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Revision 1.23 - (show annotations) (download)
Tue Dec 27 17:55:12 2011 UTC (2 years, 3 months ago) by fauli
Branch: MAIN
Changes since 1.22: +2 -2 lines
Update copyright years in headers

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 1.22 2011/12/10 20:03:17 vapier 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 [[ ${___ECLASS_ONCE_PORTABILITY} != "recur -_+^+_- spank" ]] ; then
12 ___ECLASS_ONCE_PORTABILITY="recur -_+^+_- spank"
13
14 # treecopy orig1 orig2 orig3 .... dest
15 #
16 # mimic cp --parents copy, but working on BSD userland as well
17 treecopy() {
18 dest=${!#}
19 files_count=$#
20
21 while(( $# > 1 )); do
22 dirstruct=$(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 case $# in
42 1) min=1 max=$1 step=1 ;;
43 2) min=$1 max=$2 step=1 ;;
44 3) min=$1 max=$3 step=$2 ;;
45 *) die "seq called with wrong number of arguments" ;;
46 esac
47
48 # Then try `jot`
49 p=$(type -P jot)
50 if [[ -n ${p} ]] ; then
51 local reps
52 # BSD userland
53 if [[ ${step} != 0 ]] ; then
54 reps=$(( (max - min) / step + 1 ))
55 else
56 reps=0
57 fi
58
59 jot $reps $min $max $step
60 return $?
61 fi
62
63 # Screw it, do the output ourselves
64 while :; do
65 [[ $max < $min && $step > 0 ]] && break
66 [[ $min < $max && $step < 0 ]] && break
67 echo $min
68 : $(( min += step ))
69 done
70 return 0
71 }
72
73 # Gets the linker flag to link to dlopen() function
74 dlopen_lib() {
75 # - Solaris needs nothing
76 # - Darwin needs nothing
77 # - *BSD needs nothing
78 # - Linux needs -ldl (glibc and uclibc)
79 # - Interix needs -ldl
80 case "${CHOST}" in
81 *-linux-gnu*|*-linux-uclibc|*-interix*)
82 echo "-ldl"
83 ;;
84 esac
85 }
86
87 # Gets the name of the BSD-ish make command (pmake from NetBSD)
88 #
89 # This will return make (provided by system packages) for BSD userlands,
90 # or bsdmake for Darwin userlands and pmake for the rest of userlands,
91 # both of which are provided by sys-devel/pmake package.
92 #
93 # Note: the bsdmake for Darwin userland is with compatibility with MacOSX
94 # default name.
95 get_bmake() {
96 if [[ ${USERLAND} == *BSD ]]; then
97 echo make
98 elif [[ ${USERLAND} == "Darwin" ]]; then
99 echo bsdmake
100 else
101 echo pmake
102 fi
103 }
104
105 # Portable method of getting mount names and points.
106 # Returns as "point node fs options"
107 # Remember to convert 040 back to a space.
108 get_mounts() {
109 local point= node= fs= opts= foo=
110
111 # Linux has /proc/mounts which should always exist
112 if [[ $(uname -s) == "Linux" ]] ; then
113 while read node point fs opts foo ; do
114 echo "${point} ${node} ${fs} ${opts}"
115 done < /proc/mounts
116 return
117 fi
118
119 # OK, pray we have a -p option that outputs mounts in fstab format
120 # using tabs as the seperator.
121 # Then pray that there are no tabs in the either.
122 # Currently only FreeBSD supports this and the other BSDs will
123 # have to be patched.
124 # Athough the BSD's may support /proc, they do NOT put \040 in place
125 # of the spaces and we should not force a /proc either.
126 local IFS=$'\t'
127 LC_ALL=C mount -p | while read node point fs foo ; do
128 opts=${fs#* }
129 fs=${fs%% *}
130 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
131 done
132 }
133
134 _dead_portability_user_funcs() { die "if you really need this, please file a bug for base-system@gentoo.org"; }
135 is-login-disabled() { _dead_portability_user_funcs; }
136
137 fi

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