ref: 041d2d96655de6afaac6b20437df8897b03f6c92
dir: /include/bits/linux/sys/signal.h/
typedef int sig_atomic_t; #define SIG_ERR ((void (*)(int)) -1) #define SIG_DFL ((void (*)(int)) 0) #define SIG_IGN ((void (*)(int)) 1) #define SIGHUP 1 #define SIGINT 2 #define SIGQUIT 3 #define SIGILL 4 #define SIGABRT 6 #define SIGFPE 8 #define SIGKILL 9 #define SIGUSR1 10 #define SIGSEGV 11 #define SIGUSR2 12 #define SIGPIPE 13 #define SIGALRM 14 #define SIGTERM 15 #define SIGCHLD 17 #define SIGCONT 18 #define SIGSTOP 19 #define SIGTSTP 20 #define SIGTTIN 21 #define SIGTTOU 22 #define __NR_SIGNALS 23