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only deal with signals that are not ignored

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ceriel 1990-08-29 11:44:33 +00:00
parent bee5d97eac
commit 1cb247fa39
1 changed files with 6 additions and 2 deletions
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8
lang/m2/libm2/sigtrp.c
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@ -50,6 +50,7 @@ sigtrp(trapno, signo)
*/
extern int errno;
int (*ctch)() = __ctchsig;
int (*oldctch)();
int oldtrap;
if (signo <= 0 || signo >= sizeof(__traps)/sizeof(__traps[0])) {
@ -70,10 +71,13 @@ sigtrp(trapno, signo)
oldtrap = __traps[signo];
if (signal(signo, ctch) == (int (*)())-1) /* errno set by signal */
if ((oldctch = signal(signo, ctch)) == (int (*)())-1) /* errno set by signal */
return -1;
__traps[signo] = trapno;
else if (oldctch == SIG_IGN) {
signal(signo, SIG_IGN);
}
else __traps[signo] = trapno;
return oldtrap;
}