From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- testing/mozbase/rust/mozrunner/src/path.rs | 48 ++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 testing/mozbase/rust/mozrunner/src/path.rs (limited to 'testing/mozbase/rust/mozrunner/src/path.rs') diff --git a/testing/mozbase/rust/mozrunner/src/path.rs b/testing/mozbase/rust/mozrunner/src/path.rs new file mode 100644 index 0000000000..0bf1eda9ed --- /dev/null +++ b/testing/mozbase/rust/mozrunner/src/path.rs @@ -0,0 +1,48 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +//! Provides utilities for searching the system path. + +use std::env; +use std::path::{Path, PathBuf}; + +#[cfg(unix)] +fn is_executable(path: &Path) -> bool { + use std::fs; + use std::os::unix::fs::PermissionsExt; + + // Permissions are a set of four 4-bit bitflags, represented by a single octal + // digit. The lowest bit of each of the last three values represents the + // executable permission for all, group and user, repsectively. We assume the + // file is executable if any of these are set. + match fs::metadata(path).ok() { + Some(meta) => meta.permissions().mode() & 0o111 != 0, + None => false, + } +} + +#[cfg(not(unix))] +fn is_executable(_: &Path) -> bool { + true +} + +/// Determines if the path is an executable binary. That is, if it exists, is +/// a file, and is executable where applicable. +pub fn is_binary(path: &Path) -> bool { + path.exists() && path.is_file() && is_executable(path) +} + +/// Searches the system path (`PATH`) for an executable binary and returns the +/// first match, or `None` if not found. +pub fn find_binary(binary_name: &str) -> Option { + env::var_os("PATH").and_then(|path_env| { + for mut path in env::split_paths(&path_env) { + path.push(binary_name); + if is_binary(&path) { + return Some(path); + } + } + None + }) +} -- cgit v1.2.3