This depmod script will create a modules.dep file, just like the depmod
[oweals/busybox.git] / free.c
1 /* vi: set sw=4 ts=4: */
2 /*
3  * Mini free implementation for busybox
4  *
5  * Copyright (C) 1999,2000,2001 by Lineo, inc.
6  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21  *
22  */
23
24 /* getopt not needed */
25
26 #include <stdio.h>
27 #include <errno.h>
28 #include <stdlib.h>
29 #include "busybox.h"
30
31 extern int free_main(int argc, char **argv)
32 {
33         struct sysinfo info;
34         sysinfo(&info);
35
36         /* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
37         if (info.mem_unit==0) {
38                 info.mem_unit=1;
39         }
40         info.mem_unit*=1024;
41         
42         /* TODO:  Make all this stuff not overflow when mem >= 4 Gib */
43         info.totalram/=info.mem_unit;
44         info.freeram/=info.mem_unit;
45         info.totalswap/=info.mem_unit;
46         info.freeswap/=info.mem_unit;
47         info.sharedram/=info.mem_unit;
48         info.bufferram/=info.mem_unit;
49
50         if (argc > 1 && **(argv + 1) == '-')
51                 show_usage();
52
53         printf("%6s%13s%13s%13s%13s%13s\n", "", "total", "used", "free", 
54                         "shared", "buffers");
55
56         printf("%6s%13ld%13ld%13ld%13ld%13ld\n", "Mem:", info.totalram, 
57                         info.totalram-info.freeram, info.freeram, 
58                         info.sharedram, info.bufferram);
59
60         printf("%6s%13ld%13ld%13ld\n", "Swap:", info.totalswap,
61                         info.totalswap-info.freeswap, info.freeswap);
62
63         printf("%6s%13ld%13ld%13ld\n", "Total:", info.totalram+info.totalswap,
64                         (info.totalram-info.freeram)+(info.totalswap-info.freeswap),
65                         info.freeram+info.freeswap);
66         return EXIT_SUCCESS;
67 }
68
69