+//usage:#define chpasswd_trivial_usage
+//usage: IF_LONG_OPTS("[--md5|--encrypted]") IF_NOT_LONG_OPTS("[-m|-e]")
+//usage:#define chpasswd_full_usage "\n\n"
+//usage: "Read user:password from stdin and update /etc/passwd\n"
+//usage: IF_LONG_OPTS(
+//usage: "\n -e,--encrypted Supplied passwords are in encrypted form"
+//usage: "\n -m,--md5 Use MD5 encryption instead of DES"
+//usage: )
+//usage: IF_NOT_LONG_OPTS(
+//usage: "\n -e Supplied passwords are in encrypted form"
+//usage: "\n -m Use MD5 encryption instead of DES"
+//usage: )
+
+//TODO: implement -c ALGO