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perf: use nix::sys::utsname::uname for less syscalls (#2)
Instead of reading multiple files to get the `sysname`, `release`, and `machine` name, use the `nix::sys::utsname::uname` function which sends a single uname syscall instead. This increases performance and portability. From my observations, there are ~10 less syscalls.
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2 changed files with 10 additions and 25 deletions
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@ -4,7 +4,7 @@ version = "0.3.3"
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edition = "2021"
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[dependencies]
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nix = {version = "0.29", features = ["fs", "hostname"]}
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nix = { version = "0.29", features = ["fs", "hostname", "feature"] }
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color-eyre = { version = "0.6", default-features = false }
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[profile.dev]
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@ -1,30 +1,15 @@
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use color_eyre::Result;
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use std::fs::{self, read_to_string};
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use std::fs::read_to_string;
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use std::io;
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// Try to detect OS type as accurately as possible and without depending on uname.
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// /etc/os-release should generally imply Linux, and /etc/bsd-release would imply BSD system.
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fn detect_os() -> Result<&'static str, io::Error> {
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if fs::metadata("/etc/os-release").is_ok() || fs::metadata("/usr/lib/os-release").is_ok() {
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Ok("Linux")
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} else if fs::metadata("/etc/rc.conf").is_ok() || fs::metadata("/etc/bsd-release").is_ok() {
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Ok("BSD")
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} else {
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Ok("Unknown")
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}
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}
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pub fn get_system_info() -> Result<String, io::Error> {
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let system = detect_os()?;
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let kernel_release = read_to_string("/proc/sys/kernel/osrelease")?;
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let kernel_release = kernel_release.trim();
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let architecture = read_to_string("/proc/sys/kernel/arch")?;
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let architecture = architecture.trim();
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let result = format!("{system} {kernel_release} ({architecture})");
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Ok(result)
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pub fn get_system_info() -> nix::Result<String> {
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let utsname = nix::sys::utsname::uname()?;
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Ok(format!(
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"{} {} ({})",
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utsname.sysname().to_str().unwrap_or("Unknown"),
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utsname.release().to_str().unwrap_or("Unknown"),
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utsname.machine().to_str().unwrap_or("Unknown")
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))
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}
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pub fn get_os_pretty_name() -> Result<String, io::Error> {
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