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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libzutil.h>
/* Substring from after the last slash, or the string itself if none */
const char *
zfs_basename(const char *path)
{
const char *bn = strrchr(path, '/');
return (bn ? bn + 1 : path);
}
/* Return index of last slash or -1 if none */
ssize_t
zfs_dirnamelen(const char *path)
{
const char *end = strrchr(path, '/');
return (end ? end - path : -1);
}
/*
* Given a shorthand device name check if a file by that name exists in any
* of the 'zpool_default_import_path' or ZPOOL_IMPORT_PATH directories. If
* one is found, store its fully qualified path in the 'path' buffer passed
* by the caller and return 0, otherwise return an error.
*/
int
zfs_resolve_shortname(const char *name, char *path, size_t len)
{
int i, error = -1;
char *dir, *env, *envdup, *tmp = NULL;
env = getenv("ZPOOL_IMPORT_PATH");
errno = ENOENT;
if (env) {
envdup = strdup(env);
for (dir = strtok_r(envdup, ":", &tmp);
dir != NULL && error != 0;
dir = strtok_r(NULL, ":", &tmp)) {
(void) snprintf(path, len, "%s/%s", dir, name);
error = access(path, F_OK);
}
free(envdup);
} else {
const char * const *zpool_default_import_path;
size_t count;
zpool_default_import_path = zpool_default_search_paths(&count);
for (i = 0; i < count && error < 0; i++) {
(void) snprintf(path, len, "%s/%s",
zpool_default_import_path[i], name);
error = access(path, F_OK);
}
}
return (error ? ENOENT : 0);
}
/*
* Given a shorthand device name look for a match against 'cmp_name'. This
* is done by checking all prefix expansions using either the default
* 'zpool_default_import_paths' or the ZPOOL_IMPORT_PATH environment
* variable. Proper partition suffixes will be appended if this is a
* whole disk. When a match is found 0 is returned otherwise ENOENT.
*/
static int
zfs_strcmp_shortname(const char *name, const char *cmp_name, int wholedisk)
{
int path_len, cmp_len, i = 0, error = ENOENT;
char *dir, *env, *envdup = NULL, *tmp = NULL;
char path_name[MAXPATHLEN];
const char * const *zpool_default_import_path = NULL;
size_t count;
cmp_len = strlen(cmp_name);
env = getenv("ZPOOL_IMPORT_PATH");
if (env) {
envdup = strdup(env);
dir = strtok_r(envdup, ":", &tmp);
} else {
zpool_default_import_path = zpool_default_search_paths(&count);
dir = (char *)zpool_default_import_path[i];
}
while (dir) {
/* Trim trailing directory slashes from ZPOOL_IMPORT_PATH */
if (env) {
while (dir[strlen(dir)-1] == '/')
dir[strlen(dir)-1] = '\0';
}
path_len = snprintf(path_name, MAXPATHLEN, "%s/%s", dir, name);
if (wholedisk)
path_len = zfs_append_partition(path_name, MAXPATHLEN);
if ((path_len == cmp_len) && strcmp(path_name, cmp_name) == 0) {
error = 0;
break;
}
if (env) {
dir = strtok_r(NULL, ":", &tmp);
} else if (++i < count) {
dir = (char *)zpool_default_import_path[i];
} else {
dir = NULL;
}
}
if (env)
free(envdup);
return (error);
}
/*
* Given either a shorthand or fully qualified path name look for a match
* against 'cmp'. The passed name will be expanded as needed for comparison
* purposes and redundant slashes stripped to ensure an accurate match.
*/
int
zfs_strcmp_pathname(const char *name, const char *cmp, int wholedisk)
{
int path_len, cmp_len;
char path_name[MAXPATHLEN];
char cmp_name[MAXPATHLEN];
char *dir, *tmp = NULL;
/* Strip redundant slashes if they exist due to ZPOOL_IMPORT_PATH */
cmp_name[0] = '\0';
(void) strlcpy(path_name, cmp, sizeof (path_name));
for (dir = strtok_r(path_name, "/", &tmp);
dir != NULL;
dir = strtok_r(NULL, "/", &tmp)) {
strlcat(cmp_name, "/", sizeof (cmp_name));
strlcat(cmp_name, dir, sizeof (cmp_name));
}
if (name[0] != '/')
return (zfs_strcmp_shortname(name, cmp_name, wholedisk));
(void) strlcpy(path_name, name, MAXPATHLEN);
path_len = strlen(path_name);
cmp_len = strlen(cmp_name);
if (wholedisk) {
path_len = zfs_append_partition(path_name, MAXPATHLEN);
if (path_len == -1)
return (ENOMEM);
}
if ((path_len != cmp_len) || strcmp(path_name, cmp_name))
return (ENOENT);
return (0);
}
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