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From: Alexey Tourbin <at@altlinux.ru>
To: ALT Devel discussion list <devel@altlinux.org>
Subject: [devel] Re: librpm payload
Date: Sun, 11 Sep 2005 21:06:44 +0400
Message-ID: <20050911170644.GE3290@solemn.turbinal.org> (raw)
In-Reply-To: <20050905034357.GM3539@solemn.turbinal.org>


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On Mon, Sep 05, 2005 at 07:43:57AM +0400, Alexey Tourbin wrote:
> Как читать поток cpio, я разобрался.  Теперь дальше, как парсить cpio?
> У него какой-то хитрый padding (см. TODO).  Как libmagic подключить --
> вроде ясно, magic_buffer().
> 
> Что-то такое есть в rpm-4_0-4.0.4/lib/{cpio,fsm}.{c,h}, но им
> воспользоваться очень проблемно.

Нет, задолбало на Си писать.  Это контрпродуктивно.  Можно что-нибудь
сделать, а можно сидеть и пейсать на Си.  Ну его в баню.

Написал на шелле, с кешированием для каталогов.  Для робота это важно --
очень долго (с распаковкой всех rpm'ов) только один раз будет работать.

$ ./rpmfile -h
Usage:
    rpmfile [-h] [*FILE*...] [*DIR*...]

$ ./rpmfile ~/build/repo/i586/RPMS.hasher/qa-robot-0.2-alt1.noarch.rpm
/usr/bin/bugs	100755	Bourne shell script text executable
/usr/bin/csv2tab	100755	perl script text executable
...
$ ./rpmfile ~/build/repo/i586/RPMS.hasher |sort -t$'\t' -k1,1 -u
libsqlite3	/usr/lib/libsqlite3.so.0	120777	symbolic link to `libsqlite3.so.0.8.6'
libsqlite3-devel	/usr/include/sqlite3.h	100644	ASCII C program text
...
$

То есть если "дампить" каталог, то впереди добавляется ещё подно поле --
имя пакета.  Правильнее было бы добавлять не имя пакета, а собственно
имя файла, но мне сейчас нужнее имя пакета.

А кеширование работает так:

$ rm -rf ~/tmp/tmp
$ mkdir -p ~/tmp/tmp
$ time workdir=~/tmp/tmp ./rpmfile ~/build/repo/i586/RPMS.hasher >/dev/null
workdir=~/tmp/tmp ./rpmfile ~/build/repo/i586/RPMS.hasher > /dev/null  16,70s user 4,81s system 95% cpu 22,606 total
$ time workdir=~/tmp/tmp ./rpmfile ~/build/repo/i586/RPMS.hasher >/dev/null
workdir=~/tmp/tmp ./rpmfile ~/build/repo/i586/RPMS.hasher > /dev/null  1,46s user 0,22s system 99% cpu 1,685 total
$

Трюк с paste(1) -- по моему, красиво. :)

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#!/bin/sh -ef
export LC_ALL=C

dump_file()
{
	rpm -qp --qf '[%{FILENAMES}\t%{FILEMODES:octal}\n]' "$@" >files
	if [ -d d ]; then chmod -Rf u+rwX d; rm -rf d; fi
	rpm2cpio "$@" |(mkdir d; cd d; cpio -idmu --quiet)
	awk -F'\t' '{printf"d/%s\0",$1}' files |xargs -r0 file -b >types
	paste files types
}

dump_dir()
{
	local d="$1"; shift
	packages "$d" >packages
	sort -t$'\t' -o packages -u -k1,1 packages
	mkdir -p c
	while IFS=$'\t' read p v f _; do
		b="${f%%.rpm}"
		[ -f c/"$b" ] || dump_file "$d/$f" >c/"$b"
		awk -v p="$p" '{print p"\t"$0}' c/"$b"
	done <packages
}

while getopts h opt; do
	case "$opt" in
		h) pod2usage --exit=0 "$0"; exit 0 ;;
		*) pod2usage --exit=2 "$0"; exit 2 ;;
	esac
done
shift "$((OPTIND-1))"

if [ -z "$workdir" ]; then
	atexit() { rc=$?; trap - EXIT; rm -rf "$workdir"; exit $rc; }
	workdir="$(mktemp -d -t "${0##*/}.XXXXXXXX")"
	trap atexit EXIT HUP INT QUIT PIPE TERM
	export workdir
fi

if [ -z "$*" ]; then
	: ${sisyphus:=/raid/ALT/Sisyphus}
	set -- "$sisyphus"/files/i586/RPMS
fi

for arg; do
	arg="$(readlink -ev "${arg:?}")"
	cd "${workdir:?}"
	if [ -f "$arg" ]; then
		dump_file "$arg"
	else
		dump_dir "$arg"
	fi
	cd -
done

: <<'__EOF__'

=head1	NAME

rpmfile - list file modes and types in RPM packages

=head1	SYNOPSIS

B<rpmfile> [B<-h>] [I<FILE>...] [I<DIR>...]

=head1	AUTHOR

Written by Alexey Tourbin <at@altlinux.org>.

=head1	COPYING

Copyright (c) 2005 Alexey Tourbin, ALT Linux Team.

This is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software Foundation;
either version 2 of the License, or (at your option) any later version.

=head1	SEE ALSO

rpm(8),
rpm2cpio(8),
file(1)

=cut

__EOF__

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  parent reply	other threads:[~2005-09-11 17:06 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-09-02 20:14 [devel] " Alexey Tourbin
2005-09-02 21:00 ` Dmitry V. Levin
2005-09-05  3:43   ` [devel] " Alexey Tourbin
2005-09-05  9:09     ` Sergey Vlasov
2005-09-11 17:06     ` Alexey Tourbin [this message]
2005-09-11 22:14       ` Dmitry V. Levin
2005-09-12  3:48         ` Alexey Tourbin
2005-09-12 10:28           ` Dmitry V. Levin
2005-09-13  8:51             ` [devel] rpmfile Alexey Tourbin

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