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Adopt Rust libc::MNT_LOCAL

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Note the ST_LOCAL usage on NetBSD is also covered by this.
This commit is contained in:
Peter Ammon
2025-08-16 12:28:10 -07:00
parent 0aa05032c4
commit c1f3d93b3b
3 changed files with 15 additions and 55 deletions
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12
src/libc.c
View File

@@ -4,9 +4,9 @@
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mount.h> // MNT_LOCAL
#include <sys/mount.h>
#include <sys/resource.h>
#include <sys/statvfs.h> // ST_LOCAL
#include <sys/statvfs.h>
#include <unistd.h>
uint64_t C_ST_LOCAL() {
@@ -17,14 +17,6 @@ uint64_t C_ST_LOCAL() {
#endif
}
uint64_t C_MNT_LOCAL() {
#if defined(MNT_LOCAL)
return MNT_LOCAL;
#else
return 0;
#endif
}
const char* C_PATH_BSHELL() { return _PATH_BSHELL; }
FILE* stdout_stream() { return stdout; }

3
src/libc.rs
View File

@@ -23,9 +23,6 @@ pub fn $cvar() -> $type {
};
}
CVAR!(C_ST_LOCAL, ST_LOCAL, u64);
CVAR!(C_MNT_LOCAL, MNT_LOCAL, u64);
CVAR!(C_RLIMIT_SBSIZE, RLIMIT_SBSIZE, i32);
CVAR!(C_RLIMIT_CORE, RLIMIT_CORE, i32);
CVAR!(C_RLIMIT_DATA, RLIMIT_DATA, i32);

55
src/path.rs
View File

@@ -694,49 +694,20 @@ pub fn path_remoteness(path: &wstr) -> DirRemoteness {
}
#[cfg(not(any(target_os = "linux", cygwin)))]
{
fn remoteness_via_statfs<StatFS, Flags>(
statfn: unsafe extern "C" fn(*const libc::c_char, *mut StatFS) -> libc::c_int,
flagsfn: fn(&StatFS) -> Flags,
is_local_flag: u64,
path: &std::ffi::CStr,
) -> DirRemoteness
where
u64: From<Flags>,
{
if is_local_flag == 0 {
return DirRemoteness::unknown;
}
let mut buf = MaybeUninit::uninit();
if unsafe { (statfn)(path.as_ptr(), buf.as_mut_ptr()) } < 0 {
return DirRemoteness::unknown;
}
let buf = unsafe { buf.assume_init() };
// statfs::f_flag is hard-coded as 64-bits on 32/64-bit FreeBSD but it's a (4-byte)
// long on 32-bit NetBSD.. and always 4-bytes on macOS (even on 64-bit builds).
#[allow(clippy::useless_conversion)]
if u64::from((flagsfn)(&buf)) & is_local_flag != 0 {
DirRemoteness::local
} else {
DirRemoteness::remote
}
let mut buf = MaybeUninit::uninit();
if unsafe { libc::statfs(narrow.as_ptr(), buf.as_mut_ptr()) } < 0 {
return DirRemoteness::unknown;
}
let buf = unsafe { buf.assume_init() };
// statfs::f_flag is hard-coded as 64-bits on 32/64-bit FreeBSD but it's a (4-byte)
// long on 32-bit NetBSD.. and always 4-bytes on macOS (even on 64-bit builds).
#[allow(clippy::useless_conversion)]
let flags = u64::from(buf.f_flags);
if flags & (libc::MNT_LOCAL as u64) != 0 {
DirRemoteness::local
} else {
DirRemoteness::remote
}
// ST_LOCAL is a flag to statvfs, which is itself standardized.
// In practice the only system to define it is NetBSD.
#[cfg(target_os = "netbsd")]
let remoteness = remoteness_via_statfs(
libc::statvfs,
|stat: &libc::statvfs| stat.f_flag,
crate::libc::ST_LOCAL(),
&narrow,
);
#[cfg(not(target_os = "netbsd"))]
let remoteness = remoteness_via_statfs(
libc::statfs,
|stat: &libc::statfs| stat.f_flags,
crate::libc::MNT_LOCAL(),
&narrow,
);
remoteness
}
}