[unix-history] / usr / src / old / refer / hunt / refer3.c

#ifndef lint
static char *sccsid = "@(#)refer3.c	4.1 (Berkeley) %G%";
#endif

#include "refer..c"
#define move(x, y) close(y); dup(x); close(x);

corout(in, out, rprog, arg, outlen)
char *in, *out, *rprog;
{
	int pipev[2], fr1, fr2, fw1, fw2, n;
	int status;

	pipe(pipev); 
	fr1 = pipev[0]; 
	fw1 = pipev[1];
	pipe(pipev); 
	fr2 = pipev[0]; 
	fw2 = pipev[1];
	if (fork() == 0)
	{
		close(fw1); 
		close(fr2);
		move(fr1, 0);
		move(fw2, 1);
		execl(rprog, "deliv", arg, 0);
		err("Can't run %s", (void) rprog);
	}
	close(fw2); 
	close(fr1);
	write(fw1, in , strlen(in));
	close(fw1);
	wait(&status);
	n = read(fr2, out, outlen);
	out[n] = 0;
	close(fr2);
	return(n);
}
Commit	Line	Data
c69167f6 BT	1	#ifndef lint
	2	static char *sccsid = "@(#)refer3.c 4.1 (Berkeley) %G%";
	3	#endif
	4
	5	#include "refer..c"
	6	#define move(x, y) close(y); dup(x); close(x);
	7
	8	corout(in, out, rprog, arg, outlen)
	9	char in, out, *rprog;
	10	{
	11	int pipev[2], fr1, fr2, fw1, fw2, n;
	12	int status;
	13
	14	pipe(pipev);
	15	fr1 = pipev[0];
	16	fw1 = pipev[1];
	17	pipe(pipev);
	18	fr2 = pipev[0];
	19	fw2 = pipev[1];
	20	if (fork() == 0)
	21	{
	22	close(fw1);
	23	close(fr2);
	24	move(fr1, 0);
	25	move(fw2, 1);
	26	execl(rprog, "deliv", arg, 0);
	27	err("Can't run %s", (void) rprog);
	28	}
	29	close(fw2);
	30	close(fr1);
	31	write(fw1, in , strlen(in));
	32	close(fw1);
	33	wait(&status);
	34	n = read(fr2, out, outlen);
	35	out[n] = 0;
	36	close(fr2);
	37	return(n);
	38	}