/*
* Mini free implementation for busybox
*
- * Copyright (C) 1999,2000 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
+ * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
*/
-#include "internal.h"
+/* getopt not needed */
+
#include <stdio.h>
#include <errno.h>
-
-const char free_usage[] =
- "free\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nDisplays the amount of free and used system memory\n"
-#endif
- ;
+#include <stdlib.h>
+#include "busybox.h"
extern int free_main(int argc, char **argv)
{
struct sysinfo info;
sysinfo(&info);
- /* Kernels prior to 2.4.x will return info.mem_unit==0. Kernels after
- * 2.4.x actually fill this value in */
+
+ /* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
if (info.mem_unit==0) {
- /* Looks like we have a kernel prior to Linux 2.4.x */
- info.mem_unit=1024;
- info.totalram/=info.mem_unit;
- info.freeram/=info.mem_unit;
- info.totalswap/=info.mem_unit;
- info.freeswap/=info.mem_unit;
- info.sharedram/=info.mem_unit;
- info.bufferram/=info.mem_unit;
- } else {
- /* Bah. Linux 2.4.x completely changed sysinfo. This can in theory
- overflow a 32 bit unsigned long, but who puts more then 4GiB ram+swap
- on an embedded system? */
- info.mem_unit/=1024;
- info.totalram*=info.mem_unit;
- info.freeram*=info.mem_unit;
- info.totalswap*=info.mem_unit;
- info.freeswap*=info.mem_unit;
- info.sharedram*=info.mem_unit;
- info.bufferram*=info.mem_unit;
+ info.mem_unit=1;
}
+ info.mem_unit*=1024;
+
+ /* TODO: Make all this stuff not overflow when mem >= 4 Gib */
+ info.totalram/=info.mem_unit;
+ info.freeram/=info.mem_unit;
+ info.totalswap/=info.mem_unit;
+ info.freeswap/=info.mem_unit;
+ info.sharedram/=info.mem_unit;
+ info.bufferram/=info.mem_unit;
+
if (argc > 1 && **(argv + 1) == '-')
- usage(free_usage);
+ show_usage();
printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free",
"shared", "buffers");
printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap,
(info.totalram-info.freeram)+(info.totalswap-info.freeswap),
info.freeram+info.freeswap);
- return(TRUE);
+ return EXIT_SUCCESS;
}