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sysroot-cleaner
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chore(dso): minor refactor

This commit is contained in:
Matteo Settenvini 2025-01-27 09:56:59 +01:00
parent 2213856c81
commit a05dd7084d
Signed by: matteo
GPG Key ID: 1C1B12600D81DE05
2 changed files with 44 additions and 38 deletions
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2
README.md
View File

@ -5,3 +5,5 @@
# Sysroot Cleaner
A tool to clean up sysroots for Linux embedded devices to save storage space.
Note: it will only work on files belonging to the same filesystem. This is a design choice.

80
src/cleaners/dso.rs
View File

@ -159,44 +159,7 @@ impl DsoCleaner {
fn process_elf_file(state: &mut State, path: &Path, elf: &Elf) -> Result<()> {
log::trace!("dso: adding to graph elf file '{}'", path.display());
let current_dir = std::env::current_dir()?;
let origin = std::fs::canonicalize(path)?
.parent()
.unwrap()
.strip_prefix(current_dir)?
.to_path_buf()
.into_os_string()
.into_string()
.map_err(|s| anyhow::anyhow!("cannot represent {:?} as a UTF-8 string", s))?;
let mut search_paths = vec![];
if elf.rpaths != vec![""] {
if elf.runpaths != vec![""] {
let mut rpaths = elf
.rpaths
.iter()
.map(|p| p.replace("$ORIGIN", &origin))
.collect::<Vec<_>>();
search_paths.append(&mut rpaths);
}
search_paths.append(&mut Self::get_env_library_paths());
}
if elf.runpaths != vec![""] {
let mut runpaths = elf
.runpaths
.iter()
.map(|p| p.replace("$ORIGIN", &origin))
.collect::<Vec<_>>();
search_paths.append(&mut runpaths);
}
// Standard dirs:
search_paths.push("/usr/local/lib".into());
search_paths.push("/lib".into());
search_paths.push("/usr/lib".into());
let search_paths = Self::determine_lib_search_paths(path, elf)?;
let src_stat = nix::sys::stat::stat(path)?;
let src_inode = if elf.is_lib {
@ -233,6 +196,47 @@ impl DsoCleaner {
Ok(())
}
fn determine_lib_search_paths(path: &Path, elf: &Elf<'_>) -> Result<Vec<String>> {
let mut search_paths = vec![];
let current_dir = std::env::current_dir()?;
let origin = std::fs::canonicalize(path)?
.parent()
.unwrap()
.strip_prefix(current_dir)?
.to_path_buf()
.into_os_string()
.into_string()
.map_err(|s| anyhow::anyhow!("cannot represent {:?} as a UTF-8 string", s))?;
if elf.rpaths != vec![""] {
if elf.runpaths != vec![""] {
let mut rpaths = elf
.rpaths
.iter()
.map(|p| p.replace("$ORIGIN", &origin))
.collect::<Vec<_>>();
search_paths.append(&mut rpaths);
}
search_paths.append(&mut Self::get_env_library_paths());
}
if elf.runpaths != vec![""] {
let mut runpaths = elf
.runpaths
.iter()
.map(|p| p.replace("$ORIGIN", &origin))
.collect::<Vec<_>>();
search_paths.append(&mut runpaths);
}
search_paths.push("/usr/local/lib".into());
search_paths.push("/lib".into());
search_paths.push("/usr/lib".into());
Ok(search_paths)
}
fn get_env_library_paths() -> Vec<String> {
let ld_config_path = std::env::var("LD_LIBRARY_PATH");
ld_config_path