# $NetBSD: usergroupfuncs.MirBSD,v 1.1 2012/06/19 05:43:24 bsiegert Exp $
#
# Platform-specific adduser and addgroup functionality.

# group_exists group [groupid]
#	Returns 0 if $group exists and has gid $groupid
#	Returns 1 if neither $group nor $groupid exist
#	Returns 2 if $group or $groupid exist but don't match
#	Returns 3 for all errors
#
group_exists()
{
	_group="$1"; _groupid="$2"
	${TEST} -n "$_group" || return 3

	if ${TEST} -n "$_groupid"; then
		${AWK} -F : "BEGIN { rv=1 }; \$1 == \"$_group\" { if (\$3 == $_groupid) rv=0; else rv=2 }; END { exit rv }" /etc/group
	else
		${AWK} -F : "\$1 == \"$_group\" || \$3 == \"$_group\" { found=1 }; END { if (!found) exit 1 }" /etc/group
	fi
}

# user_exists user [userid]
#	Returns 0 if $user exists and has uid $userid
#	Returns 1 if neither $user nor $userid exist
#	Returns 2 if $user or $userid exist but don't match
#	Returns 3 for all errors
#
user_exists()
{
	_user="$1"; _userid="$2"
	${TEST} -n "$_user" || return 3

	if ${TEST} -n "$_userid"; then
		${AWK} -F : "BEGIN { rv=1 }; \$1 == \"$_user\" { if (\$3 == $_userid) rv=0; else rv=2 }; END { exit rv }" /etc/passwd
	else
		${AWK} -F : "\$1 == \"$_user\" || \$3 == \"$_user\" { found=1 }; END { if (!found) exit 1 }" /etc/passwd
	fi
}

# first_free_uid
#	prints the lowest free uid
first_free_uid()
{
	integer uid=700
	while :; do
		user_exists $uid
		if (( $? == 1 )); then
			break
		fi
		let uid++
	done
	${ECHO} $uid
}

# first_free_gid
#	prints the lowest free gid
first_free_gid()
{
	integer gid=700
	while :; do
		group_exists $gid
		if (( $? == 1 )); then
			break
		fi
		let gid++
	done
	${ECHO} $gid
}

# adduser user group [userid] [descr] [home] [shell]
adduser()
{
	user="$1"; group="$2"; userid="$3"
	descr="$4"; home="$5" shell="$6"
	#${TEST} $# -eq 6 || return 1
	${TEST} -n "$user" || return 2
	${TEST} -n "$group" || return 2

	case $user in
	${PKGNAME%-[0-9]*})	descr_dflt="pkgsrc -- $user user" ;;
	*)			descr_dflt="pkgsrc -- ${PKGNAME%-[0-9]*} $user user" ;;
	esac
	: ${descr:="$descr_dflt"}
	: ${home:="@PKG_USER_HOME@"}
	: ${shell:="@PKG_USER_SHELL@"}

	if ${TEST} "$group" -gt 0; then
		# numerical gid
		gid=$group
	else
		if group_exists "$group"; then
			gid=$(awk -F : "\$1 == \"$group\" { print \$3 }" /etc/group)
		else
			gid=$(first_free_gid)
			addgroup "$group" $gid
		fi
	fi
	if ${TEST} -z "$userid"; then
		userid=$(first_free_uid)
	fi

	${ECHO} "${PKGNAME}: Creating user \`\`$user'' ($userid)"
	set -e
	P=$(mktemp /etc/pwd.tmp.XXXXXXXXXX)
	trap 'rm -f $P; exit 1' 1 2 3 5 13 15
	${CHOWN} root:wheel $P
	${CHMOD} 600 $P
	${ECHO} "$user:*:$userid:$gid::0:0:$descr:$home:$shell" >>$P
	${CAT} /etc/master.passwd >>$P
	${SORT} -t: -nk3 -o $P $P
	${MV} /etc/master.passwd /etc/master.passwd.bak
	${MV} $P /etc/master.passwd
	${CHOWN} root:wheel /etc/master.passwd
	${CHMOD} 600 /etc/master.passwd
	${RM} -f /etc/master.passwd.bak
	pwd_mkdb -p /etc/master.passwd
	set +e

	return 0
}

# addgroup group [groupid]
addgroup()
{
	group="$1"; groupid="$2"
	${TEST} $# -gt 1 || return 1
	${TEST} -n "$group" || return 2
	
	if ${TEST} -z "$groupid"; then
		groupid=$(first_free_gid)
	fi

	${ECHO} "${PKGNAME}: Creating group \`\`$group'' ($groupid)"
	set -e
	T=$(mktemp /etc/pwd.tmp.XXXXXXXXXX)
	trap 'rm -f $T; exit 1' 1 2 3 5 13 15
	${ECHO} "$group:*:$groupid:" >$T
	${CHOWN} root:wheel $T
	${CHMOD} 644 $T
	${CAT} /etc/group >>$T
	${SORT} -t: -nk3 -uo $T $T
	${MV} /etc/group /etc/group.bak
	${MV} $T /etc/group
	${RM} -f /etc/group.bak
	pwd_mkdb -p /etc/master.passwd
	set +e

	return 0
}