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#!/bin/sh                                               
# Add a new .gnupg home directory for a list of users         -*- sh -*-
#
# Copyright 2004 Free Software Foundation, Inc.
#
# This file is free software; as a special exception the author gives
# unlimited permission to copy and/or distribute it, with or without
# modifications, as long as this notice is preserved.
#
# This file is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

PGM=addgnupghome
any_error=0

error () {
  echo "$PGM: $*" >&2
  any_error=1
}

info () {
  echo "$PGM: $*" >&2
}

# Do it for one user
one_user () {
    user="$1"
    home=$(${cat_passwd} | awk -F: -v n="$user" '$1 == n {print $6}')
    if [ -z "$home" ]; then
        if ${cat_passwd} | awk -F: -v n="$user" '$1 == n {exit 1}'; then
            error "no such user \`$user'"
        else
            error "no home directory for user \`$user'"
        fi
        return
    fi
    if [ ! -d "$home" ]; then
        error "home directory \`$home' of user \`$user' does not exist"
        return
    fi
    if [ -d "$home/.gnupg" ]; then
        info "skipping user \`$user': \`.gnupg' already exists"
        return
    fi
    info "creating home directory \`$home/.gnupg' for \`$user'"
    if ! mkdir "$home/.gnupg" ; then
        error "error creating \`$home/.gnupg'"
        return
    fi

if ! chown $user "$home/.gnupg" ; then
        error "error changing ownership of \`$home/.gnupg'"
        return
    fi

group=$(id -g "$user")
    [ -z "$group" ] && group="0"

if [ "$group" -gt 0 ]; then
        if ! chgrp $group "$home/.gnupg" ; then
            error "error changing group of \`$home/.gnupg'"
            return
        fi
    fi

if ! cd "$home/.gnupg" ; then
        error "error cd-ing to \`$home/.gnupg'"
        return
    fi
    for f in $filelist; do
        if [ -d /etc/skel/.gnupg/$f ]; then
            mkdir $f
        else
            cp /etc/skel/.gnupg/$f $f
        fi
        if ! chown $user $f ; then
            error "error changing ownership of \`$f'"
            return
        fi
        if [ "$group" -gt 0 ]; then
            if ! chgrp $group "$f" ; then
                error "error changing group of \`$f'"
                return
            fi
        fi
    done

}

if [ -z "$1" ]; then 
    echo "usage: $PGM userids"
    exit 1
fi

# Check whether we can use getent
if getent --help </dev/null >/dev/null 2>&1 ; then
    cat_passwd='getent passwd'
else
    cat_passwd='cat /etc/passwd'
    info "please note that only users from /etc/passwd are checked"
fi

if [ ! -d /etc/skel/.gnupg ]; then
    error "skeleton directory \`/etc/skel/.gnupg' does not exist"
    exit 1
fi
cd "/etc/skel/.gnupg" || (error "error cd-ing to \`/etc/skel/.gnupg'"; exit 1)
filelist=$(find . $ -type f -or -type d $ -not -name '*~' -not -name . -print)

if ! umask 0077 ; then
    error "error setting umask"
    exit 1
fi

for name in $*; do
    one_user $name
done

exit $any_error