package-update/base/sysfiles/parse-config

# --- SDE-COPYRIGHT-NOTE-BEGIN ---
# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
#
# Filename: package/.../sysfiles/parse-config
# Copyright (C) 2004 - 2006 The T2 SDE Project
# Copyright (C) 1998 - 2003 Clifford Wolf
#
# More information can be found in the files COPYING and README.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License. A copy of the
# GNU General Public License can be found in the file COPYING.
# --- SDE-COPYRIGHT-NOTE-END ---

# We need to store some bookkeeping for later runs. With this
# information better error messages are possible, but most
# importantly it allows packages to be updated (with possibly
# different mimetypes).
parse_config_data=$root/usr/share/rock-registry/parse-config

if [ "$pkg" != "sysfiles" ]; then
	var_append flistdel "|" "etc/mtab"
fi

if atstage native && [ -f $confdir/postsysfiles.in ] ; then
	var_append flistdel "|" "etc/passwd"
	var_append flistdel "|" "etc/shadow"
	var_append flistdel "|" "etc/gshadow"
	var_append flistdel "|" "etc/mime.types"
	var_append flistdel "|" "etc/mailcap"
	var_append flistdel "|" "usr/share/rock-registry/parse-config.*"
	hook_add preconf 2 ". $confdir/postsysfiles.in"
fi

# Usage: safe_useradd name uid gid desc homedir shell pass
#
#	uid and name must be registered in
#	Documentation/Developers/REGISTER
#
#	pass is already encrypted and might be one of:
#	"*" ... system account, wont ever have a password
#	"!" ... real user, admin needs to define a password later
#
safe_useradd() {
	if grep -q "^$1:" $root/etc/passwd; then
		echo "Found already existing user '$1'."
	else
		if grep -q ":$2:" $root/etc/passwd; then
			echo "UID $2 exists"
			exit -1
		fi

		echo "Creating user '$1' ..."
		echo "$1:x:$2:$3:$4:$5:$6" >> $root/etc/passwd
		echo "$1:$7:::::::" >> $root/etc/shadow
	fi
}

# Usage: safe_groupadd name id
#
#	gid and name must be registered in
#	Documentation/Developers/REGISTER
#
safe_groupadd() {
	if grep -q "^$1:" $root/etc/group; then
		echo "Found already existing group '$1'."
	else
		if grep -q ":$2:" $root/etc/passwd; then
			echo "GID $2 exists"
			exit -1
		fi

		echo "Creating group '$1' ..."
		echo "$1:x:$2:" >> $root/etc/group
	fi
}

# Usage: safe_mimetypeadd mimetype exts cmd
#
#	mimetype is the type to be registered
#	exts is one of more extension to be tied to the mimetype.
#	cmd the command to be tied to the mimetype
#
# Bookkeeping files:
# -----------------
# mimetypes: <mimetype> <package>
# extensions: <extension> <mimetype>
#
# Configuration files:  (simplified)
# -------------------
# /etc/mime.types <mimetype> <extensions>
# /etc/mailcap <mimetype>; <command>
#
safe_mimetypeadd() {
	# Get the arguments.
	local mimetype=$1
	local extensions=$2
	local command=$3

	# If bookkeeping dir does not exist, create it.
	mkdir -p $parse_config_data

	# Check if the mimetype has been registered before.
	local add_allowed=yes;		# until we know better.
	if grep -q "^$mimetype" $root/etc/mime.types; then
		# The mime type has already been registered. Determine
		# what package registered the mimetype.
		local package=$(grep "^$mimetype" $parse_config_data/mimetypes | cut -d' ' -f2)

		# Is it the current package, in other words is the
		# package being updated?
		if [ "$package" == "$pkg" ] ; then
			# Apparently the package needs to be updated. To
			# smoothen this process we remove any current mimetype
			# information for the package.
			remove_mimetype $mimetype
		else
			# Some other package has registered the mimetype.
			# Since we practise first come first served, we are
			# not allowed to change it.
			echo "Mime type '$mimetype' already registered by $package"
			add_allowed=no
		fi
		unset package
	fi

	# Are we allowed to add the mimetype.
	if [ "$add_allowed" == "yes" ] ; then
		# Before doing all necessary mimetype binding, we first have
		# to check if the requested extensions are still free.
		free_extensions=
		local mt=
		# Loop though all extensions and try to bind them to the
		# given mimetype. However, first check if the extension
		# is already bound to another mimetype.
		for extension in $extensions; do
			mt=$(grep "^$extention" $parse_config_data/extensions | cut -d' ' -f2)
			if [ -n "$mt" ] ; then
				# The extension is already bound to another
				# mimetype.
				echo "Extension '$extension' already bound to $mt"
			else
				# Add this extensions to the list.
				var_append free_extensions " " "$extension"

				# Register this binding in our bookkeeping.
				echo "$extension $mimetype" >> $parse_config_data/extensions
			fi
		done
		# Bind all remaining extensions to the mimetype
		echo "Adding mime type '$mimetype' ..."
		echo "$mimetype $free_extensions" >> $root/etc/mime.types
		unset free_extensions
		unset extension

		# Now the mimetype is set we can set the mailcap as well.
		echo "$mimetype; $command" >> $root/etc/mailcap

		# Also do the necessary bookkeeping.
		echo "$mimetype $pkg" >> $parse_config_data/mimetypes
	fi
}

# Usage: remove_mimetype <mimetype>
#
#	safely removes the given mimetype from both mimetype and mailcap
#	configuration files. Also the proprietary T2 information regarding
#	mimetypes is updated.
#
#	<mimetype> The mimetype to be removed.
#
remove_mimetype() {
	local mimetype=$1
	mimetype=${mimetype//\//\\/}

	# Remove the mimetype from /etc/mime.types
	sed -i "/^$mimetype .*\$/d" $root/etc/mime.types

	# Remove the mimetype from /etc/mailcap
	# TODO: mailcap entries can be multiline.
	sed -i "/^$mimetype; .*\$/d" $root/etc/mailcap

	# Remove the mimetype from .../mimetypes
	sed -i "/^$mimetype .*\$/d" $parse_config_data/mimetypes

	# Remove the extensions binding to the given mimetype.
	sed -i "/^.* $mimetype\$/d" $parse_config_data/extensions
}