/[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 1.12 2009/03/22 11:26:45 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 # this might need a proper case statement, so far this seems to work as is
58 # - Solaris needs nothing
59 # - Darwin needs nothing
60 # - *BSD needs nothing
61 # - Linux needs -ldl
62 if [[ ${CHOST} == *-linux-gnu ]]; then
72 echo "-ldl" 63 echo "-ldl"
73 fi 64 fi
74} 65}
75 66
67# Gets the home directory for the specified user
68# it's a wrap around egetent as the position of the home directory in the line
69# varies depending on the os used.
70#
71# To use that, inherit eutils, not portability!
72egethome() {
73 ent=$(egetent passwd $1)
74
75 case ${CHOST} in
76 *-darwin*|*-freebsd*|*-dragonfly*)
77 # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
78 echo ${ent} | cut -d: -f9
79 ;;
80 *)
81 # Linux, NetBSD and OpenBSD use position 6 instead
82 echo ${ent} | cut -d: -f6
83 ;;
84 esac
85}
86
87# Gets the shell for the specified user
88# it's a wrap around egetent as the position of the home directory in the line
89# varies depending on the os used.
90#
91# To use that, inherit eutils, not portability!
92egetshell() {
93 ent=$(egetent passwd "$1")
94
95 case ${CHOST} in
96 *-darwin*|*-freebsd*|*-dragonfly*)
97 # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
98 echo ${ent} | cut -d: -f10
99 ;;
100 *)
101 # Linux, NetBSD and OpenBSD use position 6 instead
102 echo ${ent} cut -d: -f7
103 ;;
104 esac
105}
106
107# Returns true if specified user has a shell that precludes logins
108# on whichever operating system.
109is-login-disabled() {
110 shell=$(egetshell "$1")
111
112 case ${shell} in
113 /bin/false|/usr/bin/false|/sbin/nologin|/usr/sbin/nologin)
114 return 0 ;;
115 *)
116 return 1 ;;
117 esac
118}
119
120# Gets the name of the BSD-ish make command (pmake from NetBSD)
121#
122# This will return make (provided by system packages) for BSD userlands,
123# or bsdmake for Darwin userlands and pmake for the rest of userlands,
124# both of which are provided by sys-devel/pmake package.
125#
126# Note: the bsdmake for Darwin userland is with compatibility with MacOSX
127# default name.
128get_bmake() {
129 if [[ ${USERLAND} == *BSD ]]; then
130 echo make
131 elif [[ ${USERLAND} == "Darwin" ]]; then
132 echo bsdmake
133 else
134 echo pmake
135 fi
136}
137
138# Portable method of getting mount names and points.
139# Returns as "point node fs options"
140# Remember to convert 040 back to a space.
141get_mounts() {
142 local point= node= fs= opts= foo=
143
144 # Linux has /proc/mounts which should always exist
145 if [[ $(uname -s) == "Linux" ]] ; then
146 while read node point fs opts foo ; do
147 echo "${point} ${node} ${fs} ${opts}"
148 done < /proc/mounts
149 return
150 fi
151
152 # OK, pray we have a -p option that outputs mounts in fstab format
153 # using tabs as the seperator.
154 # Then pray that there are no tabs in the either.
155 # Currently only FreeBSD supports this and the other BSDs will
156 # have to be patched.
157 # Athough the BSD's may support /proc, they do NOT put \040 in place
158 # of the spaces and we should not force a /proc either.
159 local IFS=$'\t'
160 LC_ALL=C mount -p | while read node point fs foo ; do
161 opts=${fs#* }
162 fs=${fs%% *}
163 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
164 done
165}
166

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