| // Copyright 2019 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| use std::fs::File; |
| use std::io::BufRead; |
| use std::io::BufReader; |
| |
| use crate::fdt::{Error, FdtWriter, Result}; |
| |
| fn parse_fstab_line(line: &str) -> Result<Vec<String>> { |
| let vec: Vec<&str> = line.split_whitespace().collect(); |
| if vec.len() != 5 { |
| return Err(Error::FdtFileParseError); |
| } |
| Ok(vec.iter().map(|s| s.to_string()).collect()) |
| } |
| |
| /// Creates a flattened device tree containing all of the parameters used |
| /// by Android. |
| /// |
| /// # Arguments |
| /// |
| /// * `fdt` - The DTB to modify. The top-most node should be open. |
| /// * `android-fstab` - A text file of Android fstab entries to add to the DTB |
| pub fn create_android_fdt(fdt: &mut FdtWriter, fstab: File) -> Result<()> { |
| let vecs = BufReader::new(fstab) |
| .lines() |
| .map(|l| parse_fstab_line(&l.map_err(Error::FdtIoError)?)) |
| .collect::<Result<Vec<Vec<String>>>>()?; |
| let firmware_node = fdt.begin_node("firmware")?; |
| let android_node = fdt.begin_node("android")?; |
| fdt.property_string("compatible", "android,firmware")?; |
| |
| let (dtprop, fstab): (_, Vec<_>) = vecs.into_iter().partition(|x| x[0] == "#dt-vendor"); |
| let vendor_node = fdt.begin_node("vendor")?; |
| for vec in dtprop { |
| let content = std::fs::read_to_string(&vec[2]).map_err(Error::FdtIoError)?; |
| fdt.property_string(&vec[1], &content)?; |
| } |
| fdt.end_node(vendor_node)?; |
| let fstab_node = fdt.begin_node("fstab")?; |
| fdt.property_string("compatible", "android,fstab")?; |
| for vec in fstab { |
| let partition = &vec[1][1..]; |
| let partition_node = fdt.begin_node(partition)?; |
| fdt.property_string("compatible", &("android,".to_owned() + partition))?; |
| fdt.property_string("dev", &vec[0])?; |
| fdt.property_string("type", &vec[2])?; |
| fdt.property_string("mnt_flags", &vec[3])?; |
| fdt.property_string("fsmgr_flags", &vec[4])?; |
| fdt.end_node(partition_node)?; |
| } |
| fdt.end_node(fstab_node)?; |
| fdt.end_node(android_node)?; |
| fdt.end_node(firmware_node)?; |
| Ok(()) |
| } |