diff options
Diffstat (limited to 'toys/free.c')
| -rw-r--r-- | toys/free.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/toys/free.c b/toys/free.c new file mode 100644 index 00000000..529da19a --- /dev/null +++ b/toys/free.c @@ -0,0 +1,61 @@ +/* vi: set sw=4 ts=4: + * + * free.c - Display amount of free and used memory in the system. + * + * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com> + * + * Not in SUSv3. + +USE_FREE(NEWTOY(free, "gmkb", TOYFLAG_USR|TOYFLAG_BIN)) + +config FREE + bool "free" + default y + help + usage: free [-bkmg] + + Display the total, free and used amount of physical memory and + swap space. + -bkmg Output in bytes (default), KB, MB or GB +*/ + +#include "toys.h" +#include <sys/sysinfo.h> + + +static unsigned long long convert(unsigned long d, unsigned int iscale, + unsigned int oscale) +{ + return ((unsigned long long)d*iscale)>>oscale; +} + +void free_main(void) +{ + struct sysinfo info; + unsigned int iscale = 1; + unsigned int oscale = 0; + + sysinfo(&info); + if (info.mem_unit) iscale = info.mem_unit; + if (toys.optflags & 1) oscale = 0; + if (toys.optflags & 2) oscale = 10; + if (toys.optflags & 4) oscale = 20; + if (toys.optflags & 8) oscale = 30; + + printf(" total used free shared buffers\n"); + printf("Mem: %12llu%12llu%12llu%12llu%12llu\n", + convert(info.totalram, iscale, oscale), + convert(info.totalram-info.freeram, iscale, oscale), + convert(info.freeram, iscale, oscale), + convert(info.sharedram, iscale, oscale), + convert(info.bufferram, iscale, oscale)); + + printf("-/+ buffers/cache: %12llu%12llu\n", + convert(info.totalram - info.freeram - info.bufferram, iscale, oscale), + convert(info.freeram + info.bufferram, iscale, oscale)); + + printf("Swap: %12llu%12llu%12llu\n", + convert(info.totalswap, iscale, oscale), + convert(info.totalswap - info.freeswap, iscale, oscale), + convert(info.freeswap, iscale, oscale)); +} |