| //===-- Linux implementation of signal ------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #define __LLVM_LIBC_INTERNAL_SIGACTION |
| #include "src/signal/signal.h" |
| #include "src/signal/sigaction.h" |
| |
| #include "src/__support/common.h" |
| |
| namespace __llvm_libc { |
| |
| LLVM_LIBC_FUNCTION(sighandler_t, signal, (int signum, sighandler_t handler)) { |
| struct __sigaction action, old; |
| action.sa_handler = handler; |
| action.sa_flags = SA_RESTART; |
| // Errno will already be set so no need to worry about changing errno here. |
| return __llvm_libc::sigaction(signum, &action, &old) == -1 ? SIG_ERR |
| : old.sa_handler; |
| } |
| |
| } // namespace __llvm_libc |