/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#include "restore.h"
#include <byteorder.h>
#include <stdlib.h>
#include <unistd.h>
#include <utime.h>

struct context curfile;

/*
 * Symbol table of directories read from tape.
 */
#define HASHSIZE        1000
#define INOHASH(val) (val % HASHSIZE)
struct inotab {
        struct inotab *t_next;
        ino_t   t_ino;
        offset_t t_seekpt;
        offset_t t_size;
        struct inotab *t_xattr;
};
static struct inotab *inotab[HASHSIZE];
static struct inotab *xattrlist = NULL;

/*
 * Information retained about directories.
 */
static struct modeinfo {
        ino_t   ino;
        time_t  timep[2];
        mode_t  mode;
        uid_t   uid;
        gid_t   gid;
        size_t  metasize;
} node;

/*
 * Global variables for this file.
 */
static off64_t  g_seekpt;               /* some people have a local seekpt */
static FILE     *df, *mf;
static char     dirfile[MAXPATHLEN] = "#";      /* No file */
static char     modefile[MAXPATHLEN] = "#";     /* No file */

static RST_DIR  *dirp;

#define INIT_TEMPFILE(name, type) \
        if (name[0] == '#') { \
                if (tmpdir == (char *)NULL) /* can't happen; be paranoid */ \
                        tmpdir = "/tmp"; \
                (void) snprintf(name, sizeof (name), \
                    "%s/rst" type "%ld.XXXXXX", tmpdir, dumpdate); \
                (void) mktemp(name); \
        }

#define INIT_DIRFILE()  INIT_TEMPFILE(dirfile, "dir")
#define INIT_MODEFILE() INIT_TEMPFILE(modefile, "mode")

/*
 * Format of old style directories.
 */
#define ODIRSIZ 14
struct odirect {
        ushort_t d_ino;
        char    d_name[ODIRSIZ];
};

static ino_t search(ino_t, char *);
static void putdir(char *, size_t);
static void putent(struct direct *);
static void skipmetadata(FILE *, size_t);
static void flushent(void);
static void dcvt(struct odirect *, struct direct *);
static RST_DIR *rst_initdirfile(char *);
static offset_t rst_telldir(RST_DIR *);
static void rst_seekdir(RST_DIR *, offset_t, offset_t);
static struct inotab *allocinotab(ino_t, struct dinode *, off64_t);
static void nodeflush(void);
static struct inotab *inotablookup(ino_t);

/*
 *      Extract directory contents, building up a directory structure
 *      on disk for extraction by name.
 *      If genmode is requested, save mode, owner, and times for all
 *      directories on the tape.
 */
void
extractdirs(int genmode)
{
        int ts;
        struct dinode *ip;
        int saverr;
        struct inotab *itp;
        struct direct nulldir;
        static char dotname[] = "."; /* dirlookup/psearch writes to its arg */

        vprintf(stdout, gettext("Extract directories from tape\n"));
        INIT_DIRFILE();
        if ((df = safe_fopen(dirfile, "w", 0600)) == (FILE *)NULL) {
                saverr = errno;
                (void) fprintf(stderr,
                    gettext("%s: %s - cannot create directory temporary\n"),
                    progname, dirfile);
                errno = saverr;
                perror("fopen");
                done(1);
        }
        if (genmode != 0) {
                INIT_MODEFILE();
                if ((mf = safe_fopen(modefile, "w", 0600)) == (FILE *)NULL) {
                        saverr = errno;
                        (void) fprintf(stderr,
                            gettext("%s: %s - cannot create modefile \n"),
                            progname, modefile);
                        errno = saverr;
                        perror("fopen");
                        done(1);
                }
        }
        nulldir.d_ino = 0;
        nulldir.d_namlen = 1;
        (void) strcpy(nulldir.d_name, "/");
        /* LINTED DIRSIZ will always fit into a ushort_t */
        nulldir.d_reclen = (ushort_t)DIRSIZ(&nulldir);
        /* LINTED sign extension ok in assert */
        assert(DIRSIZ(&nulldir) == (ulong_t)nulldir.d_reclen);
        for (;;) {
                curfile.name = gettext("<directory file - name unknown>");
                curfile.action = USING;
                ip = curfile.dip;
                ts = curfile.ts;
                if (ts != TS_END && ts != TS_INODE) {
                        getfile(null, null);
                        continue;
                }
                if (ts == TS_INODE && ip == NULL) {
                        (void) fprintf(stderr, gettext(
"%s: extractdirs: Failed internal consistency check, curfile.dip is NULL\n"),
                            progname);
                        done(1);
                }
                if ((ts == TS_INODE && (ip->di_mode & IFMT) != IFDIR &&
                    (ip->di_mode & IFMT) != IFATTRDIR) ||
                    (ts == TS_END)) {
                        (void) fflush(df);
                        /* XXX Legitimate error, bad complaint string */
                        if (ferror(df))
                                panic("%s: %s\n", dirfile, strerror(errno));
                        (void) fclose(df);
                        rst_closedir(dirp);
                        dirp = rst_initdirfile(dirfile);
                        if (dirp == NULL)
                                perror("initdirfile");
                        if (mf != NULL) {
                                (void) fflush(mf);
                                /* XXX Legitimate error, bad complaint string */
                                if (ferror(mf))
                                        panic("%s: %s\n",
                                            modefile, strerror(errno));
                                (void) fclose(mf);
                        }
                        if (dirlookup(dotname) == 0) {
                                (void) fprintf(stderr, gettext(
                                    "Root directory is not on tape\n"));
                                done(1);
                        }
                        return;
                }
                itp = allocinotab(curfile.ino, ip, g_seekpt);
                getfile(putdir, null);
                if (mf != NULL)
                        nodeflush();

                putent(&nulldir);
                flushent();
                itp->t_size = g_seekpt - itp->t_seekpt;
        }
}

/*
 * skip over all the directories on the tape
 */
void
skipdirs()
{
        while (curfile.dip != NULL &&
            ((curfile.dip->di_mode & IFMT) == IFDIR ||
            (curfile.dip->di_mode & IFMT) == IFATTRDIR)) {
                skipfile();
        }
}

/*
 *      Recursively find names and inumbers of all files in subtree
 *      pname and pass them off to be processed.
 */
void
treescan(char *pname, ino_t ino, long (*todo)())
{
        struct inotab *itp;
        struct direct *dp;
        uint_t loclen;
        offset_t bpt;
        char locname[MAXCOMPLEXLEN];

        itp = inotablookup(ino);
        if (itp == NULL) {
                /*
                 * Pname is name of a simple file or an unchanged directory.
                 */
                (void) (*todo)(pname, ino, LEAF);
                return;
        }
        /*
         * Pname is a dumped directory name.
         */
        if ((*todo)(pname, ino, NODE) == FAIL)
                return;
        /*
         * begin search through the directory
         * skipping over "." and ".."
         */
        loclen = complexcpy(locname, pname, MAXCOMPLEXLEN);
        locname[loclen-1] = '/';
        rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
        dp = rst_readdir(dirp); /* "." */

        if (dp != NULL && strcmp(dp->d_name, ".") == 0)
                dp = rst_readdir(dirp); /* ".." */
        else
                (void) fprintf(stderr,
                    gettext("Warning: `.' missing from directory %s\n"),
                    pname);
        if (dp != NULL && strcmp(dp->d_name, "..") == 0)
                dp = rst_readdir(dirp); /* first real entry */
        else
                (void) fprintf(stderr,
                    gettext("Warning: `..' missing from directory %s\n"),
                    pname);
        bpt = rst_telldir(dirp);
        /*
         * a zero inode signals end of directory
         */
        while (dp != NULL && dp->d_ino != 0) {
                locname[loclen] = '\0';
                if ((loclen + dp->d_namlen) >= (sizeof (locname) - 2)) {
                        (void) fprintf(stderr,
                            gettext(
                            "%s%s: ignoring name that exceeds %d char\n"),
                            locname, dp->d_name, MAXCOMPLEXLEN);
                } else {
                        /* Always fits by if() condition */
                        (void) strcpy(locname + loclen, dp->d_name);
                        /* put a double null on string for lookupname() */
                        locname[loclen+dp->d_namlen+1] = '\0';
                        treescan(locname, dp->d_ino, todo);
                        rst_seekdir(dirp, bpt, itp->t_seekpt);
                }
                dp = rst_readdir(dirp);
                bpt = rst_telldir(dirp);
        }
        if (dp == NULL)
                (void) fprintf(stderr,
                    gettext("corrupted directory: %s.\n"), locname);
}

/*
 * Scan the directory table looking for extended attribute trees.
 * Recursively find names and inumbers in each tree and pass them
 * off to be processed.  If the always parameter is not set, only
 * process the attribute tree if the attribute tree parent is to
 * be extracted.
 */
void
attrscan(int always, long (*todo)())
{
        struct inotab *itp;
        struct entry *ep, *parent;
        struct direct *dp;
        char name[MAXCOMPLEXLEN];
        int len;

        for (itp = xattrlist; itp != NULL; itp = itp->t_xattr) {
                rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
                if ((dp = rst_readdir(dirp)) != NULL && /* "." */
                    (dp = rst_readdir(dirp)) != NULL && /* ".." */
                    strcmp(dp->d_name, "..") == 0) {
                        if ((parent = lookupino(dp->d_ino)) != NULL) {
                                if (!always &&
                                    (parent->e_flags & (NEW|EXTRACT)) == 0)
                                        continue;
                                len = complexcpy(name, myname(parent),
                                    MAXCOMPLEXLEN - 3);
                                name[len] = '.';
                                name[len+1] = '\0';
                                name[len+2] = '\0';
                                inattrspace = 1;
                                if ((ep = lookupino(itp->t_ino)) == NULL) {
                                        ep = addentry(name, itp->t_ino,
                                            NODE|ROOT);
                                }
                                ep->e_flags |= XATTRROOT;
                                treescan(name, itp->t_ino, todo);
                                inattrspace = 0;
                        } else {
                                (void) fprintf(stderr,
                                    gettext("Warning: orphaned attribute "
                                    "directory\n"));
                        }
                } else {
                        (void) fprintf(stderr, gettext("Warning: `..' missing "
                            "from attribute directory\n"));
                }
        }
}

/*
 * Search the directory tree rooted at inode ROOTINO
 * for the path pointed at by n.  Note that n must be
 * modifiable, although it is returned in the same
 * condition it was given to us in.
 */
ino_t
psearch(char *n)
{
        char *cp, *cp1;
        ino_t ino;
        char c;

        ino = ROOTINO;
        if (*(cp = n) == '/')
                cp++;
next:
        cp1 = cp + 1;
        while (*cp1 != '/' && *cp1)
                cp1++;
        c = *cp1;
        *cp1 = 0;
        ino = search(ino, cp);
        if (ino == 0) {
                *cp1 = c;
                return (0);
        }
        *cp1 = c;
        if (c == '/') {
                cp = cp1+1;
                goto next;
        }
        return (ino);
}

/*
 * search the directory inode ino
 * looking for entry cp
 */
static ino_t
search(ino_t inum, char *cp)
{
        struct direct *dp;
        struct inotab *itp;
        uint_t len;

        itp = inotablookup(inum);
        if (itp == NULL)
                return (0);
        rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
        len = strlen(cp);
        do {
                dp = rst_readdir(dirp);
                if (dp == NULL || dp->d_ino == 0)
                        return (0);
        } while (dp->d_namlen != len || strncmp(dp->d_name, cp, len) != 0);
        return (dp->d_ino);
}

/*
 * Put the directory entries in the directory file
 */
static void
putdir(char *buf, size_t size)
{
        struct direct cvtbuf;
        struct odirect *odp;
        struct odirect *eodp;
        struct direct *dp;
        size_t loc, i;

        if (cvtflag) {
                /*LINTED [buf is char[] in getfile, size % fs_fsize == 0]*/
                eodp = (struct odirect *)&buf[size];
                /*LINTED [buf is char[] in getfile]*/
                for (odp = (struct odirect *)buf; odp < eodp; odp++)
                        if (odp->d_ino != 0) {
                                dcvt(odp, &cvtbuf);
                                putent(&cvtbuf);
                        }
        } else {
                loc = 0;
                while (loc < size) {
                        /*LINTED [buf is char[] in getfile, loc % 4 == 0]*/
                        dp = (struct direct *)(buf + loc);
                        normdirect(byteorder, dp);
                        i = DIRBLKSIZ - (loc & (DIRBLKSIZ - 1));
                        if (dp->d_reclen == 0 || (long)dp->d_reclen > i) {
                                loc += i;
                                continue;
                        }
                        loc += dp->d_reclen;
                        if (dp->d_ino != 0) {
                                putent(dp);
                        }
                }
        }
}

/*
 * These variables are "local" to the following two functions.
 */
static char dirbuf[DIRBLKSIZ];
static int32_t dirloc = 0;
static int32_t prev = 0;

/*
 * add a new directory entry to a file.
 */
static void
putent(struct direct *dp)
{
        /* LINTED DIRSIZ will always fit in a ushort_t */
        dp->d_reclen = (ushort_t)DIRSIZ(dp);
        /* LINTED sign extension ok in assert */
        assert(DIRSIZ(dp) == (ulong_t)dp->d_reclen);
        if (dirloc + (long)dp->d_reclen > DIRBLKSIZ) {
                /*LINTED [prev += dp->d_reclen, prev % 4 == 0]*/
                ((struct direct *)(dirbuf + prev))->d_reclen =
                    DIRBLKSIZ - prev;
                (void) fwrite(dirbuf, 1, DIRBLKSIZ, df);
                if (ferror(df))
                        panic("%s: %s\n", dirfile, strerror(errno));
                dirloc = 0;
        }
        bcopy((char *)dp, dirbuf + dirloc, (size_t)dp->d_reclen);
        prev = dirloc;
        dirloc += dp->d_reclen;
}

/*
 * flush out a directory that is finished.
 */
static void
flushent(void)
{

        /* LINTED prev += dp->d_reclen, prev % 4 == 0 */
        ((struct direct *)(dirbuf + prev))->d_reclen = DIRBLKSIZ - prev;
        (void) fwrite(dirbuf, (size_t)dirloc, 1, df);
        if (ferror(df))
                panic("%s: %s\n", dirfile, strerror(errno));
        g_seekpt = ftello64(df);
        dirloc = 0;
}

static void
dcvt(struct odirect *odp, struct direct *ndp)
{

        (void) bzero((char *)ndp, sizeof (*ndp));
        ndp->d_ino =  odp->d_ino;
        /* Note that odp->d_name may not be null-terminated */
        /* LINTED assertion always true */
        assert(sizeof (ndp->d_name) > sizeof (odp->d_name));
        (void) strncpy(ndp->d_name, odp->d_name, sizeof (odp->d_name));
        ndp->d_name[sizeof (odp->d_name)] = '\0';
        /* LINTED: strlen will fit into d_namlen */
        ndp->d_namlen = strlen(ndp->d_name);

        /* LINTED sign extension ok in assert */
        assert(DIRSIZ(ndp) == (ulong_t)ndp->d_reclen);
        /* LINTED DIRSIZ always fits in ushort_t */
        ndp->d_reclen = (ushort_t)DIRSIZ(ndp);
}

/*
 * Initialize the directory file
 */
static RST_DIR *
rst_initdirfile(char *name)
{
        RST_DIR *dp;
        int fd;

        if ((fd = open(name, O_RDONLY | O_LARGEFILE)) == -1)
                return ((RST_DIR *)0);
        if ((dp = (RST_DIR *)malloc(sizeof (*dp))) == NULL) {
                (void) close(fd);
                return ((RST_DIR *)0);
        }
        dp->dd_fd = fd;
        dp->dd_loc = 0;
        dp->dd_refcnt = 1;
        return (dp);
}

/*
 * Simulate the opening of a directory
 */
RST_DIR *
rst_opendir(char *name)
{
        struct inotab *itp;
        ino_t ino;

        if ((ino = dirlookup(name)) > 0 &&
            (itp = inotablookup(ino)) != NULL) {
                rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
                dirp->dd_refcnt++;
                return (dirp);
        }
        return ((RST_DIR *)0);
}

/*
 * Releases the hidden state created by rst_opendir().
 * Specifically, the dirp it provided to the caller is malloc'd.
 */
void
rst_closedir(RST_DIR *cdirp)
{
        if ((cdirp != NULL) && (--(cdirp->dd_refcnt) < 1))
                free(cdirp);
}

/*
 * return a pointer into a directory
 */
static offset_t
rst_telldir(RST_DIR *tdirp)
{
        offset_t pos = llseek(tdirp->dd_fd, (offset_t)0, SEEK_CUR);

        if (pos == (offset_t)-1) {
                perror("Could not determine position in directory file");
                done(1);
        }

        return ((pos - tdirp->dd_size) + tdirp->dd_loc);
}

/*
 * Seek to an entry in a directory.
 * Only values returned by ``rst_telldir'' should be passed to rst_seekdir.
 * This routine handles many directories in a single file.
 * It takes the base of the directory in the file, plus
 * the desired seek offset into it.
 */
static void
rst_seekdir(RST_DIR *sdirp, offset_t loc, offset_t base)
{

        if (loc == rst_telldir(sdirp))
                return;
        loc -= base;
        if (loc < 0)
                (void) fprintf(stderr,
                    gettext("bad seek pointer to rst_seekdir %d\n"), loc);
        (void) llseek(sdirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), 0);
        sdirp->dd_loc = loc & (DIRBLKSIZ - 1);
        if (sdirp->dd_loc != 0)
                sdirp->dd_size = read(sdirp->dd_fd, sdirp->dd_buf, DIRBLKSIZ);
}

/*
 * get next entry in a directory.
 */
struct direct *
rst_readdir(RST_DIR *rdirp)
{
        struct direct *dp;

        for (;;) {
                if (rdirp->dd_loc == 0) {
                        rdirp->dd_size = read(rdirp->dd_fd, rdirp->dd_buf,
                            DIRBLKSIZ);
                        if (rdirp->dd_size <= 0) {
                                dprintf(stderr,
                                    gettext("error reading directory\n"));
                                return ((struct direct *)0);
                        }
                }
                if (rdirp->dd_loc >= rdirp->dd_size) {
                        rdirp->dd_loc = 0;
                        continue;
                }
                /*LINTED [rvalue will be aligned on int boundary]*/
                dp = (struct direct *)(rdirp->dd_buf + rdirp->dd_loc);
                if (dp->d_reclen == 0 ||
                    (long)dp->d_reclen > (DIRBLKSIZ + 1 - rdirp->dd_loc)) {
                        dprintf(stderr,
                            gettext("corrupted directory: bad reclen %d\n"),
                            dp->d_reclen);
                        return ((struct direct *)0);
                }
                rdirp->dd_loc += dp->d_reclen;
                if (dp->d_ino == 0 && strcmp(dp->d_name, "/") != 0)
                        continue;
                if ((ino_t)(dp->d_ino) >= maxino) {
                        dprintf(stderr,
                            gettext("corrupted directory: bad inum %lu\n"),
                            dp->d_ino);
                        continue;
                }
                return (dp);
        }
}

/*
 * Set the mode, owner, and times for all new or changed directories
 */
void
setdirmodes(void)
{
        FILE *smf;
        struct entry *ep;
        char *cp, *metadata = NULL;
        size_t metasize = 0;
        int override = -1;
        int saverr;
        static int complained_chown = 0;
        static int complained_chmod = 0;
        int dfd;

        vprintf(stdout, gettext("Set directory mode, owner, and times.\n"));
        /* XXX if modefile[0] == '#', shouldn't we just bail here? */
        /* XXX why isn't it set already? */
        INIT_MODEFILE();
        smf = fopen64(modefile, "r");
        if (smf == NULL) {
                perror("fopen");
                (void) fprintf(stderr,
                    gettext("cannot open mode file %s\n"), modefile);
                (void) fprintf(stderr,
                    gettext("directory mode, owner, and times not set\n"));
                return;
        }
        clearerr(smf);
        for (;;) {
                (void) fread((char *)&node, 1, sizeof (node), smf);
                if (feof(smf))
                        break;
                ep = lookupino(node.ino);
                if (command == 'i' || command == 'x') {
                        if (ep == NIL) {
                                skipmetadata(smf, node.metasize);
                                continue;
                        }
                        if (ep->e_flags & EXISTED) {
                                if (override < 0) {
                                        if (reply(gettext(
                                "Directories already exist, set modes anyway"))
                                            == FAIL)
                                                override = 0;
                                        else
                                                override = 1;
                                }
                                if (override == 0) {
                                        /* LINTED: result fits into short */
                                        ep->e_flags &= ~NEW;
                                        skipmetadata(smf, node.metasize);
                                        continue;
                                }
                        }
                        if (node.ino == ROOTINO &&
                            reply(gettext("set owner/mode for '.'")) == FAIL) {
                                skipmetadata(smf, node.metasize);
                                continue;
                        }
                }
                if (ep == NIL) {
                        panic(gettext("cannot find directory inode %d\n"),
                            node.ino);
                        skipmetadata(smf, node.metasize);
                        continue;
                }
                cp = myname(ep);
                resolve(myname(ep), &dfd, &cp);
                if (dfd != AT_FDCWD) {
                        if (fchdir(dfd) < 0) {
                                saverr = errno;
                                (void) fprintf(stderr,
                                gettext("Can not set attribute context: %s\n"),
                                    strerror(saverr));
                                (void) close(dfd);
                                continue;
                        }
                }
                if (chmod(cp, node.mode) < 0 && !complained_chmod) {
                        saverr = errno;
                        (void) fprintf(stderr,
                        gettext("Can not set directory permissions: %s\n"),
                            strerror(saverr));
                        complained_chmod = 1;
                }
                if (node.metasize != 0) {
                        if (node.metasize > metasize)
                                metadata = realloc(metadata,
                                    metasize = node.metasize);
                        if (metadata == NULL) {
                                (void) fprintf(stderr,
                                    gettext("Cannot malloc metadata\n"));
                                done(1);
                        }
                        (void) fread(metadata, 1, node.metasize, smf);
                        metaproc(cp, metadata, node.metasize);
                }

                /*
                 * BUG 4302943
                 * Since the ACLs must be set before fixing the ownership,
                 * chown should be called only after metaproc
                 */
                if (chown(cp, node.uid, node.gid) < 0 && !complained_chown) {
                        saverr = errno;
                        (void) fprintf(stderr,
                            gettext("Can not set directory ownership: %s\n"),
                            strerror(saverr));
                        complained_chown = 1;
                }
                utime(cp, (struct utimbuf *)node.timep);
                /* LINTED: result fits into short */
                ep->e_flags &= ~NEW;
                if (dfd != AT_FDCWD) {
                        fchdir(savepwd);
                        (void) close(dfd);
                }
        }
        if (ferror(smf))
                panic(gettext("error setting directory modes\n"));
        if (metadata != NULL)
                (void) free(metadata);
        (void) fclose(smf);
}

void
skipmetadata(FILE *f, size_t size)
{
        /* XXX should we bail if this doesn't work? */
        /* LINTED unsigned -> signed conversion ok here */
        (void) fseeko(f, (off_t)size, SEEK_CUR);
}

/*
 * Generate a literal copy of a directory.
 */
int
genliteraldir(char *name, ino_t ino)
{
        struct inotab *itp;
        int ofile, dp;
        off64_t i;
        size_t size;
        char buf[BUFSIZ];

        itp = inotablookup(ino);
        if (itp == NULL) {
                (void) fprintf(stderr,
                    gettext("Cannot find directory inode %d named %s\n"),
                    ino, name);
                return (FAIL);
        }
        if ((ofile = creat(name, 0666)) < 0) {
                (void) fprintf(stderr, "%s: ", name);
                (void) fflush(stderr);
                perror(gettext("cannot create file"));
                return (FAIL);
        }
        rst_seekdir(dirp, itp->t_seekpt, itp->t_seekpt);
        dp = dup(dirp->dd_fd);
        if (dp < 0) {
                perror(gettext("dup(2) failed"));
                (void) close(ofile);
                (void) unlink(name);
                return (FAIL);
        }
        for (i = itp->t_size; i != 0; i -= size) {
                /* LINTED cast is safe due to comparison */
                size = i < BUFSIZ ? (size_t)i : BUFSIZ;
                /* XXX instead of done(), clean up and return FAIL? */
                if (read(dp, buf, size) == -1) {
                        (void) fprintf(stderr, gettext(
                            "read error extracting inode %d, name %s\n"),
                            curfile.ino, curfile.name);
                        perror("read");
                        done(1);
                }
                if (write(ofile, buf, size) == -1) {
                        (void) fprintf(stderr, gettext(
                            "write error extracting inode %d, name %s\n"),
                            curfile.ino, curfile.name);
                        perror("write");
                        done(1);
                }
        }
        (void) close(dp);
        (void) close(ofile);
        return (GOOD);
}

/*
 * Determine the type of an inode
 */
int
inodetype(ino_t ino)
{
        struct inotab *itp;

        itp = inotablookup(ino);
        if (itp == NULL)
                return (LEAF);
        return (NODE);
}

/*
 * Allocate and initialize a directory inode entry.
 * If requested, save its pertinent mode, owner, and time info.
 */
static struct inotab *
allocinotab(ino_t ino, struct dinode *dip, off64_t seekpt)
{
        struct inotab   *itp;

        itp = (struct inotab *)calloc(1, sizeof (*itp));
        if (itp == 0) {
                (void) fprintf(stderr,
                    gettext("no memory for directory table\n"));
                done(1);
        }
        itp->t_next = inotab[INOHASH(ino)];
        inotab[INOHASH(ino)] = itp;
        itp->t_ino = ino;
        itp->t_seekpt = seekpt;
        if ((dip->di_mode & IFMT) == IFATTRDIR) {
                itp->t_xattr = xattrlist;
                xattrlist = itp;
        }
        if (mf == NULL)
                return (itp);
        node.ino = ino;
        node.timep[0] = dip->di_atime;
        node.timep[1] = dip->di_mtime;
        node.mode = dip->di_mode;
        node.uid =
            dip->di_suid == UID_LONG ? dip->di_uid : (uid_t)dip->di_suid;
        node.gid =
            dip->di_sgid == GID_LONG ? dip->di_gid : (gid_t)dip->di_sgid;
        return (itp);
}

void
nodeflush()
{
        char *metadata;

        if (mf == NULL) {
                (void) fprintf(stderr, gettext(
                    "Inconsistency detected: modefile pointer is NULL\n"));
                done(1);
        }
        metaget(&metadata, &(node.metasize));
        (void) fwrite((char *)&node, 1, sizeof (node), mf);
        if (node.metasize != 0)
                (void) fwrite(metadata, 1, node.metasize, mf);
        if (ferror(mf))
                panic("%s: %s\n", modefile, strerror(errno));
}

/*
 * Look up an inode in the table of directories
 */
static struct inotab *
inotablookup(ino_t ino)
{
        struct inotab *itp;

        for (itp = inotab[INOHASH(ino)]; itp != NULL; itp = itp->t_next)
                if (itp->t_ino == ino)
                        return (itp);
        return ((struct inotab *)0);
}

/*
 * Clean up and exit
 */
void
done(int exitcode)
{
        closemt(ALLOW_OFFLINE);         /* don't force offline on exit */
        if (modefile[0] != '#')
                (void) unlink(modefile);
        if (dirfile[0] != '#')
                (void) unlink(dirfile);
        exit(exitcode);
}