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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* smbfs umount
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <signal.h>
#include <unistd.h>
#include <kstat.h>
#include <rpc/rpc.h>
#include <sys/mnttab.h>
#include <sys/mount.h>
#include <sys/mntent.h>
#include <errno.h>
#include <locale.h>
#include <fslib.h>
#include <priv_utils.h>
#define RET_OK 0
#define RET_ERR 32
static void pr_err(const char *fmt, ...);
static void usage();
static int smbfs_unmount(char *, int);
static struct extmnttab *mnttab_find();
static char *myname;
static char typename[64];
int
main(int argc, char *argv[])
{
extern int optind;
int c;
int umnt_flag = 0;
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN "SYS_TEST"
#endif
(void) textdomain(TEXT_DOMAIN);
/*
* Normal users are allowed to umount smbfs mounts they own.
* To allow that, this program is installed setuid root, and
* it adds SYS_MOUNT privilege here (if needed), and then
* restores the user's normal privileges.
*/
if (__init_suid_priv(0, PRIV_SYS_MOUNT, (char *)NULL) < 0) {
(void) fprintf(stderr,
gettext("Insufficient privileges, "
"%s must be set-uid root\n"), argv[0]);
exit(RET_ERR);
}
myname = strrchr(argv[0], '/');
myname = myname ? myname+1 : argv[0];
(void) sprintf(typename, "smbfs %s", myname);
argv[0] = typename;
/*
* Set options
*/
while ((c = getopt(argc, argv, "f")) != EOF) {
switch (c) {
case 'f':
umnt_flag |= MS_FORCE; /* forced unmount is desired */
break;
default:
usage();
exit(RET_ERR);
}
}
if (argc - optind != 1) {
usage();
exit(RET_ERR);
}
return (smbfs_unmount(argv[optind], umnt_flag));
}
static void
pr_err(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void) fprintf(stderr, "%s: ", typename);
(void) vfprintf(stderr, fmt, ap);
(void) fflush(stderr);
va_end(ap);
}
static void
usage()
{
(void) fprintf(stderr,
gettext("Usage: smbfs umount [-o opts] {//server/share | dir}\n"));
exit(RET_ERR);
}
static int
smbfs_unmount(char *pathname, int umnt_flag)
{
struct extmnttab *mntp;
int rc;
mntp = mnttab_find(pathname);
if (mntp) {
pathname = mntp->mnt_mountp;
}
/* Need sys_mount privilege for the umount call. */
(void) __priv_bracket(PRIV_ON);
rc = umount2(pathname, umnt_flag);
(void) __priv_bracket(PRIV_OFF);
if (rc < 0) {
pr_err(gettext("%s: %s\n"), pathname, strerror(errno));
return (RET_ERR);
}
return (RET_OK);
}
/*
* Find the mnttab entry that corresponds to "name".
* We're not sure what the name represents: either
* a mountpoint name, or a special name (server:/path).
* Return the last entry in the file that matches.
*/
static struct extmnttab *
mnttab_find(dirname)
char *dirname;
{
FILE *fp;
struct extmnttab mnt;
struct extmnttab *res = NULL;
fp = fopen(MNTTAB, "r");
if (fp == NULL) {
pr_err("%s: %s\n", MNTTAB, strerror(errno));
return (NULL);
}
while (getextmntent(fp, &mnt, sizeof (struct extmnttab)) == 0) {
if (strcmp(mnt.mnt_mountp, dirname) == 0 ||
strcmp(mnt.mnt_special, dirname) == 0) {
if (res)
fsfreemnttab(res);
res = fsdupmnttab(&mnt);
}
}
fclose(fp);
return (res);
}
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