os: import operating system information widget

This widget type returns 1st value as the operating system in use, 2nd
as the release version, 3rd as your username and 4th the hostname.

3 files changed, 64 insertions, 0 deletions

diff --git a/README b/README
index b32ce86..50fe2ed 100644
--- a/README
+++ b/README
@@ -210,6 +210,11 @@ vicious.widgets.mem
     in percent, 6th as swap usage, 7th as total system swap and 8th as
     free swap
 
+vicious.widgets.os
+  - provides operating system information
+  - returns 1st value as the operating system in use, 2nd as the
+    release version, 3rd as your username and 4th the hostname
+
 vicious.widgets.fs
   - provides file system disk space usage
   - takes an (optional) argument which, if true, includes remote file
diff --git a/init.lua b/init.lua
index 04d5b0c..7acf779 100644
--- a/init.lua
+++ b/init.lua
@@ -28,6 +28,7 @@ require("vicious.thermal")
 require("vicious.uptime")
 require("vicious.bat")
 require("vicious.mem")
+require("vicious.os")
 require("vicious.fs")
 require("vicious.dio")
 require("vicious.hddtemp")
diff --git a/os.lua b/os.lua
new file mode 100644
index 0000000..eb0a2b1
--- /dev/null
+++ b/os.lua
@@ -0,0 +1,58 @@
+---------------------------------------------------
+-- Licensed under the GNU General Public License v2
+--  * (c) 2010, Adrian C. <anrxc@sysphere.org>
+---------------------------------------------------
+
+-- {{{ Grab environment
+local pairs = pairs
+local io = { popen = io.popen }
+local os = { getenv = os.getenv }
+local setmetatable = setmetatable
+local helpers = require("vicious.helpers")
+local string = {
+    gsub = string.gsub,
+    match = string.match
+}
+-- }}}
+
+
+-- OS: provides operating system information
+module("vicious.os")
+
+
+-- {{{ Operating system widget type
+local function worker(format)
+    local system = {
+        ["ostype"]    = "N/A",
+        ["hostname"]  = "N/A",
+        ["osrelease"] = "N/A",
+        ["username"]  = "N/A"
+    }
+
+    -- Linux manual page: uname(2)
+    local kernel = helpers.pathtotable("/proc/sys/kernel")
+    for k, v in pairs(system) do
+        if kernel[k] then
+            system[k] = string.gsub(kernel[k], "[%s]*$", "")
+        end
+    end
+
+    -- BSD manual page: uname(1)
+    if system["ostype"] == "N/A" then
+        local f = io.popen("uname -snr")
+        local uname = f:read("*line")
+        f:close()
+
+        system["ostype"], system["hostname"], system["osrelease"] =
+            string.match(uname, "([%w]+)[%s]([%w%p]+)[%s]([%w%p]+)")
+    end
+
+    -- Get user from the environment
+    system["username"] = os.getenv("USER")
+
+    return {system["ostype"],   system["osrelease"],
+            system["username"], system["hostname"]}
+end
+-- }}}
+
+setmetatable(_M, { __call = function(_, ...) return worker(...) end })