Lock an opened file against other users submitting changes to the file.

p4 [g-opts] lock [-c changelist] [file ...]
p4 [g-opts] lock -g -c changelist

Locking files prevents other users from submitting changes to those files. If the files are already locked by another user, p4 lock fails. When the user who locked a particular file submits the file, the lock is released.

This command is normally called with a specific file argument; if no file argument is provided, all open files in the default changelist are locked. If the -c changelist option is used, all open files matching the given file pattern in changelist changelist are locked.

In an edge/commit architecture, use the -g flag to lock the files locally and globally. This syntax variant may only be used from an edge server, and it must be used with the -c changelist option. This lock is removed by the p4 unlock -g command or by any submit command for the specified changelist.

If the server configurable server.locks.global is set to 1, when p4 lock is issued on an edge server it takes global locks on the commit server by default.