is unspecified.
.\" POSIX.1-2001 leaves this possibility unspecified; most
.\" implementations (including Linux) zero out the structure
-.\" in this case, but at at least one implementation (AIX 5.1)
+.\" in this case, but at least one implementation (AIX 5.1)
.\" does not -- MTK Nov 04
To distinguish this case from that where a child was in a
waitable state, zero out the