sigsetops.3c (2010 09)

sigsetops(3C) sigsetops(3C)

NAME

sigemptyset( ), sigﬁllset( ), sigaddset( ), sigdelset( ), sigismember( ) - initialize, manipulate, and test signal

sets

SYNOPSIS

#include <signal.h>

int sigemptyset(sigset_t *set);

int sigfillset(sigset_t *set);

int sigaddset(sigset_t *set, int signo);

int sigdelset(sigset_t *set, int signo);

int sigismember(const sigset_t *set, int signo);

DESCRIPTION

sigemptyset()

initializes the signal set pointed to by set , to exclude all signals supported by

HP-UX.

sigfillset() initializes the signal set pointed to by set , to include all signals supported by

HP-UX.

Applications must call either sigemptyset()

or sigfillset() at least once for each object of type

sigset_t before using that object for anything else, including cases where the object is returned from a

function (for example, the oset argument to sigprocmask()

— see sigprocmask (2)).

sigaddset() adds the signal speciﬁed by signo to the signal set pointed to by set .

sigdelset() deletes the signal speciﬁed by signo from the signal set pointed to by set.

sigismember() tests whether the signal speciﬁed by signo is a member of the signal set pointed to by

set .

RETURN VALUE

Upon successful completion,

sigismember()

returns a value of 1 if the speciﬁed signal is a member of

the speciﬁed set, or a value of 0 if it is not. The other functions return a value of 0 upon successful com-

pletion. For all of the above functions, if an error is detected, a value of − 1 is returned and

errno is set

to indicate the error.

ERRORS

sigaddset(), sigdelset(), and sigismember()

fail if the following is true:

[EINVAL] The value of the signo argument is out of range.

WARNINGS

The above functions do not detect a bad address passed in for the set argument. A segmentation fault is

the most likely result.

AUTHOR

sigfillset(), sigemptyset(), sigaddset(), sigdelset(), and sigismember()

were

derived from the IEEE Standard POSIX 1003.1-1988 .

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sigsetops(3C) sigsetops(3C) NAME sigemptyset( ), sigfillset( ), sigaddset( ), sigdelset( ), sigismember( ) - initialize, manipulate, and test signal sets SYNOPSIS #include int sigemptyset(sigset_t *set); int sigfillset(sigset_t *set); int sigaddset(sigset_t *set, int signo); int sigdelset(sigset_t *set, int signo); int sigismember(const sigset_t *set, int signo); DESCRIPTION sigemptyset() initializes the signal set pointed to by set , to exclude all signals supported by HP-UX.
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(Notes) A (Notes) sA 2 Hewlett-Packard Company −1− HP-UX 11i Version 3: September 2010