sigpause(3C) sigpause(3C)
NAME
sigpause - signal management
SYNOPSIS
Obsolescent
DESCRIPTION
The function, along with the and functions provide simplified signal management.
The function removes sig from the calling thread's signal mask and suspends the calling thread until a signal is received. The function
restores the thread's signal mask to its original state before returning.
RETURN VALUE
The function suspends execution of the thread until a signal is received, whereupon it shall return and set to
ERRORS
[EINVAL] sig is not a valid signal number.
WARNINGS
The compiler option must be set to use sigpause(). The use of the function without the option is unspecified.
should not be used in conjunction with signal(2) and sigspace(2).
OBSOLESCENT FUNCTION
will be obsoleted in the near future. The obsolescent function blocks signals according to the value of mask, then atomically waits for an
unmasked signal to arrive. On return, restores the current signal mask to the value that existed before the call. When no signals are to
be blocked, a value of is used for mask.
terminates when it is interrupted by a signal. When terminates, it returns -l and sets to
The obsolescent function is typically used in conjunction with the obsoleted function.
Threads Considerations
Since blocked signal masks are maintained at the thread level, the obsolescent function modifies only the calling thread's blocked signal
mask. suspends only the calling thread until it receives a signal.
If other threads in the process do not block the signal, the signal may be delivered to another thread in the process and the thread in may
continue waiting. For this reason, the use of sigwait(2) is recommended instead of for multi-threaded applications.
For more information regarding signals and threads, refer to signal(5).
LP64 Programs
This obsolescent accepts a long (64 bit) value. However, as for ILP32 programs, supports signals numbered 1 through 32. The upper 32 bits
of the mask argument are ignored.
Author
was developed by the University of California, Berkeley.
SEE ALSO
kill(1), kill(2), pause(2), signal(2), wait(2), abort(3C), setjmp(3C), sighold(3C), sigignore(3C), sigrelse(3C), sigset(3C), signal(5).
STANDARDS CONFORMANCE
sigpause(3C)
