From: Michael van Elst <mlelstv@NetBSD.org>
Date: Fri, 8 Jan 2016 20:07:57 +0000 (-0500)
Subject: Improved pipe-stdin hack behavior; resolves sf#198.
X-Git-Tag: v2.6.1~49
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=958ccda44e46a07053a2af0709c7149de0d7250a;p=flex

Improved pipe-stdin hack behavior; resolves sf#198.

Signed-off-by: Thomas <Klausner wiz@NetBSD.org>
---

diff --git a/src/filter.c b/src/filter.c
index aebc2fc..c58406d 100644
--- a/src/filter.c
+++ b/src/filter.c
@@ -167,6 +167,8 @@ clearerr(stdin);
 			flexfatal (_("dup2(pipes[0],0)"));
 		close (pipes[0]);
         fseek (stdin, 0, SEEK_CUR);
+        ungetc(' ', stdin); /* still an evil hack, but one that works better */
+        (void)fgetc(stdin); /* on NetBSD than the fseek attempt does */
 
 		/* run as a filter, either internally or by exec */
 		if (chain->filter_func) {