1 //===-- Linux implementation of remove ------------------------------------===// 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/stdio/remove.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" // For AT_* macros. 15 #include "src/__support/macros/config.h" 16 #include "src/errno/libc_errno.h" 17 #include <sys/syscall.h> // For syscall numbers. 18 19 namespace LIBC_NAMESPACE_DECL { 20 21 LLVM_LIBC_FUNCTION(int, remove, (const char *path)) { 22 // We first try unlinking it as a file. If it is ia file, it will succeed. If 23 // it fails with EISDIR, we will try unlinking it as a directory. 24 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_unlinkat, AT_FDCWD, path, 0); 25 if (ret == -EISDIR) 26 ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_unlinkat, AT_FDCWD, path, 27 AT_REMOVEDIR); 28 if (ret >= 0) 29 return 0; 30 libc_errno = -ret; 31 return -1; 32 } 33 34 } // namespace LIBC_NAMESPACE_DECL 35