libsvm/common/check_svm.c

	check_svm.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * 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 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <meta.h>
#include <sys/types.h>
#include <sys/mkdev.h>
#include <sys/stat.h>
#include <limits.h>
#include <svm.h>

/*
 * FUNCTION: valid_bootlist
 *
 * INPUT: file pointer, line buffer, line_length
 *
 * RETURN VALUES:
 *  0 - SUCCESS
 *  -1 - FAIL
 *
 */

int
valid_bootlist(FILE *fp, int line_len)
{
    char *bp = NULL;
    char *line;

    /*
     * errno may not be cleared by callee routines and we
     * we want to catch fgets failures hence errno is reset.
     */
    errno = 0;
    if ((line = malloc(line_len)) == NULL)
        return (RET_ERROR);

    while (fgets(line, line_len, fp) != NULL) {
        bp = strstr(line, "mddb_bootlist");
        if (bp != NULL) {
            /* if not commented out then breakout */
            if (*line != '*' && *line != '#') {
                break;
            }
        }
    }

    free(line);
    if (bp == NULL || errno != 0)
        return (RET_ERROR);

    return (RET_SUCCESS);
}

/*
 * FUNCTION: svm_check
 *  Check the existance of DiskSuite or SVM
 *
 * INPUT: rootpath
 *
 * RETURN VALUES:
 *  0 - SUCCESS
 *  -1 - FAIL
 */

int
svm_check(char *path)
{
    FILE *fp;
    char tmppath[PATH_MAX];
    int rval;

    (void) strcat(strcpy(tmppath, path), MD_CONF);

    if ((fp = fopen(tmppath, "r")) == NULL) {
        rval = errno;
        goto free_exit;
    }

    rval = valid_bootlist(fp, MDDB_BOOTLIST_MAX_LEN);

    debug_printf("svm_check(): valid bootlist in %s. status %d\n",
        tmppath, rval);

    if (rval == RET_SUCCESS) {
        goto free_exit;
    }
    (void) fclose(fp);

    /* not found in md.conf  try etc/system */
    (void) strcat(strcpy(tmppath, path), SYSTEM_FILE);

    if ((fp = fopen(tmppath, "r")) == NULL) {
        rval = errno;
        goto free_exit;
    }

    rval = valid_bootlist(fp, MDDB_BOOTLIST_MAX_LEN);

    debug_printf("svm_check(): valid bootlist in %s. status %d\n",
        tmppath, rval);
free_exit:
    (void) fclose(fp);
    if (rval > 0)
        rval = RET_ERROR;
    return (rval);
}

/*
 * FUNCTION: svm_is_md
 *  Check if the the given device name has an md driver.
 * INPUT: special device name (/dev/dsk/c0t0d0s0 or /dev/md/dsk/d10)
 *
 * RETURN:
 *  1 - if it is a metadevice.
 *  0 - if it is not a metadevice.
 */

int
svm_is_md(char *device_name)
{
    char buf[30];
    struct stat sbuf;
    int rval = 0;

    (void) memset(buf, 0, 30);

    debug_printf("svm_is_md(): device %s\n", device_name);
    if (stat(device_name, &sbuf) != 0)
        return (RET_ERROR);

    if (get_drv_name(major(sbuf.st_rdev), "/", buf) == RET_ERROR) {
        debug_printf("svm_is_md(): device get_drv_name failed: %s\n",
                device_name);
        return (0);
    }
    if (strcmp(buf, MD_MODULE) == 0) {
        debug_printf("svm_is_md(): device %s succeed\n", device_name);
        rval = 1;
    }
    return (rval);
}