<assertions> <assertion id="1" tag="ref:XSH6:41944:41946 pt:XSI"> If sigset() is used and disp is SIG_DFL, then the default action associated with that process will be taken when the signal occurs. </assertion> <assertion id="2" tag="ref:XSH6:41944:41946 pt:XSI"> If sigset() is used and disp is SIG_IGN, then the signal will be ignored signal occurs. </assertion> <assertion id="3" tag="ref:XSH6:41944:41946 pt:XSI"> If sigset() is used and disp is the address of a signal handler, then the signal handler will be executed when the signal is generated. </assertion> <assertion id="4" tag="ref:XSH6:41946:41948 pt:XSI"> If sigset( ) is used, and disp is the address of a signal handler, the system shall add sig to the calling process' signal mask before executing the signal handler </assertion> <assertion id="5" tag="ref:XSH6:41948:41949 pt:XSI"> The calling process's signal mask shall be restored to its state prior to the delivery of the signal, when the signal handler returns. </assertion> <assertion id="6" tag="ref:XSH6:41950:41951 pt:XSI"> If disp is equal to SIG_HOLD, sig shall be added to the calling process' signal mask. </assertion> <assertion id="7" tag="ref:XSH6:41950:41951 pt:XSI"> If disp is equal to SIG_HOLD, sig's disposition shall remain unchanged. </assertion> <assertion id="8" tag="ref:XSH6:41965:41966 pt:XSI"> If the signal had been blocked, upon successful completion, sigset( ) shall return SIG_HOLD </assertion> <assertion id="9" tag="ref:XSH6:41965:41966 pt:XSI"> If the signal had not been blocked, upon successful completion, sigset( ) shall return the signal's previous disposition </assertion> <assertion id="10" tag="ref:XSH6:41967:41977 pt:XSI"> If sigset() was not successful, SIG_ERR shall be returned and errno set to indicate the error. </assertion> </assertions>