Tests whether a specified signal is a member of the signal set.

    Format

      #include  <signal.h>

      int sigismember  (const sigset_t *set, int sig_number);

1  –  Arguments

 set

    The signal set.

 sig_number

    The individual signal.

2  –  Description

    The sigismember function tests whether sig_number is a member of
    the signal set pointed to by set.

    This function operates on data objects that you can address by
    the application, not on any set of signals known to the system.
    For example, this function does not operate on the set blocked
    from delivery to a process or the set pending for a process.

3  –  Return Values

    1                  Indicates success. The specified signal is a
                       member of the specified set.
    0                  Indicates an error. The specified signal is
                       not a member of the specified set.