Revert "[libc] implement ioctl"

[lntue]

Reverts #85890

This fails in full build mode:
https://lab.llvm.org/buildbot/#/builders/163/builds/54478/steps/4/logs/stdio

[llvmbot]

@llvm/pr-subscribers-libc

Author: None (lntue)

Changes

Reverts llvm/llvm-project#85890

This fails in full build mode:
https://lab.llvm.org/buildbot/#/builders/163/builds/54478/steps/4/logs/stdio

---

Full diff: https://github.com/llvm/llvm-project/pull/88226.diff

12 Files Affected:

• (modified) libc/config/linux/aarch64/entrypoints.txt (-3)
• (modified) libc/config/linux/riscv/entrypoints.txt (-3)
• (modified) libc/config/linux/x86_64/entrypoints.txt (-3)
• (modified) libc/spec/linux.td (-18)
• (modified) libc/src/sys/CMakeLists.txt (-1)
• (removed) libc/src/sys/ioctl/CMakeLists.txt (-12)
• (removed) libc/src/sys/ioctl/ioctl.h (-17)
• (removed) libc/src/sys/ioctl/linux/CMakeLists.txt (-13)
• (removed) libc/src/sys/ioctl/linux/ioctl.cpp (-38)
• (removed) libc/test/src/sys/ioctl/CMakeLists.txt (-3)
• (removed) libc/test/src/sys/ioctl/linux/CMakeLists.txt (-14)
• (removed) libc/test/src/sys/ioctl/linux/ioctl_test.cpp (-27)

diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 5649e3ca29f91f..f5f5c437685a21 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -204,9 +204,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     #libc.src.stdio.scanf
     #libc.src.stdio.fscanf
 
-    # sys/ioctl.h entrypoints
-    libc.src.sys.ioctl.ioctl
-
     # sys/mman.h entrypoints
     libc.src.sys.mman.madvise
     libc.src.sys.mman.mmap
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 6c719320b0847a..71289789158f4b 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -209,9 +209,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.stdio.scanf
     libc.src.stdio.fscanf
 
-    # sys/ioctl.h entrypoints
-    libc.src.sys.ioctl.ioctl
-
     # sys/mman.h entrypoints
     libc.src.sys.mman.madvise
     libc.src.sys.mman.mmap
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 5880ad55b71cee..6bb53cb76220fc 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -221,9 +221,6 @@ set(TARGET_LIBC_ENTRYPOINTS
     # https://github.com/llvm/llvm-project/issues/80060
     # libc.src.sys.epoll.epoll_pwait2
 
-    # sys/ioctl.h entrypoints
-    libc.src.sys.ioctl.ioctl
-
     # sys/mman.h entrypoints
     libc.src.sys.mman.madvise
     libc.src.sys.mman.mmap
diff --git a/libc/spec/linux.td b/libc/spec/linux.td
index 6e9b64f5a6b4af..f91f55ddac7846 100644
--- a/libc/spec/linux.td
+++ b/libc/spec/linux.td
@@ -79,24 +79,6 @@ def Linux : StandardSpec<"Linux"> {
       []  // Functions
   >;
 
-  HeaderSpec SysIoctl = HeaderSpec<
-      "sys/ioctl.h",
-      [Macro<"MAP_ANONYMOUS">],
-      [], // Types
-      [], // Enumerations
-      [
-        FunctionSpec<
-            "ioctl",
-            RetValSpec<IntType>,
-            [
-              ArgSpec<IntType>,
-              ArgSpec<UnsignedLongType>,
-              ArgSpec<VoidPtr>,
-            ]
-        >,
-      ]  // Functions
-  >;
-
   HeaderSpec SysMMan = HeaderSpec<
       "sys/mman.h",
       [Macro<"MAP_ANONYMOUS">],
diff --git a/libc/src/sys/CMakeLists.txt b/libc/src/sys/CMakeLists.txt
index ac54df35284a7b..adc666b94202f7 100644
--- a/libc/src/sys/CMakeLists.txt
+++ b/libc/src/sys/CMakeLists.txt
@@ -1,6 +1,5 @@
 add_subdirectory(auxv)
 add_subdirectory(epoll)
-add_subdirectory(ioctl)
 add_subdirectory(mman)
 add_subdirectory(random)
 add_subdirectory(resource)
diff --git a/libc/src/sys/ioctl/CMakeLists.txt b/libc/src/sys/ioctl/CMakeLists.txt
deleted file mode 100644
index 4b50c278c7871a..00000000000000
--- a/libc/src/sys/ioctl/CMakeLists.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_OS})
-  add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_OS})
-endif()
-
-add_entrypoint_object(
-  ioctl
-  ALIAS
-  DEPENDS
-    .${LIBC_TARGET_OS}.ioctl
-)
-
-
diff --git a/libc/src/sys/ioctl/ioctl.h b/libc/src/sys/ioctl/ioctl.h
deleted file mode 100644
index 8365678276a428..00000000000000
--- a/libc/src/sys/ioctl/ioctl.h
+++ /dev/null
@@ -1,17 +0,0 @@
-//===-- Implementation header for mmap function -----------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIBC_SRC_SYS_IOCTL_IOCTL_H
-#define LLVM_LIBC_SRC_SYS_IOCTL_IOCTL_H
-namespace LIBC_NAMESPACE {
-
-int ioctl(int fd, unsigned long request, ...);
-
-} // namespace LIBC_NAMESPACE
-
-#endif // LLVM_LIBC_SRC_SYS_IOCTL_IOCTL_H
diff --git a/libc/src/sys/ioctl/linux/CMakeLists.txt b/libc/src/sys/ioctl/linux/CMakeLists.txt
deleted file mode 100644
index 8a23505d4e9d19..00000000000000
--- a/libc/src/sys/ioctl/linux/CMakeLists.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-add_entrypoint_object(
-  ioctl
-  SRCS
-    ioctl.cpp
-  HDRS
-    ../ioctl.h
-  DEPENDS
-    libc.include.sys_ioctl
-    libc.include.sys_syscall
-    libc.src.__support.OSUtil.osutil
-    libc.src.errno.errno
-)
-
diff --git a/libc/src/sys/ioctl/linux/ioctl.cpp b/libc/src/sys/ioctl/linux/ioctl.cpp
deleted file mode 100644
index 6c8ff54dc2aeef..00000000000000
--- a/libc/src/sys/ioctl/linux/ioctl.cpp
+++ /dev/null
@@ -1,38 +0,0 @@
-//===---------- Linux implementation of the POSIX ioctl function --------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "src/sys/ioctl/ioctl.h"
-
-#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
-#include "src/__support/common.h"
-#include "src/errno/libc_errno.h"
-#include <stdarg.h>
-#include <sys/syscall.h> // For syscall numbers.
-
-namespace LIBC_NAMESPACE {
-
-// This function is currently linux only. It has to be refactored suitably if
-// madvise is to be supported on non-linux operating systems also.
-LLVM_LIBC_FUNCTION(int, ioctl, (int fd, unsigned long request, ...)) {
-  va_list ptr_to_memory;
-  va_start(ptr_to_memory, 1);
-  va_arg(ptr_to_memory, void *) int ret =
-      LIBC_NAMESPACE::syscall_impl<int>(SYS_ioctl, fd, request, ptr_to_memory);
-  va_end(ptr_to_memory);
-
-  // A negative return value indicates an error with the magnitude of the
-  // value being the error code.
-  if (ret < 0) {
-    libc_errno = -ret;
-    return -1;
-  }
-
-  return 0;
-}
-
-} // namespace LIBC_NAMESPACE
diff --git a/libc/test/src/sys/ioctl/CMakeLists.txt b/libc/test/src/sys/ioctl/CMakeLists.txt
deleted file mode 100644
index b4bbe81c92ff2e..00000000000000
--- a/libc/test/src/sys/ioctl/CMakeLists.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_OS})
-  add_subdirectory(${LIBC_TARGET_OS})
-endif()
diff --git a/libc/test/src/sys/ioctl/linux/CMakeLists.txt b/libc/test/src/sys/ioctl/linux/CMakeLists.txt
deleted file mode 100644
index 93e68975c4e1e2..00000000000000
--- a/libc/test/src/sys/ioctl/linux/CMakeLists.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-add_custom_target(libc_sys_ioctl_unittests)
-
-add_libc_unittest(
-  ioctl_test
-  SUITE
-    libc_sys_ioctl_unittests
-  SRCS
-    ioctl_test.cpp
-  DEPENDS
-    libc.include.sys_ioctl
-    libc.src.errno.errno
-    libc.test.errno_setter_matcher
-)
-
diff --git a/libc/test/src/sys/ioctl/linux/ioctl_test.cpp b/libc/test/src/sys/ioctl/linux/ioctl_test.cpp
deleted file mode 100644
index 3de3eff3e8d4c8..00000000000000
--- a/libc/test/src/sys/ioctl/linux/ioctl_test.cpp
+++ /dev/null
@@ -1,27 +0,0 @@
-//===-- Unittests for ioctl -----------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
-#include "src/errno/libc_errno.h"
-#include "src/sys/ioctl/ioctl.h"
-#include "test/UnitTest/ErrnoSetterMatcher.h"
-#include "test/UnitTest/LibcTest.h"
-#include "test/UnitTest/Test.h"
-
-#include <sys/syscall.h>
-#include <unistd.h>
-
-using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
-using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
-
-TEST(LlvmLibcIoctlTest, InvalidFileDescriptor) {
-  int fd = 10;
-  unsigned long request = 10;
-  int res = LIBC_NAMESPACE::ioctl(fd, 10, NULL);
-  EXPECT_THAT(res, Fails(EBADF, -1));
-}