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# 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
}
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