1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29/*
30 *
31 *			cfsfstype.c
32 *
33 * Cache FS admin utility.  Used to glean information out of the
34 * rootfs, frontfs, and backfs variables in the kernel.
35 */
36
37#include <locale.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <unistd.h>
41#include <string.h>
42#include <errno.h>
43#include <limits.h>
44#include <dirent.h>
45#include <ftw.h>
46#include <fcntl.h>
47#include <ctype.h>
48#include <stdarg.h>
49#include <sys/param.h>
50#include <sys/types.h>
51#include <sys/filio.h>
52#include <sys/stat.h>
53#include <sys/statvfs.h>
54#include <sys/fs/cachefs_fs.h>
55#include <sys/fs/cachefs_dir.h>
56
57
58static void pr_err(char *fmt, ...);
59static void usage(char *);
60
61/*
62 *
63 *			main
64 *
65 * Description:
66 *	Main routine for the cfsfstype program.
67 * Arguments:
68 *	argc	number of command line arguments
69 *	argv	command line arguments
70 * Returns:
71 *	Returns 0 for failure, > 0 for an error.
72 * Preconditions:
73 */
74
75int
76main(int argc, char **argv)
77{
78	int c;
79	int nflag = 0;
80	struct statvfs64 svb;
81	int fd;
82
83	/* verify root running command */
84	if (getuid() != 0) {
85		pr_err(gettext("must be run by root"));
86		return (1);
87	}
88
89	(void) setlocale(LC_ALL, "");
90#if !defined(TEXT_DOMAIN)
91#define	TEXT_DOMAIN	"SYS_TEST"
92#endif
93	(void) textdomain(TEXT_DOMAIN);
94
95	/* parse the command line arguments */
96	while ((c = getopt(argc, argv, "n")) != EOF) {
97		switch (c) {
98
99		case 'n':
100			nflag = 1;
101			break;
102
103		default:
104			usage(gettext("illegal option"));
105			return (1);
106		}
107	}
108	argc -= optind;
109	argv += optind;
110	if (argc > 1) {
111		usage(gettext("too many file names specified"));
112		return (1);
113	}
114
115	/* if just path is specified, just statvfs it */
116	if (!nflag) {
117		if (argc != 1) {
118			usage(gettext("no file name"));
119			return (1);
120		}
121		if (statvfs64(*argv, &svb) < 0) {
122			pr_err(gettext("Cannot open %s: %s"), *argv,
123				strerror(errno));
124			return (1);
125		}
126		(void) printf("%s\n", svb.f_basetype);
127		return (0);
128	}
129
130	fd = open("/", O_RDONLY);
131	if (fd < 0) {
132		perror(gettext("Open of root directory"));
133		return (1);
134	}
135
136	if (argc == 1) {
137		close(fd);
138		fd = open(*argv, O_RDONLY);
139		if (fd < 0) {
140			perror(gettext("open of specified directory"));
141			return (1);
142		}
143	}
144
145	if (ioctl(fd, _FIOSTOPCACHE)) {
146		perror(gettext("Convert ioctl fault"));
147		return (1);
148	}
149	return (0);
150}
151
152/*
153 *
154 *			usage
155 *
156 * Description:
157 *	Prints a usage message for this utility.
158 * Arguments:
159 *	msgp	message to include with the usage message
160 * Returns:
161 * Preconditions:
162 *	precond(msgp)
163 */
164
165static void
166usage(char *msgp)
167{
168	fprintf(stderr, gettext("cfsfstype: %s\n"), msgp);
169	fprintf(stderr, gettext("usage: cfsfstype file\n"));
170}
171
172/*
173 *
174 *			pr_err
175 *
176 * Description:
177 *	Prints an error message to stderr.
178 * Arguments:
179 *	fmt	printf style format
180 *	...	arguments for fmt
181 * Returns:
182 * Preconditions:
183 *	precond(fmt)
184 */
185
186static void
187pr_err(char *fmt, ...)
188{
189	va_list ap;
190
191	va_start(ap, fmt);
192	(void) fprintf(stderr, gettext("cfsfstype: "));
193	(void) vfprintf(stderr, fmt, ap);
194	(void) fprintf(stderr, "\n");
195	va_end(ap);
196}
197