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#include <u.h>
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#include <libc.h>
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int touch(int, char *);
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ulong now;
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void
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usage(void)
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{
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	fprint(2, "usage: touch [-c] [-t time] files\n");
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	exits("usage");
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}
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void
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main(int argc, char **argv)
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{
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	char *t, *s;
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	int nocreate = 0;
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	int status = 0;
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	now = time(0);
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	ARGBEGIN{
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	case 't':
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		t = EARGF(usage());
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		now = strtoul(t, &s, 0);
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		if(s == t || *s != '\0')
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			usage();
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		break;
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	case 'c':
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		nocreate = 1;
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		break;
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	default:
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		usage();
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	}ARGEND
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	if(!*argv)
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		usage();
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	while(*argv)
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		status += touch(nocreate, *argv++);
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	if(status)
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		exits("touch");
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	exits(0);
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}
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touch(int nocreate, char *name)
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{
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	Dir stbuff;
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	int fd;
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	nulldir(&stbuff);
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	stbuff.mtime = now;
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	if(dirwstat(name, &stbuff) >= 0)
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		return 0;
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	if(nocreate){
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		fprint(2, "touch: %s: cannot wstat: %r\n", name);
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		return 1;
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	}
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	if((fd = create(name, OREAD|OEXCL, 0666)) < 0){
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		fprint(2, "touch: %s: cannot create: %r\n", name);
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		return 1;
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	}
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	dirfwstat(fd, &stbuff);
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	close(fd);
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	return 0;
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}