source: tests/process/test/test.cpp@ 1163

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>

#ifdef __OS2__
#include <io.h>
#endif

#ifdef WIN32
#define sleep(sec) _sleep(sec*1000)
#endif

static int bail (const char *msg)
{
    fprintf (stderr, "TEST ERROR: %s: %s (%d)\n", msg, strerror(errno), errno);
    return errno;
}

#define BUF_SIZE 4096

int main(/*int argc, char *argv[]*/)
{
#if 1

        //sleep(3);
        int rc = write(fileno(stdout), "test-test", 9);
        fprintf(stderr, "rc=%d %s\n", rc, strerror(errno));
        //sleep(3);
        rc = write(fileno(stdout), "\nend", 4);
        fprintf(stderr, "rc=%d %s\n", rc, strerror(errno));
        //sleep(3);
        return 0;

#else

    int rc;

    setmode(fileno(stdout), O_BINARY);

    const char *fname = "D:\\Users\\dmik\\fingerabdruck.mpg";

    int fd = open(fname, O_RDONLY | O_BINARY);
    if (fd == -1)
        return bail("open");

    timeval timeStart;
    gettimeofday(&timeStart, 0);

    int size = 0;
    char buf[BUF_SIZE];
    do {
        rc = read(fd, buf, sizeof(buf));
        if (rc == -1) {
            bail("read");
            break;
        }
        if (rc == 0)
            break;
//      fprintf(stderr, ".");
        size += rc;
        rc = write(fileno(stdout), buf, rc);
        if (rc == -1) {
            bail("read");
            break;
        }
    } while (true);

    timeval timeEnd;
    gettimeofday(&timeEnd, 0);

    close(fd);

//  fprintf(stderr, "\n");

    unsigned long long elapsed = timeEnd.tv_sec * 1000ll + timeEnd.tv_usec / 1000ll;
    elapsed -= (timeStart.tv_sec * 1000ll + timeStart.tv_usec / 1000ll);

    unsigned long long speed = size * 1000ull;
    speed /= elapsed;

    if (rc != -1) {
        fprintf(stderr, "Wrote %s\n", fname);
        fprintf(stderr, "Size %d bytes\n", size);
        fprintf(stderr, "Time %llu ms\n", elapsed);
        fprintf(stderr, "Speed %llu bytes/sec\n", speed);
    }

#endif
}