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| -rw-r--r-- | toys/posix/time.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/toys/posix/time.c b/toys/posix/time.c new file mode 100644 index 00000000..0ccba19c --- /dev/null +++ b/toys/posix/time.c @@ -0,0 +1,48 @@ +/* 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^p", TOYFLAG_USR|TOYFLAG_BIN)) + +config TIME + bool "time" + default y + help + usage: time [-p] 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 mode (ignored) +*/ + +#include "toys.h" + +void time_main(void) +{ + pid_t pid; + struct timeval tv, tv2; + + gettimeofday(&tv, NULL); + if (!(pid = fork())) 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); + fprintf(stderr, "real %f\nuser %f\nsys %f\n", r, u, s); + toys.exitval = WIFEXITED(stat) ? WEXITSTATUS(stat) : WTERMSIG(stat); + } +} |