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.