busybox/procps/free.c

/* vi: set sw=4 ts=4: */
/*
 * Mini free implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under the GPL version 2, see the file LICENSE in this tarball.
 */

/* getopt not needed */

#include "libbb.h"
#include <sys/sysinfo.h>

int free_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int free_main(int argc UNUSED_PARAM, char **argv IF_NOT_DESKTOP(UNUSED_PARAM))
{
	struct sysinfo info;
	unsigned mem_unit;

#if ENABLE_DESKTOP
	if (argv[1] && argv[1][0] == '-')
		bb_show_usage();
#endif

	sysinfo(&info);

	/* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
	mem_unit = 1;
	if (info.mem_unit != 0) {
		mem_unit = info.mem_unit;
	}

	/* Convert values to kbytes */
	if (mem_unit == 1) {
		info.totalram >>= 10;
		info.freeram >>= 10;
#if BB_MMU
		info.totalswap >>= 10;
		info.freeswap >>= 10;
#endif
		info.sharedram >>= 10;
		info.bufferram >>= 10;
	} else {
		mem_unit >>= 10;
		/* TODO:  Make all this stuff not overflow when mem >= 4 Tb */
		info.totalram *= mem_unit;
		info.freeram *= mem_unit;
#if BB_MMU
		info.totalswap *= mem_unit;
		info.freeswap *= mem_unit;
#endif
		info.sharedram *= mem_unit;
		info.bufferram *= mem_unit;
	}

	printf("      %13s%13s%13s%13s%13s\n",
		"total",
		"used",
		"free",
		"shared", "buffers" /* swap and total don't have these columns */
	);
	printf("%6s%13lu%13lu%13lu%13lu%13lu\n", "Mem:",
		info.totalram,
		info.totalram - info.freeram,
		info.freeram,
		info.sharedram, info.bufferram
	);
#if BB_MMU
	printf("%6s%13lu%13lu%13lu\n", "Swap:",
		info.totalswap,
		info.totalswap - info.freeswap,
		info.freeswap
	);
	printf("%6s%13lu%13lu%13lu\n", "Total:",
		info.totalram + info.totalswap,
		(info.totalram - info.freeram) + (info.totalswap - info.freeswap),
		info.freeram + info.freeswap
	);
#endif
	return EXIT_SUCCESS;
}
1	niro	532	/* vi: set sw=4 ts=4: */
2			/*
3			* Mini free implementation for busybox
4			*
5			* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6			*
7			* Licensed under the GPL version 2, see the file LICENSE in this tarball.
8			*/
9
10			/* getopt not needed */
11
12	niro	816	#include "libbb.h"
13	niro	1520	#include <sys/sysinfo.h>
14	niro	532
15	niro	816	int free_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
16	niro	1123	int free_main(int argc UNUSED_PARAM, char **argv IF_NOT_DESKTOP(UNUSED_PARAM))
17	niro	532	{
18			struct sysinfo info;
19	niro	1123	unsigned mem_unit;
20
21			#if ENABLE_DESKTOP
22			if (argv[1] && argv[1][0] == '-')
23			bb_show_usage();
24			#endif
25
26	niro	532	sysinfo(&info);
27
28			/* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
29	niro	1123	mem_unit = 1;
30			if (info.mem_unit != 0) {
31			mem_unit = info.mem_unit;
32	niro	532	}
33
34	niro	1123	/* Convert values to kbytes */
35			if (mem_unit == 1) {
36			info.totalram >>= 10;
37			info.freeram >>= 10;
38			#if BB_MMU
39			info.totalswap >>= 10;
40			info.freeswap >>= 10;
41	niro	532	#endif
42	niro	1123	info.sharedram >>= 10;
43			info.bufferram >>= 10;
44	niro	532	} else {
45	niro	1123	mem_unit >>= 10;
46			/* TODO: Make all this stuff not overflow when mem >= 4 Tb */
47			info.totalram *= mem_unit;
48			info.freeram *= mem_unit;
49			#if BB_MMU
50			info.totalswap *= mem_unit;
51			info.freeswap *= mem_unit;
52	niro	532	#endif
53	niro	1123	info.sharedram *= mem_unit;
54			info.bufferram *= mem_unit;
55	niro	532	}
56
57	niro	1123	printf(" %13s%13s%13s%13s%13s\n",
58			"total",
59			"used",
60			"free",
61			"shared", "buffers" /* swap and total don't have these columns */
62			);
63			printf("%6s%13lu%13lu%13lu%13lu%13lu\n", "Mem:",
64			info.totalram,
65			info.totalram - info.freeram,
66			info.freeram,
67			info.sharedram, info.bufferram
68			);
69			#if BB_MMU
70			printf("%6s%13lu%13lu%13lu\n", "Swap:",
71			info.totalswap,
72			info.totalswap - info.freeswap,
73			info.freeswap
74			);
75			printf("%6s%13lu%13lu%13lu\n", "Total:",
76			info.totalram + info.totalswap,
77			(info.totalram - info.freeram) + (info.totalswap - info.freeswap),
78			info.freeram + info.freeswap
79			);
80	niro	532	#endif
81			return EXIT_SUCCESS;
82			}