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# -*- shell-script -*-
# handle.sh - gdb-like "handle" debugger command
#
# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2008 Rocky Bernstein
# rocky@gnu.org
#
# bashdb 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.
#
# bashdb 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 bashdb; see the file COPYING. If not, write to the Free Software
# Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
# Process debugger "handle" command.
_Dbg_help_add handle \
"handle SIGNAL ACTION -- Specify how to handle SIGNAL.
SIGNAL is a signal name like SIGSEGV, but numeric signals like 11
(which is usually equivalent on \*nix systems) is okay too.
ACTION is one of \"stop\", \"nostop\", \"print\", and
\"noprint\". \"Stop\" indicates entering debugger if this signal
happens. \"Print\" indicates printing a message if this signal is
encountered. \"Stack\" is like \"print\" but except the entire call
stack is printed. Prefacing these actions with \"no\" indicates not to
do the indicated action."
_Dbg_do_handle() {
typeset sig=$1
typeset cmd=$2
typeset -i signum
if [[ -z $sig ]] ; then
_Dbg_msg "Missing signal name or signal number."
return 1
fi
eval "$_seteglob"
if [[ $sig == $int_pat ]]; then
eval "$_resteglob"
signame=$(_Dbg_signum2name $sig)
if (( $? != 0 )) ; then
_Dbg_msg "Bad signal number: $sig"
return 1
fi
signum=sig
else
eval "$_resteglob"
typeset signum;
signum=$(_Dbg_name2signum $sig)
if (( $? != 0 )) ; then
_Dbg_msg "Bad signal name: $sig"
return 1
fi
fi
case $cmd in
nop | nopr | nopri | noprin | noprint )
_Dbg_sig_print[signum]='noprint'
# noprint implies nostop
_Dbg_sig_stop[signum]='stop'
;;
nosta | nostac | nostack )
_Dbg_sig_show_stack[signum]='nostack'
;;
nosto | nostop )
_Dbg_sig_stop[signum]='nostop'
;;
p | pr | pri | prin | print )
_Dbg_sig_print[signum]='print'
;;
sta | stac | stack )
_Dbg_sig_show_stack[signum]='showstack'
;;
sto | stop )
_Dbg_sig_stop[signum]='stop'
# stop keyword implies print
_Dbg_sig_print[signum]='print'
;;
* )
if (( !cmd )) ; then
_Dbg_msg \
"Need to give a command: stop, nostop, stack, nostack, print, noprint"
else
_Dbg_msg "Invalid handler command $cmd"
fi
;;
esac
}
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