shmctl

NAME

shmctl - SysV shared memory operations


SYNOPSIS

shmctl ID,CMD,ARG


DESCRIPTION

Calls the System V IPC function shmctl. 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.