msgctl ID,CMD,ARG
Calls the System V IPC function msgctl(2). You'll probably have to say
use IPC::SysV;
first to get the correct constant definitions. If CMD is IPC_STAT
, then ARG must be a variable that will hold the returned msqid_ds
structure. Returns like ioctl
: the undefined value for error, "0 but true"
for zero, or the actual return value otherwise. See also SysV IPC in perlipc and the documentation for IPC::SysV
and IPC::Semaphore
.
Portability issues: msgctl in perlport.
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