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Use libc O_EXLOCK instead of our own

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Rust libc supports O_EXLOCK on supported platforms (BSD/macOS), use that instead
of re-exposing it.
This commit is contained in:
ridiculousfish 2024-01-14 10:35:32 -08:00
parent 2ffec7463e
commit 70ed4806b4
3 changed files with 10 additions and 12 deletions
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13
src/env_universal_common.rs
View file

@ -1,3 +1,5 @@
#![allow(clippy::bad_bit_mask)]
use crate::common::{
read_loop, str2wcstring, timef, unescape_string, valid_var_name, wcs2zstring, write_loop,
UnescapeFlags, UnescapeStringStyle,
@ -7,7 +9,7 @@ use crate::fallback::fish_mkstemp_cloexec;
use crate::fds::AutoCloseFd;
use crate::fds::{open_cloexec, wopen_cloexec};
use crate::flog::{FLOG, FLOGF};
use crate::libc::{C_O_EXLOCK, UVAR_FILE_SET_MTIME_HACK};
use crate::libc::UVAR_FILE_SET_MTIME_HACK;
use crate::path::path_get_config;
use crate::path::{path_get_config_remoteness, DirRemoteness};
use crate::wchar::prelude::*;
@ -28,6 +30,13 @@ use std::mem::MaybeUninit;
use std::os::fd::RawFd;
use std::os::unix::prelude::MetadataExt;
// Pull in the O_EXLOCK constant if it is defined, otherwise set it to 0.
#[cfg(any(bsd, target_os = "macos"))]
use libc::O_EXLOCK;
#[cfg(not(any(bsd, target_os = "macos")))]
const O_EXLOCK: libc::c_int = 0;
/// Callback data, reflecting a change in universal variables.
pub struct CallbackData {
// The name of the variable.
@ -430,8 +439,6 @@ impl EnvUniversal {
let mut locked_by_open = false;
let mut flags = O_RDWR | O_CREAT;
#[allow(non_snake_case)]
let O_EXLOCK = unsafe { C_O_EXLOCK() };
if O_EXLOCK != 0 && self.do_flock {
flags |= O_EXLOCK;
locked_by_open = true;

8
src/libc.c
View file

@ -64,14 +64,6 @@ int C_PC_CASE_SENSITIVE() {
FILE* stdout_stream() { return stdout; }
int C_O_EXLOCK() {
#ifdef O_EXLOCK
return O_EXLOCK;
#else
return 0;
#endif
}
static const bool uvar_file_set_mtime_hack =
#ifdef UVAR_FILE_SET_MTIME_HACK
true;

1
src/libc.rs
View file

@ -47,7 +47,6 @@ extern "C" {
buf: *mut libc::c_char,
len: libc::size_t,
) -> libc::size_t;
pub fn C_O_EXLOCK() -> c_int;
pub fn stdout_stream() -> *mut libc::FILE;
pub fn UVAR_FILE_SET_MTIME_HACK() -> bool;
pub fn setlinebuf(stream: *mut libc::FILE);