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97 lines
2.0 KiB
97 lines
2.0 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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#include <stdio.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <iostream>
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#include <fstream>
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#include <sys/wait.h>
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using std::string;
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using std::endl;
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using std::cerr;
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string expected;
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void SigUsr1Handler(int sig)
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{
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cerr << expected << "Caught signal SIGUSR1" << endl;
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}
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void SigUsr2Handler(int sig)
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{
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cerr << expected << "Caught signal SIGUSR2" << endl;
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}
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void BlockSignal(int sigNo)
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{
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sigset_t mask;
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sigprocmask(SIG_SETMASK, 0, &mask);
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sigaddset(&mask, sigNo);
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sigprocmask(SIG_SETMASK, &mask, 0);
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}
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void UnblockAllSignals()
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{
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sigset_t mask;
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sigemptyset(&mask);
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sigprocmask(SIG_SETMASK, &mask, 0);
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}
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void BlockAllSignals()
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{
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sigset_t mask;
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sigfillset(&mask);
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sigprocmask(SIG_SETMASK, &mask, 0);
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}
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void UnblockSignal(int sigNo)
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{
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sigset_t mask;
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sigprocmask(SIG_SETMASK, 0, &mask);
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sigdelset(&mask, sigNo);
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sigprocmask(SIG_SETMASK, &mask, 0);
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}
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int main(int argc, char *argv[])
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{
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if (argc == 1)
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{
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expected = "Expected U1 or U2: ";
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}
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else
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{
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expected = "Expected U2: ";
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}
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signal(SIGUSR1, SigUsr1Handler);
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signal(SIGUSR2, SigUsr2Handler);
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kill(getpid(), SIGUSR1);
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kill(getpid(), SIGUSR2);
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if (argc == 1)
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{
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// Second run with non-empty mask
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BlockAllSignals();
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UnblockSignal(SIGUSR2);
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char *execv_argv[3];
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execv_argv[0] = argv[0];
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execv_argv[1] = "1";
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execv_argv[2] = NULL;
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execv(execv_argv[0], execv_argv);
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printf("exec failed\n");
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return -1;
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}
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return 0;
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}
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