2ec91aead5
function old new delta whoami_main 34 37 +3 logname_main 60 63 +3 hostid_main 35 38 +3 ttysize_main 136 135 -1 nmeter_main 673 672 -1 logger_main 387 386 -1 uuencode_main 330 328 -2 ifupdown_main 2125 2123 -2 mesg_main 158 155 -3 free_main 333 330 -3 cal_main 902 899 -3 acpid_main 443 440 -3 ar_main 196 189 -7 find_main 476 467 -9 ifconfig_main 1235 1221 -14 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/12 up/down: 9/-49) Total: -40 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
43 lines
907 B
C
43 lines
907 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 UNUSED_PARAM, char **argv)
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{
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int retval = EXIT_SUCCESS;
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if (!argv[1]) {
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bb_show_usage();
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}
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while (*++argv) {
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int fd = open_or_warn(*argv, O_RDONLY);
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if (fd >= 0) {
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off_t len;
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int r;
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/* fdlength was reported to be unreliable - use seek */
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len = xlseek(fd, 0, SEEK_END);
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xlseek(fd, 0, SEEK_SET);
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r = readahead(fd, 0, len);
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close(fd);
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if (r >= 0)
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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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