c++信号处理

c++信号处理函数定义及简单使用。

/* Signals.  */
#define SIGHUP      1   /* Hangup (POSIX).  */
#define SIGINT      2   /* Interrupt (ANSI).  */
#define SIGQUIT 3   /* Quit (POSIX).  */
#define SIGILL      4   /* Illegal instruction (ANSI).  */
#define SIGTRAP 5   /* Trace trap (POSIX).  */
#define SIGABRT 6   /* Abort (ANSI).  */
#define SIGIOT      6   /* IOT trap (4.2 BSD).  */
#define SIGBUS      7   /* BUS error (4.2 BSD).  */
#define SIGFPE      8   /* Floating-point exception (ANSI).  */
#define SIGKILL     9   /* Kill, unblockable (POSIX).  */
#define SIGUSR1 10  /* User-defined signal 1 (POSIX).  */
#define SIGSEGV 11  /* Segmentation violation (ANSI).  */
#define SIGUSR2 12  /* User-defined signal 2 (POSIX).  */
#define SIGPIPE     13  /* Broken pipe (POSIX).  */
#define SIGALRM 14  /* Alarm clock (POSIX).  */
#define SIGTERM 15  /* Termination (ANSI).  */
#define SIGSTKFLT   16  /* Stack fault.  */
#define SIGCLD      SIGCHLD /* Same as SIGCHLD (System V).  */
#define SIGCHLD 17  /* Child status has changed (POSIX).  */
#define SIGCONT 18  /* Continue (POSIX).  */
#define SIGSTOP 19  /* Stop, unblockable (POSIX).  */
#define SIGTSTP 20  /* Keyboard stop (POSIX).  */
#define SIGTTIN     21  /* Background read from tty (POSIX).  */
#define SIGTTOU 22  /* Background write to tty (POSIX).  */
#define SIGURG      23  /* Urgent condition on socket (4.2 BSD).  */
#define SIGXCPU 24  /* CPU limit exceeded (4.2 BSD).  */
#define SIGXFSZ     25  /* File size limit exceeded (4.2 BSD).  */
#define SIGVTALRM   26  /* Virtual alarm clock (4.2 BSD).  */
#define SIGPROF 27  /* Profiling alarm clock (4.2 BSD).  */
#define SIGWINCH    28  /* Window size change (4.3 BSD, Sun).  */
#define SIGPOLL SIGIO   /* Pollable event occurred (System V).  */
#define SIGIO       29  /* I/O now possible (4.2 BSD).  */
#define SIGPWR  30  /* Power failure restart (System V).  */
#define SIGSYS      31  /* Bad system call.  */
#define SIGUNUSED   31

#define _NSIG       65  /* Biggest signal number + 1
                   (including real-time signals).  */

# 接收到相关信号时，进行处理。
void handle_signal(int signum)
{
    printf("%d\n",signum);
    return;
}
注册信号：
(void) signal(SIGHUP, handle_signal);

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