1 /*
2  * tee-- pipe fitting
3  */
4 
5 #include <u.h>
6 #include <libc.h>
7 
8 int	uflag;
9 int	aflag;
10 int	openf[100];
11 
12 char in[8192];
13 
14 int	intignore(void*, char*);
15 
16 void
17 main(int argc, char **argv)
18 {
19 	int i;
20 	int r, n;
21 
22 	ARGBEGIN {
23 	case 'a':
24 		aflag++;
25 		break;
26 
27 	case 'i':
28 		atnotify(intignore, 1);
29 		break;
30 
31 	case 'u':
32 		uflag++;
33 		/* uflag is ignored and undocumented; it's a relic from Unix */
34 		break;
35 
36 	default:
37 		fprint(2, "usage: tee [-ai] [file ...]\n");
38 		exits("usage");
39 	} ARGEND
40 
41 	USED(argc);
42 	n = 0;
43 	while(*argv) {
44 		if(aflag) {
45 			openf[n] = open(argv[0], OWRITE);
46 			if(openf[n] < 0)
47 				openf[n] = create(argv[0], OWRITE, 0666);
48 			seek(openf[n], 0L, 2);
49 		} else
50 			openf[n] = create(argv[0], OWRITE, 0666);
51 		if(openf[n] < 0) {
52 			fprint(2, "tee: cannot open %s: %r\n", argv[0]);
53 		} else
54 			n++;
55 		argv++;
56 	}
57 	openf[n++] = 1;
58 
59 	for(;;) {
60 		r = read(0, in, sizeof in);
61 		if(r <= 0)
62 			exits(nil);
63 		for(i=0; i<n; i++)
64 			write(openf[i], in, r);
65 	}
66 }
67 
68 int
69 intignore(void *a, char *msg)
70 {
71 	USED(a);
72 	if(strcmp(msg, "interrupt") == 0)
73 		return 1;
74 	return 0;
75 }