Windows上Ubuntu上的Bash:信号处理程序不工作

以下建议代码:

1. 正确检查错误
2. 正确设置struct sigaction
3. 干净地编译

现在,提议的代码:

#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>


void handle_signal(int signo);


void handle_signal(int signo)
{
    if( signo == SIGUSR1 )
    {
        write( 1, "Received user signal\n", 21);
    }
    else
    {
        write( 1, "unexpected signal received\n", 27 );
    }
}


int main( void )
{
    struct sigaction act;

    memset( &act, '\0', sizeof( act ) );
    act.sa_handler = handle_signal;
    //sigfillset(&(act.sa_mask));  // enable catching all signals

    if( sigaction(SIGUSR1, &act, NULL) != 0)
    {
        perror( "sigaction failed" );
        exit( EXIT_FAILURE );
    }

    printf("PID: %d\n", getpid());

    while (1)
        pause();

    return 0;
}