handle all linux archs instead of explictly defining them

Author: hz2

src/fcntl.rs

@@ -487,23 +487,8 @@ pub fn renameat2<P1: ?Sized + NixPath, P2: ?Sized + NixPath, Fd1: std::os::fd::A
         new_path.with_nix_path(|new_cstr| unsafe {
             // Use raw syscall instead of libc::renameat2 to support musl libc and other
             // environments where the libc function may not be available.
-            //
-            // Syscall numbers from the Linux kernel source:
-            // https://github.com/torvalds/linux/blob/master/arch/x86/entry/syscalls/syscall_64.tbl
-            // https://github.com/torvalds/linux/blob/master/arch/arm64/include/asm/unistd32.h
-            #[cfg(target_arch = "x86_64")]
-            const SYS_RENAMEAT2: libc::c_long = 316;
-            #[cfg(target_arch = "x86")]
-            const SYS_RENAMEAT2: libc::c_long = 353;
-            #[cfg(target_arch = "aarch64")]
-            const SYS_RENAMEAT2: libc::c_long = 276;
-            #[cfg(target_arch = "arm")]
-            const SYS_RENAMEAT2: libc::c_long = 382;
-            #[cfg(target_arch = "riscv64")]
-            const SYS_RENAMEAT2: libc::c_long = 276;
-
             libc::syscall(
-                SYS_RENAMEAT2,
+                libc::SYS_renameat2,
                 old_dirfd.as_fd().as_raw_fd(),
                 old_cstr.as_ptr(),
                 new_dirfd.as_fd().as_raw_fd(),

test/test_fcntl.rs

@@ -8,18 +8,7 @@ use nix::fcntl::{openat, readlinkat, renameat};
 #[cfg(target_os = "linux")]
 use nix::fcntl::{openat2, OpenHow, ResolveFlag};
 
-#[cfg(all(
-    target_os = "linux",
-    any(
-        target_arch = "x86_64",
-        target_arch = "x86",
-        target_arch = "aarch64",
-        target_arch = "arm",
-        target_arch = "riscv64",
-        target_arch = "powerpc",
-        target_arch = "s390x"
-    )
-))]
+#[cfg(target_os = "linux")]
 use nix::fcntl::{renameat2, RenameFlags};
 #[cfg(not(target_os = "redox"))]
 use nix::sys::stat::Mode;
@@ -135,18 +124,7 @@ fn test_renameat() {
 }
 
 #[test]
-#[cfg(all(
-    target_os = "linux",
-    any(
-        target_arch = "x86_64",
-        target_arch = "x86",
-        target_arch = "aarch64",
-        target_arch = "arm",
-        target_arch = "riscv64",
-        target_arch = "powerpc",
-        target_arch = "s390x"
-    )
-))]
+#[cfg(target_os = "linux")]
 fn test_renameat2_behaves_like_renameat_with_no_flags() {
     let old_dir = tempfile::tempdir().unwrap();
     let old_dirfd =
@@ -167,18 +145,7 @@ fn test_renameat2_behaves_like_renameat_with_no_flags() {
 }
 
 #[test]
-#[cfg(all(
-    target_os = "linux",
-    any(
-        target_arch = "x86_64",
-        target_arch = "x86",
-        target_arch = "aarch64",
-        target_arch = "arm",
-        target_arch = "riscv64",
-        target_arch = "powerpc",
-        target_arch = "s390x"
-    )
-))]
+#[cfg(target_os = "linux")]
 fn test_renameat2_exchange() {
     let old_dir = tempfile::tempdir().unwrap();
     let old_dirfd =
@@ -215,18 +182,7 @@ fn test_renameat2_exchange() {
 }
 
 #[test]
-#[cfg(all(
-    target_os = "linux",
-    any(
-        target_arch = "x86_64",
-        target_arch = "x86",
-        target_arch = "aarch64",
-        target_arch = "arm",
-        target_arch = "riscv64",
-        target_arch = "powerpc",
-        target_arch = "s390x"
-    )
-))]
+#[cfg(target_os = "linux")]
 fn test_renameat2_noreplace() {
     let old_dir = tempfile::tempdir().unwrap();
     let old_dirfd =