mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-18 17:00:49 +01:00
8843e04abc
with SYSV cpio. It's also supposed to integrate rmt support, though I haven't tried this.
57 lines
2.2 KiB
Plaintext
57 lines
2.2 KiB
Plaintext
This is GNU cpio, a program to manage archives of files.
|
|
As of version 2.0, it supports the features of the System V release 4
|
|
cpio, including support for tar archives.
|
|
|
|
The main advantages of GNU cpio over Unix versions are:
|
|
|
|
* It can access tape drives on other hosts using TCP/IP.
|
|
|
|
* `-o' and `-p' can copy symbolic links either as symbolic links or,
|
|
with `-L', as the files they point to.
|
|
|
|
* `-i' automatically recognizes the archive format and tries to
|
|
recover from corrupted archives.
|
|
|
|
* The output of '-itv' looks like 'ls -l'.
|
|
|
|
* It accepts long-named options as well as traditional
|
|
single-character options.
|
|
|
|
A few features of other versions of cpio are missing from GNU cpio, including:
|
|
|
|
* The `-6' option to support Sixth Edition Unix cpio archives with `-i'.
|
|
|
|
* An option to limit volume size, like afio -s.
|
|
|
|
|
|
GNU cpio supports the POSIX.1 "ustar" tar format. GNU tar supports a
|
|
somewhat different, early draft of that format. That draft format has
|
|
a slightly different magic number in the tar header and doesn't
|
|
include the path prefix part of the header, which allows storing file
|
|
names that are longer than 100 characters. GNU cpio knows to
|
|
recognize the nonstandard GNU tar "ustar" archives.
|
|
|
|
The following patch to GNU tar 1.11.1 makes GNU tar recognize standard
|
|
"ustar" archives, such as GNU cpio produces, except that it won't use
|
|
the path prefix. Without this patch, GNU tar thinks that standard
|
|
"ustar" archives are old-format tar archives and can not use the extra
|
|
information that "ustar" format contains. If you use this patch,
|
|
remember that you will lose the beginnings of paths that are longer
|
|
than 100 characters. That's why it's not an official part of GNU tar.
|
|
(Adding support for the path prefix to GNU tar is not trivial.)
|
|
|
|
--- list.c.orig Mon Sep 14 17:04:03 1992
|
|
+++ list.c Wed Oct 14 14:02:28 1992
|
|
@@ -439,7 +439,7 @@
|
|
st->st_ctime = from_oct(1+12, header->header.ctime);
|
|
}
|
|
|
|
- if (0==strcmp(header->header.magic, TMAGIC)) {
|
|
+ if (0==strncmp(header->header.magic, TMAGIC, 5)) {
|
|
/* Unix Standard tar archive */
|
|
*stdp = 1;
|
|
if (wantug) {
|
|
|
|
Mail suggestions and bug reports for GNU cpio to
|
|
bug-gnu-utils@prep.ai.mit.edu.
|