ssignal

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



NAME
       gsignal, ssignal - software signal facility

SYNOPSIS
       #include <signal.h>

       typedef void (*sighandler_t)(int);

       int gsignal(signum);

       sighandler_t ssignal(int signum, sighandler_t action);

DESCRIPTION
       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	gsig-
       nal(),  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	 nothing  and
       returns	1.   Otherwise, it resets the action to SIG_DFL and calls the
       action function with parameter signum, and returns the value  returned
       by  that	 function.  The range of possible values signum varies (often
       1-15 or 1-17).

CONFORMING TO
       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().

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



notGNU				  2002-08-25			   GSIGNAL(3)