/[gentoo-x86]/eclass/portability.eclass
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1# Copyright 1999-2005 Gentoo Foundation 1# Copyright 1999-2005 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.1 2005/09/18 17:33:44 flameeyes Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.18 2011/10/27 07:16:08 vapier Exp $
4# 4#
5# Author: Diego Pettenò <flameeyes@gentoo.org> 5# Author: Diego Pettenò <flameeyes@gentoo.org>
6# 6#
7# This eclass is created to avoid using non-portable GNUisms inside ebuilds 7# This eclass is created to avoid using non-portable GNUisms inside ebuilds
8# 8#
9# NB: If you add anything, please comment it! 9# NB: If you add anything, please comment it!
10
11inherit user
10 12
11# treecopy orig1 orig2 orig3 .... dest 13# treecopy orig1 orig2 orig3 .... dest
12# 14#
13# mimic cp --parents copy, but working on BSD userland as well 15# mimic cp --parents copy, but working on BSD userland as well
14treecopy() { 16treecopy() {
26 28
27# seq min max 29# seq min max
28# 30#
29# compatibility function that mimes seq command if not available 31# compatibility function that mimes seq command if not available
30seq() { 32seq() {
31 local p 33 # First try `seq`
32 p=$(type -P seq) 34 local p=$(type -P seq)
35 if [[ -n ${p} ]] ; then
36 "${p}" "$@"
37 return $?
38 fi
33 39
34 case $# in 40 case $# in
35 1) 41 1) min=1 max=$1 step=1 ;;
36 min=1 42 2) min=$1 max=$2 step=1 ;;
37 max=$1 43 3) min=$1 max=$3 step=$2 ;;
38 step=1 44 *) die "seq called with wrong number of arguments" ;;
39 ;;
40 2)
41 min=$1
42 max=$2
43 step=1
44 ;;
45 3)
46 min=$1
47 max=$3
48 step=$2
49 ;;
50 *)
51 die "seq called with wrong parameters number"
52 esac 45 esac
53 46
47 # Then try `jot`
48 p=$(type -P jot)
54 if [[ -z "${p}" ]]; then 49 if [[ -n ${p} ]] ; then
55 local reps 50 local reps
56 # BSD userland 51 # BSD userland
57 if [[ ${step} != 0 ]]; then 52 if [[ ${step} != 0 ]] ; then
58 reps=$(( ($max-$min) / $step +1 )) 53 reps=$(( (max - min) / step + 1 ))
59 else 54 else
60 reps=0 55 reps=0
61 fi 56 fi
62 57
63 jot $reps $min $max $step 58 jot $reps $min $max $step
64 else 59 return $?
65 "${p}" $min $step $max
66 fi 60 fi
61
62 # Screw it, do the output ourselves
63 while :; do
64 [[ $max < $min && $step > 0 ]] && break
65 [[ $min < $max && $step < 0 ]] && break
66 echo $min
67 : $(( min += step ))
68 done
69 return 0
67} 70}
68 71
69# Gets the linker flag to link to dlopen() function 72# Gets the linker flag to link to dlopen() function
70dlopen_lib() { 73dlopen_lib() {
71 if [[ ${ELIBC} != *BSD ]]; then 74 # - Solaris needs nothing
75 # - Darwin needs nothing
76 # - *BSD needs nothing
77 # - Linux needs -ldl (glibc and uclibc)
78 # - Interix needs -ldl
79 case "${CHOST}" in
80 *-linux-gnu*|*-linux-uclibc|*-interix*)
72 echo "-ldl" 81 echo "-ldl"
82 ;;
83 esac
84}
85
86# Gets the name of the BSD-ish make command (pmake from NetBSD)
87#
88# This will return make (provided by system packages) for BSD userlands,
89# or bsdmake for Darwin userlands and pmake for the rest of userlands,
90# both of which are provided by sys-devel/pmake package.
91#
92# Note: the bsdmake for Darwin userland is with compatibility with MacOSX
93# default name.
94get_bmake() {
95 if [[ ${USERLAND} == *BSD ]]; then
96 echo make
97 elif [[ ${USERLAND} == "Darwin" ]]; then
98 echo bsdmake
99 else
100 echo pmake
73 fi 101 fi
74} 102}
75 103
104# Portable method of getting mount names and points.
105# Returns as "point node fs options"
106# Remember to convert 040 back to a space.
107get_mounts() {
108 local point= node= fs= opts= foo=
109
110 # Linux has /proc/mounts which should always exist
111 if [[ $(uname -s) == "Linux" ]] ; then
112 while read node point fs opts foo ; do
113 echo "${point} ${node} ${fs} ${opts}"
114 done < /proc/mounts
115 return
116 fi
117
118 # OK, pray we have a -p option that outputs mounts in fstab format
119 # using tabs as the seperator.
120 # Then pray that there are no tabs in the either.
121 # Currently only FreeBSD supports this and the other BSDs will
122 # have to be patched.
123 # Athough the BSD's may support /proc, they do NOT put \040 in place
124 # of the spaces and we should not force a /proc either.
125 local IFS=$'\t'
126 LC_ALL=C mount -p | while read node point fs foo ; do
127 opts=${fs#* }
128 fs=${fs%% *}
129 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
130 done
131}

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