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