path: root/README
diff options
authorSergey Poznyakoff <gray@gnu.org.ua>2003-11-21 14:58:17 +0000
committerSergey Poznyakoff <gray@gnu.org.ua>2003-11-21 14:58:17 +0000
commitc855f03150358ae41b3493e3e2f0844fadf74b51 (patch)
treefcc4fe0a928a0cd1a9dd3a55c9859b4854da75ff /README
parentcabcd48afa08e892f8628c98a5558af136b21ade (diff)
Added to the repository
Diffstat (limited to 'README')
1 files changed, 71 insertions, 0 deletions
diff --git a/README b/README
new file mode 100644
index 0000000..fafff13
--- /dev/null
+++ b/README
@@ -0,0 +1,71 @@
+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.
+This package also includes rmt, the remote tape server, and mt, a tape
+drive control program; these two programs will only be compiled if
+your system supports remote command execution, and tape drive control
+operations, respectively.
+See the file INSTALL for compilation and installation instructions for Unix.
+For non-Unix systems [ Note: The non-Unix makefiles have not been tested
+ for this release ]
+makefile.pc is a makefile for Turbo C or C++ or Borland C++ on MS-DOS.
+makefile.os2 is a makefile for MS C and GNU C (emx/gcc) on OS/2.
+cpio.def is a linker definition file for the MS C OS/2 version.
+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-cpio@gnu.org.

Return to:

Send suggestions and report system problems to the System administrator.