From: Emden Gansner <erg@research.att.com>
Date: Thu, 3 Jan 2013 20:42:42 +0000 (-0500)
Subject: Turn off call to isatty() in flex output. The cgraph readers never use
X-Git-Tag: LAST_LIBGRAPH~32^2~260
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=40a5a33ac76e4d3d22662fd51e7c0e1d2be3100b;p=graphviz

Turn off call to isatty() in flex output. The cgraph readers never use
this result, and the Windows version of isatty() crashes if the file descriptor
is not a valid open file.
---

diff --git a/lib/cgraph/scan.l b/lib/cgraph/scan.l
index 75d377d8b..e2215d1f4 100644
--- a/lib/cgraph/scan.l
+++ b/lib/cgraph/scan.l
@@ -39,6 +39,7 @@ void agsetfile(char* f) { InputFile = f; line_num = 1; }
  */
 void aglexinit(Agdisc_t *disc, void *ifile) { Disc = disc; Ifile = ifile; graphType = 0;}
 
+#define isatty(x) 0
 #ifndef YY_INPUT
 #define YY_INPUT(buf,result,max_size) \
 	if ((result = Disc->io->afread(Ifile, buf, max_size)) < 0) \