# 附录\*Linux常见信号

Linux常见信号

| 编号 | 信号名称             | 缺省动作 | 说明                  |
| -- | ---------------- | ---- | ------------------- |
| 1  | SIGHUP           | 终止   | 终止控制终端或进程           |
| 2  | SIGINT           | 终止   | 键盘产生的中断(Ctrl-C)     |
| 3  | SIGQUIT          | dump | 键盘产生的退出             |
| 4  | SIGILL           | dump | 非法指令                |
| 5  | SIGTRAP          | dump | debug中断             |
| 6  | SIGABRT／SIGIOT   | dump | 异常中止                |
| 7  | SIGBUS／SIGEMT    | dump | 总线异常/EMT指令          |
| 8  | SIGFPE           | dump | 浮点运算溢出              |
| 9  | SIGKILL          | 终止   | 强制进程终止              |
| 10 | SIGUSR1          | 终止   | 用户信号,进程可自定义用途       |
| 11 | SIGSEGV          | dump | 非法内存地址引用            |
| 12 | SIGUSR2          | 终止   | 用户信号，进程可自定义用途       |
| 13 | SIGPIPE          | 终止   | 向某个没有读取的管道中写入数据     |
| 14 | SIGALRM          | 终止   | 时钟中断(闹钟)            |
| 15 | SIGTERM          | 终止   | 进程终止                |
| 16 | SIGSTKFLT        | 终止   | 协处理器栈错误             |
| 17 | SIGCHLD          | 忽略   | 子进程退出或中断            |
| 18 | SIGCONT          | 继续   | 如进程停止状态则开始运行        |
| 19 | SIGSTOP          | 停止   | 停止进程运行              |
| 20 | SIGSTP           | 停止   | 键盘产生的停止             |
| 21 | SIGTTIN          | 停止   | 后台进程请求输入            |
| 22 | SIGTTOU          | 停止   | 后台进程请求输出            |
| 23 | SIGURG           | 忽略   | socket发生紧急情况        |
| 24 | SIGXCPU          | dump | CPU时间限制被打破          |
| 25 | SIGXFSZ          | dump | 文件大小限制被打破           |
| 26 | SIGVTALRM        | 终止   | 虚拟定时时钟              |
| 27 | SIGPROF          | 终止   | profile timer clock |
| 28 | SIGWINCH         | 忽略   | 窗口尺寸调整              |
| 29 | SIGIO/SIGPOLL    | 终止   | I/O可用               |
| 30 | SIGPWR           | 终止   | 电源异常                |
| 31 | SIGSYS／SYSUNUSED | dump | 系统调用异常              |


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