source: MondoRescue/branches/2.2.5/mindi-busybox/miscutils/readahead.c@ 1765

/* vi: set sw=4 ts=4: */
/*
 * readahead implementation for busybox
 *
 * Preloads the given files in RAM, to reduce access time.
 * Does this by calling the readahead(2) system call.
 *
 * Copyright (C) 2006  Michael Opdenacker <michael@free-electrons.com>
 *
 * Licensed under GPLv2 or later, see file License in this tarball for details.
 */

#include "libbb.h"

int readahead_main(int argc, char **argv);
int readahead_main(int argc, char **argv)
{
    FILE *f;
    int retval = EXIT_SUCCESS;

    if (argc == 1) bb_show_usage();

    while (*++argv) {
        if ((f = fopen_or_warn(*argv, "r")) != NULL) {
            int r, fd=fileno(f);

            r = readahead(fd, 0, fdlength(fd));
            fclose(f);
            if (r >= 0) continue;
        }
        retval = EXIT_FAILURE;
    }

    return retval;
}