From 88e8e9fb911a93bfea0f57b28bdd3085ad370679 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Sun, 6 Apr 2025 08:04:18 +0200
Subject: [PATCH] std: Remove some FreeBSD version checks and resulting dead
 code.

We now require FreeBSD 13.4+.
---
 lib/std/os.zig    | 61 +++++++++--------------------------------------
 lib/std/posix.zig |  2 +-
 2 files changed, 12 insertions(+), 51 deletions(-)

diff --git a/lib/std/os.zig b/lib/std/os.zig
index 3e9ec49e6e..f71180b5ee 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -158,57 +158,18 @@ pub fn getFdPath(fd: std.posix.fd_t, out_buffer: *[max_path_bytes]u8) std.posix.
             return target;
         },
         .freebsd => {
-            if (builtin.os.isAtLeast(.freebsd, .{ .major = 13, .minor = 0, .patch = 0 }) orelse false) {
-                var kfile: std.c.kinfo_file = undefined;
-                kfile.structsize = std.c.KINFO_FILE_SIZE;
-                switch (posix.errno(std.c.fcntl(fd, std.c.F.KINFO, @intFromPtr(&kfile)))) {
-                    .SUCCESS => {},
-                    .BADF => return error.FileNotFound,
-                    else => |err| return posix.unexpectedErrno(err),
-                }
-                const len = mem.indexOfScalar(u8, &kfile.path, 0) orelse max_path_bytes;
-                if (len == 0) return error.NameTooLong;
-                const result = out_buffer[0..len];
-                @memcpy(result, kfile.path[0..len]);
-                return result;
-            } else {
-                // This fallback implementation reimplements libutil's `kinfo_getfile()`.
-                // The motivation is to avoid linking -lutil when building zig or general
-                // user executables.
-                var mib = [4]c_int{ posix.CTL.KERN, posix.KERN.PROC, posix.KERN.PROC_FILEDESC, std.c.getpid() };
-                var len: usize = undefined;
-                posix.sysctl(&mib, null, &len, null, 0) catch |err| switch (err) {
-                    error.PermissionDenied => unreachable,
-                    error.SystemResources => return error.SystemResources,
-                    error.NameTooLong => unreachable,
-                    error.UnknownName => unreachable,
-                    else => return error.Unexpected,
-                };
-                len = len * 4 / 3;
-                const buf = std.heap.c_allocator.alloc(u8, len) catch return error.SystemResources;
-                defer std.heap.c_allocator.free(buf);
-                len = buf.len;
-                posix.sysctl(&mib, &buf[0], &len, null, 0) catch |err| switch (err) {
-                    error.PermissionDenied => unreachable,
-                    error.SystemResources => return error.SystemResources,
-                    error.NameTooLong => unreachable,
-                    error.UnknownName => unreachable,
-                    else => return error.Unexpected,
-                };
-                var i: usize = 0;
-                while (i < len) {
-                    const kf: *align(1) std.c.kinfo_file = @ptrCast(&buf[i]);
-                    if (kf.fd == fd) {
-                        len = mem.indexOfScalar(u8, &kf.path, 0) orelse max_path_bytes;
-                        if (len == 0) return error.NameTooLong;
-                        const result = out_buffer[0..len];
-                        @memcpy(result, kf.path[0..len]);
-                        return result;
-                    }
-                    i += @intCast(kf.structsize);
-                }
-                return error.FileNotFound;
+            var kfile: std.c.kinfo_file = undefined;
+            kfile.structsize = std.c.KINFO_FILE_SIZE;
+            switch (posix.errno(std.c.fcntl(fd, std.c.F.KINFO, @intFromPtr(&kfile)))) {
+                .SUCCESS => {},
+                .BADF => return error.FileNotFound,
+                else => |err| return posix.unexpectedErrno(err),
             }
+            const len = mem.indexOfScalar(u8, &kfile.path, 0) orelse max_path_bytes;
+            if (len == 0) return error.NameTooLong;
+            const result = out_buffer[0..len];
+            @memcpy(result, kfile.path[0..len]);
+            return result;
         },
         .dragonfly => {
             @memset(out_buffer[0..max_path_bytes], 0);
diff --git a/lib/std/posix.zig b/lib/std/posix.zig
index 2399fbc9c8..4e3fa29f6c 100644
--- a/lib/std/posix.zig
+++ b/lib/std/posix.zig
@@ -6591,7 +6591,7 @@ pub const CopyFileRangeError = error{
 ///
 /// Maximum offsets on Linux and FreeBSD are `maxInt(i64)`.
 pub fn copy_file_range(fd_in: fd_t, off_in: u64, fd_out: fd_t, off_out: u64, len: usize, flags: u32) CopyFileRangeError!usize {
-    if ((comptime builtin.os.isAtLeast(.freebsd, .{ .major = 13, .minor = 0, .patch = 0 }) orelse false) or
+    if (builtin.os.tag == .freebsd or
         (comptime builtin.os.tag == .linux and std.c.versionCheck(.{ .major = 2, .minor = 27, .patch = 0 })))
     {
         var off_in_copy: i64 = @bitCast(off_in);