Re: Bug#383321: su-to-root => localisation ;-)

[Bill Allombert <Bill.Allombert@math.u-bordeaux1.fr>]

On Sun, Aug 20, 2006 at 08:28:26AM -0500, Christian Perrier wrote:
> >   GT5=$(gettext 'Incorrect password or command failed. Try again?')
> >   echo -n "${GT5} (${ANS})"
> >   read ans
> >   if   [ ${FLAG} -eq 0 ] ; then
> >     if test "${ans}" != "y" -a "${ans}" != "Y"; then exit 1 ; fi
> >   elif [ ${FLAG} -eq 1 ] ; then
> >     if test "${ans}" != "j" -a "${ans}" != "J"; then exit 1 ; fi
> >   elif [ ${FLAG} -eq 2 ] ; then
> >     if test "${ans}" != "o" -a "${ans}" != "N"; then exit 1 ; fi
> >   fi
> > }
> 
> I'm not sure how to do it in shell programming, but this anyway
> doesn't scale very well to other languages. The locale information
> should be used here (the Yes/No shortcuts are part of locale
> files....I'm however not aware of the exact way to use them).

I have rewritten su-to-root to be more l10n-friendly by removing text
duplication and using printf.

I need two advices from the l10n experts:
1) the best way to check if gettext is available.
2) the best way to deal with the yes/no prompting above.

Is there good examples of l10n scripts in Debian?

I have attached the current, mostly untested, version.

Cheers,
-- 
Bill. <ballombe@debian.org>

Imagine a large red swirl here. 

#!/bin/bash

if test -r ~/.su-to-rootrc; then
. ~/.su-to-rootrc
fi

PRIV=root
COMMAND=
NEEDS=text

gettext=$(which gettext 2>/dev/null)

transf() {
  txt="$1";
  shift;
  if [ -n "$gettext" ]; then 
    txt="$(gettext su-to-root "$txt")";
  fi
  printf "$txt" "$@"
}

eshell() {
   getent passwd $1 | cut -f7 -d:
}

usage () {
  transf 'usage: %s [-X] [-p <user>] -c <command>
  -c command: command to execute
  -p <user>: user to switch to (default: root)
  -X: command is a X11 program\n' $0 >&2
  exit 1
}

for i in "$@"; do
   case "$prev" in
     -p)
       PRIV="$i";;
     -c)
       COMMAND="$i";;
     -X) 
       NEEDS="X11";;
   esac
   prev="$i"
done

if [ -z "$COMMAND" ] ; then
   usage;
fi

euid=$(id -u)
privid=$(id -u $PRIV)
if test "$euid" = "$privid"; then
  $COMMAND
else
  case $NEEDS in
  text)
    if test "$euid" != 0; then
      transf "About to execute %s.\n" $COMMAND
      transf "This command needs %s privileges to be executed.\n" $PRIV
    fi
    PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/bin/X11:/usr/local/sbin:/usr/local/bin
    SHELL=`eshell $PRIV`
    case $SU_TO_ROOT_SU in
      sux)  suname=sux; cmd='sux  -p "$PRIV"    "$COMMAND"';;
      sudo) suname=sudo;cmd='sudo -u "$PRIV"    "$COMMAND"';;
      *)    suname=su;  cmd='su   -p "$PRIV" -c "$COMMAND"';;
    esac
    transf 'Using %s...\n' $suname
    transf 'Enter %s passwd:\n' $PRIV
    while ! eval $cmd; do
      transf 'Incorrect password or command failed. Try again? (y/n)'
      read ans
      if test "$ans" != "y" -a "$ans" != "Y"; then
        exit 1
      fi
    done;;
  X11)
    if test -z "$SU_TO_ROOT_X"; then
      if which gksu >/dev/null 2>&1 ; then
        if test "X$KDE_FULL_SESSION" = "Xtrue" \
           && which kdesu >/dev/null 2>&1 ; then
          SU_TO_ROOT_X=kdesu
        else
          SU_TO_ROOT_X=gksu
        fi;
      elif which kdesu >/dev/null 2>&1 ; then 
        SU_TO_ROOT_X=kdesu
      elif which sux >/dev/null 2>&1 ; then 
        SU_TO_ROOT_X=sux
      else
        SU_TO_ROOT_X=su-to-root
      fi
    fi
    case $SU_TO_ROOT_X in
      gksu) gksu -u "$PRIV" "$COMMAND";;
      kdesu) kdesu -u "$PRIV" "$COMMAND";;
      sux) env SU_TO_ROOT_SU=sux \
        x-terminal-emulator -e su-to-root -p "$PRIV" -c "$COMMAND";;
  # As a last resort, open a new x-terminal-emulator and prompt for the password
  # Do not use -X here!
      *) x-terminal-emulator -e su-to-root -p "$PRIV" -c "$COMMAND";;
    esac;;
  esac
fi