1 #include <u.h>
2 #include <libc.h>
3 
4 char	output[4096];
5 void	add(char*, ...);
6 void	error(char*);
7 void	notifyf(void*, char*);
8 
9 void
10 main(int argc, char *argv[])
11 {
12 	int i;
13 	Waitmsg *w;
14 	vlong t0, t1;
15 	long l;
16 	char *p;
17 	char err[ERRMAX];
18 
19 	if(argc <= 1){
20 		fprint(2, "usage: time command\n");
21 		exits("usage");
22 	}
23 
24 	t0 = nsec();
25 	switch(fork()){
26 	case -1:
27 		error("fork");
28 	case 0:
29 		exec(argv[1], &argv[1]);
30 		if(argv[1][0] != '/' && strncmp(argv[1], "./", 2) &&
31 		   strncmp(argv[1], "../", 3)){
32 			sprint(output, "/bin/%s", argv[1]);
33 			exec(output, &argv[1]);
34 		}
35 		error(argv[1]);
36 	}
37 
38 	notify(notifyf);
39 
40     loop:
41 	w = wait();
42 	t1 = nsec();
43 	if(w == nil){
44 		rerrstr(err, sizeof err);
45 		if(strcmp(err, "interrupted") == 0)
46 			goto loop;
47 		error("wait");
48 	}
49 	l = w->time[0];
50 	add("%ld.%.3ldu", l/1000, l%1000);
51 	l = w->time[1];
52 	add("%ld.%.3lds", l/1000, l%1000);
53 	l = (t1-t0)/1000000;
54 	add("%ld.%.3ldr", l/1000, l%1000);
55 	add("\t");
56 	for(i=1; i<argc; i++){
57 		add("%s", argv[i], 0);
58 		if(i>4){
59 			add("...");
60 			break;
61 		}
62 	}
63 	if(w->msg[0]){
64 		p = utfrune(w->msg, ':');
65 		if(p && p[1])
66 			p++;
67 		else
68 			p = w->msg;
69 		add(" # status=%s", p);
70 	}
71 	fprint(2, "%s\n", output);
72 	exits(w->msg);
73 }
74 
75 void
76 add(char *a, ...)
77 {
78 	static int beenhere=0;
79 	va_list arg;
80 
81 	if(beenhere)
82 		strcat(output, " ");
83 	va_start(arg, a);
84 	vseprint(output+strlen(output), output+sizeof(output), a, arg);
85 	va_end(arg);
86 	beenhere++;
87 }
88 
89 void
90 error(char *s)
91 {
92 
93 	fprint(2, "time: %s: %r\n", s);
94 	exits(s);
95 }
96 
97 void
98 notifyf(void *a, char *s)
99 {
100 	USED(a);
101 	if(strcmp(s, "interrupt") == 0)
102 		noted(NCONT);
103 	noted(NDFLT);
104 }