hush/miscutils/readahead.c
Denis Vlasenko 6bef3d1d22 fbset: fix buglet where we were using wrong pointer
readahead: stop using stdio.h
*: style fixes
2007-11-06 03:05:54 +00:00

34 lines
751 B
C

/* 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) MAIN_EXTERNALLY_VISIBLE;
int readahead_main(int argc, char **argv)
{
int retval = EXIT_SUCCESS;
if (argc == 1) bb_show_usage();
while (*++argv) {
int fd = open_or_warn(*argv, O_RDONLY);
if (fd >= 0) {
int r = readahead(fd, 0, fdlength(fd));
close(fd);
if (r >= 0) continue;
}
retval = EXIT_FAILURE;
}
return retval;
}