zeur here.
The following {,ab}use of tail(1):
% </var/log/messages tail -f
causes an abort trap 'cause of a missing "rpath" pledge. An excellent
demonstration of pledge(2)'s usefulness, since it exposed a little bug
that caused tail to try and re-open stdin, which is useless on
OpenBSD[0] (unless we parse stdin as "/dev/stdin" and its ino would
change -- unlikely).
The below patch fixes this by simply not trying to re-open stdin.
--zeurkous.
[0] NetBSD, iirc, keeps track of the original path of opened files
(other systems might too), but I suppose that's irrelevant here :)
Index: src/usr.bin/tail/forward.c
===================================================================
RCS file: /cvs/src/usr.bin/tail/forward.c,v
retrieving revision 1.31
diff -u -p -r1.31 forward.c
--- src/usr.bin/tail/forward.c 5 Jul 2016 05:06:27 -0000 1.31
+++ src/usr.bin/tail/forward.c 29 Dec 2018 05:42:07 -0000
@@ -221,7 +221,7 @@ forward(struct tailfile *tf, int nfiles,
* a new file reappears with
* the same name.
*/
- (void) tfreopen(ctf);
+ if(!is_stdin) (void)tfreopen(ctf);
} else if (ke.fflags & NOTE_TRUNCATE) {
warnx("%s has been truncated, "
"resetting.", ctf->fname);
