ref: 2808d4eb5c01837aa901cc6512f563da2d8db8ea
dir: /lib/c/include/bits/amd64-sysv/arch/signal.h/
typedef int sig_atomic_t; #define SIG_ERR -1 #define SIG_DFL 0 #define SIG_IGN 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 SIGSSTP 20 #define SIGTTIN 21 #define SIGTTOU 22 #define __NR_SIGNALS 23