SYNOPSIS #include <signal.h> int raise(int sig); int _raise_r(void *reent, int sig);
DESCRIPTION
raise
sends the signal sig
(one of the macros from sys/signal.h).
This interrupts your program’s normal flow of execution, and allows a signal
handler (if you’ve defined one, using signal)
to take control.
The alternate function, _raise_r, is a reentrant version. The extra argument, reent, is a pointer to a reentrancy structure.
RETURNS
The result is 0
if sig
was successfully raised, 1
otherwise. However, the return value (since it depends on the normal flow
of execution) may not be visible, unless the signal handler for sig
terminates with a return
or unless SIG_IGN
is in effect for this signal.
COMPLIANCE
ANSI C requires raise,
but allows the full set of signal numbers to vary from one implementation
to another.
Required OS subroutines: getpid, kill.
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