| /**************************************************************************** |
| * libs/libc/signal/sig_pause.c |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <unistd.h> |
| #include <signal.h> |
| #include <sched.h> |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: sigpause |
| * |
| * Description: |
| * The sigpause() will remove sig from the calling process' signal mask |
| * and suspend the calling process until a signal is received. The |
| * sigpause() function will restore the process' signal mask to its |
| * original state before returning. |
| * |
| ****************************************************************************/ |
| |
| int sigpause(int signo) |
| { |
| sigset_t set; |
| int ret; |
| |
| /* Get the current set of blocked signals */ |
| |
| sched_lock(); |
| ret = sigprocmask(SIG_SETMASK, NULL, &set); |
| if (ret == OK) |
| { |
| /* Remove the 'signo' from the set of blocked signals */ |
| |
| ret = sigdelset(&set, signo); |
| } |
| |
| /* Let sigsuspend do the rest of the job */ |
| |
| if (ret == OK) |
| { |
| ret = sigsuspend(&set); |
| } |
| |
| sched_unlock(); |
| return ret; |
| } |