Richard Hubbell wrote:
Thanks, Richard. As far as I knew all cdrecord -scanbus output was displaying on my monitor (stdout) and did not know that the first four lines omitted from the disk file I created were "errors" (scsidev: "ATA" --> Linux sg driver version: 3.5.27).Since you don't really give the details I would bet that you're expecting cdrecord to print only on stdout but it probably prints to stderr as well.
Capture stdout and stderr to a file and see if that is what you expect.
cdrecord -scanbus 2>&1 myfile
Richard
On Sun, 23 Jan 2005 22:44:09 -0500, David Curry <dsccable@xxxxxxxxxxx> wrote:
Reference materials on commands and features of BASH that I have consulted include material stating that a line command in the form
$ command [options] [directory (if different than the current directory) ] > [filename]
will re-direct the output of the command from stdout to the named file.
In evaluating the installation of FC2 on my PC (box?), I have noticed a difference between outputs sent to stdout and outputs to > [filenames].
Is this a bug?
To illustrate, cdrecord -scanbus > scanbus.txt on my machine produces the following text file.
listing of scanbus.txt: Cdrecord-Clone 2.01-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling Note: This version is an unofficial (modified) version with DVD support
Note: and therefore may have bugs that are not present in the original. Note: Please send bug reports or support requests to http://bugzilla.redhat.com/bugzilla Note: The author of cdrecord should not be bothered with problems in this version. Using libscg version 'schily-0.8'. scsibus1: 1,0,0 100) 'ATAPI ' 'CD-R/RW 24X10 ' 'P.MJ' Removable CD-ROM 1,1,0 101) 'LITEON ' 'CD-ROM LTN301 ' 'MM07' Removable CD-ROM 1,2,0 102) * 1,3,0 103) * 1,4,0 104) * 1,5,0 105) * 1,6,0 106) * 1,7,0 107) *
Output of cdrecord -scanbus directed to stdout reads
Cdrecord-Clone 2.01-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling Note: This version is an unofficial (modified) version with DVD support Note: and therefore may have bugs that are not present in the original. Note: Please send bug reports or support requests to http://bugzilla.redhat.com/bugzilla Note: The author of cdrecord should not be bothered with problems in this version. scsidev: 'ATA' devname: 'ATA' scsibus: -2 target: -2 lus: -2 Linux sg driver version: 3.5.27 Using libscg version 'schily-0.8'. cdrecord: Warning: using inofficial libscg transport code version (schily - Red Hat-scsi-linux-sg.c-1.83-RH '@(#)scsi-linux-sg.c 1.83 04/05/20 Copyright 1997 J. Schilling'). scsibus1: 1,0,0 100) 'ATAPI ' 'CD-R/RW 24X10 ' 'P.MJ' Removable CD-ROM cdrecord: warning: controller returns wrong size for CD capabilities page. 1,1,0 101) 'LITEON ' 'CD-ROM LTN301 ' 'MM07' Removable CD-ROM 1,2,0 102) * 1,3,0 103) * 1,4,0 104) * 1,5,0 105) * 1,6,0 106) * 1,7,0 107) *
There are six more lines of output sent to the display screen than are sent to a file via use of the > [filename] option in BASH.
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Following Up on the suggestions of Jason Tibbits and Jim Cox, I repeated the exercise using &> instead of just > and the file produced included all of the missing lines.
Thanks again to all who responded.
