Perl 5 version 8.0 documentation


  • shmctl ID,CMD,ARG

    Calls the System V IPC function shmctl. 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 which will hold the returned shmid_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 IPC::SysV documentation.