1<assertions> 2 <assertion id="1" tag="ref:XSH6:41954:41954 pt:XSI"> 3The sigrelse () function removes a signal sig from the signal mask of 4the calling process. 5 </assertion> 6 <assertion id="2" tag="ref:XSH6:41970:41971 pt:XSI"> 7sigrelse will return 0 upon successful completion. 8 </assertion> 9 <assertion id="3" tag="ref:XSH6:41973:41974 pt:XSI"> 10If the function is passed an illegal signal number, then errno will be set 11to [EINVAL], and sigrelse() will 12return -1. 13 </assertion> 14</assertions> 15