1 //===-- Linux implementation of unlinkat ----------------------------------===// 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/unistd/unlinkat.h" 10 11 #include "src/__support/OSUtil/syscall.h" // For internal syscall function. 12 #include "src/__support/common.h" 13 #include "src/__support/macros/config.h" 14 #include "src/errno/libc_errno.h" 15 16 #include "hdr/fcntl_macros.h" 17 #include <sys/syscall.h> // For syscall numbers. 18 19 namespace LIBC_NAMESPACE_DECL { 20 21 LLVM_LIBC_FUNCTION(int, unlinkat, (int dfd, const char *path, int flags)) { 22 #ifdef SYS_unlinkat 23 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_unlinkat, dfd, path, flags); 24 #else 25 #error "unlinkat syscalls not available." 26 #endif 27 28 if (ret < 0) { 29 libc_errno = -ret; 30 return -1; 31 } 32 return 0; 33 } 34 35 } // namespace LIBC_NAMESPACE_DECL 36