I'm not a guru when it comes to all the differing compliance levels of POSIX but I can tell you that fragment of code appears to work on Solaris 8 (sparc), Solaris 10 (sparc) and FreeBSD 7 (i386).

The leap second is the rare and obscure practice of occasionally adding a second to the Coordinated Universal Time (UTC) system that most of us use to set our watches. It's necessary, but not ...