DataMuseum.dk

top - download

    Length: 2243 (0x8c3)
    Types: TextFile
    Names: »fixcpio.1«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─ ⟦this⟧ »EUUGD11/euug-87hel/sec1/fixcpio/fixcpio.1« 

TextFile

.\"	$Header: fixcpio.1,v 1.1 87/01/05 19:51:00 source Exp $
.TH FIXCPIO 1 "UNIX-PC" "Public Domain" "David Brower"
.ta 8n 16n 24n 32n 40n 48n 56n
.SH NAME
fixcpio \- repair damaged cpio -c archives
.SH ORIGIN
David Brower, {gladys, sun, amdahl, mtxinu}!rtech!daveb
.SH SYNOPSIS
.B fixcpio
[ infile [ outfile ] ]
.SH DESCRIPTION
.I Fixcpio
Reads the standard input (or the named \fIinfile\fP) and writes a cpio
-c archive to the standard output (or named \fIoutfile\fP).  
.I Infile
and
.I outfile
may be the dash character (`\-') to signify standard in or out.
.PP
The input is presumed to be a \fIcpio -c\fP archive.  While the input
is copied to the output,
.I 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
.nf

	Skipping bad member ``filename''
	
.fi
for each bad record.  This eliminates the cheerful ``Out of phase--get help''
message from cpio.
.PP
The major use for 
.I 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.

.PP
1.  Get images of the remaining floppies in files that are in alphabetical
order:
.nf

	# 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 $disk \ec:"
		read answer
		dd if=/dev/rfp/021 ibs=1024 count=320 of=disk-$disk
		dismount -f
		disk=`awk "{ printf \e"%02d\en\e", $disk + 1 }" `
	done

.fi
.PP
2.  Restore the contents of the disks with
.I fixcpio's
help.
.nf

	cat disk-* | fixcpio | cpio -icdum

.fi
.SH FILES
.br
/tmp Holds a temp file containing the archive member currently being examined.
.SH BUGS
.I Fixcpio
does not understand binary cpio archives.
.PP
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.
.PP
Using a temp file is a kludge, needed because you can't seek around on
input from a pipe.
.PP
Status messages should probably be toggled with a -v `verbose' flag.