linux signals

Signal Name	Number	Description	描述
SIGHUP	1	Hangup (POSIX)	终止进程 终端线路挂断
SIGINT	2	Terminal interrupt (ANSI)	终止进程 中断进程 Ctrl+C
SIGQUIT	3	Terminal quit (POSIX)	建立CORE文件终止进程，并且生成core文件 Ctrl+|
SIGILL	4	Illegal instruction (ANSI)	建立CORE文件,非法指令
SIGTRAP	5	Trace trap (POSIX)	建立CORE文件,跟踪自陷
SIGIOT	6	IOT Trap (4.2 BSD)	建立CORE文件,执行I/O自陷
SIGBUS	7	BUS error (4.2 BSD)	建立CORE文件,总线错误
SIGFPE	8	Floating point exception (ANSI)	建立CORE文件,浮点异常
SIGKILL	9	Kill(can’t be caught or ignored) (POSIX)	终止进程 杀死进程
SIGUSR1	10	User defined signal 1 (POSIX)	终止进程 用户定义信号1
SIGSEGV	11	Invalid memory segment access (ANSI)	建立CORE文件,段非法错误
SIGUSR2	12	User defined signal 2 (POSIX)	终止进程 用户定义信号2
SIGPIPE	13	Write on a pipe with no reader, Broken pipe	(POSIX)
SIGALRM	14	Alarm clock (POSIX)	终止进程 计时器到时
SIGTERM	15	Termination (ANSI)	终止进程 软件终止信号
SIGSTKFLT	16	Stack fault
SIGCLD	SIGCHLD	Same as SIGCHLD (System V)
SIGCHLD	17	Child process has stopped or exited, changed	(POSIX)
SIGCONT	18	Continue executing, if stopped (POSIX)	忽略信号 继续执行一个停止的进程
SIGSTOP	19	Stop executing(can’t be caught or ignored)	(POSIX)
SIGTSTP	20	Terminal stop signal (POSIX)	停止进程 终端来的停止信号 Ctrl+Z
SIGTTIN	21	Background process trying to read, from TTY	(POSIX)
SIGTTOU	22	Background process trying to write, to TTY	(POSIX)
SIGURG	23	Urgent condition on socket (4.2 BSD)	忽略信号 I/O紧急信号
SIGXCPU	24	CPU limit exceeded (4.2 BSD)	终止进程 CPU时限超时
SIGXFSZ	25	File size limit exceeded (4.2 BSD)	终止进程 文件长度过长
SIGVTALRM	26	Virtual alarm clock (4.2 BSD)	终止进程 虚拟计时器到时
SIGPROF	27	Profiling alarm clock (4.2 BSD)	终止进程 统计分布图用计时器到时
SIGWINCH	28	Window size change (4.3 BSD, Sun)	忽略信号 窗口大小发生变化
SIGPOLL	SIGIO	Pollable event occurred (System V)
SIGIO	29	I/O now possible (4.2 BSD)	忽略信号 描述符上可以进行I/O
SIGPWR	30	Power failure restart (System V)
SIGSYS	31	/* Bad system call. */
SIGUNUSED	31
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