154 lines
4.3 KiB
Bash
Executable File
154 lines
4.3 KiB
Bash
Executable File
#!/bin/sh
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set -e
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# Filters out UNKNOWN users and groups, prints a warning on stderr.
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filter_unknown() {
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CMD=$1
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while read line; do
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# if the first n chars of $line equal "$CMD UNKNOWN "...
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if [ "$(printf %.$((9+${#CMD}))s "$line")" = "$CMD UNKNOWN " ]; then
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echo Bad "$2" for "$line" >&2
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else
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echo "$line"
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fi
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done
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}
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filter_ignore() {
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case "$VCS" in
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darcs) ignorefile=.darcsignore ;;
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git) ignorefile=.gitignore ;;
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esac
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if [ -n "$ignorefile" ] && [ -e "$ignorefile" ]; then
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listfile="$( mktemp -t etckeeper-$VCS.XXXXXXXXXX )"
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case "$VCS" in
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darcs)
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grep -v '^[[:space:]]*\(#\|$\)' "$ignorefile" > "$listfile" || true
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grep -Evf "$listfile"
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;;
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git)
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(git ls-files -oi --exclude-standard; git ls-files -oi --exclude-standard --directory) | sort | uniq > "$listfile" || true
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sed 's/^\.\///' | grep -xFvf "$listfile"
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;;
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esac
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rm -f "$listfile"
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unset listfile
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else
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cat -
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fi
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}
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shellquote() {
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# Single quotes text, escaping existing single quotes.
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sed -e "s/'/'\"'\"'/g" -e "s/^/'/" -e "s/$/'/"
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}
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generate_metadata() {
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# This function generates the script commands to fix any file
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# ownerships that aren't owner=root, group=root, as well as to
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# store the permissions of files.
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# The script is produced on stdout. Errors go to stderr.
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#
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# The script can use a 'maybe' function, which only runs a command
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# if the file in its last argument exists.
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# We want files in the directory containing VCS data
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# but we want find to ignore the VCS files themselves.
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#
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# (Note that when using this, the find expression must end with
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# -print or -exec, else the excluded directories will actually be
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# printed!)
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NOVCS='. -path ./.git -prune -o -path ./.bzr -prune -o -path ./.hg -prune -o -path ./_darcs -prune -o'
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# Keep the sort order the same at all times.
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LC_COLLATE=C
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export LC_COLLATE
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if [ "$VCS" = git ] || [ "$VCS" = hg ]; then
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# These version control systems do not track directories,
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# so empty directories must be stored specially.
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find $NOVCS -type d -empty -print |
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sort | shellquote | sed -e "s/^/mkdir -p /"
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fi
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if [ "$VCS" = darcs ]; then
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# This version control system does not track symlinks,
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# so they must be stored specially.
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find $NOVCS -type l -print | sort | filter_ignore | while read link; do
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dest=$( readlink "$link" )
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printf "ln -sf '%s' '%s'\n" "$(echo "$dest" | shellquote)" "$(echo "$link" | shellquote)"
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done
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fi
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# Store things that don't have the default user or group.
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# Store all file modes, in case the user has an unusual umask.
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find $NOVCS \( -type f -or -type d \) -print | filter_ignore | sort | perl -ne '
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BEGIN { $q=chr(39) }
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sub uidname {
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my $want=shift;
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if (exists $uidcache{$want}) {
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return $uidcache{$want};
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}
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my $name=scalar getpwuid($want);
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return $uidcache{$want}=defined $name ? $name : $want;
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}
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sub gidname {
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my $want=shift;
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if (exists $gidcache{$want}) {
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return $gidcache{$want};
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}
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my $name=scalar getgrgid($want);
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return $gidcache{$want}=defined $name ? $name : $want;
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}
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chomp;
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my @stat=stat($_);
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my $mode = $stat[2];
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my $uid = $stat[4];
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my $gid = $stat[5];
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s/$q/$q"$q"$q/g; # escape single quotes
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s/^/$q/;
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s/$/$q/;
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if ($uid != $>) {
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printf "maybe chown $q%s$q %s\n", uidname($uid), $_;
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}
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if ($gid != $)) {
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printf "maybe chgrp $q%s$q %s\n", gidname($gid), $_;
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}
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printf "maybe chmod %04o %s\n", $mode & 07777, $_;
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'
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# We don't handle xattrs.
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# Maybe check for getfattr/setfattr and use them if they're available?
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}
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if [ "$VCS" = git ] || [ "$VCS" = hg ] || [ "$VCS" = bzr ] || [ "$VCS" = darcs ]; then
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if [ -f .metadata ]; then
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# remove obsolete .metadata file
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# git allows fully deleting it at this point, other VCS
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# may not (the repo is locked for hg).
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if [ "$VCS" = git ]; then
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$VCS rm .metadata
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else
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rm -f .metadata
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fi
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fi
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echo "# Generated by etckeeper. Do not edit." > .etckeeper
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echo >> .etckeeper
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# Make sure the file is not readable by others, since it can leak
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# information about contents of non-readable directories in /etc.
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chmod 700 .etckeeper
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generate_metadata >> .etckeeper
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# stage the file as part of the current commit
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if [ "$VCS" = git ]; then
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# this will do nothing if the metadata file is unchanged.
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git add .etckeeper
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fi
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# hg, bzr and darcs add not done, they will automatically
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# include the file in the current commit
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fi
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