Last change
on this file since 3676 was 1765, checked in by Bruno Cornec, 17 years ago |
Update to busybox 1.7.2
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-
Property svn:eol-style
set to
native
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File size:
748 bytes
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Rev | Line | |
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[1765] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * readahead implementation for busybox
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| 4 | *
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| 5 | * Preloads the given files in RAM, to reduce access time.
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| 6 | * Does this by calling the readahead(2) system call.
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| 7 | *
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| 8 | * Copyright (C) 2006 Michael Opdenacker <michael@free-electrons.com>
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| 9 | *
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| 10 | * Licensed under GPLv2 or later, see file License in this tarball for details.
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| 11 | */
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| 12 |
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| 13 | #include "libbb.h"
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| 14 |
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| 15 | int readahead_main(int argc, char **argv);
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| 16 | int readahead_main(int argc, char **argv)
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| 17 | {
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| 18 | FILE *f;
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| 19 | int retval = EXIT_SUCCESS;
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| 20 |
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| 21 | if (argc == 1) bb_show_usage();
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| 22 |
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| 23 | while (*++argv) {
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| 24 | if ((f = fopen_or_warn(*argv, "r")) != NULL) {
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| 25 | int r, fd=fileno(f);
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| 26 |
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| 27 | r = readahead(fd, 0, fdlength(fd));
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| 28 | fclose(f);
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| 29 | if (r >= 0) continue;
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| 30 | }
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| 31 | retval = EXIT_FAILURE;
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| 32 | }
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| 33 |
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| 34 | return retval;
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| 35 | }
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