NAME
pthread_sigmask —
examine and/or change
a thread's signal mask
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <signal.h>
int
pthread_sigmask(
int
how,
const sigset_t *
restrict set,
sigset_t *
restrict oset);
DESCRIPTION
The
pthread_sigmask() function examines and/or changes the
calling thread's signal mask.
If
set is not
NULL
, it specifies a
set of signals to be modified, and
how specifies what to
set the signal mask to:
-
-
SIG_BLOCK
- Union of the current mask and
set.
-
-
SIG_UNBLOCK
- Intersection of the current mask and the complement of
set.
-
-
SIG_SETMASK
- set.
If
oset is not
NULL
, the previous
signal mask is stored in the location pointed to by
oset.
SIGKILL
and
SIGSTOP
cannot be
blocked, and will be silently ignored if included in the signal mask.
RETURN VALUES
If successful,
pthread_sigmask() returns 0. Otherwise, an
error is returned.
ERRORS
pthread_sigmask() shall fail if:
-
-
- [
EINVAL
]
- how is not one of the defined
values.
SEE ALSO
sigaction(2),
sigpending(2),
sigprocmask(2),
sigsuspend(2),
sigwait(2),
sigsetops(3)
STANDARDS
The function conforms to
IEEE Std 1003.1-2001
(“POSIX.1”).