HP-UX Reference (11i v3 07/02) - 1 User Commands A-M (vol 1)

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cpio(1) cpio(1)

cd olddir

find . -depth -print | cpio -pd

newdir

The trivial case

find . -depth -print | cpio -oB >/dev/rtape/tape4QIC150

can be handled more efﬁciently by:

find . -cpio /dev/rtape/tape4QIC150

WARNINGS

Because of industry standards and interoperability goals,

cpio does not support the archival of ﬁles larger

than 2 GB or ﬁles that have user/group IDs greater than 60 K. Files with user/group IDs greater than 60 K

are archived and restored under the user/group ID of the current process.

Do not redirect the output of

cpio to a named

cpio archive ﬁle residing in the same directory as the ori-

ginal ﬁles belonging to that

cpio

archive. This can cause loss of data.

cpio strips any leading ./ characters in the list of ﬁle names piped to it.

Path names are restricted to PATH_MAX characters (see <limits.h> and limits(5)). If there are too

many unique linked ﬁles, the program runs out of memory to keep track of them. Thereafter, linking infor-

mation is lost. Only users with appropriate privileges can copy special ﬁles.

cpio tapes written on HP machines with the -ox[c] options can sometimes mislead (non-HP) versions of

cpio that do not support the x option. If a non-HP (or non-AT&T) version of

cpio happens to be

modiﬁed so that the (HP)

cpio recognizes it as a device special ﬁle, a spurious device ﬁle might be created.

If /dev/tty is not accessible, cpio issues a complaint and exits.

The -pd option does not create the directory typed on the command line.

The -idr option does not make empty directories.

The -plu option does not link ﬁles to existing ﬁles.

POSIX deﬁnes a ﬁle named TRAILER!!! as an end-of-archive marker. Consequently, if a ﬁle of that

name is contained in a group of ﬁles being written by cpio -o, the ﬁle is interpreted as end-of-archive,

and no remaining ﬁles are copied. The recommended practice is to avoid naming ﬁles anything that resem-

bles an end-of-archive ﬁle name.

To create a POSIX-conforming

cpio archive, the c option must be used. To read a POSIX-conforming

cpio archive, the c option must be used and the b, s, S, and

6 options should not be used. If the user

does not have appropriate privileges, the

U option must also be used to get POSIX-conforming behavior

when reading an archive. Users with appropriate privileges should not use this option to get POSIX-

conforming behavior.

DEPENDENCIES

If the path given to cpio contains a symbolic link as the last element, this link is traversed and path name

resolution continues. cpio uses the symbolic link’s target, rather than that of the link.