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/*
* Author: Colin King <colin.king@canonical.com>
*
* Copyright (C) 2013 Canonical, Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/xattr.h>
#define XATTR_METADATA_NAME "user.ecryptfs"
static const char *names[] = {
"user.test1",
"user.test2",
"user.test3",
NULL
};
static const char *values[] = {
"test value #1",
"test value #2",
"test value #3",
NULL
};
static void usage(const char *name)
{
fprintf(stderr, "Usage: %s [-x] file\n", name);
}
int main(int argc, char **argv)
{
ssize_t len, names_len = 0;
int i, rc, xattr_metadata = 0;
char buffer[1024];
char *file, *ptr = buffer;
if (argc < 2 || argc > 3) {
usage(argv[0]);
exit(EXIT_FAILURE);
}
file = argv[1];
if (argc == 3) {
if (strcmp(argv[1], "-x")) {
usage(argv[0]);
exit(EXIT_FAILURE);
}
file = argv[2];
/*
* The XATTR_METADATA_NAME xattr is set. Account for it in
* future sanity checks.
*/
xattr_metadata = 1;
names_len = 1 + strlen(XATTR_METADATA_NAME);
}
for (i = 0; names[i]; i++) {
if (setxattr(file, names[i], values[i], strlen(values[i]), 0) < 0)
exit(EXIT_FAILURE);
names_len += 1 + strlen(names[i]);
}
/*
* Sanity check that listxattr returns correct length
*/
len = listxattr(file, NULL, 0);
if (len != names_len || len > sizeof(buffer))
exit(EXIT_FAILURE);
memset(buffer, 0, sizeof(buffer));
len = listxattr(file, buffer, sizeof(buffer));
if (len != names_len)
exit(EXIT_FAILURE);
/*
* Check listxattr names match what has been just set
*/
for (ptr = buffer; *ptr; ptr += strlen(ptr) + 1) {
int matched = 0;
if (xattr_metadata && !strcmp(XATTR_METADATA_NAME, ptr))
continue;
for (i = 0; names[i]; i++) {
if (strcmp(names[i], ptr))
continue;
matched = 1;
break;
}
if (!matched)
exit(EXIT_FAILURE);
}
/*
* Check contents of xattr
*/
for (i = 0; names[i]; i++) {
len = getxattr(file, names[i], buffer, sizeof(buffer));
if (len < 0)
exit(EXIT_FAILURE);
buffer[len] = '\0';
if (strcmp(values[i], buffer))
exit(EXIT_FAILURE);
}
/*
* Remove xattr
*/
for (i = 0; names[i]; i++) {
rc = removexattr(file, names[i]);
if (rc < 0)
exit(EXIT_FAILURE);
names_len -= 1 + strlen(names[i]);
}
/*
* ..and the only xattrs that should be left are those that were
* already there when the test started
*/
len = listxattr(file, NULL, 0);
if (len != names_len)
exit(EXIT_FAILURE);
exit(EXIT_SUCCESS);
}
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