fixcpio man page on Xenix

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FIXCPIO(1)			 David Brower			    FIXCPIO(1)

NAME
       fixcpio - repair damaged cpio -c archives

ORIGIN
       David Brower, {gladys, sun, amdahl, mtxinu}!rtech!daveb

SYNOPSIS
       fixcpio [ infile [ outfile ] ]

DESCRIPTION
       Fixcpio	Reads  the  standard  input (or the named infile) and writes a
       cpio -c archive to the standard output (or named outfile).  Infile  and
       outfile may be the dash character (`-') to signify standard in or out.

       The  input  is  presumed	 to  be a cpio -c archive.  While the input is
       copied to the output, fixcpio checks each archive  member  for  sanity,
       and  discards those that appear to be bad. The program writes the names
       of archive members copied on stderr, and says

	       Skipping bad member ``filename''

       for each bad record.  This eliminates the cheerful ``Out of  phase--get
       help'' message from cpio.

       The major use for fixcpio is in recovering multiple floppy backups when
       one disk in the set goes bad.  The process for the UNIX-PC is about  as
       follows.

       1.  Get images of the remaining floppies in files that are in alphabet‐
       ical order:

	       # works with up to 99 disk backup sets.
	       #
	       # if, ibs, and count will depend on your machine and
	       # backup procedure.
	       disk=01
	       while :
	       do
		       echo "Interrupt to quit, return to read disk $disk \c:"
		       read answer
		       dd if=/dev/rfp/021 ibs=1024 count=320 of=disk-$disk
		       dismount -f
		       disk=`awk "{ printf \"%02d\n\", $disk + 1 }" `
	       done

       2.  Restore the contents of the disks with fixcpio's help.

	       cat disk-* | fixcpio | cpio -icdum


FILES
       /tmp Holds a temp file containing the archive  member  currently	 being
       examined.

BUGS
       Fixcpio does not understand binary cpio archives.

       Getting disk images from the floppies depends on both the machine and
	   your backup procedures.  You need to know how the floppies are
	   written before you start recovering, and this might be awkward if
	   you've lost your hard disk.

       Using  a temp file is a kludge, needed because you can't seek around on
       input from a pipe.

       Status messages should probably be toggled with a -v `verbose' flag.

Public Domain			    UNIX-PC			    FIXCPIO(1)
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