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| <h4 class="subsection">2.1.2 Choosing Modes</h4> |
| |
| <p>You can run <span class="sc">gdb</span> in various alternative modes—for example, in |
| batch mode or quiet mode. |
| |
| <dl> |
| <dt><code>-nx</code><dt><code>-n</code><dd><a name="index-g_t_0040code_007b_002d_002dnx_007d-21"></a><a name="index-g_t_0040code_007b_002dn_007d-22"></a>Do not execute commands found in any initialization files. Normally, |
| <span class="sc">gdb</span> executes the commands in these files after all the command |
| options and arguments have been processed. See <a href="Command-Files.html#Command-Files">Command Files</a>. |
| |
| <br><dt><code>-quiet</code><dt><code>-silent</code><dt><code>-q</code><dd><a name="index-g_t_0040code_007b_002d_002dquiet_007d-23"></a><a name="index-g_t_0040code_007b_002d_002dsilent_007d-24"></a><a name="index-g_t_0040code_007b_002dq_007d-25"></a>“Quiet”. Do not print the introductory and copyright messages. These |
| messages are also suppressed in batch mode. |
| |
| <br><dt><code>-batch</code><dd><a name="index-g_t_0040code_007b_002d_002dbatch_007d-26"></a>Run in batch mode. Exit with status <code>0</code> after processing all the |
| command files specified with ‘<samp><span class="samp">-x</span></samp>’ (and all commands from |
| initialization files, if not inhibited with ‘<samp><span class="samp">-n</span></samp>’). Exit with |
| nonzero status if an error occurs in executing the <span class="sc">gdb</span> commands |
| in the command files. Batch mode also disables pagination, sets unlimited |
| terminal width and height see <a href="Screen-Size.html#Screen-Size">Screen Size</a>, and acts as if <kbd>set confirm |
| off</kbd> were in effect (see <a href="Messages_002fWarnings.html#Messages_002fWarnings">Messages/Warnings</a>). |
| |
| <p>Batch mode may be useful for running <span class="sc">gdb</span> as a filter, for |
| example to download and run a program on another computer; in order to |
| make this more useful, the message |
| |
| <pre class="smallexample"> Program exited normally. |
| </pre> |
| <p class="noindent">(which is ordinarily issued whenever a program running under |
| <span class="sc">gdb</span> control terminates) is not issued when running in batch |
| mode. |
| |
| <br><dt><code>-batch-silent</code><dd><a name="index-g_t_0040code_007b_002d_002dbatch_002dsilent_007d-27"></a>Run in batch mode exactly like ‘<samp><span class="samp">-batch</span></samp>’, but totally silently. All |
| <span class="sc">gdb</span> output to <code>stdout</code> is prevented (<code>stderr</code> is |
| unaffected). This is much quieter than ‘<samp><span class="samp">-silent</span></samp>’ and would be useless |
| for an interactive session. |
| |
| <p>This is particularly useful when using targets that give ‘<samp><span class="samp">Loading section</span></samp>’ |
| messages, for example. |
| |
| <p>Note that targets that give their output via <span class="sc">gdb</span>, as opposed to |
| writing directly to <code>stdout</code>, will also be made silent. |
| |
| <br><dt><code>-return-child-result</code><dd><a name="index-g_t_0040code_007b_002d_002dreturn_002dchild_002dresult_007d-28"></a>The return code from <span class="sc">gdb</span> will be the return code from the child |
| process (the process being debugged), with the following exceptions: |
| |
| <ul> |
| <li><span class="sc">gdb</span> exits abnormally. E.g., due to an incorrect argument or an |
| internal error. In this case the exit code is the same as it would have been |
| without ‘<samp><span class="samp">-return-child-result</span></samp>’. |
| <li>The user quits with an explicit value. E.g., ‘<samp><span class="samp">quit 1</span></samp>’. |
| <li>The child process never runs, or is not allowed to terminate, in which case |
| the exit code will be -1. |
| </ul> |
| |
| <p>This option is useful in conjunction with ‘<samp><span class="samp">-batch</span></samp>’ or ‘<samp><span class="samp">-batch-silent</span></samp>’, |
| when <span class="sc">gdb</span> is being used as a remote program loader or simulator |
| interface. |
| |
| <br><dt><code>-nowindows</code><dt><code>-nw</code><dd><a name="index-g_t_0040code_007b_002d_002dnowindows_007d-29"></a><a name="index-g_t_0040code_007b_002dnw_007d-30"></a>“No windows”. If <span class="sc">gdb</span> comes with a graphical user interface |
| (GUI) built in, then this option tells <span class="sc">gdb</span> to only use the command-line |
| interface. If no GUI is available, this option has no effect. |
| |
| <br><dt><code>-windows</code><dt><code>-w</code><dd><a name="index-g_t_0040code_007b_002d_002dwindows_007d-31"></a><a name="index-g_t_0040code_007b_002dw_007d-32"></a>If <span class="sc">gdb</span> includes a GUI, then this option requires it to be |
| used if possible. |
| |
| <br><dt><code>-cd </code><var>directory</var><dd><a name="index-g_t_0040code_007b_002d_002dcd_007d-33"></a>Run <span class="sc">gdb</span> using <var>directory</var> as its working directory, |
| instead of the current directory. |
| |
| <br><dt><code>-fullname</code><dt><code>-f</code><dd><a name="index-g_t_0040code_007b_002d_002dfullname_007d-34"></a><a name="index-g_t_0040code_007b_002df_007d-35"></a><span class="sc">gnu</span> Emacs sets this option when it runs <span class="sc">gdb</span> as a |
| subprocess. It tells <span class="sc">gdb</span> to output the full file name and line |
| number in a standard, recognizable fashion each time a stack frame is |
| displayed (which includes each time your program stops). This |
| recognizable format looks like two ‘<samp><span class="samp">\032</span></samp>’ characters, followed by |
| the file name, line number and character position separated by colons, |
| and a newline. The Emacs-to-<span class="sc">gdb</span> interface program uses the two |
| ‘<samp><span class="samp">\032</span></samp>’ characters as a signal to display the source code for the |
| frame. |
| |
| <br><dt><code>-epoch</code><dd><a name="index-g_t_0040code_007b_002d_002depoch_007d-36"></a>The Epoch Emacs-<span class="sc">gdb</span> interface sets this option when it runs |
| <span class="sc">gdb</span> as a subprocess. It tells <span class="sc">gdb</span> to modify its print |
| routines so as to allow Epoch to display values of expressions in a |
| separate window. |
| |
| <br><dt><code>-annotate </code><var>level</var><dd><a name="index-g_t_0040code_007b_002d_002dannotate_007d-37"></a>This option sets the <dfn>annotation level</dfn> inside <span class="sc">gdb</span>. Its |
| effect is identical to using ‘<samp><span class="samp">set annotate </span><var>level</var></samp>’ |
| (see <a href="Annotations.html#Annotations">Annotations</a>). The annotation <var>level</var> controls how much |
| information <span class="sc">gdb</span> prints together with its prompt, values of |
| expressions, source lines, and other types of output. Level 0 is the |
| normal, level 1 is for use when <span class="sc">gdb</span> is run as a subprocess of |
| <span class="sc">gnu</span> Emacs, level 3 is the maximum annotation suitable for programs |
| that control <span class="sc">gdb</span>, and level 2 has been deprecated. |
| |
| <p>The annotation mechanism has largely been superseded by <span class="sc">gdb/mi</span> |
| (see <a href="GDB_002fMI.html#GDB_002fMI">GDB/MI</a>). |
| |
| <br><dt><code>--args</code><dd><a name="index-g_t_0040code_007b_002d_002dargs_007d-38"></a>Change interpretation of command line so that arguments following the |
| executable file are passed as command line arguments to the inferior. |
| This option stops option processing. |
| |
| <br><dt><code>-baud </code><var>bps</var><dt><code>-b </code><var>bps</var><dd><a name="index-g_t_0040code_007b_002d_002dbaud_007d-39"></a><a name="index-g_t_0040code_007b_002db_007d-40"></a>Set the line speed (baud rate or bits per second) of any serial |
| interface used by <span class="sc">gdb</span> for remote debugging. |
| |
| <br><dt><code>-l </code><var>timeout</var><dd><a name="index-g_t_0040code_007b_002dl_007d-41"></a>Set the timeout (in seconds) of any communication used by <span class="sc">gdb</span> |
| for remote debugging. |
| |
| <br><dt><code>-tty </code><var>device</var><dt><code>-t </code><var>device</var><dd><a name="index-g_t_0040code_007b_002d_002dtty_007d-42"></a><a name="index-g_t_0040code_007b_002dt_007d-43"></a>Run using <var>device</var> for your program's standard input and output. |
| <!-- FIXME: kingdon thinks there is more to -tty. Investigate. --> |
| |
| <!-- resolve the situation of these eventually --> |
| <br><dt><code>-tui</code><dd><a name="index-g_t_0040code_007b_002d_002dtui_007d-44"></a>Activate the <dfn>Text User Interface</dfn> when starting. The Text User |
| Interface manages several text windows on the terminal, showing |
| source, assembly, registers and <span class="sc">gdb</span> command outputs |
| (see <a href="TUI.html#TUI"><span class="sc">gdb</span> Text User Interface</a>). Alternatively, the |
| Text User Interface can be enabled by invoking the program |
| ‘<samp><span class="samp">gdbtui</span></samp>’. Do not use this option if you run <span class="sc">gdb</span> from |
| Emacs (see <a href="Emacs.html#Emacs">Using <span class="sc">gdb</span> under <span class="sc">gnu</span> Emacs</a>). |
| |
| <!-- @item -xdb --> |
| <!-- @cindex @code{-xdb} --> |
| <!-- Run in XDB compatibility mode, allowing the use of certain XDB commands. --> |
| <!-- For information, see the file @file{xdb_trans.html}, which is usually --> |
| <!-- installed in the directory @code{/opt/langtools/wdb/doc} on HP-UX --> |
| <!-- systems. --> |
| <br><dt><code>-interpreter </code><var>interp</var><dd><a name="index-g_t_0040code_007b_002d_002dinterpreter_007d-45"></a>Use the interpreter <var>interp</var> for interface with the controlling |
| program or device. This option is meant to be set by programs which |
| communicate with <span class="sc">gdb</span> using it as a back end. |
| See <a href="Interpreters.html#Interpreters">Command Interpreters</a>. |
| |
| <p>‘<samp><span class="samp">--interpreter=mi</span></samp>’ (or ‘<samp><span class="samp">--interpreter=mi2</span></samp>’) causes |
| <span class="sc">gdb</span> to use the <span class="sc">gdb/mi</span><dfn> interface</dfn> (see <a href="GDB_002fMI.html#GDB_002fMI">The <span class="sc">gdb/mi</span> Interface</a>) included since <span class="sc">gdb</span> version 6.0. The |
| previous <span class="sc">gdb/mi</span> interface, included in <span class="sc">gdb</span> version 5.3 and |
| selected with ‘<samp><span class="samp">--interpreter=mi1</span></samp>’, is deprecated. Earlier |
| <span class="sc">gdb/mi</span> interfaces are no longer supported. |
| |
| <br><dt><code>-write</code><dd><a name="index-g_t_0040code_007b_002d_002dwrite_007d-46"></a>Open the executable and core files for both reading and writing. This |
| is equivalent to the ‘<samp><span class="samp">set write on</span></samp>’ command inside <span class="sc">gdb</span> |
| (see <a href="Patching.html#Patching">Patching</a>). |
| |
| <br><dt><code>-statistics</code><dd><a name="index-g_t_0040code_007b_002d_002dstatistics_007d-47"></a>This option causes <span class="sc">gdb</span> to print statistics about time and |
| memory usage after it completes each command and returns to the prompt. |
| |
| <br><dt><code>-version</code><dd><a name="index-g_t_0040code_007b_002d_002dversion_007d-48"></a>This option causes <span class="sc">gdb</span> to print its version number and |
| no-warranty blurb, and exit. |
| |
| </dl> |
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