O

O 
[opt[="val"]]
 
[opt`val']
 
[opt?]

Sets or queries option values. If omitted, val defaults to 1 . opt? displays the value of option opt . opt can be abbreviated to the shortest unique string, and multiple options can be specified. The possible options are:

AutoTrace

Affects printing of messages at every possible breaking point.

frame

Enables printing of messages on entry and exit from subroutines.

inhibit_exit

Enables stepping off the end of the script.

maxTraceLen

Gives the maximum length of evals/args listed in the stack trace.

ornaments

Affects the appearance of the command line on the screen.

pager

Specifies the program to use for output of pager-piped commands (those beginning with a | character). Default value is $ENV{PAGER} .

PrintRet

Enables printing of return value after r command.

recallCommand , ShellBang

Specifies the characters used to recall previous commands or spawn a shell. By default, these are both set to ! .

The following options affect what happens with the V , X , and x commands:

arrayDepth , hashDepth

Prints only to depth n ("" for all).

compactDump , veryCompact

Changes style of array and hash dumps.

DumpDBFiles

Dumps arrays holding debugged files.

DumpPackages

Dumps symbol tables of packages.

globPrint

Specifies whether to print contents of globs.

quote , HighBit , undefPrint

Changes style of string dump.

signalLevel , warnLevel , dieLevel

Specifies level of verbosity.

tkRunning

Runs Tk while prompting (with ReadLine).

During startup, debugger options are initialized from $ENV{PERLDB_OPTS} . You can set the additional initialization options TTY , noTTY , ReadLine , and NonStop there. See Section 6.4, "Customizing the Debugger ," later in this chapter, for more information.