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 returnedshmid_ds
structure. Returns like ioctl:undef
for error; "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.