cfstagchk.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.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* -----------------------------------------------------------------
*
* cfstagchk.c
*
* Cache FS admin utility. Used to read and/or write a
* cache tag from/to the specified partition.
*/
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdarg.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/vtoc.h>
void pr_err(char *fmt, ...);
void usage(char *);
/*
* -----------------------------------------------------------------
*
* main
*
* Description:
* Main routine for the cfstagchk program
* Arguments:
* argc number of command line arguments
* argv command line arguments
* Returns:
* Returns 0 for failure, > 0 for an error.
* Preconditions:
*/
int
main(int argc, char **argv)
{
int c;
int which;
char *path;
int wflag;
int fd, err, slice;
struct vtoc vtoc;
struct partition *p;
/* verify root running command */
if (getuid() != 0) {
pr_err(gettext("must be run by root"));
return (1);
}
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN "SYS_TEST"
#endif
(void) textdomain(TEXT_DOMAIN);
/* set defaults for command line options */
wflag = 0;
/* parse the command line arguments */
while ((c = getopt(argc, argv, "w")) != EOF) {
switch (c) {
case 'w': /* write */
wflag = 1;
break;
default:
usage(gettext("illegal option"));
return (1);
}
}
argc -= optind;
argv += optind;
if (argc != 1) {
usage(gettext("must specify a single device"));
return (1);
}
fd = open(*argv, O_RDWR);
if (fd < 0) {
pr_err("can't open %s", *argv);
return (1);
}
slice = read_vtoc(fd, &vtoc);
if (slice < 0) {
pr_err(gettext("can't read vtoc"));
return (1);
}
p = &vtoc.v_part[slice];
if (!wflag) {
err = 0;
if (p->p_tag != V_CACHE)
err++;
} else {
p->p_tag = V_CACHE;
err = write_vtoc(fd, &vtoc);
if (err < 0)
pr_err(gettext("write_vtoc failure"));
}
return (err);
}
/*
* -----------------------------------------------------------------
*
* usage
*
* Description:
* Prints a usage message for this utility.
* Arguments:
* msgp message to include with the usage message
* Returns:
* Preconditions:
* precond(msgp)
*/
void
usage(char *msgp)
{
fprintf(stderr, gettext("cfstagchk: %s\n"), msgp);
fprintf(stderr, gettext("usage: cfstagchk [-w] device\n"));
}
/*
* -----------------------------------------------------------------
*
* pr_err
*
* Description:
* Prints an error message to stderr.
* Arguments:
* fmt printf style format
* ... arguments for fmt
* Returns:
* Preconditions:
* precond(fmt)
*/
void
pr_err(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void) fprintf(stderr, gettext("cfstagchk: "));
(void) vfprintf(stderr, fmt, ap);
(void) fprintf(stderr, "\n");
va_end(ap);
}