From 3265d1f06418eb0360d753c12116310a14b97bde Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Sat, 30 May 2026 02:05:35 -0700
Subject: [PATCH] add fchmod

---
 sys_darwin.zig | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sys_darwin.zig b/sys_darwin.zig
index 318666ea4271e20eae6f42d6ec2588ccf9719a3f..a1f2973163395999c059c44851aeb9a407acb5a7 100644
--- a/sys_darwin.zig
+++ b/sys_darwin.zig
@@ -279,6 +279,7 @@ pub const libc = struct {
     pub extern fn isatty(fd: c_int) c_int;
     pub extern fn lseek(fd: c_int, offset: off_t, whence: c_int) off_t;
     pub extern fn getcwd(buf: [*]u8, size: usize) ?[*:0]u8;
+    pub extern fn fchmod(fildes: c_int, mode: mode_t) c_int;
 };
 
 pub const natural_t = c_uint;
@@ -563,3 +564,8 @@ pub fn getcwd(buf: []u8) ![*:0]u8 {
     if (rc == null) return errno.fromInt(errno.fromLibC());
     return rc.?;
 }
+pub fn fchmod(fd: c_int, mode: mode_t) !void {
+    const rc = libc.fchmod(fd, mode);
+    if (rc == -1) return errno.fromInt(errno.fromLibC());
+    std.debug.assert(rc == 0);
+}
-- 
2.54.0