getpgrp
getpgrp pid
Returns the current process group for the specified
process ID (pid
). Use a
pid
of 0
for the current process. Invoking
getpgrp
will produce a fatal
error if used on a machine that doesn’t implement the getpgrp
system call. If
pid
is omitted, the function returns
the process group of the current process (the same as using a
pid
of 0
). On systems implementing this
operator with the POSIX getpgrp(2)
system call,
pid
must be omitted or, if supplied,
must be 0
.
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