106 lines
3.1 KiB
Perl
106 lines
3.1 KiB
Perl
#!/usr/bin/perl
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# Copyright (C) 1997,1998,1999, Roger Espel Llima
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# Copyright (C) 2000, Sergey Babkin
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and any associated documentation files (the "Software"), to
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# deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# SOFTWARE'S COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE
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# (whew, that's done!)
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# why does the world need another rpm2cpio? because the existing one
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# won't build unless you have half a ton of things that aren't really
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# required for it, since it uses the same library used to extract RPM's.
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# in particular, it won't build on the HPsUX box i'm on.
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# add a path if desired
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$gzip = "gzip";
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sub printhelp {
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print "rpm2cpio, perl version by orabidoo <odar\@pobox.com>\n";
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print "use: rpm2cpio [file.rpm]\n";
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print "dumps the contents to stdout as a GNU cpio archive\n";
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exit 0;
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}
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if ($#ARGV == -1) {
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printhelp if -t STDIN;
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$f = "STDIN";
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} elsif ($#ARGV == 0) {
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open(F, "< $ARGV[0]") or die "Can't read file $ARGV[0]\n";
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$f = 'F';
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} else {
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printhelp;
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}
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printhelp if -t STDOUT;
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# gobble the file up
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undef $/;
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$|=1;
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#$rpm = <$f>;
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#close ($f);
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read $f, $rpm, 96 ;
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($magic, $major, $minor) = unpack("NCC", $rpm);
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die "Not an RPM\n" if $magic != 0xedabeedb;
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die "Not a version 3 or 4 RPM\n" if $major != 3 && $major != 4;
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$filter="";
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read $f, $rpm, 16 or die "No header\n" ;
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while(1) {
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($magic, $crap, $sections, $bytes) = unpack("N4", $rpm);
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$smagic = unpack("n", $rpm);
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$format="unknown";
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if ($smagic eq 0x1f8b) {
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$filter="gzip -cd";
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last;
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}
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if (substr($rpm, 0, 3) eq "BZh") {
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$filter="bzip2 -cd";
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last;
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}
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#printf(STDERR "0x%x 0x%x 0x%x 0x%x\n", $magic, $sections, $bytes, $smagic);
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die "Error: header not recognized\n" if $magic != 0x8eade801;
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seek $f, 16*$sections+$bytes, 1 or die "FIle is too small\n"; # skip the headers
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do {
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read $f, $rpm, 1 or die "No header\n" ;
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$c = unpack("C", $rpm);
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} while($c==0);
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read $f, $rpm, 15, 1 or die "No header\n" ;
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}
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#read $f, $rpm, 20 or die "No gzip header\n"; # the gzip header
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#$smagic = unpack("n", $rpm);
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#printf(STDERR "0x%x\n", $smagic);
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die "Error: bogus RPM\n" if $filter eq "";
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open(ZCAT, "| $filter") || die "can't pipe to $filter\n";
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#print STDERR "CPIO archive found!\n";
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while($rpm ne '') {
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print ZCAT $rpm;
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read $f, $rpm, 10240 ; # read in blocks
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}
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close ZCAT;
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