From 0dba6b6f195aceafd1afefc2c2515ce0d8c707ad Mon Sep 17 00:00:00 2001
From: G.raud Meyer
Date: Thu, 5 Apr 2018 11:50:07 +0200
Subject: rename: test availability of __fpurge() and fpurge()

---
 configure.ac        |  2 ++
 misc-utils/rename.c | 10 +++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 3ad35abec..2a8d4e490 100644
--- a/configure.ac
+++ b/configure.ac
@@ -449,6 +449,8 @@ AC_CHECK_DECL([SO_PASSCRED],
                #include <sys/socket.h>])
 
 AC_CHECK_FUNCS([ \
+	__fpurge \
+	fpurge \
 	__fpending \
 	secure_getenv \
 	__secure_getenv \
diff --git a/misc-utils/rename.c b/misc-utils/rename.c
index c9add7780..2bbf7589a 100644
--- a/misc-utils/rename.c
+++ b/misc-utils/rename.c
@@ -14,7 +14,13 @@ for i in $@; do N=`echo "$i" | sed "s/$FROM/$TO/g"`; mv "$i" "$N"; done
  * in cases involving special characters. Here a C version.
  */
 #include <stdio.h>
-#include <stdio_ext.h>
+#ifdef HAVE_STDIO_EXT_H
+#	include <stdio_ext.h>
+#endif
+#ifdef HAVE_FPURGE
+#	define HAVE___FPURGE 1
+#	define __fpurge fpurge
+#endif
 #include <string.h>
 #include <stdlib.h>
 #include <errno.h>
@@ -73,12 +79,14 @@ static int ask(char *name)
 	else {
 		buf[0] = c;
 		if (c != '\n' && tty_cbreak) {
+#ifdef HAVE___FPURGE
 			/* Possibly purge a multi-byte character; or do a
 			   required purge of the rest of the line (including
 			   the newline) if the tty has been put back in
 			   canonical mode (for example by a shell after a
 			   SIGTSTP signal). */
 			__fpurge(stdin);
+#endif
 			printf("\n");
 		}
 		else if (c != '\n')
-- 
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