NAME
pthread_sigmask —
examine and/or change a thread's signal
mask
SYNOPSIS
#include
<signal.h>
int
pthread_sigmask(int
how, const sigset_t
*set, sigset_t
*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() will fail if:
- [
EINVAL] - how is not one of the defined values.
SEE ALSO
sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2), pthreads(3), sigaddset(3)
STANDARDS
pthread_sigmask() conforms to
ISO/IEC 9945-1:1996 (“POSIX.1”).