Fix overflow issue on 32 bit binaries.

Timespec is a 62 bit number, it does not fit in the 32 bits of
a long.  Use 'long long' instead.  'long long' is always at least
64 bits long and is the same as a native int when compiled as 64 bit.

Note that many 64 bit OS still run 32 bit binaries, and many small
devices like RasPi's are 32 bit.

1 files changed, 1 insertions, 1 deletions

diff --git a/ntpshmmon.c b/ntpshmmon.c
index a212fe82..56f90aa6 100644
--- a/ntpshmmon.c
+++ b/ntpshmmon.c
@@ -19,7 +19,7 @@
 /* difference between timespecs in nanoseconds */
 /* int is too small, 32 bit long is too small, avoid floats  */
 /* MUST be long long to maintain precision on 32 bit code */
-#define timespec_diff_ns(x, y)	(long long)(((x).tv_sec-(y).tv_sec)*1000000000+(x).tv_nsec-(y).tv_nsec)
+#define timespec_diff_ns(x, y)	(long long)(((x).tv_sec-(y).tv_sec)*1000000000LL+(x).tv_nsec-(y).tv_nsec)
 
 static struct shmTime *segments[NTPSEGMENTS + 1];
 static struct timespec tick[NTPSEGMENTS + 1];