cmd/zpool/zpool_util.c

	zpool_util.c revision fa9e4066f08beec538e775443c5be79dd423fcab
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <errno.h>
#include <libgen.h>
#include <libintl.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>

#include "zpool_util.h"

/*
 * Utility function to guarantee malloc() success.
 */
void *
safe_malloc(size_t size)
{
    void *data;

    if ((data = calloc(1, size)) == NULL) {
        (void) fprintf(stderr, "internal error: out of memory\n");
        exit(1);
    }

    return (data);
}

/*
 * Same as above, but for strdup()
 */
char *
safe_strdup(const char *str)
{
    char *ret;

    if ((ret = strdup(str)) == NULL) {
        (void) fprintf(stderr, "internal error: out of memory\n");
        exit(1);
    }

    return (ret);
}

/*
 * Display an out of memory error message and abort the current program.
 */
void
no_memory(void)
{
    assert(errno == ENOMEM);
    (void) fprintf(stderr,
        gettext("internal error: out of memory\n"));
    exit(1);
}

/*
 * Given a vdev, return the name to display in iostat.  If the vdev has a path,
 * we use that, stripping off any leading "/dev/dsk/"; if not, we use the type.
 */
const char *
vdev_get_name(nvlist_t *nv)
{
    char *path, *type;

    if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) == 0) {
        if (strncmp(path, "/dev/dsk/", 9) == 0)
            return (path + 9);
        return (path);
    }

    verify(nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) == 0);

    return (type);
}