3.8 prs

The prs command (mnemonic: “print revision summary”) prints information about an SCCS file in a user-defined format. There are options for selecting which deltas are reported on; selection is possible by check-in time or by SID. The format of the output can also be specified on the command line. All parts of an SCCS file can be dumped with prs. Those parts which appear once per delta can be uniquely identified by SID or by time.

Typical uses for prs are

• Producing an audit trail of who changed what, and why, for example for a software release report, or for ISO 9000 documentation.
• Discovering how a particular piece of code became broken, and deducing which change broke it. The get -m command is also useful for this, see Options for get.
• Listing all changes made on Friday afternoons, as a preparation for extra checking.