126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/* $NetBSD: quota_open.c,v 1.3 2012/01/09 15:29:56 dholland Exp $ */
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/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by David A. Holland.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: quota_open.c,v 1.3 2012/01/09 15:29:56 dholland Exp $");
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#include <sys/types.h>
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#include <sys/statvfs.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <quota.h>
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#include "quotapvt.h"
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struct quotahandle *
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quota_open(const char *path)
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{
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struct statvfs stv;
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struct quotahandle *qh;
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int isnfs;
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int serrno;
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if (statvfs(path, &stv) < 0) {
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return NULL;
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}
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/*
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* We need to know up front if the volume is NFS. If so, we
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* don't go to the kernel at all but instead do RPCs to the
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* NFS server's rpc.rquotad. Therefore, don't check the
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* mount flags for quota support or do anything else that
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* reaches the kernel.
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*/
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if (!strcmp(stv.f_fstypename, "nfs")) {
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isnfs = 1;
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} else {
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isnfs = 0;
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if ((stv.f_flag & ST_QUOTA) == 0) {
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/* XXX: correct errno? */
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errno = EOPNOTSUPP;
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return NULL;
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}
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}
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qh = malloc(sizeof(*qh));
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if (qh == NULL) {
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return NULL;
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}
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/*
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* Get the mount point from statvfs; this way the passed-in
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* path can be any path on the volume.
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*/
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qh->qh_mountpoint = strdup(stv.f_mntonname);
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if (qh->qh_mountpoint == NULL) {
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serrno = errno;
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free(qh);
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errno = serrno;
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return NULL;
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}
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qh->qh_mountdevice = strdup(stv.f_mntfromname);
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if (qh->qh_mountdevice == NULL) {
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serrno = errno;
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free(qh->qh_mountpoint);
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free(qh);
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errno = serrno;
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return NULL;
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}
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qh->qh_isnfs = isnfs;
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return qh;
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}
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const char *
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quota_getmountpoint(struct quotahandle *qh)
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{
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return qh->qh_mountpoint;
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}
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const char *
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quota_getmountdevice(struct quotahandle *qh)
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{
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return qh->qh_mountdevice;
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}
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void
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quota_close(struct quotahandle *qh)
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{
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free(qh->qh_mountdevice);
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free(qh->qh_mountpoint);
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free(qh);
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}
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