From 4cbf380ce948ca15a965a78f0c1a092cf5956792 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Tue, 25 Feb 2014 14:56:10 +0100 Subject: misc/sys/select.h (__FD_MASK): Avoid signed integer overflow. Shifting into the sign position is currently supported as a GCC extension, but explicitly subjected to future changes. Computation in the unsigned type followed by a cast to the signed type is a GCC extension that will be available forever. --- misc/sys/select.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'misc') diff --git a/misc/sys/select.h b/misc/sys/select.h index fd13bab41a..941588d9c4 100644 --- a/misc/sys/select.h +++ b/misc/sys/select.h @@ -58,7 +58,7 @@ typedef long int __fd_mask; /* It's easier to assume 8-bit bytes than to get CHAR_BIT. */ #define __NFDBITS (8 * (int) sizeof (__fd_mask)) #define __FD_ELT(d) ((d) / __NFDBITS) -#define __FD_MASK(d) ((__fd_mask) 1 << ((d) % __NFDBITS)) +#define __FD_MASK(d) ((__fd_mask) (1UL << ((d) % __NFDBITS))) /* fd_set for select and pselect. */ typedef struct -- cgit 1.4.1