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# Copyright 1999-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: portability.eclass
# @MAINTAINER:
# base-system@gentoo.org
# @AUTHOR:
# Diego Pettenò <flameeyes@gentoo.org>
# @SUPPORTED_EAPIS: 5 6 7
# @BLURB: This eclass is created to avoid using non-portable GNUisms inside ebuilds
case ${EAPI:-0} in
[567]) ;;
*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac
if [[ -z ${_PORTABILITY_ECLASS} ]]; then
_PORTABILITY_ECLASS=1
# @FUNCTION: treecopy
# @USAGE: <orig1> [orig2 orig3 ....] <dest>
# @DESCRIPTION:
# mimic cp --parents copy, but working on BSD userland as well
treecopy() {
local dest=${!#}
local files_count=$#
while (( $# > 1 )); do
local dirstruct=$(dirname "$1")
mkdir -p "${dest}/${dirstruct}" || die
cp -pPR "$1" "${dest}/${dirstruct}" || die
shift
done
}
# @FUNCTION: seq
# @USAGE: [min] <max> [step]
# @RETURN: sequence from min to max regardless of seq command being present on system
# @DESCRIPTION:
# compatibility function that mimes seq command if not available
seq() {
# First try `seq`
local p=$(type -P seq)
if [[ -n ${p} ]] ; then
"${p}" "$@" || die
return $?
fi
local min max step
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 || die
return $?
fi
# Screw it, do the output ourselves
while :; do
[[ $max -lt $min && $step -gt 0 ]] && break
[[ $min -lt $max && $step -gt 0 ]] && break
echo $min
: $(( min += step ))
done
return 0
}
# @FUNCTION: dlopen_lib
# @USAGE:
# @RETURN: linker flag if needed
# @DESCRIPTION:
# Gets the linker flag to link to dlopen() function
dlopen_lib() {
# - Solaris needs nothing
# - Darwin needs nothing
# - *BSD needs nothing
# - Linux needs -ldl (glibc and uclibc)
# - Interix needs -ldl
case "${CHOST}" in
*-linux-gnu*|*-linux-uclibc|*-interix*)
echo "-ldl"
;;
esac
}
# @FUNCTION: get_bmake
# @USAGE:
# @RETURN: system version of make
# @DESCRIPTION:
# Gets the name of the BSD-ish make command (bmake 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 [[ ${CBUILD:-${CHOST}} == *bsd* ]]; then
echo make
elif [[ ${CBUILD:-${CHOST}} == *darwin* ]]; then
echo bsdmake
else
echo bmake
fi
}
# @FUNCTION: get_mounts
# @USAGE:
# @RETURN: table of mounts in form "point node fs opts"
# @DESCRIPTION:
# 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
}
fi
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