/[gentoo-x86]/eclass/portability.eclass
Gentoo

Diff of /eclass/portability.eclass

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

Revision 1.2 Revision 1.17
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 1.2 2005/09/20 13:13:42 flameeyes Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.17 2010/09/24 14:29:49 vapier 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 31 # First try `seq`
32 p=$(type -P seq) 32 local p=$(type -P seq)
33 if [[ -n ${p} ]] ; then
34 "${p}" "$@"
35 return $?
36 fi
33 37
34 case $# in 38 case $# in
35 1) 39 1) min=1 max=$1 step=1 ;;
36 min=1 40 2) min=$1 max=$2 step=1 ;;
37 max=$1 41 3) min=$1 max=$3 step=$2 ;;
38 step=1 42 *) 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=$2
49 ;;
50 *)
51 die "seq called with wrong parameters number"
52 esac 43 esac
53 44
45 # Then try `jot`
46 p=$(type -P jot)
54 if [[ -z "${p}" ]]; then 47 if [[ -n ${p} ]] ; then
55 local reps 48 local reps
56 # BSD userland 49 # BSD userland
57 if [[ ${step} != 0 ]]; then 50 if [[ ${step} != 0 ]] ; then
58 reps=$(( ($max-$min) / $step +1 )) 51 reps=$(( (max - min) / step + 1 ))
59 else 52 else
60 reps=0 53 reps=0
61 fi 54 fi
62 55
63 jot $reps $min $max $step 56 jot $reps $min $max $step
64 else 57 return $?
65 "${p}" $min $step $max
66 fi 58 fi
59
60 # Screw it, do the output ourselves
61 while :; do
62 [[ $max < $min && $step > 0 ]] && break
63 [[ $min < $max && $step < 0 ]] && break
64 echo $min
65 : $(( min += step ))
66 done
67 return 0
67} 68}
68 69
69# Gets the linker flag to link to dlopen() function 70# Gets the linker flag to link to dlopen() function
70dlopen_lib() { 71dlopen_lib() {
71 if [[ ${ELIBC} != *BSD ]]; then 72 # - Solaris needs nothing
73 # - Darwin needs nothing
74 # - *BSD needs nothing
75 # - Linux needs -ldl (glibc and uclibc)
76 # - Interix needs -ldl
77 case "${CHOST}" in
78 *-linux-gnu*|*-linux-uclibc|*-interix*)
72 echo "-ldl" 79 echo "-ldl"
73 fi 80 ;;
81 esac
74} 82}
75 83
76# Gets the home directory for the specified user 84# Gets the home directory for the specified user
77# it's a wrap around egetent as the position of the home directory in the line 85# it's a wrap around egetent as the position of the home directory in the line
78# varies depending on the os used. 86# varies depending on the os used.
79# 87#
80# To use that, inherit eutils, not portability! 88# To use that, inherit eutils, not portability!
81egethome() { 89egethome() {
82 ent=$(egetent passwd $1) 90 ent=$(egetent passwd $1)
83 91
84 if [[ "${USERLAND}" == "Darwin" || "${ELIBC}" == "FreeBSD" ]]; then 92 case ${CHOST} in
93 *-darwin*|*-freebsd*|*-dragonfly*)
85 # Darwin/OSX and FreeBSD uses position 9 to store the home dir 94 # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
86 cut -d: -f9 <<<${ent} 95 echo ${ent} | cut -d: -f9
96 ;;
97 *)
98 # Linux, NetBSD and OpenBSD use position 6 instead
99 echo ${ent} | cut -d: -f6
100 ;;
101 esac
102}
103
104# Gets the shell for the specified user
105# it's a wrap around egetent as the position of the home directory in the line
106# varies depending on the os used.
107#
108# To use that, inherit eutils, not portability!
109egetshell() {
110 ent=$(egetent passwd "$1")
111
112 case ${CHOST} in
113 *-darwin*|*-freebsd*|*-dragonfly*)
114 # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
115 echo ${ent} | cut -d: -f10
116 ;;
117 *)
118 # Linux, NetBSD and OpenBSD use position 6 instead
119 echo ${ent} cut -d: -f7
120 ;;
121 esac
122}
123
124# Returns true if specified user has a shell that precludes logins
125# on whichever operating system.
126is-login-disabled() {
127 shell=$(egetshell "$1")
128
129 case ${shell} in
130 /bin/false|/usr/bin/false|/sbin/nologin|/usr/sbin/nologin)
131 return 0 ;;
132 *)
133 return 1 ;;
134 esac
135}
136
137# Gets the name of the BSD-ish make command (pmake from NetBSD)
138#
139# This will return make (provided by system packages) for BSD userlands,
140# or bsdmake for Darwin userlands and pmake for the rest of userlands,
141# both of which are provided by sys-devel/pmake package.
142#
143# Note: the bsdmake for Darwin userland is with compatibility with MacOSX
144# default name.
145get_bmake() {
146 if [[ ${USERLAND} == *BSD ]]; then
147 echo make
148 elif [[ ${USERLAND} == "Darwin" ]]; then
149 echo bsdmake
87 else 150 else
88 # Linux and NetBSD uses position 6 instead 151 echo pmake
89 cut -d: -f6 <<<${ent}
90 fi 152 fi
91} 153}
154
155# Portable method of getting mount names and points.
156# Returns as "point node fs options"
157# Remember to convert 040 back to a space.
158get_mounts() {
159 local point= node= fs= opts= foo=
160
161 # Linux has /proc/mounts which should always exist
162 if [[ $(uname -s) == "Linux" ]] ; then
163 while read node point fs opts foo ; do
164 echo "${point} ${node} ${fs} ${opts}"
165 done < /proc/mounts
166 return
167 fi
168
169 # OK, pray we have a -p option that outputs mounts in fstab format
170 # using tabs as the seperator.
171 # Then pray that there are no tabs in the either.
172 # Currently only FreeBSD supports this and the other BSDs will
173 # have to be patched.
174 # Athough the BSD's may support /proc, they do NOT put \040 in place
175 # of the spaces and we should not force a /proc either.
176 local IFS=$'\t'
177 LC_ALL=C mount -p | while read node point fs foo ; do
178 opts=${fs#* }
179 fs=${fs%% *}
180 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
181 done
182}
183

Legend:
Removed from v.1.2  
changed lines
  Added in v.1.17

  ViewVC Help
Powered by ViewVC 1.1.20