c语言标准函数库的signal.h

c语言标准函数库的signal.h

SIGABRT
abnormal termination
SIGFPE
arithmetic error █
SIGILL
invalid execution
SIGINT
(asynchronous) interactive attention
SIGSEGV
illegal storage access
SIGTERM
(asynchronous) termination request
SIG_DFL
specifies default signal handling
SIG_ERR
signal return value indicating error
SIG_IGN
specifies that signal should be ignored
void (*signal(int sig, void (*handler)(int)))(int);
Install handler for subsequent signal sig. If handler is SIG_DFL, implementation-defined default behaviour will be used; if SIG_IGN, signal will be ignored; otherwise function pointed to by handler will be invoked with argument sig. In the last case, handling is restored to default behaviour before handler is called. If handler returns, execution resumes where signal occurred. signal returns the previous handler or SIG_ERR on error. Initial state is implementation-defined. Implementations may may define signals additional to those listed here.
int raise(int sig);
Sends signal sig. Returns zero on success.