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-'\" t
-.\" Copyright (c) 2004 Gunnar Ritter
-.\"
-.\" This software is provided 'as-is', without any express or implied
-.\" warranty. In no event will the authors be held liable for any damages
-.\" arising from the use of this software.
-.\"
-.\" Permission is granted to anyone to use this software for any purpose,
-.\" including commercial applications, and to alter it and redistribute
-.\" it freely, subject to the following restrictions:
-.\"
-.\" 1. The origin of this software must not be misrepresented; you must not
-.\" claim that you wrote the original software. If you use this software
-.\" in a product, an acknowledgment in the product documentation would be
-.\" appreciated but is not required.
-.\"
-.\" 2. Altered source versions must be plainly marked as such, and must not be
-.\" misrepresented as being the original software.
-.\"
-.\" 3. This notice may not be removed or altered from any source distribution.
-.\" Sccsid @(#)pax.1 1.38 (gritter) 8/13/09
-.TH PAX 1 "8/13/09" "Heirloom Toolchest" "User Commands"
-.SH NAME
-pax \- portable archive interchange
-.SH SYNOPSIS
-.PD 0
-.HP
-.nh
-.ad l
-\fBpax\fR [\fB\-cdnvK\fR] [\fB\-b\ \fIsize\fR]
-[\fB\-f\ \fIfile\fR] [\fB\-s\ \fIreplstr\fR]
-[\fB\-x\ \fIhdr\fR] [\fIpatterns\fR]
-.HP
-.ad l
-\fBpax\fR \fB\-r\fR[\fBcdiknuvK\fR] [\fB\-b\ \fIsize\fR]
-[\fB\-f\ \fIfile\fR]
-[\fB\-o\ \fIoptions\fR]
-[\fB\-p\ \fIpriv\fR] [\fB\-s\ \fIreplstr\fR]
-[\fB\-x\ \fIhdr\fR] [\fIpatterns\fR]
-.HP
-.ad l
-\fBpax\fR \fB\-w\fR[\fBadiHtuvLX\fR] [\fB\-b\ \fIsize\fR]
-[\fB\-f\ \fIfile\fR]
-[\fB\-o\ \fIoptions\fR]
-[\fB\-s\ \fIreplstr\fR]
-[\fB\-x\ \fIhdr\fR] [\fIfiles\fR]
-.HP
-.ad l
-\fBpax\fR \fB\-rw\fR[\fBdiHklntuvLX\fR]
-[\fB\-p\ \fIpriv\fR] [\fB\-s\ \fIreplstr\fR]
-[\fIfiles\fR] \fIdirectory\fR
-.br
-.ad b
-.hy 1
-.PD
-.SH DESCRIPTION
-.I Pax
-creates and extracts file archives and copies files.
-.PP
-If neither the
-.I \-r
-or
-.I \-w
-options are given,
-.I pax
-works in
-.I list
-mode
-and prints the contents of the archive.
-.PP
-With the
-.B \-r
-option,
-.I pax
-works in
-.RI ` read '
-mode and extracts files from a file archive.
-By default,
-the archive is read from standard input.
-Optional arguments are interpreted as
-.I patterns
-and restrict the set of extracted files
-to those matching any of the
-.IR patterns .
-The syntax is identical to that described in
-.IR glob (7),
-except that the slash character
-.RB ` / '
-is matched by
-meta-character constructs with
-.RB ` * ',
-.RB ` ? '
-and
-.RB ` [ '.
-Care must be taken to quote meta-characters appropriately from the shell.
-If a pattern matches the prefix name of a directory in the archive,
-all files below that directory are also extracted.
-File permissions are set to those in the archive;
-if the caller is the super-user,
-ownerships are restored as well.
-options are specified.
-Archives compressed with
-.IR bzip2 (1),
-.IR compress (1),
-.IR gzip (1),
-or
-.IR rpm (1)
-are transparently de\%compressed on input.
-.PP
-With
-.BR \-w ,
-.I pax
-works in
-.RI ` write '
-mode,
-creates archives
-and writes them to standard output per default.
-A list of filenames to be included in the archive is
-read from standard input;
-if the name of a directory appears,
-all its members and the directory itself are recursively
-included in the archive.
-The
-.IR find (1)
-utility is useful to generate a list of files
-(see also its
-.I \-cpio
-and
-.I \-ncpio
-operators).
-When producing a filename list for
-.IR pax ,
-find should always be invoked with
-.I \-depth
-since this makes it possible to extract write-protected directories
-for users other than the super-user.
-If
-.I files
-are given on the command line,
-they are included in the archive
-in the same manner as described above
-and standard input is not read.
-.PP
-The
-.B \-rw
-options selects
-.RI ` copy '
-mode;
-a list of
-.I files
-is read from standard input
-or taken from the command line
-as described for
-.IR \-w ;
-files are copied to the specified
-.IR directory ,
-preserving attributes as described for
-.IR \-r .
-Special files are re-created in the target hierarchy,
-and hard links between copied files are preserved.
-.PP
-When a premature end-of-file is detected with
-.I \-r
-and
-.I \-w
-and the archive is a block or character special file,
-the user is prompted for new media.
-.PP
-The following options alter the behavior of
-.IR pax :
-.TP
-.B \-a
-Append files to the archive.
-The archive must be seekable,
-such as a regular file or a block device,
-or a tape device capable of writing between filemarks.
-.TP
-\fB\-b\fI size\fR[\fBw\fR|\fBb\fR|\fBk\fR|\fBm\fR]
-Blocks input and output archives at
-.I size
-byte records.
-The optional suffix multiplies
-.I size
-by 2 for
-.BR w ,
-512 for
-.BR b ,
-1024 for
-.BR k ,
-and 1048576 for
-.BR m .
-.TP
-.B \-c
-Reverses the sense of patterns
-such that a file that does not match any of the patterns
-is selected.
-.TP
-.B \-d
-Causes
-.I pax
-to ignore files below directories.
-In read mode,
-patterns matching directories
-cause only the directory itself to extracted,
-files below will be ignored
-unless another pattern applies to them.
-In write mode,
-arguments or standard input lines referring to directories
-do not cause files below the respective directory
-to be archived.
-.TP
-\fB\-f\fI\ file\fR
-Selects a
-.I file
-that is read with the
-.I \-r
-option instead of standard input
-or written with the
-.I \-w
-option instead of standard output.
-.TP
-.B \-H
-Follow symbolic links given on the command line when reading files with
-.I \-w
-or
-.IR \-rw ,
-but do not follow symbolic links encountered during directory traversal.
-.TP
-.B \-i
-Rename files interactively.
-Before a file is extracted from the archive,
-its file name is printed on standard error
-and the user is prompted to specify a substitute file name.
-If the line read from the terminal is empty,
-the file is skipped;
-if the line consists of a single dot,
-the name is retained;
-otherwise,
-the line forms the new file name.
-.TP
-.B \-k
-Causes existing files not to be overwritten.
-.TP
-.B \-K
-Try to continue operation on read errors and invalid headers.
-If an archive contains another archive,
-files from either archive may be chosen.
-.TP
-.B \-l
-Link files instead of copying them with
-.I \-rw
-if possible.
-.TP
-.B \-L
-Follow symbolic links when reading files with
-.I \-w
-or
-.IR \-rw .
-.B /usr/posix2001/bin/pax
-terminates immediately when it
-detects a symbolic link loop with this option.
-.TP
-.B \-n
-If any
-.I pattern
-arguments are present,
-each pattern can match exactly one archive member;
-further members that could match the particular pattern are ignored.
-Without
-.I pattern
-arguments,
-only the first occurence of
-a file that occurs more than once in the archive
-is selected, the following are ignored.
-.TP
-\fB\-o\ \fIoption\fB,\fR[\fIoption\fB,\fR\|...]
-Specifies options as described for \fI\-x pax\fR.
-.TP
-\fB\-p\ \fIstring\fR
-Specifies which file modes are to be preserved or ignored.
-.I string
-may contain one or more of
-.RS
-.TP
-.B a
-Inhibits preservation of file access times.
-.TP
-.B e
-Causes preservation of every possible mode, ownership and time.
-.TP
-.B m
-Inhibits preservation of file modification times.
-.TP
-.B o
-Causes preservation of owner and group IDs.
-.TP
-.B p
-Causes preservation of file mode bits
-regardless of the umask
-(see
-.IR umask (2)).
-.RE
-.IP
-If file ownership is preserved,
-.I pax
-tries to set the group ownerships to those specified in the archive
-or the original hierarchy, respectively,
-regardless of the privilegues of the invoking user.
-.BR /usr/5bin/pax ,
-.BR /usr/5bin/s42/pax ,
-and
-.B /usr/5bin/posix/pax
-try to set the user ownerships only if invoked by the super-user;
-if invoked by regular users,
-.B /usr/5bin/posix2001/pax
-will produce an error for any file that is not owned by the invoking user.
-.TP
-\fB\-s\ /\fIregular expression\fB/\fIreplacement\fB/\fR[\fBgp\fR]
-Modifies file names in a manner similar to that described in
-.IR ed (1).
-The
-.I p
-flag causes each modified file name to printed.
-Any character can be used as delimiter instead of
-.RI ` / '.
-If a file name is empty after the replacement is done,
-the file is ignored.
-This option can be specified multiple times
-to execute multiple substitutions in the order specified.
-.TP
-.B \-t
-Resets the access times of files
-that were included in the archive with
-.IR \-r .
-.TP
-.B \-u
-In read mode,
-.I pax
-will not overwrite existing target files
-that were modified more recently than the file in the archive
-when this option is given.
-In write mode,
-.I pax
-will read the archive first.
-It will then only append those files to the archive
-that are not already included
-or were more recently modified.
-.TP
-.B \-v
-Prints the file names of archived or extracted files with
-.I \-r
-and
-.I \-w
-and a verbose output format
-if neither of them is given.
-.TP
-\fB\-x\fI header\fR
-Specifies the archive header format to be one of:
-.sp
-.in +6
-.TS
-lfB l.
-\fBnewc\fR SVR4 ASCII cpio format;\
-\fBcrc\fR SVR4 ASCII cpio format with checksum;\
-\fBsco\fR T{
-SCO UnixWare 7.1 ASCII cpio format;
-T}
-\fBscocrc\fR T{
-SCO UnixWare 7.1 ASCII cpio format with checksum;
-T}
-\fBodc\fR T{
-traditional ASCII cpio format, as standardized in IEEE Std. 1003.1, 1996;
-T}
-\fBcpio\fR T{
-same as \fIodc\fR;
-T}
-\fBbin\fR binary cpio format;
-\fBbbs\fR byte-swapped binary cpio format;
-\fBsgi\fR T{
-SGI IRIX extended binary cpio format;
-T}
-\fBcray\fR T{
-Cray UNICOS 9 cpio format;
-T}
-\fBcray5\fR T{
-Cray UNICOS 5 cpio format;
-T}
-\fBdec\fR T{
-Digital UNIX extended cpio format;
-T}
-\fBtar\fR tar format;
-\fBotar\fR old tar format;
-\fBustar\fR T{
-IEEE Std. 1003.1, 1996 tar format;
-T}
-.T&
-l s.
-\fBpax\fR[\fB:\fIoption\fB,\fR[\fIoption\fB,\fR\|...]]
-.T&
-l l.
-\& T{
-IEEE Std. 1003.1, 2001 pax format.
-Format-specific \fIoptions\fR are:
-.in +2n
-.ti 0
-.br
-\fBlinkdata\fR
-.br
-For a regular file which has multiple hard links,
-the file data is stored once for each link in the archive,
-instead of being stored for the first entry only.
-This option must be used with care
-since many implementations are unable
-to read the resulting archive.
-.ti 0
-.br
-\fBtimes\fR
-.br
-Causes the times of last access and last modification
-of each archived file
-to be stored in an extended \fIpax\fR header.
-This in particular allows the time of last access
-to be restored when the archive is read.
-.br
-.in -2n
-T}
-\fBsun\fR T{
-Sun Solaris 7 extended tar format;
-T}
-\fBbar\fR T{
-SunOS 4 bar format;
-T}
-\fBgnu\fR T{
-GNU tar format;
-T}
-\fBzip\fR[\fB:\fIcc\fR] T{
-zip format with optional compression method.
-If \fIcc\fR is one of
-\fBen\fR (normal, default),
-\fBex\fR (extra),
-\fBef\fR (fast),
-or
-\fBes\fR (super fast),
-the standard \fIdeflate\fR compression is used.
-\fBe0\fR selects no compression,
-and
-\fBbz2\fR selects \fIbzip2\fR compression.
-T}
-.TE
-.in -6
-.sp
-This option is ignored with
-.I \-r
-unless the
-.I \-K
-option is also present.
-The default for
-.I \-w
-is traditional ASCII cpio
-.I (odc)
-format.
-.PP
-.ne 38
-Characteristics of archive formats are as follows:
-.sp
-.TS
-allbox;
-l r r r l
-l1fB r2 n2 r2 c.
- T{
-.ad l
-maximum user/\%group id
-T} T{
-.ad l
-maximum file size
-T} T{
-.ad l
-maximum pathname length
-T} T{
-.ad l
-bits in dev_t (major/minor)
-T}
-\-x\ bin 65535 2 GB\ 256 \ 16
-\-x\ sgi 65535 9 EB\ 256 \ 14/18
-T{
-\-x\ odc
-T} 262143 8 GB\ 256 \ 18
-\-x\ dec 262143 8 GB\ 256 \ 24/24
-T{
-\-x\ newc,
-\-x\ crc
-T} 4.3e9 4 GB\ 1024 \ 32/32
-T{
-\-x\ sco, \-x\ scocrc
-T} 4.3e9 9 EB\ 1024 \ 32/32
-T{
-\-x\ cray, \-x\ cray5
-T} 1.8e19 9 EB\ 65535 \ 64
-\-x\ otar 2097151 8 GB\ 99 \ n/a
-T{
-\-x\ tar,
-\-x\ ustar
-T} 2097151 8 GB\ 256 (99) \ 21/21
-\-x\ pax 1.8e19 9 EB\ 65535 \ 21/21
-\-x\ sun 1.8e19 9 EB\ 65535 \ 63/63
-\-x\ gnu 1.8e19 9 EB\ 65535 \ 63/63
-\-x\ bar 2097151 8 GB\ 427 \ 21
-\-x\ zip 4.3e9 9 EB\ 60000 \ 32
-.TE
-.sp
-.PP
-The byte order of
-.B binary
-cpio archives
-depends on the machine
-on which the archive is created.
-Unlike some other implementations,
-.I pax
-fully supports
-archives of either byte order.
-.I \-x\ bbs
-can be used to create an archive
-with the byte order opposed to that of the current machine.
-.PP
-The
-.B sgi
-format extends the binary format
-to handle larger files and more device bits.
-If an archive does not contain any entries
-that actually need the extensions,
-it is identical to a binary archive.
-.I \-x\ sgi
-archives are always created in MSB order.
-.PP
-The
-.B odc
-format was introduced with System\ III
-and standardized with IEEE Std. 1003.1.
-All known
-.I cpio
-and
-.I pax
-implementations since around 1980 can read this format.
-.PP
-The
-.B dec
-format extends the
-.I odc
-format
-to support more device bits.
-Archives in this format are generally incompatible with
-.I odc
-archives
-and need special implementation support to be read.
-.PP
-The
-.B \-x\ newc
-format was introduced with System\ V Release\ 4.
-Except for the file size,
-it imposes no practical limitations
-on files archived.
-The original SVR4 implementation
-stores the contents of hard linked files
-only once and with the last archived link.
-This
-.I pax
-ensures compatibility with SVR4.
-With archives created by implementations that employ other methods
-for storing hard linked files,
-each file is extracted as a single link,
-and some of these files may be empty.
-Implementations that expect methods other than the original SVR4 one
-may extract no data for hard linked files at all.
-.PP
-The
-.B crc
-format is essentially the same as the
-.I \-x\ newc
-format
-but adds a simple checksum (not a CRC, despite its name)
-for the data of regular files.
-The checksum requires the implementation to read each file twice,
-which can considerably increase running time and system overhead.
-As not all implementations claiming to support this format
-handle the checksum correctly,
-it is of limited use.
-.PP
-The
-.B sco
-and
-.B scocrc
-formats are variants of the
-.I \-x\ newc
-and
-.I \-x\ crc
-formats, respectively,
-with extensions to support larger files.
-The extensions result in a different archive format
-only if files larger than slightly below 2\ GB occur.
-.PP
-The
-.B cray
-format extends all header fields to 64 bits.
-It thus imposes no practical limitations of any kind
-on archived files,
-but requires special implementation support
-to be read.
-Although it is originally a binary format,
-the byte order is always MSB as on Cray machines.
-The
-.B cray5
-format is an older variant
-that was used with UNICOS 5 and earlier.
-.PP
-The
-.B otar
-format was introduced with the Unix 7th Edition
-.I tar
-utility.
-Archives in this format
-can be read on all Unix systems since about 1980.
-It can only hold regular files
-(and, on more recent systems, symbolic links).
-For file names that contain characters with the most significant bit set
-(non-ASCII characters),
-implementations differ in the interpretation of the header checksum.
-.PP
-The
-.B ustar
-format was introduced with IEEE Std. 1003.1.
-It extends the old
-.I tar
-format
-with support for directories, device files,
-and longer file names.
-Pathnames of single-linked files can consist of up to 256 characters,
-dependent on the position of slashes.
-Files with multiple links can only be archived
-if the first link encountered is no longer than 100 characters.
-Due to implementation errors,
-file names longer than 99 characters
-can not considered to be generally portable.
-Another addition of the
-.I ustar
-format
-are fields for the symbolic user and group IDs.
-These fields are created by
-.IR pax ,
-but ignored when reading such archives.
-.PP
-With
-.BR "\-x tar" ,
-a variant of the
-.I ustar
-format is selected
-which stores file type bits in the mode field
-to work around common implementation problems.
-These bits are ignored by
-.I pax
-when reading archives.
-.PP
-The
-.B pax
-format is an extension to the
-.I ustar
-format.
-If attributes cannot be archived with
-.IR ustar ,
-an extended header is written.
-Unless the size of an entry is greater than 8\ GB,
-a
-.I pax
-archive should be readable by any implementation
-capable of reading
-.I ustar
-archives,
-although files may be extracted under wrong names
-and extended headers may be extracted as separate files.
-If a file name contains non-UTF-8 characters,
-it may not be archived or extracted correctly
-because of a problem of the
-.I pax
-format specification.
-.PP
-The
-.B sun
-format extends the
-.I ustar
-format similar as the
-.I pax
-format does.
-The extended headers in
-.I sun
-format archives are not understood
-by implementations that support only the
-.I pax
-format and vice-versa.
-The
-.I sun
-format has also problems with non-UTF-8 characters in file names.
-.PP
-The
-.B GNU
-.I tar
-format is mostly compatible with the other
-.I tar
-formats,
-unless an archive entry actually uses its extended features.
-There are no practical limitations on files archived with this format.
-The implementation of
-.I pax
-is limited to expanded numerical fields
-and long file names;
-in particular,
-there is no support for sparse files or incremental backups.
-If
-.I pax
-creates a multi-volume
-.I GNU
-archive,
-it just splits a single-volume archive in multiple parts,
-as with the other formats;
-.I GNU
-multi-volume archives are not supported.
-.PP
-The
-.B bar
-format is similar to the
-.I tar
-format, but can store longer file names.
-It requires special implementation support to be read.
-.PP
-The
-.B zip
-format can be read in many non-Unix environments.
-There are several restrictions on archives
-intended for data exchange:
-only regular files should be stored;
-file times, permissions and ownerships
-might be ignored by other implementations;
-there should be no more than 65536 files in the archive;
-the total archive size should not exceed 2 GB;
-only
-.I deflate
-compression should be used.
-Otherwise,
-.I pax
-stores all information available with other archive formats
-in extended
-.I zip
-file headers,
-so if archive portability is of no concern,
-the
-.I zip
-implementation in
-.I pax
-can archive complete Unix file hierarchies.
-.I Pax
-supports the
-.I zip64
-format extension for large files;
-it automatically writes
-.I zip64
-entries if necessary.
-.I Pax
-can extract all known
-.I zip
-format compression codes.
-It does not support
-.I zip
-encryption.
-Multi-volume
-.I zip
-archives are created as splitted single-volume archives,
-as with the other formats written by
-.IR pax ;
-generic multi-volume
-.I zip
-archives are not supported.
-.SH EXAMPLES
-Extract all files named
-.I Makefile
-or
-.I makefile
-from the archive stored on
-.IR /dev/rmt/c0s0 ,
-overwriting recent files:
-.RS 2
-.sp
-pax \-r \-f /dev/rmt/c0s0 \'[Mm]akefile\' \'*/[Mm]akefile\'
-.RE
-.PP
-List the files contained in a software distribution archive:
-.RS 2
-.sp
-pax \-v \-f distribution.tar.gz
-.RE
-.PP
-Write a
-.IR gzip (1)
-compressed
-.I ustar
-archive containing all files below the directory
-.I \%project
-to the file
-.IR \%project.tar.gz ,
-excluding all directories named
-.I CVS
-or
-.I SCCS
-and their contents:
-.RS 2
-.sp
-find project \-depth \-print | egrep \-v \'/(CVS|SCCS)(/|$)\' |
-.br
- pax \-wd \-x ustar | gzip \-c > project.tar.gz
-.RE
-.PP
-Copy the directory
-.I work
-and its contents
-to the directory
-.IR \%savedfiles ,
-preserving all file attributes:
-.RS 2
-.sp
-pax \-rw \-pe work savedfiles
-.RE
-.PP
-Self-extracting zip archives are not automatically recognized,
-but can normally be read using the
-.I \-K
-option, as with
-.RS 2
-.sp
-pax \-rK \-x zip \-f archive.exe
-.sp
-.RE
-.SH "ENVIRONMENT VARIABLES"
-.TP
-.BR LANG ", " LC_ALL
-See
-.IR locale (7).
-.TP
-.B LC_CTYPE
-Selects the mapping of bytes to characters
-used for matching patterns
-and regular expressions.
-.TP
-.B LC_TIME
-Sets the month names printed in list mode.
-.SH "SEE ALSO"
-cpio(1),
-find(1),
-tar(1)
-.SH DIAGNOSTICS
-.I Pax
-exits with
-.sp
-.TS
-l8fB l.
-0 after successful operation;
-1 on usage errors;
-2 when operation was continued after minor errors;
-3 on fatal error conditions.
-.TE
-.SH NOTES
-Device and inode numbers
-are used for hard link recognition
-with the various cpio formats.
-Since the header space cannot hold
-large numbers present in current file systems,
-devices and inode numbers are set on a per-archive basis.
-This enables hard link recognition with all cpio formats,
-but the link connection to files appended with
-.I \-a
-is not preserved.
-.PP
-If a numeric user or group id does not fit
-within the size of the header field in the selected format,
-files are stored with the user id (or group id, respectively)
-set to 60001.
-.PP
-Use of the
-.I \-a
-option with a
-.I zip
-format archive may cause data loss
-if the archive was not previously created by
-.I cpio
-or
-.I pax
-itself.
-.PP
-If the file names passed to
-.I "pax -w"
-begin with a slash character,
-absolute path names are stored in the archive
-and will be extracted to these path names later
-regardless of the current working directory.
-This is normally not advisable,
-and relative path names should be passed to
-.I pax
-only.
-The
-.I \-s
-option can be used to substitute relative for absolute path names
-and vice-versa.
-.PP
-.I Pax
-does not currently accept the
-\fB\-o delete\fR,
-\fB\-o exthdr.name\fR,
-\fB\-o globexthdr.name\fR,
-\fB\-o invalid\fR,
-\fB\-o listopt\fR,
-and
-\fB\-o keyword\fR
-options from POSIX.1-2001.