--- /dev/null
+#!/bin/sh
+
+case $# in
+0)
+ echo "rcs-checkin: usage: rcs-checkin file ..."
+ echo "rcs-checkin: function: checks file.~*~ and file into a new RCS file"
+ echo "rcs-checkin: function: uses the file's first line for the description"
+esac
+
+# expr pattern to extract owner from ls -l output
+ls_owner_pattern='[^ ][^ ]* *[^ ][^ ]* *\([^ ][^ ]*\)'
+
+for file
+do
+ # Check that file is readable.
+ <$file || exit
+
+ # Make it easier to say `rcs-checkin *'
+ # by ignoring file names that already contain `~', or end in `,v'.
+ case $file in
+ *~* | *,v) continue
+ esac
+ # Ignore non-files too.
+ test -f "$file" || continue
+
+ # If the RCS file does not already exist,
+ # initialize it with a description from $file's first line.
+ rlog -R "$file" >/dev/null 2>&1 ||
+ rcs -i -q -t-"`sed 1q $file`" "$file" || exit
+
+ # Get list of old files.
+ oldfiles=`
+ ls $file.~[0-9]*~ 2>/dev/null |
+ sort -t~ -n +1
+ `
+
+ # Check that they are properly sorted by date.
+ case $oldfiles in
+ ?*)
+ oldfiles_by_date=`ls -rt $file $oldfiles`
+ test " $oldfiles
+$file" = " $oldfiles_by_date" || {
+ echo >&2 "rcs-checkin: skipping $file, because its mod times are out of order.
+
+Sorted by mod time:
+$oldfiles_by_date
+
+Sorted by name:
+$oldfiles
+$file"
+ continue
+ }
+ esac
+
+ echo >&2 rcs-checkin: checking in: $oldfiles $file
+
+ # Save $file as $file.~-~ temporarily.
+ mv "$file" "$file.~-~" || exit
+
+ # Rename each old file to $file, and check it in.
+ for oldfile in $oldfiles
+ do
+ mv "$oldfile" "$file" || exit
+ ls_l=`ls -l "$file"` || exit
+ owner=-w`expr " $ls_l" : " $ls_owner_pattern"` || owner=
+ ci -d -l -q $owner "$file" </dev/null || exit
+ done
+
+ # Bring $file back from $file.~-~, and check it in.
+ mv "$file.~-~" "$file" || exit
+ ls_l=`ls -l "$file"` || exit
+ owner=-w`expr " $ls_l" : " $ls_owner_pattern"` || owner=
+ ci -d -q -u $owner -m"entered into RCS" "$file" || exit
+done
+