From 31f4ab50bcdde789661a41a6312c4134a04fcc43 Mon Sep 17 00:00:00 2001
From: Bruce Evans <bde@FreeBSD.org>
Date: Sun, 2 Apr 1995 14:52:29 +0000
Subject: [PATCH] Submitted by:	phk, added to by bde

Fix all the warnings from `gcc -Wall'.
---
 sbin/fsck/dir.c           | 30 +++++++++++--
 sbin/fsck/fsck.h          | 90 ++++++++++++++++++++++++++++++++++++---
 sbin/fsck/inode.c         | 22 ++++++++--
 sbin/fsck/main.c          | 22 ++++++----
 sbin/fsck/pass1.c         | 12 ++++--
 sbin/fsck/pass1b.c        |  4 +-
 sbin/fsck/pass2.c         |  6 ++-
 sbin/fsck/pass3.c         |  3 +-
 sbin/fsck/pass4.c         |  4 +-
 sbin/fsck/pass5.c         |  6 ++-
 sbin/fsck/preen.c         | 39 +++++++++++------
 sbin/fsck/setup.c         | 18 ++++++--
 sbin/fsck/utilities.c     | 72 ++++++++++++++++++++++---------
 sbin/fsck_ffs/dir.c       | 30 +++++++++++--
 sbin/fsck_ffs/fsck.h      | 90 ++++++++++++++++++++++++++++++++++++---
 sbin/fsck_ffs/inode.c     | 22 ++++++++--
 sbin/fsck_ffs/main.c      | 22 ++++++----
 sbin/fsck_ffs/pass1.c     | 12 ++++--
 sbin/fsck_ffs/pass1b.c    |  4 +-
 sbin/fsck_ffs/pass2.c     |  6 ++-
 sbin/fsck_ffs/pass3.c     |  3 +-
 sbin/fsck_ffs/pass4.c     |  4 +-
 sbin/fsck_ffs/pass5.c     |  6 ++-
 sbin/fsck_ffs/preen.c     | 39 +++++++++++------
 sbin/fsck_ffs/setup.c     | 18 ++++++--
 sbin/fsck_ffs/utilities.c | 72 ++++++++++++++++++++++---------
 sbin/fsck_ifs/dir.c       | 30 +++++++++++--
 sbin/fsck_ifs/fsck.h      | 90 ++++++++++++++++++++++++++++++++++++---
 sbin/fsck_ifs/inode.c     | 22 ++++++++--
 sbin/fsck_ifs/main.c      | 22 ++++++----
 sbin/fsck_ifs/pass1.c     | 12 ++++--
 sbin/fsck_ifs/pass1b.c    |  4 +-
 sbin/fsck_ifs/pass2.c     |  6 ++-
 sbin/fsck_ifs/pass3.c     |  3 +-
 sbin/fsck_ifs/pass4.c     |  4 +-
 sbin/fsck_ifs/pass5.c     |  6 ++-
 sbin/fsck_ifs/preen.c     | 39 +++++++++++------
 sbin/fsck_ifs/setup.c     | 18 ++++++--
 sbin/fsck_ifs/utilities.c | 72 ++++++++++++++++++++++---------
 sbin/quotacheck/preen.c   | 39 +++++++++++------
 40 files changed, 797 insertions(+), 226 deletions(-)

diff --git a/sbin/fsck/dir.c b/sbin/fsck/dir.c
index 77769cc729fa..b05109c804b2 100644
--- a/sbin/fsck/dir.c
+++ b/sbin/fsck/dir.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)dir.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)dir.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -40,6 +40,7 @@ static char sccsid[] = "@(#)dir.c	8.1 (Berkeley) 6/5/93";
 #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 "fsck.h"
@@ -56,12 +57,20 @@ struct	odirtemplate odirhead = {
 	0, DIRBLKSIZ - 12, 2, ".."
 };
 
-struct direct	*fsck_readdir();
-struct bufarea	*getdirblk();
+
+static int	chgino __P((struct inodesc *idesc));
+static int	dircheck __P((struct inodesc *idesc, struct direct *dp));
+static int	expanddir __P((struct dinode *dp, char *name));
+static void	freedir __P((ino_t ino, ino_t parent));
+static struct direct * fsck_readdir __P((struct inodesc *idesc));
+static struct bufarea * getdirblk __P((daddr_t blkno, long size));
+static int	lftempname __P((char *bufp, ino_t ino));
+static int	mkentry __P((struct inodesc *idesc));
 
 /*
  * Propagate connected state through the tree.
  */
+void
 propagate()
 {
 	register struct inoinfo **inpp, *inp;
@@ -87,6 +96,7 @@ propagate()
 /*
  * Scan each entry in a directory block.
  */
+int
 dirscan(idesc)
 	register struct inodesc *idesc;
 {
@@ -206,6 +216,7 @@ fsck_readdir(idesc)
  * Verify that a directory entry is valid.
  * This is a superset of the checks made in the kernel.
  */
+int
 dircheck(idesc, dp)
 	struct inodesc *idesc;
 	register struct direct *dp;
@@ -248,6 +259,7 @@ dircheck(idesc, dp)
 	return (0);
 }
 
+void
 direrror(ino, errmesg)
 	ino_t ino;
 	char *errmesg;
@@ -256,6 +268,7 @@ direrror(ino, errmesg)
 	fileerror(ino, ino, errmesg);
 }
 
+void
 fileerror(cwd, ino, errmesg)
 	ino_t cwd, ino;
 	char *errmesg;
@@ -279,6 +292,7 @@ fileerror(cwd, ino, errmesg)
 		pfatal("NAME=%s\n", pathbuf);
 }
 
+void
 adjust(idesc, lcnt)
 	register struct inodesc *idesc;
 	short lcnt;
@@ -309,6 +323,7 @@ adjust(idesc, lcnt)
 	}
 }
 
+int
 mkentry(idesc)
 	struct inodesc *idesc;
 {
@@ -345,6 +360,7 @@ mkentry(idesc)
 	return (ALTERED|STOP);
 }
 
+int
 chgino(idesc)
 	struct inodesc *idesc;
 {
@@ -360,6 +376,7 @@ chgino(idesc)
 	return (ALTERED|STOP);
 }
 
+int
 linkup(orphan, parentdir)
 	ino_t orphan;
 	ino_t parentdir;
@@ -369,7 +386,6 @@ linkup(orphan, parentdir)
 	ino_t oldlfdir;
 	struct inodesc idesc;
 	char tempname[BUFSIZ];
-	extern int pass4check();
 
 	bzero((char *)&idesc, sizeof(struct inodesc));
 	dp = ginode(orphan);
@@ -467,6 +483,7 @@ linkup(orphan, parentdir)
 /*
  * fix an entry in a directory.
  */
+int
 changeino(dir, name, newnum)
 	ino_t dir;
 	char *name;
@@ -487,6 +504,7 @@ changeino(dir, name, newnum)
 /*
  * make an entry in a directory
  */
+int
 makeentry(parent, ino, name)
 	ino_t parent, ino;
 	char *name;
@@ -522,6 +540,7 @@ makeentry(parent, ino, name)
 /*
  * Attempt to expand the size of a directory
  */
+int
 expanddir(dp, name)
 	register struct dinode *dp;
 	char *name;
@@ -578,6 +597,7 @@ expanddir(dp, name)
 /*
  * allocate a new directory
  */
+int
 allocdir(parent, request, mode)
 	ino_t parent, request;
 	int mode;
@@ -633,6 +653,7 @@ allocdir(parent, request, mode)
 /*
  * free a directory inode
  */
+static void
 freedir(ino, parent)
 	ino_t ino, parent;
 {
@@ -649,6 +670,7 @@ freedir(ino, parent)
 /*
  * generate a temporary name for the lost+found directory.
  */
+int
 lftempname(bufp, ino)
 	char *bufp;
 	ino_t ino;
diff --git a/sbin/fsck/fsck.h b/sbin/fsck/fsck.h
index 0a49e4c55c24..bfa554abb3fb 100644
--- a/sbin/fsck/fsck.h
+++ b/sbin/fsck/fsck.h
@@ -179,13 +179,14 @@ char	havesb;			/* superblock has been read */
 int	fsmodified;		/* 1 => write done to file system */
 int	fsreadfd;		/* file descriptor for reading file system */
 int	fswritefd;		/* file descriptor for writing file system */
+int	returntosingle;		/* return to single user mode */
 
 daddr_t	maxfsblock;		/* number of blocks in the file system */
 char	*blockmap;		/* ptr to primary blk allocation map */
 ino_t	maxino;			/* number of inodes in file system */
 ino_t	lastino;		/* last inode in use */
 char	*statemap;		/* ptr to inode state table */
-char	*typemap;		/* ptr to inode type table */
+unsigned char	*typemap;	/* ptr to inode type table */
 short	*lncntp;		/* ptr to link count table */
 
 ino_t	lfdir;			/* lost & found directory inode number */
@@ -208,9 +209,84 @@ struct	dinode zino;
 #define	ALTERED	0x08
 #define	FOUND	0x10
 
-time_t time();
-struct dinode *ginode();
-struct inoinfo *getinoinfo();
-void getblk();
-ino_t allocino();
-int findino();
+/* dir.c */
+void	adjust __P((struct inodesc *idesc, short lcnt));
+int	allocdir __P((ino_t parent, ino_t request, int mode));
+int	changeino __P((ino_t dir, char *name, ino_t newnum));
+void	direrror __P((ino_t ino, char *errmesg));
+int	dirscan __P((struct inodesc *idesc));
+void	fileerror __P((ino_t cwd, ino_t ino, char *errmesg));
+int	linkup __P((ino_t orphan, ino_t parentdir));
+int	makeentry __P((ino_t parent, ino_t ino, char *name));
+void	propagate __P((void));
+
+/* ffs_subr.c */
+void	ffs_fragacct __P((struct fs *fs, int fragmap, long *fraglist, int cnt));
+
+/* inode.c */
+ino_t	allocino __P((ino_t request, int type));
+void	blkerror __P((ino_t ino, char *type, daddr_t blk));
+void	cacheino __P((struct dinode *dp, ino_t inumber));
+int	chkrange __P((daddr_t blk, int cnt));
+int	ckinode __P((struct dinode *dp, struct inodesc *idesc));
+void	clri __P((struct inodesc *idesc, char *type, int flag));
+int	findino __P((struct inodesc *idesc));
+void	freeino __P((ino_t ino));
+void	freeinodebuf __P((void));
+struct dinode * ginode __P((ino_t inumber));
+struct inoinfo * getinoinfo __P((ino_t inumber));
+struct dinode * getnextinode __P((ino_t inumber));
+void	inodirty __P((void));
+void	inocleanup __P((void));
+void	pinode __P((ino_t ino));
+void	resetinodebuf __P((void));
+int	findname __P((struct inodesc *idesc));
+
+/* pass1.c */
+void	pass1 __P((void));
+int	pass1check __P((struct inodesc *idesc));
+
+/* pass1b.c */
+void	pass1b __P((void));
+
+/* pass2.c */
+void	pass2 __P((void));
+
+/* pass3.c */
+void	pass3 __P((void));
+
+/* pass4.c */
+void	pass4 __P((void));
+int	pass4check __P((struct inodesc *idesc));
+
+/* pass5.c */
+void	pass5 __P((void));
+
+/* preen.c */
+char	*blockcheck __P((char *name));
+int	checkfstab __P((int preen, int maxrun,int (*docheck)(), int (*chkit)()));
+
+/* setup.c */
+int	setup __P((char *dev));
+
+/* utilities.c */
+int	allocblk __P((long frags));
+int	bread __P((int fd, char *buf, daddr_t blk, long size));
+void	bufinit __P((void));
+void	bwrite __P((int fd, char *buf, daddr_t blk, long size));
+void	catch __P((int));
+void	catchquit __P((int));
+void	ckfini __P((void));
+int	dofix __P((struct inodesc *idesc, char *msg));
+__dead void errexit __P((const char *s1, ...)) __dead2;
+void	flush __P((int fd, struct bufarea *bp));
+void	freeblk __P((daddr_t blkno, long frags));
+int	ftypeok __P((struct dinode *dp));
+void	getblk __P((struct bufarea *bp, daddr_t blk, long size));
+struct bufarea * getdatablk __P((daddr_t blkno, long size));
+void	getpathname __P((char *namebuf, ino_t curdir, ino_t ino));
+__dead void panic __P((const char *, ...)) __dead2;
+void	pfatal __P((const char *s1, ...));
+void	pwarn __P((const char *s1, ...));
+int	reply __P((char *question));
+void	voidquit __P((int));
diff --git a/sbin/fsck/inode.c b/sbin/fsck/inode.c
index 56b978fa30dd..dcf2d89b28a4 100644
--- a/sbin/fsck/inode.c
+++ b/sbin/fsck/inode.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)inode.c	8.5 (Berkeley) 2/8/95";
+static const char sccsid[] = "@(#)inode.c	8.5 (Berkeley) 2/8/95";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -41,12 +41,16 @@ static char sccsid[] = "@(#)inode.c	8.5 (Berkeley) 2/8/95";
 #include <ufs/ufs/dir.h>
 #include <ufs/ffs/fs.h>
 #include <pwd.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include "fsck.h"
 
 static ino_t startinum;
 
+static int	iblock __P((struct inodesc *idesc, long ilevel, quad_t isize));
+
+int
 ckinode(dp, idesc)
 	struct dinode *dp;
 	register struct inodesc *idesc;
@@ -99,6 +103,7 @@ ckinode(dp, idesc)
 	return (KEEPON);
 }
 
+static int
 iblock(idesc, ilevel, isize)
 	struct inodesc *idesc;
 	long ilevel;
@@ -110,7 +115,6 @@ iblock(idesc, ilevel, isize)
 	int i, n, (*func)(), nif;
 	quad_t sizepb;
 	char buf[BUFSIZ];
-	extern int dirscan(), pass1check();
 
 	if (idesc->id_type == ADDR) {
 		func = idesc->id_func;
@@ -164,6 +168,7 @@ iblock(idesc, ilevel, isize)
  * Check that a block in a legal block number.
  * Return 0 if in range, 1 if out of range.
  */
+int
 chkrange(blk, cnt)
 	daddr_t blk;
 	int cnt;
@@ -253,6 +258,7 @@ getnextinode(inumber)
 	return (dp++);
 }
 
+void
 resetinodebuf()
 {
 
@@ -278,6 +284,7 @@ resetinodebuf()
 		(void)getnextinode(nextino);
 }
 
+void
 freeinodebuf()
 {
 
@@ -293,6 +300,7 @@ freeinodebuf()
  *
  * Enter inodes into the cache.
  */
+void
 cacheino(dp, inumber)
 	register struct dinode *dp;
 	ino_t inumber;
@@ -352,6 +360,7 @@ getinoinfo(inumber)
 /*
  * Clean up all the inode cache structure.
  */
+void
 inocleanup()
 {
 	register struct inoinfo **inpp;
@@ -365,12 +374,13 @@ inocleanup()
 	inphead = inpsort = NULL;
 }
 	
+void
 inodirty()
 {
-	
 	dirty(pbp);
 }
 
+void
 clri(idesc, type, flag)
 	register struct inodesc *idesc;
 	char *type;
@@ -395,6 +405,7 @@ clri(idesc, type, flag)
 	}
 }
 
+int
 findname(idesc)
 	struct inodesc *idesc;
 {
@@ -406,6 +417,7 @@ findname(idesc)
 	return (STOP|FOUND);
 }
 
+int
 findino(idesc)
 	struct inodesc *idesc;
 {
@@ -421,6 +433,7 @@ findino(idesc)
 	return (KEEPON);
 }
 
+void
 pinode(ino)
 	ino_t ino;
 {
@@ -446,6 +459,7 @@ pinode(ino)
 	printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]);
 }
 
+void
 blkerror(ino, type, blk)
 	ino_t ino;
 	char *type;
@@ -526,11 +540,11 @@ allocino(request, type)
 /*
  * deallocate an inode
  */
+void
 freeino(ino)
 	ino_t ino;
 {
 	struct inodesc idesc;
-	extern int pass4check();
 	struct dinode *dp;
 
 	bzero((char *)&idesc, sizeof(struct inodesc));
diff --git a/sbin/fsck/main.c b/sbin/fsck/main.c
index 5ff6918a131e..1a6cd44f55d1 100644
--- a/sbin/fsck/main.c
+++ b/sbin/fsck/main.c
@@ -32,13 +32,13 @@
  */
 
 #ifndef lint
-static char copyright[] =
+static const 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	8.2 (Berkeley) 1/23/94";
+static const char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -49,22 +49,24 @@ static char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
 #include <ufs/ffs/fs.h>
 #include <fstab.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <string.h>
 #include <ctype.h>
 #include <stdio.h>
 #include "fsck.h"
+static int	argtoi __P((int flag, char *req, char *str, int base));
+static int	docheck __P((struct fstab *fsp));
+static int	checkfilesys __P((char *filesys, char *mntpt, long auxdata,
+				  int child));
 
-void	catch(), catchquit(), voidquit();
-int	returntosingle;
-
+int
 main(argc, argv)
 	int	argc;
 	char	*argv[];
 {
 	int ch;
 	int ret, maxrun = 0;
-	extern int docheck(), checkfilesys();
-	extern char *optarg, *blockcheck();
+	extern char *optarg;
 	extern int optind;
 
 	sync();
@@ -135,6 +137,7 @@ main(argc, argv)
 	exit(ret);
 }
 
+int
 argtoi(flag, req, str, base)
 	int flag;
 	char *req, *str;
@@ -152,6 +155,7 @@ argtoi(flag, req, str, base)
 /*
  * Determine whether a filesystem should be checked.
  */
+int
 docheck(fsp)
 	register struct fstab *fsp;
 {
@@ -168,9 +172,11 @@ docheck(fsp)
  * Check the specified filesystem.
  */
 /* ARGSUSED */
+int
 checkfilesys(filesys, mntpt, auxdata, child)
 	char *filesys, *mntpt;
 	long auxdata;
+	int child;
 {
 	daddr_t n_ffree, n_bfree;
 	struct dups *dp;
@@ -255,7 +261,7 @@ checkfilesys(filesys, mntpt, auxdata, child)
 	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",
+	printf("(%ld frags, %ld blocks, %ld.%ld%% 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 &&
diff --git a/sbin/fsck/pass1.c b/sbin/fsck/pass1.c
index 7d8e507e1ce4..70ce40afce16 100644
--- a/sbin/fsck/pass1.c
+++ b/sbin/fsck/pass1.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass1.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass1.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -40,15 +40,17 @@ static char sccsid[] = "@(#)pass1.c	8.1 (Berkeley) 6/5/93";
 #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 "fsck.h"
 
 static daddr_t badblk;
 static daddr_t dupblk;
-int pass1check();
-struct dinode *getnextinode();
 
+static void	checkinode __P((ino_t inumber, struct inodesc *idesc));
+
+void
 pass1()
 {
 	ino_t inumber;
@@ -87,6 +89,7 @@ pass1()
 	freeinodebuf();
 }
 
+void
 checkinode(inumber, idesc)
 	ino_t inumber;
 	register struct inodesc *idesc;
@@ -148,7 +151,7 @@ checkinode(inumber, idesc)
 				errexit("cannot read symlink");
 			if (debug) {
 				symbuf[dp->di_size] = 0;
-				printf("convert symlink %d(%s) of size %d\n",
+				printf("convert symlink %ld(%s) of size %ld\n",
 					inumber, symbuf, (long)dp->di_size);
 			}
 			dp = ginode(inumber);
@@ -247,6 +250,7 @@ checkinode(inumber, idesc)
 	}
 }
 
+int
 pass1check(idesc)
 	register struct inodesc *idesc;
 {
diff --git a/sbin/fsck/pass1b.c b/sbin/fsck/pass1b.c
index 27b2dfd6238c..1450bd80e0a3 100644
--- a/sbin/fsck/pass1b.c
+++ b/sbin/fsck/pass1b.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass1b.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass1b.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -45,6 +45,7 @@ static char sccsid[] = "@(#)pass1b.c	8.1 (Berkeley) 6/5/93";
 int	pass1bcheck();
 static  struct dups *duphead;
 
+void
 pass1b()
 {
 	register int c, i;
@@ -72,6 +73,7 @@ pass1b()
 	}
 }
 
+int
 pass1bcheck(idesc)
 	register struct inodesc *idesc;
 {
diff --git a/sbin/fsck/pass2.c b/sbin/fsck/pass2.c
index 631475174372..82cbe0afd0f1 100644
--- a/sbin/fsck/pass2.c
+++ b/sbin/fsck/pass2.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
+static const char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -40,6 +40,7 @@ static char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
 #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 "fsck.h"
@@ -48,6 +49,7 @@ static char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
 
 int	pass2check(), blksort();
 
+void
 pass2()
 {
 	register struct dinode *dp;
@@ -189,6 +191,7 @@ pass2()
 	propagate();
 }
 
+int
 pass2check(idesc)
 	struct inodesc *idesc;
 {
@@ -422,6 +425,7 @@ pass2check(idesc)
 /*
  * Routine to sort disk blocks.
  */
+int
 blksort(inpp1, inpp2)
 	struct inoinfo **inpp1, **inpp2;
 {
diff --git a/sbin/fsck/pass3.c b/sbin/fsck/pass3.c
index 5c6f09d041de..963c41a28c5c 100644
--- a/sbin/fsck/pass3.c
+++ b/sbin/fsck/pass3.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass3.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass3.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -41,6 +41,7 @@ static char sccsid[] = "@(#)pass3.c	8.1 (Berkeley) 6/5/93";
 #include <ufs/ffs/fs.h>
 #include "fsck.h"
 
+void
 pass3()
 {
 	register struct inoinfo **inpp, *inp;
diff --git a/sbin/fsck/pass4.c b/sbin/fsck/pass4.c
index 7450530e8a4e..df8f72247186 100644
--- a/sbin/fsck/pass4.c
+++ b/sbin/fsck/pass4.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -45,6 +45,7 @@ static char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
 
 int	pass4check();
 
+void
 pass4()
 {
 	register ino_t inumber;
@@ -103,6 +104,7 @@ pass4()
 	}
 }
 
+int
 pass4check(idesc)
 	register struct inodesc *idesc;
 {
diff --git a/sbin/fsck/pass5.c b/sbin/fsck/pass5.c
index 7e8b2ef061b2..7972468bd251 100644
--- a/sbin/fsck/pass5.c
+++ b/sbin/fsck/pass5.c
@@ -32,19 +32,21 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass5.c	8.2 (Berkeley) 2/2/94";
+static const char sccsid[] = "@(#)pass5.c	8.2 (Berkeley) 2/2/94";
 #endif /* not lint */
 
 #include <sys/param.h>
 #include <sys/time.h>
 #include <ufs/ufs/dinode.h>
 #include <ufs/ffs/fs.h>
+#include <stdio.h>
 #include <string.h>
 #include "fsck.h"
 
+void
 pass5()
 {
-	int c, blk, frags, basesize, sumsize, mapsize, savednrpos;
+	int c, blk, frags, basesize, sumsize, mapsize, savednrpos = 0;
 	register struct fs *fs = &sblock;
 	register struct cg *cg = &cgrp;
 	daddr_t dbase, dmax;
diff --git a/sbin/fsck/preen.c b/sbin/fsck/preen.c
index 005a65d97989..1cdb01d6e977 100644
--- a/sbin/fsck/preen.c
+++ b/sbin/fsck/preen.c
@@ -32,19 +32,20 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)preen.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)preen.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
+#include <ufs/ufs/dinode.h>
 #include <fstab.h>
 #include <string.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <stdlib.h>
 #include <ctype.h>
-
-char	*rawname(), *unrawname(), *blockcheck();
+#include "fsck.h"
 
 struct part {
 	struct	part *next;		/* forward link of partitions on disk */
@@ -60,9 +61,16 @@ struct disk {
 	int	pid;			/* If != 0, pid of proc working on */
 } *disks;
 
+static void	addpart __P((char *name, char *fsname, long auxdata));
+static int	startdisk __P((struct disk *dk, int (*checkit)()));
+static struct disk 	*finddisk __P((char *name));
+static char 	*unrawname __P((char *name));
+static char 	*rawname __P((char *name));
+
 int	nrun, ndisks;
 char	hotroot;
 
+int
 checkfstab(preen, maxrun, docheck, chkit)
 	int preen, maxrun;
 	int (*docheck)(), (*chkit)();
@@ -84,10 +92,12 @@ checkfstab(preen, maxrun, docheck, chkit)
 		while ((fsp = getfsent()) != 0) {
 			if ((auxdata = (*docheck)(fsp)) == 0)
 				continue;
-			if (preen == 0 || passno == 1 && fsp->fs_passno == 1) {
-				if (name = blockcheck(fsp->fs_spec)) {
-					if (sumstatus = (*chkit)(name,
-					    fsp->fs_file, auxdata, 0))
+			if (!preen || (passno == 1 && fsp->fs_passno == 1)) {
+				name = blockcheck(fsp->fs_spec);
+				if (name) {
+					sumstatus = (*chkit)(name,
+					    fsp->fs_file, auxdata, 0);
+					if (sumstatus)
 						return (sumstatus);
 				} else if (preen)
 					return (8);
@@ -111,7 +121,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 			maxrun = ndisks;
 		nextdisk = disks;
 		for (passno = 0; passno < maxrun; ++passno) {
-			while (ret = startdisk(nextdisk, chkit) && nrun > 0)
+			while ((ret = startdisk(nextdisk, chkit)) != 0 && 
+			    nrun > 0)
 				sleep(10);
 			if (ret)
 				return (ret);
@@ -150,8 +161,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 
 			if (nextdisk == NULL) {
 				if (dk->part) {
-					while (ret = startdisk(dk, chkit) &&
-					    nrun > 0)
+					while ((ret = startdisk(dk, chkit)) != 0
+					    && nrun > 0)
 						sleep(10);
 					if (ret)
 						return (ret);
@@ -164,8 +175,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 					    nextdisk->pid == 0)
 						break;
 				}
-				while (ret = startdisk(nextdisk, chkit) &&
-				    nrun > 0)
+				while ((ret = startdisk(nextdisk, chkit)) != 0
+				    && nrun > 0)
 					sleep(10);
 				if (ret)
 					return (ret);
@@ -192,7 +203,7 @@ finddisk(name)
 {
 	register struct disk *dk, **dkp;
 	register char *p;
-	size_t len;
+	size_t len = 0;
 
 	for (p = name + strlen(name) - 1; p >= name; --p)
 		if (isdigit(*p)) {
@@ -225,6 +236,7 @@ finddisk(name)
 	return (dk);
 }
 
+void
 addpart(name, fsname, auxdata)
 	char *name, *fsname;
 	long auxdata;
@@ -256,6 +268,7 @@ addpart(name, fsname, auxdata)
 	pt->auxdata = auxdata;
 }
 
+int
 startdisk(dk, checkit)
 	register struct disk *dk;
 	int (*checkit)();
diff --git a/sbin/fsck/setup.c b/sbin/fsck/setup.c
index fb1c1d9113ff..fe6f2ea95e4d 100644
--- a/sbin/fsck/setup.c
+++ b/sbin/fsck/setup.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
+static const char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
 #endif /* not lint */
 
 #define DKTYPENAMES
@@ -45,6 +45,7 @@ static char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
 #include <sys/disklabel.h>
 #include <sys/file.h>
 #include <errno.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
@@ -54,8 +55,13 @@ struct bufarea asblk;
 #define altsblock (*asblk.b_un.b_fs)
 #define POWEROF2(num)	(((num) & ((num) - 1)) == 0)
 
-struct	disklabel *getdisklabel();
+static int	readsb __P((int listerr));
+static void	badsb __P((int listerr, char *s));
+static int	calcsb __P((char *dev, int devfd, struct fs *fs));
+static struct disklabel * getdisklabel __P((char *s, int fd));
 
+
+int
 setup(dev)
 	char *dev;
 {
@@ -99,7 +105,8 @@ setup(dev)
 	asblk.b_un.b_buf = malloc(SBSIZE);
 	if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
 		errexit("cannot allocate space for superblock\n");
-	if (lp = getdisklabel((char *)NULL, fsreadfd))
+	lp = getdisklabel((char *)NULL, fsreadfd);
+	if (lp)
 		dev_bsize = secsize = lp->d_secsize;
 	else
 		dev_bsize = secsize = DEV_BSIZE;
@@ -297,6 +304,7 @@ setup(dev)
 /*
  * Read in the super block and its summary info.
  */
+static int
 readsb(listerr)
 	int listerr;
 {
@@ -380,6 +388,7 @@ readsb(listerr)
 	return (1);
 }
 
+static void
 badsb(listerr, s)
 	int listerr;
 	char *s;
@@ -398,6 +407,7 @@ badsb(listerr, s)
  * can be used. Do NOT attempt to use other macros without verifying that
  * their needed information is available!
  */
+int
 calcsb(dev, devfd, fs)
 	char *dev;
 	int devfd;
@@ -409,7 +419,7 @@ calcsb(dev, devfd, fs)
 	int i;
 
 	cp = index(dev, '\0') - 1;
-	if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) {
+	if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) {
 		pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
 		return (0);
 	}
diff --git a/sbin/fsck/utilities.c b/sbin/fsck/utilities.c
index 64a4cac19ab3..e8a872dbc21e 100644
--- a/sbin/fsck/utilities.c
+++ b/sbin/fsck/utilities.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -42,12 +42,17 @@ static char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
 #include <ufs/ffs/fs.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <stdarg.h>
 #include <string.h>
 #include <ctype.h>
 #include "fsck.h"
 
 long	diskreads, totalreads;	/* Disk cache statistics */
 
+static void	rwerror __P((char *mesg, daddr_t blk));
+
+int
 ftypeok(dp)
 	struct dinode *dp;
 {
@@ -69,6 +74,7 @@ ftypeok(dp)
 	}
 }
 
+int
 reply(question)
 	char *question;
 {
@@ -104,6 +110,7 @@ reply(question)
 /*
  * Malloc buffers and set up cache.
  */
+void
 bufinit()
 {
 	register struct bufarea *bp;
@@ -188,6 +195,7 @@ getblk(bp, blk, size)
 	}
 }
 
+void
 flush(fd, bp)
 	int fd;
 	register struct bufarea *bp;
@@ -213,6 +221,7 @@ flush(fd, bp)
 	}
 }
 
+void
 rwerror(mesg, blk)
 	char *mesg;
 	daddr_t blk;
@@ -225,6 +234,7 @@ rwerror(mesg, blk)
 		errexit("Program terminated\n");
 }
 
+void
 ckfini()
 {
 	register struct bufarea *bp, *nbp;
@@ -260,6 +270,7 @@ ckfini()
 	(void)close(fswritefd);
 }
 
+int
 bread(fd, buf, blk, size)
 	int fd;
 	char *buf;
@@ -298,6 +309,7 @@ bread(fd, buf, blk, size)
 	return (errs);
 }
 
+void
 bwrite(fd, buf, blk, size)
 	int fd;
 	char *buf;
@@ -334,6 +346,7 @@ bwrite(fd, buf, blk, size)
 /*
  * allocate a data block with the specified number of fragments
  */
+int
 allocblk(frags)
 	long frags;
 {
@@ -364,6 +377,7 @@ allocblk(frags)
 /*
  * Free a previously allocated block
  */
+void
 freeblk(blkno, frags)
 	daddr_t blkno;
 	long frags;
@@ -378,6 +392,7 @@ freeblk(blkno, frags)
 /*
  * Find a pathname
  */
+void
 getpathname(namebuf, curdir, ino)
 	char *namebuf;
 	ino_t curdir, ino;
@@ -386,7 +401,6 @@ getpathname(namebuf, curdir, ino)
 	register char *cp;
 	struct inodesc idesc;
 	static int busy = 0;
-	extern int findname();
 
 	if (curdir == ino && ino == ROOTINO) {
 		(void)strcpy(namebuf, "/");
@@ -435,7 +449,8 @@ getpathname(namebuf, curdir, ino)
 }
 
 void
-catch()
+catch(x)
+	int x;
 {
 	if (!doinglevel2)
 		ckfini();
@@ -448,10 +463,9 @@ catch()
  * so that reboot sequence may be interrupted.
  */
 void
-catchquit()
+catchquit(x)
+	int x;
 {
-	extern returntosingle;
-
 	printf("returning to single-user after filesystem check\n");
 	returntosingle = 1;
 	(void)signal(SIGQUIT, SIG_DFL);
@@ -462,7 +476,8 @@ catchquit()
  * Used by child processes in preen.
  */
 void
-voidquit()
+voidquit(x)
+	int x;
 {
 
 	sleep(1);
@@ -473,6 +488,7 @@ voidquit()
 /*
  * determine whether an inode should be fixed.
  */
+int
 dofix(idesc, msg)
 	register struct inodesc *idesc;
 	char *msg;
@@ -506,15 +522,19 @@ dofix(idesc, msg)
 
 	default:
 		errexit("UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix);
+		return (0);
 	}
 	/* NOTREACHED */
 }
 
 /* VARARGS1 */
-errexit(s1, s2, s3, s4)
-	char *s1;
+__dead void
+errexit(const char *s1, ...)
 {
-	printf(s1, s2, s3, s4);
+	va_list ap;
+	va_start(ap,s1);
+	vfprintf(stdout, s1, ap);
+	va_end(ap);
 	exit(8);
 }
 
@@ -523,19 +543,22 @@ errexit(s1, s2, s3, s4)
  * Die if preening, otherwise just print message and continue.
  */
 /* VARARGS1 */
-pfatal(s, a1, a2, a3)
-	char *s;
+void
+pfatal(const char *s, ...)
 {
 
+	va_list ap;
+	va_start(ap,s);
 	if (preen) {
 		printf("%s: ", cdevname);
-		printf(s, a1, a2, a3);
+		vfprintf(stdout, s, ap);
 		printf("\n");
 		printf("%s: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.\n",
 			cdevname);
 		exit(8);
 	}
-	printf(s, a1, a2, a3);
+	vfprintf(stdout, s, ap);
+	va_end(ap);
 }
 
 /*
@@ -543,24 +566,31 @@ pfatal(s, a1, a2, a3)
  * or a warning (preceded by filename) when preening.
  */
 /* VARARGS1 */
-pwarn(s, a1, a2, a3, a4, a5, a6)
-	char *s;
+void
+pwarn(const char *s, ...)
 {
-
+	va_list ap;
+	va_start(ap,s);
 	if (preen)
 		printf("%s: ", cdevname);
-	printf(s, a1, a2, a3, a4, a5, a6);
+	vfprintf(stdout, s, ap);
+	va_end(ap);
 }
 
 #ifndef lint
 /*
  * Stub for routines from kernel.
  */
-panic(s)
-	char *s;
+__dead void
+#ifdef __STDC__
+panic(const char *fmt, ...)
+#else
+panic(fmt, va_alist)
+	char *fmt;
+#endif
 {
 
 	pfatal("INTERNAL INCONSISTENCY:");
-	errexit(s);
+	errexit(fmt);
 }
 #endif
diff --git a/sbin/fsck_ffs/dir.c b/sbin/fsck_ffs/dir.c
index 77769cc729fa..b05109c804b2 100644
--- a/sbin/fsck_ffs/dir.c
+++ b/sbin/fsck_ffs/dir.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)dir.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)dir.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -40,6 +40,7 @@ static char sccsid[] = "@(#)dir.c	8.1 (Berkeley) 6/5/93";
 #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 "fsck.h"
@@ -56,12 +57,20 @@ struct	odirtemplate odirhead = {
 	0, DIRBLKSIZ - 12, 2, ".."
 };
 
-struct direct	*fsck_readdir();
-struct bufarea	*getdirblk();
+
+static int	chgino __P((struct inodesc *idesc));
+static int	dircheck __P((struct inodesc *idesc, struct direct *dp));
+static int	expanddir __P((struct dinode *dp, char *name));
+static void	freedir __P((ino_t ino, ino_t parent));
+static struct direct * fsck_readdir __P((struct inodesc *idesc));
+static struct bufarea * getdirblk __P((daddr_t blkno, long size));
+static int	lftempname __P((char *bufp, ino_t ino));
+static int	mkentry __P((struct inodesc *idesc));
 
 /*
  * Propagate connected state through the tree.
  */
+void
 propagate()
 {
 	register struct inoinfo **inpp, *inp;
@@ -87,6 +96,7 @@ propagate()
 /*
  * Scan each entry in a directory block.
  */
+int
 dirscan(idesc)
 	register struct inodesc *idesc;
 {
@@ -206,6 +216,7 @@ fsck_readdir(idesc)
  * Verify that a directory entry is valid.
  * This is a superset of the checks made in the kernel.
  */
+int
 dircheck(idesc, dp)
 	struct inodesc *idesc;
 	register struct direct *dp;
@@ -248,6 +259,7 @@ dircheck(idesc, dp)
 	return (0);
 }
 
+void
 direrror(ino, errmesg)
 	ino_t ino;
 	char *errmesg;
@@ -256,6 +268,7 @@ direrror(ino, errmesg)
 	fileerror(ino, ino, errmesg);
 }
 
+void
 fileerror(cwd, ino, errmesg)
 	ino_t cwd, ino;
 	char *errmesg;
@@ -279,6 +292,7 @@ fileerror(cwd, ino, errmesg)
 		pfatal("NAME=%s\n", pathbuf);
 }
 
+void
 adjust(idesc, lcnt)
 	register struct inodesc *idesc;
 	short lcnt;
@@ -309,6 +323,7 @@ adjust(idesc, lcnt)
 	}
 }
 
+int
 mkentry(idesc)
 	struct inodesc *idesc;
 {
@@ -345,6 +360,7 @@ mkentry(idesc)
 	return (ALTERED|STOP);
 }
 
+int
 chgino(idesc)
 	struct inodesc *idesc;
 {
@@ -360,6 +376,7 @@ chgino(idesc)
 	return (ALTERED|STOP);
 }
 
+int
 linkup(orphan, parentdir)
 	ino_t orphan;
 	ino_t parentdir;
@@ -369,7 +386,6 @@ linkup(orphan, parentdir)
 	ino_t oldlfdir;
 	struct inodesc idesc;
 	char tempname[BUFSIZ];
-	extern int pass4check();
 
 	bzero((char *)&idesc, sizeof(struct inodesc));
 	dp = ginode(orphan);
@@ -467,6 +483,7 @@ linkup(orphan, parentdir)
 /*
  * fix an entry in a directory.
  */
+int
 changeino(dir, name, newnum)
 	ino_t dir;
 	char *name;
@@ -487,6 +504,7 @@ changeino(dir, name, newnum)
 /*
  * make an entry in a directory
  */
+int
 makeentry(parent, ino, name)
 	ino_t parent, ino;
 	char *name;
@@ -522,6 +540,7 @@ makeentry(parent, ino, name)
 /*
  * Attempt to expand the size of a directory
  */
+int
 expanddir(dp, name)
 	register struct dinode *dp;
 	char *name;
@@ -578,6 +597,7 @@ expanddir(dp, name)
 /*
  * allocate a new directory
  */
+int
 allocdir(parent, request, mode)
 	ino_t parent, request;
 	int mode;
@@ -633,6 +653,7 @@ allocdir(parent, request, mode)
 /*
  * free a directory inode
  */
+static void
 freedir(ino, parent)
 	ino_t ino, parent;
 {
@@ -649,6 +670,7 @@ freedir(ino, parent)
 /*
  * generate a temporary name for the lost+found directory.
  */
+int
 lftempname(bufp, ino)
 	char *bufp;
 	ino_t ino;
diff --git a/sbin/fsck_ffs/fsck.h b/sbin/fsck_ffs/fsck.h
index 0a49e4c55c24..bfa554abb3fb 100644
--- a/sbin/fsck_ffs/fsck.h
+++ b/sbin/fsck_ffs/fsck.h
@@ -179,13 +179,14 @@ char	havesb;			/* superblock has been read */
 int	fsmodified;		/* 1 => write done to file system */
 int	fsreadfd;		/* file descriptor for reading file system */
 int	fswritefd;		/* file descriptor for writing file system */
+int	returntosingle;		/* return to single user mode */
 
 daddr_t	maxfsblock;		/* number of blocks in the file system */
 char	*blockmap;		/* ptr to primary blk allocation map */
 ino_t	maxino;			/* number of inodes in file system */
 ino_t	lastino;		/* last inode in use */
 char	*statemap;		/* ptr to inode state table */
-char	*typemap;		/* ptr to inode type table */
+unsigned char	*typemap;	/* ptr to inode type table */
 short	*lncntp;		/* ptr to link count table */
 
 ino_t	lfdir;			/* lost & found directory inode number */
@@ -208,9 +209,84 @@ struct	dinode zino;
 #define	ALTERED	0x08
 #define	FOUND	0x10
 
-time_t time();
-struct dinode *ginode();
-struct inoinfo *getinoinfo();
-void getblk();
-ino_t allocino();
-int findino();
+/* dir.c */
+void	adjust __P((struct inodesc *idesc, short lcnt));
+int	allocdir __P((ino_t parent, ino_t request, int mode));
+int	changeino __P((ino_t dir, char *name, ino_t newnum));
+void	direrror __P((ino_t ino, char *errmesg));
+int	dirscan __P((struct inodesc *idesc));
+void	fileerror __P((ino_t cwd, ino_t ino, char *errmesg));
+int	linkup __P((ino_t orphan, ino_t parentdir));
+int	makeentry __P((ino_t parent, ino_t ino, char *name));
+void	propagate __P((void));
+
+/* ffs_subr.c */
+void	ffs_fragacct __P((struct fs *fs, int fragmap, long *fraglist, int cnt));
+
+/* inode.c */
+ino_t	allocino __P((ino_t request, int type));
+void	blkerror __P((ino_t ino, char *type, daddr_t blk));
+void	cacheino __P((struct dinode *dp, ino_t inumber));
+int	chkrange __P((daddr_t blk, int cnt));
+int	ckinode __P((struct dinode *dp, struct inodesc *idesc));
+void	clri __P((struct inodesc *idesc, char *type, int flag));
+int	findino __P((struct inodesc *idesc));
+void	freeino __P((ino_t ino));
+void	freeinodebuf __P((void));
+struct dinode * ginode __P((ino_t inumber));
+struct inoinfo * getinoinfo __P((ino_t inumber));
+struct dinode * getnextinode __P((ino_t inumber));
+void	inodirty __P((void));
+void	inocleanup __P((void));
+void	pinode __P((ino_t ino));
+void	resetinodebuf __P((void));
+int	findname __P((struct inodesc *idesc));
+
+/* pass1.c */
+void	pass1 __P((void));
+int	pass1check __P((struct inodesc *idesc));
+
+/* pass1b.c */
+void	pass1b __P((void));
+
+/* pass2.c */
+void	pass2 __P((void));
+
+/* pass3.c */
+void	pass3 __P((void));
+
+/* pass4.c */
+void	pass4 __P((void));
+int	pass4check __P((struct inodesc *idesc));
+
+/* pass5.c */
+void	pass5 __P((void));
+
+/* preen.c */
+char	*blockcheck __P((char *name));
+int	checkfstab __P((int preen, int maxrun,int (*docheck)(), int (*chkit)()));
+
+/* setup.c */
+int	setup __P((char *dev));
+
+/* utilities.c */
+int	allocblk __P((long frags));
+int	bread __P((int fd, char *buf, daddr_t blk, long size));
+void	bufinit __P((void));
+void	bwrite __P((int fd, char *buf, daddr_t blk, long size));
+void	catch __P((int));
+void	catchquit __P((int));
+void	ckfini __P((void));
+int	dofix __P((struct inodesc *idesc, char *msg));
+__dead void errexit __P((const char *s1, ...)) __dead2;
+void	flush __P((int fd, struct bufarea *bp));
+void	freeblk __P((daddr_t blkno, long frags));
+int	ftypeok __P((struct dinode *dp));
+void	getblk __P((struct bufarea *bp, daddr_t blk, long size));
+struct bufarea * getdatablk __P((daddr_t blkno, long size));
+void	getpathname __P((char *namebuf, ino_t curdir, ino_t ino));
+__dead void panic __P((const char *, ...)) __dead2;
+void	pfatal __P((const char *s1, ...));
+void	pwarn __P((const char *s1, ...));
+int	reply __P((char *question));
+void	voidquit __P((int));
diff --git a/sbin/fsck_ffs/inode.c b/sbin/fsck_ffs/inode.c
index 56b978fa30dd..dcf2d89b28a4 100644
--- a/sbin/fsck_ffs/inode.c
+++ b/sbin/fsck_ffs/inode.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)inode.c	8.5 (Berkeley) 2/8/95";
+static const char sccsid[] = "@(#)inode.c	8.5 (Berkeley) 2/8/95";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -41,12 +41,16 @@ static char sccsid[] = "@(#)inode.c	8.5 (Berkeley) 2/8/95";
 #include <ufs/ufs/dir.h>
 #include <ufs/ffs/fs.h>
 #include <pwd.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include "fsck.h"
 
 static ino_t startinum;
 
+static int	iblock __P((struct inodesc *idesc, long ilevel, quad_t isize));
+
+int
 ckinode(dp, idesc)
 	struct dinode *dp;
 	register struct inodesc *idesc;
@@ -99,6 +103,7 @@ ckinode(dp, idesc)
 	return (KEEPON);
 }
 
+static int
 iblock(idesc, ilevel, isize)
 	struct inodesc *idesc;
 	long ilevel;
@@ -110,7 +115,6 @@ iblock(idesc, ilevel, isize)
 	int i, n, (*func)(), nif;
 	quad_t sizepb;
 	char buf[BUFSIZ];
-	extern int dirscan(), pass1check();
 
 	if (idesc->id_type == ADDR) {
 		func = idesc->id_func;
@@ -164,6 +168,7 @@ iblock(idesc, ilevel, isize)
  * Check that a block in a legal block number.
  * Return 0 if in range, 1 if out of range.
  */
+int
 chkrange(blk, cnt)
 	daddr_t blk;
 	int cnt;
@@ -253,6 +258,7 @@ getnextinode(inumber)
 	return (dp++);
 }
 
+void
 resetinodebuf()
 {
 
@@ -278,6 +284,7 @@ resetinodebuf()
 		(void)getnextinode(nextino);
 }
 
+void
 freeinodebuf()
 {
 
@@ -293,6 +300,7 @@ freeinodebuf()
  *
  * Enter inodes into the cache.
  */
+void
 cacheino(dp, inumber)
 	register struct dinode *dp;
 	ino_t inumber;
@@ -352,6 +360,7 @@ getinoinfo(inumber)
 /*
  * Clean up all the inode cache structure.
  */
+void
 inocleanup()
 {
 	register struct inoinfo **inpp;
@@ -365,12 +374,13 @@ inocleanup()
 	inphead = inpsort = NULL;
 }
 	
+void
 inodirty()
 {
-	
 	dirty(pbp);
 }
 
+void
 clri(idesc, type, flag)
 	register struct inodesc *idesc;
 	char *type;
@@ -395,6 +405,7 @@ clri(idesc, type, flag)
 	}
 }
 
+int
 findname(idesc)
 	struct inodesc *idesc;
 {
@@ -406,6 +417,7 @@ findname(idesc)
 	return (STOP|FOUND);
 }
 
+int
 findino(idesc)
 	struct inodesc *idesc;
 {
@@ -421,6 +433,7 @@ findino(idesc)
 	return (KEEPON);
 }
 
+void
 pinode(ino)
 	ino_t ino;
 {
@@ -446,6 +459,7 @@ pinode(ino)
 	printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]);
 }
 
+void
 blkerror(ino, type, blk)
 	ino_t ino;
 	char *type;
@@ -526,11 +540,11 @@ allocino(request, type)
 /*
  * deallocate an inode
  */
+void
 freeino(ino)
 	ino_t ino;
 {
 	struct inodesc idesc;
-	extern int pass4check();
 	struct dinode *dp;
 
 	bzero((char *)&idesc, sizeof(struct inodesc));
diff --git a/sbin/fsck_ffs/main.c b/sbin/fsck_ffs/main.c
index 5ff6918a131e..1a6cd44f55d1 100644
--- a/sbin/fsck_ffs/main.c
+++ b/sbin/fsck_ffs/main.c
@@ -32,13 +32,13 @@
  */
 
 #ifndef lint
-static char copyright[] =
+static const 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	8.2 (Berkeley) 1/23/94";
+static const char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -49,22 +49,24 @@ static char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
 #include <ufs/ffs/fs.h>
 #include <fstab.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <string.h>
 #include <ctype.h>
 #include <stdio.h>
 #include "fsck.h"
+static int	argtoi __P((int flag, char *req, char *str, int base));
+static int	docheck __P((struct fstab *fsp));
+static int	checkfilesys __P((char *filesys, char *mntpt, long auxdata,
+				  int child));
 
-void	catch(), catchquit(), voidquit();
-int	returntosingle;
-
+int
 main(argc, argv)
 	int	argc;
 	char	*argv[];
 {
 	int ch;
 	int ret, maxrun = 0;
-	extern int docheck(), checkfilesys();
-	extern char *optarg, *blockcheck();
+	extern char *optarg;
 	extern int optind;
 
 	sync();
@@ -135,6 +137,7 @@ main(argc, argv)
 	exit(ret);
 }
 
+int
 argtoi(flag, req, str, base)
 	int flag;
 	char *req, *str;
@@ -152,6 +155,7 @@ argtoi(flag, req, str, base)
 /*
  * Determine whether a filesystem should be checked.
  */
+int
 docheck(fsp)
 	register struct fstab *fsp;
 {
@@ -168,9 +172,11 @@ docheck(fsp)
  * Check the specified filesystem.
  */
 /* ARGSUSED */
+int
 checkfilesys(filesys, mntpt, auxdata, child)
 	char *filesys, *mntpt;
 	long auxdata;
+	int child;
 {
 	daddr_t n_ffree, n_bfree;
 	struct dups *dp;
@@ -255,7 +261,7 @@ checkfilesys(filesys, mntpt, auxdata, child)
 	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",
+	printf("(%ld frags, %ld blocks, %ld.%ld%% 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 &&
diff --git a/sbin/fsck_ffs/pass1.c b/sbin/fsck_ffs/pass1.c
index 7d8e507e1ce4..70ce40afce16 100644
--- a/sbin/fsck_ffs/pass1.c
+++ b/sbin/fsck_ffs/pass1.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass1.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass1.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -40,15 +40,17 @@ static char sccsid[] = "@(#)pass1.c	8.1 (Berkeley) 6/5/93";
 #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 "fsck.h"
 
 static daddr_t badblk;
 static daddr_t dupblk;
-int pass1check();
-struct dinode *getnextinode();
 
+static void	checkinode __P((ino_t inumber, struct inodesc *idesc));
+
+void
 pass1()
 {
 	ino_t inumber;
@@ -87,6 +89,7 @@ pass1()
 	freeinodebuf();
 }
 
+void
 checkinode(inumber, idesc)
 	ino_t inumber;
 	register struct inodesc *idesc;
@@ -148,7 +151,7 @@ checkinode(inumber, idesc)
 				errexit("cannot read symlink");
 			if (debug) {
 				symbuf[dp->di_size] = 0;
-				printf("convert symlink %d(%s) of size %d\n",
+				printf("convert symlink %ld(%s) of size %ld\n",
 					inumber, symbuf, (long)dp->di_size);
 			}
 			dp = ginode(inumber);
@@ -247,6 +250,7 @@ checkinode(inumber, idesc)
 	}
 }
 
+int
 pass1check(idesc)
 	register struct inodesc *idesc;
 {
diff --git a/sbin/fsck_ffs/pass1b.c b/sbin/fsck_ffs/pass1b.c
index 27b2dfd6238c..1450bd80e0a3 100644
--- a/sbin/fsck_ffs/pass1b.c
+++ b/sbin/fsck_ffs/pass1b.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass1b.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass1b.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -45,6 +45,7 @@ static char sccsid[] = "@(#)pass1b.c	8.1 (Berkeley) 6/5/93";
 int	pass1bcheck();
 static  struct dups *duphead;
 
+void
 pass1b()
 {
 	register int c, i;
@@ -72,6 +73,7 @@ pass1b()
 	}
 }
 
+int
 pass1bcheck(idesc)
 	register struct inodesc *idesc;
 {
diff --git a/sbin/fsck_ffs/pass2.c b/sbin/fsck_ffs/pass2.c
index 631475174372..82cbe0afd0f1 100644
--- a/sbin/fsck_ffs/pass2.c
+++ b/sbin/fsck_ffs/pass2.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
+static const char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -40,6 +40,7 @@ static char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
 #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 "fsck.h"
@@ -48,6 +49,7 @@ static char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
 
 int	pass2check(), blksort();
 
+void
 pass2()
 {
 	register struct dinode *dp;
@@ -189,6 +191,7 @@ pass2()
 	propagate();
 }
 
+int
 pass2check(idesc)
 	struct inodesc *idesc;
 {
@@ -422,6 +425,7 @@ pass2check(idesc)
 /*
  * Routine to sort disk blocks.
  */
+int
 blksort(inpp1, inpp2)
 	struct inoinfo **inpp1, **inpp2;
 {
diff --git a/sbin/fsck_ffs/pass3.c b/sbin/fsck_ffs/pass3.c
index 5c6f09d041de..963c41a28c5c 100644
--- a/sbin/fsck_ffs/pass3.c
+++ b/sbin/fsck_ffs/pass3.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass3.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass3.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -41,6 +41,7 @@ static char sccsid[] = "@(#)pass3.c	8.1 (Berkeley) 6/5/93";
 #include <ufs/ffs/fs.h>
 #include "fsck.h"
 
+void
 pass3()
 {
 	register struct inoinfo **inpp, *inp;
diff --git a/sbin/fsck_ffs/pass4.c b/sbin/fsck_ffs/pass4.c
index 7450530e8a4e..df8f72247186 100644
--- a/sbin/fsck_ffs/pass4.c
+++ b/sbin/fsck_ffs/pass4.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -45,6 +45,7 @@ static char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
 
 int	pass4check();
 
+void
 pass4()
 {
 	register ino_t inumber;
@@ -103,6 +104,7 @@ pass4()
 	}
 }
 
+int
 pass4check(idesc)
 	register struct inodesc *idesc;
 {
diff --git a/sbin/fsck_ffs/pass5.c b/sbin/fsck_ffs/pass5.c
index 7e8b2ef061b2..7972468bd251 100644
--- a/sbin/fsck_ffs/pass5.c
+++ b/sbin/fsck_ffs/pass5.c
@@ -32,19 +32,21 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass5.c	8.2 (Berkeley) 2/2/94";
+static const char sccsid[] = "@(#)pass5.c	8.2 (Berkeley) 2/2/94";
 #endif /* not lint */
 
 #include <sys/param.h>
 #include <sys/time.h>
 #include <ufs/ufs/dinode.h>
 #include <ufs/ffs/fs.h>
+#include <stdio.h>
 #include <string.h>
 #include "fsck.h"
 
+void
 pass5()
 {
-	int c, blk, frags, basesize, sumsize, mapsize, savednrpos;
+	int c, blk, frags, basesize, sumsize, mapsize, savednrpos = 0;
 	register struct fs *fs = &sblock;
 	register struct cg *cg = &cgrp;
 	daddr_t dbase, dmax;
diff --git a/sbin/fsck_ffs/preen.c b/sbin/fsck_ffs/preen.c
index 005a65d97989..1cdb01d6e977 100644
--- a/sbin/fsck_ffs/preen.c
+++ b/sbin/fsck_ffs/preen.c
@@ -32,19 +32,20 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)preen.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)preen.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
+#include <ufs/ufs/dinode.h>
 #include <fstab.h>
 #include <string.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <stdlib.h>
 #include <ctype.h>
-
-char	*rawname(), *unrawname(), *blockcheck();
+#include "fsck.h"
 
 struct part {
 	struct	part *next;		/* forward link of partitions on disk */
@@ -60,9 +61,16 @@ struct disk {
 	int	pid;			/* If != 0, pid of proc working on */
 } *disks;
 
+static void	addpart __P((char *name, char *fsname, long auxdata));
+static int	startdisk __P((struct disk *dk, int (*checkit)()));
+static struct disk 	*finddisk __P((char *name));
+static char 	*unrawname __P((char *name));
+static char 	*rawname __P((char *name));
+
 int	nrun, ndisks;
 char	hotroot;
 
+int
 checkfstab(preen, maxrun, docheck, chkit)
 	int preen, maxrun;
 	int (*docheck)(), (*chkit)();
@@ -84,10 +92,12 @@ checkfstab(preen, maxrun, docheck, chkit)
 		while ((fsp = getfsent()) != 0) {
 			if ((auxdata = (*docheck)(fsp)) == 0)
 				continue;
-			if (preen == 0 || passno == 1 && fsp->fs_passno == 1) {
-				if (name = blockcheck(fsp->fs_spec)) {
-					if (sumstatus = (*chkit)(name,
-					    fsp->fs_file, auxdata, 0))
+			if (!preen || (passno == 1 && fsp->fs_passno == 1)) {
+				name = blockcheck(fsp->fs_spec);
+				if (name) {
+					sumstatus = (*chkit)(name,
+					    fsp->fs_file, auxdata, 0);
+					if (sumstatus)
 						return (sumstatus);
 				} else if (preen)
 					return (8);
@@ -111,7 +121,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 			maxrun = ndisks;
 		nextdisk = disks;
 		for (passno = 0; passno < maxrun; ++passno) {
-			while (ret = startdisk(nextdisk, chkit) && nrun > 0)
+			while ((ret = startdisk(nextdisk, chkit)) != 0 && 
+			    nrun > 0)
 				sleep(10);
 			if (ret)
 				return (ret);
@@ -150,8 +161,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 
 			if (nextdisk == NULL) {
 				if (dk->part) {
-					while (ret = startdisk(dk, chkit) &&
-					    nrun > 0)
+					while ((ret = startdisk(dk, chkit)) != 0
+					    && nrun > 0)
 						sleep(10);
 					if (ret)
 						return (ret);
@@ -164,8 +175,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 					    nextdisk->pid == 0)
 						break;
 				}
-				while (ret = startdisk(nextdisk, chkit) &&
-				    nrun > 0)
+				while ((ret = startdisk(nextdisk, chkit)) != 0
+				    && nrun > 0)
 					sleep(10);
 				if (ret)
 					return (ret);
@@ -192,7 +203,7 @@ finddisk(name)
 {
 	register struct disk *dk, **dkp;
 	register char *p;
-	size_t len;
+	size_t len = 0;
 
 	for (p = name + strlen(name) - 1; p >= name; --p)
 		if (isdigit(*p)) {
@@ -225,6 +236,7 @@ finddisk(name)
 	return (dk);
 }
 
+void
 addpart(name, fsname, auxdata)
 	char *name, *fsname;
 	long auxdata;
@@ -256,6 +268,7 @@ addpart(name, fsname, auxdata)
 	pt->auxdata = auxdata;
 }
 
+int
 startdisk(dk, checkit)
 	register struct disk *dk;
 	int (*checkit)();
diff --git a/sbin/fsck_ffs/setup.c b/sbin/fsck_ffs/setup.c
index fb1c1d9113ff..fe6f2ea95e4d 100644
--- a/sbin/fsck_ffs/setup.c
+++ b/sbin/fsck_ffs/setup.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
+static const char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
 #endif /* not lint */
 
 #define DKTYPENAMES
@@ -45,6 +45,7 @@ static char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
 #include <sys/disklabel.h>
 #include <sys/file.h>
 #include <errno.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
@@ -54,8 +55,13 @@ struct bufarea asblk;
 #define altsblock (*asblk.b_un.b_fs)
 #define POWEROF2(num)	(((num) & ((num) - 1)) == 0)
 
-struct	disklabel *getdisklabel();
+static int	readsb __P((int listerr));
+static void	badsb __P((int listerr, char *s));
+static int	calcsb __P((char *dev, int devfd, struct fs *fs));
+static struct disklabel * getdisklabel __P((char *s, int fd));
 
+
+int
 setup(dev)
 	char *dev;
 {
@@ -99,7 +105,8 @@ setup(dev)
 	asblk.b_un.b_buf = malloc(SBSIZE);
 	if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
 		errexit("cannot allocate space for superblock\n");
-	if (lp = getdisklabel((char *)NULL, fsreadfd))
+	lp = getdisklabel((char *)NULL, fsreadfd);
+	if (lp)
 		dev_bsize = secsize = lp->d_secsize;
 	else
 		dev_bsize = secsize = DEV_BSIZE;
@@ -297,6 +304,7 @@ setup(dev)
 /*
  * Read in the super block and its summary info.
  */
+static int
 readsb(listerr)
 	int listerr;
 {
@@ -380,6 +388,7 @@ readsb(listerr)
 	return (1);
 }
 
+static void
 badsb(listerr, s)
 	int listerr;
 	char *s;
@@ -398,6 +407,7 @@ badsb(listerr, s)
  * can be used. Do NOT attempt to use other macros without verifying that
  * their needed information is available!
  */
+int
 calcsb(dev, devfd, fs)
 	char *dev;
 	int devfd;
@@ -409,7 +419,7 @@ calcsb(dev, devfd, fs)
 	int i;
 
 	cp = index(dev, '\0') - 1;
-	if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) {
+	if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) {
 		pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
 		return (0);
 	}
diff --git a/sbin/fsck_ffs/utilities.c b/sbin/fsck_ffs/utilities.c
index 64a4cac19ab3..e8a872dbc21e 100644
--- a/sbin/fsck_ffs/utilities.c
+++ b/sbin/fsck_ffs/utilities.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -42,12 +42,17 @@ static char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
 #include <ufs/ffs/fs.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <stdarg.h>
 #include <string.h>
 #include <ctype.h>
 #include "fsck.h"
 
 long	diskreads, totalreads;	/* Disk cache statistics */
 
+static void	rwerror __P((char *mesg, daddr_t blk));
+
+int
 ftypeok(dp)
 	struct dinode *dp;
 {
@@ -69,6 +74,7 @@ ftypeok(dp)
 	}
 }
 
+int
 reply(question)
 	char *question;
 {
@@ -104,6 +110,7 @@ reply(question)
 /*
  * Malloc buffers and set up cache.
  */
+void
 bufinit()
 {
 	register struct bufarea *bp;
@@ -188,6 +195,7 @@ getblk(bp, blk, size)
 	}
 }
 
+void
 flush(fd, bp)
 	int fd;
 	register struct bufarea *bp;
@@ -213,6 +221,7 @@ flush(fd, bp)
 	}
 }
 
+void
 rwerror(mesg, blk)
 	char *mesg;
 	daddr_t blk;
@@ -225,6 +234,7 @@ rwerror(mesg, blk)
 		errexit("Program terminated\n");
 }
 
+void
 ckfini()
 {
 	register struct bufarea *bp, *nbp;
@@ -260,6 +270,7 @@ ckfini()
 	(void)close(fswritefd);
 }
 
+int
 bread(fd, buf, blk, size)
 	int fd;
 	char *buf;
@@ -298,6 +309,7 @@ bread(fd, buf, blk, size)
 	return (errs);
 }
 
+void
 bwrite(fd, buf, blk, size)
 	int fd;
 	char *buf;
@@ -334,6 +346,7 @@ bwrite(fd, buf, blk, size)
 /*
  * allocate a data block with the specified number of fragments
  */
+int
 allocblk(frags)
 	long frags;
 {
@@ -364,6 +377,7 @@ allocblk(frags)
 /*
  * Free a previously allocated block
  */
+void
 freeblk(blkno, frags)
 	daddr_t blkno;
 	long frags;
@@ -378,6 +392,7 @@ freeblk(blkno, frags)
 /*
  * Find a pathname
  */
+void
 getpathname(namebuf, curdir, ino)
 	char *namebuf;
 	ino_t curdir, ino;
@@ -386,7 +401,6 @@ getpathname(namebuf, curdir, ino)
 	register char *cp;
 	struct inodesc idesc;
 	static int busy = 0;
-	extern int findname();
 
 	if (curdir == ino && ino == ROOTINO) {
 		(void)strcpy(namebuf, "/");
@@ -435,7 +449,8 @@ getpathname(namebuf, curdir, ino)
 }
 
 void
-catch()
+catch(x)
+	int x;
 {
 	if (!doinglevel2)
 		ckfini();
@@ -448,10 +463,9 @@ catch()
  * so that reboot sequence may be interrupted.
  */
 void
-catchquit()
+catchquit(x)
+	int x;
 {
-	extern returntosingle;
-
 	printf("returning to single-user after filesystem check\n");
 	returntosingle = 1;
 	(void)signal(SIGQUIT, SIG_DFL);
@@ -462,7 +476,8 @@ catchquit()
  * Used by child processes in preen.
  */
 void
-voidquit()
+voidquit(x)
+	int x;
 {
 
 	sleep(1);
@@ -473,6 +488,7 @@ voidquit()
 /*
  * determine whether an inode should be fixed.
  */
+int
 dofix(idesc, msg)
 	register struct inodesc *idesc;
 	char *msg;
@@ -506,15 +522,19 @@ dofix(idesc, msg)
 
 	default:
 		errexit("UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix);
+		return (0);
 	}
 	/* NOTREACHED */
 }
 
 /* VARARGS1 */
-errexit(s1, s2, s3, s4)
-	char *s1;
+__dead void
+errexit(const char *s1, ...)
 {
-	printf(s1, s2, s3, s4);
+	va_list ap;
+	va_start(ap,s1);
+	vfprintf(stdout, s1, ap);
+	va_end(ap);
 	exit(8);
 }
 
@@ -523,19 +543,22 @@ errexit(s1, s2, s3, s4)
  * Die if preening, otherwise just print message and continue.
  */
 /* VARARGS1 */
-pfatal(s, a1, a2, a3)
-	char *s;
+void
+pfatal(const char *s, ...)
 {
 
+	va_list ap;
+	va_start(ap,s);
 	if (preen) {
 		printf("%s: ", cdevname);
-		printf(s, a1, a2, a3);
+		vfprintf(stdout, s, ap);
 		printf("\n");
 		printf("%s: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.\n",
 			cdevname);
 		exit(8);
 	}
-	printf(s, a1, a2, a3);
+	vfprintf(stdout, s, ap);
+	va_end(ap);
 }
 
 /*
@@ -543,24 +566,31 @@ pfatal(s, a1, a2, a3)
  * or a warning (preceded by filename) when preening.
  */
 /* VARARGS1 */
-pwarn(s, a1, a2, a3, a4, a5, a6)
-	char *s;
+void
+pwarn(const char *s, ...)
 {
-
+	va_list ap;
+	va_start(ap,s);
 	if (preen)
 		printf("%s: ", cdevname);
-	printf(s, a1, a2, a3, a4, a5, a6);
+	vfprintf(stdout, s, ap);
+	va_end(ap);
 }
 
 #ifndef lint
 /*
  * Stub for routines from kernel.
  */
-panic(s)
-	char *s;
+__dead void
+#ifdef __STDC__
+panic(const char *fmt, ...)
+#else
+panic(fmt, va_alist)
+	char *fmt;
+#endif
 {
 
 	pfatal("INTERNAL INCONSISTENCY:");
-	errexit(s);
+	errexit(fmt);
 }
 #endif
diff --git a/sbin/fsck_ifs/dir.c b/sbin/fsck_ifs/dir.c
index 77769cc729fa..b05109c804b2 100644
--- a/sbin/fsck_ifs/dir.c
+++ b/sbin/fsck_ifs/dir.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)dir.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)dir.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -40,6 +40,7 @@ static char sccsid[] = "@(#)dir.c	8.1 (Berkeley) 6/5/93";
 #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 "fsck.h"
@@ -56,12 +57,20 @@ struct	odirtemplate odirhead = {
 	0, DIRBLKSIZ - 12, 2, ".."
 };
 
-struct direct	*fsck_readdir();
-struct bufarea	*getdirblk();
+
+static int	chgino __P((struct inodesc *idesc));
+static int	dircheck __P((struct inodesc *idesc, struct direct *dp));
+static int	expanddir __P((struct dinode *dp, char *name));
+static void	freedir __P((ino_t ino, ino_t parent));
+static struct direct * fsck_readdir __P((struct inodesc *idesc));
+static struct bufarea * getdirblk __P((daddr_t blkno, long size));
+static int	lftempname __P((char *bufp, ino_t ino));
+static int	mkentry __P((struct inodesc *idesc));
 
 /*
  * Propagate connected state through the tree.
  */
+void
 propagate()
 {
 	register struct inoinfo **inpp, *inp;
@@ -87,6 +96,7 @@ propagate()
 /*
  * Scan each entry in a directory block.
  */
+int
 dirscan(idesc)
 	register struct inodesc *idesc;
 {
@@ -206,6 +216,7 @@ fsck_readdir(idesc)
  * Verify that a directory entry is valid.
  * This is a superset of the checks made in the kernel.
  */
+int
 dircheck(idesc, dp)
 	struct inodesc *idesc;
 	register struct direct *dp;
@@ -248,6 +259,7 @@ dircheck(idesc, dp)
 	return (0);
 }
 
+void
 direrror(ino, errmesg)
 	ino_t ino;
 	char *errmesg;
@@ -256,6 +268,7 @@ direrror(ino, errmesg)
 	fileerror(ino, ino, errmesg);
 }
 
+void
 fileerror(cwd, ino, errmesg)
 	ino_t cwd, ino;
 	char *errmesg;
@@ -279,6 +292,7 @@ fileerror(cwd, ino, errmesg)
 		pfatal("NAME=%s\n", pathbuf);
 }
 
+void
 adjust(idesc, lcnt)
 	register struct inodesc *idesc;
 	short lcnt;
@@ -309,6 +323,7 @@ adjust(idesc, lcnt)
 	}
 }
 
+int
 mkentry(idesc)
 	struct inodesc *idesc;
 {
@@ -345,6 +360,7 @@ mkentry(idesc)
 	return (ALTERED|STOP);
 }
 
+int
 chgino(idesc)
 	struct inodesc *idesc;
 {
@@ -360,6 +376,7 @@ chgino(idesc)
 	return (ALTERED|STOP);
 }
 
+int
 linkup(orphan, parentdir)
 	ino_t orphan;
 	ino_t parentdir;
@@ -369,7 +386,6 @@ linkup(orphan, parentdir)
 	ino_t oldlfdir;
 	struct inodesc idesc;
 	char tempname[BUFSIZ];
-	extern int pass4check();
 
 	bzero((char *)&idesc, sizeof(struct inodesc));
 	dp = ginode(orphan);
@@ -467,6 +483,7 @@ linkup(orphan, parentdir)
 /*
  * fix an entry in a directory.
  */
+int
 changeino(dir, name, newnum)
 	ino_t dir;
 	char *name;
@@ -487,6 +504,7 @@ changeino(dir, name, newnum)
 /*
  * make an entry in a directory
  */
+int
 makeentry(parent, ino, name)
 	ino_t parent, ino;
 	char *name;
@@ -522,6 +540,7 @@ makeentry(parent, ino, name)
 /*
  * Attempt to expand the size of a directory
  */
+int
 expanddir(dp, name)
 	register struct dinode *dp;
 	char *name;
@@ -578,6 +597,7 @@ expanddir(dp, name)
 /*
  * allocate a new directory
  */
+int
 allocdir(parent, request, mode)
 	ino_t parent, request;
 	int mode;
@@ -633,6 +653,7 @@ allocdir(parent, request, mode)
 /*
  * free a directory inode
  */
+static void
 freedir(ino, parent)
 	ino_t ino, parent;
 {
@@ -649,6 +670,7 @@ freedir(ino, parent)
 /*
  * generate a temporary name for the lost+found directory.
  */
+int
 lftempname(bufp, ino)
 	char *bufp;
 	ino_t ino;
diff --git a/sbin/fsck_ifs/fsck.h b/sbin/fsck_ifs/fsck.h
index 0a49e4c55c24..bfa554abb3fb 100644
--- a/sbin/fsck_ifs/fsck.h
+++ b/sbin/fsck_ifs/fsck.h
@@ -179,13 +179,14 @@ char	havesb;			/* superblock has been read */
 int	fsmodified;		/* 1 => write done to file system */
 int	fsreadfd;		/* file descriptor for reading file system */
 int	fswritefd;		/* file descriptor for writing file system */
+int	returntosingle;		/* return to single user mode */
 
 daddr_t	maxfsblock;		/* number of blocks in the file system */
 char	*blockmap;		/* ptr to primary blk allocation map */
 ino_t	maxino;			/* number of inodes in file system */
 ino_t	lastino;		/* last inode in use */
 char	*statemap;		/* ptr to inode state table */
-char	*typemap;		/* ptr to inode type table */
+unsigned char	*typemap;	/* ptr to inode type table */
 short	*lncntp;		/* ptr to link count table */
 
 ino_t	lfdir;			/* lost & found directory inode number */
@@ -208,9 +209,84 @@ struct	dinode zino;
 #define	ALTERED	0x08
 #define	FOUND	0x10
 
-time_t time();
-struct dinode *ginode();
-struct inoinfo *getinoinfo();
-void getblk();
-ino_t allocino();
-int findino();
+/* dir.c */
+void	adjust __P((struct inodesc *idesc, short lcnt));
+int	allocdir __P((ino_t parent, ino_t request, int mode));
+int	changeino __P((ino_t dir, char *name, ino_t newnum));
+void	direrror __P((ino_t ino, char *errmesg));
+int	dirscan __P((struct inodesc *idesc));
+void	fileerror __P((ino_t cwd, ino_t ino, char *errmesg));
+int	linkup __P((ino_t orphan, ino_t parentdir));
+int	makeentry __P((ino_t parent, ino_t ino, char *name));
+void	propagate __P((void));
+
+/* ffs_subr.c */
+void	ffs_fragacct __P((struct fs *fs, int fragmap, long *fraglist, int cnt));
+
+/* inode.c */
+ino_t	allocino __P((ino_t request, int type));
+void	blkerror __P((ino_t ino, char *type, daddr_t blk));
+void	cacheino __P((struct dinode *dp, ino_t inumber));
+int	chkrange __P((daddr_t blk, int cnt));
+int	ckinode __P((struct dinode *dp, struct inodesc *idesc));
+void	clri __P((struct inodesc *idesc, char *type, int flag));
+int	findino __P((struct inodesc *idesc));
+void	freeino __P((ino_t ino));
+void	freeinodebuf __P((void));
+struct dinode * ginode __P((ino_t inumber));
+struct inoinfo * getinoinfo __P((ino_t inumber));
+struct dinode * getnextinode __P((ino_t inumber));
+void	inodirty __P((void));
+void	inocleanup __P((void));
+void	pinode __P((ino_t ino));
+void	resetinodebuf __P((void));
+int	findname __P((struct inodesc *idesc));
+
+/* pass1.c */
+void	pass1 __P((void));
+int	pass1check __P((struct inodesc *idesc));
+
+/* pass1b.c */
+void	pass1b __P((void));
+
+/* pass2.c */
+void	pass2 __P((void));
+
+/* pass3.c */
+void	pass3 __P((void));
+
+/* pass4.c */
+void	pass4 __P((void));
+int	pass4check __P((struct inodesc *idesc));
+
+/* pass5.c */
+void	pass5 __P((void));
+
+/* preen.c */
+char	*blockcheck __P((char *name));
+int	checkfstab __P((int preen, int maxrun,int (*docheck)(), int (*chkit)()));
+
+/* setup.c */
+int	setup __P((char *dev));
+
+/* utilities.c */
+int	allocblk __P((long frags));
+int	bread __P((int fd, char *buf, daddr_t blk, long size));
+void	bufinit __P((void));
+void	bwrite __P((int fd, char *buf, daddr_t blk, long size));
+void	catch __P((int));
+void	catchquit __P((int));
+void	ckfini __P((void));
+int	dofix __P((struct inodesc *idesc, char *msg));
+__dead void errexit __P((const char *s1, ...)) __dead2;
+void	flush __P((int fd, struct bufarea *bp));
+void	freeblk __P((daddr_t blkno, long frags));
+int	ftypeok __P((struct dinode *dp));
+void	getblk __P((struct bufarea *bp, daddr_t blk, long size));
+struct bufarea * getdatablk __P((daddr_t blkno, long size));
+void	getpathname __P((char *namebuf, ino_t curdir, ino_t ino));
+__dead void panic __P((const char *, ...)) __dead2;
+void	pfatal __P((const char *s1, ...));
+void	pwarn __P((const char *s1, ...));
+int	reply __P((char *question));
+void	voidquit __P((int));
diff --git a/sbin/fsck_ifs/inode.c b/sbin/fsck_ifs/inode.c
index 56b978fa30dd..dcf2d89b28a4 100644
--- a/sbin/fsck_ifs/inode.c
+++ b/sbin/fsck_ifs/inode.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)inode.c	8.5 (Berkeley) 2/8/95";
+static const char sccsid[] = "@(#)inode.c	8.5 (Berkeley) 2/8/95";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -41,12 +41,16 @@ static char sccsid[] = "@(#)inode.c	8.5 (Berkeley) 2/8/95";
 #include <ufs/ufs/dir.h>
 #include <ufs/ffs/fs.h>
 #include <pwd.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include "fsck.h"
 
 static ino_t startinum;
 
+static int	iblock __P((struct inodesc *idesc, long ilevel, quad_t isize));
+
+int
 ckinode(dp, idesc)
 	struct dinode *dp;
 	register struct inodesc *idesc;
@@ -99,6 +103,7 @@ ckinode(dp, idesc)
 	return (KEEPON);
 }
 
+static int
 iblock(idesc, ilevel, isize)
 	struct inodesc *idesc;
 	long ilevel;
@@ -110,7 +115,6 @@ iblock(idesc, ilevel, isize)
 	int i, n, (*func)(), nif;
 	quad_t sizepb;
 	char buf[BUFSIZ];
-	extern int dirscan(), pass1check();
 
 	if (idesc->id_type == ADDR) {
 		func = idesc->id_func;
@@ -164,6 +168,7 @@ iblock(idesc, ilevel, isize)
  * Check that a block in a legal block number.
  * Return 0 if in range, 1 if out of range.
  */
+int
 chkrange(blk, cnt)
 	daddr_t blk;
 	int cnt;
@@ -253,6 +258,7 @@ getnextinode(inumber)
 	return (dp++);
 }
 
+void
 resetinodebuf()
 {
 
@@ -278,6 +284,7 @@ resetinodebuf()
 		(void)getnextinode(nextino);
 }
 
+void
 freeinodebuf()
 {
 
@@ -293,6 +300,7 @@ freeinodebuf()
  *
  * Enter inodes into the cache.
  */
+void
 cacheino(dp, inumber)
 	register struct dinode *dp;
 	ino_t inumber;
@@ -352,6 +360,7 @@ getinoinfo(inumber)
 /*
  * Clean up all the inode cache structure.
  */
+void
 inocleanup()
 {
 	register struct inoinfo **inpp;
@@ -365,12 +374,13 @@ inocleanup()
 	inphead = inpsort = NULL;
 }
 	
+void
 inodirty()
 {
-	
 	dirty(pbp);
 }
 
+void
 clri(idesc, type, flag)
 	register struct inodesc *idesc;
 	char *type;
@@ -395,6 +405,7 @@ clri(idesc, type, flag)
 	}
 }
 
+int
 findname(idesc)
 	struct inodesc *idesc;
 {
@@ -406,6 +417,7 @@ findname(idesc)
 	return (STOP|FOUND);
 }
 
+int
 findino(idesc)
 	struct inodesc *idesc;
 {
@@ -421,6 +433,7 @@ findino(idesc)
 	return (KEEPON);
 }
 
+void
 pinode(ino)
 	ino_t ino;
 {
@@ -446,6 +459,7 @@ pinode(ino)
 	printf("MTIME=%12.12s %4.4s ", &p[4], &p[20]);
 }
 
+void
 blkerror(ino, type, blk)
 	ino_t ino;
 	char *type;
@@ -526,11 +540,11 @@ allocino(request, type)
 /*
  * deallocate an inode
  */
+void
 freeino(ino)
 	ino_t ino;
 {
 	struct inodesc idesc;
-	extern int pass4check();
 	struct dinode *dp;
 
 	bzero((char *)&idesc, sizeof(struct inodesc));
diff --git a/sbin/fsck_ifs/main.c b/sbin/fsck_ifs/main.c
index 5ff6918a131e..1a6cd44f55d1 100644
--- a/sbin/fsck_ifs/main.c
+++ b/sbin/fsck_ifs/main.c
@@ -32,13 +32,13 @@
  */
 
 #ifndef lint
-static char copyright[] =
+static const 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	8.2 (Berkeley) 1/23/94";
+static const char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -49,22 +49,24 @@ static char sccsid[] = "@(#)main.c	8.2 (Berkeley) 1/23/94";
 #include <ufs/ffs/fs.h>
 #include <fstab.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <string.h>
 #include <ctype.h>
 #include <stdio.h>
 #include "fsck.h"
+static int	argtoi __P((int flag, char *req, char *str, int base));
+static int	docheck __P((struct fstab *fsp));
+static int	checkfilesys __P((char *filesys, char *mntpt, long auxdata,
+				  int child));
 
-void	catch(), catchquit(), voidquit();
-int	returntosingle;
-
+int
 main(argc, argv)
 	int	argc;
 	char	*argv[];
 {
 	int ch;
 	int ret, maxrun = 0;
-	extern int docheck(), checkfilesys();
-	extern char *optarg, *blockcheck();
+	extern char *optarg;
 	extern int optind;
 
 	sync();
@@ -135,6 +137,7 @@ main(argc, argv)
 	exit(ret);
 }
 
+int
 argtoi(flag, req, str, base)
 	int flag;
 	char *req, *str;
@@ -152,6 +155,7 @@ argtoi(flag, req, str, base)
 /*
  * Determine whether a filesystem should be checked.
  */
+int
 docheck(fsp)
 	register struct fstab *fsp;
 {
@@ -168,9 +172,11 @@ docheck(fsp)
  * Check the specified filesystem.
  */
 /* ARGSUSED */
+int
 checkfilesys(filesys, mntpt, auxdata, child)
 	char *filesys, *mntpt;
 	long auxdata;
+	int child;
 {
 	daddr_t n_ffree, n_bfree;
 	struct dups *dp;
@@ -255,7 +261,7 @@ checkfilesys(filesys, mntpt, auxdata, child)
 	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",
+	printf("(%ld frags, %ld blocks, %ld.%ld%% 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 &&
diff --git a/sbin/fsck_ifs/pass1.c b/sbin/fsck_ifs/pass1.c
index 7d8e507e1ce4..70ce40afce16 100644
--- a/sbin/fsck_ifs/pass1.c
+++ b/sbin/fsck_ifs/pass1.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass1.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass1.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -40,15 +40,17 @@ static char sccsid[] = "@(#)pass1.c	8.1 (Berkeley) 6/5/93";
 #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 "fsck.h"
 
 static daddr_t badblk;
 static daddr_t dupblk;
-int pass1check();
-struct dinode *getnextinode();
 
+static void	checkinode __P((ino_t inumber, struct inodesc *idesc));
+
+void
 pass1()
 {
 	ino_t inumber;
@@ -87,6 +89,7 @@ pass1()
 	freeinodebuf();
 }
 
+void
 checkinode(inumber, idesc)
 	ino_t inumber;
 	register struct inodesc *idesc;
@@ -148,7 +151,7 @@ checkinode(inumber, idesc)
 				errexit("cannot read symlink");
 			if (debug) {
 				symbuf[dp->di_size] = 0;
-				printf("convert symlink %d(%s) of size %d\n",
+				printf("convert symlink %ld(%s) of size %ld\n",
 					inumber, symbuf, (long)dp->di_size);
 			}
 			dp = ginode(inumber);
@@ -247,6 +250,7 @@ checkinode(inumber, idesc)
 	}
 }
 
+int
 pass1check(idesc)
 	register struct inodesc *idesc;
 {
diff --git a/sbin/fsck_ifs/pass1b.c b/sbin/fsck_ifs/pass1b.c
index 27b2dfd6238c..1450bd80e0a3 100644
--- a/sbin/fsck_ifs/pass1b.c
+++ b/sbin/fsck_ifs/pass1b.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass1b.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass1b.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -45,6 +45,7 @@ static char sccsid[] = "@(#)pass1b.c	8.1 (Berkeley) 6/5/93";
 int	pass1bcheck();
 static  struct dups *duphead;
 
+void
 pass1b()
 {
 	register int c, i;
@@ -72,6 +73,7 @@ pass1b()
 	}
 }
 
+int
 pass1bcheck(idesc)
 	register struct inodesc *idesc;
 {
diff --git a/sbin/fsck_ifs/pass2.c b/sbin/fsck_ifs/pass2.c
index 631475174372..82cbe0afd0f1 100644
--- a/sbin/fsck_ifs/pass2.c
+++ b/sbin/fsck_ifs/pass2.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
+static const char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -40,6 +40,7 @@ static char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
 #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 "fsck.h"
@@ -48,6 +49,7 @@ static char sccsid[] = "@(#)pass2.c	8.2 (Berkeley) 2/27/94";
 
 int	pass2check(), blksort();
 
+void
 pass2()
 {
 	register struct dinode *dp;
@@ -189,6 +191,7 @@ pass2()
 	propagate();
 }
 
+int
 pass2check(idesc)
 	struct inodesc *idesc;
 {
@@ -422,6 +425,7 @@ pass2check(idesc)
 /*
  * Routine to sort disk blocks.
  */
+int
 blksort(inpp1, inpp2)
 	struct inoinfo **inpp1, **inpp2;
 {
diff --git a/sbin/fsck_ifs/pass3.c b/sbin/fsck_ifs/pass3.c
index 5c6f09d041de..963c41a28c5c 100644
--- a/sbin/fsck_ifs/pass3.c
+++ b/sbin/fsck_ifs/pass3.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass3.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass3.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -41,6 +41,7 @@ static char sccsid[] = "@(#)pass3.c	8.1 (Berkeley) 6/5/93";
 #include <ufs/ffs/fs.h>
 #include "fsck.h"
 
+void
 pass3()
 {
 	register struct inoinfo **inpp, *inp;
diff --git a/sbin/fsck_ifs/pass4.c b/sbin/fsck_ifs/pass4.c
index 7450530e8a4e..df8f72247186 100644
--- a/sbin/fsck_ifs/pass4.c
+++ b/sbin/fsck_ifs/pass4.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -45,6 +45,7 @@ static char sccsid[] = "@(#)pass4.c	8.1 (Berkeley) 6/5/93";
 
 int	pass4check();
 
+void
 pass4()
 {
 	register ino_t inumber;
@@ -103,6 +104,7 @@ pass4()
 	}
 }
 
+int
 pass4check(idesc)
 	register struct inodesc *idesc;
 {
diff --git a/sbin/fsck_ifs/pass5.c b/sbin/fsck_ifs/pass5.c
index 7e8b2ef061b2..7972468bd251 100644
--- a/sbin/fsck_ifs/pass5.c
+++ b/sbin/fsck_ifs/pass5.c
@@ -32,19 +32,21 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pass5.c	8.2 (Berkeley) 2/2/94";
+static const char sccsid[] = "@(#)pass5.c	8.2 (Berkeley) 2/2/94";
 #endif /* not lint */
 
 #include <sys/param.h>
 #include <sys/time.h>
 #include <ufs/ufs/dinode.h>
 #include <ufs/ffs/fs.h>
+#include <stdio.h>
 #include <string.h>
 #include "fsck.h"
 
+void
 pass5()
 {
-	int c, blk, frags, basesize, sumsize, mapsize, savednrpos;
+	int c, blk, frags, basesize, sumsize, mapsize, savednrpos = 0;
 	register struct fs *fs = &sblock;
 	register struct cg *cg = &cgrp;
 	daddr_t dbase, dmax;
diff --git a/sbin/fsck_ifs/preen.c b/sbin/fsck_ifs/preen.c
index 005a65d97989..1cdb01d6e977 100644
--- a/sbin/fsck_ifs/preen.c
+++ b/sbin/fsck_ifs/preen.c
@@ -32,19 +32,20 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)preen.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)preen.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
+#include <ufs/ufs/dinode.h>
 #include <fstab.h>
 #include <string.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <stdlib.h>
 #include <ctype.h>
-
-char	*rawname(), *unrawname(), *blockcheck();
+#include "fsck.h"
 
 struct part {
 	struct	part *next;		/* forward link of partitions on disk */
@@ -60,9 +61,16 @@ struct disk {
 	int	pid;			/* If != 0, pid of proc working on */
 } *disks;
 
+static void	addpart __P((char *name, char *fsname, long auxdata));
+static int	startdisk __P((struct disk *dk, int (*checkit)()));
+static struct disk 	*finddisk __P((char *name));
+static char 	*unrawname __P((char *name));
+static char 	*rawname __P((char *name));
+
 int	nrun, ndisks;
 char	hotroot;
 
+int
 checkfstab(preen, maxrun, docheck, chkit)
 	int preen, maxrun;
 	int (*docheck)(), (*chkit)();
@@ -84,10 +92,12 @@ checkfstab(preen, maxrun, docheck, chkit)
 		while ((fsp = getfsent()) != 0) {
 			if ((auxdata = (*docheck)(fsp)) == 0)
 				continue;
-			if (preen == 0 || passno == 1 && fsp->fs_passno == 1) {
-				if (name = blockcheck(fsp->fs_spec)) {
-					if (sumstatus = (*chkit)(name,
-					    fsp->fs_file, auxdata, 0))
+			if (!preen || (passno == 1 && fsp->fs_passno == 1)) {
+				name = blockcheck(fsp->fs_spec);
+				if (name) {
+					sumstatus = (*chkit)(name,
+					    fsp->fs_file, auxdata, 0);
+					if (sumstatus)
 						return (sumstatus);
 				} else if (preen)
 					return (8);
@@ -111,7 +121,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 			maxrun = ndisks;
 		nextdisk = disks;
 		for (passno = 0; passno < maxrun; ++passno) {
-			while (ret = startdisk(nextdisk, chkit) && nrun > 0)
+			while ((ret = startdisk(nextdisk, chkit)) != 0 && 
+			    nrun > 0)
 				sleep(10);
 			if (ret)
 				return (ret);
@@ -150,8 +161,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 
 			if (nextdisk == NULL) {
 				if (dk->part) {
-					while (ret = startdisk(dk, chkit) &&
-					    nrun > 0)
+					while ((ret = startdisk(dk, chkit)) != 0
+					    && nrun > 0)
 						sleep(10);
 					if (ret)
 						return (ret);
@@ -164,8 +175,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 					    nextdisk->pid == 0)
 						break;
 				}
-				while (ret = startdisk(nextdisk, chkit) &&
-				    nrun > 0)
+				while ((ret = startdisk(nextdisk, chkit)) != 0
+				    && nrun > 0)
 					sleep(10);
 				if (ret)
 					return (ret);
@@ -192,7 +203,7 @@ finddisk(name)
 {
 	register struct disk *dk, **dkp;
 	register char *p;
-	size_t len;
+	size_t len = 0;
 
 	for (p = name + strlen(name) - 1; p >= name; --p)
 		if (isdigit(*p)) {
@@ -225,6 +236,7 @@ finddisk(name)
 	return (dk);
 }
 
+void
 addpart(name, fsname, auxdata)
 	char *name, *fsname;
 	long auxdata;
@@ -256,6 +268,7 @@ addpart(name, fsname, auxdata)
 	pt->auxdata = auxdata;
 }
 
+int
 startdisk(dk, checkit)
 	register struct disk *dk;
 	int (*checkit)();
diff --git a/sbin/fsck_ifs/setup.c b/sbin/fsck_ifs/setup.c
index fb1c1d9113ff..fe6f2ea95e4d 100644
--- a/sbin/fsck_ifs/setup.c
+++ b/sbin/fsck_ifs/setup.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
+static const char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
 #endif /* not lint */
 
 #define DKTYPENAMES
@@ -45,6 +45,7 @@ static char sccsid[] = "@(#)setup.c	8.2 (Berkeley) 2/21/94";
 #include <sys/disklabel.h>
 #include <sys/file.h>
 #include <errno.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
@@ -54,8 +55,13 @@ struct bufarea asblk;
 #define altsblock (*asblk.b_un.b_fs)
 #define POWEROF2(num)	(((num) & ((num) - 1)) == 0)
 
-struct	disklabel *getdisklabel();
+static int	readsb __P((int listerr));
+static void	badsb __P((int listerr, char *s));
+static int	calcsb __P((char *dev, int devfd, struct fs *fs));
+static struct disklabel * getdisklabel __P((char *s, int fd));
 
+
+int
 setup(dev)
 	char *dev;
 {
@@ -99,7 +105,8 @@ setup(dev)
 	asblk.b_un.b_buf = malloc(SBSIZE);
 	if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
 		errexit("cannot allocate space for superblock\n");
-	if (lp = getdisklabel((char *)NULL, fsreadfd))
+	lp = getdisklabel((char *)NULL, fsreadfd);
+	if (lp)
 		dev_bsize = secsize = lp->d_secsize;
 	else
 		dev_bsize = secsize = DEV_BSIZE;
@@ -297,6 +304,7 @@ setup(dev)
 /*
  * Read in the super block and its summary info.
  */
+static int
 readsb(listerr)
 	int listerr;
 {
@@ -380,6 +388,7 @@ readsb(listerr)
 	return (1);
 }
 
+static void
 badsb(listerr, s)
 	int listerr;
 	char *s;
@@ -398,6 +407,7 @@ badsb(listerr, s)
  * can be used. Do NOT attempt to use other macros without verifying that
  * their needed information is available!
  */
+int
 calcsb(dev, devfd, fs)
 	char *dev;
 	int devfd;
@@ -409,7 +419,7 @@ calcsb(dev, devfd, fs)
 	int i;
 
 	cp = index(dev, '\0') - 1;
-	if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) {
+	if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) {
 		pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
 		return (0);
 	}
diff --git a/sbin/fsck_ifs/utilities.c b/sbin/fsck_ifs/utilities.c
index 64a4cac19ab3..e8a872dbc21e 100644
--- a/sbin/fsck_ifs/utilities.c
+++ b/sbin/fsck_ifs/utilities.c
@@ -32,7 +32,7 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -42,12 +42,17 @@ static char sccsid[] = "@(#)utilities.c	8.1 (Berkeley) 6/5/93";
 #include <ufs/ffs/fs.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <stdarg.h>
 #include <string.h>
 #include <ctype.h>
 #include "fsck.h"
 
 long	diskreads, totalreads;	/* Disk cache statistics */
 
+static void	rwerror __P((char *mesg, daddr_t blk));
+
+int
 ftypeok(dp)
 	struct dinode *dp;
 {
@@ -69,6 +74,7 @@ ftypeok(dp)
 	}
 }
 
+int
 reply(question)
 	char *question;
 {
@@ -104,6 +110,7 @@ reply(question)
 /*
  * Malloc buffers and set up cache.
  */
+void
 bufinit()
 {
 	register struct bufarea *bp;
@@ -188,6 +195,7 @@ getblk(bp, blk, size)
 	}
 }
 
+void
 flush(fd, bp)
 	int fd;
 	register struct bufarea *bp;
@@ -213,6 +221,7 @@ flush(fd, bp)
 	}
 }
 
+void
 rwerror(mesg, blk)
 	char *mesg;
 	daddr_t blk;
@@ -225,6 +234,7 @@ rwerror(mesg, blk)
 		errexit("Program terminated\n");
 }
 
+void
 ckfini()
 {
 	register struct bufarea *bp, *nbp;
@@ -260,6 +270,7 @@ ckfini()
 	(void)close(fswritefd);
 }
 
+int
 bread(fd, buf, blk, size)
 	int fd;
 	char *buf;
@@ -298,6 +309,7 @@ bread(fd, buf, blk, size)
 	return (errs);
 }
 
+void
 bwrite(fd, buf, blk, size)
 	int fd;
 	char *buf;
@@ -334,6 +346,7 @@ bwrite(fd, buf, blk, size)
 /*
  * allocate a data block with the specified number of fragments
  */
+int
 allocblk(frags)
 	long frags;
 {
@@ -364,6 +377,7 @@ allocblk(frags)
 /*
  * Free a previously allocated block
  */
+void
 freeblk(blkno, frags)
 	daddr_t blkno;
 	long frags;
@@ -378,6 +392,7 @@ freeblk(blkno, frags)
 /*
  * Find a pathname
  */
+void
 getpathname(namebuf, curdir, ino)
 	char *namebuf;
 	ino_t curdir, ino;
@@ -386,7 +401,6 @@ getpathname(namebuf, curdir, ino)
 	register char *cp;
 	struct inodesc idesc;
 	static int busy = 0;
-	extern int findname();
 
 	if (curdir == ino && ino == ROOTINO) {
 		(void)strcpy(namebuf, "/");
@@ -435,7 +449,8 @@ getpathname(namebuf, curdir, ino)
 }
 
 void
-catch()
+catch(x)
+	int x;
 {
 	if (!doinglevel2)
 		ckfini();
@@ -448,10 +463,9 @@ catch()
  * so that reboot sequence may be interrupted.
  */
 void
-catchquit()
+catchquit(x)
+	int x;
 {
-	extern returntosingle;
-
 	printf("returning to single-user after filesystem check\n");
 	returntosingle = 1;
 	(void)signal(SIGQUIT, SIG_DFL);
@@ -462,7 +476,8 @@ catchquit()
  * Used by child processes in preen.
  */
 void
-voidquit()
+voidquit(x)
+	int x;
 {
 
 	sleep(1);
@@ -473,6 +488,7 @@ voidquit()
 /*
  * determine whether an inode should be fixed.
  */
+int
 dofix(idesc, msg)
 	register struct inodesc *idesc;
 	char *msg;
@@ -506,15 +522,19 @@ dofix(idesc, msg)
 
 	default:
 		errexit("UNKNOWN INODESC FIX MODE %d\n", idesc->id_fix);
+		return (0);
 	}
 	/* NOTREACHED */
 }
 
 /* VARARGS1 */
-errexit(s1, s2, s3, s4)
-	char *s1;
+__dead void
+errexit(const char *s1, ...)
 {
-	printf(s1, s2, s3, s4);
+	va_list ap;
+	va_start(ap,s1);
+	vfprintf(stdout, s1, ap);
+	va_end(ap);
 	exit(8);
 }
 
@@ -523,19 +543,22 @@ errexit(s1, s2, s3, s4)
  * Die if preening, otherwise just print message and continue.
  */
 /* VARARGS1 */
-pfatal(s, a1, a2, a3)
-	char *s;
+void
+pfatal(const char *s, ...)
 {
 
+	va_list ap;
+	va_start(ap,s);
 	if (preen) {
 		printf("%s: ", cdevname);
-		printf(s, a1, a2, a3);
+		vfprintf(stdout, s, ap);
 		printf("\n");
 		printf("%s: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.\n",
 			cdevname);
 		exit(8);
 	}
-	printf(s, a1, a2, a3);
+	vfprintf(stdout, s, ap);
+	va_end(ap);
 }
 
 /*
@@ -543,24 +566,31 @@ pfatal(s, a1, a2, a3)
  * or a warning (preceded by filename) when preening.
  */
 /* VARARGS1 */
-pwarn(s, a1, a2, a3, a4, a5, a6)
-	char *s;
+void
+pwarn(const char *s, ...)
 {
-
+	va_list ap;
+	va_start(ap,s);
 	if (preen)
 		printf("%s: ", cdevname);
-	printf(s, a1, a2, a3, a4, a5, a6);
+	vfprintf(stdout, s, ap);
+	va_end(ap);
 }
 
 #ifndef lint
 /*
  * Stub for routines from kernel.
  */
-panic(s)
-	char *s;
+__dead void
+#ifdef __STDC__
+panic(const char *fmt, ...)
+#else
+panic(fmt, va_alist)
+	char *fmt;
+#endif
 {
 
 	pfatal("INTERNAL INCONSISTENCY:");
-	errexit(s);
+	errexit(fmt);
 }
 #endif
diff --git a/sbin/quotacheck/preen.c b/sbin/quotacheck/preen.c
index 005a65d97989..1cdb01d6e977 100644
--- a/sbin/quotacheck/preen.c
+++ b/sbin/quotacheck/preen.c
@@ -32,19 +32,20 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)preen.c	8.1 (Berkeley) 6/5/93";
+static const char sccsid[] = "@(#)preen.c	8.1 (Berkeley) 6/5/93";
 #endif /* not lint */
 
 #include <sys/param.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
+#include <ufs/ufs/dinode.h>
 #include <fstab.h>
 #include <string.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <stdlib.h>
 #include <ctype.h>
-
-char	*rawname(), *unrawname(), *blockcheck();
+#include "fsck.h"
 
 struct part {
 	struct	part *next;		/* forward link of partitions on disk */
@@ -60,9 +61,16 @@ struct disk {
 	int	pid;			/* If != 0, pid of proc working on */
 } *disks;
 
+static void	addpart __P((char *name, char *fsname, long auxdata));
+static int	startdisk __P((struct disk *dk, int (*checkit)()));
+static struct disk 	*finddisk __P((char *name));
+static char 	*unrawname __P((char *name));
+static char 	*rawname __P((char *name));
+
 int	nrun, ndisks;
 char	hotroot;
 
+int
 checkfstab(preen, maxrun, docheck, chkit)
 	int preen, maxrun;
 	int (*docheck)(), (*chkit)();
@@ -84,10 +92,12 @@ checkfstab(preen, maxrun, docheck, chkit)
 		while ((fsp = getfsent()) != 0) {
 			if ((auxdata = (*docheck)(fsp)) == 0)
 				continue;
-			if (preen == 0 || passno == 1 && fsp->fs_passno == 1) {
-				if (name = blockcheck(fsp->fs_spec)) {
-					if (sumstatus = (*chkit)(name,
-					    fsp->fs_file, auxdata, 0))
+			if (!preen || (passno == 1 && fsp->fs_passno == 1)) {
+				name = blockcheck(fsp->fs_spec);
+				if (name) {
+					sumstatus = (*chkit)(name,
+					    fsp->fs_file, auxdata, 0);
+					if (sumstatus)
 						return (sumstatus);
 				} else if (preen)
 					return (8);
@@ -111,7 +121,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 			maxrun = ndisks;
 		nextdisk = disks;
 		for (passno = 0; passno < maxrun; ++passno) {
-			while (ret = startdisk(nextdisk, chkit) && nrun > 0)
+			while ((ret = startdisk(nextdisk, chkit)) != 0 && 
+			    nrun > 0)
 				sleep(10);
 			if (ret)
 				return (ret);
@@ -150,8 +161,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 
 			if (nextdisk == NULL) {
 				if (dk->part) {
-					while (ret = startdisk(dk, chkit) &&
-					    nrun > 0)
+					while ((ret = startdisk(dk, chkit)) != 0
+					    && nrun > 0)
 						sleep(10);
 					if (ret)
 						return (ret);
@@ -164,8 +175,8 @@ checkfstab(preen, maxrun, docheck, chkit)
 					    nextdisk->pid == 0)
 						break;
 				}
-				while (ret = startdisk(nextdisk, chkit) &&
-				    nrun > 0)
+				while ((ret = startdisk(nextdisk, chkit)) != 0
+				    && nrun > 0)
 					sleep(10);
 				if (ret)
 					return (ret);
@@ -192,7 +203,7 @@ finddisk(name)
 {
 	register struct disk *dk, **dkp;
 	register char *p;
-	size_t len;
+	size_t len = 0;
 
 	for (p = name + strlen(name) - 1; p >= name; --p)
 		if (isdigit(*p)) {
@@ -225,6 +236,7 @@ finddisk(name)
 	return (dk);
 }
 
+void
 addpart(name, fsname, auxdata)
 	char *name, *fsname;
 	long auxdata;
@@ -256,6 +268,7 @@ addpart(name, fsname, auxdata)
 	pt->auxdata = auxdata;
 }
 
+int
 startdisk(dk, checkit)
 	register struct disk *dk;
 	int (*checkit)();