/[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 1.19 2011/10/31 17:39:52 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 local p 31 # First try `seq`
32 p=$(type -P seq) 32 local p=$(type -P seq)
33 if [[ -n ${p} ]] ; then
34 "${p}" "$@"
35 return $?
36 fi
33 37
34 case $# in 38 case $# in
35 1) 39 1) min=1 max=$1 step=1 ;;
36 min=1 40 2) min=$1 max=$2 step=1 ;;
37 max=$1 41 3) min=$1 max=$3 step=$2 ;;
38 step=1 42 *) 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=$2
49 ;;
50 *)
51 die "seq called with wrong parameters number"
52 esac 43 esac
53 44
45 # Then try `jot`
46 p=$(type -P jot)
54 if [[ -z "${p}" ]]; then 47 if [[ -n ${p} ]] ; then
55 local reps 48 local reps
56 # BSD userland 49 # BSD userland
57 if [[ ${step} != 0 ]]; then 50 if [[ ${step} != 0 ]] ; then
58 reps=$(( ($max-$min) / $step +1 )) 51 reps=$(( (max - min) / step + 1 ))
59 else 52 else
60 reps=0 53 reps=0
61 fi 54 fi
62 55
63 jot $reps $min $max $step 56 jot $reps $min $max $step
64 else 57 return $?
65 "${p}" $min $step $max
66 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
67} 68}
68 69
69# Gets the linker flag to link to dlopen() function 70# Gets the linker flag to link to dlopen() function
70dlopen_lib() { 71dlopen_lib() {
71 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*)
72 echo "-ldl" 79 echo "-ldl"
80 ;;
81 esac
82}
83
84# Gets the name of the BSD-ish make command (pmake from NetBSD)
85#
86# This will return make (provided by system packages) for BSD userlands,
87# or bsdmake for Darwin userlands and pmake for the rest of userlands,
88# both of which are provided by sys-devel/pmake package.
89#
90# Note: the bsdmake for Darwin userland is with compatibility with MacOSX
91# default name.
92get_bmake() {
93 if [[ ${USERLAND} == *BSD ]]; then
94 echo make
95 elif [[ ${USERLAND} == "Darwin" ]]; then
96 echo bsdmake
97 else
98 echo pmake
73 fi 99 fi
74} 100}
75 101
102# Portable method of getting mount names and points.
103# Returns as "point node fs options"
104# Remember to convert 040 back to a space.
105get_mounts() {
106 local point= node= fs= opts= foo=
107
108 # Linux has /proc/mounts which should always exist
109 if [[ $(uname -s) == "Linux" ]] ; then
110 while read node point fs opts foo ; do
111 echo "${point} ${node} ${fs} ${opts}"
112 done < /proc/mounts
113 return
114 fi
115
116 # OK, pray we have a -p option that outputs mounts in fstab format
117 # using tabs as the seperator.
118 # Then pray that there are no tabs in the either.
119 # Currently only FreeBSD supports this and the other BSDs will
120 # have to be patched.
121 # Athough the BSD's may support /proc, they do NOT put \040 in place
122 # of the spaces and we should not force a /proc either.
123 local IFS=$'\t'
124 LC_ALL=C mount -p | while read node point fs foo ; do
125 opts=${fs#* }
126 fs=${fs%% *}
127 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
128 done
129}
130
131_dead_portability_user_funcs() { die "if you really need this, please file a bug for base-system@gentoo.org"; }
132egethome() { _dead_portability_user_funcs; }
133egetshell() { _dead_portability_user_funcs; }
134is-login-disabled() { _dead_portability_user_funcs; }

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