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-rw-r--r--rpm2cpio.pl112
1 files changed, 112 insertions, 0 deletions
diff --git a/rpm2cpio.pl b/rpm2cpio.pl
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+#!/usr/bin/perl
+
+# Copyright (C) 1997,1998,1999, Roger Espel Llima
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and any associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# SOFTWARE'S COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE
+
+# (whew, that's done!)
+
+# why does the world need another rpm2cpio? because the existing one
+# won't build unless you have half a ton of things that aren't really
+# required for it, since it uses the same library used to extract RPM's.
+# in particular, it won't build on the HPsUX box i'm on.
+
+# sw 2002-Mar-6 Don't slurp the whole file
+
+# add a path if desired
+$gzip = "gzip";
+
+sub printhelp {
+ print <<HERE;
+rpm2cpio, perl version by orabidoo <odar\@pobox.com> +sw
+dumps the contents to stdout as a cpio archive
+
+use: rpm2cpio [file.rpm] > file.cpio
+
+Here's how to use cpio:
+ list of contents: cpio -t -i < /file/name
+ extract files: cpio -d -i < /file/name
+HERE
+
+ exit 0;
+}
+
+if ($#ARGV == -1) {
+ printhelp if -t STDIN;
+ $f = "STDIN";
+} elsif ($#ARGV == 0) {
+ open(F, "< $ARGV[0]") or die "Can't read file $ARGV[0]\n";
+ $f = 'F';
+} else {
+ printhelp;
+}
+
+printhelp if -t STDOUT;
+
+# gobble the file up
+##undef $/;
+##$|=1;
+##$rpm = <$f>;
+##close ($f);
+
+read $f,$rpm,96;
+
+($magic, $major, $minor, $crap) = unpack("NCC C90", $rpm);
+
+die "Not an RPM\n" if $magic != 0xedabeedb;
+die "Not a version 3 or 4 RPM\n" if $major != 3 && $major != 4;
+
+##$rpm = substr($rpm, 96);
+
+while (!eof($f)) {
+ $pos = tell($f);
+ read $f,$rpm,16;
+ $smagic = unpack("n", $rpm);
+ last if $smagic eq 0x1f8b;
+ # Turns out that every header except the start of the gzip one is
+ # padded to an 8 bytes boundary.
+ if ($pos & 0x7) {
+ $pos += 7;
+ $pos &= ~0x7; # Round to 8 byte boundary
+ seek $f, $pos, 0;
+ read $f,$rpm,16;
+ }
+ ($magic, $crap, $sections, $bytes) = unpack("N4", $rpm);
+ die "Error: header not recognized\n" if $magic != 0x8eade801;
+ $pos += 16; # for header
+ $pos += 16 * $sections;
+ $pos += $bytes;
+ seek $f, $pos, 0;
+}
+
+if (eof($f)) {
+ die "bogus RPM\n";
+}
+
+open(ZCAT, "|gzip -cd") || die "can't pipe to gzip\n";
+print STDERR "CPIO archive found!\n";
+
+print ZCAT $rpm;
+
+while (read($f, ($_=''), 16384) > 0) {
+ print ZCAT;
+}
+
+close ZCAT;
+