Linux中32个信号及其含义

你的名字 2022-12-31 13:22 249阅读 0赞

## Linux中32个信号及其含义 ##

<table> 
 <thead> 
  <tr> 
   <th>信号</th> 
   <th>含义</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>#define SIGHUP 1</td> 
   <td>终端挂起或控制进程终止</td> 
  </tr> 
  <tr> 
   <td>#define SIGINT 2</td> 
   <td>终端中断(Ctrl+C 组合键)</td> 
  </tr> 
  <tr> 
   <td>#define SIGQUIT 3</td> 
   <td>终端退出(Ctrl+\组合键)</td> 
  </tr> 
  <tr> 
   <td>#define SIGILL 4</td> 
   <td>非法指令</td> 
  </tr> 
  <tr> 
   <td>#define SIGTRAP 5</td> 
   <td>debug 使用，有断点指令产生</td> 
  </tr> 
  <tr> 
   <td>#define SIGABRT 6</td> 
   <td>由 abort(3)发出的退出指令</td> 
  </tr> 
  <tr> 
   <td>#define SIGIOT 6</td> 
   <td>IOT 指令</td> 
  </tr> 
  <tr> 
   <td>#define SIGBUS 7</td> 
   <td>总线错误</td> 
  </tr> 
  <tr> 
   <td>#define SIGFPE 8</td> 
   <td>浮点运算错误</td> 
  </tr> 
  <tr> 
   <td>#define SIGKILL 9</td> 
   <td>杀死、终止进程</td> 
  </tr> 
  <tr> 
   <td>#define SIGUSR1 10</td> 
   <td>用户自定义信号 1</td> 
  </tr> 
  <tr> 
   <td>#define SIGSEGV 11</td> 
   <td>段违例(无效的内存段)</td> 
  </tr> 
  <tr> 
   <td>#define SIGUSR2 12</td> 
   <td>用户自定义信号 2</td> 
  </tr> 
  <tr> 
   <td>#define SIGPIPE 13</td> 
   <td>向非读管道写入数据</td> 
  </tr> 
  <tr> 
   <td>#define SIGALRM 14</td> 
   <td>闹钟</td> 
  </tr> 
  <tr> 
   <td>#define SIGTERM 15</td> 
   <td>软件终止</td> 
  </tr> 
  <tr> 
   <td>#define SIGSTKFLT 16</td> 
   <td>栈异常</td> 
  </tr> 
  <tr> 
   <td>#define SIGCHLD 17</td> 
   <td>子进程结束</td> 
  </tr> 
  <tr> 
   <td>#define SIGCONT 18</td> 
   <td>进程继续</td> 
  </tr> 
  <tr> 
   <td>#define SIGSTOP 19</td> 
   <td>停止进程的执行，只是暂停</td> 
  </tr> 
  <tr> 
   <td>#define SIGTSTP 20</td> 
   <td>停止进程的运行(Ctrl+Z 组合键)</td> 
  </tr> 
  <tr> 
   <td>#define SIGTTIN 21</td> 
   <td>后台进程需要从终端读取数据</td> 
  </tr> 
  <tr> 
   <td>#define SIGTTOU 22</td> 
   <td>后台进程需要向终端写数据</td> 
  </tr> 
  <tr> 
   <td>#define SIGURG 23</td> 
   <td>有"紧急"数据</td> 
  </tr> 
  <tr> 
   <td>#define SIGXCPU 24</td> 
   <td>超过 CPU 资源限制</td> 
  </tr> 
  <tr> 
   <td>#define SIGXFSZ 25</td> 
   <td>文件大小超额</td> 
  </tr> 
  <tr> 
   <td>#define SIGVTALRM 26</td> 
   <td>虚拟时钟信号</td> 
  </tr> 
  <tr> 
   <td>#define SIGPROF 27</td> 
   <td>时钟信号描述</td> 
  </tr> 
  <tr> 
   <td>#define SIGWINCH 28</td> 
   <td>窗口大小改变</td> 
  </tr> 
  <tr> 
   <td>#define SIGIO 29</td> 
   <td>可以进行输入/输出操作</td> 
  </tr> 
  <tr> 
   <td>#define SIGPOLL</td> 
   <td>SIGIO</td> 
  </tr> 
  <tr> 
   <td>#define SIGPWR 30</td> 
   <td>断点重启</td> 
  </tr> 
  <tr> 
   <td>#define SIGSYS 31</td> 
   <td>非法的系统调用</td> 
  </tr> 
  <tr> 
   <td>#define SIGUNUSED 32</td> 
   <td>未使用信号</td> 
  </tr> 
 </tbody> 
</table>

**SIGKILL(9)和 SIGSTOP(19)这两个信号不能被忽略外，其他的信号都可以忽略。**