|  |  |  | GIMP Base Library Reference Manual |  | 
|---|---|---|---|---|
void (*GimpSignalHandlerFunc) (gint signum); GimpSignalHandlerFunc gimp_signal_private (gint signum, GimpSignalHandlerFunc handler, gint flags);
void (*GimpSignalHandlerFunc) (gint signum);
A prototype for signal handler functions. Note that each function which
takes or returns a variable of this type also accepts or may return
special values defined by your system's signal.h header file (like
SIG_DFL or SIG_IGN).
| signum: | The number of the signal. Useful if different signals are handled by a single handler. | 
GimpSignalHandlerFunc gimp_signal_private (gint signum, GimpSignalHandlerFunc handler, gint flags);
This function furnishes a workalike for signal(2) but which internally invokes sigaction(2) after certain sa_flags are set; these primarily to ensure restarting of interrupted system calls. See sigaction(2) It is a aid to transition and not new development: that effort should employ sigaction directly. [gosgood 18.04.2000]
Cause handler to be run when signum is delivered.  We
use sigaction(2) rather than signal(2) so that we can control the
signal handler's environment completely via flags: some signal(2)
implementations differ in their sematics, so we need to nail down
exactly what we want. [austin 06.04.2000]
| signum: | Selects signal to be handled see man 5 signal (or man 7 signal) | 
| handler: | Handler that maps to signum. Invoked by O/S.
          Handler gets signal that caused invocation. Corresponds
          to the sa_handlerfield of thesigactionstruct. | 
| flags: | Preferences. OR'ed SA_<xxx>. See man sigaction. Corresponds
        to the sa_flagsfield of thesigactionstruct. | 
| Returns : | A reference to the signal handling function which was
         active before the call to gimp_signal_private(). |