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Revision 1.17 - (show annotations) (download)
Fri Sep 24 14:29:49 2010 UTC (4 years, 3 months ago) by vapier
Branch: MAIN
Changes since 1.16: +2 -2 lines
seq: fix debug typo pointed out by Torsten

1 # Copyright 1999-2005 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.16 2010/09/24 02:22:08 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 # treecopy orig1 orig2 orig3 .... dest
12 #
13 # mimic cp --parents copy, but working on BSD userland as well
14 treecopy() {
15 dest=${!#}
16 files_count=$#
17
18 while(( $# > 1 )); do
19 dirstruct=$(dirname "$1")
20 mkdir -p "${dest}/${dirstruct}"
21 cp -pPR "$1" "${dest}/${dirstruct}"
22
23 shift
24 done
25 }
26
27 # seq min max
28 #
29 # compatibility function that mimes seq command if not available
30 seq() {
31 # First try `seq`
32 local p=$(type -P seq)
33 if [[ -n ${p} ]] ; then
34 "${p}" "$@"
35 return $?
36 fi
37
38 case $# in
39 1) min=1 max=$1 step=1 ;;
40 2) min=$1 max=$2 step=1 ;;
41 3) min=$1 max=$3 step=$2 ;;
42 *) die "seq called with wrong number of arguments" ;;
43 esac
44
45 # Then try `jot`
46 p=$(type -P jot)
47 if [[ -n ${p} ]] ; then
48 local reps
49 # BSD userland
50 if [[ ${step} != 0 ]] ; then
51 reps=$(( (max - min) / step + 1 ))
52 else
53 reps=0
54 fi
55
56 jot $reps $min $max $step
57 return $?
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 : $(( min += step ))
66 done
67 return 0
68 }
69
70 # Gets the linker flag to link to dlopen() function
71 dlopen_lib() {
72 # - Solaris needs nothing
73 # - Darwin needs nothing
74 # - *BSD needs nothing
75 # - Linux needs -ldl (glibc and uclibc)
76 # - Interix needs -ldl
77 case "${CHOST}" in
78 *-linux-gnu*|*-linux-uclibc|*-interix*)
79 echo "-ldl"
80 ;;
81 esac
82 }
83
84 # Gets the home directory for the specified user
85 # it's a wrap around egetent as the position of the home directory in the line
86 # varies depending on the os used.
87 #
88 # To use that, inherit eutils, not portability!
89 egethome() {
90 ent=$(egetent passwd $1)
91
92 case ${CHOST} in
93 *-darwin*|*-freebsd*|*-dragonfly*)
94 # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
95 echo ${ent} | cut -d: -f9
96 ;;
97 *)
98 # Linux, NetBSD and OpenBSD use position 6 instead
99 echo ${ent} | cut -d: -f6
100 ;;
101 esac
102 }
103
104 # Gets the shell for the specified user
105 # it's a wrap around egetent as the position of the home directory in the line
106 # varies depending on the os used.
107 #
108 # To use that, inherit eutils, not portability!
109 egetshell() {
110 ent=$(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 ${ent} cut -d: -f7
120 ;;
121 esac
122 }
123
124 # Returns true if specified user has a shell that precludes logins
125 # on whichever operating system.
126 is-login-disabled() {
127 shell=$(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.
145 get_bmake() {
146 if [[ ${USERLAND} == *BSD ]]; then
147 echo make
148 elif [[ ${USERLAND} == "Darwin" ]]; then
149 echo bsdmake
150 else
151 echo pmake
152 fi
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.
158 get_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 }

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