[src/trunk]: src/usr.sbin/sysinst 1. Rework the IFS handling when checking co...

[cjep <cjep%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b393a788287c
branches:  trunk
changeset: 1021991:b393a788287c
user:      cjep <cjep%NetBSD.org@localhost>
date:      Tue Jun 29 08:02:50 2021 +0000

description:
1. Rework the IFS handling when checking consistency of formatting in
sysinst messages. Closes PR toolchain/56181.
2. Whilst here, change some shell clauses to be more portable.

Patch developed by kre. Also reviewed by martin. Cross-builds tested
on NetBSD, OpenBSD, FreeBSD and Darwin.

diffstat:

 usr.sbin/sysinst/msg_xlat.sh |  130 +++++++++++++++++++++++-------------------
 1 files changed, 70 insertions(+), 60 deletions(-)

diffs (241 lines):

diff -r 9dd1c218faf1 -r b393a788287c usr.sbin/sysinst/msg_xlat.sh
--- a/usr.sbin/sysinst/msg_xlat.sh      Tue Jun 29 07:37:34 2021 +0000
+++ b/usr.sbin/sysinst/msg_xlat.sh      Tue Jun 29 08:02:50 2021 +0000
@@ -1,5 +1,5 @@
 #! /bin/sh
-#      $NetBSD: msg_xlat.sh,v 1.2 2020/11/05 19:13:21 christos Exp $
+#      $NetBSD: msg_xlat.sh,v 1.3 2021/06/29 08:02:50 cjep Exp $
 
 #-
 # Copyright (c) 2003 The NetBSD Foundation, Inc.
@@ -37,32 +37,35 @@
        exit 1
 }
 
-error() {
+error()
+{
        echo "$PROG: ERROR $@" >&2
 }
 
-count_fmtargs=
+IGNORE_MISSING_TRANSLATIONS=false
+count_fmtargs=false
 msg_defs=msg_defs.h
+
 while getopts cd:f:i f
 do
-       case $f in
-       c) count_fmtargs=1;;
+       case "$f" in
+       c) count_fmtargs=true;;
        d) msg_defs=$OPTARG;;
        f) fmt_count=$OPTARG;;
-       i) IGNORE_MISSING_TRANSLATIONS=y;;
+       i) IGNORE_MISSING_TRANSLATIONS=true;;
        *) usage;;
        esac
 done
 shift $(($OPTIND - 1))
-[ "$#" = 0 ] || usage
+if [ "$#" -ne 0 ]; then usage; fi
 
-nl="
-"
-msg_long="((msg)(long)"
-close_paren=")"
-open_brace="{"
-close_brace="}"
-slash="/"
+nl='
+'
+msg_long='((msg)(long)'
+close_paren=')'
+open_brace='{'
+close_brace='}'
+slash=/
 
 rval=0
 
@@ -70,13 +73,13 @@
 exec 3<&0
 
 # Read existing list of format arg counts
-[ -n "$fmt_count" ] && {
+if [ -n "$fmt_count" ]; then
        exec <$fmt_count || exit 2
        while read name count
        do
                eval count_$name=\$count
        done
-}
+fi
 
 # Read header file and set up map of message names to numbers
 
@@ -84,12 +87,14 @@
 
 while read define MSG_name number rest
 do
-       [ -z "$number" -o -n "$rest" ] && continue
-       [ "$define" = "#define" ] || continue
+       if [ -z "$number" ] || [ -n "$rest" ]; then continue; fi
+       if [ "$define" != "#define" ]; then continue; fi
+
        name="${MSG_name#MSG_}"
-       [ "$name" = "${MSG_name}" ] && continue
+       if [ "$name" = "${MSG_name}" ]; then continue; fi
+
        msg_number="${number#$msg_long}"
-       [ "$msg_number" = "$number" ] && continue
+       if [ "$msg_number" = "$number" ]; then continue; fi
        msg_number="${msg_number%$close_paren}"
 
        eval $MSG_name=$msg_number
@@ -105,101 +110,106 @@
 
 name=
 msg=
-OIFS="$IFS"
 while
        IFS=
        read -r line
 do
-       [ -z "$name" ] && {
+       if [ -z "$name" ]; then
                IFS="   "
                set -- $line
-               [ "$1" = message ] || continue
+               if [ "$1" != message ]; then continue; fi
                name="$2"
                eval number=\$MSG_$name
-               [ -z "$number" ] && {
+               if [ -z "$number" ]; then
                        error "unknown message \"$name\""
-                       [ -n "$IGNORE_MISSING_TRANSLATIONS" ] || rval=1
+                       $IGNORE_MISSING_TRANSLATIONS || rval=1
                        number=unknown
-               }
+               fi
                l=${line#*$open_brace}
-               [ "$l" = "$line" ] && continue
+               if [ "$l" = "$line" ]; then continue; fi
                line="{$l"
-       }
-       [ -z "$msg" ] && {
-               l="${line#$open_brace}"
-               [ "$l" = "$line" ] && continue
+       fi
+       if [ -z "$msg" ]; then
+               l=${line#$open_brace}
+               if [ "$l" = "$line" ]; then continue; fi
                msg="$line"
-       } || msg="$msg$nl$line"
-       m="${msg%$close_brace}"
-       [ "$m" = "$msg" ] && {
+       else
+               msg="$msg$nl$line"
+       fi
+       m=${msg%$close_brace}
+       if [ "$m" = "$msg" ]; then
                # Allow <tab>*/* comment */ (eg XXX translate)
-               m="${msg%%$close_brace*$slash[*]*[*]$slash}"
-               [ "$m" = "$msg" ] &&
-                       continue
-       }
+               m=${msg%%$close_brace*$slash[*]*[*]$slash}
+               if [ "$m" = "$msg" ]; then continue; fi
+       fi
        # We need the %b to expand the \n that exist in the message file
-       msg="$(printf "%bz" "${m#$open_brace}")"
-       msg="${msg%z}"
+       msg=$(printf %bz "${m#$open_brace}")
+       msg=${msg%z}
        eval old=\"\$MSGTEXT_$number\"
-       [ -n "$old" -a "$number" != unknown ] && {
+       if [ -n "$old" ] &&  [ "$number" != unknown ]; then
                error "Two translations for message \"$name\""
-               [ -n "$IGNORE_MISSING_TRANSLATIONS" ] || rval=1
-       }
+               $IGNORE_MISSING_TRANSLATIONS || rval=1
+       fi
        eval MSGTEXT_$number=\"\${msg}\"
        # echo $number $msg
        sv_name="$name"
        sv_msg="$msg"
        name=
        msg=
-       [ -z "$count_fmtargs" -a -z "$fmt_count" ] && continue
+       if ! $count_fmtargs && [ -z "$fmt_count" ]; then continue; fi
+
+       IFS=%
+       set -- $sv_msg
 
-       IFS='%'
-       set -- - x$sv_msg
-       [ -n "$count_fmtargs" ] && {
+       # For our purposes, empty messages are the same as words without %
+       if [ $# -eq 0 ]; then set -- x; fi
+       
+       if $count_fmtargs; then
                echo $number $#
                continue
-       }
+       fi
        eval count=\${count_$number:-unknown}
-       [ "$count" = $# ] || {
+       if [ "$count" -ne $# ]; then
                error "Wrong number of format specifiers in \"$sv_name\", got $#, expected $count"
-               [ -n "$IGNORE_MISSING_TRANSLATIONS" ] || rval=1
-       }
+               $IGNORE_MISSING_TRANSLATIONS || rval=1
+       fi
 done
+unset IFS
 
-[ -n "$count_fmtargs" ] && exit $rval
+if $count_fmtargs; then exit $rval; fi
 
 # Output the total number of messages and the offset of each in the file.
 # Use ascii numbers because generating target-ordered binary numbers
 # is just a smidgen tricky in the shell.
 
-offset="$(( 8 + $last_msg_number * 8 + 8 ))"
+offset=$(( 8 + $last_msg_number * 8 + 8 ))
 printf 'MSGTXTS\0%-7d\0' $last_msg_number
 
 msgnum=0
 while
-       msgnum="$(( $msgnum + 1 ))"
+       msgnum=$(( $msgnum + 1 ))
        [ "$msgnum" -le "$last_msg_number" ]
 do
        eval msg=\${MSGTEXT_$msgnum}
-       [ -z "$msg" ] && {
+       if [ -z "$msg" ]; then
                eval error "No translation for message \$MSGNUM_$msgnum"
                printf '%-7d\0' 0
-               [ -n "$IGNORE_MISSING_TRANSLATIONS" ] || rval=1
+               $IGNORE_MISSING_TRANSLATIONS || rval=1
                continue
-       }
+       fi
        printf '%-7d\0' $offset
-       offset="$(( $offset + ${#msg} + 1 ))"
+       offset=$(( $offset + ${#msg} + 1 ))
 done
 
 # Finally output and null terminate the messages.
 
 msgnum=0
 while
-       msgnum="$(( $msgnum + 1 ))"
+       msgnum=$(( $msgnum + 1 ))
        [ "$msgnum" -le "$last_msg_number" ]
 do
        eval msg=\${MSGTEXT_$msgnum}
-       [ -z "$msg" ] && continue
+       if [ -z "$msg" ]; then continue; fi
        printf '%s\0' $msg
 done