bin/55660: col(1): no output if input does not have newlines

[rajeev_v_pillai%yahoo.com@localhost]

>Number:         55660
>Category:       bin
>Synopsis:       col(1): no output if input does not have newlines
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 14 21:15:00 +0000 2020
>Originator:     Rajeev Pillai
>Release:        9.0_STABLE
>Organization:
>Environment:
NetBSD x202e.localdomain 9.0_STABLE NetBSD 9.0_STABLE (GENERIC) #0: Fri Sep  4 18:54:33 UTC 2020  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
If the input supplied to col(1) does not have any newline characters,
then col(1) displays no output:

$ printf 'hello\vworld' | col
$ printf 'hello\rworld\r1\r2\r3\r4' | col

>How-To-Repeat:
See above.
>Fix:
diff -urN a/col.c b/col.c
--- a/col.c	2014-10-18 14:56:14.000000000 +0000
+++ b/col.c	2020-09-14 14:34:10.721099425 +0000
@@ -300,8 +300,6 @@
 			l->l_max_col = cur_col;
 		cur_col++;
 	}
-	if (max_line == 0)
-		exit(EXIT_SUCCESS);	/* no lines, so just exit */
 
 	/* goto the last line that had a character on it */
 	for (; l->l_next; l = l->l_next)