52 lines
1.3 KiB
Rust
52 lines
1.3 KiB
Rust
use std::fs;
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use std::os::unix::fs::MetadataExt;
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use std::path::Path;
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/// Reads the file and strips whitespace (including newlines)
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/// Useful for file-based key-value store
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pub fn read_or_none(path: &Path) -> Option<String> {
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if !path.is_file() {
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return None;
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}
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match fs::read_to_string(path) {
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Ok(content) => {
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// Remove trailing space/newlines
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Some(content.trim().to_string())
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}
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Err(e) => {
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eprintln!("IO ERROR: {}", e);
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None
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}
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}
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}
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pub fn read_extension(path: &Path, setting: &str) -> Option<String> {
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let mut path = path.to_path_buf();
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path.set_extension(setting);
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read_or_none(&path)
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}
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/// Returns true when the file exists and has user exec
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/// permission. Returns false otherwise.
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pub fn is_executable(path: &Path) -> bool {
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// Do not match directories
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if !path.is_file() {
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return false;
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}
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match fs::metadata(path) {
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Ok(stat) => {
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let mode = stat.mode();
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// Check user exec permission)
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if (mode & 0o100) == 0o100 {
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true
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} else {
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false
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}
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}
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Err(e) => {
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eprintln!("IO Error: {}", e);
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false
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}
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}
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}
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