HP 3000 Manuals HP 3000 Manuals
sigemptyset
Initializes a signal set to the empty set.
Syntax
#include <signal.h>
int sigemptyset (sigset_t *set);
Parameters
set A pointer to a structure of type sigset_t to initialize to the
empty set.
Return Values
0 Success.
-1 An error occurred. The signal set is not initialized, and
errno is set to indicate the error condition.
Description
The sigemptyset() function initializes set to the empty set. All signals
described in Table 3-5 are excluded from the set.
The sigemptyset() or sigfillset() function must be called to initialize
the structure of type sigset_t pointed to by set prior to its use by
other functions.
Implementation Considerations
Refer to the EFAULT error description below.
Errors
If an error occurs, errno is set to the following value:
EFAULT CAUSE The system detected a NULL or bad address in
attempting to use the set parameter.
ACTION Make sure that the pointer is correctly initialized.
See Also
sigaction(), sigaddset(), sigdelset(), sigfillset(), sigismember(),
<signal.h>, POSIX.1 Section 3.3.3.