Lock an opened file against changelist submission.

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

Locking files prevents all 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.