[src/trunk]: src/usr.bin/tail PR/50322: Timo Buhrmester: tail -F <file> misbe...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7416f4ff02be
branches:  trunk
changeset: 340901:7416f4ff02be
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Oct 09 17:51:26 2015 +0000

description:
PR/50322: Timo Buhrmester: tail -F <file> misbehaves with stdin closed
Compare fp with stdin not fileno(fp) with STDIN_FILENO, because if tail
is called with 0 closed, then we are not going to be setting event filters
for the file because we'll erroneously think it is stdin.

diffstat:

 usr.bin/tail/forward.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (36 lines):

diff -r 2098cb3cfff1 -r 7416f4ff02be usr.bin/tail/forward.c
--- a/usr.bin/tail/forward.c    Fri Oct 09 17:22:44 2015 +0000
+++ b/usr.bin/tail/forward.c    Fri Oct 09 17:51:26 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: forward.c,v 1.32 2013/10/18 20:47:07 christos Exp $    */
+/*     $NetBSD: forward.c,v 1.33 2015/10/09 17:51:26 christos Exp $    */
 
 /*-
  * Copyright (c) 1991, 1993
@@ -37,7 +37,7 @@
 #if 0
 static char sccsid[] = "@(#)forward.c  8.1 (Berkeley) 6/6/93";
 #endif
-__RCSID("$NetBSD: forward.c,v 1.32 2013/10/18 20:47:07 christos Exp $");
+__RCSID("$NetBSD: forward.c,v 1.33 2015/10/09 17:51:26 christos Exp $");
 #endif /* not lint */
 
 #include <sys/types.h>
@@ -198,7 +198,7 @@
                        n = 0;
 
                        memset(ev, 0, sizeof(ev));
-                       if (fflag == 2 && fileno(fp) != STDIN_FILENO) {
+                       if (fflag == 2 && fp != stdin) {
                                EV_SET(&ev[n], fileno(fp), EVFILT_VNODE,
                                    EV_ADD | EV_ENABLE | EV_CLEAR,
                                    NOTE_DELETE | NOTE_RENAME, 0, 0);
@@ -240,7 +240,7 @@
                         */
                        (void) sleep(1);
 
-                       if (fflag == 2 && fileno(fp) != STDIN_FILENO &&
+                       if (fflag == 2 && fp != stdin &&
                            stat(fname, &statbuf) != -1) {
                                if (statbuf.st_ino != sbp->st_ino ||
                                    statbuf.st_dev != sbp->st_dev ||