/* time.c - time a simple command * * Copyright 2013 Rob Landley <rob@landley.net> * * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/time.html USE_TIME(NEWTOY(time, "<1^pv", TOYFLAG_USR|TOYFLAG_BIN)) config TIME bool "time" default y depends on TOYBOX_FLOAT help usage: time [-pv] COMMAND [ARGS...] Run command line and report real, user, and system time elapsed in seconds. (real = clock on the wall, user = cpu used by command's code, system = cpu used by OS on behalf of command.) -p POSIX format output (default) -v Verbose */ #define FOR_time #include "toys.h" void time_main(void) { pid_t pid; struct timeval tv, tv2; gettimeofday(&tv, NULL); if (!(pid = XVFORK())) xexec(toys.optargs); else { int stat; struct rusage ru; float r, u, s; wait4(pid, &stat, 0, &ru); gettimeofday(&tv2, NULL); if (tv.tv_usec > tv2.tv_usec) { tv2.tv_usec += 1000000; tv2.tv_sec--; } r = (tv2.tv_sec-tv.tv_sec)+((tv2.tv_usec-tv.tv_usec)/1000000.0); u = ru.ru_utime.tv_sec+(ru.ru_utime.tv_usec/1000000.0); s = ru.ru_stime.tv_sec+(ru.ru_stime.tv_usec/1000000.0); if (FLAG(v)) { fprintf(stderr, "Real time (s): %f\n" "System time (s): %f\n" "User time (s): %f\n" "Max RSS (KiB): %ld\n" "Major faults: %ld\n" "Minor faults: %ld\n" "File system inputs: %ld\n" "File system outputs: %ld\n" "Voluntary context switches: %ld\n" "Involuntary context switches: %ld\n", r, u, s, ru.ru_maxrss, ru.ru_majflt, ru.ru_minflt, ru.ru_inblock, ru.ru_oublock, ru.ru_nvcsw, ru.ru_nivcsw); } else fprintf(stderr, "real %f\nuser %f\nsys %f\n", r, u, s); toys.exitval = WIFEXITED(stat) ? WEXITSTATUS(stat) : WTERMSIG(stat); } }