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Use open instead of open64 (#326)

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glibc is providing open64 and other lfs64 functions but musl aliases
them to normal equivalents since off_t is always 64-bit on musl,
therefore check for target env along when target OS is linux before
using open64, this is more available. Latest Musl has made these
namespace changes [1]

There is no need for using LFS64 open explicitly as we are only using it
for opening device files and not real files

[1] https://git.musl-libc.org/cgit/musl/commit/?id=246f1c811448f37a44b41cd8df8d0ef9736d95f4

Signed-off-by: Khem Raj <raj.khem@gmail.com>

Signed-off-by: Khem Raj <raj.khem@gmail.com>
This commit is contained in:
Khem Raj 2023-01-06 00:43:34 -08:00 committed by GitHub
parent 698a6d1a06
commit 7f73e3ccc1
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1 changed files with 1 additions and 9 deletions
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10
src/util_libc.rs
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@ -140,19 +140,11 @@ impl Weak {
}
}
cfg_if! {
if #[cfg(any(target_os = "linux", target_os = "emscripten"))] {
use libc::open64 as open;
} else {
use libc::open;
}
}
// SAFETY: path must be null terminated, FD must be manually closed.
pub unsafe fn open_readonly(path: &str) -> Result<libc::c_int, Error> {
debug_assert_eq!(path.as_bytes().last(), Some(&0));
loop {
let fd = open(path.as_ptr() as *const _, libc::O_RDONLY | libc::O_CLOEXEC);
let fd = libc::open(path.as_ptr() as *const _, libc::O_RDONLY | libc::O_CLOEXEC);
if fd >= 0 {
return Ok(fd);
}