36 lines
772 B
C
36 lines
772 B
C
/* vi: set sw=4 ts=4: */
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/*
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* readahead implementation for busybox
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*
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* Preloads the given files in RAM, to reduce access time.
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* Does this by calling the readahead(2) system call.
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*
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* Copyright (C) 2006 Michael Opdenacker <michael@free-electrons.com>
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*
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* Licensed under GPLv2 or later, see file License in this tarball for details.
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*/
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#include "libbb.h"
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int readahead_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int readahead_main(int argc, char **argv)
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{
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FILE *f;
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int retval = EXIT_SUCCESS;
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if (argc == 1) bb_show_usage();
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while (*++argv) {
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if ((f = fopen_or_warn(*argv, "r")) != NULL) {
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int r, fd=fileno(f);
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r = readahead(fd, 0, fdlength(fd));
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fclose(f);
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if (r >= 0) continue;
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}
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retval = EXIT_FAILURE;
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}
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return retval;
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}
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