Partially back out previous fix (in cases ':' and '!'),

leave case '.' as valid user name, not host reference.
Document new behaviour.

1 files changed, 9 insertions, 3 deletions

diff --git a/usr.bin/talk/get_names.c b/usr.bin/talk/get_names.c
index bde908ac2d32..0d1fcf1c32b4 100644
--- a/usr.bin/talk/get_names.c
+++ b/usr.bin/talk/get_names.c
@@ -79,17 +79,23 @@ get_names(argc, argv)
 	gethostname(hostname, sizeof (hostname));
 	my_machine_name = hostname;
 	/* check for, and strip out, the machine name of the target */
-	for (cp = argv[1]; *cp && *cp != '@'; cp++)
+	for (cp = argv[1]; *cp && !index("@:!", *cp); cp++)
 		;
 	if (*cp == '\0') {
 		/* this is a local to local talk */
 		his_name = argv[1];
 		his_machine_name = my_machine_name;
 	} else {
+		if (*cp++ == '@') {
 			/* user@host */
 			his_name = argv[1];
-		his_machine_name = cp + 1;
-		*cp = '\0';
+			his_machine_name = cp;
+		} else {
+			/* host!user or host:user */
+			his_name = cp;
+			his_machine_name = argv[1];
+		}
+		*--cp = '\0';
 	}
 	if (argc > 2)
 		his_tty = argv[2];	/* tty name is arg 2 */