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//===---------- Linux implementation of the shm_unlink function -----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/sys/mman/shm_unlink.h"
#include "hdr/fcntl_macros.h"
#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
#include "src/__support/libc_errno.h" // For internal errno.
#include "src/__support/macros/config.h"
#include "src/sys/mman/linux/shm_common.h"
#include <sys/syscall.h> // For SYS_unlink, SYS_unlinkat
namespace LIBC_NAMESPACE_DECL {
// TODO: move the unlink syscall to a shared utility.
LLVM_LIBC_FUNCTION(int, shm_unlink, (const char *name)) {
auto path_result = shm_common::translate_name(name);
if (!path_result.has_value()) {
libc_errno = path_result.error();
return -1;
}
#ifdef SYS_unlink
int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_unlink, path_result->data());
#elif defined(SYS_unlinkat)
int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_unlinkat, AT_FDCWD,
path_result->data(), 0);
#else
#error "unlink and unlinkat syscalls not available."
#endif
if (ret < 0) {
libc_errno = -ret;
return -1;
}
return ret;
}
} // namespace LIBC_NAMESPACE_DECL
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