Unix / Linux Signals

  #define SIGHUP       1      /* hangup detected */
  #define SIGINT       2      /* interrupt */
  #define SIGQUIT      3      /* quit from keyboard */
  #define SIGILL       4      /* illegal instruction */
  #define SIGTRAP      5      /* trace or breakpoint trap */
  #define SIGABRT      6      /* abort signal from abort(3) */
  #define SIGIOT       6      /* IOT trap. A synonym for SIGABRT */
  #define SIGBUS       7      /* bus error (bad memory access) */
  #define SIGFPE       8      /* floating point exception */
  #define SIGKILL      9      /* kill signal (cannot catch this signal) */
  #define SIGUSR1     10      /* user definable signal one */
  #define SIGSEGV     11      /* segment violation (invalid memory ref) */
  #define SIGUSR2     12      /* user definable signal two */
  #define SIGPIPE     13      /* broken pipe (write to a pipe w/ no readers) */
  #define SIGALRM     14      /* timer signal from alarm(2) */
  #define SIGTERM     15      /* termination signal */
  #define SIGSTKFLT   16      /* stack fault */
  #define SIGCHLD     17      /* child process stopped or terminated */
  #define SIGCONT     18      /* continue if stopped */
  #define SIGSTOP     19      /* stop process (cannot catch this signal) */
  #define SIGTSTP     20      /* stop typed at tty */
  #define SIGTTIN     21      /* tty input for background process */
  #define SIGTTOU     22      /* tty output for background process */
  #define SIGURG      23      /* Urgent condition on socket (4.2 BSD) */
  #define SIGXCPU     24      /* CPU time 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 timer expired */
  #define SIGWINCH    28      /* Window resize signal (4.3 BSD, Sun) */
  #define SIGIO       29      /* I/O now possible (4.2 BSD) */
  #define SIGPOLL     SIGIO   /* Pollable event (Sys V). Synonym of SIGIO */
  #define SIGLOST     29      /* File lock lost */
  #define SIGPWR      30      /* Power failure (System V) */
  #define SIGSYS      31      /* Bad argument to routine (SVID) */
  #define SIGUNUSED   31      /* Unused signal (will be SIGSYS) */
  #define SIGRTMIN    32      /* real time signals */
  ...
  #define SIGRTMAX    63      /* real time signals */