umount", "-i", rel_mnt,
lazy ? "-l" : NULL, NULL);
GFFUSE_LOGERR ("%s: failed to execute /bin/umount: %s",
progname, strerror (errno));
#elif __NetBSD__
/* exitting the filesystem causes the umount */
exit (0);
#else
execl ("/sbin/umount", "/sbin/umount", "-f", rel_mnt, NULL);
GFFUSE_LOGERR ("%s: failed to execute /sbin/umount: %s",
progname, strerror (errno));
#endif /* GF_LINUX_HOST_OS */
exit (1);
}
res = waitpid (res, &status, 0);
if (res == -1)
GFFUSE_LOGERR ("%s: waitpid: %s", progname, strerror (errno));
if (status != 0)
res = -1;
out_restore:
sigprocmask (SIG_SETMASK, &oldmask, NULL);
return res;
}
