initial import of NetBSD tree

1 files changed, 604 insertions, 0 deletions

diff --git a/sbin/fsck_ffs/utilities.c b/sbin/fsck_ffs/utilities.c
new file mode 100644
index 00000000000..74d2db5be1d
--- /dev/null
+++ b/sbin/fsck_ffs/utilities.c
@@ -0,0 +1,604 @@
+/*	$NetBSD: utilities.c,v 1.15 1995/04/23 10:33:09 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1980, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
+#else
+static char rcsid[] = "$NetBSD: utilities.c,v 1.15 1995/04/23 10:33:09 cgd Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <ufs/ufs/dinode.h>
+#include <ufs/ufs/dir.h>
+#include <ufs/ffs/fs.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+
+#include "fsck.h"
+#include "extern.h"
+
+long	diskreads, totalreads;	/* Disk cache statistics */
+
+int
+ftypeok(dp)
+	struct dinode *dp;
+{
+	switch (dp->di_mode & IFMT) {
+
+	case IFDIR:
+	case IFREG:
+	case IFBLK:
+	case IFCHR:
+	case IFLNK:
+	case IFSOCK:
+	case IFIFO:
+		return (1);
+
+	default:
+		if (debug)
+			printf("bad file type 0%o\n", dp->di_mode);
+		return (0);
+	}
+}
+
+int
+reply(question)
+	char *question;
+{
+	int persevere;
+	char c;
+
+	if (preen)
+		pfatal("INTERNAL ERROR: GOT TO reply()");
+	persevere = !strcmp(question, "CONTINUE");
+	printf("\n");
+	if (!persevere && (nflag || fswritefd < 0)) {
+		printf("%s? no\n\n", question);
+		return (0);
+	}
+	if (yflag || (persevere && nflag)) {
+		printf("%s? yes\n\n", question);
+		return (1);
+	}
+	do	{
+		printf("%s? [yn] ", question);
+		(void) fflush(stdout);
+		c = getc(stdin);
+		while (c != '\n' && getc(stdin) != '\n')
+			if (feof(stdin))
+				return (0);
+	} while (c != 'y' && c != 'Y' && c != 'n' && c != 'N');
+	printf("\n");
+	if (c == 'y' || c == 'Y')
+		return (1);
+	return (0);
+}
+
+/*
+ * Malloc buffers and set up cache.
+ */
+void
+bufinit()
+{
+	register struct bufarea *bp;
+	long bufcnt, i;
+	char *bufp;
+
+	pbp = pdirbp = (struct bufarea *)0;
+	bufp = malloc((unsigned int)sblock.fs_bsize);
+	if (bufp == 0)
+		errexit("cannot allocate buffer pool\n");
+	cgblk.b_un.b_buf = bufp;
+	initbarea(&cgblk);
+	bufhead.b_next = bufhead.b_prev = &bufhead;
+	bufcnt = MAXBUFSPACE / sblock.fs_bsize;
+	if (bufcnt < MINBUFS)
+		bufcnt = MINBUFS;
+	for (i = 0; i < bufcnt; i++) {
+		bp = (struct bufarea *)malloc(sizeof(struct bufarea));
+		bufp = malloc((unsigned int)sblock.fs_bsize);
+		if (bp == NULL || bufp == NULL) {
+			if (i >= MINBUFS)
+				break;
+			errexit("cannot allocate buffer pool\n");
+		}
+		bp->b_un.b_buf = bufp;
+		bp->b_prev = &bufhead;
+		bp->b_next = bufhead.b_next;
+		bufhead.b_next->b_prev = bp;
+		bufhead.b_next = bp;
+		initbarea(bp);
+	}
+	bufhead.b_size = i;	/* save number of buffers */
+}
+
+/*
+ * Manage a cache of directory blocks.
+ */
+struct bufarea *
+getdatablk(blkno, size)
+	daddr_t blkno;
+	long size;
+{
+	register struct bufarea *bp;
+
+	for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next)
+		if (bp->b_bno == fsbtodb(&sblock, blkno))
+			goto foundit;
+	for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev)
+		if ((bp->b_flags & B_INUSE) == 0)
+			break;
+	if (bp == &bufhead)
+		errexit("deadlocked buffer pool\n");
+	getblk(bp, blkno, size);
+	/* fall through */
+foundit:
+	totalreads++;
+	bp->b_prev->b_next = bp->b_next;
+	bp->b_next->b_prev = bp->b_prev;
+	bp->b_prev = &bufhead;
+	bp->b_next = bufhead.b_next;
+	bufhead.b_next->b_prev = bp;
+	bufhead.b_next = bp;
+	bp->b_flags |= B_INUSE;
+	return (bp);
+}
+
+void
+getblk(bp, blk, size)
+	register struct bufarea *bp;
+	daddr_t blk;
+	long size;
+{
+	daddr_t dblk;
+
+	dblk = fsbtodb(&sblock, blk);
+	if (bp->b_bno != dblk) {
+		flush(fswritefd, bp);
+		diskreads++;
+		bp->b_errs = bread(fsreadfd, bp->b_un.b_buf, dblk, size);
+		bp->b_bno = dblk;
+		bp->b_size = size;
+	}
+}
+
+void
+flush(fd, bp)
+	int fd;
+	register struct bufarea *bp;
+{
+	register int i, j;
+
+	if (!bp->b_dirty)
+		return;
+	if (bp->b_errs != 0)
+		pfatal("WRITING %sZERO'ED BLOCK %d TO DISK\n",
+		    (bp->b_errs == bp->b_size / dev_bsize) ? "" : "PARTIALLY ",
+		    bp->b_bno);
+	bp->b_dirty = 0;
+	bp->b_errs = 0;
+	bwrite(fd, bp->b_un.b_buf, bp->b_bno, (long)bp->b_size);
+	if (bp != &sblk)
+		return;
+	for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
+		bwrite(fswritefd, (char *)sblock.fs_csp[j],
+		    fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
+		    sblock.fs_cssize - i < sblock.fs_bsize ?
+		    sblock.fs_cssize - i : sblock.fs_bsize);
+	}
+}
+
+void
+rwerror(mesg, blk)
+	char *mesg;
+	daddr_t blk;
+{
+
+	if (preen == 0)
+		printf("\n");
+	pfatal("CANNOT %s: BLK %ld", mesg, blk);
+	if (reply("CONTINUE") == 0)
+		errexit("Program terminated\n");
+}
+
+void
+ckfini(markclean)
+	int markclean;
+{
+	register struct bufarea *bp, *nbp;
+	int cnt = 0;
+
+	if (fswritefd < 0) {
+		(void)close(fsreadfd);
+		return;
+	}
+	flush(fswritefd, &sblk);
+	if (havesb && sblk.b_bno != SBOFF / dev_bsize &&
+	    !preen && reply("UPDATE STANDARD SUPERBLOCK")) {
+		sblk.b_bno = SBOFF / dev_bsize;
+		sbdirty();
+		flush(fswritefd, &sblk);
+	}
+	flush(fswritefd, &cgblk);
+	free(cgblk.b_un.b_buf);
+	for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) {
+		cnt++;
+		flush(fswritefd, bp);
+		nbp = bp->b_prev;
+		free(bp->b_un.b_buf);
+		free((char *)bp);
+	}
+	if (bufhead.b_size != cnt)
+		errexit("Panic: lost %d buffers\n", bufhead.b_size - cnt);
+	pbp = pdirbp = (struct bufarea *)0;
+	if (markclean && (sblock.fs_clean & FS_ISCLEAN) == 0) {
+		/*
+		 * Mark the file system as clean, and sync the superblock.
+		 */
+		if (preen)
+			pwarn("MARKING FILE SYSTEM CLEAN\n");
+		else if (!reply("MARK FILE SYSTEM CLEAN"))
+			markclean = 0;
+		if (markclean) {
+			sblock.fs_clean = FS_ISCLEAN;
+			sbdirty();
+			flush(fswritefd, &sblk);
+		}
+	}
+	if (debug)
+		printf("cache missed %ld of %ld (%d%%)\n", diskreads,
+		    totalreads, (int)(diskreads * 100 / totalreads));
+	(void)close(fsreadfd);
+	(void)close(fswritefd);
+}
+
+int
+bread(fd, buf, blk, size)
+	int fd;
+	char *buf;
+	daddr_t blk;
+	long size;
+{
+	char *cp;
+	int i, errs;
+	off_t offset;
+
+	offset = blk;
+	offset *= dev_bsize;
+	if (lseek(fd, offset, 0) < 0)
+		rwerror("SEEK", blk);
+	else if (read(fd, buf, (int)size) == size)
+		return (0);
+	rwerror("READ", blk);
+	if (lseek(fd, offset, 0) < 0)
+		rwerror("SEEK", blk);
+	errs = 0;
+	memset(buf, 0, (size_t)size);
+	printf("THE FOLLOWING DISK SECTORS COULD NOT BE READ:");
+	for (cp = buf, i = 0; i < size; i += secsize, cp += secsize) {
+		if (read(fd, cp, (int)secsize) != secsize) {
+			(void)lseek(fd, offset + i + secsize, 0);
+			if (secsize != dev_bsize && dev_bsize != 1)
+				printf(" %ld (%ld),",
+				    (blk * dev_bsize + i) / secsize,
+				    blk + i / dev_bsize);
+			else
+				printf(" %ld,", blk + i / dev_bsize);
+			errs++;
+		}
+	}
+	printf("\n");
+	return (errs);
+}
+
+void
+bwrite(fd, buf, blk, size)
+	int fd;
+	char *buf;
+	daddr_t blk;
+	long size;
+{
+	int i;
+	char *cp;
+	off_t offset;
+
+	if (fd < 0)
+		return;
+	offset = blk;
+	offset *= dev_bsize;
+	if (lseek(fd, offset, 0) < 0)
+		rwerror("SEEK", blk);
+	else if (write(fd, buf, (int)size) == size) {
+		fsmodified = 1;
+		return;
+	}
+	rwerror("WRITE", blk);
+	if (lseek(fd, offset, 0) < 0)
+		rwerror("SEEK", blk);
+	printf("THE FOLLOWING SECTORS COULD NOT BE WRITTEN:");
+	for (cp = buf, i = 0; i < size; i += dev_bsize, cp += dev_bsize)
+		if (write(fd, cp, (int)dev_bsize) != dev_bsize) {
+			(void)lseek(fd, offset + i + dev_bsize, 0);
+			printf(" %ld,", blk + i / dev_bsize);
+		}
+	printf("\n");
+	return;
+}
+
+/*
+ * allocate a data block with the specified number of fragments
+ */
+int
+allocblk(frags)
+	long frags;
+{
+	register int i, j, k;
+
+	if (frags <= 0 || frags > sblock.fs_frag)
+		return (0);
+	for (i = 0; i < maxfsblock - sblock.fs_frag; i += sblock.fs_frag) {
+		for (j = 0; j <= sblock.fs_frag - frags; j++) {
+			if (testbmap(i + j))
+				continue;
+			for (k = 1; k < frags; k++)
+				if (testbmap(i + j + k))
+					break;
+			if (k < frags) {
+				j += k;
+				continue;
+			}
+			for (k = 0; k < frags; k++)
+				setbmap(i + j + k);
+			n_blks += frags;
+			return (i + j);
+		}
+	}
+	return (0);
+}
+
+/*
+ * Free a previously allocated block
+ */
+void
+freeblk(blkno, frags)
+	daddr_t blkno;
+	long frags;
+{
+	struct inodesc idesc;
+
+	idesc.id_blkno = blkno;
+	idesc.id_numfrags = frags;
+	(void)pass4check(&idesc);
+}
+
+/*
+ * Find a pathname
+ */
+void
+getpathname(namebuf, curdir, ino)
+	char *namebuf;
+	ino_t curdir, ino;
+{
+	int len;
+	register char *cp;
+	struct inodesc idesc;
+	static int busy = 0;
+
+	if (curdir == ino && ino == ROOTINO) {
+		(void)strcpy(namebuf, "/");
+		return;
+	}
+	if (busy ||
+	    (statemap[curdir] != DSTATE && statemap[curdir] != DFOUND)) {
+		(void)strcpy(namebuf, "?");
+		return;
+	}
+	busy = 1;
+	memset(&idesc, 0, sizeof(struct inodesc));
+	idesc.id_type = DATA;
+	idesc.id_fix = IGNORE;
+	cp = &namebuf[MAXPATHLEN - 1];
+	*cp = '\0';
+	if (curdir != ino) {
+		idesc.id_parent = curdir;
+		goto namelookup;
+	}
+	while (ino != ROOTINO) {
+		idesc.id_number = ino;
+		idesc.id_func = findino;
+		idesc.id_name = "..";
+		if ((ckinode(ginode(ino), &idesc) & FOUND) == 0)
+			break;
+	namelookup:
+		idesc.id_number = idesc.id_parent;
+		idesc.id_parent = ino;
+		idesc.id_func = findname;
+		idesc.id_name = namebuf;
+		if ((ckinode(ginode(idesc.id_number), &idesc)&FOUND) == 0)
+			break;
+		len = strlen(namebuf);
+		cp -= len;
+		memcpy(cp, namebuf, (size_t)len);
+		*--cp = '/';
+		if (cp < &namebuf[MAXNAMLEN])
+			break;
+		ino = idesc.id_number;
+	}
+	busy = 0;
+	if (ino != ROOTINO)
+		*--cp = '?';
+	memcpy(namebuf, cp, (size_t)(&namebuf[MAXPATHLEN] - cp));
+}
+
+void
+catch()
+{
+	if (!doinglevel2)
+		ckfini(0);
+	exit(12);
+}
+
+/*
+ * When preening, allow a single quit to signal
+ * a special exit after filesystem checks complete
+ * so that reboot sequence may be interrupted.
+ */
+void
+catchquit()
+{
+	extern returntosingle;
+
+	printf("returning to single-user after filesystem check\n");
+	returntosingle = 1;
+	(void)signal(SIGQUIT, SIG_DFL);
+}
+
+/*
+ * Ignore a single quit signal; wait and flush just in case.
+ * Used by child processes in preen.
+ */
+void
+voidquit()
+{
+
+	sleep(1);
+	(void)signal(SIGQUIT, SIG_IGN);
+	(void)signal(SIGQUIT, SIG_DFL);
+}
+
+/*
+ * determine whether an inode should be fixed.
+ */
+int
+dofix(idesc, msg)
+	register struct inodesc *idesc;
+	char *msg;
+{
+
+	switch (idesc->id_fix) {
+
+	case DONTKNOW:
+		if (idesc->id_type == DATA)
+			direrror(idesc->id_number, msg);
+		else
+			pwarn(msg);
+		if (preen) {
+			printf(" (SALVAGED)\n");
+			idesc->id_fix = FIX;
+			return (ALTERED);
+		}
+		if (reply("SALVAGE") == 0) {
+			idesc->id_fix = NOFIX;
+			return (0);
+		}
+		idesc->id_fix = FIX;
+		return (ALTERED);
+
+	case FIX:
+		return (ALTERED);
+
+	case NOFIX:
+	case IGNORE:
+		return (0);
+
+	default:
+		errexit("UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix);
+	}
+	/* NOTREACHED */
+}
+
+/* VARARGS1 */
+errexit(s1, s2, s3, s4)
+	char *s1;
+	long s2, s3, s4;
+{
+	printf(s1, s2, s3, s4);
+	exit(8);
+}
+
+/*
+ * An unexpected inconsistency occured.
+ * Die if preening, otherwise just print message and continue.
+ */
+/* VARARGS1 */
+pfatal(s, a1, a2, a3)
+	char *s;
+	long a1, a2, a3;
+{
+
+	if (preen) {
+		printf("%s: ", cdevname);
+		printf(s, a1, a2, a3);
+		printf("\n");
+		printf("%s: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.\n",
+			cdevname);
+		exit(8);
+	}
+	printf(s, a1, a2, a3);
+}
+
+/*
+ * Pwarn just prints a message when not preening,
+ * or a warning (preceded by filename) when preening.
+ */
+/* VARARGS1 */
+pwarn(s, a1, a2, a3, a4, a5, a6)
+	char *s;
+	long a1, a2, a3, a4, a5, a6;
+{
+
+	if (preen)
+		printf("%s: ", cdevname);
+	printf(s, a1, a2, a3, a4, a5, a6);
+}
+
+#ifndef lint
+/*
+ * Stub for routines from kernel.
+ */
+panic(s)
+	char *s;
+{
+
+	pfatal("INTERNAL INCONSISTENCY:");
+	errexit(s);
+}
+#endif