ufs/clri/clri.c

/*
 * 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.
 */

/*  Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */

/*
 * Portions of this source code were derived from Berkeley 4.3 BSD
 * under license from the Regents of the University of California.
 */

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

/*
 * clri filsys inumber ...
 */

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>

#include <sys/param.h>
#include <sys/types.h>
#include <sys/mntent.h>

#include <sys/vnode.h>
#include <sys/fs/ufs_inode.h>
#include <sys/fs/ufs_fs.h>

#include "roll_log.h"

#define ISIZE   (sizeof (struct dinode))
#define NI  (MAXBSIZE/ISIZE)

static struct dinode buf[NI];

static union {
    char        dummy[SBSIZE];
    struct fs   sblk;
} sb_un;
#define sblock sb_un.sblk

static int status;

static int read_sb(int fd, const char *dev);
static int isnumber(const char *s);

int
main(int argc, char *argv[])
{
    int     i, f;
    unsigned int    n;
    int     j;
    offset_t    off;
    int32_t     gen;
    time_t      t;
    int     sbrr;

    if (argc < 3) {
        (void) printf("ufs usage: clri filsys inumber ...\n");
        return (35);
    }
    f = open64(argv[1], 2);
    if (f < 0) {
        (void) printf("cannot open %s\n", argv[1]);
        return (35);
    }

    if ((sbrr = read_sb(f, argv[1])) != 0) {
        return (sbrr);
    }

    if ((sblock.fs_magic != FS_MAGIC) &&
        (sblock.fs_magic != MTB_UFS_MAGIC)) {
        (void) printf("bad super block magic number\n");
        return (35);
    }

    if (sblock.fs_magic == FS_MAGIC &&
        (sblock.fs_version != UFS_EFISTYLE4NONEFI_VERSION_2 &&
        sblock.fs_version != UFS_VERSION_MIN)) {
        (void) printf(
            "unrecognized version of UFS on-disk format: %d\n",
            sblock.fs_version);
        return (35);
    }

    if (sblock.fs_magic == MTB_UFS_MAGIC &&
        (sblock.fs_version > MTB_UFS_VERSION_1 ||
        sblock.fs_version < MTB_UFS_VERSION_MIN)) {
        (void) printf(
            "unrecognized version of UFS on-disk format: %d\n",
            sblock.fs_version);
        return (35);
    }

    /* If fs is logged, roll the log. */
    if (sblock.fs_logbno) {
        switch (rl_roll_log(argv[1])) {
        case RL_SUCCESS:
            /*
             * Reread the superblock.  Rolling the log may have
             * changed it.
             */
            if ((sbrr = read_sb(f, argv[1])) != 0) {
                return (sbrr);
            }
            break;
        case RL_SYSERR:
            (void) printf("Warning: Cannot roll log for %s.  %s.  "
                "Inodes will be cleared anyway.\n",
                argv[1], strerror(errno));
            break;
        default:
            (void) printf("Cannot roll log for %s.  "
                "Inodes will be cleared anyway.\n",
                argv[1]);
            break;
        }
    }

    for (i = 2; i < argc; i++) {
        if (!isnumber(argv[i])) {
            (void) printf("%s: is not a number\n", argv[i]);
            status = 1;
            continue;
        }
        n = atoi(argv[i]);
        if (n == 0) {
            (void) printf("%s: is zero\n", argv[i]);
            status = 1;
            continue;
        }
        off = fsbtodb(&sblock, itod(&sblock, n));
        off *= DEV_BSIZE;
        (void) llseek(f, off, 0);
        if (read(f, (char *)buf, sblock.fs_bsize) != sblock.fs_bsize) {
            (void) printf("%s: read error\n", argv[i]);
            status = 1;
        }
    }
    if (status)
        return (status+31);

    /*
     * Update the time in superblock, so fsck will check this filesystem.
     */
    (void) llseek(f, (offset_t)(SBLOCK * DEV_BSIZE), 0);
    (void) time(&t);
    sblock.fs_time = (time32_t)t;
    if (write(f, &sblock, SBSIZE) != SBSIZE) {
        (void) printf("cannot update %s\n", argv[1]);
        return (35);
    }

    for (i = 2; i < argc; i++) {
        n = atoi(argv[i]);
        (void) printf("clearing %u\n", n);
        off = fsbtodb(&sblock, itod(&sblock, n));
        off *= DEV_BSIZE;
        (void) llseek(f, off, 0);
        (void) read(f, (char *)buf, sblock.fs_bsize);
        j = itoo(&sblock, n);
        gen = buf[j].di_gen;
        memset(&buf[j], 0, ISIZE);
        buf[j].di_gen = gen + 1;
        (void) llseek(f, off, 0);
        (void) write(f, (char *)buf, sblock.fs_bsize);
    }
    if (status)
        return (status+31);
    (void) close(f);
    return (0);
}

static int
isnumber(const char *s)
{
    int c;

    while ((c = *s++) != '\0')
        if (c < '0' || c > '9')
            return (0);
    return (1);
}

static int
read_sb(int fd, const char *dev)
{
    (void) llseek(fd, (offset_t)(SBLOCK * DEV_BSIZE), 0);
    if (read(fd, &sblock, SBSIZE) != SBSIZE) {
        (void) printf("cannot read %s\n", dev);
        return (35);
    } else {
        return (0);
    }
}