Signal List

Linux 系統使用Signal作為IPC(的一種)。
使用

$ kill -l

可以列出系統支援的Signal有哪些。

SIGHUP      1 Exit Hangup (ref termio(7I)) 
SIGINT      2 Exit Interrupt (ref termio(7I)) 
SIGQUIT     3 Core Quit (ref termio(7I)) 
SIGILL      4 Core Illegal Instruction 
SIGTRAP     5 Core Trace or breakpoint trap 
SIGABRT     6 Core Abort 
SIGEMT      7 Core Emulation trap 
SIGFPE      8 Core Arithmetic exception 
SIGKILL     9 Exit Kill 
SIGBUS     10 Core Bus error--a misaligned address error 
SIGSEGV    11 Core Segmentation fault, an address reference boundary error 
SIGSYS     12 Core Bad system call 
SIGPIPE    13 Exit Broken pipe 
SIGALRM    14 Exit Alarm clock 
SIGTERM    15 Exit Terminated 
SIGUSR1    16 Exit User defined signal 1 
SIGUSR2    17 Exit User defined signal 2 
SIGCHLD    18 Ignore Child process status changed 
SIGPWR     19 Ignore Power fail or restart 
SIGWINCH   20 Ignore Window size change 
SIGURG     21 Ignore Urgent socket condition 
SIGPOLL    22 Exit Pollable event (ref streamio(7I)) 
SIGSTOP    23 Stop Stop (cannot be caught or ignored) 
SIGTSTP    24 Stop Stop (job control, e.g., CTRL-z)) 
SIGCONT    25 Ignore Continued 
SIGTTIN    26 Stop Stopped--tty input (ref termio(7I)) 
SIGTTOU    27 Stop Stopped--tty output (ref termio(7I)) SIGVTALRM  28 Exit Virtual timer expired 
SIGPROF    29 Exit Profiling timer expired 
SIGXCPU    30 Core CPU time limit exceeded (ref getrlimit(2)) SIGXFSZ    31 Core File size limit exceeded (ref getrlimit(2)) SIGWAITING 32 Ignore Concurrency signal used by threads library 
SIGLWP     33 Ignore Inter-LWP signal used by threads library SIGFREEZE  34 Ignore Checkpoint suspend 
SIGTHAW    35 Ignore Checkpoint resume 
SIGCANCEL  36 Ignore Cancellation signal used by threads library 
SIGLOST    37 Ignore Resource lost 
SIGRTMIN   38 Exit Highest priority real-time signal 
SIGRTMAX   45 Exit Lowest priority real-time signal