信号

dutysmart

struct sigaction tSigAct;
void sigCloseHandler (int signo, siginfo_t*, void *)
{
  switch (signo)
  {
    case SIGINT :
    {
      sigReceived = true;
      break;
    }

    case SIGQUIT :
    {
      break;
    }

    case SIGABRT :
    {
      break;
    }

    case SIGPIPE :
    {
      sigReceived = true;
      sigReceivedValue = SIGPIPE;
      break;
    }

    case SIGTERM :
      sigReceived = true;
      break;
    }

    case SIGUSR1 :
    {
      globalClientPointer->parseConfigFile();
      break;
    }
  }
}
  tSigAct.sa_handler = (void(*)(int)) sigCloseHandler;
  sigemptyset( &tSigAct.sa_mask );
  tSigAct.sa_flags   = 0;

   while ( ! sigReceived ){...}

   cout<< sigReceived<<endl;

运行后sigReceived输出true,请问如何知道是收到了什么信号退出的吗？

[ 本帖最后由 dutysmart 于 2009-12-27 17:18 编辑 ]

unistd

是收到了signo信号退出的。。

dutysmart

是，我是问想知道具体哪个的话，可以通过加log看到吗？ 还是有其他方法？

原帖由 unistd 于 2009-12-27 16:35 发表
是收到了signo信号退出的。。

ubuntuer

打印下呗

1. 
   
2. printf("signo is %d\n", signo);
   

复制代码

#define SIGHUP                 1
#define SIGINT                 2
#define SIGQUIT                 3
#define SIGILL                 4
#define SIGTRAP                 5
#define SIGABRT                 6
#define SIGEMT                 7
#define SIGFPE                 8
#define SIGKILL                 9
#define SIGBUS                10
#define SIGSEGV                11
#define SIGSYS                12
#define SIGPIPE                13
...
自己去signal.h里查

或者在你的代码里

1. 
   
2. case SIGINT :
   
3.     {
   
4.       sigReceived = true;
   
5.       printf("%s\n", "SIGINT");
   
6.       break;
   
7.     }
   
8. 
   
9.     case SIGQUIT :
   
10.     {
    
11.        printf("%s\n", "SIGQUIT");
    
12.       break;
    
13.     }
    
14. 
    

复制代码

dutysmart

static bool sigReceived = false;
struct sigaction tSigAct;
void sigCloseHandler (int signo, siginfo_t*, void *)
{
  switch (signo)
  {
    case SIGINT :
    {
      sigReceived = true;
      cout<<"Received SIGINT signal\n"<<endl;
      break;
    }
    case SIGQUIT :
    {
     cout<<"Received SIGQUIT signal\n"<<endl;  break;
    }
    case SIGABRT :
    {
      break;
    }
    case SIGPIPE :
    {
      sigReceived = true;
      sigReceivedValue = SIGPIPE;
      cout<<"Received SIGABRT signal\n"<<endl;
      break;
    }
    case SIGTERM :
      sigReceived = true;
     cout<<"Received SIGTERM signal\n"<<endl;
      break;
    }
    case SIGUSR1 :
    {
      cout<<"Received SIGUSR1 signal\n"<<endl;
      break;
    }
  }
}
  tSigAct.sa_handler = (void(*)(int)) sigCloseHandler;
  sigemptyset( &tSigAct.sa_mask );
  tSigAct.sa_flags  = 0;

  if ( sigaction( SIGINT, &tSigAct, (struct sigaction *) NULL ) == -1 )
  {  cout < <"Unable to trap SIGINT signal due to error %d\n" < <endl; }
   
  if ( sigaction( SIGQUIT, &tSigAct, (struct sigaction *) NULL ) == -1 )
  { cout < <"Unable to trap SIGQUIT signal due to error %d\n" < <endl;}   

  if ( sigaction( SIGABRT, &tSigAct, (struct sigaction *) NULL ) == -1 )
  {  cout < <"Unable to trap SIGABRT signal due to error %d\n" < <endl;;}
   
  if ( sigaction( SIGTERM, &tSigAct, (struct sigaction *) NULL ) == -1 )
  {  cout < <"Unable to trap SIGTERM signal due to error %d\n" < <endl;}

  if ( sigaction( SIGUSR1, &tSigAct, (struct sigaction *) NULL ) == -1 )
  {  cout < < "Unable to trap SIGUSR1 signal due to error %d\n" < <endl;}

   while ( ! sigReceived ){...}

   cout<< sigReceived<<endl;

当sigReceived为true时候，没有看到任何的信号log的信息。这是什么原因呢？