/* clock_of.c:  to measure the execution time of a program. */

/* 2002/08      kmatsui */

#include    "stdio.h"

#include    "stdlib.h"

#include    "string.h"

#include    "time.h"

void    usage( void);

int     main( int argc, char ** argv)

{

    char    command[ BUFSIZ];

    char    **arg, *buf;

    long    start_time, passed_time;

    int     ret;

    if (argc < 2)

        usage();

    ret = -1;

    arg = argv;

    buf = command;

    while (*++arg) {

        sprintf( buf, "%s ", *arg);

        buf += strlen( buf);

    }

    fprintf( stderr, "%s\n", command);

    start_time = clock();

    ret = system( command);

    if (ret == 0) {

        passed_time = clock() - start_time;

        fprintf( stderr, "%ld ticks passed (%f seconds).\n"

                , passed_time, (double) passed_time / CLOCKS_PER_SEC);

    } else {

        fprintf( stderr, "Command execution error! (status: %d)\n", ret);

    }

    return 0;

}

void    usage( void)

{

    fputs( "usage: clock_of <command> [<args>]\n", stderr);

    exit( 1);

}