Execute command from awk Post: 302641761

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Top Forums Shell Programming and Scripting Execute command from awk Post 302641761 by neutronscott on Wednesday 16th of May 2012 01:18:34 PM

05-16-2012

Registered User

I created a fake "ioscan" which displays output like yours. the script is entirely awk. it'd probably be done better in shell, but i'm not certain which that is.

Code:

#!/usr/bin/awk -f
BEGIN {
        listcmd = "ioscan -fuNC disk"
        while ((listcmd | getline) > 0) {
                if ($1 != "disk")
                        continue
                wwidcmd="ioscan -P wwid -N -H " $3
                while ((wwidcmd | getline wwidline) > 0) {
                        if (wwidline !~ /^disk/)
                                continue
                        n=split(wwidline, a, /[[:space:]]*/)
                        if (a[3] == $3) print $0,a[4]
                }
                close(wwidcmd)
        }
}

produces output like this:

Code:

[mute@geek ~]$ ./script
disk      3  64000/0xfa00/0x0   esdisk   CLAIMED     DEVICE       HP      DG072A9BB7 0xd9ef341e08df0449ab6e28a6698b8ed1
disk      4  64000/0xfa00/0x1   esdisk   CLAIMED     DEVICE       HP      DG072A8B54 0xa3a7d748a36dfe2838c22cf71e79b25f
disk      5  64000/0xfa00/0x2   esdisk   CLAIMED     DEVICE       HP      DG072A8B54 0xeb955194471d1b877293b54ba7c12807
disk      7  64000/0xfa00/0x3   esdisk   CLAIMED     DEVICE       TEAC    DVD-ROM DW-224EV 0x17ed66ede9042c52d6570e66ea8c4112
disk     19  64000/0xfa00/0x9   esdisk   CLAIMED     DEVICE       EMC     SYMMETRIX 0x0e90354e6c63d4b66a9fe1e8191cd0d5
disk     20  64000/0xfa00/0xa   esdisk   CLAIMED     DEVICE       EMC     SYMMETRIX 0x35c07d3d928df2c0196e46a6296c8768
disk     21  64000/0xfa00/0xb   esdisk   CLAIMED     DEVICE       EMC     SYMMETRIX 0x2b6c01e7a6591d730234fd03c909d943
disk     22  64000/0xfa00/0xc   esdisk   CLAIMED     DEVICE       EMC     SYMMETRIX 0xb403a1eb43fe26e4c5eadfc366554f29
disk     25  64000/0xfa00/0xd   esdisk   CLAIMED     DEVICE       EMC     SYMMETRIX 0x0b4a30a946bdcc35812f341d52577148
disk     34  64000/0xfa00/0x10  esdisk   CLAIMED     DEVICE       DGC     CX500WDR5 0x83c9c360f1dd2b200c26d997bc5d19b6
disk     35  64000/0xfa00/0x11  esdisk   CLAIMED     DEVICE       DGC     CX500WDR5 0xa33398f2469a04d6e6666696c9494569
disk     41  64000/0xfa00/0x12  esdisk   CLAIMED     DEVICE       EMC     SYMMETRIX 0x71db7f9609f641977acc1c3efa74fa19
disk     42  64000/0xfa00/0x13  esdisk   CLAIMED     DEVICE       EMC     SYMMETRIX 0x0813fa24f883561fee832cbafd13ae41
disk     47  64000/0xfa00/0x19  esdisk   CLAIMED     DEVICE       DGC     CX500WDR5 0x31f43321710280c06969f2bf7092f452
disk     48  64000/0xfa00/0x1a  esdisk   CLAIMED     DEVICE       DGC     CX500WDR5 0xf42a447b64f431b99d7fe59f65f71bc7
disk     49  64000/0xfa00/0x1b  esdisk   CLAIMED     DEVICE       DGC     CX500WDR5 0x0e35417912095526b85ff927eeb3051d
disk     50  64000/0xfa00/0x1c  esdisk   CLAIMED     DEVICE       DGC     CX500WDR5 0x9e5630af99c9c6441083ed4b152e8210

---------- Post updated at 01:18 PM ---------- Previous update was at 01:09 PM ----------

Ya know ioscan can probably be made to output all of this but I cannot find a proper manual page for it. I'm guessing here but also hoping -P could take multiple options so that you can have it display all the fields you want instead of just wwid ...

neutronscott

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vxdmp

vxdmp(7)						 Miscellaneous Information Manual						  vxdmp(7)

NAME

       vxdmp - Veritas Volume Manager multipathing disk devices

DESCRIPTION

       Multipathed  disk  devices  in Veritas Volume Manager (VxVM) represent virtual devices with one or more physical access paths to a physical
       disk.  The Multipathing feature provides disk access reliability by dynamically switching to another physical path if there is a path fail-
       ure.

       Every disk that is visible to VxVM is represented by a multipath device node in the /dev/vx/dmp and /dev/vx/rdmp directories for block type
       and character type interfaces.  A simple disk is represented by a multipath device having one physical path, whereas a disk that is part of
       a multiported disk array is represented by a multipath device with many device access paths depending upon the type of the disk array.

       VxVM  uses  standard  disk  device  naming conventions to name multipath devices.  For example, if there is a disk device with two physical
       access paths such as c1t0d0 and c2t0d0, the multipathing device node for this particular disk is created under /dev/vx/dmp and /dev/vx/rdmp
       as c1t0d0 or c2t0d0.

       To  provide  multipathing,  VxVM  maintains an internal database of all the multipathed devices detected by the system and their respective
       paths.  The database is created at system boot time.  When disks are added or removed from the system, VxVM provides support to reconfigure
       the multipath device database to reflect new states of the hardware, while the system is online.

       To reconfigure the DMP database, run ioscan followed by insf, and then invoke vxdctl enable (see vxdctl(1M)).

       The  various  access  paths to a multipathed device can be seen by using a vxdisk command (see vxdisk(1M)).  These commands open the multi-
       pathing configuration device /dev/vx/dmpconfig to obtain the required information about the various paths to a multipathed device and their
       states.

       VxVM also provides the facility to enable or disable a disk controller. This feature can be used to stop all I/Os through a particular con-
       troller to perform maintenance operations on it.  Use the vxdmpadm command to do this and also perform other operations	on  the  multipath
       device database.

       VxVM  can  provide notification about events that occur in the DMP database due to a change in hardware.  See the vxnotify(1M) man page for
       more information.

       VxVM is capable of multipathing both Active/Active and Active/Passive disk arrays.

FILES

       /dev/vx/dmp		     Multipathing block devices.

       /dev/vx/rdmp		     Multipathing character devices.

SEE ALSO

       ioctl(2), vxdctl(1M), vxdisk(1M), vxdmpadm(1M), vxnotify(1M)

VxVM 5.0.31.1							    24 Mar 2008 							  vxdmp(7)

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