Constify, add some prototypes, and set WARNS=2.

Submitted by:	Mike Barcroft <mike@q9media.com>

5 files changed, 14 insertions, 8 deletions

diff --git a/usr.sbin/zic/private.h b/usr.sbin/zic/private.h
index 585d6e6..4eb54a3 100644
--- a/usr.sbin/zic/private.h
+++ b/usr.sbin/zic/private.h
@@ -99,7 +99,7 @@ char *	imalloc P((int n));
 void *	irealloc P((void * pointer, int size));
 void	icfree P((char * pointer));
 void	ifree P((char * pointer));
-char *	scheck P((const char *string, const char *format));
+const char * scheck P((const char *string, const char *format));
 
 /*
 ** Finally, some convenience items.
diff --git a/usr.sbin/zic/scheck.c b/usr.sbin/zic/scheck.c
index 692bf1a..028d009 100644
--- a/usr.sbin/zic/scheck.c
+++ b/usr.sbin/zic/scheck.c
@@ -13,7 +13,7 @@ static const char rcsid[] =
 
 #include "private.h"
 
-char *
+const char *
 scheck(string, format)
 const char * const	string;
 const char * const	format;
@@ -22,7 +22,7 @@ const char * const	format;
 	register const char *	fp;
 	register char *		tp;
 	register int		c;
-	register char *		result;
+	register const char *	result;
 	char			dummy;
 	static char		nada;
 
@@ -58,7 +58,7 @@ const char * const	format;
 	*tp++ = 'c';
 	*tp = '\0';
 	if (sscanf(string, fbuf, &dummy) != 1)
-		result = (char *) format;
+		result = format;
 	ifree(fbuf);
 	return result;
 }
diff --git a/usr.sbin/zic/zdump/Makefile b/usr.sbin/zic/zdump/Makefile
index 2088d18..49bd6a0 100644
--- a/usr.sbin/zic/zdump/Makefile
+++ b/usr.sbin/zic/zdump/Makefile
@@ -3,6 +3,7 @@
 .PATH:	${.CURDIR}/..
 
 PROG=	zdump
+WARNS?=	2
 
 SRCS=	zdump.c ialloc.c scheck.c
 MAN=	${.CURDIR}/../zdump.8
diff --git a/usr.sbin/zic/zic.c b/usr.sbin/zic/zic.c
index 109b978..1d50a7f 100644
--- a/usr.sbin/zic/zic.c
+++ b/usr.sbin/zic/zic.c
@@ -89,6 +89,7 @@ static int	addtype P((long gmtoff, const char * abbr, int isdst,
 static void	leapadd P((time_t t, int positive, int rolling, int count));
 static void	adjleap P((void));
 static void	associate P((void));
+static int	atcomp P((const void * avp, const void * bvp));
 static int	ciequal P((const char * ap, const char * bp));
 static void	convert P((long val, char * buf));
 static void	dolink P((const char * fromfile, const char * tofile));
@@ -129,6 +130,7 @@ static void	setgroup P((gid_t *flag, const char *name));
 static void	setuser P((uid_t *flag, const char *name));
 static time_t	tadd P((time_t t1, long t2));
 static void	usage P((void));
+static void	warning P((const char * const string));
 static void	writezone P((const char * name));
 static int	yearistype P((int year, const char * type));
 
@@ -1360,12 +1362,14 @@ FILE * const	fp;
 
 static int
 atcomp(avp, bvp)
-void *	avp;
-void *	bvp;
+const void *	avp;
+const void *	bvp;
 {
-	if (((struct attype *) avp)->at < ((struct attype *) bvp)->at)
+	if (((const struct attype *) avp)->at <
+	    ((const struct attype *) bvp)->at)
 		return -1;
-	else if (((struct attype *) avp)->at > ((struct attype *) bvp)->at)
+	else if (((const struct attype *) avp)->at >
+	    ((const struct attype *) bvp)->at)
 		return 1;
 	else	return 0;
 }
diff --git a/usr.sbin/zic/zic/Makefile b/usr.sbin/zic/zic/Makefile
index 5980252..97db63e 100644
--- a/usr.sbin/zic/zic/Makefile
+++ b/usr.sbin/zic/zic/Makefile
@@ -3,6 +3,7 @@
 .PATH:	${.CURDIR}/..
 
 PROG=	zic
+WARNS?=	2
 
 SRCS=	zic.c ialloc.c scheck.c
 MAN=	${.CURDIR}/../zic.8