编辑文件 - cryptdisks

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路径: /sbin/cryptdisks_start
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#!/bin/sh

# cryptdisks_start - wrapper around cryptsetup which parses
# /etc/crypttab, just like mount parses /etc/fstab.

# Initial code and (c) 2007 Jon Dowland <jon@alcopop.org>
# License: GNU General Public License, v2 or any later
# (https://www.gnu.org/copyleft/gpl.html)

set -e

if [ $# -lt 1 ]; then
	echo "usage: $0 <name>" >&2
	echo >&2
	echo "reads /etc/crypttab and starts the mapping corresponding to <name>" >&2
	exit 1
fi

. /lib/cryptsetup/cryptdisks.functions

INITSTATE="manual"
DEFAULT_LOUD="yes"

if [ -x "/usr/bin/id" ] && [ "$(/usr/bin/id -u)"  != "0" ]; then
	log_warning_msg "$0 needs root privileges"
	exit 1
fi

log_action_begin_msg "Starting crypto disk"
mount_fs

count=0
tablen="$(egrep -vc "^[[:space:]]*(#|$)" "$TABFILE")"
egrep -v "^[[:space:]]*(#|$)" "$TABFILE" | while read dst src key opts; do
	count=$(( $count + 1 ))
	if [ "$1" = "$dst" ]; then
		ret=0
		handle_crypttab_line_start "$dst" "$src" "$key" "$opts" <&3 || ret=$?
	elif [ $count -ge $tablen ]; then
		ret=1
		device_msg "$1" "failed, not found in crypttab"
	else
		continue
	fi
	umount_fs
	log_action_end_msg $ret
	exit $ret
done 3<&1

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