kshdb.in

#!@SH_PROG@
# -*- shell-script -*-
# top-level debugger program.
#
#   Copyright (C) 2008, 2009, 2011, 2018 Rocky Bernstein <rocky@gnu.org>
#
#   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; either version 2, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#   General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with This program; see the file COPYING.  If not, write to
#   the Free Software Foundation, 59 Temple Place, Suite 330, Boston,
#   MA 02111 USA.

# This routine gets called via the -c or --command option and its sole
# purpose is to capture the command string such as via "x $*" or
# in a traceback ("where").
function _Dbg_eval {
  eval $*  # Type: "x $*" to see what's being run.
}

typeset -a _Dbg_script_args=("$@")

# Original $0. Note we can't set this in an include.
typeset _Dbg_orig_0=$0

# Equivalent to basename $0; the short program name
typeset _Dbg_pname=${0##*/}

## Stuff set by autoconf/configure ###
typeset prefix=@prefix@
typeset _Dbg_libdir=@PKGDATADIR@
###

# Name we refer to ourselves by
typeset _Dbg_debugger_name='@PACKAGE@'

# The shell we are configured to run under.
typeset _Dbg_shell='@SH_PROG@'

# The release name we are configured to run under.
typeset _Dbg_release='@PACKAGE_VERSION@'

# The short shell name. Helps keep code common in bash, zsh, and ksh debuggers.
typeset _Dbg_shell_name=${_Dbg_shell##*/}  # Equivalent to basename(_Dbg_shell)

# Parse just the libdir option
typeset -i _Dbg_i
for ((_Dbg_i=0; $_Dbg_i<${#_Dbg_script_args[@]}-1; _Dbg_i++)) ; do
    typeset arg=${_Dbg_script_args[$_Dbg_i]}
    if [[ $arg == '-L' || $arg == '--library' ]] ; then
        ((_Dbg_i++))
        _Dbg_libdir="${_Dbg_script_args[$_Dbg_i]}"
        break
    fi
done

if [[ ! -d $_Dbg_libdir ]] && [[ ! -d $_Dbg_libdir ]] ; then
  echo "${_Dbg_pname}: Can't read debugger library directory '${_Dbg_libdir}'."
  echo "${_Dbg_pname}: Perhaps @PACKAGE@ is installed wrong (if its installed)." >&2
  echo "${_Dbg_pname}: Try running @PACKAGE@ using -L (with a different directory)." >&2
  echo "${_Dbg_pname}: Run @PACKAGE@ --help for a list and explanation of options." >&2
  exit 1
fi

# [[ $# == 0 && -z $show_version && -z $_Dbg_cmd ]] && {
#   echo "${_Dbg_pname}: Need to give a script name to debug."
#   exit 1
# }

# Pull in the rest of the debugger code.
typeset _Dbg_main="$_Dbg_libdir/dbg-main.sh"
if [[ ! -r $_Dbg_main ]] ; then
  print "${_Dbg_pname}: Can't read debugger library file '${_Dbg_main}'."
  print "${_Dbg_pname}: Perhaps @PACKAGE@ is installed wrong (if its installed)." >&2
  print "${_Dbg_pname}: Try running @PACKAGE@ using -L (with a different directory)." >&2
  print "${_Dbg_pname}: Run @PACKAGE@ --help for a list and explanation of options." >&2
  exit 1
fi

. ${_Dbg_libdir}/dbg-main.sh

_Dbg_set_debugger_entry

# Note that this is called via kshdb rather than "ksh --debugger" or kshdb-trace
_Dbg_script=1

if [[ -n $_Dbg_EXECUTION_STRING ]] ; then
    _Dbg_script_file=$(_Dbg_tempname cmd)
    echo "$_Dbg_EXECUTION_STRING" >$_Dbg_script_file
fi

if (( ${#_Dbg_script_args[@]} > 0 )) ; then
    _Dbg_script_file="${_Dbg_script_args[0]}"
    case ${_Dbg_script_file:0:1} in
        '.' | '/' )
            # Leave alone
            ;;
    * )
            # Make . explicit.
            _Dbg_script_file="./${_Dbg_script_file}"
            _Dbg_script_args[0]="$_Dbg_script_file"
    esac
    # FIXME:
    # shift _Dbg_script_args
elif [[ -z $_Dbg_EXECUTION_STRING ]] ; then
    echo >&2 "${_Dbg_pname}: need to give a script to debug or use the -c option."
    exit 1
fi

if [[ ! -r "$_Dbg_script_file" ]] ; then
  echo "${_Dbg_pname}: cannot read program to debug: $_Dbg_script_file." >&2
  exit 1
fi

_Dbg_step_ignore=2
while : ; do
    # We need to escape the script arguments in case there are
    # embedded blanks say in the debugged script filename. The below
    # two lines are the only way I know how to do this. Perhaps
    # there's a simpler way?
    source_cmd=$(printf '%q ' "${_Dbg_script_args[@]}")
    eval "trap '_Dbg_trap_handler $? \$@' DEBUG; source $source_cmd"
    trap '' DEBUG
    _Dbg_msg_nocr 'Program terminated.'
    if (( !o_no_quit )); then
        _Dbg_msg "Type 's' to restart."
        _Dbg_process_commands
        _Dbg_step_ignore=2
        # _Dbg_msg "Type 's' or 'R' to restart."
    else
        _Dbg_msg ''
        break
    fi
done