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//proc/self/root/etc/profile.d/Z99-cloud-locale-test.sh

#!/bin/sh
# Copyright (C) 2012, Canonical Group, Ltd.
#
# Author: Ben Howard <ben.howard@canonical.com>
# Author: Scott Moser <scott.moser@ubuntu.com>
# (c) 2012, Canonical Group, Ltd.
#
# This file is part of cloud-init. See LICENSE file for license information.
 
# Purpose: Detect invalid locale settings and inform the user
#  of how to fix them.

locale_warn() {
    command -v local >/dev/null && local _local="local" ||
        typeset _local="typeset"

$_local bad_names="" bad_lcs="" key="" val="" var="" vars="" bad_kv=""
    $_local w1 w2 w3 w4 remain

# if shell is zsh, act like sh only for this function (-L).
    # The behavior change will not permenently affect user's shell.
    [ "${ZSH_NAME+zsh}" = "zsh" ] && emulate -L sh

# locale is expected to output either:
    # VARIABLE=
    # VARIABLE="value"
    # locale: Cannot set LC_SOMETHING to default locale
    while read -r w1 w2 w3 w4 remain; do
        case "$w1" in
            locale:) bad_names="${bad_names} ${w4}";;
            *)
                key=${w1%%=*}
                val=${w1#*=}
                val=${val#\"}
                val=${val%\"}
                vars="${vars} $key=$val";;
        esac
    done
    for bad in $bad_names; do
        for var in ${vars}; do
            [ "${bad}" = "${var%=*}" ] || continue
            val=${var#*=}
            [ "${bad_lcs#* ${val}}" = "${bad_lcs}" ] &&
                bad_lcs="${bad_lcs} ${val}"
            bad_kv="${bad_kv} $bad=$val"
            break
        done
    done
    bad_lcs=${bad_lcs# }
    bad_kv=${bad_kv# }
    [ -n "$bad_lcs" ] || return 0

printf "_____________________________________________________________________\n"
    printf "WARNING! Your environment specifies an invalid locale.\n"
    printf " The unknown environment variables are:\n   %s\n" "$bad_kv"
    printf " This can affect your user experience significantly, including the\n"
    printf " ability to manage packages. You may install the locales by running:\n\n"

printf " sudo dpkg-reconfigure locales\n\n"
    printf " and select the missing language. Alternatively, you can install the\n"
    printf " locales-all package:\n\n"
    printf " sudo apt-get install locales-all\n\n"
    printf "To disable this message for all users, run:\n"
    printf "   sudo touch /var/lib/cloud/instance/locale-check.skip\n"
    printf "_____________________________________________________________________\n\n"

# only show the message once
    : > ~/.cloud-locale-test.skip 2>/dev/null || :
}

[ -f ~/.cloud-locale-test.skip -o -f /var/lib/cloud/instance/locale-check.skip ] ||
    locale 2>&1 | locale_warn

unset locale_warn
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