fa577c93e1
dispatching. Allow access to the quota files via the oldfiles code if quotaon hasn't run yet. Change the latter so it calls getfsent() up front (and only once) to make it easier to avoid whacking caller state.
147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
/* $NetBSD: quota_open.c,v 1.5 2012/01/25 17:43:37 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 1.5 2012/01/25 17:43:37 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 <unistd.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 mode;
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int serrno;
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/*
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* Probe order:
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*
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* 1. Check for NFS. NFS quota ops don't go to the kernel
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* at all but instead do RPCs to the NFS server's
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* rpc.rquotad, so it doesn't matter what the kernel
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* thinks.
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*
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* 2. Check if quotas are enabled in the mount flags. If
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* so, we can do quotactl calls.
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*
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* 3. Check if the volume is listed in fstab as one of
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* the filesystem types supported by quota_oldfiles.c,
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* and with the proper mount options to enable quotas.
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*/
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if (statvfs(path, &stv) < 0) {
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return NULL;
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}
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__quota_oldfiles_load_fstab();
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if (!strcmp(stv.f_fstypename, "nfs")) {
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mode = QUOTA_MODE_NFS;
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} else if ((stv.f_flag & ST_QUOTA) != 0) {
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mode = QUOTA_MODE_PROPLIB;
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} else if (__quota_oldfiles_infstab(stv.f_mntonname)) {
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mode = QUOTA_MODE_OLDFILES;
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} else {
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errno = EOPNOTSUPP;
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return NULL;
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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_mode = mode;
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qh->qh_oldfilesopen = 0;
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qh->qh_userfile = -1;
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qh->qh_groupfile = -1;
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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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if (qh->qh_userfile >= 0) {
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close(qh->qh_userfile);
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}
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if (qh->qh_groupfile >= 0) {
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close(qh->qh_groupfile);
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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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