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Full Discussion: named pipes
Top Forums Shell Programming and Scripting named pipes Post 10808 by Jimbo on Wednesday 21st of November 2001 11:07:50 AM
Old 11-21-2001
This may not help you any, but at least it might get some discussion going. Following code exports two schemas, each directly to a compressed disk file. These could then be sent to tape with fbackup.

mknod mypipe p

compress < mypipe > ap.dmp.Z &
exp ap/ap file=mypipe 2> ap.log

compress < mypipe > gl.dmp.Z &
exp gl/gl file=mypipe 2> gl.log

So, are you wanting somehow to send several compressed exported schemas directly to tape, rather than first to disk as above?
Jimbo
 

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GZEXE(1)						    BSD General Commands Manual 						  GZEXE(1)

NAME
gzexe -- create auto-decompressing executables SYNOPSIS
gzexe [-d] file ... DESCRIPTION
The gzexe utility uses gzip(1) to compress executables, producing executables that decompress on-the-fly when executed. This saves disk space, at the cost of slower execution times. The original executables are saved by copying each of them to a file with the same name with a '~' suffix appended. After verifying that the compressed executables work as expected, the backup files can be removed. The options are as follows: -d Decompress executables previously compressed by gzexe. The gzexe program refuses to compress non-regular or non-executable files, files with a setuid or setgid bit set, files that are already com- pressed using gzexe or programs it needs to perform on-the-fly decompression: sh(1), mktemp(1), rm(1), echo(1), tail(1), gzip(1), and chmod(1). SEE ALSO
gzip(1) CAVEATS
The gzexe utility replaces files by overwriting them with the generated compressed executable. To be able to do this, it is required that the original files are writable. BSD
January 26, 2007 BSD
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