[PATCH] avoid unwanted sensors-detect termination when the /dev/port is missing

[Jaromir Capik <jcapik@xxxxxxxxxx>]

Hello guys.

The device file /dev/port might be missing in some cases
and the sensors detection is terminated when the user
tries to detect sensors dependent on it's existence.
That's not correct -> it's not a reason for terminating
the detection.
The attached patch solves the issue, so that a warning
is displayed and the detection continues.

The patch can be applied on the current trunk version.
Please, check the patch and merge it if possible.

Thank you.

Regards,
Jaromir.

--
Jaromir Capik
Red Hat Czech, s.r.o.
Software Engineer / BaseOS

Email: jcapik@xxxxxxxxxx
Web: www.cz.redhat.com
Red Hat Czech s.r.o., Purkynova 99/71, 612 45, Brno, Czech Republic
IC: 27690016 

--- sensors-detect.orig	2013-01-17 16:04:10.000000000 +0100
+++ sensors-detect	2013-01-17 16:05:32.209400430 +0100
@@ -2471,9 +2471,12 @@
 
 sub initialize_ioports
 {
-	sysopen(IOPORTS, "/dev/port", O_RDWR)
-		or die "/dev/port: $!\n";
-	binmode(IOPORTS);
+	if (sysopen(IOPORTS, "/dev/port", O_RDWR)) {
+		binmode(IOPORTS);
+		return 1;
+	}
+	print "/dev/port: $!\n";
+	return 0;
 }
 
 sub close_ioports
@@ -3511,13 +3514,14 @@
 				print("Can't set I2C address for $dev\n"),
 				next;
 
-			initialize_ioports();
-			$alias_detect = $detected->[$isa]->{alias_detect};
-			$is_alias = &$alias_detect($detected->[$isa]->{isa_addr},
-						   \*FILE,
-						   $detected->[$i2c]->{i2c_addr});
+			if (initialize_ioports()) {
+				$alias_detect = $detected->[$isa]->{alias_detect};
+				$is_alias = &$alias_detect($detected->[$isa]->{isa_addr},
+							   \*FILE,
+							   $detected->[$i2c]->{i2c_addr});
+				close_ioports();
+			}
 			close(FILE);
-			close_ioports();
 
 			next unless $is_alias;
 			# This is an alias: copy the I2C data into the ISA
@@ -6819,10 +6823,11 @@
 		      "standard I/O ports to probe them. This is usually safe.\n";
 		print "Do you want to scan for Super I/O sensors? (YES/no): ";
 		unless (<STDIN> =~ /^\s*n/i) {
-			initialize_ioports();
-			$superio_features |= scan_superio(0x2e, 0x2f);
-			$superio_features |= scan_superio(0x4e, 0x4f);
-			close_ioports();
+			if (initialize_ioports()) {
+				$superio_features |= scan_superio(0x2e, 0x2f);
+				$superio_features |= scan_superio(0x4e, 0x4f);
+				close_ioports();
+			}
 		}
 		print "\n";
 
@@ -6835,9 +6840,10 @@
 			      "interfaces? (YES/no): ";
 			unless (<STDIN> =~ /^\s*n/i) {
 				if (!ipmi_from_smbios()) {
-					initialize_ioports();
-					scan_isa_bus(\@ipmi_ifs);
-					close_ioports();
+					if (initialize_ioports()) {
+						scan_isa_bus(\@ipmi_ifs);
+						close_ioports();
+					}
 				}
 			}
 			print "\n";
@@ -6851,9 +6857,10 @@
 		$input = <STDIN>;
 		unless ($input =~ /^\s*n/i
 		     || ($superio_features && $input !~ /^\s*y/i)) {
-			initialize_ioports();
-			scan_isa_bus(\@chip_ids);
-			close_ioports();
+			if (initialize_ioports()) {
+				scan_isa_bus(\@chip_ids);
+				close_ioports();
+			}
 		}
 		print "\n";
 	}

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