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-rw-r--r--libio/ioungetc.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/libio/ioungetc.c b/libio/ioungetc.c
index 1a6988e..c1237b5 100644
--- a/libio/ioungetc.c
+++ b/libio/ioungetc.c
@@ -1,5 +1,5 @@
/*
-Copyright (C) 1993 Free Software Foundation
+Copyright (C) 1993, 1996 Free Software Foundation, Inc.
This file is part of the GNU IO Library. This library is free
software; you can redistribute it and/or modify it under the
@@ -29,10 +29,14 @@ _IO_ungetc (c, fp)
int c;
_IO_FILE *fp;
{
+ int result;
CHECK_FILE (fp, EOF);
if (c == EOF)
return EOF;
- return _IO_sputbackc (fp, (unsigned char) c);
+ _IO_flockfile (fp);
+ result = _IO_sputbackc (fp, (unsigned char) c);
+ _IO_funlockfile (fp);
+ return result;
}
weak_alias (_IO_ungetc, ungetc)