source: dotfiles/guix/.config/i3blocks/memory@ 53e5e13

#!/bin/sh
# Copyright (C) 2014 Julien Bonjean <julien@bonjean.info>

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

TYPE="${BLOCK_INSTANCE:-mem}"

awk -v type=$TYPE '
/^MemTotal:/ {
        mem_total=$2
}
/^MemFree:/ {
        mem_free=$2
}
/^Buffers:/ {
        mem_free+=$2
}
/^Cached:/ {
        mem_free+=$2
}
/^SwapTotal:/ {
        swap_total=$2
}
/^SwapFree:/ {
        swap_free=$2
}
END {
        if (type == "swap") {
                free=swap_free/1024
                used=(swap_total-swap_free)/1024
                total=swap_total/1024
        } else {
                free=mem_free/1024
                used=(mem_total-mem_free)/1024
                total=mem_total/1024
        }

        pct=0
        if (total > 0) {
                pct=used/total*100
        }

        # full text
        printf("%s%.1i/%.1iMiB\n", "RAM: ", used, total)

        # color
        if (pct > 90) {
                print("#FF0000")
        } else if (pct > 80) {
                print("#FFAE00")
        } else if (pct > 70) {
                print("#FFF600")
        }
}
' /proc/meminfo