raise---send a signal
#include <signal.h> int raise(int sig); int _raise_r(void *reent, int sig);
Send the signal sig (one of the macros from `
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.
The result is
0 if sig was successfully raised,
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.
ANSI C requires
raise, but allows the full set of signal numbers
to vary from one implementation to another.
Required OS subroutines:
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