I have the following script
{
/system resource
:local totalhdd [get total-hdd-space]
:local freehdd [get free-hdd-space]
:local percfree ($totalhdd-$freehdd/$totalhdd*100)
:put "Free Space: $freehdd"
:put "Total Space: $totalhdd"
:put ($percfree."% freehdd space")
}
but I don’t get the desired result, please help me.
Ah, divide… This one is dozy. I’m not sure this is readily possible since Mikrotik doesn’t support “floating point” numbers (e.g. with decimal point in US). They do integers, which are whole/counting numbers. When you divide numbers, it reports the nearest whole number. So 5/10 is 0 too. They do support “getting the remainder”, modulo “%”, but this too isn’t much use since the modulo here would be the same as dividend (e.g. the disk freespace it got).
:put (5 / (10))
0
First of all, if for example free-hdd-space=113070080 and total-hdd-space=134217728
this operation
($totalhdd - $freehdd / $totalhdd * 100)
is = to
(134217728 - 113070080 / 134217728 * 100)
and the result inside routeros is (134217728 - 0 * 100) = (134217728 - 0) = 134217728 the total hdd space
Because / and * take precedence over -
The correct operation to have “% freehdd space” from the proportion
$totalhdd : 100 = $freehdd : x
x = (100 * $freehdd) / $totalhdd
The division must be last operation, because RouterOS do not support floating values.
If you want decimals, multiply the numbers by 10, 100, etc. before the division, and use [:pick] for add the comma/dot (language specific)
{
/system resource
:local totalhdd [get total-hdd-space]
:local freehdd [get free-hdd-space]
:local percfree ((100 * $freehdd) / $totalhdd)
:put "Space: Total $totalhdd, Free $freehdd"
:put "$percfree% free disk space, $(100 - $percfree)% busy"
# 2 decimals = 2 significant zeros (for prevent results under 1,00% like _,_0%), number * 100 and :pick the last 2 digit
:local perdec "00$((100 * $freehdd * 100) / $totalhdd)"
:set perdec "$[:tonum [:pick $perdec 0 ([:len $perdec]-2)]],$[:pick $perdec ([:len $perdec]-2) [:len $perdec]]"
:put "$perdec% free disk space"
}
If you want “nice” formatted space(s) value on MiB (RouterOS style is MiB with 1 decimal):
{
/system resource
:local totalhdd [get total-hdd-space]
:local freehdd [get free-hdd-space]
:set totalhdd "0$(($totalhdd * 0xA) / 0x100000)"
:set totalhdd "$[:tonum [:pick $totalhdd 0 ([:len $totalhdd]-1)]],$[:pick $totalhdd ([:len $totalhdd]-1) [:len $totalhdd]]"
:set freehdd "0$(($freehdd * 0xA) / 0x100000)"
:set freehdd "$[:tonum [:pick $freehdd 0 ([:len $freehdd]-1)]],$[:pick $freehdd ([:len $freehdd]-1) [:len $freehdd]]"
:put "Space: Total $totalhdd MiB, Free $freehdd MiB"
}