Fixed obscure bug in setvbuf

diff --git a/lang/cem/libcc.ansi/stdio/setvbuf.c b/lang/cem/libcc.ansi/stdio/setvbuf.c
index 3e6366b..c6dd3dc 100644 (file)
--- a/lang/cem/libcc.ansi/stdio/setvbuf.c
+++ b/lang/cem/libcc.ansi/stdio/setvbuf.c
@@ -23,8 +23,9 @@ setvbuf(register FILE *stream, char *buf, int mode, size_t size)
 
        stream->_flags &= ~(_IOMYBUF | _IONBF | _IOLBF);
 
+       if (buf && size <= 0) retval = EOF;
        if (!buf && (mode != _IONBF)) {
-               if ((buf = (char *) malloc(size)) == NULL) {
+               if (size <= 0 || (buf = (char *) malloc(size)) == NULL) {
                        retval = EOF;
                } else {
                        stream->_flags |= _IOMYBUF;