openrc/sh/tmpfiles.sh.in

458 lines
12 KiB
Bash
Raw Normal View History

#!/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
# Released under the 2-clause BSD license.
#
# This instance is a pure-POSIX sh version, written by Robin H Johnson
# <robbat2@gentoo.org>, based on the Arch Linux version as of 2012/01/01:
# http://projects.archlinux.org/initscripts.git/tree/arch-tmpfiles
#
# See the tmpfiles.d manpage as well:
# https://www.freedesktop.org/software/systemd/man/tmpfiles.d.html
# This script should match the old manpage
# http://0pointer.de/public/systemd-man/tmpfiles.d.html
# as of 2012/03/12 and also implements some more recent features
#
DRYRUN=0
CHECKPATH="@LIBEXECDIR@/bin/checkpath"
checkprefix() {
n=$1
shift
for x in $@; do
case $n in
${x}*) return 0 ;;
esac
done
return 1
}
warninvalid() {
printf "tmpfiles: ignoring invalid entry on line %d of \`%s'\n" "$LINENUM" "$FILE"
error=$(( error+1 ))
} >&2
invalid_option() {
printf "tmpfiles: invalid option '%s'\n" "$1" >&2
exit 1
}
dryrun_or_real() {
local dryrun=
[ $DRYRUN -eq 1 ] && dryrun=echo
$dryrun "$@"
}
_chattr() {
local attr="$2"
case $attr in
[+-=]*) : ;;
'') return ;;
*) attr="+$attr" ;;
esac
local IFS=
dryrun_or_real chattr $1 "$attr" -- $3
}
relabel() {
local path
local paths=$1 mode=$2 uid=$3 gid=$4
for path in ${paths}; do
if [ -e "$path" ]; then
[ -x /sbin/restorecon ] && dryrun_or_real restorecon $CHOPTS "$path"
[ $uid != '-' ] && dryrun_or_real chown $CHOPTS "$uid" "$path"
[ $gid != '-' ] && dryrun_or_real chgrp $CHOPTS "$gid" "$path"
[ $mode != '-' ] && dryrun_or_real chmod $CHOPTS "$mode" "$path"
fi
done
}
splitpath() {
local path=$1
while [ -n "$path" ]; do
echo $path
path=${path%/*}
done
}
_restorecon() {
local path=$1
if [ -x /sbin/restorecon ]; then
dryrun_or_real restorecon -F $(splitpath "$path")
fi
}
_b() {
# Create a block device node if it doesn't exist yet
local path=$1 mode=$2 uid=$3 gid=$4 age=$5 arg=$6
if [ ! -e "$path" ]; then
dryrun_or_real mknod -m $mode $path b ${arg%:*} ${arg#*:}
_restorecon "$path"
dryrun_or_real chown $uid:$gid $path
fi
}
_c() {
# Create a character device node if it doesn't exist yet
local path=$1 mode=$2 uid=$3 gid=$4 age=$5 arg=$6
if [ ! -e "$path" ]; then
dryrun_or_real mknod -m $mode $path c ${arg%:*} ${arg#*:}
_restorecon "$path"
dryrun_or_real chown $uid:$gid $path
fi
}
_C() {
# recursively copy a file or directory
local path=$1 mode=$2 uid=$3 gid=$4 age=$5 arg=$6
if [ ! -e "$path" ]; then
dryrun_or_real cp -r "$arg" "$path"
_restorecon "$path"
[ $uid != '-' ] && dryrun_or_real chown "$uid" "$path"
[ $gid != '-' ] && dryrun_or_real chgrp "$gid" "$path"
[ $mode != '-' ] && dryrun_or_real chmod "$mode" "$path"
fi
}
_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 $CHECKPATH -fq -m "$mode" -o "$uid:$gid" "$path"
[ -z "$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 $CHECKPATH -Fq -m "$mode" -o "$uid:$gid" "$path"
[ -z "$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 mkdir -p "$path" 2>/dev/null
_restorecon "$path"
dryrun_or_real $CHECKPATH -dq -m "$mode" -o "$uid:$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 {} +
_restorecon "$path"
fi
if [ $CREATE -gt 0 ]; then
dryrun_or_real mkdir -p "$path" 2>/dev/null
_restorecon "$path"
dryrun_or_real $CHECKPATH -Dq -m "$mode" -o "$uid:$gid" "$path"
fi
}
_v() {
# Create a subvolume if the path does not exist yet and the file system
# supports this (btrfs). Otherwise create a normal directory.
# TODO: Implement btrfs subvol creation.
_d "$@"
}
_q() {
# Similar to _v. However, make sure that the subvolume will be assigned
# to the same higher-level quota groups as the subvolume it has
# been created in.
# TODO: Implement btrfs subvol creation.
_d "$@"
}
_Q() {
# Similar to q. However, instead of copying the higher-level quota
# group assignments from the parent as-is, the lowest quota group
# of the parent subvolume is determined that is not the
# leaf quota group.
# TODO: Implement btrfs subvol creation.
_d "$@"
}
_h() {
# Set file/directory attributes. Lines of this type accept
# shell-style globs in place of normal path names.
# The format of the argument field matches chattr
_chattr '' "$6" "$1"
}
_H() {
# Recursively set file/directory attributes. Lines of this type accept
# shell-syle globs in place of normal path names.
# Does not follow symlinks
_chattr -R "$6" "$1"
}
_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 "$arg" "$path"
_restorecon "$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 $CHECKPATH -pq -m $mode -o "$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
}
_X() {
# Ignore a path during cleanup. Use this type to prevent path
# removal as controled with the age parameter. Note that if path is
# a directory, the content of the directory is not excluded from
# clean-up, only the directory itself.
# Lines of this type accept shell-style globs in place 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.
[ $CREATE -gt 0 ] || return 0
CHOPTS=-R relabel "$@"
}
BOOT=0 CREATE=0 REMOVE=0 CLEAN=0 VERBOSE=0 DRYRUN=0 error=0 LINENO=0
EXCLUDE=
PREFIX=
FILES=
while [ $# -gt 0 ]; do
case $1 in
--boot) BOOT=1 ;;
--create) CREATE=1 ;;
--remove) REMOVE=1 ;;
--clean) CLEAN=1 ;; # TODO: Not implemented
--verbose) VERBOSE=1 ;;
--dryrun|--dry-run) DRYRUN=1 ;;
--exclude-prefix=*) EXCLUDE="${EXCLUDE}${1##--exclude-prefix=} " ;;
--prefix=*) PREFIX="${PREFIX}${1##--prefix=} " ;;
-*) invalid_option "$1" ;;
*) FILES="${FILES} $1"
esac
shift
done
if [ $(( CLEAN )) -eq 1 ] ; then
printf '%s clean mode is not implemented\n' "${0##*/}"
exit 1
fi
if [ "$CREATE$REMOVE" = '00' ]; then
printf 'usage: %s [--exclude-prefix=path] [--prefix=path] [--boot] [--create] [--remove] [--clean] [--verbose] [--dry-run]\n' "${0##*/}"
exit 1
fi
# XXX: The harcoding of /usr/lib/ is an explicit choice by upstream
tmpfiles_dirs='/usr/lib/tmpfiles.d /run/tmpfiles.d /etc/tmpfiles.d'
tmpfiles_basenames=''
if [ -z "${FILES}" ]; then
# 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 ${d}/*.conf ; do
case "${f##*/}" in
systemd.conf|systemd-*.conf) continue;;
esac
[ -f $f ] && tmpfiles_basenames="${tmpfiles_basenames}\n${f##*/}"
done # for f in ${d}
done # for d in ${tmpfiles_dirs}
FILES="$(printf "${tmpfiles_basenames}\n" | sort -u )"
fi
tmpfiles_d=''
for b in ${FILES} ; do
if [ "${b##*/}" != "${b}" ]; then
# The user specified a path on the command line
# Just pass it through unaltered
tmpfiles_d="${tmpfiles_d} ${b}"
else
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}"
fi
done
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'
FILE=
for FILE in $tmpfiles_d ; do
LINENUM=0
### FILE FORMAT ###
# XXX: We ignore the 'Age' parameter
# 1 2 3 4 5 6 7
# Cmd Path Mode UID GID Age Argument
# d /run/user 0755 root root 10d -
# Mode, UID, GID, Age, Argument may be omitted!
# If Cmd ends with !, the line is only processed if --boot is passed
# XXX: Upstream says whitespace is NOT permitted in the Path argument.
# But IS allowed when globs are expanded for the x/r/R/z/Z types.
while read cmd path mode uid gid age arg; do
LINENUM=$(( LINENUM+1 ))
FORCE=0
# Unless we have both command and path, skip this line.
if [ -z "$cmd" -o -z "$path" ]; then
continue
fi
case $cmd in
\#*) continue ;;
esac
while [ ${#cmd} -gt 1 ]; do
case $cmd in
*!) cmd=${cmd%!}; [ "$BOOT" -eq "1" ] || continue 2 ;;
*+) cmd=${cmd%+}; FORCE=1; ;;
*) warninvalid ; continue 2 ;;
esac
done
# whine about invalid entries
case $cmd in
f|F|w|d|D|v|p|L|c|C|b|x|X|r|R|z|Z|q|Q|h|H) ;;
*) warninvalid ; continue ;;
esac
# fall back on defaults when parameters are passed as '-'
if [ "$mode" = '-' -o "$mode" = '' ]; then
case "$cmd" in
p|f|F) mode=0644 ;;
d|D|v) mode=0755 ;;
C|z|Z|x|r|R|L) ;;
esac
fi
[ "$uid" = '-' -o "$uid" = '' ] && uid=0
[ "$gid" = '-' -o "$gid" = '' ] && gid=0
[ "$age" = '-' -o "$age" = '' ] && age=0
[ "$arg" = '-' -o "$arg" = '' ] && arg=''
set -- "$path" "$mode" "$uid" "$gid" "$age" "$arg"
[ -n "$EXCLUDE" ] && checkprefix $path $EXCLUDE && continue
[ -n "$PREFIX" ] && ! checkprefix $path $PREFIX && continue
if [ $FORCE -gt 0 ]; then
case $cmd in
p|L|c|b) [ -f "$path" ] && dryrun_or_real rm -f "$path"
esac
fi
[ "$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: