diff options
Diffstat (limited to 'udev-bugs/sys-fs/udev/files/seq_node.sh')
-rwxr-xr-x | udev-bugs/sys-fs/udev/files/seq_node.sh | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/udev-bugs/sys-fs/udev/files/seq_node.sh b/udev-bugs/sys-fs/udev/files/seq_node.sh new file mode 100755 index 0000000..93a6ed9 --- /dev/null +++ b/udev-bugs/sys-fs/udev/files/seq_node.sh @@ -0,0 +1,67 @@ +#!/bin/bash +# Copyright 1999-2006 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 +# Author: Martin Schlemmer <azarah@gentoo.org> +# $Header: /var/cvsroot/gentoo-x86/sys-fs/udev/files/seq_node.sh,v 1.2 2006/07/05 09:06:06 azarah Exp $ + +# Stupid little script to emulate the depriciated '%e' directive of udev. +# I am not sure why its supposidly broken, so this might need fixing if it +# have the same issue as '%e'. +# +# Usage: seq_node.sh <root> <kernel name> <wanted node> +# +# root - root of udev (usuall /dev) +# kernel name - kernel name for device +# wanted node - needed free node +# +# Example: seq_node.sh %r %k cdrom +# +# If called as above, it should return 'cdrom' if free, else 'cdrom1', +# 'cdrom2', etc. It also checks if an existing node was already created for +# the specific 'kernel name'. +# + +root=$1 +kname=$2 +node=$3 + +count=0 +new_node=${node} + +if [[ -z ${root} || -z ${kname} || -z ${node} ]] ; then + exit 1 +fi + +get_filename() { + local symlink=$1 + local filename= + + if [[ ! -L ${root}/${symlink} ]] ; then + echo "${symlink}" + return 0 + fi + + if type -p readlink &>/dev/null ; then + filename=$(readlink "${root}/${symlink}") + else + filename=$(perl -e "print readlink(\"${root}/${symlink}\")" 2>/dev/null) + fi + + echo "${filename}" +} + +while [[ -e "${root}/${new_node}" || -L "${root}/${new_node}" ]] ; do + # Check if existing node is the same as the kname we are looking + # for a new node, and return that instead + if [[ $(get_filename "${new_node}") == "${kname}" ]] ; then + break + fi + + let "count += 1" + new_node="${node}${count}" +done + +echo "${new_node}" + +exit 0 + |