| 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/libc_errno.h" |
| 16 | #include "src/__support/macros/config.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 |