@node sigfillset, signal
@subheading Syntax

@example
#include <signal.h>

int sigfillset (sigset_t *set)
@end example

@subheading Description

This function initializes the set of signals pointed to by @var{set} to
include all signals known to the DJGPP runtime system.  Such a full
set, if set by @code{sigprocmask} (@pxref{sigprocmask}), will cause
all signals to be blocked from delivery to their handlers.  Note that
the set returned by this function only includes signals in the range
@code{SIGABRT..SIGTRAP}; software interrupts and/or user-defined signals
aren't included.

@subheading Return Value

0 upon success, -1 if @var{set} is a NULL pointer.

@subheading Portability

@portability !ansi, posix

@subheading Example

@example

  sigset_t full_set, prev_set;

  sigfillset (&full_set);
  sigprocmask (SIG_UNBLOCK, &full_set, &prev_set);

@end example