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- CPIO(1) UNIX Programmer's Manual CPIO(1)
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- NAME
- cpio - copy file archives in and out
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- SYNOPSIS
- cpio -o[Bacv]
- cpio -i[Bcdfmrtuv] [pattern...]
- cpio -p[adlmruv] directory
-
- DESCRIPTION
- The cpio utility produces and reads files in the format
- specified by the cpio Archive/Interchange File Format speci-
- fied in IEEE Std. 1003.1-1988.
-
- The cpio -i (copy in) utility extracts files from the stan-
- dard input, which is assumed to be the product of a previous
- cpio -o . Only files with names that match patterns are
- selected. Multiple patterns may be specified and if no pat-
- terns are specified, the default for patterns is selecting
- all files. The extracted files are conditionally created
- and copied into the current directory, and possibly any lev-
- els below, based upon the options described below and the
- permissions of the files will be those of the previous cpio
- -o . The owner and group of the files will be that of the
- current user unless the user has appropriate privileges,
- which causes cpio to retains the owner and group of the
- files of the previous cpio -o .
-
- The cpio -p (pass) utility reads the standard input to
- obtain a list of path names of files that are conditionally
- created and copied into the destination directory based upon
- the options described below.
-
- If an error is detected, the cause is reported and the cpio
- utility will continue to copy other files. cpio will skip
- over any unrecognized files which it encounters in the
- archive.
-
- The following restrictions apply to the cpio utility:
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- 1 Pathnames are restricted to 256 characters.
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- 2 Appropriate privileges are required to copy special files.
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- 3 Blocks are reported in 512-byte quantities.
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- Options
- The following options are available:
-
- -B Input/output is to be blocked 5120 bytes to the record.
- Can only be used with cpio -o or cpio -i for data that
- is directed to or from character special files.
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- Printed 2/26/90 1
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- CPIO(1) UNIX Programmer's Manual CPIO(1)
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- -a Reset access times of input files after they have been
- copied. When the -l option is also specified, the
- linked files do not have their access times reset. Can
- only be used with cpio -o or cpio -i .
-
- -c Write header information in ASCII character for for
- portability. Can only be used with cpio -i or cpio -o
- . Note that this option should always be used to write
- portable files.
-
- -d Creates directories as needed. Can only be used with
- cpio -i or cpio -p .
-
- -f Copy in all files except those in patterns . Can only
- be used with cpio -i .
-
- -l Whenever possible, link files rather than copying them.
- Can only be used with cpio -p .
-
- -m Retain previous modification times. This option is
- ineffective on directories that are being copied. Can
- only be used with cpio -i or cpio -p .
-
- -r Interactively rename files. The user is asked whether
- to rename pattern each invocation. Read and write per-
- missions for /dev/tty are required for this option. If
- the user types a null line, the file is skipped.
- Should only be used with cpio -i or cpio -o .
-
- -t Print a table of contents of the input. No files are
- created. Can only be used with cpio -i .
-
- -u Copy files unconditionally; usually an older file will
- not replace a new file with the same name. Can only be
- used with cpio -i or cpio -p .
-
- -v Verbose: cause the names of the affected files to be
- printed. Can only be used with cpio -i . Provides a
- detailed listing when used with the -t option.
-
- Operands
- The following operands are available:
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- patterns Simple regular expressions given in the name-
- generating notation of the shell.
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- directory The destination directory.
-
- Exit Status
- The cpio utility exits with one of the following values:
-
- 0 All input files were copied.
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- Printed 2/26/90 2
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- CPIO(1) UNIX Programmer's Manual CPIO(1)
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- 2 The utility encountered errors in copying or accessing
- files or directories. An error will be reported for
- nonexistent files or directories, or permissions that
- do not allow the user to access the source or target
- files.
-
-
- It is important to use the -depth option of the find utility
- to generate pathnames for cpio . This eliminates problems
- cpio could have trying to create files under read-only
- directories.
-
- The following command:
- ls | cpio -o > ../newfile
- copies out the files listed by the ls utility and redirects
- them to the file newfile .
-
- The following command:
- cat newfile | cpio -id "memo/al" "memo/b*"
- uses the output file newfile from the cpio -o utility, takes
- those files that match the patterns memo/al and memo/b* ,
- creates the directories below the current directory, and
- places the files in the appropriate directories.
-
- The command
- find . -depth -print | cpio -pdlmv newdir
- takes the file names piped to it from the find utility and
- copies or links those files to another directory named
- newdir , while retaining the modification time.
-
- FILES
- /dev/tty used to prompt the user for information when the
- -i or -r options are specified.
-
- SEE ALSO
- find(1), pax(1), tar(1), cpio(5), tar(5)
-
- COPYRIGHT
- Copyright (c) 1989 Mark H. Colburn.
- All rights reserved.
-
- Redistribution and use in source and binary forms are per-
- mitted provided that the above copyright notice is dupli-
- cated in all such forms and that any documentation,
- advertising materials, and other materials related to such
- distribution and use acknowledge that the software was
- developed by Mark H. Colburn.
-
- THE SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS
- OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PAR-
- TICULAR PURPOSE.
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- CPIO(1) UNIX Programmer's Manual CPIO(1)
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- AUTHOR
- Mark H. Colburn
- Minnetech Consulting, Inc.
- 3232 Aquila Lane
- St. Louis Park, MN 55426
-
- mark@Minnetech.MN.ORG
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