shmctl

shmctl ID,CMD,ARG

Calls the System V IPC function shmctl. 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 shmid_ds structure. Returns like ioctl: undef for error; "0 but true" for zero; and the actual return value otherwise. See also SysV IPC in perlipc and IPC::SysV documentation.

Portability issues: shmctl in perlport.

doc_perl
2016-12-06 03:27:10
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