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27 .Dd September 16, 2014
32 .Nd copy files to and from archives
51 copies files between archives and directories.
52 This implementation can extract from tar, pax, cpio, zip, jar, ar,
53 and ISO 9660 cdrom images and can create tar, pax, cpio, ar,
58 is a mode indicator from the following list:
59 .Bl -tag -compact -width indent
62 Read an archive from standard input (unless overridden) and extract the
63 contents to disk or (if the
66 list the contents to standard output.
67 If one or more file patterns are specified, only files matching
68 one of the patterns will be extracted.
71 Read a list of filenames from standard input and produce a new archive
72 on standard output (unless overridden) containing the specified items.
75 Read a list of filenames from standard input and copy the files to the
80 Unless specifically stated otherwise, options are applicable in
82 .Bl -tag -width indent
84 Read filenames separated by NUL characters instead of newlines.
85 This is necessary if any of the filenames being read might contain newlines.
88 Append to the specified archive.
89 (Not yet implemented.)
92 Reset access times on files after they are read.
95 Block output to records of 5120 bytes.
98 Block output to records of
103 Use the old POSIX portable character format.
105 .Fl Fl format Ar odc .
106 .It Fl d , Fl Fl make-directories
108 Create directories as necessary.
111 Read list of file name patterns from
114 .It Fl F Ar file , Fl Fl file Ar file
115 Read archive from or write archive to
119 Ignore files that match
121 .It Fl H Ar format , Fl Fl format Ar format
123 Produce the output archive in the specified format.
124 Supported formats include:
126 .Bl -tag -width "iso9660" -compact
131 The SVR4 portable cpio format.
133 The old POSIX.1 portable octet-oriented cpio format.
135 The POSIX.1 pax format, an extension of the ustar format.
137 The POSIX.1 tar format.
140 The default format is
143 .Xr libarchive-formats 5
144 for more complete information about the
145 formats currently supported by the underlying
148 .It Fl h , Fl Fl help
149 Print usage information.
153 .It Fl i , Fl Fl extract
155 See above for description.
158 Disable security checks during extraction or copying.
159 This allows extraction via symbolic links, absolute paths,
160 and path names containing
165 Compress the file with xz-compatible compression before writing it.
166 In input mode, this option is ignored; xz compression is recognized
167 automatically on input.
173 All symbolic links will be followed.
174 Normally, symbolic links are archived and copied as symbolic links.
175 With this option, the target of the link will be archived or copied instead.
176 .It Fl l , Fl Fl link
178 Create links from the target directory to the original files,
182 Compress the resulting archive with
184 In input mode, this option is ignored.
187 Compress the archive with lz4-compatible compression before writing it.
188 In input mode, this option is ignored; lz4 compression is recognized
189 automatically on input.
192 Compress the file with lzma-compatible compression before writing it.
193 In input mode, this option is ignored; lzma compression is recognized
194 automatically on input.
197 Compress the resulting archive with
199 In input mode, this option is ignored.
200 .It Fl Fl passphrase Ar passphrase
203 is used to extract or create an encrypted archive.
204 Currently, zip is only a format that
206 can handle encrypted archives.
207 You shouldn't use this option unless you realize how insecure
208 use of this option is.
209 .It Fl m , Fl Fl preserve-modification-time
211 Set file modification time on created files to match
213 .It Fl n , Fl Fl numeric-uid-gid
216 Display numeric uid and gid.
219 displays the user and group names when they are provided in the
220 archive, or looks up the user and group names in the system
222 .It Fl Fl no-preserve-owner
224 Do not attempt to restore file ownership.
225 This is the default when run by non-root users.
229 .It Fl o , Fl Fl create
231 See above for description.
232 .It Fl p , Fl Fl pass-through
234 See above for description.
235 .It Fl Fl preserve-owner
237 Restore file ownership.
238 This is the default when run by the root user.
240 Suppress unnecessary messages.
241 .It Fl R Oo user Oc Ns Oo : Oc Ns Oo group Oc , Fl Fl owner Oo user Oc Ns Oo : Oc Ns Oo group Oc
242 Set the owner and/or group on files in the output.
243 If group is specified with no user
246 then the group will be set but not the user.
247 If the user is specified with a trailing colon and no group
250 then the group will be set to the user's default group.
251 If the user is specified with no trailing colon, then
252 the user will be set but not the group.
257 modes, this option can only be used by the super-user.
258 (For compatibility, a period can be used in place of the colon.)
261 Rename files interactively.
262 For each file, a prompt is written to
264 containing the name of the file and a line is read from
266 If the line read is blank, the file is skipped.
267 If the line contains a single period, the file is processed normally.
268 Otherwise, the line is taken to be the new name of the file.
269 .It Fl t , Fl Fl list
271 List the contents of the archive to stdout;
272 do not restore the contents to disk.
273 .It Fl u , Fl Fl unconditional
275 Unconditionally overwrite existing files.
276 Ordinarily, an older file will not overwrite a newer file on disk.
278 Print a dot to stderr for each file as it is processed.
281 .It Fl v , Fl Fl verbose
282 Print the name of each file to stderr as it is processed.
285 provide a detailed listing of each file.
287 Print the program version information and exit.
290 Compress the archive with bzip2-compatible compression before writing it.
291 In input mode, this option is ignored;
292 bzip2 compression is recognized automatically on input.
295 Compress the archive with compress-compatible compression before writing it.
296 In input mode, this option is ignored;
297 compression is recognized automatically on input.
300 Compress the archive with gzip-compatible compression before writing it.
301 In input mode, this option is ignored;
302 gzip compression is recognized automatically on input.
307 The following environment variables affect the execution of
309 .Bl -tag -width ".Ev BLOCKSIZE"
314 for more information.
316 The timezone to use when displaying dates.
319 for more information.
324 command is traditionally used to copy file hierarchies in conjunction
328 The first example here simply copies all files from
332 .Dl Nm find Pa src | Nm Fl pmud Pa dest
334 By carefully selecting options to the
336 command and combining it with other standard utilities,
337 it is possible to exercise very fine control over which files are copied.
338 This next example copies files from
342 that are more than 2 days old and whose names match a particular pattern:
343 .Dl Nm find Pa src Fl mtime Ar +2 | Nm grep foo[bar] | Nm Fl pdmu Pa dest
345 This example copies files from
349 that are more than 2 days old and which contain the word
351 .Dl Nm find Pa src Fl mtime Ar +2 | Nm xargs Nm grep -l foobar | Nm Fl pdmu Pa dest
353 The mode options i, o, and p and the options
354 a, B, c, d, f, l, m, r, t, u, and v comply with SUSv2.
356 The old POSIX.1 standard specified that only
361 were interpreted as command-line options.
362 Each took a single argument of a list of modifier
364 For example, the standard syntax allows
374 are only modifiers to
376 they are not command-line options in their own right.
377 The syntax supported by this implementation is backwards-compatible
379 For best compatibility, scripts should limit themselves to the
389 .Xr libarchive-formats 5 ,
392 There is no current POSIX standard for the cpio command; it appeared
398 The cpio, ustar, and pax interchange file formats are defined by
406 utilities were written by Dick Haight
407 while working in AT&T's Unix Support Group.
408 They first appeared in 1977 in PWB/UNIX 1.0, the
409 .Dq Programmer's Work Bench
410 system developed for use within AT&T.
411 They were first released outside of AT&T as part of System III Unix in 1981.
416 even though it was not well-known outside of AT&T until some time later.
418 This is a complete re-implementation based on the
422 The cpio archive format has several basic limitations:
423 It does not store user and group names, only numbers.
424 As a result, it cannot be reliably used to transfer
425 files between systems with dissimilar user and group numbering.
426 Older cpio formats limit the user and group numbers to
427 16 or 18 bits, which is insufficient for modern systems.
428 The cpio archive formats cannot support files over 4 gigabytes,
431 variant, which can support files up to 8 gigabytes.