From a9f488c55b238f07c376d223832575ac3fedae70 Mon Sep 17 00:00:00 2001
From: Gunnar Beutner <gbeutner@serenityos.org>
Date: Fri, 30 Apr 2021 12:10:09 +0200
Subject: [PATCH] LibC: Make EWOULDBLOCK an alias for EAGAIN

According to POSIX.1 all error codes have to be distinct - with
the exception for EAGAIN and EWOULDBLOCK. Other libcs including
eglibc and newlib define EWOULDBLOCK as an alias for EAGAIN and
some software including OpenTTD expect this behavior.
---
 Userland/Libraries/LibC/errno_numbers.h | 4 ++--
 Userland/Libraries/LibC/string.cpp      | 1 -
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/Userland/Libraries/LibC/errno_numbers.h b/Userland/Libraries/LibC/errno_numbers.h
index 75254037d3e05f..8c9f73865ffd3a 100644
--- a/Userland/Libraries/LibC/errno_numbers.h
+++ b/Userland/Libraries/LibC/errno_numbers.h
@@ -133,8 +133,6 @@ enum ErrnoCode {
 #define ENOPROTOOPT ENOPROTOOPT
     ENOTCONN,
 #define ENOTCONN ENOTCONN
-    EWOULDBLOCK,
-#define EWOULDBLOCK EWOULDBLOCK
     EPROTONOSUPPORT,
 #define EPROTONOSUPPORT EPROTONOSUPPORT
     EDEADLK,
@@ -158,3 +156,5 @@ enum ErrnoCode {
     EMAXERRNO,
 #define EMAXERRNO EMAXERRNO
 };
+
+#define EWOULDBLOCK EAGAIN
diff --git a/Userland/Libraries/LibC/string.cpp b/Userland/Libraries/LibC/string.cpp
index 24ecc430072c73..04021f98110e67 100644
--- a/Userland/Libraries/LibC/string.cpp
+++ b/Userland/Libraries/LibC/string.cpp
@@ -338,7 +338,6 @@ const char* const sys_errlist[] = {
     "No message",
     "No protocol option",
     "Not connected",
-    "Operation would block",
     "Protocol not supported",
     "Resource deadlock would occur",
     "Timed out",