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sys: Use safe wrapper for libc::isatty

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Use the `std::io::IsTerminal` trait introduced in Rust 1.70.

Internally it calls `libc::isatty`, see [1, 2]. Note that it switches
the comparison from `== 1` to `!= 0` which shouldn't make a difference
assuming that libc::isatty upholds the promises made in its man page.

The MSRV was set on the workspace to reflect this change.

[1] https://doc.rust-lang.org/src/std/io/stdio.rs.html#1079
[2] https://doc.rust-lang.org/src/std/sys/unix/io.rs.html#79

Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
This commit is contained in:
Maximiliano Sandoval R 2024-02-16 15:59:00 +01:00 committed by Dietmar Maurer
parent 7126249102
commit 430df21720
2 changed files with 10 additions and 13 deletions
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1
Cargo.toml
View File

@ -44,6 +44,7 @@ license = "AGPL-3"
repository = "https://git.proxmox.com/?p=proxmox.git"
homepage = "https://proxmox.com"
exclude = [ "debian" ]
rust-version = "1.70"
[workspace.dependencies]
# any features enabled here are enabled on all members using 'workspace = true'!

22
proxmox-sys/src/linux/tty.rs
View File

@ -1,4 +1,4 @@
use std::io::{self, Read, Write};
use std::io::{self, IsTerminal, Read, Write};
use std::mem::MaybeUninit;
use std::os::unix::io::{AsRawFd, OwnedFd};
@ -25,20 +25,16 @@ pub fn stdout_terminal_size() -> (usize, usize) {
(winsize.ws_row as usize, winsize.ws_col as usize)
}
/// Returns whether the current stdout is a tty .
/// # Safety
///
/// uses unsafe call to libc::isatty
/// Returns whether the current stdout is a tty.
#[deprecated(note = "Use std::io::stdout().is_terminal()")]
pub fn stdout_isatty() -> bool {
unsafe { libc::isatty(std::io::stdin().as_raw_fd()) == 1 }
std::io::stdout().is_terminal()
}
/// Returns whether the current stdin is a tty .
/// # Safety
///
/// uses unsafe call to libc::isatty
/// Returns whether the current stdin is a tty.
#[deprecated(note = "Use std::io::stdin().is_terminal()")]
pub fn stdin_isatty() -> bool {
unsafe { libc::isatty(std::io::stdin().as_raw_fd()) == 1 }
std::io::stdin().is_terminal()
}
pub enum TtyOutput {
@ -75,7 +71,7 @@ impl TtyOutput {
/// Get an output file descriptor for the current terminal.
pub fn open() -> io::Result<Option<Self>> {
let stdout = std::io::stdout();
if unsafe { libc::isatty(stdout.as_raw_fd()) } == 1 {
if stdout.is_terminal() {
Ok(Some(TtyOutput::Stdout(stdout)))
} else {
match crate::fd::open(
@ -97,7 +93,7 @@ impl TtyOutput {
/// first.
pub fn read_password(query: &str) -> Result<Vec<u8>, Error> {
let input = std::io::stdin();
if unsafe { libc::isatty(input.as_raw_fd()) } != 1 {
if !input.is_terminal() {
let mut out = String::new();
input.read_line(&mut out)?;
return Ok(out.into_bytes());