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col: fixing 25 year old bug

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Makes col(1) respect POSIX again for escape sequences as decribed in its manpage
The bug was introduced in CSRG in 1990
This also reverts r280911

Differential Revision:	https://reviews.freebsd.org/D2424
Reviewed by:	jhb
MFC after:	2 weeks
This commit is contained in:
Baptiste Daroussin 2015-05-01 17:18:07 +00:00
parent 041392bc29
commit f6240da93c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=282305
1 changed files with 4 additions and 4 deletions
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8
usr.bin/col/col.c
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@ -63,9 +63,9 @@ __FBSDID("$FreeBSD$");
#define SI '\017' /* shift in to normal character set */
#define SO '\016' /* shift out to alternate character set */
#define VT '\013' /* vertical tab (aka reverse line feed) */
#define RLF '\007' /* ESC-07 reverse line feed */
#define RHLF '\010' /* ESC-010 reverse half-line feed */
#define FHLF '\011' /* ESC-011 forward half-line feed */
#define RLF '7' /* ESC-7 reverse line feed */
#define RHLF '8' /* ESC-8 reverse half-line feed */
#define FHLF '9' /* ESC-9 forward half-line feed */
/* build up at least this many lines before flushing them out */
#define BUFFER_MARGIN 32
@ -378,7 +378,7 @@ flush_blanks(void)
PUTC('\n');
if (half) {
PUTC('\033');
PUTC('\011');
PUTC('9');
if (!nb)
PUTC('\r');
}