diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common | 252 |
1 files changed, 252 insertions, 0 deletions
@@ -0,0 +1,252 @@ +# generated from util-linux source: libmount/src/utils.c +declare -A pseudofs_types=([anon_inodefs]=1 + [autofs]=1 + [bdev]=1 + [binfmt_misc]=1 + [cgroup]=1 + [cgroup2]=1 + [configfs]=1 + [cpuset]=1 + [debugfs]=1 + [devfs]=1 + [devpts]=1 + [devtmpfs]=1 + [dlmfs]=1 + [fuse.gvfs-fuse-daemon]=1 + [fusectl]=1 + [hugetlbfs]=1 + [mqueue]=1 + [nfsd]=1 + [none]=1 + [pipefs]=1 + [proc]=1 + [pstore]=1 + [ramfs]=1 + [rootfs]=1 + [rpc_pipefs]=1 + [securityfs]=1 + [sockfs]=1 + [spufs]=1 + [sysfs]=1 + [tmpfs]=1) + +# generated from: pkgfile -vbr '/fsck\..+' | awk -F. '{ print $NF }' | sort +declare -A fsck_types=([cramfs]=1 + [exfat]=1 + [ext2]=1 + [ext3]=1 + [ext4]=1 + [ext4dev]=1 + [jfs]=1 + [minix]=1 + [msdos]=1 + [reiserfs]=1 + [vfat]=1 + [xfs]=1) + +out() { printf "$1 $2\n" "${@:3}"; } +error() { out "==> ERROR:" "$@"; } >&2 +msg() { out "==>" "$@"; } +msg2() { out " ->" "$@";} +die() { error "$@"; exit 1; } + +ignore_error() { + "$@" 2>/dev/null + return 0 +} + +in_array() { + local i + for i in "${@:2}"; do + [[ $1 = "$i" ]] && return 0 + done + return 1 +} + +chroot_add_mount() { + mount "$@" && CHROOT_ACTIVE_MOUNTS=("$2" "${CHROOT_ACTIVE_MOUNTS[@]}") +} + +chroot_maybe_add_mount() { + local cond=$1; shift + if eval "$cond"; then + chroot_add_mount "$@" + fi +} + +chroot_setup() { + CHROOT_ACTIVE_MOUNTS=() + [[ $(trap -p EXIT) ]] && die '(BUG): attempting to overwrite existing EXIT trap' + trap 'chroot_teardown' EXIT + + chroot_add_mount proc "$1/proc" -t proc -o nosuid,noexec,nodev && + chroot_add_mount sys "$1/sys" -t sysfs -o nosuid,noexec,nodev,ro && + ignore_error chroot_maybe_add_mount "[[ -d '$1/sys/firmware/efi/efivars' ]]" \ + efivarfs "$1/sys/firmware/efi/efivars" -t efivarfs -o nosuid,noexec,nodev && + chroot_add_mount udev "$1/dev" -t devtmpfs -o mode=0755,nosuid && + chroot_add_mount devpts "$1/dev/pts" -t devpts -o mode=0620,gid=5,nosuid,noexec && + chroot_add_mount shm "$1/dev/shm" -t tmpfs -o mode=1777,nosuid,nodev && + chroot_add_mount run "$1/run" -t tmpfs -o nosuid,nodev,mode=0755 && + chroot_add_mount tmp "$1/tmp" -t tmpfs -o mode=1777,strictatime,nodev,nosuid +} + +chroot_teardown() { + umount "${CHROOT_ACTIVE_MOUNTS[@]}" + unset CHROOT_ACTIVE_MOUNTS +} + +try_cast() ( + _=$(( $1#$2 )) +) 2>/dev/null + +valid_number_of_base() { + local base=$1 len=${#2} i= + + for (( i = 0; i < len; i++ )); do + try_cast "$base" "${2:i:1}" || return 1 + done + + return 0 +} + +mangle() { + local i= chr= out= + local {a..f}= {A..F}= + + for (( i = 0; i < ${#1}; i++ )); do + chr=${1:i:1} + case $chr in + [[:space:]\\]) + printf -v chr '%03o' "'$chr" + out+=\\ + ;; + esac + out+=$chr + done + + printf '%s' "$out" +} + +unmangle() { + local i= chr= out= len=$(( ${#1} - 4 )) + local {a..f}= {A..F}= + + for (( i = 0; i < len; i++ )); do + chr=${1:i:1} + case $chr in + \\) + if valid_number_of_base 8 "${1:i+1:3}" || + valid_number_of_base 16 "${1:i+1:3}"; then + printf -v chr '%b' "${1:i:4}" + (( i += 3 )) + fi + ;; + esac + out+=$chr + done + + printf '%s' "$out${1:i}" +} + +optstring_match_option() { + local candidate pat patterns + + IFS=, read -ra patterns <<<"$1" + for pat in "${patterns[@]}"; do + if [[ $pat = *=* ]]; then + # "key=val" will only ever match "key=val" + candidate=$2 + else + # "key" will match "key", but also "key=anyval" + candidate=${2%%=*} + fi + + [[ $pat = "$candidate" ]] && return 0 + done + + return 1 +} + +optstring_remove_option() { + local o options_ remove=$2 IFS=, + + read -ra options_ <<<"${!1}" + + for o in "${!options_[@]}"; do + optstring_match_option "$remove" "${options_[o]}" && unset 'options_[o]' + done + + declare -g "$1=${options_[*]}" +} + +optstring_normalize() { + local o options_ norm IFS=, + + read -ra options_ <<<"${!1}" + + # remove empty fields + for o in "${options_[@]}"; do + [[ $o ]] && norm+=("$o") + done + + # avoid empty strings, reset to "defaults" + declare -g "$1=${norm[*]:-defaults}" +} + +optstring_append_option() { + if ! optstring_has_option "$1" "$2"; then + declare -g "$1=${!1},$2" + fi + + optstring_normalize "$1" +} + +optstring_prepend_option() { + local options_=$1 + + if ! optstring_has_option "$1" "$2"; then + declare -g "$1=$2,${!1}" + fi + + optstring_normalize "$1" +} + +optstring_get_option() { + local opts o + + IFS=, read -ra opts <<<"${!1}" + for o in "${opts[@]}"; do + if optstring_match_option "$2" "$o"; then + declare -g "$o" + return 0 + fi + done + + return 1 +} + +optstring_has_option() { + local "${2%%=*}" + + optstring_get_option "$1" "$2" +} + +dm_name_for_devnode() { + read dm_name <"/sys/class/block/${1#/dev/}/dm/name" + if [[ $dm_name ]]; then + printf '/dev/mapper/%s' "$dm_name" + else + # don't leave the caller hanging, just print the original name + # along with the failure. + print '%s' "$1" + error 'Failed to resolve device mapper name for: %s' "$1" + fi +} + +fstype_is_pseudofs() { + (( pseudofs_types["$1"] )) +} + +fstype_has_fsck() { + (( fsck_types["$1"] )) +} |