dp_atclose - arrange for commands to be evaluated when a file or socket
is closed
L'|0u-1v'
L'0u+1v-0u'
dp_atclose sockId option ?cmd?
The dp_atclose command manages the dp_atclose list, a list of
callback routines that are evaluated just before sockId is actually
closed. This is useful for networking applications, where filehandlers
associated with a socket must be deleted when a socket is closed.
The argument option specifies the operation to be performed
on the dp_atclose list. The valid options are:
dp_atclose sockId list
Returns the current dp_atclose list associated with sockId.
dp_atclose sockId set newList
Sets the dp_atclose list associated with sockId to newList.
dp_atclose sockId append callback
Append callback to the end of the dp_atclose list associated with
sockId.
dp_atclose sockId appendUnique callback
Appends callback to the end of the dp_atclose list associated with
sockId if it's not already a member of the list.
dp_atclose sockId prepend callback
Inserts callback at the front of the dp_atclose list associated
with sockId.
dp_atclose sockId insert beforeCallback callback
Inserts callback before beforeCallback in the dp_atclose
list associated with sockId. If beforeCallback is not in
the dp_atclose list associated with sockId, no action is taken.
dp_atclose sockId delete callback
Delete callback from the dp_atclose list associated with
sockId. If callback is not in the dp_atclose list associated
with sockId, no action is taken.
dp_atclose sockId clear
Clears the dp_atclose list associated with sockId.
Brian Smith (bsmith@cs.berkeley.edu)
Steve Yen (syen@cs.berkeley.edu)