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GSIGNAL(3)			    Linux Programmer's Manual			       GSIGNAL(3)

       gsignal, ssignal - software signal facility

       #include <signal.h>

       typedef void (*sighandler_t)(int);

       int gsignal(signum);

       sighandler_t ssignal(int signum, sighandler_t action);

       Don't  use  these  functions  under Linux.  Due to a historical mistake, under Linux these
       functions are aliases for raise() and signal(), respectively.

       Elsewhere, on SYSV-like systems, these functions implement software  signalling,  entirely
       independent of the classical signal and kill functions. The function ssignal() defines the
       action to take when the software signal with number signum is raised  using  the  function
       gsignal(),  and	returns the previous such action or SIG_DFL.  The function gsignal() does
       the following: if no action (or the action SIG_DFL) was specified for signum, then it does
       nothing and returns 0.  If the action SIG_IGN was specified for signum, then it does noth-
       ing and returns 1.  Otherwise, it resets the action to SIG_DFL and calls the action  func-
       tion with parameter signum, and returns the value returned by that function.  The range of
       possible values signum varies (often 1-15 or 1-17).

       SVID2, XPG2.  These functions are available under AIX, DG-UX, HPUX, SCO,  Solaris,  Tru64.
       They  are called obsolete under most of these systems, and are broken under Linux libc and
       glibc.  Some systems also have gsignal_r() and ssignal_r().

       kill(2), signal(2), raise(3)

notGNU					    2002-08-25				       GSIGNAL(3)
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