/[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 1.9 2006/11/06 13:55:04 uberlord Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.17 2010/09/24 14:29:49 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#
26 26
27# seq min max 27# seq min max
28# 28#
29# compatibility function that mimes seq command if not available 29# compatibility function that mimes seq command if not available
30seq() { 30seq() {
31 # First try `seq`
31 local p=$(type -P seq) 32 local p=$(type -P seq)
33 if [[ -n ${p} ]] ; then
34 "${p}" "$@"
35 return $?
36 fi
32 37
33 case $# in 38 case $# in
34 1) min=1 max=$1 step=1 ;; 39 1) min=1 max=$1 step=1 ;;
35 2) min=$1 max=$2 step=1 ;; 40 2) min=$1 max=$2 step=1 ;;
36 3) min=$1 max=$3 step=$2 ;; 41 3) min=$1 max=$3 step=$2 ;;
37 *) die "seq called with wrong number of arguments" ;; 42 *) die "seq called with wrong number of arguments" ;;
38 esac 43 esac
39 44
45 # Then try `jot`
46 p=$(type -P jot)
40 if [[ -z ${p} ]] ; then 47 if [[ -n ${p} ]] ; then
41 local reps 48 local reps
42 # BSD userland 49 # BSD userland
43 if [[ ${step} != 0 ]]; then 50 if [[ ${step} != 0 ]] ; then
44 reps=$(( ($max-$min) / $step +1 )) 51 reps=$(( (max - min) / step + 1 ))
45 else 52 else
46 reps=0 53 reps=0
47 fi 54 fi
48 55
49 jot $reps $min $max $step 56 jot $reps $min $max $step
50 else 57 return $?
51 "${p}" $min $step $max
52 fi 58 fi
59
60 # Screw it, do the output ourselves
61 while :; do
62 [[ $max < $min && $step > 0 ]] && break
63 [[ $min < $max && $step < 0 ]] && break
64 echo $min
65 : $(( min += step ))
66 done
67 return 0
53} 68}
54 69
55# Gets the linker flag to link to dlopen() function 70# Gets the linker flag to link to dlopen() function
56dlopen_lib() { 71dlopen_lib() {
57 if [[ ${ELIBC} != *BSD ]]; then 72 # - Solaris needs nothing
73 # - Darwin needs nothing
74 # - *BSD needs nothing
75 # - Linux needs -ldl (glibc and uclibc)
76 # - Interix needs -ldl
77 case "${CHOST}" in
78 *-linux-gnu*|*-linux-uclibc|*-interix*)
58 echo "-ldl" 79 echo "-ldl"
59 fi 80 ;;
81 esac
60} 82}
61 83
62# Gets the home directory for the specified user 84# Gets the home directory for the specified user
63# it's a wrap around egetent as the position of the home directory in the line 85# it's a wrap around egetent as the position of the home directory in the line
64# varies depending on the os used. 86# varies depending on the os used.
129 echo pmake 151 echo pmake
130 fi 152 fi
131} 153}
132 154
133# Portable method of getting mount names and points. 155# Portable method of getting mount names and points.
134# Returns as "point node fs" 156# Returns as "point node fs options"
135# Remember to convert 040 back to a space. 157# Remember to convert 040 back to a space.
136get_mounts() { 158get_mounts() {
137 local point= node= fs= foo= 159 local point= node= fs= opts= foo=
138 160
139 # Linux has /proc/mounts which should always exist 161 # Linux has /proc/mounts which should always exist
140 if [[ $(uname -s) == "Linux" ]] ; then 162 if [[ $(uname -s) == "Linux" ]] ; then
141 while read node point fs foo ; do 163 while read node point fs opts foo ; do
142 echo "${point} ${node} ${fs}" 164 echo "${point} ${node} ${fs} ${opts}"
143 done < /proc/mounts 165 done < /proc/mounts
144 return 166 return
145 fi 167 fi
146 168
147 # OK, pray we have a -p option that outputs mounts in fstab format 169 # OK, pray we have a -p option that outputs mounts in fstab format
148 # using tabs as the seperator. 170 # using tabs as the seperator.
149 # Then pray that there are no tabs in the either. 171 # Then pray that there are no tabs in the either.
151 # have to be patched. 173 # have to be patched.
152 # Athough the BSD's may support /proc, they do NOT put \040 in place 174 # Athough the BSD's may support /proc, they do NOT put \040 in place
153 # of the spaces and we should not force a /proc either. 175 # of the spaces and we should not force a /proc either.
154 local IFS=$'\t' 176 local IFS=$'\t'
155 LC_ALL=C mount -p | while read node point fs foo ; do 177 LC_ALL=C mount -p | while read node point fs foo ; do
178 opts=${fs#* }
179 fs=${fs%% *}
156 echo "${point// /\040} ${node// /\040} ${fs%% *}" 180 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
157 done 181 done
158} 182}
159 183

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