From 36292f85732f6ba51df2acee74a561f588eb430c Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Mon, 29 May 2006 03:33:29 +0000
Subject: owfs is weird

git-svn-id: svn+ssh://asteria.noreply.org/svn/weaselutils/trunk@108 bc3d92e2-beff-0310-a7cd-cc87d7ac0ede
---
 munin/owfs_temperature_ | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

(limited to 'munin')

diff --git a/munin/owfs_temperature_ b/munin/owfs_temperature_
index 3c87c21..dfdf883 100755
--- a/munin/owfs_temperature_
+++ b/munin/owfs_temperature_
@@ -75,9 +75,29 @@ end
 
 def report
 	device = query_device
-	temp = File.new($owfs_path+'/'+device+'/temperature').read
-	n = normalize_sensor device
-	puts "#{n}.value #{temp}"
+	Process.gid=0
+	Process.egid=0
+	temp = nil
+	# fuse does weird checks.  this fails:
+	# File.new($owfs_path+'/'+device+'/temperature', "r") ---> FAILS: in `initialize': Permission denied - /var/lib/owfs/10.D234EE000800/temperature (Errno::EACCES)
+	IO.popen("-") do |f|
+		unless f  # child
+			begin
+				exec('cat', $owfs_path+'/'+device+'/temperature')
+			rescue => e
+				puts "Cannot exec cat: "+e.message
+				exit 1
+			end
+		end
+		temp = f.readlines
+	end
+
+	if $? != 0
+		STDERR.puts "Child exited with non-zero exit code(%d): %s"%[$? >> 8, temp.join('')]
+	else
+		n = normalize_sensor device
+		puts "#{n}.value #{temp.join('')}"
+	end
 end
 
 
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