SImple Linux kernel boot args (/proc/cmdline) parser
Posted by Anonymous on Tue 10th May 2022 14:58
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#!/bin/ksh93

#
# simple /proc/cmdline parser
#

compound c
typeset -a ar
typeset s
typeset dummy

ar=( $(cat /proc/cmdline) )

compound -A c.values

for s in "${ar[@]}" ; do
        dummy=${s/~(Elr)(.+?)(?:=(.+)|)/}
        print -v .sh.match

        case "${#.sh.match[*]}" in
                '2')
                        c.values[${.sh.match[1]}].name="${.sh.match[1]}"
                        ;;
                '3')
                        c.values[${.sh.match[1]}].name="${.sh.match[1]}"
                        c.values[${.sh.match[1]}].value="${.sh.match[2]}"
                        ;;
                *)
                        print -u2 -f $"%s: Parser error\n" "$0"
                        ;;
        esac
done

print -v c

# EOF.