xref: /openbmc/openbmc/poky/scripts/postinst-intercepts/postinst_intercept (revision c124f4f2e04dca16a428a76c89677328bc7bf908)
1*#!/bin/sh
2*#
3*# SPDX-License-Identifier: MIT
4*#
5*# This script is called from inside postinstall scriptlets at do_rootfs time. It
6*# actually adds, at the end, the list of packages for which the intercept script
7*# is valid. Also, if one wants to pass any variables to the intercept script from
8*# the postinstall itself, they will be added immediately after the shebang line.
9*#
10*# Usage: postinst_intercept <intercept_script_name> <package_name> <mlprefix=...> <var1=...> ... <varN=...>
11*#  * intercept_script_name - the name of the intercept script we want to change;
12*#  * package_name - add the package_name to list of packages the intercept script
13*#                   is used for;
14*#  * mlprefix=... - this one is needed in order to have separate hooks for multilib.
15*#  * var1=... - var1 will have the value we provide in the intercept script. This
16*#               is useful when we want to pass on variables like ${libdir} to
17*#               the intercept script;
18*#
19*[ $# -lt 3 ] && exit 1
20*
21*intercept_script=$INTERCEPT_DIR/$1 && shift
22*package_name=$1 && shift
23*mlprefix=$(echo $1 |sed -ne "s/^mlprefix=\(.*\)-/\1/p") && shift
24*
25*# if the hook we want to install does not exist, then there's nothing we can do
26*[ -f "$intercept_script" ] || exit 1
27*
28*# if the postinstall wanting to install the hook belongs to a multilib package,
29*# then we'd better have a separate hook for this because the default ${libdir} and
30*# ${base_libdir} will point to the wrong locations
31*if [ -n "$mlprefix" ]; then
32*	ml_intercept_script=$intercept_script-$mlprefix
33*	# if the multilib hook does not exist, create it from the default one
34*	if [ ! -f "$ml_intercept_script" ]; then
35*		cp $intercept_script $ml_intercept_script
36*
37*		# clear the ##PKGS: line and the already set variables
38*		[ -x "$ml_intercept_script" ] && sed -i -e "2,$(($#+1)) {/.*/d}" -e "/^##PKGS: .*/d" $ml_intercept_script
39*	fi
40*
41*	intercept_script=$ml_intercept_script
42*fi
43*
44*chmod +x "$intercept_script"
45*
46*pkgs_line=$(grep "##PKGS:" $intercept_script)
47*if [ -n "$pkgs_line" ]; then
48*	# line exists, add this package to the list only if it's not already there
49*	if [ -z "$(echo "$pkgs_line" | grep " $package_name ")" ]; then
50*		sed -i -e "s/##PKGS:.*/\0${package_name} /" $intercept_script
51*	fi
52*else
53*	for var in "$@"; do
54*		sed -i -e "\%^#\!/bin/.*sh%a $var" $intercept_script
55*	done
56*	echo "##PKGS: ${package_name} " >> $intercept_script
57*fi
58*
59*