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| -rw-r--r-- | manual/signal.texi | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/manual/signal.texi b/manual/signal.texi index 5c2ba7d..2012980 100644 --- a/manual/signal.texi +++ b/manual/signal.texi @@ -1141,6 +1141,15 @@ This is used in the same way as the @var{action} argument to the @code{signal} function. The value can be @code{SIG_DFL}, @code{SIG_IGN}, or a function pointer. @xref{Basic Signal Handling}. +@item void (*sa_sigaction) (int @var{signum}, siginfo_t *@var{info}, void *@var{ucontext}) +This is an alternate to @code{sa_handler} that is used when the +@code{sa_flags} includes the @code{flag SA_SIGINFO}. Note that this +and @code{sa_handler} overlap; only ever set one at a time. + +The contents of the @var{info} and @var{ucontext} structures are +kernel and architecture dependent. Please see +@manpageurl{sigaction,2} for details. + @item sigset_t sa_mask This specifies a set of signals to be blocked while the handler runs. Blocking is explained in @ref{Blocking for Handler}. Note that the @@ -1324,6 +1333,24 @@ delivered for both terminated children and stopped children. Setting this flag for a signal other than @code{SIGCHLD} has no effect. @end deftypevr +@deftypevr Macro int SA_NOCLDWAIT +This flag is meaningful only for the @code{SIGCHLD} signal. When the +flag is set, the terminated child will not wait for the parent to reap +it, or become a zombie if not reaped. The child will instead be +reaped by the kernel immediately on termination, similar to setting +SIGCHLD to SIG_IGN. + +Setting this flag for a signal other than @code{SIGCHLD} has no effect. +@end deftypevr + +@deftypevr Macro int SA_NODEFER +Normally a signal is added to the signal mask while running its own +handler; this negates that, so that the same signal can be received +while it's handler is running. Note that if the signal is included in +@code{sa_mask}, it is masked regardless of this flag. Only useful when +assigning a function as a signal handler. +@end deftypevr + @deftypevr Macro int SA_ONSTACK @standards{BSD, signal.h} If this flag is set for a particular signal number, the system uses the @@ -1332,6 +1359,12 @@ If a signal with this flag arrives and you have not set a signal stack, the normal user stack is used instead, as if the flag had not been set. @end deftypevr +@deftypevr Macro int SA_RESETHAND +Resets the handler for a signal to SIG_DFL, at the moment specified +handler function begins. I.e. the handler is called once, then the +action resets. +@end deftypevr + @deftypevr Macro int SA_RESTART @standards{BSD, signal.h} This flag controls what happens when a signal is delivered during @@ -1347,6 +1380,12 @@ clear, returning from a handler makes the function fail. @xref{Interrupted Primitives}. @end deftypevr +@deftypevr Macro int SA_SIGINFO +Indicates that the @code{sa_sigaction} three-argument form of the +handler should be used in setting up a handler instead of the +one-argument @code{sa_handler} form. +@end deftypevr + @node Initial Signal Actions @subsection Initial Signal Actions @cindex initial signal actions |