UNIX for Dummies Questions & Answers

#!/usr/bin/env bash

# @(#) s1	Demonstrate non-interactive rcs check-in.

# Utility functions: print-as-echo, print-line-with-visual-space.
pe() { for i;do printf "%s" "$i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }

# Remove debris from previous attempts, create new RCS.
pl " Contents of new directory RCS:"
rm -rf RCS
mkdir RCS
ls -lgG RCS

# Create a data file.
pe ' Hello, world. ($Revision$)' > hi.txt
pl " Contents of text file:"
cat hi.txt

# Check in file.
pl " Contents of checked-in file:"
ci -l -t"-Original" hi.txt
cat hi.txt

# Check directory.
pl " Contents of RCS/:"
ls -lgG RCS

# Modify file in place, check in changes:"
pl " Modify file, check in changes:"
sed -i 's/world/universe/' hi.txt
ci -l -m"Next" hi.txt

pl " Contents of new file:"
cat hi.txt

exit 0

% ./s1

-----
 Contents of new directory RCS:
total 0

-----
 Contents of text file:
 Hello, world. ($Revision$)

-----
 Contents of checked-in file:
RCS/hi.txt,v  <--  hi.txt
initial revision: 1.1
done
 Hello, world. ($Revision: 1.1 $)

-----
 Contents of RCS/:
total 4
-r--r--r-- 1 230 Feb 25 16:16 hi.txt,v

-----
 Modify file, check in changes:
RCS/hi.txt,v  <--  hi.txt
new revision: 1.2; previous revision: 1.1
done

-----
 Contents of new file:
 Hello, universe. ($Revision: 1.2 $)