cfsfstype.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"
/*
*
* cfsfstype.c
*
* Cache FS admin utility. Used to glean information out of the
* rootfs, frontfs, and backfs variables in the kernel.
*/
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <dirent.h>
#include <ftw.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdarg.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/filio.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/fs/cachefs_fs.h>
#include <sys/fs/cachefs_dir.h>
static void pr_err(char *fmt, ...);
static void usage(char *);
/*
*
* main
*
* Description:
* Main routine for the cfsfstype 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 nflag = 0;
struct statvfs64 svb;
int fd;
/* 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);
/* parse the command line arguments */
while ((c = getopt(argc, argv, "n")) != EOF) {
switch (c) {
case 'n':
nflag = 1;
break;
default:
usage(gettext("illegal option"));
return (1);
}
}
argc -= optind;
argv += optind;
if (argc > 1) {
usage(gettext("too many file names specified"));
return (1);
}
/* if just path is specified, just statvfs it */
if (!nflag) {
if (argc != 1) {
usage(gettext("no file name"));
return (1);
}
if (statvfs64(*argv, &svb) < 0) {
pr_err(gettext("Cannot open %s: %s"), *argv,
strerror(errno));
return (1);
}
(void) printf("%s\n", svb.f_basetype);
return (0);
}
fd = open("/", O_RDONLY);
if (fd < 0) {
perror(gettext("Open of root directory"));
return (1);
}
if (argc == 1) {
close(fd);
fd = open(*argv, O_RDONLY);
if (fd < 0) {
perror(gettext("open of specified directory"));
return (1);
}
}
if (ioctl(fd, _FIOSTOPCACHE)) {
perror(gettext("Convert ioctl fault"));
return (1);
}
return (0);
}
/*
*
* usage
*
* Description:
* Prints a usage message for this utility.
* Arguments:
* msgp message to include with the usage message
* Returns:
* Preconditions:
* precond(msgp)
*/
static void
usage(char *msgp)
{
fprintf(stderr, gettext("cfsfstype: %s\n"), msgp);
fprintf(stderr, gettext("usage: cfsfstype file\n"));
}
/*
*
* pr_err
*
* Description:
* Prints an error message to stderr.
* Arguments:
* fmt printf style format
* ... arguments for fmt
* Returns:
* Preconditions:
* precond(fmt)
*/
static void
pr_err(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
(void) fprintf(stderr, gettext("cfsfstype: "));
(void) vfprintf(stderr, fmt, ap);
(void) fprintf(stderr, "\n");
va_end(ap);
}