1*cf5a6c84SAndroid Build Coastguard Worker /* time.c - time a simple command
2*cf5a6c84SAndroid Build Coastguard Worker *
3*cf5a6c84SAndroid Build Coastguard Worker * Copyright 2013 Rob Landley <[email protected]>
4*cf5a6c84SAndroid Build Coastguard Worker *
5*cf5a6c84SAndroid Build Coastguard Worker * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/time.html
6*cf5a6c84SAndroid Build Coastguard Worker
7*cf5a6c84SAndroid Build Coastguard Worker USE_TIME(NEWTOY(time, "<1^pv[-pv]", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_MAYFORK))
8*cf5a6c84SAndroid Build Coastguard Worker
9*cf5a6c84SAndroid Build Coastguard Worker config TIME
10*cf5a6c84SAndroid Build Coastguard Worker bool "time"
11*cf5a6c84SAndroid Build Coastguard Worker default y
12*cf5a6c84SAndroid Build Coastguard Worker help
13*cf5a6c84SAndroid Build Coastguard Worker usage: time [-pv] COMMAND...
14*cf5a6c84SAndroid Build Coastguard Worker
15*cf5a6c84SAndroid Build Coastguard Worker Run command line and report real, user, and system time elapsed in seconds.
16*cf5a6c84SAndroid Build Coastguard Worker (real = clock on the wall, user = cpu used by command's code,
17*cf5a6c84SAndroid Build Coastguard Worker system = cpu used by OS on behalf of command.)
18*cf5a6c84SAndroid Build Coastguard Worker
19*cf5a6c84SAndroid Build Coastguard Worker -p POSIX format output
20*cf5a6c84SAndroid Build Coastguard Worker -v Verbose
21*cf5a6c84SAndroid Build Coastguard Worker */
22*cf5a6c84SAndroid Build Coastguard Worker
23*cf5a6c84SAndroid Build Coastguard Worker #define FOR_time
24*cf5a6c84SAndroid Build Coastguard Worker #include "toys.h"
25*cf5a6c84SAndroid Build Coastguard Worker
26*cf5a6c84SAndroid Build Coastguard Worker
time_main(void)27*cf5a6c84SAndroid Build Coastguard Worker void time_main(void)
28*cf5a6c84SAndroid Build Coastguard Worker {
29*cf5a6c84SAndroid Build Coastguard Worker struct timespec ts, ts2;
30*cf5a6c84SAndroid Build Coastguard Worker struct rusage ru;
31*cf5a6c84SAndroid Build Coastguard Worker long long sec[3];
32*cf5a6c84SAndroid Build Coastguard Worker int stat, ii, idx, nano[3];
33*cf5a6c84SAndroid Build Coastguard Worker pid_t pid;
34*cf5a6c84SAndroid Build Coastguard Worker char *labels[] = {"\nreal"+FLAG(p), "user", "sys"}, **label = labels,
35*cf5a6c84SAndroid Build Coastguard Worker *vlabels[] ={"Real", "User", "System"}, tab = toys.optflags ? ' ' : '\t';
36*cf5a6c84SAndroid Build Coastguard Worker
37*cf5a6c84SAndroid Build Coastguard Worker if (FLAG(v)) label = vlabels;
38*cf5a6c84SAndroid Build Coastguard Worker clock_gettime(CLOCK_MONOTONIC, &ts);
39*cf5a6c84SAndroid Build Coastguard Worker if (!(pid = XVFORK())) xexec(toys.optargs);
40*cf5a6c84SAndroid Build Coastguard Worker wait4(pid, &stat, 0, &ru);
41*cf5a6c84SAndroid Build Coastguard Worker clock_gettime(CLOCK_MONOTONIC, &ts2);
42*cf5a6c84SAndroid Build Coastguard Worker sec[0] = nanodiff(&ts, &ts2);
43*cf5a6c84SAndroid Build Coastguard Worker nano[0] = (sec[0] % 1000000000)/(toys.optflags ? 1000 : 1000000);
44*cf5a6c84SAndroid Build Coastguard Worker sec[0] /= 1000000000;
45*cf5a6c84SAndroid Build Coastguard Worker sec[1] = ru.ru_utime.tv_sec, nano[1] = ru.ru_utime.tv_usec;
46*cf5a6c84SAndroid Build Coastguard Worker sec[2] = ru.ru_stime.tv_sec, nano[2] = ru.ru_stime.tv_usec;
47*cf5a6c84SAndroid Build Coastguard Worker for (ii = idx = 0; ii<3; ii++)
48*cf5a6c84SAndroid Build Coastguard Worker idx += sprintf(toybuf+idx, "%s%s%c%lld.%0*d\n", label[ii],
49*cf5a6c84SAndroid Build Coastguard Worker FLAG(v) ? " time (s):" : "", tab, sec[ii],
50*cf5a6c84SAndroid Build Coastguard Worker 6>>!toys.optflags, nano[ii]);
51*cf5a6c84SAndroid Build Coastguard Worker if (FLAG(v)) idx += sprintf(toybuf+idx,
52*cf5a6c84SAndroid Build Coastguard Worker "Max RSS (KiB): %ld\nMajor faults: %ld\n"
53*cf5a6c84SAndroid Build Coastguard Worker "Minor faults: %ld\nFile system inputs: %ld\nFile system outputs: %ld\n"
54*cf5a6c84SAndroid Build Coastguard Worker "Voluntary context switches: %ld\nInvoluntary context switches: %ld\n",
55*cf5a6c84SAndroid Build Coastguard Worker ru.ru_maxrss, ru.ru_majflt, ru.ru_minflt, ru.ru_inblock,
56*cf5a6c84SAndroid Build Coastguard Worker ru.ru_oublock, ru.ru_nvcsw, ru.ru_nivcsw);
57*cf5a6c84SAndroid Build Coastguard Worker writeall(2, toybuf, idx);
58*cf5a6c84SAndroid Build Coastguard Worker
59*cf5a6c84SAndroid Build Coastguard Worker toys.exitval = WIFEXITED(stat) ? WEXITSTATUS(stat) : WTERMSIG(stat);
60*cf5a6c84SAndroid Build Coastguard Worker }
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