gentoo-x86/eclass/portability.eclass

# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/portability.eclass,v 1.6 2005/12/14 18:46:50 flameeyes Exp $
#
# Author: Diego Pettenò <flameeyes@gentoo.org>
#
# This eclass is created to avoid using non-portable GNUisms inside ebuilds
#
# NB:  If you add anything, please comment it!

# treecopy orig1 orig2 orig3 .... dest
#
# mimic cp --parents copy, but working on BSD userland as well
treecopy() {
        dest=${!#}
        files_count=$#

        while(( $# > 1 )); do
                dirstruct=$(dirname "$1")
                mkdir -p "${dest}/${dirstruct}"
                cp -pPR "$1" "${dest}/${dirstruct}"

                shift
        done
}

# seq min max
#
# compatibility function that mimes seq command if not available
seq() {
        local p=$(type -P seq)

        case $# in
                1) min=1  max=$1 step=1  ;;
                2) min=$1 max=$2 step=1  ;;
                3) min=$1 max=$3 step=$2 ;;
                *) die "seq called with wrong number of arguments" ;;
        esac

        if [[ -z ${p} ]] ; then
                local reps
                # BSD userland
                if [[ ${step} != 0 ]]; then
                        reps=$(( ($max-$min) / $step +1 ))
                else
                        reps=0
                fi

                jot $reps $min $max $step
        else
                "${p}" $min $step $max
        fi
}

# Gets the linker flag to link to dlopen() function
dlopen_lib() {
        if [[ ${ELIBC} != *BSD ]]; then
                echo "-ldl"
        fi
}

# Gets the home directory for the specified user
# it's a wrap around egetent as the position of the home directory in the line
# varies depending on the os used.
#
# To use that, inherit eutils, not portability!
egethome() {
        ent=$(egetent passwd $1)

        case ${CHOST} in
        *-darwin*|*-freebsd*|*-dragonfly*)
                # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
                cut -d: -f9 <<<${ent}
                ;;
        *)
                # Linux, NetBSD and OpenBSD use position 6 instead
                cut -d: -f6 <<<${ent}
                ;;
        esac
}

# Gets the shell for the specified user
# it's a wrap around egetent as the position of the home directory in the line
# varies depending on the os used.
#
# To use that, inherit eutils, not portability!
egetshell() {
        ent=$(egetent passwd "$1")

        case ${CHOST} in
        *-darwin*|*-freebsd*|*-dragonfly*)
                # Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
                cut -d: -f10 <<<${ent}
                ;;
        *)
                # Linux, NetBSD and OpenBSD use position 6 instead
                cut -d: -f7 <<<${ent}
                ;;
        esac
}

# Returns true if specified user has a shell that precludes logins
# on whichever operating system.
is-login-disabled() {
        shell=$(egetshell "$1")

        case ${shell} in
                /bin/false|/usr/bin/false|/sbin/nologin|/usr/sbin/nologin)
                        return 0 ;;
                *)
                        return 1 ;;
        esac
}

# Gets the name of the BSD-ish make command (pmake from NetBSD)
#
# This will return make (provided by system packages) for BSD userlands,
# or bsdmake for Darwin userlands and pmake for the rest of userlands,
# both of which are provided by sys-devel/pmake package.
#
# Note: the bsdmake for Darwin userland is with compatibility with MacOSX
# default name.
get_bmake() {
        if [[ ${USERLAND} == *BSD ]]; then
                echo make
        elif [[ ${USERLAND} == "Darwin" ]]; then
                echo bsdmake
        else
                echo pmake
        fi
}
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 1.6 2005/12/14 18:46:50 flameeyes 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 ${CHOST} in
71	-darwin\|-freebsd\|-dragonfly)
72	# Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
73	cut -d: -f9 <<<${ent}
74	;;
75	*)
76	# Linux, NetBSD and OpenBSD use position 6 instead
77	cut -d: -f6 <<<${ent}
78	;;
79	esac
80	}
81
82	# Gets the shell for the specified user
83	# it's a wrap around egetent as the position of the home directory in the line
84	# varies depending on the os used.
85	#
86	# To use that, inherit eutils, not portability!
87	egetshell() {
88	ent=$(egetent passwd "$1")
89
90	case ${CHOST} in
91	-darwin\|-freebsd\|-dragonfly)
92	# Darwin, OSX, FreeBSD and DragonFly use position 9 to store homedir
93	cut -d: -f10 <<<${ent}
94	;;
95	*)
96	# Linux, NetBSD and OpenBSD use position 6 instead
97	cut -d: -f7 <<<${ent}
98	;;
99	esac
100	}
101
102	# Returns true if specified user has a shell that precludes logins
103	# on whichever operating system.
104	is-login-disabled() {
105	shell=$(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	}