/[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 1.15 2010/02/26 18:09:43 grobian 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
32 p=$(type -P seq) 31 local p=$(type -P seq)
33 32
34 case $# in 33 case $# in
35 1) 34 1) min=1 max=$1 step=1 ;;
36 min=1 35 2) min=$1 max=$2 step=1 ;;
37 max=$1 36 3) min=$1 max=$3 step=$2 ;;
38 step=1 37 *) 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=$2
49 ;;
50 *)
51 die "seq called with wrong parameters number"
52 esac 38 esac
53 39
54 if [[ -z "${p}" ]]; then 40 if [[ -z ${p} ]] ; then
55 local reps 41 local reps
56 # BSD userland 42 # BSD userland
57 if [[ ${step} != 0 ]]; then 43 if [[ ${step} != 0 ]]; then
58 reps=$(( ($max-$min) / $step +1 )) 44 reps=$(( ($max-$min) / $step +1 ))
59 else 45 else
66 fi 52 fi
67} 53}
68 54
69# Gets the linker flag to link to dlopen() function 55# Gets the linker flag to link to dlopen() function
70dlopen_lib() { 56dlopen_lib() {
71 if [[ ${ELIBC} != *BSD ]]; then 57 # - Solaris needs nothing
58 # - Darwin needs nothing
59 # - *BSD needs nothing
60 # - Linux needs -ldl (glibc and uclibc)
61 # - Interix needs -ldl
62 case "${CHOST}" in
63 *-linux-gnu*|*-linux-uclibc|*-interix*)
72 echo "-ldl" 64 echo "-ldl"
65 ;;
66 esac
67}
68
69# Gets the home directory for the specified user
70# it's a wrap around egetent as the position of the home directory in the line
71# varies depending on the os used.
72#
73# To use that, inherit eutils, not portability!
74egethome() {
75 ent=$(egetent passwd $1)
76
77 case ${CHOST} in
78 *-darwin*|*-freebsd*|*-dragonfly*)
79 # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
80 echo ${ent} | cut -d: -f9
81 ;;
82 *)
83 # Linux, NetBSD and OpenBSD use position 6 instead
84 echo ${ent} | cut -d: -f6
85 ;;
86 esac
87}
88
89# Gets the shell for the specified user
90# it's a wrap around egetent as the position of the home directory in the line
91# varies depending on the os used.
92#
93# To use that, inherit eutils, not portability!
94egetshell() {
95 ent=$(egetent passwd "$1")
96
97 case ${CHOST} in
98 *-darwin*|*-freebsd*|*-dragonfly*)
99 # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
100 echo ${ent} | cut -d: -f10
101 ;;
102 *)
103 # Linux, NetBSD and OpenBSD use position 6 instead
104 echo ${ent} cut -d: -f7
105 ;;
106 esac
107}
108
109# Returns true if specified user has a shell that precludes logins
110# on whichever operating system.
111is-login-disabled() {
112 shell=$(egetshell "$1")
113
114 case ${shell} in
115 /bin/false|/usr/bin/false|/sbin/nologin|/usr/sbin/nologin)
116 return 0 ;;
117 *)
118 return 1 ;;
119 esac
120}
121
122# Gets the name of the BSD-ish make command (pmake from NetBSD)
123#
124# This will return make (provided by system packages) for BSD userlands,
125# or bsdmake for Darwin userlands and pmake for the rest of userlands,
126# both of which are provided by sys-devel/pmake package.
127#
128# Note: the bsdmake for Darwin userland is with compatibility with MacOSX
129# default name.
130get_bmake() {
131 if [[ ${USERLAND} == *BSD ]]; then
132 echo make
133 elif [[ ${USERLAND} == "Darwin" ]]; then
134 echo bsdmake
135 else
136 echo pmake
73 fi 137 fi
74} 138}
75 139
140# Portable method of getting mount names and points.
141# Returns as "point node fs options"
142# Remember to convert 040 back to a space.
143get_mounts() {
144 local point= node= fs= opts= foo=
145
146 # Linux has /proc/mounts which should always exist
147 if [[ $(uname -s) == "Linux" ]] ; then
148 while read node point fs opts foo ; do
149 echo "${point} ${node} ${fs} ${opts}"
150 done < /proc/mounts
151 return
152 fi
153
154 # OK, pray we have a -p option that outputs mounts in fstab format
155 # using tabs as the seperator.
156 # Then pray that there are no tabs in the either.
157 # Currently only FreeBSD supports this and the other BSDs will
158 # have to be patched.
159 # Athough the BSD's may support /proc, they do NOT put \040 in place
160 # of the spaces and we should not force a /proc either.
161 local IFS=$'\t'
162 LC_ALL=C mount -p | while read node point fs foo ; do
163 opts=${fs#* }
164 fs=${fs%% *}
165 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
166 done
167}
168

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