From 1b43f27a91cfa2722e256f561b7e08f163913933 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Wed, 7 Jan 2026 14:43:37 -0800
Subject: [PATCH] std.posix: delete epoll APIs

see #6600
---
 lib/std/posix.zig | 88 -----------------------------------------------
 1 file changed, 88 deletions(-)

diff --git a/lib/std/posix.zig b/lib/std/posix.zig
index 20613b7c1d366afa1e56e60011b00ffccdfb78a2..ce6e6de15a4c82345f3a4bce99843a2b1c7228e2 100644
--- a/lib/std/posix.zig
+++ b/lib/std/posix.zig
@@ -677,94 +677,6 @@ fn setSockFlags(sock: socket_t, flags: u32) !void {
     }
 }
 
-pub const EpollCreateError = error{
-    /// The  per-user   limit   on   the   number   of   epoll   instances   imposed   by
-    /// /proc/sys/fs/epoll/max_user_instances  was encountered.  See epoll(7) for further
-    /// details.
-    /// Or, The per-process limit on the number of open file descriptors has been reached.
-    ProcessFdQuotaExceeded,
-
-    /// The system-wide limit on the total number of open files has been reached.
-    SystemFdQuotaExceeded,
-
-    /// There was insufficient memory to create the kernel object.
-    SystemResources,
-} || UnexpectedError;
-
-pub fn epoll_create1(flags: u32) EpollCreateError!i32 {
-    const rc = system.epoll_create1(flags);
-    switch (errno(rc)) {
-        .SUCCESS => return @intCast(rc),
-        else => |err| return unexpectedErrno(err),
-
-        .INVAL => unreachable,
-        .MFILE => return error.ProcessFdQuotaExceeded,
-        .NFILE => return error.SystemFdQuotaExceeded,
-        .NOMEM => return error.SystemResources,
-    }
-}
-
-pub const EpollCtlError = error{
-    /// op was EPOLL_CTL_ADD, and the supplied file descriptor fd is  already  registered
-    /// with this epoll instance.
-    FileDescriptorAlreadyPresentInSet,
-
-    /// fd refers to an epoll instance and this EPOLL_CTL_ADD operation would result in a
-    /// circular loop of epoll instances monitoring one another.
-    OperationCausesCircularLoop,
-
-    /// op was EPOLL_CTL_MOD or EPOLL_CTL_DEL, and fd is not registered with  this  epoll
-    /// instance.
-    FileDescriptorNotRegistered,
-
-    /// There was insufficient memory to handle the requested op control operation.
-    SystemResources,
-
-    /// The  limit  imposed  by /proc/sys/fs/epoll/max_user_watches was encountered while
-    /// trying to register (EPOLL_CTL_ADD) a new file descriptor on  an  epoll  instance.
-    /// See epoll(7) for further details.
-    UserResourceLimitReached,
-
-    /// The target file fd does not support epoll.  This error can occur if fd refers to,
-    /// for example, a regular file or a directory.
-    FileDescriptorIncompatibleWithEpoll,
-} || UnexpectedError;
-
-pub fn epoll_ctl(epfd: i32, op: u32, fd: i32, event: ?*system.epoll_event) EpollCtlError!void {
-    const rc = system.epoll_ctl(epfd, op, fd, event);
-    switch (errno(rc)) {
-        .SUCCESS => return,
-        else => |err| return unexpectedErrno(err),
-
-        .BADF => unreachable, // always a race condition if this happens
-        .EXIST => return error.FileDescriptorAlreadyPresentInSet,
-        .INVAL => unreachable,
-        .LOOP => return error.OperationCausesCircularLoop,
-        .NOENT => return error.FileDescriptorNotRegistered,
-        .NOMEM => return error.SystemResources,
-        .NOSPC => return error.UserResourceLimitReached,
-        .PERM => return error.FileDescriptorIncompatibleWithEpoll,
-    }
-}
-
-/// Waits for an I/O event on an epoll file descriptor.
-/// Returns the number of file descriptors ready for the requested I/O,
-/// or zero if no file descriptor became ready during the requested timeout milliseconds.
-pub fn epoll_wait(epfd: i32, events: []system.epoll_event, timeout: i32) usize {
-    while (true) {
-        // TODO get rid of the @intCast
-        const rc = system.epoll_wait(epfd, events.ptr, @intCast(events.len), timeout);
-        switch (errno(rc)) {
-            .SUCCESS => return @intCast(rc),
-            .INTR => continue,
-            .BADF => unreachable,
-            .FAULT => unreachable,
-            .INVAL => unreachable,
-            else => unreachable,
-        }
-    }
-}
-
 pub const EventFdError = error{
     SystemResources,
     ProcessFdQuotaExceeded,
-- 
2.54.0