unshare.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* 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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* nfs unshare
*/
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#include <sys/param.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include "../lib/sharetab.h"
#include "../lib/nfslogtab.h"
#define RET_OK 0
#define RET_ERR 32
static int do_unshare();
static void pr_err(char *, ...);
static int sharetab_del();
static int nfslogtab_deactivate();
static void usage();
int
main(argc, argv)
int argc;
char **argv;
{
char dir[MAXPATHLEN];
if (argc != 2) {
usage();
exit(1);
}
/* Don't drop core if the NFS module isn't loaded. */
signal(SIGSYS, SIG_IGN);
if (realpath(argv[1], dir) == NULL) {
pr_err("%s: %s\n", argv[1], strerror(errno));
exit(RET_ERR);
}
return (do_unshare(dir));
}
static int
do_unshare(path)
char *path;
{
int logging = 0;
if (exportfs(path, NULL) < 0) {
if (errno == EINVAL)
pr_err("%s: not shared\n", path);
else
pr_err("%s: %s\n", path, strerror(errno));
return (RET_ERR);
}
if (sharetab_del(path, &logging) < 0)
return (RET_ERR);
if (logging) {
if (nfslogtab_deactivate(path) < 0)
return (RET_ERR);
}
return (RET_OK);
}
/*
* Remove an entry from the sharetab file.
*/
static int
sharetab_del(path, logging)
char *path;
int *logging;
{
FILE *f;
f = fopen(SHARETAB, "r+");
if (f == NULL) {
pr_err("%s: %s\n", SHARETAB, strerror(errno));
return (-1);
}
if (lockf(fileno(f), F_LOCK, 0L) < 0) {
pr_err("cannot lock %s: %s\n", SHARETAB, strerror(errno));
(void) fclose(f);
return (-1);
}
if (remshare(f, path, logging) < 0) {
pr_err("remshare\n");
(void) fclose(f);
return (-1);
}
(void) fclose(f);
return (0);
}
/*
* Deactivate an entry from the nfslogtab file.
*/
static int
nfslogtab_deactivate(path)
char *path;
{
FILE *f;
int error = 0;
f = fopen(NFSLOGTAB, "r+");
if (f == NULL) {
error = errno;
pr_err("%s: %s\n", NFSLOGTAB, strerror(error));
goto out;
}
if (lockf(fileno(f), F_LOCK, 0L) < 0) {
error = errno;
pr_err("cannot lock %s: %s\n", NFSLOGTAB, strerror(error));
goto out;
}
if (logtab_deactivate(f, NULL, path, NULL) == -1) {
error = -1;
pr_err("logtab_deactivate\n");
goto out;
}
out: if (error) {
pr_err("could not deactivate %s entry in %s\n",
path, NFSLOGTAB);
}
if (f != NULL)
(void) fclose(f);
return (error);
}
static void
usage()
{
(void) fprintf(stderr, "Usage: unshare { pathname | resource }\n");
}
/*VARARGS1*/
static void
pr_err(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void) fprintf(stderr, "nfs unshare: ");
(void) vfprintf(stderr, fmt, ap);
va_end(ap);
}