Perl 5 version 26.3 documentation


  • msgctl ID,CMD,ARG

    Calls the System V IPC function msgctl(2). You'll probably have to say

    1. 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.