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