freebsd-nq/usr.sbin/extattrctl/extattrctl.c
Robert Watson 3b88d2796e o Correct getopt() argument so that initattr -r and -w take an additional
argument via optarg.  This corrects a segfault when initattr is invoked
  with either of these two arguments.  Not sure how this got broken given
  that in the original patches it was fine -- presumably a merging
  mistake.

Obtained from:	TrustedBSD Project
2000-07-12 02:20:16 +00:00

220 lines
5.0 KiB
C

/*-
* Copyright (c) 1999, 2000 Robert N. M. Watson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* TrustedBSD Project - extended attribute support for UFS-like file systems
*/
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/extattr.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <ufs/ufs/extattr.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
extern char *optarg;
extern int optind;
void
usage(void)
{
fprintf(stderr,
"usage:\n"
" extattrctl start [path]\n"
" extattrctl stop [path]\n"
" extattrctl initattr [-p path] [-r [kroa]] [-w [kroa]] "
"[attrsize] [attrfile]\n"
" extattrctl enable [path] [attrname] [attrfile]\n"
" extattrctl disable [path] [attrname]\n");
exit(-1);
}
/*
* Return a level, or -1
*/
int
extattr_level_from_string(char *string)
{
if (strlen(string) != 1)
return (-1);
switch(string[0]) {
case 'k':
case 'K':
return (UFS_EXTATTR_PERM_KERNEL);
case 'r':
case 'R':
return (UFS_EXTATTR_PERM_ROOT);
case 'o':
case 'O':
return (UFS_EXTATTR_PERM_OWNER);
case 'a':
case 'A':
return (UFS_EXTATTR_PERM_ANYONE);
default:
return (-1);
}
}
long
num_inodes_by_path(char *path)
{
struct statfs buf;
int error;
error = statfs(path, &buf);
if (error) {
perror("statfs");
return (-1);
}
return (buf.f_files);
}
int
initattr(int argc, char *argv[])
{
struct ufs_extattr_fileheader uef;
char *fs_path = NULL;
char *zero_buf = NULL;
long loop, num_inodes;
int initattr_rlevel = UFS_EXTATTR_PERM_ROOT;
int initattr_wlevel = UFS_EXTATTR_PERM_ROOT;
int ch, i, error;
optind = 0;
while ((ch = getopt(argc, argv, "p:r:w:")) != -1)
switch (ch) {
case 'p':
fs_path = strdup(optarg);
break;
case 'r':
initattr_rlevel = extattr_level_from_string(optarg);
if (initattr_rlevel == -1)
usage();
break;
case 'w':
initattr_wlevel = extattr_level_from_string(optarg);
if (initattr_wlevel == -1)
usage();
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 2)
usage();
error = 0;
if ((i = open(argv[1], O_CREAT | O_EXCL | O_WRONLY, 0600)) != -1) {
uef.uef_magic = UFS_EXTATTR_MAGIC;
uef.uef_version = UFS_EXTATTR_VERSION;
uef.uef_write_perm = initattr_wlevel;
uef.uef_read_perm = initattr_rlevel;
uef.uef_size = atoi(argv[0]);
if (write(i, &uef, sizeof(uef)) == -1)
error = -1;
else if (fs_path) {
zero_buf = (char *) (malloc(uef.uef_size));
if (zero_buf == NULL) {
perror("malloc");
unlink(argv[1]);
return (-1);
}
memset(zero_buf, 0, uef.uef_size);
num_inodes = num_inodes_by_path(fs_path);
for (loop = 0; loop < num_inodes; loop++) {
error = write(i, zero_buf, uef.uef_size);
if (error != uef.uef_size) {
perror("write");
unlink(argv[1]);
return (-1);
}
}
}
}
if (i == -1 || error == -1) {
perror(argv[1]);
unlink(argv[1]);
return (-1);
}
return (0);
}
int
main(int argc, char *argv[])
{
int error = 0;
if (argc < 2)
usage();
if (!strcmp(argv[1], "start")) {
if (argc != 3)
usage();
error = extattrctl(argv[2], UFS_EXTATTR_CMD_START, 0, 0);
} else if (!strcmp(argv[1], "stop")) {
if (argc != 3)
usage();
error = extattrctl(argv[2], UFS_EXTATTR_CMD_STOP, 0, 0);
} else if (!strcmp(argv[1], "enable")) {
if (argc != 5)
usage();
error = extattrctl(argv[2], UFS_EXTATTR_CMD_ENABLE, argv[3],
argv[4]);
} else if (!strcmp(argv[1], "disable")) {
if (argc != 4)
usage();
error = extattrctl(argv[2], UFS_EXTATTR_CMD_DISABLE, argv[3],
NULL);
} else if (!strcmp(argv[1], "initattr")) {
argc -= 2;
argv += 2;
error = initattr(argc, argv);
} else
usage();
if (error)
perror(argv[1]);
return(error);
}