tFix overflow in old Linux file size. - plan9port - [fork] Plan 9 from user space
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       ---
 (DIR) commit a3e9d8935f71d308cc879e35cc7f8223996c61ca
 (DIR) parent a32765e337d2657f09630ebf7bd71d9623269546
 (HTM) Author: rsc <devnull@localhost>
       Date:   Wed, 10 Aug 2005 17:16:38 +0000
       
       Fix overflow in old Linux file size.
       
       Diffstat:
         M src/lib9/_p9dir.c                   |       4 +++-
       
       1 file changed, 3 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/src/lib9/_p9dir.c b/src/lib9/_p9dir.c
       t@@ -47,6 +47,8 @@ isdisk(struct stat *st)
        #include <linux/hdreg.h>
        #include <linux/fs.h>
        #include <sys/ioctl.h>
       +#undef major
       +#define major(dev) ((int)(((dev) >> 8) & 0xff))
        static vlong
        disksize(int fd, int dev)
        {
       t@@ -62,7 +64,7 @@ disksize(int fd, int dev)
                        return u64;
        #endif
                if(ioctl(fd, BLKGETSIZE, &l) >= 0)
       -                return l*512;
       +                return (vlong)l*512;
                if(ioctl(fd, HDIO_GETGEO, &geo) >= 0)
                        return (vlong)geo.heads*geo.sectors*geo.cylinders*512;
                return 0;