co 命令

常用示例

说明

co is the checkout command for RCS (Revision Control System), a legacy version control system for managing file revisions. It retrieves revisions from RCS files and places them in the working directory for viewing or editing. By default, co retrieves the latest revision in read-only mode. The -l flag locks the revision for exclusive editing, preventing others from checking out the same revision for modification. After editing, the file is checked back in with ci. RCS stores revision history in special files (typically ending in ,v) and co reconstructs working files from this delta-based storage. While largely superseded by distributed version control systems, RCS remains useful for simple single-file versioning.

参数

-l

Lock the checked-out revision to prevent others from editing.

-u

Unlock the revision; check out without locking.

-r_REV_

Check out specific revision REV.

-d_DATE_

Check out the latest revision at or before DATE.

-f

Force overwrite of the working file if it exists.

-q

Quiet mode; suppress diagnostic output.

-p

Print the revision to stdout instead of creating a working file.

-j_JOINLIST_

Generate new revision by merging differences between revisions.

-k_SUBST_

Set keyword substitution mode (kv, kvl, k, o, b, v).

-s_STATE_

Check out the latest revision with the given state.

-w_LOGIN_

Check out the latest revision checked in by LOGIN.

-T

Set the working file's modification time to the revision's check-in time.

-V

Print RCS version number.