scsi_id: switch temporary node creation to /dev

/tmp is not writable on most systems, so just use /dev to create a
temporary node. If called from a udev rule, "-d $tempnode" should be
used and udev will create a temporary node and pass the name before
calling scsi_id.
Also remove gen_scsi_id_udev_rules.sh per Patrick's request, as it's
no longer needed with the persistent disk links.

Signed-off-by: Kay Sievers <kay.sievers@suse.de>

extras/scsi_id/gen_scsi_id_udev_rules.sh

@@ -1,80 +0,0 @@
-#! /bin/sh
-
-# This script generates and sends to stdout a set of udev.rules for use
-# with all scsi block devices on your system. It creates a udev key NAME
-# with prefix defaulting to "disk-", and appends the current kernel name
-# and the udev kernel number (the partition number, empty for the entire
-# disk).
-#
-# Managing these is probably better done via a gui interface.
-#
-# You can edit and append the output to your /etc/udev/udev.rules file.
-# You probably want to to change names to be non-kernel defaults, so as to
-# avoid confusion if a configuration change modifies /sys/block/sd*
-# naming.
-#
-# /etc/scsi_id.config must be properly configured. If you are using this
-# script, you probably want a single line enabling scsi_id for all
-# devices as follows:
-#
-# options=-g
-#
-# The above assumes you will not attach block devices that do not
-# properly support the page codes used by scsi_id, this is especially true
-# of many USB mass storage devices (mainly flash card readers).
-#
-
-prefix=disk-
-scsi_id=/sbin/scsi_id
-
-sysfs_dir=$(mount | awk '$5 == "sysfs" {print $3}')
-if [ "$sysfs_dir" = "" ]
-then
-	sysfs_dir="/sys"
-	echo "Using sysfs mount point \"$sysfs_dir\"" >&2
-fi
-
-c=$(ls /${sysfs_dir}/block/sd* 2>/dev/null | wc -l)
-if [ $c = 0 ]
-then
-	echo $0 no block devices present >&2
-	exit 1
-fi
-
-echo "#"
-echo "# Start of autogenerated scsi_id rules. Edit the NAME portions of these"
-echo "# rules to your liking."
-echo "#"
-first_line=yes
-
-#
-cd ${sysfs_dir}/block
-for name in sd*
-do
-	id=$($scsi_id -s /block/$name)
-	if [ $? != 0 ]
-	then
-		echo $0 failed for device $name exiting >&2
-		exit 1
-	fi
-	if [ $first_line = "yes" ]
-	then
-		first_line=no
-		echo "BUS=\"scsi\", PROGRAM=\"${scsi_id} -d %N -s %p\", RESULT=\"${id}\", NAME=\"${prefix}${name}%n\""
-		echo
-		echo "# Further RESULT keys use the result of the last PROGRAM rule."
-		echo "# Be careful not to add any rules containing PROGRAM key between here"
-		echo "# and the end of this section"
-		echo
-	else
-		# No PROGRAM, so just use the last result of PROGRAM. The
-		# following is the same as the above without the PROGRAM
-		# key.
-		echo "BUS=\"scsi\", RESULT=\"${id}\", NAME=\"${prefix}${name}%n\""
-	fi
-
-done
-
-echo "#"
-echo "# End of autogenerated scsi_id rules"
-echo "#"

extras/scsi_id/scsi_id.8

@@ -111,7 +111,10 @@ The sysfs mount point must not be included. For example, use /block/sd,
 not /sys/block/sd.
 .TP
 .BI \-u
-Reformat the output : replace all whitespaces by underscores
+Reformat the output : replace all whitespaces by underscores.
+.TP
+.BI \-x
+Export all data in KEY=<value> format used to import in other programs.
 .TP
 .BI \-v
 Generate verbose debugging output.
@@ -140,13 +143,18 @@ for example:
 .fi
 .P
 
-An example \fBudev\fP rule using \fBscsi_id\fP, that will name a block
+\fBscsi_id\fP is one of the tools used in the "Linux Persistent Device Names"
+scheme that creates persistent device links in /dev/disk. It is called with
+the -x option which will print all values in a defined format to let udev
+import it into its own environment for later event processing.
+.sp
+An example custom \fBudev\fP rule using \fBscsi_id\fP, that will name a block
 device and any partitions for the device matching the \fBscsi_id\fP output
 of 312345:
 
 .sp
 .nf
-BUS="scsi", PROGRAM="/sbin/scsi_id -d %N -s %p", RESULT="312345", NAME="disk%n"
+BUS=="scsi", PROGRAM=="/sbin/scsi_id -d %N -s %p", RESULT=="312345", NAME="disk%n"
 .fi
 .P
 
@@ -158,7 +166,7 @@ BUS="scsi", PROGRAM="/sbin/scsi_id -d %N -s %p", RESULT="312345", NAME="disk%n"
 .fi
 .LP
 .SH "SEE ALSO"
-.BR udev (8), hotplug (8)
+.BR udev (8)
 .SH AUTHORS
 Developed by Patrick Mansfield <patmans@us.ibm.com> based on SCSI ID
 source included in earlier linux 2.5 kernels, sg_utils source, and SCSI

extras/scsi_id/scsi_id.c

@@ -44,8 +44,8 @@
 /*
  * temporary names for mknod.
  */
-#define TMP_DIR	"/tmp"
-#define TMP_PREFIX "scsi"
+#define TMP_DIR	"/dev"
+#define TMP_PREFIX "tmp-scsi"
 
 /*
  * XXX Note the 'e' (send output to stderr in all cases), and 'c' (callout)