rlog --version (return code: 0)
rlog (GNU RCS) 5.9.4 Copyright (C) 2010-2015 Thien-Thi Nguyen Copyright (C) 1990-1995 Paul Eggert Copyright (C) 1982,1988,1989 Walter F. Tichy, Purdue CS License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
rlog --help (return code: 0)
Usage: rlog [options] file ... Print log messages and other information about RCS files. Options: -L Ignore RCS files with no locks set. -R Print the RCS file name only. -h Print only the "header" information. -t Like -h, but also include the description. -N Omit symbolic names. -b Select the default branch. -dDATES Select revisions in the range DATES, with spec: D -- single revision D or earlier D1<D2 -- between D1 and D2, exclusive D2>D1 -- likewise <D, D> -- before D >D, D< -- after D Use <= or >= to make ranges inclusive; DATES may also be a list of semicolon-separated specs. -l[WHO] Select revisions locked by WHO (comma-separated list) only, or by anyone if WHO is omitted. -r[REVS] Select revisions in REVS, a comma-separated list of range specs, one of: REV, REV:, :REV, REV1:REV2 -sSTATES Select revisions with state in STATES (comma-separated list). -w[WHO] Select revisions checked in by WHO (comma-separated list), or by the user if WHO is omitted. -T No effect; included for compatibility with other commands. -V Obsolete; do not use. -VN Emulate RCS version N. -xSUFF Specify SUFF as a slash-separated list of suffixes used to identify RCS file names. -zZONE Specify date output format in keyword-substitution. -q No effect, included for consistency with other commands. Report bugs to: <email@example.com> RCS home page: <http://www.gnu.org/software/rcs/> General help using GNU software: <http://www.gnu.org/gethelp/>