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Revision 1.1, Wed Feb 6 21:11:46 2019 UTC (5 years, 3 months ago) by schwarze
Branch: MAIN
CVS Tags: VERSION_1_14_6, VERSION_1_14_5, HEAD

Let roff_getname() end the roff identifier at a tab character
and audit all its callers whether termination is handled correctly.

Resulting improvements:
* An escape or tab ending the macro name in a macro invocation
is discarded, and argument processing is started after it.
* An escape or tab ending a name in ".if d" and ".if r" is preserved.
* An escape ending a name in ".ds" causes the whole request to be ignored.
* A tab ending a name in ".ds" becomes part of the string.
* An escape or tab ending a name in ".rm"
causes the rest of the line to be ignored.
* An escape or tab ending the first name in ".als", ".rn", or ".nr"
causes the whole request to be ignored.

Kurt Jaeger <pi at FreeBSD> made me aware of
  https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235456#c0
and in that bug report, comment 0 item (3) is a special case
of this class of issues.

Yes, the "mh" manual pages are no doubt among the worst on the planet.

.\" $OpenBSD: tab.in,v 1.1 2019/02/06 20:54:28 schwarze Exp $
.Dd $Mdocdate: February 6 2019 $
.Dt DE-TAB 1
.Os
.Sh NAME
.Nm de-tab
.Nd tab characters in macro definition lines
.Sh DESCRIPTION
.de test1	ignored
testval \\$1;\\$2
..
no argument:
.test1
.br
argument after_tab:
.test1	after_tab
.br
argument after_tab_and_space:
.test1	 after_tab_and_space
.br
argument after_two_tabs:
.test1		after_two_tabs
.br
argument after_tab_tab_space:
.test1		 after_tab_tab_space
.Ss End marker
.de test2 endm	ignored
testval \\$1;\\$2
.endm
no argument:
.test2
.br
argument after_tab:
.test2	after_tab
.Ss Removal
.rm test1	test2
macro test1 is gone:
.test1
.br
macro test2 still exists:
.test2