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git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/common/freopen.c

@@ -0,0 +1,38 @@
+/*
+ * freopen.c
+ *
+ * Ullrich von Bassewitz, 17.06.1998
+ */
+
+
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "_file.h"
+
+
+
+FILE* freopen (char* name, char* mode, FILE* f)
+{
+    /* Check if the file is open, if so, close it */
+    if ((f->f_flags & _FOPEN) == 0) {
+	/* File is not open */
+	_errno = EINVAL;		/* File not input */
+	return 0;
+    }
+
+    /* Close the file. Don't bother setting the flag, it will get
+     * overwritten by _fopen.
+     */
+    if (close (f->f_fd) < 0) {
+	/* An error occured, _oserror is set */
+	return 0;
+    }
+
+    /* Open the file and return the descriptor */
+    return _fopen (name, mode, f);
+}
+
+
+