the existing attribute file rather than aborting with an error. o Useful if you want to reset the state of attributes on the system without allocating different disk blocks through deletion and recreation, for example, if you're doing benchmarks of extended attribute code. :-) Obtained from: TrustedBSD Project
196 lines
4.6 KiB
C
196 lines
4.6 KiB
C
/*-
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* Copyright (c) 1999, 2000 Robert N. M. Watson
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* TrustedBSD Project - extended attribute support for UFS-like file systems
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*/
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/extattr.h>
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <ufs/ufs/extattr.h>
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#include <fcntl.h>
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#include <stdio.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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extern char *optarg;
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extern int optind;
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void
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usage(void)
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{
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fprintf(stderr,
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"usage:\n"
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" extattrctl start [path]\n"
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" extattrctl stop [path]\n"
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" extattrctl initattr [-o] [-p path] [attrsize] [attrfile]\n"
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" extattrctl enable [path] [attrname] [attrfile]\n"
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" extattrctl disable [path] [attrname]\n");
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exit(-1);
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}
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long
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num_inodes_by_path(char *path)
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{
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struct statfs buf;
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int error;
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error = statfs(path, &buf);
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if (error) {
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perror("statfs");
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return (-1);
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}
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return (buf.f_files);
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}
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int
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initattr(int argc, char *argv[])
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{
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struct ufs_extattr_fileheader uef;
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char *fs_path = NULL;
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char *zero_buf = NULL;
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long loop, num_inodes;
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int ch, i, error, chunksize, overwrite = 0, flags;
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optind = 0;
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while ((ch = getopt(argc, argv, "op:r:w:")) != -1)
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switch (ch) {
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case 'o':
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overwrite = 1;
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break;
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case 'p':
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fs_path = strdup(optarg);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 2)
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usage();
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if (overwrite)
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flags = O_CREAT | O_WRONLY;
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else
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flags = O_CREAT | O_EXCL | O_WRONLY;
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error = 0;
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if ((i = open(argv[1], flags, 0600)) != -1) {
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uef.uef_magic = UFS_EXTATTR_MAGIC;
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uef.uef_version = UFS_EXTATTR_VERSION;
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uef.uef_size = atoi(argv[0]);
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if (write(i, &uef, sizeof(uef)) == -1)
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error = -1;
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else if (fs_path) {
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zero_buf = (char *) (malloc(uef.uef_size));
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if (zero_buf == NULL) {
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perror("malloc");
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unlink(argv[1]);
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return (-1);
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}
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memset(zero_buf, 0, uef.uef_size);
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num_inodes = num_inodes_by_path(fs_path);
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chunksize = sizeof(struct ufs_extattr_header) +
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uef.uef_size;
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for (loop = 0; loop < num_inodes; loop++) {
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error = write(i, zero_buf, chunksize);
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if (error != chunksize) {
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perror("write");
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unlink(argv[1]);
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return (-1);
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}
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}
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}
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}
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if (i == -1) {
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/* unable to open file */
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perror(argv[1]);
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return (-1);
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}
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if (error == -1) {
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perror(argv[1]);
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unlink(argv[1]);
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return (-1);
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}
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return (0);
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}
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int
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main(int argc, char *argv[])
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{
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int error = 0;
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if (argc < 2)
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usage();
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if (!strcmp(argv[1], "start")) {
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if (argc != 3)
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usage();
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error = extattrctl(argv[2], UFS_EXTATTR_CMD_START, 0, 0);
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if (error)
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perror("extattrctl start");
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} else if (!strcmp(argv[1], "stop")) {
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if (argc != 3)
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usage();
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error = extattrctl(argv[2], UFS_EXTATTR_CMD_STOP, 0, 0);
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if (error)
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perror("extattrctl stop");
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} else if (!strcmp(argv[1], "enable")) {
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if (argc != 5)
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usage();
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error = extattrctl(argv[2], UFS_EXTATTR_CMD_ENABLE, argv[3],
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argv[4]);
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if (error)
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perror("extattrctl enable");
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} else if (!strcmp(argv[1], "disable")) {
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if (argc != 4)
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usage();
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error = extattrctl(argv[2], UFS_EXTATTR_CMD_DISABLE, argv[3],
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NULL);
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if (error)
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perror("extattrctl disable");
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} else if (!strcmp(argv[1], "initattr")) {
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argc -= 2;
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argv += 2;
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error = initattr(argc, argv);
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} else
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usage();
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return(error);
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}
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