HP 3000 Manuals HP 3000 Manuals
sigismember
Tests whether a signal is a member of a signal set.
Syntax
#include <signal.h>
int sigismember (const sigset_t *set, int sig);
Parameters
set A pointer to a structure of type sigset_t containing a set of
signals to test.
sig The signal number of the signal to test for membership in set.
Valid signals are described in Table 3-5 .
Return Values
1 The signal sig is a member of the signal set.
0 The signal sig is not a member of the signal set.
-1 An error occurred. The test is not performed, and errno is
set to indicate the error condition.
Description
The sigismember() function tests whether or not the signal sig is a
member of the set of signals specified in the structure pointed to by
set.
Implementation Considerations
Refer to the EFAULT error description below.
Errors
If an error occurs, errno is set to one of the following values:
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.
EINVAL CAUSE The signal sig is not a valid signal number.
ACTION Refer to Table 3-5 for descriptions of valid
signal numbers.
See Also
sigaction(), sigaddset(), sigdelset(), sigemptyset(), sigfillset(),
<signal.h>, POSIX.1 (Section 3.3.3)