[libc-commits] [libc] aca5117 - [libc] Implement fcntl() function (#89507)
via libc-commits
libc-commits at lists.llvm.org
Wed May 1 11:18:48 PDT 2024
Author: Vinayak Dev
Date: 2024-05-01T11:18:44-07:00
New Revision: aca511734f5ff6204fdc65427566c8bd3b810a24
URL: https://github.com/llvm/llvm-project/commit/aca511734f5ff6204fdc65427566c8bd3b810a24
DIFF: https://github.com/llvm/llvm-project/commit/aca511734f5ff6204fdc65427566c8bd3b810a24.diff
LOG: [libc] Implement fcntl() function (#89507)
Fixes #84968.
Implements the `fcntl()` function defined in the `fcntl.h` header.
Added:
libc/hdr/fcntl_macros.h
libc/hdr/types/struct_f_owner_ex.h
libc/hdr/types/struct_flock.h
libc/hdr/types/struct_flock64.h
libc/include/llvm-libc-types/struct_f_owner_ex.h
libc/include/llvm-libc-types/struct_flock.h
libc/include/llvm-libc-types/struct_flock64.h
libc/src/fcntl/fcntl.h
libc/src/fcntl/linux/fcntl.cpp
libc/test/src/fcntl/fcntl_test.cpp
Modified:
libc/config/linux/aarch64/entrypoints.txt
libc/config/linux/riscv/entrypoints.txt
libc/config/linux/x86_64/entrypoints.txt
libc/hdr/CMakeLists.txt
libc/hdr/types/CMakeLists.txt
libc/include/CMakeLists.txt
libc/include/llvm-libc-macros/linux/fcntl-macros.h
libc/include/llvm-libc-types/CMakeLists.txt
libc/spec/posix.td
libc/src/fcntl/CMakeLists.txt
libc/src/fcntl/linux/CMakeLists.txt
libc/test/src/fcntl/CMakeLists.txt
Removed:
################################################################################
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index eedd9342a09f02..ad50b6f59cdcce 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -22,6 +22,7 @@ set(TARGET_LIBC_ENTRYPOINTS
# fcntl.h entrypoints
libc.src.fcntl.creat
+ libc.src.fcntl.fcntl
libc.src.fcntl.open
libc.src.fcntl.openat
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 4ddc1fb365e155..479af40b5b26b9 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -22,6 +22,7 @@ set(TARGET_LIBC_ENTRYPOINTS
# fcntl.h entrypoints
libc.src.fcntl.creat
+ libc.src.fcntl.fcntl
libc.src.fcntl.open
libc.src.fcntl.openat
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 2576e4a92e85e2..5e3ddd34fb4dcb 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -22,6 +22,7 @@ set(TARGET_LIBC_ENTRYPOINTS
# fcntl.h entrypoints
libc.src.fcntl.creat
+ libc.src.fcntl.fcntl
libc.src.fcntl.open
libc.src.fcntl.openat
diff --git a/libc/hdr/CMakeLists.txt b/libc/hdr/CMakeLists.txt
index fb7c342f92b78f..179b05e6ee966d 100644
--- a/libc/hdr/CMakeLists.txt
+++ b/libc/hdr/CMakeLists.txt
@@ -32,6 +32,15 @@ add_proxy_header_library(
libc.include.math
)
+add_proxy_header_library(
+ fcntl_macros
+ HDRS
+ fcntl_macros.h
+ FULL_BUILD_DEPENDS
+ libc.include.llvm-libc-macros.fcntl_macros
+ libc.include.fcntl
+)
+
add_proxy_header_library(
fenv_macros
HDRS
diff --git a/libc/hdr/fcntl_macros.h b/libc/hdr/fcntl_macros.h
new file mode 100644
index 00000000000000..828cb984c0cb14
--- /dev/null
+++ b/libc/hdr/fcntl_macros.h
@@ -0,0 +1,22 @@
+//===-- Definition of macros from fcntl/fcntl.h ---------------------------===//
+//
+// 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_HDR_FCNTL_MACROS_H
+#define LLVM_LIBC_HDR_FCNTL_MACROS_H
+
+#ifdef LIBC_FULL_BUILD
+
+#include "include/llvm-libc-macros/fcntl-macros.h"
+
+#else // Overlay mode
+
+#include <fcntl.h>
+
+#endif // LLVM_LIBC_FULL_BUILD
+
+#endif // LLVM_LIBC_HDR_FCNTL_MACROS_H
diff --git a/libc/hdr/types/CMakeLists.txt b/libc/hdr/types/CMakeLists.txt
index f53766777e7530..46a66ec590202d 100644
--- a/libc/hdr/types/CMakeLists.txt
+++ b/libc/hdr/types/CMakeLists.txt
@@ -14,6 +14,30 @@ add_proxy_header_library(
libc.include.llvm-libc-types.struct_epoll_event
)
+add_proxy_header_library(
+ struct_flock
+ HDRS
+ struct_flock.h
+ FULL_BUILD_DEPENDS
+ libc.include.llvm-libc-types.struct_flock
+)
+
+add_proxy_header_library(
+ struct_flock64
+ HDRS
+ struct_flock64.h
+ FULL_BUILD_DEPENDS
+ libc.include.llvm-libc-types.struct_flock64
+)
+
+add_proxy_header_library(
+ struct_f_owner_ex
+ HDRS
+ struct_f_owner_ex.h
+ FULL_BUILD_DEPENDS
+ libc.include.llvm-libc-types.struct_f_owner_ex
+)
+
add_proxy_header_library(
struct_timespec
HDRS
diff --git a/libc/hdr/types/struct_f_owner_ex.h b/libc/hdr/types/struct_f_owner_ex.h
new file mode 100644
index 00000000000000..49985115ae4bb2
--- /dev/null
+++ b/libc/hdr/types/struct_f_owner_ex.h
@@ -0,0 +1,21 @@
+//===-- Proxy for struct f_owner_ex --------------------------------------===//
+//
+// 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_HDR_TYPES_STRUCT_F_OWNER_EX_H
+#define LLVM_LIBC_HDR_TYPES_STRUCT_F_OWNER_EX_H
+
+#ifdef LIBC_FULL_BUILD
+
+#include "include/llvm-libc-types/struct_f_owner_ex.h"
+
+#else
+
+#include <fcntl.h>
+
+#endif // LIBC_FULL_BUILD
+
+#endif // LLVM_LIBC_HDR_TYPES_STRUCT_F_OWNER_EX_H
diff --git a/libc/hdr/types/struct_flock.h b/libc/hdr/types/struct_flock.h
new file mode 100644
index 00000000000000..a552b91c432b38
--- /dev/null
+++ b/libc/hdr/types/struct_flock.h
@@ -0,0 +1,21 @@
+//===-- Proxy for struct flock -------------------------------------------===//
+//
+// 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_HDR_TYPES_STRUCT_FLOCK_H
+#define LLVM_LIBC_HDR_TYPES_STRUCT_FLOCK_H
+
+#ifdef LIBC_FULL_BUILD
+
+#include "include/llvm-libc-types/struct_flock.h"
+
+#else
+
+#include <fcntl.h>
+
+#endif // LIBC_FULL_BUILD
+
+#endif // LLVM_LIBC_HDR_TYPES_STRUCT_FLOCK_H
diff --git a/libc/hdr/types/struct_flock64.h b/libc/hdr/types/struct_flock64.h
new file mode 100644
index 00000000000000..84fe67816c3372
--- /dev/null
+++ b/libc/hdr/types/struct_flock64.h
@@ -0,0 +1,21 @@
+//===-- Proxy for struct flock64 -----------------------------------------===//
+//
+// 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_HDR_TYPES_STRUCT_FLOCK64_H
+#define LLVM_LIBC_HDR_TYPES_STRUCT_FLOCK64_H
+
+#ifdef LIBC_FULL_BUILD
+
+#include "include/llvm-libc-types/struct_flock64.h"
+
+#else
+
+#include <fcntl.h>
+
+#endif // LIBC_FULL_BUILD
+
+#endif // LLVM_LIBC_HDR_TYPES_STRUCT_FLOCK64_H
diff --git a/libc/include/CMakeLists.txt b/libc/include/CMakeLists.txt
index 6dea8e539969d0..6101ec136b2639 100644
--- a/libc/include/CMakeLists.txt
+++ b/libc/include/CMakeLists.txt
@@ -43,6 +43,10 @@ add_gen_header(
DEPENDS
.llvm-libc-macros.fcntl_macros
.llvm-libc-types.mode_t
+ .llvm-libc-types.struct_flock
+ .llvm-libc-types.struct_flock64
+ .llvm-libc-types.off64_t
+ .llvm-libc-types.pid_t
.llvm-libc-types.off_t
.llvm_libc_common_h
)
diff --git a/libc/include/llvm-libc-macros/linux/fcntl-macros.h b/libc/include/llvm-libc-macros/linux/fcntl-macros.h
index 1d4e5bbbdc770a..8ee95863728e15 100644
--- a/libc/include/llvm-libc-macros/linux/fcntl-macros.h
+++ b/libc/include/llvm-libc-macros/linux/fcntl-macros.h
@@ -67,5 +67,36 @@
#define F_SETFD 2
#define F_GETFL 3
#define F_SETFL 4
+#define F_GETLK 5
+#define F_SETLK 6
+#define F_SETLKW 7
+#define F_SETOWN 8
+#define F_GETOWN 9
+#define F_SETSIG 10
+#define F_GETSIG 11
+#define F_GETLK64 12
+#define F_SETLK64 13
+#define F_SETLKW64 14
+#define F_SETOWN_EX 15
+#define F_GETOWN_EX 16
+
+// Open File Description Locks.
+#define F_OFD_GETLK 36
+#define F_OFD_SETLK 37
+#define F_OFD_SETLKW 38
+
+// Close on succesful
+#define F_CLOEXEC 1
+
+#define F_RDLCK 0
+#define F_WRLCK 1
+#define F_UNLCK 2
+
+// For Large File Support
+#if defined(_LARGEFILE64_SOURCE)
+#define F_GETLK F_GETLK64
+#define F_SETLK F_SETLK64
+#define F_SETLKW F_SETLKW64
+#endif
#endif // LLVM_LIBC_MACROS_LINUX_FCNTL_MACROS_H
diff --git a/libc/include/llvm-libc-types/CMakeLists.txt b/libc/include/llvm-libc-types/CMakeLists.txt
index 16e343d6f3448c..018b6c58316c32 100644
--- a/libc/include/llvm-libc-types/CMakeLists.txt
+++ b/libc/include/llvm-libc-types/CMakeLists.txt
@@ -60,6 +60,9 @@ add_header(rlim_t HDR rlim_t.h)
add_header(time_t HDR time_t.h)
add_header(stack_t HDR stack_t.h)
add_header(suseconds_t HDR suseconds_t.h)
+add_header(struct_flock HDR struct_flock.h DEPENDS .off_t .pid_t)
+add_header(struct_flock64 HDR struct_flock64.h DEPENDS .off64_t .pid_t)
+add_header(struct_f_owner_ex HDR struct_f_owner_ex.h DEPENDS .pid_t)
add_header(struct_timeval HDR struct_timeval.h DEPENDS .suseconds_t .time_t)
add_header(struct_rlimit HDR struct_rlimit.h DEPENDS .rlim_t)
add_header(struct_rusage HDR struct_rusage.h DEPENDS .struct_timeval)
diff --git a/libc/include/llvm-libc-types/struct_f_owner_ex.h b/libc/include/llvm-libc-types/struct_f_owner_ex.h
new file mode 100644
index 00000000000000..c9cc85f69d2b45
--- /dev/null
+++ b/libc/include/llvm-libc-types/struct_f_owner_ex.h
@@ -0,0 +1,25 @@
+//===-- Definition of type struct f_owner_ex ------------------------------===//
+//
+// 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_TYPES_STRUCT_F_OWNER_EX_H
+#define LLVM_LIBC_TYPES_STRUCT_F_OWNER_EX_H
+
+#include "llvm-libc-types/pid_t.h"
+
+enum pid_type {
+ F_OWNER_TID = 0,
+ F_OWNER_PID,
+ F_OWNER_PGRP,
+};
+
+struct f_owner_ex {
+ enum pid_type type;
+ pid_t pid;
+};
+
+#endif // LLVM_LIBC_TYPES_STRUCT_F_OWNER_EX_H
diff --git a/libc/include/llvm-libc-types/struct_flock.h b/libc/include/llvm-libc-types/struct_flock.h
new file mode 100644
index 00000000000000..51c9d27640ea1a
--- /dev/null
+++ b/libc/include/llvm-libc-types/struct_flock.h
@@ -0,0 +1,25 @@
+//===-- Definition of type struct flock64 ---------------------------------===//
+//
+// 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_TYPES_STRUCT_FLOCK_H
+#define LLVM_LIBC_TYPES_STRUCT_FLOCK_H
+
+#include "llvm-libc-types/off_t.h"
+#include "llvm-libc-types/pid_t.h"
+
+#include <stdint.h>
+
+struct flock {
+ int16_t l_type;
+ int16_t l_whence;
+ off_t l_start;
+ off_t l_len;
+ pid_t l_pid;
+};
+
+#endif // LLVM_LIBC_TYPES_STRUCT_FLOCK_H
diff --git a/libc/include/llvm-libc-types/struct_flock64.h b/libc/include/llvm-libc-types/struct_flock64.h
new file mode 100644
index 00000000000000..ac50003ca62f60
--- /dev/null
+++ b/libc/include/llvm-libc-types/struct_flock64.h
@@ -0,0 +1,25 @@
+//===-- Definition of type struct flock64 ---------------------------------===//
+//
+// 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_TYPES_STRUCT_FLOCK64_H
+#define LLVM_LIBC_TYPES_STRUCT_FLOCK64_H
+
+#include "llvm-libc-types/off64_t.h"
+#include "llvm-libc-types/pid_t.h"
+
+#include <stdint.h>
+
+struct flock64 {
+ int16_t l_type;
+ int16_t l_whence;
+ off64_t l_start;
+ off64_t l_len;
+ pid_t l_pid;
+};
+
+#endif // LLVM_LIBC_TYPES_STRUCT_FLOCK64_H
diff --git a/libc/spec/posix.td b/libc/spec/posix.td
index d428d54e32a331..e7a0cf883c6077 100644
--- a/libc/spec/posix.td
+++ b/libc/spec/posix.td
@@ -230,6 +230,11 @@ def POSIX : StandardSpec<"POSIX"> {
RetValSpec<IntType>,
[ArgSpec<ConstCharPtr>, ArgSpec<ModeTType>]
>,
+ FunctionSpec<
+ "fcntl",
+ RetValSpec<IntType>,
+ [ArgSpec<IntType>, ArgSpec<IntType>, ArgSpec<VarArgType>]
+ >,
FunctionSpec<
"open",
RetValSpec<IntType>,
diff --git a/libc/src/fcntl/CMakeLists.txt b/libc/src/fcntl/CMakeLists.txt
index 0b9ee47c4f7c13..77400e9050d08b 100644
--- a/libc/src/fcntl/CMakeLists.txt
+++ b/libc/src/fcntl/CMakeLists.txt
@@ -9,6 +9,13 @@ add_entrypoint_object(
.${LIBC_TARGET_OS}.creat
)
+add_entrypoint_object(
+ fcntl
+ ALIAS
+ DEPENDS
+ .${LIBC_TARGET_OS}.fcntl
+)
+
add_entrypoint_object(
open
ALIAS
diff --git a/libc/src/fcntl/fcntl.h b/libc/src/fcntl/fcntl.h
new file mode 100644
index 00000000000000..8fe3fb3146b91d
--- /dev/null
+++ b/libc/src/fcntl/fcntl.h
@@ -0,0 +1,18 @@
+//===-- Implementation header of fcntl --------------------------*- 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_FCNTL_FCNTL_H
+#define LLVM_LIBC_SRC_FCNTL_FCNTL_H
+
+namespace LIBC_NAMESPACE {
+
+int fcntl(int fd, int cmd, ...);
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_FCNTL_FCNTL_H
diff --git a/libc/src/fcntl/linux/CMakeLists.txt b/libc/src/fcntl/linux/CMakeLists.txt
index 87b8d4695c4fc5..732b7beac41bfb 100644
--- a/libc/src/fcntl/linux/CMakeLists.txt
+++ b/libc/src/fcntl/linux/CMakeLists.txt
@@ -10,6 +10,22 @@ add_entrypoint_object(
libc.src.errno.errno
)
+add_entrypoint_object(
+ fcntl
+ SRCS
+ fcntl.cpp
+ HDRS
+ ../fcntl.h
+ DEPENDS
+ libc.include.fcntl
+ libc.hdr.types.struct_flock
+ libc.hdr.types.struct_flock64
+ libc.hdr.types.struct_f_owner_ex
+ libc.hdr.fcntl_macros
+ libc.src.__support.OSUtil.osutil
+ libc.src.errno.errno
+)
+
add_entrypoint_object(
open
SRCS
diff --git a/libc/src/fcntl/linux/fcntl.cpp b/libc/src/fcntl/linux/fcntl.cpp
new file mode 100644
index 00000000000000..24a20fb364109b
--- /dev/null
+++ b/libc/src/fcntl/linux/fcntl.cpp
@@ -0,0 +1,93 @@
+//===-- Implementation of fcntl -------------------------------------------===//
+//
+// 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/fcntl/fcntl.h"
+
+#include "hdr/fcntl_macros.h"
+#include "hdr/types/struct_f_owner_ex.h"
+#include "hdr/types/struct_flock.h"
+#include "hdr/types/struct_flock64.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.
+
+// The OFD file locks require special handling for LARGEFILES
+namespace LIBC_NAMESPACE {
+LLVM_LIBC_FUNCTION(int, fcntl, (int fd, int cmd, ...)) {
+ void *arg;
+ va_list varargs;
+ va_start(varargs, cmd);
+ arg = va_arg(varargs, void *);
+ va_end(varargs);
+
+ switch (cmd) {
+ case F_SETLKW:
+ return syscall_impl<int>(SYS_fcntl, fd, cmd, arg);
+ case F_OFD_SETLKW: {
+ struct flock *flk = reinterpret_cast<struct flock *>(arg);
+ // convert the struct to a flock64
+ struct flock64 flk64;
+ flk64.l_type = flk->l_type;
+ flk64.l_whence = flk->l_whence;
+ flk64.l_start = flk->l_start;
+ flk64.l_len = flk->l_len;
+ flk64.l_pid = flk->l_pid;
+ // create a syscall
+ return syscall_impl<int>(SYS_fcntl, fd, cmd, &flk64);
+ }
+ case F_OFD_GETLK:
+ case F_OFD_SETLK: {
+ struct flock *flk = reinterpret_cast<struct flock *>(arg);
+ // convert the struct to a flock64
+ struct flock64 flk64;
+ flk64.l_type = flk->l_type;
+ flk64.l_whence = flk->l_whence;
+ flk64.l_start = flk->l_start;
+ flk64.l_len = flk->l_len;
+ flk64.l_pid = flk->l_pid;
+ // create a syscall
+ int retVal = syscall_impl<int>(SYS_fcntl, fd, cmd, &flk64);
+ // On failure, return
+ if (retVal == -1)
+ return -1;
+ // Check for overflow, i.e. the offsets are not the same when cast
+ // to off_t from off64_t.
+ if (static_cast<off_t>(flk64.l_len) != flk64.l_len ||
+ static_cast<off_t>(flk64.l_start) != flk64.l_start) {
+ libc_errno = EOVERFLOW;
+ return -1;
+ }
+ // Now copy back into flk, in case flk64 got modified
+ flk->l_type = flk64.l_type;
+ flk->l_whence = flk64.l_whence;
+ flk->l_start = flk64.l_start;
+ flk->l_len = flk64.l_len;
+ flk->l_pid = flk64.l_pid;
+ return retVal;
+ }
+ case F_GETOWN: {
+ struct f_owner_ex fex;
+ int retVal = syscall_impl<int>(SYS_fcntl, fd, F_GETOWN_EX, &fex);
+ if (retVal == -EINVAL)
+ return syscall_impl<int>(SYS_fcntl, fd, cmd,
+ reinterpret_cast<void *>(arg));
+ if (static_cast<unsigned long>(retVal) <= -4096UL)
+ return fex.type == F_OWNER_PGRP ? -fex.pid : fex.pid;
+
+ libc_errno = -retVal;
+ return -1;
+ }
+ // The general case
+ default:
+ return syscall_impl<int>(SYS_fcntl, fd, cmd, reinterpret_cast<void *>(arg));
+ }
+}
+} // namespace LIBC_NAMESPACE
diff --git a/libc/test/src/fcntl/CMakeLists.txt b/libc/test/src/fcntl/CMakeLists.txt
index ae39d8d5f878c5..aae296f074bea0 100644
--- a/libc/test/src/fcntl/CMakeLists.txt
+++ b/libc/test/src/fcntl/CMakeLists.txt
@@ -17,6 +17,23 @@ add_libc_unittest(
libc.test.UnitTest.ErrnoSetterMatcher
)
+add_libc_unittest(
+ fcntl_test
+ SUITE
+ libc_fcntl_unittests
+ SRCS
+ fcntl_test.cpp
+ DEPENDS
+ libc.include.fcntl
+ libc.src.errno.errno
+ libc.src.fcntl.fcntl
+ libc.src.fcntl.open
+ libc.src.unistd.close
+ libc.hdr.types.struct_flock
+ libc.hdr.fcntl_macros
+ libc.test.UnitTest.ErrnoSetterMatcher
+)
+
add_libc_unittest(
openat_test
SUITE
diff --git a/libc/test/src/fcntl/fcntl_test.cpp b/libc/test/src/fcntl/fcntl_test.cpp
new file mode 100644
index 00000000000000..c5cbb61b4ed8a5
--- /dev/null
+++ b/libc/test/src/fcntl/fcntl_test.cpp
@@ -0,0 +1,155 @@
+//===-- Unittest for fcntl ------------------------------------------------===//
+//
+// 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 "hdr/fcntl_macros.h"
+#include "hdr/types/struct_flock.h"
+#include "src/errno/libc_errno.h"
+#include "src/fcntl/fcntl.h"
+#include "src/fcntl/open.h"
+#include "src/unistd/close.h"
+#include "test/UnitTest/ErrnoSetterMatcher.h"
+#include "test/UnitTest/Test.h"
+
+#include <stdio.h>
+#include <sys/stat.h> // For S_IRWXU
+
+TEST(LlvmLibcFcntlTest, FcntlDupfd) {
+ using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
+ constexpr const char *TEST_FILE_NAME = "testdata/fcntl_dup.test";
+ auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
+ int fd2, fd3;
+ int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC, S_IRWXU);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(fd, 0);
+
+ fd2 = LIBC_NAMESPACE::fcntl(fd, F_DUPFD, 0);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(fd2, 0);
+
+ fd3 = LIBC_NAMESPACE::fcntl(fd, F_DUPFD, 10);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(fd3, 0);
+
+ ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
+ ASSERT_THAT(LIBC_NAMESPACE::close(fd2), Succeeds(0));
+ ASSERT_THAT(LIBC_NAMESPACE::close(fd3), Succeeds(0));
+}
+
+TEST(LlvmLibcFcntlTest, FcntlGetFl) {
+ using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
+ constexpr const char *TEST_FILE_NAME = "testdata/fcntl_getfl.test";
+ auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
+ int retVal;
+ int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC, S_IRWXU);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(fd, 0);
+
+ retVal = LIBC_NAMESPACE::fcntl(fd, F_GETFL);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(retVal, -1);
+
+ ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
+}
+
+TEST(LlvmLibcFcntlTest, FcntlSetFl) {
+ using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
+ constexpr const char *TEST_FILE_NAME = "testdata/fcntl_setfl.test";
+ auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
+
+ int retVal;
+ int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(fd, 0);
+
+ retVal = LIBC_NAMESPACE::fcntl(fd, F_GETFL);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(retVal, -1);
+
+ int oldFlags = LIBC_NAMESPACE::fcntl(fd, F_GETFL, 0);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(oldFlags, 0);
+
+ // Add the APPEND flag;
+ oldFlags |= O_APPEND;
+
+ retVal = LIBC_NAMESPACE::fcntl(fd, F_SETFL, oldFlags);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(retVal, -1);
+
+ // Remove the APPEND flag;
+ oldFlags = -oldFlags & O_APPEND;
+
+ retVal = LIBC_NAMESPACE::fcntl(fd, F_SETFL, oldFlags);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(retVal, -1);
+
+ ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
+}
+
+TEST(LlvmLibcFcntlTest, FcntlGetLkRead) {
+ using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
+ constexpr const char *TEST_FILE_NAME = "testdata/fcntl_getlkread.test";
+ auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
+
+ struct flock flk, svflk;
+ int retVal;
+ int fd =
+ LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDONLY, S_IRWXU);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(fd, 0);
+
+ flk.l_type = F_RDLCK;
+ flk.l_start = 0;
+ flk.l_whence = SEEK_SET;
+ flk.l_len = 50;
+
+ // copy flk into svflk
+ svflk = flk;
+
+ retVal = LIBC_NAMESPACE::fcntl(fd, F_GETLK, &svflk);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(retVal, -1);
+ ASSERT_NE((int)flk.l_type, F_WRLCK); // File should not be write locked.
+
+ retVal = LIBC_NAMESPACE::fcntl(fd, F_SETLK, &svflk);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(retVal, -1);
+
+ ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
+}
+
+TEST(LlvmLibcFcntlTest, FcntlGetLkWrite) {
+ using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
+ constexpr const char *TEST_FILE_NAME = "testdata/fcntl_getlkwrite.test";
+ auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
+
+ struct flock flk, svflk;
+ int retVal;
+ int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(fd, 0);
+
+ flk.l_type = F_WRLCK;
+ flk.l_start = 0;
+ flk.l_whence = SEEK_SET;
+ flk.l_len = 0;
+
+ // copy flk into svflk
+ svflk = flk;
+
+ retVal = LIBC_NAMESPACE::fcntl(fd, F_GETLK, &svflk);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(retVal, -1);
+ ASSERT_NE((int)flk.l_type, F_RDLCK); // File should not be read locked.
+
+ retVal = LIBC_NAMESPACE::fcntl(fd, F_SETLK, &svflk);
+ ASSERT_ERRNO_SUCCESS();
+ ASSERT_GT(retVal, -1);
+
+ ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
+}
More information about the libc-commits
mailing list