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Revision 1.24 - (show annotations) (download)
Wed Jan 4 05:57:19 2012 UTC (2 years, 9 months ago) by vapier
Branch: MAIN
Changes since 1.23: +6 -5 lines
add missing "local" markings for variables

1 # Copyright 1999-2011 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.23 2011/12/27 17:55:12 fauli Exp $
4 #
5 # Author: Diego Pettenò <flameeyes@gentoo.org>
6 #
7 # This eclass is created to avoid using non-portable GNUisms inside ebuilds
8 #
9 # NB: If you add anything, please comment it!
10
11 if [[ ${___ECLASS_ONCE_PORTABILITY} != "recur -_+^+_- spank" ]] ; then
12 ___ECLASS_ONCE_PORTABILITY="recur -_+^+_- spank"
13
14 # treecopy orig1 orig2 orig3 .... dest
15 #
16 # mimic cp --parents copy, but working on BSD userland as well
17 treecopy() {
18 local dest=${!#}
19 local files_count=$#
20
21 while (( $# > 1 )); do
22 local dirstruct=$(dirname "$1")
23 mkdir -p "${dest}/${dirstruct}"
24 cp -pPR "$1" "${dest}/${dirstruct}"
25
26 shift
27 done
28 }
29
30 # seq min max
31 #
32 # compatibility function that mimes seq command if not available
33 seq() {
34 # First try `seq`
35 local p=$(type -P seq)
36 if [[ -n ${p} ]] ; then
37 "${p}" "$@"
38 return $?
39 fi
40
41 local min max step
42 case $# in
43 1) min=1 max=$1 step=1 ;;
44 2) min=$1 max=$2 step=1 ;;
45 3) min=$1 max=$3 step=$2 ;;
46 *) die "seq called with wrong number of arguments" ;;
47 esac
48
49 # Then try `jot`
50 p=$(type -P jot)
51 if [[ -n ${p} ]] ; then
52 local reps
53 # BSD userland
54 if [[ ${step} != 0 ]] ; then
55 reps=$(( (max - min) / step + 1 ))
56 else
57 reps=0
58 fi
59
60 jot $reps $min $max $step
61 return $?
62 fi
63
64 # Screw it, do the output ourselves
65 while :; do
66 [[ $max < $min && $step > 0 ]] && break
67 [[ $min < $max && $step < 0 ]] && break
68 echo $min
69 : $(( min += step ))
70 done
71 return 0
72 }
73
74 # Gets the linker flag to link to dlopen() function
75 dlopen_lib() {
76 # - Solaris needs nothing
77 # - Darwin needs nothing
78 # - *BSD needs nothing
79 # - Linux needs -ldl (glibc and uclibc)
80 # - Interix needs -ldl
81 case "${CHOST}" in
82 *-linux-gnu*|*-linux-uclibc|*-interix*)
83 echo "-ldl"
84 ;;
85 esac
86 }
87
88 # Gets the name of the BSD-ish make command (pmake from NetBSD)
89 #
90 # This will return make (provided by system packages) for BSD userlands,
91 # or bsdmake for Darwin userlands and pmake for the rest of userlands,
92 # both of which are provided by sys-devel/pmake package.
93 #
94 # Note: the bsdmake for Darwin userland is with compatibility with MacOSX
95 # default name.
96 get_bmake() {
97 if [[ ${USERLAND} == *BSD ]]; then
98 echo make
99 elif [[ ${USERLAND} == "Darwin" ]]; then
100 echo bsdmake
101 else
102 echo pmake
103 fi
104 }
105
106 # Portable method of getting mount names and points.
107 # Returns as "point node fs options"
108 # Remember to convert 040 back to a space.
109 get_mounts() {
110 local point= node= fs= opts= foo=
111
112 # Linux has /proc/mounts which should always exist
113 if [[ $(uname -s) == "Linux" ]] ; then
114 while read node point fs opts foo ; do
115 echo "${point} ${node} ${fs} ${opts}"
116 done < /proc/mounts
117 return
118 fi
119
120 # OK, pray we have a -p option that outputs mounts in fstab format
121 # using tabs as the seperator.
122 # Then pray that there are no tabs in the either.
123 # Currently only FreeBSD supports this and the other BSDs will
124 # have to be patched.
125 # Athough the BSD's may support /proc, they do NOT put \040 in place
126 # of the spaces and we should not force a /proc either.
127 local IFS=$'\t'
128 LC_ALL=C mount -p | while read node point fs foo ; do
129 opts=${fs#* }
130 fs=${fs%% *}
131 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
132 done
133 }
134
135 _dead_portability_user_funcs() { die "if you really need this, please file a bug for base-system@gentoo.org"; }
136 is-login-disabled() { _dead_portability_user_funcs; }
137
138 fi

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