1 #include <u.h>
2 #include <libc.h>
3 
4 int touch(int, char *);
5 ulong now;
6 
7 void
8 usage(void)
9 {
10 	fprint(2, "usage: touch [-c] [-t time] files\n");
11 	exits("usage");
12 }
13 
14 void
15 main(int argc, char **argv)
16 {
17 	int nocreate = 0;
18 	int status = 0;
19 
20 	now = time(0);
21 	ARGBEGIN{
22 	case 't':
23 		now = strtoul(EARGF(usage()), 0, 0);
24 		break;
25 	case 'c':
26 		nocreate = 1;
27 		break;
28 	default:	
29 		usage();
30 	}ARGEND
31 
32 	if(!*argv)
33 		usage();
34 	while(*argv)
35 		status += touch(nocreate, *argv++);
36 	if(status)
37 		exits("touch");
38 	exits(0);
39 }
40 
41 int
42 touch(int nocreate, char *name)
43 {
44 	Dir stbuff;
45 	int fd;
46 
47 	nulldir(&stbuff);
48 	stbuff.mtime = now;
49 	if(dirwstat(name, &stbuff) >= 0)
50 		return 0;
51 	if(nocreate){
52 		fprint(2, "touch: %s: cannot wstat: %r\n", name);
53 		return 1;
54 	}
55 	if ((fd = create(name, OREAD, 0666)) < 0) {
56 		fprint(2, "touch: %s: cannot create: %r\n", name);
57 		return 1;
58 	}
59 	dirfwstat(fd, &stbuff);
60 	close(fd);
61 	return 0;
62 }