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  60. Next: <a href="GDB_002fMI-Output-Syntax.html#GDB_002fMI-Output-Syntax" accesskey="n" rel="next">GDB/MI Output Syntax</a>, Up: <a href="GDB_002fMI-Command-Syntax.html#GDB_002fMI-Command-Syntax" accesskey="u" rel="up">GDB/MI Command Syntax</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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  63. <a name="GDB_002fMI-Input-Syntax-1"></a>
  64. <h4 class="subsection">27.2.1 <small>GDB/MI</small> Input Syntax</h4>
  65. <a name="index-input-syntax-for-GDB_002fMI"></a>
  66. <a name="index-GDB_002fMI_002c-input-syntax"></a>
  67. <dl compact="compact">
  68. <dt><code><var>command</var> &rarr;</code></dt>
  69. <dd><p><code><var>cli-command</var> | <var>mi-command</var></code>
  70. </p>
  71. </dd>
  72. <dt><code><var>cli-command</var> &rarr;</code></dt>
  73. <dd><p><code>[ <var>token</var> ] <var>cli-command</var> <var>nl</var></code>, where
  74. <var>cli-command</var> is any existing <small>GDB</small> CLI command.
  75. </p>
  76. </dd>
  77. <dt><code><var>mi-command</var> &rarr;</code></dt>
  78. <dd><p><code>[ <var>token</var> ] &quot;-&quot; <var>operation</var> ( &quot; &quot; <var>option</var> )*
  79. <code>[</code> &quot; --&quot; <code>]</code> ( &quot; &quot; <var>parameter</var> )* <var>nl</var></code>
  80. </p>
  81. </dd>
  82. <dt><code><var>token</var> &rarr;</code></dt>
  83. <dd><p>&quot;any sequence of digits&quot;
  84. </p>
  85. </dd>
  86. <dt><code><var>option</var> &rarr;</code></dt>
  87. <dd><p><code>&quot;-&quot; <var>parameter</var> [ &quot; &quot; <var>parameter</var> ]</code>
  88. </p>
  89. </dd>
  90. <dt><code><var>parameter</var> &rarr;</code></dt>
  91. <dd><p><code><var>non-blank-sequence</var> | <var>c-string</var></code>
  92. </p>
  93. </dd>
  94. <dt><code><var>operation</var> &rarr;</code></dt>
  95. <dd><p><em>any of the operations described in this chapter</em>
  96. </p>
  97. </dd>
  98. <dt><code><var>non-blank-sequence</var> &rarr;</code></dt>
  99. <dd><p><em>anything, provided it doesn&rsquo;t contain special characters such as
  100. &quot;-&quot;, <var>nl</var>, &quot;&quot;&quot; and of course &quot; &quot;</em>
  101. </p>
  102. </dd>
  103. <dt><code><var>c-string</var> &rarr;</code></dt>
  104. <dd><p><code>&quot;&quot;&quot; <var>seven-bit-iso-c-string-content</var> &quot;&quot;&quot;</code>
  105. </p>
  106. </dd>
  107. <dt><code><var>nl</var> &rarr;</code></dt>
  108. <dd><p><code>CR | CR-LF</code>
  109. </p></dd>
  110. </dl>
  111. <p>Notes:
  112. </p>
  113. <ul>
  114. <li> The CLI commands are still handled by the <small>MI</small> interpreter; their
  115. output is described below.
  116. </li><li> The <code><var>token</var></code>, when present, is passed back when the command
  117. finishes.
  118. </li><li> Some <small>MI</small> commands accept optional arguments as part of the parameter
  119. list. Each option is identified by a leading &lsquo;<samp>-</samp>&rsquo; (dash) and may be
  120. followed by an optional argument parameter. Options occur first in the
  121. parameter list and can be delimited from normal parameters using
  122. &lsquo;<samp>--</samp>&rsquo; (this is useful when some parameters begin with a dash).
  123. </li></ul>
  124. <p>Pragmatics:
  125. </p>
  126. <ul>
  127. <li> We want easy access to the existing CLI syntax (for debugging).
  128. </li><li> We want it to be easy to spot a <small>MI</small> operation.
  129. </li></ul>
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