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  Constant:  SIGABRT, SIGBREAK, SIGFPE, SIGILL, SIGINT, SIGSEGV,
             SIGTERM, SIGUSR1, SIGUSR2, SIGUSR3
 
  Include:   <signal.h>
 
  Synopsis:  The <sig> argument must be one of the manifest constants
             listed below (defined in SIGNAL.H). Also listed is the
             operating-mode support for each signal.
 
     Constant     Meaning
 
     SIGABRT      Abnormal termination. The default action terminates
                  the calling program with exit code 3. (Real and
                  protected mode.)
 
     SIGBREAK     CTRL+BREAK signal. The default action terminates the
                  calling program. (Protected mode only.)
 
     SIGFPE       Floating-point error, such as overflow, division by
                  zero, or invalid operation. The default action
                  terminates the calling program. (Real and protected
                  mode.)
 
     SIGILL       Illegal instruction. This signal is not generated by
                  DOS or OS/2, but is supported for ANSI compatibility.
                  The default action terminates the calling program.
                  (Real and protected mode.)
 
     SIGINT       CTRL+C interrupt. The default action issues INT 23H.
                  (Real and protected mode.)
 
     SIGSEGV      Illegal storage access. This signal is not generated
                  by DOS or OS/2, but is supported for ANSI
                  compatibility. The default action terminates the
                  calling program. (Real and protected mode.)
 
     SIGTERM      Termination request sent to the program. This signal
                  is not generated by DOS or OS/2, but is supported for
                  ANSI compatibility. The default action terminates the
                  calling program. (Real and protected mode.)
 
     SIGUSR1      OS/2 process flag A. (Protected mode only.)
 
     SIGUSR2      OS/2 process flag B. (Protected mode only.)
 
     SIGUSR3      OS/2 process flag C. (Protected mode only.)