zfs/lib/libspl/getmntany.c

100 lines
2.3 KiB
C

/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2005 Sun Microsystems, Inc. All rights reserved.
* Copyright 2006 Ricardo Correia. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#include <stdio.h>
#include <string.h>
#include <mntent.h>
#include <sys/mnttab.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#define BUFSIZE (MNT_LINE_MAX + 2)
__thread char buf[BUFSIZE];
#define DIFF(xx) ((mrefp->xx != NULL) && \
(mgetp->xx == NULL || strcmp(mrefp->xx, mgetp->xx) != 0))
int
getmntany(FILE *fp, struct mnttab *mgetp, struct mnttab *mrefp)
{
int ret;
while (((ret = _sol_getmntent(fp, mgetp)) == 0) &&
(DIFF(mnt_special) || DIFF(mnt_mountp) ||
DIFF(mnt_fstype) || DIFF(mnt_mntopts)));
return ret;
}
int
_sol_getmntent(FILE *fp, struct mnttab *mgetp)
{
struct mntent mntbuf;
struct mntent *ret;
ret = getmntent_r(fp, &mntbuf, buf, BUFSIZE);
if (ret != NULL) {
mgetp->mnt_special = mntbuf.mnt_fsname;
mgetp->mnt_mountp = mntbuf.mnt_dir;
mgetp->mnt_fstype = mntbuf.mnt_type;
mgetp->mnt_mntopts = mntbuf.mnt_opts;
return 0;
}
if (feof(fp))
return -1;
return MNT_TOOLONG;
}
int
getextmntent(FILE *fp, struct extmnttab *mp, int len)
{
int ret;
struct stat64 st;
ret = _sol_getmntent(fp, (struct mnttab *) mp);
if (ret == 0) {
if (stat64(mp->mnt_mountp, &st) != 0) {
mp->mnt_major = 0;
mp->mnt_minor = 0;
return ret;
}
mp->mnt_major = major(st.st_dev);
mp->mnt_minor = minor(st.st_dev);
}
return ret;
}