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Read from `/bin/sh` if `/bin/ls` cannot be found when determing libc path (#1433) 

I'm not sure if we should just switch to _always_ reading from sh
instead? I don't love that all these errors are strings and I if
`/bin/ls` exists but can't be parsed we still won't try `/bin/sh`. We
may want to address these things in the future.

Closes https://github.com/astral-sh/uv/issues/1395
This commit is contained in:
Zanie Blue 2024-02-16 06:51:34 -06:00 committed by GitHub
parent c474370064
commit d99c4cacdf
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1 changed files with 20 additions and 10 deletions
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30
crates/platform-host/src/linux.rs
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@ -127,17 +127,27 @@ fn get_musl_version(ld_path: impl AsRef<Path>) -> std::io::Result<Option<(u16, u
/// Find musl libc path from executable's ELF header.
fn find_libc() -> Result<PathBuf, PlatformError> {
let buffer = fs::read("/bin/ls")?;
let error_str = "Couldn't parse /bin/ls for detecting the ld version";
let elf = Elf::parse(&buffer)
.map_err(|err| PlatformError::OsVersionDetectionError(format!("{error_str}: {err}")))?;
if let Some(elf_interpreter) = elf.interpreter {
Ok(PathBuf::from(elf_interpreter))
} else {
Err(PlatformError::OsVersionDetectionError(
error_str.to_string(),
))
// We'll try to parse the first file we read successfully
for path in ["/bin/ls", "/bin/sh"] {
let Ok(buffer) = fs::read(path) else {
continue;
};
let elf = Elf::parse(&buffer).map_err(|err| {
PlatformError::OsVersionDetectionError(format!(
"Couldn't parse {path} to detect the ld version: {err}"
))
})?;
if let Some(elf_interpreter) = elf.interpreter {
return Ok(PathBuf::from(elf_interpreter));
}
return Err(PlatformError::OsVersionDetectionError(format!(
"Couldn't parse {path} to detect the ld version"
)));
}
Err(PlatformError::OsVersionDetectionError(
"Failed to find binary at `/bin/ls` or `/bin/sh` to read ld version from".to_string(),
))
}
#[cfg(test)]