diff --git a/misc.c b/misc.c
index db9c2e4..620121f 100644
--- a/misc.c
+++ b/misc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: misc.c,v 1.11 2001/06/16 08:58:34 markus Exp $	*/
+/*	$OpenBSD: misc.c,v 1.12 2001/06/26 17:27:24 markus Exp $	*/
 
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
@@ -25,12 +25,13 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: misc.c,v 1.11 2001/06/16 08:58:34 markus Exp $");
+RCSID("$OpenBSD: misc.c,v 1.12 2001/06/26 17:27:24 markus Exp $");
 
 #include "misc.h"
 #include "log.h"
 #include "xmalloc.h"
 
+/* remove newline at end of string */
 char *
 chop(char *s)
 {
@@ -46,6 +47,7 @@
 
 }
 
+/* set/unset filedescriptor to non-blocking */
 void
 set_nonblock(int fd)
 {
@@ -93,6 +95,7 @@
 /* Characters considered whitespace in strsep calls. */
 #define WHITESPACE " \t\r\n"
 
+/* return next token in configuration line */
 char *
 strdelim(char **s)
 {
@@ -145,7 +148,13 @@
 	return copy;
 }
 
-int a2port(const char *s)
+/*
+ * Convert ASCII string to TCP/IP port number.
+ * Port must be >0 and <=65535.
+ * Return 0 if invalid.
+ */
+int
+a2port(const char *s)
 {
 	long port;
 	char *endp;
@@ -166,7 +175,29 @@
 #define DAYS		(HOURS * 24)
 #define WEEKS		(DAYS * 7)
 
-long convtime(const char *s)
+/*
+ * Convert a time string into seconds; format is
+ * a sequence of:
+ *      time[qualifier]
+ *
+ * Valid time qualifiers are:
+ *      <none>  seconds
+ *      s|S     seconds
+ *      m|M     minutes
+ *      h|H     hours
+ *      d|D     days
+ *      w|W     weeks
+ *
+ * Examples:
+ *      90m     90 minutes
+ *      1h30m   90 minutes
+ *      2d      2 days
+ *      1w      1 week
+ *
+ * Return -1 if time string is invalid.
+ */
+long
+convtime(const char *s)
 {
 	long total, secs;
 	const char *p;
@@ -253,6 +284,7 @@
 	return (0);
 }
 
+/* function to assist building execv() arguments */
 void
 addargs(arglist *args, char *fmt, ...)
 {