scsi_id: switch temporary node creation to /dev

[elogind.git] / extras / scsi_id / scsi_id.8

diff --git a/extras/scsi_id/scsi_id.8 b/extras/scsi_id/scsi_id.8
index 69dd2a998ada9ca4ab58df578c6a6be8c5ee984e..691d5b8b05677c7cefef479f8a38bc4a2f025307 100644 (file)
--- a/extras/scsi_id/scsi_id.8
+++ b/extras/scsi_id/scsi_id.8
@@ -53,9 +53,14 @@ identifier starts with the NAA value of 6):
 .SH OPTIONS
 .TP
 .BI subsystem
 .SH OPTIONS
 .TP
 .BI subsystem

-When called with only a single argument without a leading \-, runs in a hotplug
-mode, and expects the environment variable DEVPATH to specify the
-corresponding sysfs device. See section below on usage with \fBudev\fP.
+Deprecated method: when called with only a single argument without a
+leading \-, runs in a hotplug mode, and expects the environment variable
+DEVPATH to specify the corresponding sysfs device. See section below on
+usage with \fBudev\fP.
+.TP
+.BI \-a
+Always print information (model, vendor strings) about the device even
+if it does not support VPD pages.

 .TP
 .BI \-b
 The default behaviour \- treat the device as black listed, and do nothing
 .TP
 .BI \-b
 The default behaviour \- treat the device as black listed, and do nothing


@@ -66,6 +71,8 @@ Instead
 of determining and creating a device node based on a sysfs dev
 entry as done for the \fB\-s\fP, send SG_IO commands to 
 \fBdevice\fP, such as \fB/dev/sdc\fP.
 of determining and creating a device node based on a sysfs dev
 entry as done for the \fB\-s\fP, send SG_IO commands to 
 \fBdevice\fP, such as \fB/dev/sdc\fP.

+This argument should also be used when invoked via udev to avoid problems
+with creation of temporary files on not-yet writable directories.

 .TP
 .BI \-f "\| config\-file"
 Read configuration and black/white list entries from
 .TP
 .BI \-f "\| config\-file"
 Read configuration and black/white list entries from


@@ -84,10 +91,18 @@ to generate any output.
 Prefix the identification string with the  driver model (sysfs) bus id of
 the SCSI device.
 .TP
 Prefix the identification string with the  driver model (sysfs) bus id of
 the SCSI device.
 .TP

-.BI \-p "\| 0x80 | 0x83"
-Use SCSI INQUIRY VPD page code 0x80 or 0x83. The default behaviour is to
-query the available VPD pages, and use page 0x83 if found, else page 0x80
-if found, else nothing.
+.BI \-p "\| 0x80 | 0x83 | pre-spc3-83"
+Use SCSI INQUIRY VPD page code 0x80, 0x83, or pre-spc3-83.
+.sp
+The default
+behaviour is to query the availabe VPD pages, and use page 0x83 if found,
+else page 0x80 if found, else nothing.
+.sp
+Page pre-spc3-83 should only be utilized for those scsi devices which
+are not compliant with the SPC-2 or SPC-3 format for page 83.  While this
+option is used for older model 4, 5, and 6 EMC Symmetrix devices, its
+use with SPC-2 or SPC-3 compliant devices will fallback to the page 83
+format supported by these devices.

 .TP
 .BI \-s "\| sysfs\-device"
 Generate an id for the
 .TP
 .BI \-s "\| sysfs\-device"
 Generate an id for the


@@ -95,6 +110,12 @@ Generate an id for the
 The sysfs mount point must not be included. For example, use /block/sd,
 not /sys/block/sd.
 .TP
 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.
+.TP
+.BI \-x
+Export all data in KEY=<value> format used to import in other programs.
+.TP

 .BI \-v
 Generate verbose debugging output.
 .TP
 .BI \-v
 Generate verbose debugging output.
 .TP


@@ -103,15 +124,15 @@ Display version number and exit.
 .RE
 
 .SH USAGE WITH UDEV 
 .RE
 
 .SH USAGE WITH UDEV 

+

 If \fBscsi_id\fP is invoked with one argument without a leading \-, it
 assumes it is called for a hotplug event, and looks for the sysfs device
 If \fBscsi_id\fP is invoked with one argument without a leading \-, it
 assumes it is called for a hotplug event, and looks for the sysfs device

-in the DEVPATH environment variable. 
+in the DEVPATH environment variable. This mode is deprecated, but
+available for backwards compatibility.

 
 

-This mode is used when run via the \fBudev\fP PROGRAM key. Passing any
-arguments or options as part of the PROGRAM rule breaks this assumption,
-and the results will likely not be as expected.
-
-When in this mode, all errors and warnings are sent via syslog.
+If the DEVPATH environment variable is set, scsi_id assumes it has been
+invoked via udev (or some other hotplug program), and all errors or
+warnings are sent using syslog.

 
 To determine the specific value needed in a RESULT key, use the \-s option,
 for example:
 
 To determine the specific value needed in a RESULT key, use the \-s option,
 for example:


@@ -122,13 +143,18 @@ for example:
 .fi
 .P
 
 .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
 device and any partitions for the device matching the \fBscsi_id\fP output
 of 312345:
 
 .sp
 .nf

-BUS="scsi", PROGRAM="/sbin/scsi_id", RESULT="312345", NAME="disk%n"
+BUS=="scsi", PROGRAM=="/sbin/scsi_id -d %N -s %p", RESULT=="312345", NAME="disk%n"

 .fi
 .P
 
 .fi
 .P
 


@@ -140,7 +166,7 @@ BUS="scsi", PROGRAM="/sbin/scsi_id", RESULT="312345", NAME="disk%n"
 .fi
 .LP
 .SH "SEE ALSO"
 .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
 .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