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Revision 1.25 - (show annotations) (download)
Wed May 28 09:48:01 2014 UTC (6 weeks, 1 day ago) by jlec
Branch: MAIN
CVS Tags: HEAD
Changes since 1.24: +34 -16 lines
Add documentation for man page; add missing die

1 # Copyright 1999-2014 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.24 2012/01/04 05:57:19 vapier Exp $
4
5 # @ECLASS: portability.eclass
6 # @MAINTAINER:
7 # base-system@gentoo.org
8 # @AUTHOR:
9 # Diego Pettenò <flameeyes@gentoo.org>
10 # @BLURB: This eclass is created to avoid using non-portable GNUisms inside ebuilds
11
12 if [[ ${___ECLASS_ONCE_PORTABILITY} != "recur -_+^+_- spank" ]] ; then
13 ___ECLASS_ONCE_PORTABILITY="recur -_+^+_- spank"
14
15 # @FUNCTION: treecopy
16 # @USAGE: <orig1> [orig2 orig3 ....] <dest>
17 # @RETURN:
18 # @DESCRIPTION:
19 # mimic cp --parents copy, but working on BSD userland as well
20 treecopy() {
21 local dest=${!#}
22 local files_count=$#
23
24 while (( $# > 1 )); do
25 local dirstruct=$(dirname "$1")
26 mkdir -p "${dest}/${dirstruct}" || die
27 cp -pPR "$1" "${dest}/${dirstruct}" || die
28
29 shift
30 done
31 }
32
33 # @FUNCTION: seq
34 # @USAGE: [min] <max> [step]
35 # @RETURN: sequence from min to max regardless of seq command being present on system
36 # @DESCRIPTION:
37 # compatibility function that mimes seq command if not available
38 seq() {
39 # First try `seq`
40 local p=$(type -P seq)
41 if [[ -n ${p} ]] ; then
42 "${p}" "$@" || die
43 return $?
44 fi
45
46 local min max step
47 case $# in
48 1) min=1 max=$1 step=1 ;;
49 2) min=$1 max=$2 step=1 ;;
50 3) min=$1 max=$3 step=$2 ;;
51 *) die "seq called with wrong number of arguments" ;;
52 esac
53
54 # Then try `jot`
55 p=$(type -P jot)
56 if [[ -n ${p} ]] ; then
57 local reps
58 # BSD userland
59 if [[ ${step} != 0 ]] ; then
60 reps=$(( (max - min) / step + 1 ))
61 else
62 reps=0
63 fi
64
65 jot $reps $min $max $step || die
66 return $?
67 fi
68
69 # Screw it, do the output ourselves
70 while :; do
71 [[ $max < $min && $step > 0 ]] && break
72 [[ $min < $max && $step < 0 ]] && break
73 echo $min
74 : $(( min += step ))
75 done
76 return 0
77 }
78
79 # @FUNCTION: dlopen_lib
80 # @USAGE:
81 # @RETURN: linker flag if needed
82 # @DESCRIPTION:
83 # Gets the linker flag to link to dlopen() function
84 dlopen_lib() {
85 # - Solaris needs nothing
86 # - Darwin needs nothing
87 # - *BSD needs nothing
88 # - Linux needs -ldl (glibc and uclibc)
89 # - Interix needs -ldl
90 case "${CHOST}" in
91 *-linux-gnu*|*-linux-uclibc|*-interix*)
92 echo "-ldl"
93 ;;
94 esac
95 }
96
97 # @FUNCTION: get_bmake
98 # @USAGE:
99 # @RETURN: system version of make
100 # @DESCRIPTION:
101 # Gets the name of the BSD-ish make command (pmake from NetBSD)
102 #
103 # This will return make (provided by system packages) for BSD userlands,
104 # or bsdmake for Darwin userlands and pmake for the rest of userlands,
105 # both of which are provided by sys-devel/pmake package.
106 #
107 # Note: the bsdmake for Darwin userland is with compatibility with MacOSX
108 # default name.
109 get_bmake() {
110 if [[ ${USERLAND} == *BSD ]]; then
111 echo make
112 elif [[ ${USERLAND} == "Darwin" ]]; then
113 echo bsdmake
114 else
115 echo pmake
116 fi
117 }
118
119 # @FUNCTION: get_mounts
120 # @USAGE:
121 # @RETURN: table of mounts in form "point node fs opts"
122 # @MAINTAINER:
123 # @DESCRIPTION:
124 # Portable method of getting mount names and points.
125 # Returns as "point node fs options"
126 # Remember to convert 040 back to a space.
127 get_mounts() {
128 local point= node= fs= opts= foo=
129
130 # Linux has /proc/mounts which should always exist
131 if [[ $(uname -s) == "Linux" ]] ; then
132 while read node point fs opts foo ; do
133 echo "${point} ${node} ${fs} ${opts}"
134 done < /proc/mounts
135 return
136 fi
137
138 # OK, pray we have a -p option that outputs mounts in fstab format
139 # using tabs as the seperator.
140 # Then pray that there are no tabs in the either.
141 # Currently only FreeBSD supports this and the other BSDs will
142 # have to be patched.
143 # Athough the BSD's may support /proc, they do NOT put \040 in place
144 # of the spaces and we should not force a /proc either.
145 local IFS=$'\t'
146 LC_ALL=C mount -p | while read node point fs foo ; do
147 opts=${fs#* }
148 fs=${fs%% *}
149 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
150 done
151 }
152
153 _dead_portability_user_funcs() { die "if you really need this, please file a bug for base-system@gentoo.org"; }
154 is-login-disabled() { _dead_portability_user_funcs; }
155
156 fi

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