1 <assertions> 2 <assertion id="1" tag="ref:XSH6:42137:42138"> 3 Default handling for that signal shall occur, if the value of func is SIG_DFL. 4 </assertion> 5 <assertion id="2" tag="ref:XSH6:42138:42138"> 6 The signal shall be ingnored if the value of func is SIG_IGN. 7 </assertion> 8 <assertion id="3" tag="ref:XSH6:42142:42148"> 9 When a signal occurs, and func points to a function, the equivalent of: (*func)(sig); 10 is executed. 11 </assertion> 12 <assertion id="4" tag="ref:XSH6:42150:42153"> 13 If and when the signal handler returns, the program shall resume execution at the 14 point it was interrupted. 15 </assertion> 16 <assertion id="5" tag="ref:XSH6:42166:42167"> 17 If the handler is called, signal() shall return the value of 18 func of the last call to signal() that pertains to the 19 specified signal sig. 20 </assertion> 21 <assertion id="6" tag="ref:XSH6:42170:42172 pt:CX"> 22 The signal( ) function shall return SIG_ERR, and set errno to EINVAL if the sig argument 23 passed to signal() is not a valid signal number 24 </assertion> 25 <assertion id="7" tag="ref:XSH6:42170:42172 pt:CX"> 26 if an attempt is made to catch a 27 signal that cannot be caught or ignore a signal that cannot be ignored. 28 </assertion> 29 </assertions> 30
