1 /* free.c - Display amount of free and used memory in the system.
2 *
3 * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
4
5 USE_FREE(NEWTOY(free, "tgmkb[!tgmkb]", TOYFLAG_USR|TOYFLAG_BIN))
6
7 config FREE
8 bool "free"
9 default y
10 help
11 usage: free [-bkmgt]
12
13 Display the total, free and used amount of physical memory and swap space.
14
15 -bkmgt Output units (default is bytes)
16 */
17
18 #define FOR_free
19 #include "toys.h"
20
GLOBALS(unsigned bits;unsigned long long units;)21 GLOBALS(
22 unsigned bits;
23 unsigned long long units;
24 )
25
26 static unsigned long long convert(unsigned long d)
27 {
28 return (d*TT.units)>>TT.bits;
29 }
30
free_main(void)31 void free_main(void)
32 {
33 struct sysinfo in;
34
35 sysinfo(&in);
36 TT.units = in.mem_unit ? in.mem_unit : 1;
37 for (TT.bits = 0; toys.optflags && !(toys.optflags&(1<<TT.bits)); TT.bits++);
38 TT.bits *= 10;
39
40 xprintf("\t\ttotal used free shared buffers\n"
41 "Mem:%17llu%12llu%12llu%12llu%12llu\n-/+ buffers/cache:%15llu%12llu\n"
42 "Swap:%16llu%12llu%12llu\n", convert(in.totalram),
43 convert(in.totalram-in.freeram), convert(in.freeram), convert(in.sharedram),
44 convert(in.bufferram), convert(in.totalram - in.freeram - in.bufferram),
45 convert(in.freeram + in.bufferram), convert(in.totalswap),
46 convert(in.totalswap - in.freeswap), convert(in.freeswap));
47 }
48