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contrib: dracut: zfs-lib: simplify ask_for_password

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The only user is mount-zfs.sh (non-systemd systems),
so reduce it to what it needs

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13291
This commit is contained in:
наб 2022-04-04 22:57:35 +02:00 committed by Brian Behlendorf
parent fec2c613a4
commit 5d31169d7c
2 changed files with 13 additions and 50 deletions
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6
contrib/dracut/90zfs/mount-zfs.sh.in
View File

@ -56,9 +56,9 @@ if import_pool "${ZFS_POOL}" ; then
if [ "$KEYSTATUS" = "unavailable" ]; then
# decrypt them
ask_for_password \
--tries 5 \
--prompt "Encrypted ZFS password for ${ENCRYPTIONROOT}: " \
--cmd "zfs load-key '${ENCRYPTIONROOT}'"
5 \
"Encrypted ZFS password for ${ENCRYPTIONROOT}: " \
"zfs load-key '${ENCRYPTIONROOT}'"
fi
fi
fi

57
contrib/dracut/90zfs/zfs-lib.sh.in
View File

@ -122,44 +122,14 @@ for_relevant_root_children() {
)
}
# ask_for_password
# ask_for_password tries prompt cmd
#
# Wraps around plymouth ask-for-password and adds fallback to tty password ask
# if plymouth is not present.
#
# --cmd command
# Command to execute. Required.
# --prompt prompt
# Password prompt. Note that function already adds ':' at the end.
# Recommended.
# --tries n
# How many times repeat command on its failure. Default is 3.
# --ply-[cmd|prompt|tries]
# Command/prompt/tries specific for plymouth password ask only.
# --tty-[cmd|prompt|tries]
# Command/prompt/tries specific for tty password ask only.
# --tty-echo-off
# Turn off input echo before tty command is executed and turn on after.
# It's useful when password is read from stdin.
ask_for_password() {
ply_tries=3
tty_tries=3
while [ "$#" -gt 0 ]; do
case "$1" in
--cmd) ply_cmd="$2"; tty_cmd="$2"; shift;;
--ply-cmd) ply_cmd="$2"; shift;;
--tty-cmd) tty_cmd="$2"; shift;;
--prompt) ply_prompt="$2"; tty_prompt="$2"; shift;;
--ply-prompt) ply_prompt="$2"; shift;;
--tty-prompt) tty_prompt="$2"; shift;;
--tries) ply_tries="$2"; tty_tries="$2"; shift;;
--ply-tries) ply_tries="$2"; shift;;
--tty-tries) tty_tries="$2"; shift;;
--tty-echo-off) tty_echo_off=yes;;
*) echo "ask_for_password(): wrong opt '$1'" >&2;;
esac
shift
done
tries="$1"
prompt="$2"
cmd="$3"
{
flock -s 9
@ -167,26 +137,19 @@ ask_for_password() {
# Prompt for password with plymouth, if installed and running.
if plymouth --ping 2>/dev/null; then
plymouth ask-for-password \
--prompt "$ply_prompt" --number-of-tries="$ply_tries" | \
eval "$ply_cmd"
--prompt "$prompt" --number-of-tries="$tries" | \
eval "$cmd"
ret=$?
else
if [ "$tty_echo_off" = yes ]; then
stty_orig="$(stty -g)"
stty -echo
fi
i=1
while [ "$i" -le "$tty_tries" ]; do
[ -n "$tty_prompt" ] && \
printf "%s [%i/%i]:" "$tty_prompt" "$i" "$tty_tries" >&2
eval "$tty_cmd" && ret=0 && break
while [ "$i" -le "$tries" ]; do
printf "%s [%i/%i]:" "$prompt" "$i" "$tries" >&2
eval "$cmd" && ret=0 && break
ret=$?
i=$((i+1))
[ -n "$tty_prompt" ] && printf '\n' >&2
printf '\n' >&2
done
unset i
[ "$tty_echo_off" = yes ] && stty "$stty_orig"
fi
} 9>/.console_lock