fixed hashing algorithm to more machine independent

[unix-history] / usr / src / usr.bin / mail / Signal.c

#

#include <signal.h>

/*
* The following is for systems with botched signal() system entries
* which don't return the proper value for the previous signal.
*/

int     oldsigs[17];

static char *SccsId = "@(#)Signal.c     2.1 %G%";

int
(*Signal())(sig, spot)
       int spot;
{
       int ret;

       /* printf("Signal(%d, %.1o)\n", sig, spot); */
       if (sig < 1 || sig > 16)
               return(-1);
       ret = oldsigs[sig];
       oldsigs[sig] = (int) spot;
       signal(sig, spot);
       return(ret);
}

Siginit()
{
       register int i;

       for (i = 1; i < 17; i++) {
               oldsigs[i] = (int) signal(i, SIG_IGN);
               signal(i, (int (*)()) oldsigs[i]);
       }
}