/**
* mnt_context_mount:
* @cxt: mount context
*
* High-level, mounts filesystem by mount(2) or fork()+exec(/sbin/mount.type).
*
* This is similar to:
*
* mnt_context_prepare_mount(cxt);
* mnt_context_do_mount(cxt);
* mnt_context_finalize_mount(cxt);
*
* See also mnt_context_disable_helpers().
*
* Note that this function could be called only once. If you want to mount with
* different setting than you have to call mnt_reset_context(). It's NOT enough
* to call mnt_context_reset_status() if you want call this function more than
* once, whole context has to be reseted.
*
* WARNING: non-zero return code does not mean that mount(2) syscall or
* mount.type helper wasn't successfully called.
*
* Check mnt_context_get_status() after error!
*
* Returns: 0 on success;
* >0 in case of mount(2) error (returns syscall errno),
* <0 in case of other errors.
*/
int mnt_context_mount(struct libmnt_context *cxt)
{
int rc;
assert(cxt);
assert(cxt->fs);
assert(cxt->helper_exec_status == 1);
assert(cxt->syscall_status == 1);
rc = mnt_context_prepare_mount(cxt);
if (!rc)
rc = mnt_context_prepare_update(cxt);
if (!rc)
rc = mnt_context_do_mount(cxt);
/* TODO: if mtab update is expected then check if the
* target is really mounted read-write to avoid 'ro' in
* mtab and 'rw' in /proc/mounts.
*/
if (!rc)
rc = mnt_context_update_tabs(cxt);
return rc;
}
static int mount_main(struct libmnt_context *cxt, int argc, char **argv)
{
int rc, c;
struct libmnt_fs *fs;
char *spec = NULL, *mount_point = NULL, *opts = NULL;
static const struct option longopts[] = {
{ "fake", 0, 0, 'f' },
{ "help", 0, 0, 'h' },
{ "no-mtab", 0, 0, 'n' },
{ "read-only", 0, 0, 'r' },
{ "ro", 0, 0, 'r' },
{ "verbose", 0, 0, 'v' },
{ "version", 0, 0, 'V' },
{ "read-write", 0, 0, 'w' },
{ "rw", 0, 0, 'w' },
{ "options", 1, 0, 'o' },
{ "sloppy", 0, 0, 's' },
{ NULL, 0, 0, 0 }
};
mount_config_init(progname);
mnt_context_init_helper(cxt, MNT_ACT_MOUNT, 0);
while ((c = getopt_long(argc, argv, "fhnrVvwo:s", longopts, NULL)) != -1) {
rc = mnt_context_helper_setopt(cxt, c, optarg);
if (rc == 0) /* valid option */
continue;
if (rc < 0) /* error (probably ENOMEM) */
goto err;
/* rc==1 means unknow option */
switch (c) {
case 'V':
printf("%s: ("PACKAGE_STRING")\n", progname);
return EX_SUCCESS;
case 'h':
default:
mount_usage();
return EX_USAGE;
}
}
if (optind < argc)
spec = argv[optind++];
if (optind < argc)
mount_point = argv[optind++];
if (!mount_point) {
nfs_error(_("%s: no mount point provided"), progname);
goto err;
}
if (!spec) {
nfs_error(_("%s: no mount spec provided"), progname);
goto err;
}
if (geteuid() != 0) {
nfs_error(_("%s: not installed setuid - "
"\"user\" NFS mounts not supported."), progname);
goto err;
}
verbose = mnt_context_is_verbose(cxt);
sloppy = mnt_context_is_sloppy(cxt);
nomtab = mnt_context_is_nomtab(cxt);
if (strcmp(progname, "mount.nfs4") == 0)
mnt_context_set_fstype(cxt, "nfs4");
else
mnt_context_set_fstype(cxt, "nfs"); /* default */
rc = mnt_context_set_source(cxt, spec);
if (!rc)
mnt_context_set_target(cxt, mount_point);
if (rc) {
nfs_error(_("%s: failed to set spec or mountpoint: %s"),
progname, strerror(errno));
goto err;
}
mount_point = mnt_resolve_path(mount_point,
mnt_context_get_cache(cxt));
if (chk_mountpoint(mount_point))
goto err;
/*
* Concatenate mount options from the configuration file
*/
fs = mnt_context_get_fs(cxt);
if (fs) {
opts = mnt_fs_strdup_options(fs);
opts = mount_config_opts(spec, mount_point, opts);
mnt_fs_set_options(fs, opts);
}
rc = mnt_context_prepare_mount(cxt);
if (rc) {
nfs_error(_("%s: failed to prepare mount: %s\n"),
progname, strerror(-rc));
goto err;
}
rc = try_mount(cxt, FOREGROUND);
if (rc == EX_BG) {
printf(_("%s: backgrounding \"%s\"\n"),
progname, mnt_context_get_source(cxt));
printf(_("%s: mount options: \"%s\"\n"),
progname, opts);
fflush(stdout);
if (daemon(0, 0)) {
nfs_error(_("%s: failed to start "
"background process: %s\n"),
progname, strerror(errno));
exit(EX_FAIL);
}
rc = try_mount(cxt, BACKGROUND);
if (verbose && rc)
printf(_("%s: giving up \"%s\"\n"),
progname, mnt_context_get_source(cxt));
}
mnt_context_set_syscall_status(cxt, rc == EX_SUCCESS ? 0 : -1);
mnt_context_finalize_mount(cxt); /* mtab update */
return rc;
err:
return EX_FAIL;
}