44 lines · cpp
1//===-- Linux implementation of chmod -------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/sys/stat/chmod.h"10 11#include "src/__support/OSUtil/syscall.h" // For internal syscall function.12#include "src/__support/common.h"13 14#include "hdr/fcntl_macros.h"15#include "hdr/types/mode_t.h"16#include "src/__support/libc_errno.h"17#include "src/__support/macros/config.h"18#include <sys/stat.h>19#include <sys/syscall.h> // For syscall numbers.20 21namespace LIBC_NAMESPACE_DECL {22 23LLVM_LIBC_FUNCTION(int, chmod, (const char *path, mode_t mode)) {24#ifdef SYS_chmod25 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_chmod, path, mode);26#elif defined(SYS_fchmodat)27 int ret =28 LIBC_NAMESPACE::syscall_impl<int>(SYS_fchmodat, AT_FDCWD, path, mode, 0);29#elif defined(SYS_fchmodat2)30 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_fchmodat2, AT_FDCWD, path,31 mode, 0, AT_SYMLINK_NOFOLLOW);32#else33#error "chmod, fchmodat and fchmodat2 syscalls not available."34#endif35 36 if (ret < 0) {37 libc_errno = -ret;38 return -1;39 }40 return 0;41}42 43} // namespace LIBC_NAMESPACE_DECL44