openrc/sh/tmpfiles.sh.in
Robin H. Johnson 5c736ad63e sh/tmpfiles.sh: Improve dry-run mode.
Dry-run with more detail is more useful this way.

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
2012-09-26 15:14:04 -07:00

309 lines
7.7 KiB
Bash
Executable File

#!/bin/sh
# This is a reimplementation of the systemd tmpfiles.d code
# Control creation, deletion, and cleaning of volatile and temporary files
#
# Copyright (c) 2012 Gentoo Foundation
#
# This instance based on the Arch Linux version:
# http://projects.archlinux.org/initscripts.git/tree/arch-tmpfiles
# As of 2012/01/01
#
# See the tmpfiles.d manpage as well:
# http://0pointer.de/public/systemd-man/tmpfiles.d.html
# This script should match the manpage as of 2012/03/12
#
DRYRUN=0
warninvalid() {
printf "tmpfiles: ignoring invalid entry on line %d of \`%s'\n" "$LINENUM" "$FILE"
error=$(( error+1 ))
} >&2
dryrun_or_real() {
local dryrun=
[ $DRYRUN -eq 1 ] && dryrun=echo
$dryrun "$@"
}
relabel() {
local path
local paths=$1 mode=$2 uid=$3 gid=$4
for path in ${paths}; do
if [ -e "$path" ]; then
[ $uid != '-' ] && dryrun_or_real chown $CHOPTS "$uid" "$path"
[ $gid != '-' ] && dryrun_or_real chgrp $CHOPTS "$gid" "$path"
[ $mode != '-' ] && dryrun_or_real chmod $CHOPTS "$mode" "$path"
[ -x /sbin/restorecon ] && dryrun_or_real restorecon $CHOPTS "$path"
fi
done
}
_b() {
# Create a block device node if it doesn't exist yet
local path=$1 mode=$2 uid=$3 gid=$4 age=$5 arg=$6
[ ! -e "$path" ] && dryrun_or_real mknod $path b ${arg%:*} ${arg#*:}
}
_c() {
# Create a character device node if it doesn't exist yet
local path=$1 mode=$2 uid=$3 gid=$4 age=$5 arg=$6
[ ! -e "$path" ] && dryrun_or_real mknod $path c ${arg%:*} ${arg#*:}
}
_f() {
# Create a file if it doesn't exist yet
local path=$1 mode=$2 uid=$3 gid=$4 age=$5 arg=$6
[ $CREATE -gt 0 ] || return 0
if [ ! -e "$path" ]; then
dryrun_or_real install -m"$mode" -o"$uid" -g"$gid" /dev/null "$path"
[ -n "$arg" ] && _w "$@"
fi
}
_F() {
# Create or truncate a file
local path=$1 mode=$2 uid=$3 gid=$4 age=$5 arg=$6
[ $CREATE -gt 0 ] || return 0
dryrun_or_real install -m"$mode" -o"$uid" -g"$gid" /dev/null "$path"
[ -n "$arg" ] && _w "$@"
}
_d() {
# Create a directory if it doesn't exist yet
local path=$1 mode=$2 uid=$3 gid=$4
[ $CREATE -gt 0 ] || return 0
if [ ! -d "$path" ]; then
dryrun_or_real install -d -m"$mode" -o"$uid" -g"$gid" "$path"
fi
}
_D() {
# Create or empty a directory
local path=$1 mode=$2 uid=$3 gid=$4
if [ -d "$path" ] && [ $REMOVE -gt 0 ]; then
dryrun_or_real find "$path" -mindepth 1 -maxdepth 1 -xdev -exec rm -rf {} +
fi
if [ $CREATE -gt 0 ]; then
dryrun_or_real install -d -m"$mode" -o"$uid" -g"$gid" "$path"
fi
}
_L() {
# Create a symlink if it doesn't exist yet
local path=$1 mode=$2 uid=$3 gid=$4 age=$5 arg=$6
[ ! -e "$path" ] && dryrun_or_real ln -s "$args" "$path"
}
_p() {
# Create a named pipe (FIFO) if it doesn't exist yet
local path=$1 mode=$2 uid=$3 gid=$4
[ $CREATE -gt 0 ] || return 0
if [ ! -p "$path" ]; then
dryrun_or_real mkfifo -m$mode "$path"
dryrun_or_real chown "$uid:$gid" "$path"
fi
}
_x() {
# Ignore a path during cleaning. Use this type to exclude paths from clean-up as
# controlled with the Age parameter. Note that lines of this type do not
# influence the effect of r or R lines. Lines of this type accept shell-style
# globs in place of of normal path names.
:
# XXX: we don't implement this
}
_r() {
# Remove a file or directory if it exists. This may not be used to remove
# non-empty directories, use R for that. Lines of this type accept shell-style
# globs in place of normal path names.
local path
local paths=$1
[ $REMOVE -gt 0 ] || return 0
for path in ${paths}; do
if [ -f "$path" ]; then
dryrun_or_real rm -f "$path"
elif [ -d "$path" ]; then
dryrun_or_real rmdir "$path"
fi
done
}
_R() {
# Recursively remove a path and all its subdirectories (if it is a directory).
# Lines of this type accept shell-style globs in place of normal path names.
local path
local paths=$1
[ $REMOVE -gt 0 ] || return 0
for path in ${paths}; do
[ -d "$path" ] && dryrun_or_real rm -rf --one-file-system "$path"
done
}
_w() {
# Write the argument parameter to a file, if it exists.
local path=$1 mode=$2 uid=$3 gid=$4 age=$5 arg=$6
if [ -f "$path" ]; then
if [ $DRYRUN -eq 1 ]; then
echo "echo \"$arg\" >>\"$path\""
else
echo "$arg" >>"$path"
fi
fi
}
_z() {
# Set ownership, access mode and relabel security context of a file or
# directory if it exists. Lines of this type accept shell-style globs in
# place of normal path names.
[ $CREATE -gt 0 ] || return 0
relabel "$@"
}
_Z() {
# Recursively set ownership, access mode and relabel security context of a
# path and all its subdirectories (if it is a directory). Lines of this type
# accept shell-style globs in place of normal path names.
[ $CREATE -gt 0 ] || return 0
CHOPTS=-R relabel "$@"
}
CREATE=0 REMOVE=0 CLEAN=0 VERBOSE=0 DRYRUN=0 error=0 LINENO=0
FILE=
fragments=
# XXX: The harcoding of /usr/lib/ is an explicit choice by upstream
tmpfiles_dirs='/usr/lib/tmpfiles.d/ /etc/tmpfiles.d/ /run/tmpfiles.d/'
tmpfiles_basenames=''
tmpfiles_d=''
# Build a list of sorted unique basenames
# directories declared later in the tmpfiles_d array will override earlier
# directories, on a per file basename basis.
# `/etc/tmpfiles.d/foo.conf' supersedes `/usr/lib/tmpfiles.d/foo.conf'.
# `/run/tmpfiles/foo.conf' will always be read after `/etc/tmpfiles.d/bar.conf'
for d in ${tmpfiles_dirs} ; do
[ -d $d ] && for f in ${d}/*.conf ; do
[ -f $f ] && tmpfiles_basenames="${tmpfiles_basenames}\n${f##*/}"
done # for f in ${d}
done # for d in ${tmpfiles_dirs}
tmpfiles_basenames="`printf "${tmpfiles_basenames}\n" | sort | uniq`"
for b in $tmpfiles_basenames ; do
real_f=''
for d in $tmpfiles_dirs ; do
f=${d}/${b}
[ -f "${f}" ] && real_f=$f
done
[ -f "${real_f}" ] && tmpfiles_d="${tmpfiles_d} ${real_f}"
done
while [ $# -gt 0 ]; do
case $1 in
--create) CREATE=1 ;;
--remove) REMOVE=1 ;;
--clean) CLEAN=1 ;; # TODO: Not implemented
--verbose) VERBOSE=1 ;;
--dryrun|--dry-run) DRYRUN=1 ;;
esac
shift
done
if [ $(( CLEAN )) -eq 1 ] ; then
printf '%s clean mode is not implemented\n' "${0##*/}"
exit 1
fi
if [ $(( CREATE + REMOVE )) -ne 1 ] ; then
printf 'usage: %s [--create] [--remove] [--clean] [--verbose] [--dry-run]\n' "${0##*/}"
exit 1
fi
error=0
# loop through the gathered fragments, sorted globally by filename.
# `/run/tmpfiles/foo.conf' will always be read after `/etc/tmpfiles.d/bar.conf'
for FILE in $tmpfiles_d ; do
LINENUM=0
### FILE FORMAT ###
# XXX: We ignore the 'Age' parameter
# 1 2 3 4 5 6 7
# Cmd Path Mode UID GID Age Argument
# d /run/user 0755 root root 10d -
# Mode, UID, GID, Age, Argument may be omitted!
# XXX: Upstream says whitespace is NOT permitted in the Path argument.
# But IS allowed when globs are expanded for the x/r/R/z/Z types.
while read line; do
LINENUM=$(( LINENUM+1 ))
# This will skip over comments and empty lines
set -- $line
# Unless we have both command and path, skip this line.
if [ -z "$1" -o -z "$2" ]; then
continue
fi
# whine about invalid entries
case $1 in
f|F|w|d|D|p|L|c|b|x|r|R|z|Z) ;;
\#) continue ;;
*) warninvalid ; continue ;;
esac
cmd=$1
path=$2
# fall back on defaults when parameters are passed as '-'
if [ "$3" = '-' -o "$3" = '' ]; then
case ${1} in
p|f|F) mode=0644 ;;
d|D) mode=0755 ;;
z|Z|x|r|R|L) ;;
esac
else
mode=$3
fi
uid=$4
gid=$5
age=$6
arg=$7
[ "${4}" = '-' -o "${4}" = '' ] && uid=0
[ "${5}" = '-' -o "${5}" = '' ] && gid=0
[ "${6}" = '-' -o "${6}" = '' ] && age=0
[ "${7}" = '-' -o "${7}" = '' ] && arg=''
set -- "$path" "$mode" "$uid" "$gid" "$age" "$arg"
[ "$VERBOSE" -eq "1" ] && echo _$cmd "$@"
_$cmd "$@"
rc=$?
if [ "${DRYRUN}" -eq "0" ]; then
[ $rc -ne 0 ] && error=$((error + 1))
fi
done <$FILE
done
exit $error
# vim: set ts=2 sw=2 sts=2 noet ft=sh: