From aaea5467f1a8b4c2ce7129ee7bc6bf2e11544167 Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Sat, 30 May 2026 19:42:55 -0700
Subject: [PATCH] add copy_file_range

---
 mod.zig  | 7 +++++++
 test.zig | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/mod.zig b/mod.zig
index ed174aa8566c8d482af72e0acdeb2f79807647e3..acba211c8070bec14aca736f307c9757a62ce13e 100644
--- a/mod.zig
+++ b/mod.zig
@@ -2811,6 +2811,7 @@ pub const libc = struct {
     pub extern fn sched_getaffinity(pid: pid_t, cpusetsize: usize, mask: *cpu_set_t) c_int;
     pub extern fn getrandom(buf: [*]u8, size: usize, flags: c_uint) isize;
     pub extern fn flock(fd: c_int, op: c_int) c_int;
+    pub extern fn copy_file_range(fd_int: c_int, off_in: ?*off_t, fd_out: c_int, off_out: ?*off_t, size: usize, flags: c_uint) isize;
 };
 
 comptime {
@@ -3727,3 +3728,9 @@ pub fn fchmod(fd: c_int, mode: mode_t) !void {
     if (rc == -1) return errno.fromInt(errno.fromLibC());
     std.debug.assert(rc == 0);
 }
+pub fn copy_file_range(fd_int: c_int, off_in: ?*off_t, fd_out: c_int, off_out: ?*off_t, size: usize, flags: c_uint) errno.Error!usize {
+    const rc = libc.copy_file_range(fd_int, off_in, fd_out, off_out, size, flags);
+    if (rc == -1) return errno.fromInt(errno.fromLibC());
+    std.debug.assert(rc >= 0);
+    return @intCast(rc);
+}
diff --git a/test.zig b/test.zig
index aec2685b985375be1a8485262d221340afa09c59..ca5073c67465695fff974f36ea9f970cf8cc2deb 100644
--- a/test.zig
+++ b/test.zig
@@ -81,4 +81,6 @@ test {
     _ = &linux.unlinkat;
     _ = &linux.lseek;
     _ = &linux.getcwd;
+    _ = &linux.fchmod;
+    _ = &linux.copy_file_range;
 }
-- 
2.54.0