$ strace perl -e'1 while read(STDIN, $buf, 512)' &1 | grep 'read(0' read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 8192) = 8192 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 8192) = 8192 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 8192) = 3616 read(0, "", 8192) = 0 $ strace perl -e'1 while sysread(STDIN, $buf, 512)' &1 | grep 'read(0' read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"..., 512) = 512 read(0, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 512) = 32 read(0, "", 512) = 0