1 /* free.c - Display amount of free and used memory in the system. 2 * 3 * Copyright 2012 Elie De Brauwer <eliedebrauwer (at) gmail.com> 4 5 // Flag order is signifcant: b-t are units in order, FLAG_h-1 is unit mask 6 USE_FREE(NEWTOY(free, "htgmkb[!htgmkb]", TOYFLAG_USR|TOYFLAG_BIN)) 7 8 config FREE 9 bool "free" 10 default y 11 help 12 usage: free [-bkmgt] 13 14 Display the total, free and used amount of physical memory and swap space. 15 16 -bkmgt Output units (default is bytes) 17 -h Human readable (K=1024) 18 */ 19 20 #define FOR_free 21 #include "toys.h" 22 23 GLOBALS( 24 unsigned bits; 25 unsigned long long units; 26 char *buf; 27 ) 28 29 static char *convert(unsigned long d) 30 { 31 long long ll = d*TT.units; 32 char *s = TT.buf; 33 34 if (toys.optflags & FLAG_h) human_readable(s, ll, 0); 35 else sprintf(s, "%llu",ll>>TT.bits); 36 TT.buf += strlen(TT.buf)+1; 37 38 return s; 39 } 40 41 void free_main(void) 42 { 43 struct sysinfo in; 44 45 sysinfo(&in); 46 TT.units = in.mem_unit ? in.mem_unit : 1; 47 while ((toys.optflags&(FLAG_h-1)) && !(toys.optflags&(1<<TT.bits))) TT.bits++; 48 TT.bits *= 10; 49 TT.buf = toybuf; 50 51 xprintf("\t\ttotal used free shared buffers\n" 52 "Mem:%17s%12s%12s%12s%12s\n-/+ buffers/cache:%15s%12s\n" 53 "Swap:%16s%12s%12s\n", convert(in.totalram), 54 convert(in.totalram-in.freeram), convert(in.freeram), convert(in.sharedram), 55 convert(in.bufferram), convert(in.totalram - in.freeram - in.bufferram), 56 convert(in.freeram + in.bufferram), convert(in.totalswap), 57 convert(in.totalswap - in.freeswap), convert(in.freeswap)); 58 } 59
