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Revision 1.10 - (show annotations) (download)
Fri Nov 10 15:56:59 2006 UTC (7 years, 10 months ago) by uberlord
Branch: MAIN
Changes since 1.9: +8 -6 lines
get_mounts now returns mount options too

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 1.9 2006/11/06 13:55:04 uberlord 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}/${dirstruct}"
22
23 shift
24 done
25 }
26
27 # seq min max
28 #
29 # compatibility function that mimes seq command if not available
30 seq() {
31 local p=$(type -P seq)
32
33 case $# in
34 1) min=1 max=$1 step=1 ;;
35 2) min=$1 max=$2 step=1 ;;
36 3) min=$1 max=$3 step=$2 ;;
37 *) die "seq called with wrong number of arguments" ;;
38 esac
39
40 if [[ -z ${p} ]] ; then
41 local reps
42 # BSD userland
43 if [[ ${step} != 0 ]]; then
44 reps=$(( ($max-$min) / $step +1 ))
45 else
46 reps=0
47 fi
48
49 jot $reps $min $max $step
50 else
51 "${p}" $min $step $max
52 fi
53 }
54
55 # Gets the linker flag to link to dlopen() function
56 dlopen_lib() {
57 if [[ ${ELIBC} != *BSD ]]; then
58 echo "-ldl"
59 fi
60 }
61
62 # Gets the home directory for the specified user
63 # it's a wrap around egetent as the position of the home directory in the line
64 # varies depending on the os used.
65 #
66 # To use that, inherit eutils, not portability!
67 egethome() {
68 ent=$(egetent passwd $1)
69
70 case ${CHOST} in
71 *-darwin*|*-freebsd*|*-dragonfly*)
72 # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
73 echo ${ent} | cut -d: -f9
74 ;;
75 *)
76 # Linux, NetBSD and OpenBSD use position 6 instead
77 echo ${ent} | cut -d: -f6
78 ;;
79 esac
80 }
81
82 # Gets the shell for the specified user
83 # it's a wrap around egetent as the position of the home directory in the line
84 # varies depending on the os used.
85 #
86 # To use that, inherit eutils, not portability!
87 egetshell() {
88 ent=$(egetent passwd "$1")
89
90 case ${CHOST} in
91 *-darwin*|*-freebsd*|*-dragonfly*)
92 # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
93 echo ${ent} | cut -d: -f10
94 ;;
95 *)
96 # Linux, NetBSD and OpenBSD use position 6 instead
97 echo ${ent} cut -d: -f7
98 ;;
99 esac
100 }
101
102 # Returns true if specified user has a shell that precludes logins
103 # on whichever operating system.
104 is-login-disabled() {
105 shell=$(egetshell "$1")
106
107 case ${shell} in
108 /bin/false|/usr/bin/false|/sbin/nologin|/usr/sbin/nologin)
109 return 0 ;;
110 *)
111 return 1 ;;
112 esac
113 }
114
115 # Gets the name of the BSD-ish make command (pmake from NetBSD)
116 #
117 # This will return make (provided by system packages) for BSD userlands,
118 # or bsdmake for Darwin userlands and pmake for the rest of userlands,
119 # both of which are provided by sys-devel/pmake package.
120 #
121 # Note: the bsdmake for Darwin userland is with compatibility with MacOSX
122 # default name.
123 get_bmake() {
124 if [[ ${USERLAND} == *BSD ]]; then
125 echo make
126 elif [[ ${USERLAND} == "Darwin" ]]; then
127 echo bsdmake
128 else
129 echo pmake
130 fi
131 }
132
133 # Portable method of getting mount names and points.
134 # Returns as "point node fs options"
135 # Remember to convert 040 back to a space.
136 get_mounts() {
137 local point= node= fs= opts= foo=
138
139 # Linux has /proc/mounts which should always exist
140 if [[ $(uname -s) == "Linux" ]] ; then
141 while read node point fs opts foo ; do
142 echo "${point} ${node} ${fs} ${opts}"
143 done < /proc/mounts
144 return
145 fi
146
147 # OK, pray we have a -p option that outputs mounts in fstab format
148 # using tabs as the seperator.
149 # Then pray that there are no tabs in the either.
150 # Currently only FreeBSD supports this and the other BSDs will
151 # have to be patched.
152 # Athough the BSD's may support /proc, they do NOT put \040 in place
153 # of the spaces and we should not force a /proc either.
154 local IFS=$'\t'
155 LC_ALL=C mount -p | while read node point fs foo ; do
156 opts=${fs#* }
157 fs=${fs%% *}
158 echo "${point// /\040} ${node// /\040} ${fs%% *} ${opts// /\040}"
159 done
160 }

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