+#ifndef lint
+static char version[] = "@(#)dir.c 3.1 (Berkeley) %G%";
+#endif
+
+#include <sys/param.h>
+#include <sys/inode.h>
+#include <sys/fs.h>
+#define KERNEL
+#include <sys/dir.h>
+#undef KERNEL
+#include "fsck.h"
+
+#define MINDIRSIZE (sizeof (struct dirtemplate))
+
+char *endpathname = &pathname[BUFSIZ - 2];
+char *lfname = "lost+found";
+
+DIRECT *fsck_readdir();
+
+descend(parentino, inumber)
+ struct inodesc *parentino;
+ ino_t inumber;
+{
+ register DINODE *dp;
+ struct inodesc curino;
+
+ bzero((char *)&curino, sizeof(struct inodesc));
+ statemap[inumber] = FSTATE;
+ if ((dp = ginode(inumber)) == NULL)
+ return;
+ if (dp->di_size == 0) {
+ direrr(inumber, "ZERO LENGTH DIRECTORY");
+ if (reply("REMOVE") == 1)
+ statemap[inumber] = CLEAR;
+ return;
+ }
+ if (dp->di_size < MINDIRSIZE) {
+ direrr(inumber, "DIRECTORY TOO SHORT");
+ dp->di_size = MINDIRSIZE;
+ if (reply("FIX") == 1)
+ inodirty();
+ }
+ curino.id_type = DATA;
+ curino.id_func = parentino->id_func;
+ curino.id_parent = parentino->id_number;
+ curino.id_number = inumber;
+ curino.id_filesize = dp->di_size;
+ (void)ckinode(dp, &curino);
+}
+
+dirscan(idesc)
+ register struct inodesc *idesc;
+{
+ register DIRECT *dp;
+ int dsize, n;
+ long blksiz;
+ char dbuf[DIRBLKSIZ];
+
+ if (idesc->id_type != DATA)
+ errexit("wrong type to dirscan %d\n", idesc->id_type);
+ blksiz = idesc->id_numfrags * sblock.fs_fsize;
+ if (outrange(idesc->id_blkno, idesc->id_numfrags)) {
+ idesc->id_filesize -= blksiz;
+ return (SKIP);
+ }
+ idesc->id_loc = 0;
+ for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) {
+ dsize = dp->d_reclen;
+ bcopy((char *)dp, dbuf, dsize);
+ idesc->id_dirp = (DIRECT *)dbuf;
+ if ((n = (*idesc->id_func)(idesc)) & ALTERED) {
+ if (getblk(&fileblk, idesc->id_blkno, blksiz) != NULL) {
+ bcopy(dbuf, (char *)dp, dsize);
+ dirty(&fileblk);
+ sbdirty();
+ } else
+ n &= ~ALTERED;
+ }
+ if (n & STOP)
+ return (n);
+ }
+ return (idesc->id_filesize > 0 ? KEEPON : STOP);
+}
+
+/*
+ * get next entry in a directory.
+ */
+DIRECT *
+fsck_readdir(idesc)
+ register struct inodesc *idesc;
+{
+ register DIRECT *dp, *ndp;
+ long size, blksiz;
+
+ blksiz = idesc->id_numfrags * sblock.fs_fsize;
+ if (getblk(&fileblk, idesc->id_blkno, blksiz) == NULL) {
+ idesc->id_filesize -= blksiz - idesc->id_loc;
+ return NULL;
+ }
+ if (idesc->id_loc % DIRBLKSIZ == 0 && idesc->id_filesize > 0 &&
+ idesc->id_loc < blksiz) {
+ dp = (DIRECT *)(dirblk.b_buf + idesc->id_loc);
+ if (dircheck(idesc, dp))
+ goto dpok;
+ idesc->id_loc += DIRBLKSIZ;
+ idesc->id_filesize -= DIRBLKSIZ;
+ dp->d_reclen = DIRBLKSIZ;
+ dp->d_ino = 0;
+ dp->d_namlen = 0;
+ dp->d_name[0] = '\0';
+ if (dofix(idesc))
+ dirty(&fileblk);
+ return (dp);
+ }
+dpok:
+ if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz)
+ return NULL;
+ dp = (DIRECT *)(dirblk.b_buf + idesc->id_loc);
+ idesc->id_loc += dp->d_reclen;
+ idesc->id_filesize -= dp->d_reclen;
+ if ((idesc->id_loc % DIRBLKSIZ) == 0)
+ return (dp);
+ ndp = (DIRECT *)(dirblk.b_buf + idesc->id_loc);
+ if (idesc->id_loc < blksiz && idesc->id_filesize > 0 &&
+ dircheck(idesc, ndp) == 0) {
+ size = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
+ dp->d_reclen += size;
+ idesc->id_loc += size;
+ idesc->id_filesize -= size;
+ if (dofix(idesc))
+ dirty(&fileblk);
+ }
+ return (dp);
+}
+
+/*
+ * Verify that a directory entry is valid.
+ * This is a superset of the checks made in the kernel.
+ */
+dircheck(idesc, dp)
+ struct inodesc *idesc;
+ register DIRECT *dp;
+{
+ register int size;
+ register char *cp;
+ int spaceleft;
+
+ size = DIRSIZ(dp);
+ spaceleft = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ);
+ if (dp->d_ino < imax &&
+ dp->d_reclen != 0 &&
+ dp->d_reclen <= spaceleft &&
+ (dp->d_reclen & 0x3) == 0 &&
+ dp->d_reclen >= size &&
+ idesc->id_filesize >= size &&
+ dp->d_namlen <= MAXNAMLEN) {
+ if (dp->d_ino == 0)
+ return (1);
+ for (cp = dp->d_name, size = 0; size < dp->d_namlen; size++)
+ if (*cp == 0 || (*cp++ & 0200))
+ return (0);
+ if (*cp == 0)
+ return (1);
+ }
+ return (0);
+}
+
+direrr(ino, s)
+ ino_t ino;
+ char *s;
+{
+ register DINODE *dp;
+
+ pwarn("%s ", s);
+ pinode(ino);
+ printf("\n");
+ if ((dp = ginode(ino)) != NULL && ftypeok(dp))
+ pfatal("%s=%s\n", DIRCT?"DIR":"FILE", pathname);
+ else
+ pfatal("NAME=%s\n", pathname);
+}
+
+adjust(idesc, lcnt)
+ register struct inodesc *idesc;
+ short lcnt;
+{
+ register DINODE *dp;
+
+ if ((dp = ginode(idesc->id_number)) == NULL)
+ return;
+ if (dp->di_nlink == lcnt) {
+ if (linkup(idesc->id_number, (ino_t)0) == 0)
+ clri(idesc, "UNREF", 0);
+ }
+ else {
+ pwarn("LINK COUNT %s",
+ (lfdir==idesc->id_number)?lfname:(DIRCT?"DIR":"FILE"));
+ pinode(idesc->id_number);
+ printf(" COUNT %d SHOULD BE %d",
+ dp->di_nlink, dp->di_nlink-lcnt);
+ if (preen) {
+ if (lcnt < 0) {
+ printf("\n");
+ preendie();
+ }
+ printf(" (ADJUSTED)\n");
+ }
+ if (preen || reply("ADJUST") == 1) {
+ dp->di_nlink -= lcnt;
+ inodirty();
+ }
+ }
+}
+
+mkentry(idesc)
+ struct inodesc *idesc;
+{
+ register DIRECT *dirp = idesc->id_dirp;
+ DIRECT newent;
+ int newlen, oldlen;
+
+ newent.d_namlen = 11;
+ newlen = DIRSIZ(&newent);
+ if (dirp->d_ino != 0)
+ oldlen = DIRSIZ(dirp);
+ else
+ oldlen = 0;
+ if (dirp->d_reclen - oldlen < newlen)
+ return (KEEPON);
+ newent.d_reclen = dirp->d_reclen - oldlen;
+ dirp->d_reclen = oldlen;
+ dirp = (struct direct *)(((char *)dirp) + oldlen);
+ dirp->d_ino = idesc->id_parent; /* ino to be entered is in id_parent */
+ dirp->d_reclen = newent.d_reclen;
+ dirp->d_namlen = lftempname(dirp->d_name, idesc->id_parent);
+ return (ALTERED|STOP);
+}
+
+chgdd(idesc)
+ struct inodesc *idesc;
+{
+ register DIRECT *dirp = idesc->id_dirp;
+
+ if (dirp->d_name[0] == '.' && dirp->d_name[1] == '.' &&
+ dirp->d_name[2] == 0) {
+ dirp->d_ino = lfdir;
+ return (ALTERED|STOP);
+ }
+ return (KEEPON);
+}
+
+linkup(orphan, pdir)
+ ino_t orphan;
+ ino_t pdir;
+{
+ register DINODE *dp;
+ int lostdir, len;
+ struct inodesc idesc;
+
+ bzero((char *)&idesc, sizeof(struct inodesc));
+ if ((dp = ginode(orphan)) == NULL)
+ return (0);
+ lostdir = DIRCT;
+ pwarn("UNREF %s ", lostdir ? "DIR" : "FILE");
+ pinode(orphan);
+ if (preen && dp->di_size == 0)
+ return (0);
+ if (preen)
+ printf(" (RECONNECTED)\n");
+ else
+ if (reply("RECONNECT") == 0)
+ return (0);
+ pathp = pathname;
+ *pathp++ = '/';
+ *pathp = '\0';
+ if (lfdir == 0) {
+ if ((dp = ginode(ROOTINO)) == NULL)
+ return (0);
+ srchname = lfname;
+ idesc.id_type = DATA;
+ idesc.id_func = findino;
+ idesc.id_number = ROOTINO;
+ idesc.id_filesize = dp->di_size;
+ (void)ckinode(dp, &idesc);
+ if ((lfdir = idesc.id_parent) == 0) {
+ pfatal("SORRY. NO lost+found DIRECTORY");
+ printf("\n\n");
+ return (0);
+ }
+ }
+ if ((dp = ginode(lfdir)) == NULL ||
+ !DIRCT || statemap[lfdir] != FSTATE) {
+ pfatal("SORRY. NO lost+found DIRECTORY");
+ printf("\n\n");
+ return (0);
+ }
+ if (fragoff(&sblock, dp->di_size)) {
+ dp->di_size = fragroundup(&sblock, dp->di_size);
+ inodirty();
+ }
+ len = strlen(lfname);
+ bcopy(lfname, pathp, len + 1);
+ pathp += len;
+ idesc.id_type = DATA;
+ idesc.id_func = mkentry;
+ idesc.id_number = lfdir;
+ idesc.id_filesize = dp->di_size;
+ idesc.id_parent = orphan; /* this is the inode to enter */
+ idesc.id_fix = DONTKNOW;
+ if ((ckinode(dp, &idesc) & ALTERED) == 0) {
+ pfatal("SORRY. NO SPACE IN lost+found DIRECTORY");
+ printf("\n\n");
+ return (0);
+ }
+ lncntp[orphan]--;
+ *pathp++ = '/';
+ pathp += lftempname(pathp, orphan);
+ if (lostdir) {
+ dp = ginode(orphan);
+ idesc.id_type = DATA;
+ idesc.id_func = chgdd;
+ idesc.id_number = orphan;
+ idesc.id_filesize = dp->di_size;
+ idesc.id_fix = DONTKNOW;
+ (void)ckinode(dp, &idesc);
+ if ((dp = ginode(lfdir)) != NULL) {
+ dp->di_nlink++;
+ inodirty();
+ lncntp[lfdir]++;
+ }
+ pwarn("DIR I=%u CONNECTED. ", orphan);
+ printf("PARENT WAS I=%u\n", pdir);
+ if (preen == 0)
+ printf("\n");
+ }
+ return (1);
+}
+
+/*
+ * generate a temporary name for the lost+found directory.
+ */
+lftempname(bufp, ino)
+ char *bufp;
+ ino_t ino;
+{
+ register ino_t in;
+ register char *cp;
+ int namlen;
+
+ cp = bufp + 2;
+ for (in = imax; in > 0; in /= 10)
+ cp++;
+ *--cp = 0;
+ namlen = cp - bufp;
+ in = ino;
+ while (cp > bufp) {
+ *--cp = (in % 10) + '0';
+ in /= 10;
+ }
+ *cp = '#';
+ return (namlen);
+}
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