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/errno/libc_errno.h" 14 15 #include <fcntl.h> 16 #include <sys/syscall.h> // For syscall numbers. 17 18 namespace LIBC_NAMESPACE { 19 20 LLVM_LIBC_FUNCTION(int, unlinkat, (int dfd, const char *path, int flags)) { 21 #ifdef SYS_unlinkat 22 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_unlinkat, dfd, path, flags); 23 #else 24 #error "unlinkat syscalls not available." 25 #endif 26 27 if (ret < 0) { 28 libc_errno = -ret; 29 return -1; 30 } 31 return 0; 32 } 33 34 } // namespace LIBC_NAMESPACE 35