=item getenv
-Returns the value of the specified enironment variable.
+Returns the value of the specified environment variable.
The same information is available through the C<%ENV> array.
=item geteuid
=item getpgrp
This is identical to Perl's builtin C<getpgrp()> function for
-returning the prcess group identifier of the current process, see
+returning the process group identifier of the current process, see
L<perlfunc/getpgrp>.
=item getpid
code if this is zero or less, the signal was sent by
a user process and the uid and pid make sense,
otherwise the signal was sent by the kernel
+
+The following are also defined by POSIX/SUSv3, but unfortunately
+not very widely implemented:
+
pid the process id generating the signal
uid the uid of the process id generating the signal
status exit value or signal for SIGCHLD
=item stat
This is identical to Perl's builtin C<stat()> function
-for retutning information about files and directories.
+for returning information about files and directories.
=item strcat