fs: pure dfs implementation

[lcpz]

Remove scripts/ definitely and switch to a pure Lua implementation.

[aajjbb]

By 'pure Lua' implementation you mean "No parsing df" ?

[lcpz]

No parsing at all, but using Lua and Awesome APIs.

I was thinking about a wibox to toggle, filled with progress bars.

[psychon]

I'm not yet sure how to get a list of mount points, but at least this is how you can get some disk usage:

gio = require("lgi").Gio
file = gio.File.new_for_path(".")
size, free, used = gio.FILE_ATTRIBUTE_FILESYSTEM_SIZE, gio.FILE_ATTRIBUTE_FILESYSTEM_FREE, gio.FILE_ATTRIBUTE_FILESYSTEM_USED
query = size..","..free..","..used
info = file:query_filesystem_info(query)
print(info:get_attribute_uint64(size), info:get_attribute_uint64(free), info:get_attribute_uint64(used))

[psychon]

I can only offer the following, but it does not list all mount points, only some (yes, I know that this queries free but does not use it):

local Gio = require("lgi").Gio
local volume_monitor = Gio.VolumeMonitor.get()
local query_size = Gio.FILE_ATTRIBUTE_FILESYSTEM_SIZE
local query_free = Gio.FILE_ATTRIBUTE_FILESYSTEM_FREE
local query_used = Gio.FILE_ATTRIBUTE_FILESYSTEM_USED
local query = query_size .. "," .. query_free .. "," .. query_used

for _, mount in ipairs(volume_monitor:get_mounts()) do
	local root = mount:get_root()
	local info = root:query_filesystem_info(query)
	local size = info:get_attribute_uint64(query_size)
	local free = info:get_attribute_uint64(query_free)
	local used = info:get_attribute_uint64(query_used)
	local percentage = 100 * used / size
	print(string.format("%s '%s' has %.3f%% used", root:get_path(), mount:get_name(), percentage))
end

Output:

/ 'Filesystem root' has 21.000% used
/boot/efi 'efi' has 0.025% used
/mnt/space 'space' has 7.938% used

[unode]

Do we have any progress on this?

Currently I'm experiencing problems with the notification pop-up.
Running the dfs script manually works fine but the pop-up only shows:

                                                       Used     Free    Total

[lcpz]

@unode Nothing has changed in dfs since #270.

[unode]

@copycat-killer this started happening after upgrading to awesome 4.0. Don't know why yet. I'll open another issue on it.

[otommod]

There's also this API

local Gio = require("lgi").Gio
for _, m in ipairs(Gio.unix_mounts_get()) do
    print(Gio.unix_mount_get_mount_path(m))
end

which seems to return everything df -a does, e.g. for me

/sys
/proc
/dev
/sys/kernel/security
/dev/shm
/dev/pts
/run
/sys/fs/cgroup
/sys/fs/cgroup/unified
/sys/fs/cgroup/systemd
/sys/fs/pstore
/sys/fs/cgroup/net_cls,net_prio
/sys/fs/cgroup/cpu,cpuacct
/sys/fs/cgroup/cpuset
/sys/fs/cgroup/blkio
/sys/fs/cgroup/perf_event
/sys/fs/cgroup/devices
/sys/fs/cgroup/pids
/sys/fs/cgroup/rdma
/sys/fs/cgroup/freezer
/sys/fs/cgroup/memory
/
/dev/mqueue
/proc/sys/fs/binfmt_misc
/tmp
/sys/kernel/config
/dev/hugepages
/sys/kernel/debug
/boot
/home
/run/user/1000
/run/user/1000/gvfs
/sys/fs/fuse/connections
/proc/sys/fs/binfmt_misc

Contrast that to #272 (comment) which outputs nothing for me for some reason.

[psychon]

@otommod Thanks for finding that. Here is it incorporated into the script from my last comment:

local Gio = require("lgi").Gio
local query_size = Gio.FILE_ATTRIBUTE_FILESYSTEM_SIZE
local query_free = Gio.FILE_ATTRIBUTE_FILESYSTEM_FREE
local query_used = Gio.FILE_ATTRIBUTE_FILESYSTEM_USED
local query = query_size .. "," .. query_free .. "," .. query_used

for _, mount in ipairs(Gio.unix_mounts_get()) do
	local path = Gio.unix_mount_get_mount_path(mount)
	local root = Gio.File.new_for_path(path)
	local info = root:query_filesystem_info(query)
	local size = info:get_attribute_uint64(query_size)
	local free = info:get_attribute_uint64(query_free)
	local used = info:get_attribute_uint64(query_used)
	local percentage = 100 * used / size
	print(string.format("%s has %.3f%% used (%d used of %d)", path, percentage, used, size))
end

[lcpz]

@otommod @psychon Thank you both.

I'm going to do this ASAP, but any help is welcome.

[lcpz]

Closed by mistake. Reopening.

[lcpz]

Done. Also, new API introduced. Read the wiki.