Current Dir: /snap/core22/2955/usr/sbin/
[FILE] aa-remove-unknown [ edit | delete | rename ]
[FILE] aa-status [ edit | delete | rename ]
[FILE] aa-teardown [ edit | delete | rename ]
[FILE] add-shell [ edit | delete | rename ]
[FILE] addgroup [ edit | delete | rename ]
[FILE] adduser [ edit | delete | rename ]
[FILE] agetty [ edit | delete | rename ]
[FILE] apparmor_parser [ edit | delete | rename ]
[FILE] apparmor_status [ edit | delete | rename ]
[FILE] arpd [ edit | delete | rename ]
[FILE] arptables [ edit | delete | rename ]
[FILE] arptables-nft [ edit | delete | rename ]
[FILE] arptables-nft-restore [ edit | delete | rename ]
[FILE] arptables-nft-save [ edit | delete | rename ]
[FILE] arptables-restore [ edit | delete | rename ]
[FILE] arptables-save [ edit | delete | rename ]
[FILE] badblocks [ edit | delete | rename ]
[FILE] blkdeactivate [ edit | delete | rename ]
[FILE] blkdiscard [ edit | delete | rename ]
[FILE] blkid [ edit | delete | rename ]
[FILE] blkzone [ edit | delete | rename ]
[FILE] blockdev [ edit | delete | rename ]
[FILE] bridge [ edit | delete | rename ]
[FILE] capsh [ edit | delete | rename ]
[FILE] cfdisk [ edit | delete | rename ]
[FILE] chcpu [ edit | delete | rename ]
[FILE] chgpasswd [ edit | delete | rename ]
[FILE] chmem [ edit | delete | rename ]
[FILE] chpasswd [ edit | delete | rename ]
[FILE] chroot [ edit | delete | rename ]
[FILE] cpgr [ edit | delete | rename ]
[FILE] cppw [ edit | delete | rename ]
[FILE] cryptdisks_start [ edit | delete | rename ]
[FILE] cryptdisks_stop [ edit | delete | rename ]
[FILE] cryptsetup [ edit | delete | rename ]
[FILE] cryptsetup-reencrypt [ edit | delete | rename ]
[FILE] cryptsetup-ssh [ edit | delete | rename ]
[FILE] ctrlaltdel [ edit | delete | rename ]
[FILE] dcb [ edit | delete | rename ]
[FILE] debugfs [ edit | delete | rename ]
[FILE] delgroup [ edit | delete | rename ]
[FILE] deluser [ edit | delete | rename ]
[FILE] depmod [ edit | delete | rename ]
[FILE] devlink [ edit | delete | rename ]
[FILE] dhclient [ edit | delete | rename ]
[FILE] dhclient-script [ edit | delete | rename ]
[FILE] dmsetup [ edit | delete | rename ]
[FILE] dmstats [ edit | delete | rename ]
[FILE] dosfsck [ edit | delete | rename ]
[FILE] dosfslabel [ edit | delete | rename ]
[FILE] dumpe2fs [ edit | delete | rename ]
[FILE] e2freefrag [ edit | delete | rename ]
[FILE] e2fsck [ edit | delete | rename ]
[FILE] e2image [ edit | delete | rename ]
[FILE] e2label [ edit | delete | rename ]
[FILE] e2mmpstatus [ edit | delete | rename ]
[FILE] e2scrub [ edit | delete | rename ]
[FILE] e2scrub_all [ edit | delete | rename ]
[FILE] e2undo [ edit | delete | rename ]
[FILE] e4crypt [ edit | delete | rename ]
[FILE] e4defrag [ edit | delete | rename ]
[FILE] ebtables [ edit | delete | rename ]
[FILE] ebtables-nft [ edit | delete | rename ]
[FILE] ebtables-nft-restore [ edit | delete | rename ]
[FILE] ebtables-nft-save [ edit | delete | rename ]
[FILE] ebtables-restore [ edit | delete | rename ]
[FILE] ebtables-save [ edit | delete | rename ]
[FILE] faillock [ edit | delete | rename ]
[FILE] fatlabel [ edit | delete | rename ]
[FILE] fdisk [ edit | delete | rename ]
[FILE] filefrag [ edit | delete | rename ]
[FILE] findfs [ edit | delete | rename ]
[FILE] fsck [ edit | delete | rename ]
[FILE] fsck.cramfs [ edit | delete | rename ]
[FILE] fsck.ext2 [ edit | delete | rename ]
[FILE] fsck.ext3 [ edit | delete | rename ]
[FILE] fsck.ext4 [ edit | delete | rename ]
[FILE] fsck.fat [ edit | delete | rename ]
[FILE] fsck.minix [ edit | delete | rename ]
[FILE] fsck.msdos [ edit | delete | rename ]
[FILE] fsck.vfat [ edit | delete | rename ]
[FILE] fsfreeze [ edit | delete | rename ]
[FILE] fstab-decode [ edit | delete | rename ]
[FILE] fstrim [ edit | delete | rename ]
[FILE] genl [ edit | delete | rename ]
[FILE] getcap [ edit | delete | rename ]
[FILE] getpcaps [ edit | delete | rename ]
[FILE] getty [ edit | delete | rename ]
[FILE] groupadd [ edit | delete | rename ]
[FILE] groupdel [ edit | delete | rename ]
[FILE] groupmems [ edit | delete | rename ]
[FILE] groupmod [ edit | delete | rename ]
[FILE] grpck [ edit | delete | rename ]
[FILE] grpconv [ edit | delete | rename ]
[FILE] grpunconv [ edit | delete | rename ]
[FILE] halt [ edit | delete | rename ]
[FILE] hwclock [ edit | delete | rename ]
[FILE] iconvconfig [ edit | delete | rename ]
[FILE] init [ edit | delete | rename ]
[FILE] insmod [ edit | delete | rename ]
[FILE] installkernel [ edit | delete | rename ]
[FILE] integritysetup [ edit | delete | rename ]
[FILE] invoke-rc.d [ edit | delete | rename ]
[FILE] ip [ edit | delete | rename ]
[FILE] ip6tables [ edit | delete | rename ]
[FILE] ip6tables-apply [ edit | delete | rename ]
[FILE] ip6tables-legacy [ edit | delete | rename ]
[FILE] ip6tables-legacy-restore [ edit | delete | rename ]
[FILE] ip6tables-legacy-save [ edit | delete | rename ]
[FILE] ip6tables-nft [ edit | delete | rename ]
[FILE] ip6tables-nft-restore [ edit | delete | rename ]
[FILE] ip6tables-nft-save [ edit | delete | rename ]
[FILE] ip6tables-restore [ edit | delete | rename ]
[FILE] ip6tables-restore-translate [ edit | delete | rename ]
[FILE] ip6tables-save [ edit | delete | rename ]
[FILE] ip6tables-translate [ edit | delete | rename ]
[FILE] iptables [ edit | delete | rename ]
[FILE] iptables-apply [ edit | delete | rename ]
[FILE] iptables-legacy [ edit | delete | rename ]
[FILE] iptables-legacy-restore [ edit | delete | rename ]
[FILE] iptables-legacy-save [ edit | delete | rename ]
[FILE] iptables-nft [ edit | delete | rename ]
[FILE] iptables-nft-restore [ edit | delete | rename ]
[FILE] iptables-nft-save [ edit | delete | rename ]
[FILE] iptables-restore [ edit | delete | rename ]
[FILE] iptables-restore-translate [ edit | delete | rename ]
[FILE] iptables-save [ edit | delete | rename ]
[FILE] iptables-translate [ edit | delete | rename ]
[FILE] isosize [ edit | delete | rename ]
[FILE] killall5 [ edit | delete | rename ]
[FILE] ldattach [ edit | delete | rename ]
[FILE] ldconfig [ edit | delete | rename ]
[FILE] ldconfig.real [ edit | delete | rename ]
[FILE] logsave [ edit | delete | rename ]
[FILE] losetup [ edit | delete | rename ]
[FILE] lsmod [ edit | delete | rename ]
[FILE] luksformat [ edit | delete | rename ]
[FILE] mkdosfs [ edit | delete | rename ]
[FILE] mke2fs [ edit | delete | rename ]
[FILE] mkfs [ edit | delete | rename ]
[FILE] mkfs.bfs [ edit | delete | rename ]
[FILE] mkfs.cramfs [ edit | delete | rename ]
[FILE] mkfs.ext2 [ edit | delete | rename ]
[FILE] mkfs.ext3 [ edit | delete | rename ]
[FILE] mkfs.ext4 [ edit | delete | rename ]
[FILE] mkfs.fat [ edit | delete | rename ]
[FILE] mkfs.minix [ edit | delete | rename ]
[FILE] mkfs.msdos [ edit | delete | rename ]
[FILE] mkfs.vfat [ edit | delete | rename ]
[FILE] mkhomedir_helper [ edit | delete | rename ]
[FILE] mklost+found [ edit | delete | rename ]
[FILE] mkswap [ edit | delete | rename ]
[FILE] modinfo [ edit | delete | rename ]
[FILE] modprobe [ edit | delete | rename ]
[FILE] netplan [ edit | delete | rename ]
[FILE] newusers [ edit | delete | rename ]
[FILE] nfnl_osf [ edit | delete | rename ]
[FILE] nologin [ edit | delete | rename ]
[FILE] pam-auth-update [ edit | delete | rename ]
[FILE] pam_extrausers_chkpwd [ edit | delete | rename ]
[FILE] pam_extrausers_update [ edit | delete | rename ]
[FILE] pam_getenv [ edit | delete | rename ]
[FILE] pam_timestamp_check [ edit | delete | rename ]
[FILE] pivot_root [ edit | delete | rename ]
[FILE] plymouthd [ edit | delete | rename ]
[FILE] poweroff [ edit | delete | rename ]
[FILE] pwck [ edit | delete | rename ]
[FILE] pwconv [ edit | delete | rename ]
[FILE] pwunconv [ edit | delete | rename ]
[FILE] readprofile [ edit | delete | rename ]
[FILE] reboot [ edit | delete | rename ]
[FILE] remove-shell [ edit | delete | rename ]
[FILE] resize2fs [ edit | delete | rename ]
[FILE] rfkill [ edit | delete | rename ]
[FILE] rmmod [ edit | delete | rename ]
[FILE] rmt [ edit | delete | rename ]
[FILE] rmt-tar [ edit | delete | rename ]
[FILE] rtacct [ edit | delete | rename ]
[FILE] rtcwake [ edit | delete | rename ]
[FILE] rtmon [ edit | delete | rename ]
[FILE] runlevel [ edit | delete | rename ]
[FILE] runuser [ edit | delete | rename ]
[FILE] service [ edit | delete | rename ]
[FILE] setcap [ edit | delete | rename ]
[FILE] sfdisk [ edit | delete | rename ]
[FILE] shadowconfig [ edit | delete | rename ]
[FILE] shutdown [ edit | delete | rename ]
[FILE] sshd [ edit | delete | rename ]
[FILE] start-stop-daemon [ edit | delete | rename ]
[FILE] sudo_logsrvd [ edit | delete | rename ]
[FILE] sudo_sendlog [ edit | delete | rename ]
[FILE] sulogin [ edit | delete | rename ]
[FILE] swaplabel [ edit | delete | rename ]
[FILE] swapoff [ edit | delete | rename ]
[FILE] swapon [ edit | delete | rename ]
[FILE] switch_root [ edit | delete | rename ]
[FILE] sysctl [ edit | delete | rename ]
[FILE] tarcat [ edit | delete | rename ]
[FILE] tc [ edit | delete | rename ]
[FILE] telinit [ edit | delete | rename ]
[FILE] tipc [ edit | delete | rename ]
[FILE] tune2fs [ edit | delete | rename ]
[FILE] tzconfig [ edit | delete | rename ]
[FILE] unix_chkpwd [ edit | delete | rename ]
[FILE] unix_update [ edit | delete | rename ]
[FILE] update-ca-certificates [ edit | delete | rename ]
[FILE] update-passwd [ edit | delete | rename ]
[FILE] update-rc.d [ edit | delete | rename ]
[FILE] update-shells [ edit | delete | rename ]
[FILE] useradd [ edit | delete | rename ]
[FILE] userdel [ edit | delete | rename ]
[FILE] usermod [ edit | delete | rename ]
[FILE] vdpa [ edit | delete | rename ]
[FILE] veritysetup [ edit | delete | rename ]
[FILE] vigr [ edit | delete | rename ]
[FILE] vipw [ edit | delete | rename ]
[FILE] visudo [ edit | delete | rename ]
[FILE] wipefs [ edit | delete | rename ]
[FILE] wpa_action [ edit | delete | rename ]
[FILE] wpa_cli [ edit | delete | rename ]
[FILE] wpa_supplicant [ edit | delete | rename ]
[FILE] xtables-legacy-multi [ edit | delete | rename ]
[FILE] xtables-monitor [ edit | delete | rename ]
[FILE] xtables-nft-multi [ edit | delete | rename ]
[FILE] zic [ edit | delete | rename ]
[FILE] zramctl [ edit | delete | rename ]
Viewing: /snap/core22/2955/usr/sbin/update-shells
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright 2021 Helmut Grohne <helmut@subdivi.de>
# A "hashset" is a shell variable containing a sequence of elements separated
# and surrounded by hash (#) characters. None of the elements may contain a
# hash character. The character is thus chosen, because it initiates a comment
# in /etc/shells. All variables ending in _SHELLS in this file are hashsets.
set -e
# Check whether hashset $1 contains element $2.
hashset_contains() {
case "$1" in
*"#$2#"*) return 0 ;;
*) return 1 ;;
esac
}
log() {
if [ "$VERBOSE" = 1 ]; then
echo "$*"
fi
}
ROOT=
VERBOSE=0
NOACT=0
while [ $# -gt 0 ]; do
case "$1" in
--help)
cat <<EOF
usage: $0 [options]
--no-act Do not move the actual update into place
--verbose Be more verbose
--root DIR Operate on the given chroot, defaults to /
EOF
exit 0
;;
--no-act)
NOACT=1
;;
--root)
shift
if [ "$#" -lt 1 ]; then
echo "missing argument to --root" 1>&2
exit 1
fi
ROOT=$1
;;
--verbose)
VERBOSE=1
;;
*)
echo "unrecognized option $1" 1>&2
exit 1
;;
esac
shift
done
PKG_DIR="$ROOT/usr/share/debianutils/shells.d"
STATE_FILE="$ROOT/var/lib/shells.state"
TARGET_ETC_FILE="$ROOT/etc/shells"
SOURCE_ETC_FILE="$TARGET_ETC_FILE"
NEW_ETC_FILE="$TARGET_ETC_FILE.tmp"
NEW_STATE_FILE="$STATE_FILE.tmp"
if ! test -e "$SOURCE_ETC_FILE"; then
SOURCE_ETC_FILE="$ROOT/usr/share/debianutils/shells"
fi
PKG_SHELLS='#'
LC_COLLATE=C.UTF-8 # glob in reproducible order
for f in "$PKG_DIR/"*; do
[ "$f" = "$PKG_DIR/*" ] && break
while IFS='#' read -r line _; do
[ -n "$line" ] || continue
PKG_SHELLS="$PKG_SHELLS$line#"
realshell=$(dpkg-realpath --root "$ROOT" "$line")
if [ "$line" != "$realshell" ]; then
PKG_SHELLS="$PKG_SHELLS$realshell#"
fi
done < "$f"
done
STATE_SHELLS='#'
if [ -e "$STATE_FILE" ] ; then
while IFS='#' read -r line _; do
[ -n "$line" ] && STATE_SHELLS="$STATE_SHELLS$line#"
done < "$STATE_FILE"
fi
cleanup() {
rm -f "$NEW_ETC_FILE" "$NEW_STATE_FILE"
}
trap cleanup EXIT
: > "$NEW_ETC_FILE"
ETC_SHELLS='#'
while IFS= read -r line; do
shell=${line%%#*}
# copy all comment lines, packaged shells and local additions
if [ -z "$shell" ] ||
hashset_contains "$PKG_SHELLS" "$shell" ||
! hashset_contains "$STATE_SHELLS" "$shell"; then
echo "$line" >> "$NEW_ETC_FILE"
ETC_SHELLS="$ETC_SHELLS$shell#"
else
log "removing shell $shell"
fi
done < "$SOURCE_ETC_FILE"
: > "$NEW_STATE_FILE"
saved_IFS=$IFS
IFS='#'
set -f
# shellcheck disable=SC2086 # word splitting intended, globbing disabled
set -- ${PKG_SHELLS###}
set +f
IFS=$saved_IFS
for shell; do
echo "$shell" >> "$NEW_STATE_FILE"
# add shells that are neither already present nor locally removed
if ! hashset_contains "$ETC_SHELLS" "$shell" &&
! hashset_contains "$STATE_SHELLS" "$shell"; then
echo "$shell" >> "$NEW_ETC_FILE"
log "adding shell $shell"
fi
done
if [ "$NOACT" = 0 ]; then
if [ -e "$STATE_FILE" ]; then
chmod --reference="${STATE_FILE}" "${NEW_STATE_FILE}" || chmod $(stat -c %a "${STATE_FILE}") "${NEW_STATE_FILE}"
chown --reference="${STATE_FILE}" "${NEW_STATE_FILE}" || chown $(stat -c %U "${STATE_FILE}") "${NEW_STATE_FILE}"
else
chmod 0644 "$NEW_STATE_FILE"
fi
chmod --reference="${SOURCE_ETC_FILE}" "${NEW_ETC_FILE}" || chmod $(stat -c %a "${SOURCE_ETC_FILE}") "${NEW_ETC_FILE}"
chown --reference="${SOURCE_ETC_FILE}" "${NEW_ETC_FILE}" || chown $(stat -c %U "${SOURCE_ETC_FILE}") "${NEW_ETC_FILE}"
sync -d "$NEW_ETC_FILE" "$NEW_STATE_FILE"
mv -Z "${NEW_ETC_FILE}" "${TARGET_ETC_FILE}" || mv "${NEW_ETC_FILE}" "${TARGET_ETC_FILE}"
sync "$TARGET_ETC_FILE"
sync "$(dirname "$TARGET_ETC_FILE")"
mv "$NEW_STATE_FILE" "$STATE_FILE"
sync "$STATE_FILE"
sync "$(dirname "$STATE_FILE")"
trap "" EXIT
fi