mescc: Add another fopen test.

* scaffold/tests/98-fopen.c: New file.
* build-aux/check-mescc.sh (tests): Add it.
* AUTHORS: Mention it.

AUTHORS

@@ -4,6 +4,7 @@ All files except the imported files listed below
 
 Jeremiah Orians <jeremiah@pdp10.guru>
 lib/libc.c (fopen)
+scaffold/tests/98-fopen.c
 
 Han-Wen Nienhuys <hanwen@xs4all.nl>
 lib/libc+tcc.c (_memmem, memmem)

build-aux/check-mescc.sh

@@ -142,6 +142,7 @@ t
 95-signal
 96-strto
 97-fopen
+98-fopen
 "
 
 # 90: needs GNU, fails for mescc, passes for tcc

scaffold/tests/98-fopen.c

@@ -0,0 +1,50 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * Mes --- Maxwell Equations of Software
+ * Copyright © 2018 Jeremiah Orians <jeremiah@pdp10.guru>
+ *
+ * This file is part of Mes.
+ *
+ * Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libmes.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+int main()
+{
+	FILE* test = fopen("tmp", "a+");
+	FILE* hold = fopen("tmp", "r");
+	int a;
+	int b;
+	int i = 1000;
+	do
+	{
+		a = fgetc(test);
+		b = fgetc(hold);
+		fprintf(stdout, "%c == %c\n", a, b);
+		if(i < 1000)
+		{
+			fflush(test);
+			fputc('a', test);
+		}
+		if(b == EOF) exit(EXIT_SUCCESS);
+		i = i + 1;
+	}while (a == b);
+	fprintf(stderr, "OOOPS you were not supposed to get here\n");
+	exit(EXIT_FAILURE);
+}