glue3.c

unix v7是最后一个广泛发布的研究型UNIX版本

# include "refer..c"
corout(in, out, rprog, arg, outlen)
	char *in, *out, *rprog;
{
# define move(x, y) close(y); dup(x); close(x);
int pipev[2], fr1, fr2, fw1, fw2, n;

if (strcmp (rprog, "hunt") ==0)
	return(callhunt(in, out, arg, outlen));
if (strcmp (rprog, "deliv")==0)
	return(dodeliv(in, out, arg, outlen));
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);
	if (rprog[0]!= '/')
		chdir("/usr/lib/refer");
	execl(rprog, "deliv", arg, 0);
	err ("Can't run %s", rprog);
	}
close(fw2); close(fr1);
write (fw1, in , strlen(in));
close(fw1);
wait(0);
n = read (fr2, out, outlen);
out[n]=0;
close(fr2);
}
callhunt(in, out, arg, outlen)
	char *in, *out, *arg;
{
# define ALEN 50
char *argv[20], abuff[ALEN];
extern int typeindex;
int argc;
extern char one[];
extern int onelen;
argv[0] = "hunt";
argv[1] = "-i";
argv[2] = in;
argv[3] = "-t";
argv[4] = out;
argv[5] = outlen;
argv[6] = "-T";
argv[7] = "-F1";
argv[8] = "-o";
argv[9] = one;
argv[10] = onelen;
argv[11] = abuff; strcpy (abuff,arg);
if (strlen(abuff) > ALEN)
	err("abuff not big enough %d", strlen(abuff));
argc = 6;
huntmain (argc,argv);
return(0);
}
dodeliv(in, out, arg, outlen)
	char *in, *out, *arg;
{
# if D1
fprintf(stderr, "in dodeliv, arg /%s/\n", arg?arg:"");
# endif
if (arg && arg[0])
	chdir(arg);
findline(in, out, outlen, 0L);
restodir();
}