libopkbuild: Abort on invalid function arguments

Shift arguments and abort instead of returning 125.

Incorrect numbers of function arguments suggest application/library
incompatibilities or serious errors by the application developer.
Either way, the application developer should be made immediately aware
of this (and not allowed to simply not check return values), and
continuing to run and handle any further API calls may be unsafe.

1 files changed, 8 insertions, 15 deletions

diff --git a/lib/package/2.sh b/lib/package/2.sh
index 551f199..3e362f4 100644
--- a/lib/package/2.sh
+++ b/lib/package/2.sh
@@ -70,7 +70,7 @@ _ob_srcfield_2()
 	local name="${1}"
 	local value="${2}"
 	local user_data="${3}"
-	shift 3
+	shift 3 || _ob_abort
 
 	_ob_set_source_parameter "${name}" "${value}"
 
@@ -95,7 +95,7 @@ _ob_binfield_2()
 	local name="${1}"
 	local value="${2}"
 	local pkg="${3}"
-	shift 3
+	shift 3 || _ob_abort
 
 	_ob_set_binary_parameter "${pkg}" "${name}" "${value}"
 
@@ -127,13 +127,11 @@ _ob_get_doc_package_2()
 
 _ob_get_doc_files_2()
 {
-	local arch=
-	local plat=
+	local arch="${1}"
+	local plat="${2}"
+	shift 2 || _ob_abort
 	local doc_pkg=
 
-	arch="${1}"
-	plat="${2}"
-
 	doc_pkg="$(_ob_get_doc_package_2)"
 
 	cat <<-EOF
@@ -148,13 +146,8 @@ _ob_get_doc_files_2()
 
 _ob_set_package_substvars_2()
 {
-	local pkg=
-
-	if [ ${#} -eq 1 ]; then
-		pkg="${1}"
-	else
-		return 125
-	fi
+	local pkg="${1}"
+	shift 1 || _ob_abort
 
 	if [ -f "${_OB_PACKAGE_DIR}/substvars" ]; then
 		ob_parse_control "${_OB_PACKAGE_DIR}/substvars" \
@@ -174,7 +167,7 @@ _ob_substvar_2()
 	local name="${1}"
 	local value="${2}"
 	local user_data="${3}"
-	shift 3
+	shift 3 || _ob_abort
 
 	ob_set_substvar "${name}" "${value}"