453 lines
15 KiB
Bash
Executable File
453 lines
15 KiB
Bash
Executable File
#!/bin/sh -efu
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#
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# This file provides FindPackage() function which maps paths and
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# commands, such as found in shell scripts, to rpm dependencies.
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#
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# Usage:
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# . @RPMCONFIGDIR@/find-package
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# FindPackage src [path...] [command...]
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#
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# Arguments:
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# src - the file being processed, used for diagnostics;
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# also, if the file appears to reside under */sbin/
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# directory, the PATH search order is adjusted
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# so as to better match root code
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# path - absolute path to file, e.g. /bin/cat
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# command - executable expected to reside under standard
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# PATH directories, e.g. cat
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#
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# Copyright (C) 2002-2003 Dmitry V. Levin <ldv@altlinux.org>
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# Copyright (C) 2007,2008 Alexey Tourbin <at@altlinux.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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. @RPMCONFIGDIR@/functions
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# We use different PATHs for */sbin/ and non-/sbin scripts. However,
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# the distinction is not quite reliable -- there is simply no easy way
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# to discriminate between root-only and user-capable shell code. Thus
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# we must use rather conservative path adjustment: 1) the set of user
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# and root directories is the same, it is only the order that differs;
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# 2) / has main priority over /usr, while as "bin vs sbin" distinction has
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# only secondary priority. The reason is that / has only "most important"
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# contents, and /usr is used virtually "for everything else", whatever it is.
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# Now that / has a boost, there are simply less chances to end up with
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# unrelated dependencies.
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DEF_RPM_FINDPACKAGE_USER_PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin:/usr/games
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DEF_RPM_FINDPACKAGE_ROOT_PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/games
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# RPM_FINDPACKAGE_PATH is exported by rpm-build
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RPM_FINDPACKAGE_USER_PATH="$(IFS="$IFS:"; set -f; echo '' ${RPM_FINDPACKAGE_PATH-} $DEF_RPM_FINDPACKAGE_USER_PATH |sed -e 's/ */:/g; s/^://')"
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RPM_FINDPACKAGE_ROOT_PATH="$(IFS="$IFS:"; set -f; echo '' ${RPM_FINDPACKAGE_PATH-} $DEF_RPM_FINDPACKAGE_ROOT_PATH |sed -e 's/ */:/g; s/^://')"
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Debug "RPM_FINDPACKAGE_USER_PATH=$RPM_FINDPACKAGE_USER_PATH"
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Debug "RPM_FINDPACKAGE_ROOT_PATH=$RPM_FINDPACKAGE_ROOT_PATH"
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# By default, FindPackage prefers virtual (most common) dependencies,
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# e.g. /usr/bin/perl -> /usr/bin/perl. This is good for executables.
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# However, some binary dependencies should explicitly map to host-system
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# package names, e.g. /usr/lib/libdb.so -> libdb4.4-devel. Localizing
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# the following variable with non-empty value will tweak FindPackage
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# to use the latter plan.
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RPM_FINDPACKAGE_HOST_PKG_NAMES=
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# When an interpreter is invoked by name, as in "#!/usr/bin/env python32",
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# and is missing, this can force the dependency on /usr/bin/python32.
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RPM_FINDPACKAGE_MANDATORY=
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# Below we use 'local Verbose=Info' to increase per-case verbosity.
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Verbose=Verbose
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FindByFileUnderBuildroot()
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{
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local f="$1" rep="$2" xbrep; shift 2 || return
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[ -n "${RPM_BUILD_ROOT-}" ] || return 0
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MatchBuildroot()
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{
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[ -n "$1" ] &&
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[ -z "${1##$RPM_BUILD_ROOT/*}" ]
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}
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StatPrint()
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{
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[ -e "$1" -o -L "$1" ] &&
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printf '%s\n' "${1#$RPM_BUILD_ROOT}"
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}
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xbrep=$(CanonPath "$RPM_BUILD_ROOT$rep")
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if MatchBuildroot "$xbrep"; then
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# Good. The path was canonicalized against buildroot.
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StatPrint "$xbrep" && return 0
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else
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# Too bad. The path was canonicalized outside buildroot.
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# They should fix their symbolic links.
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Warning "$f: $rep cannot be canonicalized under RPM_BUILD_ROOT"
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# Consider this: RPM_BUILD_ROOT/A/B/C -> /D/C
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# `-> /D
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# It still makes sense to check /D/C under RPM_BUILD_ROOT.
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xbrep=$(CanonPath "$RPM_BUILD_ROOT$xbrep")
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MatchBuildroot "$xbrep" && StatPrint "$xbrep" && return 0
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fi
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# They might also ask if /etc/init.d/foo is under RPM_BUILD_ROOT.
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# That would be /etc/rc.d/init.d/foo.
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xbrep=$(CanonPath "$rep")
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xbrep=$(CanonPath "$RPM_BUILD_ROOT$xbrep")
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MatchBuildroot "$xbrep" && StatPrint "$xbrep" && return 0
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# Not there. Not now.
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:
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}
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FindByFile()
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{
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# Dependence name starts with `/'.
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local f="$1" rep="$2" package; shift 2 || return
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# Does it start with %_builddir or %buildroot?
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if [ -n "${RPM_BUILD_DIR-}" ] && [ -z "${rep##$RPM_BUILD_DIR*}" ]; then
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Info "$f: invalid dependency: $rep"
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return 1
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fi
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if [ -n "${RPM_BUILD_ROOT-}" ] && [ -z "${rep##$RPM_BUILD_ROOT*}" ]; then
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Info "$f: invalid dependency: $rep"
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return 1
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fi
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# Does it belong to buildroot?
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local xbrep
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xbrep=$(FindByFileUnderBuildroot "$f" "$rep")
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if [ -n "$xbrep" ]; then
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# The file is under buildroot. We emit file-level dependency.
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# If the file is in the same package, rpm-build will optimize
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# out the dependency. Otherwise, the file is to be packaged
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# into another subpackage, and we get something like more strict
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# dependencies between subpackages.
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if [ ! -L "$RPM_BUILD_ROOT$xbrep" -a -d "$RPM_BUILD_ROOT$xbrep" ]; then
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# They require a directory. Here we do only "weak" directory
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# dependencies (i.e. sometimes we prefer to omit such dependencies).
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# We only need to make sure that the directory actually exists after
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# install, which is the case if there are packaged files under the
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# directory.
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local dirfiles
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if dirfiles=$(PackagedFiles |grep -F "$xbrep") &&
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dirfiles=$(echo '' $dirfiles '') &&
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[ -n "${dirfiles##* $xbrep *}" ] &&
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[ -z "${dirfiles##* $xbrep/*}" ]; then
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Warning "$f: directory $xbrep not owned by the package"
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return 0
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fi
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fi
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$Verbose "$f: $rep -> \$RPM_BUILD_ROOT$xbrep"
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printf '%s\n' "$xbrep"
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return 0
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fi
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# Is it an alternative? Path components can be alternatives, too.
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local alt_break= alt xalt xrep p
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xrep=$(readlink -vm "$rep")
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# Blind cleanup-only canonicalization required (the same as CanonPath first pass),
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# to fold intermediate path components. E.g. in /usr/share/foo/../java/rt.jar,
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# /usr/share/foo might not exist, but [ -L .../rt.jar ] test should still work.
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# XXX This "blind" technique is basically wrong -- one cannot always fold ".."
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# along with previous path component, specifically if the previous path component
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# is a symbolic link.
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p=$(readlink -vm "/-$$-/$rep")
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p=${p##/-$$-}
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while [ -n "$p" ]; do
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# Check each path component whether it is an alternative.
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if [ -L "$p" ] && readlink -v "$p" |grep -qs '^/etc/alternatives/'; then
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alt=$(CanonPath "$p")
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Verbose "$f: $rep -> $p -> $alt (alternative)"
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printf '%s\n' "$alt"
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# Now we have to decide if this alternative should eventually
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# prevent final $rep dependency resolution.
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xalt=$(readlink -vm "$p")
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case "$xrep" in
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"$xalt")
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# alternative and $rep are more or less the same
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alt_break=1 ;;
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"$xalt"/*)
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# $rep is under alternative dir, too bad
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Info "$f: alternative $alt prevents $rep dependency resolution"
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alt_break=1 ;;
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esac
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fi
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p=${p%/*}
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done
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[ -z "$alt_break" ] || return 0
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unset p alt_break alt xalt xrep ||:
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# Hard time checking $rep path components is over.
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# Now we are ready to apply our know-how.
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rep=$(CanonPath "$rep")
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# Ignore pseudo-filesystem dependencies.
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local dir="${rep#/}"; dir="${dir%%/*}"
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case "$dir" in
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dev | proc | sys )
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$Verbose "$f: $rep -> /$dir (skip)"
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return ;;
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esac
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unset dir
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if [ -n "$RPM_FINDPACKAGE_HOST_PKG_NAMES" ] &&
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package=$(rpmquery --whatprovides --queryformat='%{NAME}\n' -- "$rep" 2>/dev/null); then
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package=$(printf %s "$package" |LC_COLLATE=C sort -u)
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local n="$(IFS=$'\n'; set -- $package; echo $#)"
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if [ "$n" = 1 ]; then
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# Prune generic devel deps generated by pkgconfiglib.req and cpp.req.
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case $package in
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gcc | gcc-c++ | \
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gcc[34].[0-9] | gcc[34].[0-9]-c++ | \
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gcc[5-9] | gcc[5-9]-c++ | \
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libstdc++-devel | \
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libstdc++[34].[0-9]-devel | \
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libstdc++[5-9]-devel | \
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glibc-devel )
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$Verbose "$f: $rep -> $package (skip, generic devel)"
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;;
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*)
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$Verbose "$f: $rep -> $package (via rpmdb)"
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printf %s\\n "$package"
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;;
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esac
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return
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elif [ "$n" -gt 1 ]; then
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Info "$f: $rep provided by:$(echo '' $package)"
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Info "$f: $rep -> $rep (raw, ambiguous, via rpmdb)"
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printf %s\\n "$rep"
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return
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fi
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fi
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if [ -e "$rep" ] || rpmquery --whatprovides -- "$rep" >/dev/null 2>&1; then
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$Verbose "$f: $rep -> $rep (raw)"
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else
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Info "$f: $rep -> $rep (raw, not installed)"
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fi
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printf %s\\n "$rep"
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}
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FindByName()
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{
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local f="$1" r="$2" rep package; shift 2 || return
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local dir="${f%/*}"; dir="${dir#${RPM_BUILD_ROOT-}}"
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local findpackage_path="$RPM_FINDPACKAGE_USER_PATH"
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case "$dir" in
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*/sbin | "" ) # %buildroot dir is used to save scriptlets
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findpackage_path="$RPM_FINDPACKAGE_ROOT_PATH" ;;
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/etc/*)
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dir="${dir#/etc/}"; dir="${dir%%/*}"
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case "$dir" in
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# The sbin-ish places. WARNING: Explicit Content!
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rc.d | init.d | control.d | chroot.d | net | ppp | cron* | hotplug* )
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Debug "$f: root PATH on"
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findpackage_path="$RPM_FINDPACKAGE_ROOT_PATH" ;;
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esac
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;;
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esac
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unset dir
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# Check buildroot first.
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if [ -n "${RPM_BUILD_ROOT-}" ]; then
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rep=$(IFS="$IFS:"; set -f
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for dir in $findpackage_path; do
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rep="$dir/$r"
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BR_rep="$RPM_BUILD_ROOT/$rep"
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if [ -f "$BR_rep" -o -L "$BR_rep" ]; then
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printf '%s\n' "$rep"
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break
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fi
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done)
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if [ -n "$rep" ]; then
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$Verbose "$f: $r -> \$RPM_BUILD_ROOT$rep"
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printf '%s\n' "$rep"
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return
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fi
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fi
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# Record each command name we search.
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if [ -n "${RPM_FINDPACKAGE_COMMANDS_LOG-}" ]; then
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printf '%s\n' "$r" >>"$RPM_FINDPACKAGE_COMMANDS_LOG"
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fi
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# Check for pkg contents binary index.
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local save_rep= save_package=
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if [ -n "${RPM_PKG_CONTENTS_INDEX_BIN-}" ] && [ -s "$RPM_PKG_CONTENTS_INDEX_BIN" ] && [ -r "$RPM_PKG_CONTENTS_INDEX_BIN" ]; then
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local out="$(awk -v r="$r" -v findpackage_path="$findpackage_path" '
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BEGIN {
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# Here we enumerate all possible paths to keep the order;
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# later we sort the result with "sort -n".
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n = split(findpackage_path, ary, ":")
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for (i = 1; i <= n; i++) {
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dir = ary[i]
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sub("/+$", "", dir)
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file = dir "/" r
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if (dir && !(file in FILES))
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FILES[file] = i
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}
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# By now FILES is normally something like this:
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# /bin/r 1
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# /sbin/r 2
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# /usr/bin/r 3
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# /usr/sbin/r 4
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# ...
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}
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NF==2 && ($1 in FILES) {
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# Possible output is like this:
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# 3 /usr/bin/r pkgA
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# 1 /bin/r pkgB
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print FILES[$1] "\t" $1 "\t" $2
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}
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' "$RPM_PKG_CONTENTS_INDEX_BIN" |
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# Best paths go first:
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sort -n |
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# For each package, keep only the best path:
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sort -u -k3 |
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# Best paths still go first:
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sort -n |
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# Well done, discard numbers.
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cut -f2-)"
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local n="$(IFS=$'\n'; set -- $out; echo $#)"
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if [ "$n" = 1 ]; then
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rep="$(IFS=$'\t\n'; set -- $out; printf %s "$1")"
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package="$(IFS=$'\t\n'; set -- $out; printf %s "$2")"
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$Verbose "$f: $r -> $rep -> $package (via contents_index_bin)"
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printf %s\\n "$package"
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return
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elif [ "$n" -gt 1 ]; then
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# Content index search produced a confict: we have 2 or more paths
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# from different packages. Consider this case:
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# /usr/bin/r pkgA
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# /usr/bin/r pkgB
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# /usr/sbin/r pkgC
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# Remember that best paths go first, and each package has only the best path.
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# Now if the first two paths are the same, we produce raw dependency on /usr/bin/r.
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local Verbose=Info
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Info "$f: $r indexed by:$(printf %s "$out" |sed -e 's/\t/ -> /; s/$/,/; $s/,$//' |xargs echo '')"
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rep="$(IFS=$'\t\n'; set -- $out; printf %s "$1")"
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package="$(IFS=$'\t\n'; set -- $out; printf %s "$2")"
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# Actually our contents_index generator already handles path dups,
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# so the above example is likely to transform into this:
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# /usr/bin/r /usr/bin/r
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# /usr/sbin/r pkgC
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# So we first check if path = package.
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if [ "$rep" = "$package" ]; then
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Info "$f: $r -> $rep -> $rep (ambiguous, via contents_index_bin)"
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printf %s\\n "$rep"
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return
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fi
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# And then we check if the first two paths are the same.
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local rep2="$(IFS=$'\t\n'; set -- $out; printf %s "$3")"
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if [ "$rep" = "$rep2" ]; then
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Info "$f: $r -> $rep -> $rep (raw, ambiguous, via contents_index_bin)"
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printf %s\\n "$rep"
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return
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fi
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# However, consider yet worse real-life case:
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# /usr/bin/arpsend arpsend
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# /usr/sbin/arpsend vzctl
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# In this case, we perfer to put aside the conflict for a while, and query
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# the host system first. There's a good chance that the right package, either
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# arpsend or vzctl, IS installed, and other unrelated packages are NOT installed.
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# However, if the host system does not provide any candidate, we have to produce
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# the dependency on /usr/bin/arpsend -> arpsend.
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save_rep="$rep" save_package="$package"
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fi
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fi
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# Lookup in the host system.
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rep=$(IFS="$IFS:"; set -f
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for dir in $findpackage_path; do
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rep="$dir/$r"
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if [ -f "$rep" ]; then
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printf '%s\n' "$rep"
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fi
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done)
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if [ -n "$rep" ]; then
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local n="$(IFS=$'\n'; set -- $rep; echo $#)"
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if [ "$n" -gt 1 ]; then
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# We've got a few paths, e.g. awk -> {/bin/awk,/usr/bin/awk};
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# we check if all paths really point to the same file.
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n="$(IFS=$'\n'; for f in $rep; do readlink -vm "$f"; done |sort -u |wc -l)"
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if [ "$n" -gt 1 ]; then
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local Verbose=Info
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Info "$f: host_env $r:$(echo '' $rep)"
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fi
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# But we select the first path, which is the best, anyway.
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rep="$(IFS=$'\n'; set -- $rep; printf %s "$1")"
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fi
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if [ -n "$rep" ]; then
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$Verbose "$f: $r -> $rep -> ... (via host_env)"
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local RPM_FINDPACKAGE_HOST_PKG_NAMES=1
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FindByFile "$f" "$rep"
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return
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fi
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fi
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# Reconsult package binary index.
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if [ -n "$save_rep" ] && [ -n "$save_package" ]; then
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rep="$save_rep" package="$save_package"
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$Verbose "$f: $r -> $rep -> $package (via contents_index_bin)"
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printf %s\\n "$package"
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return
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fi
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# Not found.
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local maybe_function=
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case "$r" in
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*[!A-Za-z0-9_]*) ;;
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[!A-Za-z_]*) ;;
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*[A-Z_]*) maybe_function=1 ;;
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esac
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if [ -n "$RPM_FINDPACKAGE_MANDATORY" ]; then
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Info "$f: $r not found, forcing /usr/bin/$r"
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printf '%s\n' "/usr/bin/$r"
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elif [ -n "$maybe_function" ]; then
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$Verbose "$f: $r not found (skip, maybe function)"
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else
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Info "$f: $r not found (skip)"
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fi
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}
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FindPackage()
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{
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local f="$1" r; shift || return
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for r; do
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local Verbose=Verbose
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# Only these characters are allowed for pathnames or commands:
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valid='A-Za-z0-9/@=.,:_+-'
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case "$r" in
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/*[!$valid]*)
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Info "$f: invalid pathname: $r" ;;
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/*[!/.]*)
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FindByFile "$f" "$r" ;;
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*/*)
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Info "$f: invalid pathname: $r" ;;
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-*)
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Info "$f: invalid command: $r" ;;
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|
*[!$valid]*)
|
|
Info "$f: invalid command: $r" ;;
|
|
'')
|
|
Verbose "$f: empty command?" ;;
|
|
*)
|
|
FindByName "$f" "$r" ;;
|
|
esac
|
|
done
|
|
}
|