signals

#define  SIGHUP      1  /* Hangup (POSIX).  */
#define  SIGINT      2  /* Interrupt (ANSI).  */
#define  SIGQUIT     3  /* Quit (POSIX).  */
#define  SIGILL      4  /* Illegal instruction (ANSI).  */
#define  SIGTRAP     5  /* Trace trap (POSIX).  */
#define  SIGABRT     6  /* Abort (ANSI).  */
#define  SIGIOT      6  /* IOT trap (4.2 BSD).  */
#define  SIGBUS      7  /* BUS error (4.2 BSD).  */
#define  SIGFPE      8  /* Floating-point exception (ANSI).  */
#define  SIGKILL     9  /* Kill, unblockable (POSIX).  */
#define  SIGUSR1     10 /* User-defined signal 1 (POSIX).  */
#define  SIGSEGV     11 /* Segmentation violation (ANSI).  */
#define  SIGUSR2     12 /* User-defined signal 2 (POSIX).  */
#define  SIGPIPE     13 /* Broken pipe (POSIX).  */
#define  SIGALRM     14 /* Alarm clock (POSIX).  */
#define  SIGTERM     15 /* Termination (ANSI).  */
#define  SIGSTKFLT   16 /* Stack fault.  */
#define  SIGCLD      SIGCHLD  /* Same as SIGCHLD (System V).  */
#define  SIGCHLD     17 /* Child status has changed (POSIX).  */
#define  SIGCONT     18 /* Continue (POSIX).  */
#define  SIGSTOP     19 /* Stop, unblockable (POSIX).  */
#define  SIGTSTP     20 /* Keyboard stop (POSIX).  */
#define  SIGTTIN     21 /* Background read from tty (POSIX).  */
#define  SIGTTOU     22 /* Background write to tty (POSIX).  */
#define  SIGURG      23 /* Urgent condition on socket (4.2 BSD).  */
#define  SIGXCPU     24 /* CPU limit exceeded (4.2 BSD).  */
#define  SIGXFSZ     25 /* File size limit exceeded (4.2 BSD).  */
#define  SIGVTALRM   26 /* Virtual alarm clock (4.2 BSD).  */
#define  SIGPROF     27 /* Profiling alarm clock (4.2 BSD).  */
#define  SIGWINCH    28 /* Window size change (4.3 BSD, Sun).  */
#define  SIGPOLL     SIGIO /* Pollable event occurred (System V).  */
#define  SIGIO       29 /* I/O now possible (4.2 BSD).  */
#define  SIGPWR      30 /* Power failure restart (System V).  */