usr/src/sbin/fsck/main.c

/*
 * Copyright (c) 1980, 1986, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1980, 1986, 1993\n\
        The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)main.c      8.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/mount.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <fstab.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include "fsck.h"

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

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

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

                case 'b':
                        bflag = argtoi('b', "number", optarg, 10);
                        printf("Alternate super block location: %d\n", bflag);
                        break;

                case 'c':
                        cvtlevel = argtoi('c', "conversion level", optarg, 10);
                        break;

                case 'd':
                        debug++;
                        break;

                case 'l':
                        maxrun = argtoi('l', "number", optarg, 10);
                        break;

                case 'm':
                        lfmode = argtoi('m', "mode", optarg, 8);
                        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)
                        (void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
                exit(0);
        }
        ret = checkfstab(preen, maxrun, docheck, checkfilesys);
        if (returntosingle)
                exit(2);
        exit(ret);
}

argtoi(flag, req, str, base)
        int flag;
        char *req, *str;
        int base;
{
        char *cp;
        int ret;

        ret = (int)strtol(str, &cp, base);
        if (cp == str || *cp)
                errexit("-%c flag requires a %s\n", flag, req);
        return (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, child)
        char *filesys, *mntpt;
        long auxdata;
{
        daddr_t n_ffree, n_bfree;
        struct dups *dp;
        struct zlncnt *zlnp;
        int cylno;

        if (preen && child)
                (void)signal(SIGQUIT, voidquit);
        cdevname = 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("%ld files, %ld used, %ld free ",
            n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
        printf("(%ld frags, %ld blocks, %d.%d%% fragmentation)\n",
            n_ffree, n_bfree, (n_ffree * 100) / sblock.fs_dsize,
            ((n_ffree * 1000 + sblock.fs_dsize / 2) / sblock.fs_dsize) % 10);
        if (debug &&
            (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
                printf("%ld 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("%ld blocks missing\n", n_blks);
                if (duplist != NULL) {
                        printf("The following duplicate blocks remain:");
                        for (dp = duplist; dp; dp = dp->next)
                                printf(" %ld,", dp->dup);
                        printf("\n");
                }
                if (zlnhead != NULL) {
                        printf("The following zero link count inodes remain:");
                        for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
                                printf(" %lu,", zlnp->zlncnt);
                        printf("\n");
                }
        }
        zlnhead = (struct zlncnt *)0;
        duplist = (struct dups *)0;
        muldup = (struct dups *)0;
        inocleanup();
        if (fsmodified) {
                (void)time(&sblock.fs_time);
                sbdirty();
        }
        if (cvtlevel && sblk.b_dirty) {
                /*
                 * Write out the duplicate super blocks
                 */
                for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
                        bwrite(fswritefd, (char *)&sblock,
                            fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
        }
        ckfini();
        free(blockmap);
        free(statemap);
        free((char *)lncntp);
        if (!fsmodified)
                return (0);
        if (!preen)
                printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
        if (hotroot) {
                struct statfs stfs_buf;
                /*
                 * We modified the root.  Do a mount update on
                 * it, unless it is read-write, so we can continue.
                 */
                if (statfs("/", &stfs_buf) == 0) {
                        long flags = stfs_buf.f_flags;
                        struct ufs_args args;
                        int ret;

                        if (flags & MNT_RDONLY) {
                                args.fspec = 0;
                                args.exflags = 0;
                                args.exroot = 0;
                                flags |= MNT_UPDATE | MNT_RELOAD;
                                ret = mount(MOUNT_UFS, "/", flags, &args);
                                if (ret == 0)
                                        return(0);
                        }
                }
                if (!preen)
                        printf("\n***** REBOOT NOW *****\n");
                sync();
                return (4);
        }
        return (0);
}