usr/src/sbin/fsck/main.c

/*
 * Copyright (c) 1980, 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980, 1986 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)main.c      5.22 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <ufs/dinode.h>
#include <ufs/fs.h>
#include <fstab.h>
#include <strings.h>
#include <ctype.h>
#include <stdio.h>
#include "fsck.h"

void    catch(), catchquit(), voidquit();
int     returntosingle;

main(argc, argv)
        int     argc;
        char    *argv[];
{
        char ch;
        int ret, maxrun = 0;
        extern int docheck(), checkfilesys();
        extern char *optarg;
        extern int optind;

        sync();
        while ((ch = getopt(argc, argv, "cdpnNyYb:l:m:")) != EOF) {
                switch (ch) {
                case 'p':
                        preen++;
                        break;

                case 'b':
                        if (!isdigit(*optarg))
                                errexit("-b flag requires a number\n");
                        bflag = atoi(optarg);
                        printf("Alternate super block location: %d\n", bflag);
                        break;

                case 'c':
                        cvtflag++;
                        break;

                case 'd':
                        debug++;
                        break;

                case 'l':
                        if (!isdigit(*optarg))
                                errexit("-l flag requires a number\n");
                        maxrun = atoi(optarg);
                        break;

                case 'm':
                        if (!isdigit(*optarg))
                                errexit("-m flag requires a mode\n");
                        sscanf(optarg, "%o", &lfmode);
                        if (lfmode &~ 07777)
                                errexit("bad mode to -m: %o\n", lfmode);
                        printf("** lost+found creation mode %o\n", lfmode);
                        break;

                case 'n':
                case 'N':
                        nflag++;
                        yflag = 0;
                        break;

                case 'y':
                case 'Y':
                        yflag++;
                        nflag = 0;
                        break;

                default:
                        errexit("%c option?\n", ch);
                }
        }
        argc -= optind;
        argv += optind;
        if (signal(SIGINT, SIG_IGN) != SIG_IGN)
                (void)signal(SIGINT, catch);
        if (preen)
                (void)signal(SIGQUIT, catchquit);
        if (argc) {
                while (argc-- > 0)
                        checkfilesys(*argv++);
                exit(0);
        }
        ret = checkfstab(preen, maxrun, docheck, checkfilesys);
        if (returntosingle)
                exit(2);
        exit(ret);
}

/*
 * Determine whether a filesystem should be checked.
 */
docheck(fsp)
        register struct fstab *fsp;
{

        if (strcmp(fsp->fs_vfstype, "ufs") ||
            (strcmp(fsp->fs_type, FSTAB_RW) &&
             strcmp(fsp->fs_type, FSTAB_RO)) ||
            fsp->fs_passno == 0)
                return (0);
        return (1);
}

/*
 * Check the specified filesystem.
 */
/* ARGSUSED */
checkfilesys(filesys, mntpt, auxdata)
        char *filesys, *mntpt;
        long auxdata;
{
        daddr_t n_ffree, n_bfree;
        struct dups *dp;
        struct zlncnt *zlnp;

        (void)signal(SIGQUIT, voidquit);
        devname = filesys;
        if (debug && preen)
                pwarn("starting\n");
        if (setup(filesys) == 0) {
                if (preen)
                        pfatal("CAN'T CHECK FILE SYSTEM.");
                return (0);
        }
        /*
         * 1: scan inodes tallying blocks used
         */
        if (preen == 0) {
                printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
                if (hotroot)
                        printf("** Root file system\n");
                printf("** Phase 1 - Check Blocks and Sizes\n");
        }
        pass1();

        /*
         * 1b: locate first references to duplicates, if any
         */
        if (duplist) {
                if (preen)
                        pfatal("INTERNAL ERROR: dups with -p");
                printf("** Phase 1b - Rescan For More DUPS\n");
                pass1b();
        }

        /*
         * 2: traverse directories from root to mark all connected directories
         */
        if (preen == 0)
                printf("** Phase 2 - Check Pathnames\n");
        pass2();

        /*
         * 3: scan inodes looking for disconnected directories
         */
        if (preen == 0)
                printf("** Phase 3 - Check Connectivity\n");
        pass3();

        /*
         * 4: scan inodes looking for disconnected files; check reference counts
         */
        if (preen == 0)
                printf("** Phase 4 - Check Reference Counts\n");
        pass4();

        /*
         * 5: check and repair resource counts in cylinder groups
         */
        if (preen == 0)
                printf("** Phase 5 - Check Cyl groups\n");
        pass5();

        /*
         * print out summary statistics
         */
        n_ffree = sblock.fs_cstotal.cs_nffree;
        n_bfree = sblock.fs_cstotal.cs_nbfree;
        pwarn("%d files, %d used, %d free ",
            n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
        printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
            n_ffree, n_bfree, (float)(n_ffree * 100) / sblock.fs_dsize);
        if (debug &&
            (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
                printf("%d files missing\n", n_files);
        if (debug) {
                n_blks += sblock.fs_ncg *
                        (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
                n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
                n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
                if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
                        printf("%d blocks missing\n", n_blks);
                if (duplist != NULL) {
                        printf("The following duplicate blocks remain:");
                        for (dp = duplist; dp; dp = dp->next)
                                printf(" %d,", dp->dup);
                        printf("\n");
                }
                if (zlnhead != NULL) {
                        printf("The following zero link count inodes remain:");
                        for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
                                printf(" %d,", zlnp->zlncnt);
                        printf("\n");
                }
        }
        zlnhead = (struct zlncnt *)0;
        duplist = (struct dups *)0;
        inocleanup();
        if (fsmodified) {
                (void)time(&sblock.fs_time);
                sbdirty();
        }
        ckfini();
        free(blockmap);
        free(statemap);
        free((char *)lncntp);
        if (!fsmodified)
                return (0);
        if (!preen) {
                printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
                if (hotroot)
                        printf("\n***** REBOOT UNIX *****\n");
        }
        if (hotroot) {
                sync();
                return (4);
        }
        return (0);
}