[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]);
	}
}
Commit	Line	Data
4ae3bade KS	1	#
	2
	3	#include <signal.h>
	4
	5	/*
	6	* The following is for systems with botched signal() system entries
	7	* which don't return the proper value for the previous signal.
	8	*/
	9
	10	int oldsigs[17];
	11
79ddb121	12	static char *SccsId = "@(#)Signal.c 2.1 %G%";
4ae3bade KS	13
	14	int
	15	(*Signal())(sig, spot)
	16	int spot;
	17	{
	18	int ret;
	19
	20	/* printf("Signal(%d, %.1o)\n", sig, spot); */
	21	if (sig < 1 \|\| sig > 16)
	22	return(-1);
	23	ret = oldsigs[sig];
	24	oldsigs[sig] = (int) spot;
	25	signal(sig, spot);
	26	return(ret);
	27	}
	28
	29	Siginit()
	30	{
	31	register int i;
	32
	33	for (i = 1; i < 17; i++) {
	34	oldsigs[i] = (int) signal(i, SIG_IGN);
	35	signal(i, (int (*)()) oldsigs[i]);
	36	}
	37	}