Change getsn() to use size_t for size values.

The size argument and the return value both describe the size of a
memory area, thus size_t is justified.

ok pedro@

share/man/man9/kern.9

@@ -239,8 +239,8 @@ and
 .Xr strncasecmp 3 .
 .Sh MISCELLANEOUS
 .nr nS 1
-.Ft int
-.Fn getsn "char *cp" "int size"
+.Ft size_t
+.Fn getsn "char *cp" "size_t size"
 .nr nS 0
 .Pp
 The

sys/kern/subr_userconf.c

@@ -421,14 +421,13 @@ userconf_modify(char *item, int *val)
 	int ok = 0;
 	int a;
 	char *c;
-	int i;
 
 	while (!ok) {
 		printf("%s [", item);
 		userconf_pnum(*val);
 		printf("] ? ");
 
-		i = getsn(userconf_argbuf, sizeof(userconf_argbuf));
+		(void)getsn(userconf_argbuf, sizeof(userconf_argbuf));
 
 		c = userconf_argbuf;
 		while (*c == ' ' || *c == '\t' || *c == '\n') c++;
@@ -994,14 +993,13 @@ userconf_add_read(char *prompt, char field, char *dev, int len, int *val)
 	int ok = 0;
 	int a;
 	char *c;
-	int i;
 
 	*val = -1;
 
 	while (!ok) {
 		printf("%s ? ", prompt);
 
-		i = getsn(userconf_argbuf, sizeof(userconf_argbuf));
+		(void)getsn(userconf_argbuf, sizeof(userconf_argbuf));
 
 		c = userconf_argbuf;
 		while (*c == ' ' || *c == '\t' || *c == '\n')

sys/lib/libkern/getsn.c

@@ -29,10 +29,11 @@
 #include <sys/systm.h>
 #include <dev/cons.h>
 
-int
-getsn(char *cp, int size)
+size_t
+getsn(char *cp, size_t size)
 {
-	int len = 0, c;
+	size_t len = 0;
+	int c;
 	char *lp = cp;
 
 	while (1) {

sys/lib/libkern/libkern.h

@@ -176,7 +176,7 @@ size_t	 strlcat(char *, const char *, size_t)
 int	 strcmp(const char *, const char *);
 int	 strncmp(const char *, const char *, size_t);
 int	 strncasecmp(const char *, const char *, size_t);
-int	 getsn(char *, int);
+size_t	 getsn(char *, size_t);
 char	*strchr(const char *, int);
 char	*strrchr(const char *, int);
 int	 timingsafe_bcmp(const void *, const void *, size_t);