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Diffstat (limited to 'eclass/portability.eclass')
| -rw-r--r-- | eclass/portability.eclass | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/eclass/portability.eclass b/eclass/portability.eclass new file mode 100644 index 0000000..3269a3c --- /dev/null +++ b/eclass/portability.eclass @@ -0,0 +1,183 @@ +# Copyright 1999-2005 Gentoo Foundation +# Distributed under the terms of the GNU General Public License v2 +# $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.17 2010/09/24 14:29:49 vapier Exp $ +# +# Author: Diego Pettenò <flameeyes@gentoo.org> +# +# This eclass is created to avoid using non-portable GNUisms inside ebuilds +# +# NB: If you add anything, please comment it! + +# treecopy orig1 orig2 orig3 .... dest +# +# mimic cp --parents copy, but working on BSD userland as well +treecopy() { + dest=${!#} + files_count=$# + + while(( $# > 1 )); do + dirstruct=$(dirname "$1") + mkdir -p "${dest}/${dirstruct}" + cp -pPR "$1" "${dest}/${dirstruct}" + + shift + done +} + +# seq min max +# +# compatibility function that mimes seq command if not available +seq() { + # First try `seq` + local p=$(type -P seq) + if [[ -n ${p} ]] ; then + "${p}" "$@" + return $? + fi + + case $# in + 1) min=1 max=$1 step=1 ;; + 2) min=$1 max=$2 step=1 ;; + 3) min=$1 max=$3 step=$2 ;; + *) die "seq called with wrong number of arguments" ;; + esac + + # Then try `jot` + p=$(type -P jot) + if [[ -n ${p} ]] ; then + local reps + # BSD userland + if [[ ${step} != 0 ]] ; then + reps=$(( (max - min) / step + 1 )) + else + reps=0 + fi + + jot $reps $min $max $step + return $? + fi + + # Screw it, do the output ourselves + while :; do + [[ $max < $min && $step > 0 ]] && break + [[ $min < $max && $step < 0 ]] && break + echo $min + : $(( min += step )) + done + return 0 +} + +# Gets the linker flag to link to dlopen() function +dlopen_lib() { + # - Solaris needs nothing + # - Darwin needs nothing + # - *BSD needs nothing + # - Linux needs -ldl (glibc and uclibc) + # - Interix needs -ldl + case "${CHOST}" in + *-linux-gnu*|*-linux-uclibc|*-interix*) + echo "-ldl" + ;; + esac +} + +# Gets the home directory for the specified user +# it's a wrap around egetent as the position of the home directory in the line +# varies depending on the os used. +# +# To use that, inherit eutils, not portability! +egethome() { + ent=$(egetent passwd $1) + + case ${CHOST} in + *-darwin*|*-freebsd*|*-dragonfly*) + # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir + echo ${ent} | cut -d: -f9 + ;; + *) + # Linux, NetBSD and OpenBSD use position 6 instead + echo ${ent} | cut -d: -f6 + ;; + esac +} + +# Gets the shell for the specified user +# it's a wrap around egetent as the position of the home directory in the line +# varies depending on the os used. +# +# To use that, inherit eutils, not portability! +egetshell() { + ent=$(egetent passwd "$1") + + case ${CHOST} in + *-darwin*|*-freebsd*|*-dragonfly*) + # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir + echo ${ent} | cut -d: -f10 + ;; + *) + # Linux, NetBSD and OpenBSD use position 6 instead + echo ${ent} cut -d: -f7 + ;; + esac +} + +# Returns true if specified user has a shell that precludes logins +# on whichever operating system. +is-login-disabled() { + shell=$(egetshell "$1") + + case ${shell} in + /bin/false|/usr/bin/false|/sbin/nologin|/usr/sbin/nologin) + return 0 ;; + *) + return 1 ;; + esac +} + +# Gets the name of the BSD-ish make command (pmake from NetBSD) +# +# This will return make (provided by system packages) for BSD userlands, +# or bsdmake for Darwin userlands and pmake for the rest of userlands, +# both of which are provided by sys-devel/pmake package. +# +# Note: the bsdmake for Darwin userland is with compatibility with MacOSX +# default name. +get_bmake() { + if [[ ${USERLAND} == *BSD ]]; then + echo make + elif [[ ${USERLAND} == "Darwin" ]]; then + echo bsdmake + else + echo pmake + fi +} + +# Portable method of getting mount names and points. +# Returns as "point node fs options" +# Remember to convert 040 back to a space. +get_mounts() { + local point= node= fs= opts= foo= + + # Linux has /proc/mounts which should always exist + if [[ $(uname -s) == "Linux" ]] ; then + while read node point fs opts foo ; do + echo "${point} ${node} ${fs} ${opts}" + done < /proc/mounts + return + fi + + # OK, pray we have a -p option that outputs mounts in fstab format + # using tabs as the seperator. + # Then pray that there are no tabs in the either. + # Currently only FreeBSD supports this and the other BSDs will + # have to be patched. + # Athough the BSD's may support /proc, they do NOT put \040 in place + # of the spaces and we should not force a /proc either. + local IFS=$'\t' + LC_ALL=C mount -p | while read node point fs foo ; do + opts=${fs#* } + fs=${fs%% *} + echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}" + done +} + |