shmread
See the current Perl documentation for shmread.
Here is our local, out-dated (pre-5.6) version:
shmread - read SysV shared memory
shmread ID,VAR,POS,SIZE
Reads or writes the System
V shared memory segment
ID starting at position
POS for size
SIZE by attaching to it, copying in/out, and detaching from it. When reading,
VAR must be a variable that will hold the data read. When writing, if
STRING is too long, only
SIZE bytes are used; if
STRING is too short, nulls are written to fill out
SIZE bytes. Return
TRUE if successful, or
FALSE if there is an error. See also
IPC::SysV documentation.