SYNOPSISzshdb [options] [--] script-name [script options]
zshdb [options] -c execution-string
DESCRIPTION"zshdb" is a zsh script to which arranges for another zsh script to be debugged. The debugger has a similar command interface as gdb(1).
If you used zshdb script and need to pass options to the script to be debugged, add "--" before the script name. That will tell zshdb not to try to process any further options.
- -h | --help
Print a usage message on standard error and exit with a return code
- -A | --annotation level
Sets to output additional stack and status information which allows
front-ends such as emacs to track what's going on without polling.
This is needed in for regression testing. Using this option is equivalent to issuing:
set annotation LEVEL
inside the debugger.
- -B | --basename
In places where a filename appears in debugger output give just the
basename only. This is needed in for regression testing. Using this
option is equivalent to issuing:
set basename on
inside the debugger.
- -n | --nx | --no-init
Normally the debugger will read debugger commands in "~/.zshdbinit"
if that file exists before accepting user interaction.
".zshdbinit" is analogus to Perl's ".perldb" or GNU gdb's
".gdbinit": a user might want to create such a debugger profile to
add various user-specific customizations.
Using the "-n" option this initialization file will not be read. This is useful in regression testing or in tracking down a problem with one's ".zshdbinit" profile.
- -c | --command command-string
Instead of specifying the name of a script file, one can give an
execution string that is to be debugged. Use this option to do that.
- -q | --quiet
Do not print introductory version and copyright information. This is
again useful in regression testing where we don't want to include a
changeable copyright date in the regression-test matching.
- -x | --eval-command debugger-cmdfile
Run the debugger commands debugger-cmdfile before accepting user
input. These commands are read however after any ".zshdbinit"
commands. Again this is useful running regression-testing debug
- -L | --library debugger-library
The debugger needs to source or include a number of functions and
these reside in a library. If this option is not given the default location
of library is relative to the installed zshdb script: "../lib/zshdb".
- -T | --tempdir temporary-file-directory
The debugger needs to make use of some temporary filesystem storage to
save persistent information across a subshell return or in order to
evaluate an expression. The default directory is "/tmp" but you can
use this option to set the directory where debugger temporary files
will be created.
- -t | --tty tty-name
Debugger output usually goes to a terminal rather than stdout or stdin
which the debugged program may use. Determination of the tty or
pseudo-tty is normally done automatically. However if you want to
control where the debugger output goes, use this option.
- -V | --version
- Show version number and no-warranty and exit with return code 1.
BUGSThe way this script arranges debugging to occur is by including (or actually ``source''-ing) some debug-support code and then sourcing the given script or command string.
One problem with sourcing a debugged script is that the program name stored in $0 will not be the name of the script to be debugged. The debugged script will appear in a call stack not as the top item but as the item below "zshdb".
The "zshdb" script option assume a version of zsh with debugging support, zsh 4.3.6-dev-2 or later.
The debugger slows things down a little because the debugger has to intercept every statement and check to see if some action is to be taken.
AUTHORThe current version is maintained (or not) by Rocky Bernstein.
Copyright (C) 2009 Rocky Bernstein 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 of the License, 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; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA