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<a href="CedarBackup2-module.html">Package CedarBackup2</a> ::
Module cli
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<!-- ==================== MODULE DESCRIPTION ==================== -->
<h1 class="epydoc">Module cli</h1><p class="nomargin-top"><span class="codelink"><a href="CedarBackup2.cli-pysrc.html">source code</a></span></p>
<p>Provides command-line interface implementation for the cback
script.</p>
<h1 class="heading">Summary</h1>
<p>The functionality in this module encapsulates the command-line
interface for the cback script. The cback script itself is very short,
basically just an invokation of one function implemented here. That,
in turn, makes it simpler to validate the command line interface (for
instance, it's easier to run pychecker against a module, and unit tests
are easier, too).</p>
<p>The objects and functions implemented in this module are probably
not useful to any code external to Cedar Backup. Anyone else
implementing their own command-line interface would have to reimplement
(or at least enhance) all of this anyway.</p>
<h1 class="heading">Backwards Compatibility</h1>
<p>The command line interface has changed between Cedar Backup 1.x and
Cedar Backup 2.x. Some new switches have been added, and the actions
have become simple arguments rather than switches (which is a much more
standard command line format). Old 1.x command lines are generally no
longer valid.</p>
<hr />
<div class="fields"> <p><strong>Author:</strong>
Kenneth J. Pronovici <pronovic@ieee.org>
</p>
</div><!-- ==================== CLASSES ==================== -->
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<a href="CedarBackup2.cli.Options-class.html" class="summary-name">Options</a><br />
Class representing command-line options for the cback script.
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Class representing a single action to be executed.
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Class representing a single action to be executed on a managed
peer.
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<a href="CedarBackup2.cli._ActionSet-class.html" class="summary-name" onclick="show_private();">_ActionSet</a><br />
Class representing a set of local actions to be executed.
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<!-- ==================== FUNCTIONS ==================== -->
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<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#cli" class="summary-sig-name">cli</a>()</span><br />
Implements the command-line interface for the <code>cback</code>
script.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#cli">source code</a></span>
</td>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#_usage" class="summary-sig-name" onclick="show_private();">_usage</a>(<span class="summary-sig-arg">fd</span>=<span class="summary-sig-default">sys.stdout</span>)</span><br />
Prints usage information for the cback script.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_usage">source code</a></span>
</td>
</tr>
</table>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#_version" class="summary-sig-name" onclick="show_private();">_version</a>(<span class="summary-sig-arg">fd</span>=<span class="summary-sig-default">sys.stdout</span>)</span><br />
Prints version information for the cback script.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_version">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#_diagnostics" class="summary-sig-name" onclick="show_private();">_diagnostics</a>(<span class="summary-sig-arg">fd</span>=<span class="summary-sig-default">sys.stdout</span>)</span><br />
Prints runtime diagnostics information.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_diagnostics">source code</a></span>
</td>
</tr>
</table>
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#setupLogging" class="summary-sig-name">setupLogging</a>(<span class="summary-sig-arg">options</span>)</span><br />
Set up logging based on command-line options.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#setupLogging">source code</a></span>
</td>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#_setupLogfile" class="summary-sig-name" onclick="show_private();">_setupLogfile</a>(<span class="summary-sig-arg">options</span>)</span><br />
Sets up and creates logfile as needed.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupLogfile">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#_setupFlowLogging" class="summary-sig-name" onclick="show_private();">_setupFlowLogging</a>(<span class="summary-sig-arg">logfile</span>,
<span class="summary-sig-arg">options</span>)</span><br />
Sets up flow logging.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupFlowLogging">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr class="private">
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#_setupOutputLogging" class="summary-sig-name" onclick="show_private();">_setupOutputLogging</a>(<span class="summary-sig-arg">logfile</span>,
<span class="summary-sig-arg">options</span>)</span><br />
Sets up command output logging.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupOutputLogging">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr class="private">
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#_setupDiskFlowLogging" class="summary-sig-name" onclick="show_private();">_setupDiskFlowLogging</a>(<span class="summary-sig-arg">flowLogger</span>,
<span class="summary-sig-arg">logfile</span>,
<span class="summary-sig-arg">options</span>)</span><br />
Sets up on-disk flow logging.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupDiskFlowLogging">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#_setupScreenFlowLogging" class="summary-sig-name" onclick="show_private();">_setupScreenFlowLogging</a>(<span class="summary-sig-arg">flowLogger</span>,
<span class="summary-sig-arg">options</span>)</span><br />
Sets up on-screen flow logging.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupScreenFlowLogging">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr class="private">
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#_setupDiskOutputLogging" class="summary-sig-name" onclick="show_private();">_setupDiskOutputLogging</a>(<span class="summary-sig-arg">outputLogger</span>,
<span class="summary-sig-arg">logfile</span>,
<span class="summary-sig-arg">options</span>)</span><br />
Sets up on-disk command output logging.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupDiskOutputLogging">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="CedarBackup2.cli-module.html#setupPathResolver" class="summary-sig-name">setupPathResolver</a>(<span class="summary-sig-arg">config</span>)</span><br />
Set up the path resolver singleton based on configuration.</td>
<td align="right" valign="top">
<span class="codelink"><a href="CedarBackup2.cli-pysrc.html#setupPathResolver">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
</table>
<!-- ==================== VARIABLES ==================== -->
<a name="section-Variables"></a>
<table class="summary" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td colspan="2" class="table-header">
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr valign="top">
<td align="left"><span class="table-header">Variables</span></td>
<td align="right" valign="top"
><span class="options">[<a href="#section-Variables"
class="privatelink" onclick="toggle_private();"
>hide private</a>]</span></td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="DEFAULT_CONFIG"></a><span class="summary-name">DEFAULT_CONFIG</span> = <code title="'/etc/cback.conf'"><code class="variable-quote">'</code><code class="variable-string">/etc/cback.conf</code><code class="variable-quote">'</code></code><br />
The default configuration file.
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="DEFAULT_LOGFILE"></a><span class="summary-name">DEFAULT_LOGFILE</span> = <code title="'/var/log/cback.log'"><code class="variable-quote">'</code><code class="variable-string">/var/log/cback.log</code><code class="variable-quote">'</code></code><br />
The default log file path.
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="DEFAULT_OWNERSHIP"></a><span class="summary-name">DEFAULT_OWNERSHIP</span> = <code title="['root', 'adm']"><code class="variable-group">[</code><code class="variable-quote">'</code><code class="variable-string">root</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">adm</code><code class="variable-quote">'</code><code class="variable-group">]</code></code><br />
Default ownership for the logfile.
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="DEFAULT_MODE"></a><span class="summary-name">DEFAULT_MODE</span> = <code title="416">416</code><br />
Default file permissions mode on the logfile.
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a href="CedarBackup2.cli-module.html#VALID_ACTIONS" class="summary-name">VALID_ACTIONS</a> = <code title="['collect',
'stage',
'store',
'purge',
'rebuild',
'validate',
'initialize',
'all']"><code class="variable-group">[</code><code class="variable-quote">'</code><code class="variable-string">collect</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">stage</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">store</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">purge</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">rebuil</code><code class="variable-ellipsis">...</code></code><br />
List of valid actions.
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="COMBINE_ACTIONS"></a><span class="summary-name">COMBINE_ACTIONS</span> = <code title="['collect', 'stage', 'store', 'purge']"><code class="variable-group">[</code><code class="variable-quote">'</code><code class="variable-string">collect</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">stage</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">store</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">purge</code><code class="variable-quote">'</code><code class="variable-group">]</code></code><br />
List of actions which can be combined with other actions.
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="NONCOMBINE_ACTIONS"></a><span class="summary-name">NONCOMBINE_ACTIONS</span> = <code title="['rebuild', 'validate', 'initialize', 'all']"><code class="variable-group">[</code><code class="variable-quote">'</code><code class="variable-string">rebuild</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">validate</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">initialize</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">all</code><code class="variable-quote">'</code><code class="variable-group">]</code></code><br />
List of actions which cannot be combined with other actions.
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="logger"></a><span class="summary-name">logger</span> = <code title="logging.getLogger("CedarBackup2.log.cli")">logging.getLogger("CedarBackup2.log.cli")</code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="DISK_LOG_FORMAT"></a><span class="summary-name">DISK_LOG_FORMAT</span> = <code title="'%(asctime)s --> [%(levelname)-7s] %(message)s'"><code class="variable-quote">'</code><code class="variable-string">%(asctime)s --> [%(levelname)-7s] %(message)s</code><code class="variable-quote">'</code></code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="DISK_OUTPUT_FORMAT"></a><span class="summary-name">DISK_OUTPUT_FORMAT</span> = <code title="'%(message)s'"><code class="variable-quote">'</code><code class="variable-string">%(message)s</code><code class="variable-quote">'</code></code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="SCREEN_LOG_FORMAT"></a><span class="summary-name">SCREEN_LOG_FORMAT</span> = <code title="'%(message)s'"><code class="variable-quote">'</code><code class="variable-string">%(message)s</code><code class="variable-quote">'</code></code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="SCREEN_LOG_STREAM"></a><span class="summary-name">SCREEN_LOG_STREAM</span> = <code title="sys.stdout">sys.stdout</code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="DATE_FORMAT"></a><span class="summary-name">DATE_FORMAT</span> = <code title="'%Y-%m-%dT%H:%M:%S %Z'"><code class="variable-quote">'</code><code class="variable-string">%Y-%m-%dT%H:%M:%S %Z</code><code class="variable-quote">'</code></code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="REBUILD_INDEX"></a><span class="summary-name">REBUILD_INDEX</span> = <code title="0">0</code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="VALIDATE_INDEX"></a><span class="summary-name">VALIDATE_INDEX</span> = <code title="0">0</code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="INITIALIZE_INDEX"></a><span class="summary-name">INITIALIZE_INDEX</span> = <code title="0">0</code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="COLLECT_INDEX"></a><span class="summary-name">COLLECT_INDEX</span> = <code title="100">100</code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="STAGE_INDEX"></a><span class="summary-name">STAGE_INDEX</span> = <code title="200">200</code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="STORE_INDEX"></a><span class="summary-name">STORE_INDEX</span> = <code title="300">300</code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="PURGE_INDEX"></a><span class="summary-name">PURGE_INDEX</span> = <code title="400">400</code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a name="SHORT_SWITCHES"></a><span class="summary-name">SHORT_SWITCHES</span> = <code title="'hVbqc:fMNl:o:m:OdsD'"><code class="variable-quote">'</code><code class="variable-string">hVbqc:fMNl:o:m:OdsD</code><code class="variable-quote">'</code></code>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<a href="CedarBackup2.cli-module.html#LONG_SWITCHES" class="summary-name">LONG_SWITCHES</a> = <code title="['help',
'version',
'verbose',
'quiet',
'config=',
'full',
'managed',
'managed-only',
..."><code class="variable-group">[</code><code class="variable-quote">'</code><code class="variable-string">help</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">version</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">verbose</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">quiet</code><code class="variable-quote">'</code><code class="variable-op">, </code><code class="variable-quote">'</code><code class="variable-string">confi</code><code class="variable-ellipsis">...</code></code>
</td>
</tr>
</table>
<!-- ==================== FUNCTION DETAILS ==================== -->
<a name="section-FunctionDetails"></a>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
<td colspan="2" class="table-header">
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr valign="top">
<td align="left"><span class="table-header">Function Details</span></td>
<td align="right" valign="top"
><span class="options">[<a href="#section-FunctionDetails"
class="privatelink" onclick="toggle_private();"
>hide private</a>]</span></td>
</tr>
</table>
</td>
</tr>
</table>
<a name="cli"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">cli</span>()</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#cli">source code</a></span>
</td>
</tr></table>
<p>Implements the command-line interface for the <code>cback</code>
script.</p>
<p>Essentially, this is the "main routine" for the cback
script. It does all of the argument processing for the script, and then
sets about executing the indicated actions.</p>
<p>As a general rule, only the actions indicated on the command line will
be executed. We will accept any of the built-in actions and any of the
configured extended actions (which makes action list verification a two-
step process).</p>
<p>The <code>'all'</code> action has a special meaning: it means that the
built-in set of actions (collect, stage, store, purge) will all be
executed, in that order. Extended actions will be ignored as part of the
<code>'all'</code> action.</p>
<p>Raised exceptions always result in an immediate return. Otherwise, we
generally return when all specified actions have been completed. Actions
are ignored if the help, version or validate flags are set.</p>
<p>A different error code is returned for each type of failure:</p>
<ul>
<li>
<code>1</code>: The Python interpreter version is < 2.5
</li>
<li>
<code>2</code>: Error processing command-line arguments
</li>
<li>
<code>3</code>: Error configuring logging
</li>
<li>
<code>4</code>: Error parsing indicated configuration file
</li>
<li>
<code>5</code>: Backup was interrupted with a CTRL-C or similar
</li>
<li>
<code>6</code>: Error executing specified backup actions
</li>
</ul>
<dl class="fields">
<dt>Returns:</dt>
<dd>Error code as described above.</dd>
</dl>
<div class="fields"> <strong>Notes:</strong>
<ul class="nomargin-top">
<li>
This function contains a good amount of logging at the INFO level,
because this is the right place to document high-level flow of
control (i.e. what the command-line options were, what config file
was being used, etc.)
</li>
<li>
We assume that anything that <i>must</i> be seen on the screen is
logged at the ERROR level. Errors that occur before logging can be
configured are written to <code>sys.stderr</code>.
</li>
</ul>
</div></td></tr></table>
</div>
<a name="_usage"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">_usage</span>(<span class="sig-arg">fd</span>=<span class="sig-default">sys.stdout</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_usage">source code</a></span>
</td>
</tr></table>
<p>Prints usage information for the cback script.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>fd</code></strong> - File descriptor used to print information.</li>
</ul></dd>
</dl>
<div class="fields"> <p><strong>Note:</strong>
The <code>fd</code> is used rather than <code>print</code> to
facilitate unit testing.
</p>
</div></td></tr></table>
</div>
<a name="_version"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">_version</span>(<span class="sig-arg">fd</span>=<span class="sig-default">sys.stdout</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_version">source code</a></span>
</td>
</tr></table>
<p>Prints version information for the cback script.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>fd</code></strong> - File descriptor used to print information.</li>
</ul></dd>
</dl>
<div class="fields"> <p><strong>Note:</strong>
The <code>fd</code> is used rather than <code>print</code> to
facilitate unit testing.
</p>
</div></td></tr></table>
</div>
<a name="_diagnostics"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">_diagnostics</span>(<span class="sig-arg">fd</span>=<span class="sig-default">sys.stdout</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_diagnostics">source code</a></span>
</td>
</tr></table>
<p>Prints runtime diagnostics information.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>fd</code></strong> - File descriptor used to print information.</li>
</ul></dd>
</dl>
<div class="fields"> <p><strong>Note:</strong>
The <code>fd</code> is used rather than <code>print</code> to
facilitate unit testing.
</p>
</div></td></tr></table>
</div>
<a name="setupLogging"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">setupLogging</span>(<span class="sig-arg">options</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#setupLogging">source code</a></span>
</td>
</tr></table>
<p>Set up logging based on command-line options.</p>
<p>There are two kinds of logging: flow logging and output logging.
Output logging contains information about system commands executed by
Cedar Backup, for instance the calls to <code>mkisofs</code> or
<code>mount</code>, etc. Flow logging contains error and informational
messages used to understand program flow. Flow log messages and output
log messages are written to two different loggers target
(<code>CedarBackup2.log</code> and <code>CedarBackup2.output</code>).
Flow log messages are written at the ERROR, INFO and DEBUG log levels,
while output log messages are generally only written at the INFO log
level.</p>
<p>By default, output logging is disabled. When the
<code>options.output</code> or <code>options.debug</code> flags are set,
output logging will be written to the configured logfile. Output logging
is never written to the screen.</p>
<p>By default, flow logging is enabled at the ERROR level to the screen
and at the INFO level to the configured logfile. If the
<code>options.quiet</code> flag is set, flow logging is enabled at the
INFO level to the configured logfile only (i.e. no output will be sent to
the screen). If the <code>options.verbose</code> flag is set, flow
logging is enabled at the INFO level to both the screen and the
configured logfile. If the <code>options.debug</code> flag is set, flow
logging is enabled at the DEBUG level to both the screen and the
configured logfile.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>options</code></strong> (<a href="CedarBackup2.cli.Options-class.html"
class="link">Options</a> object) - Command-line options.</li>
</ul></dd>
<dt>Returns:</dt>
<dd>Path to logfile on disk.</dd>
</dl>
</td></tr></table>
</div>
<a name="_setupLogfile"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">_setupLogfile</span>(<span class="sig-arg">options</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupLogfile">source code</a></span>
</td>
</tr></table>
<p>Sets up and creates logfile as needed.</p>
<p>If the logfile already exists on disk, it will be left as-is, under
the assumption that it was created with appropriate ownership and
permissions. If the logfile does not exist on disk, it will be created as
an empty file. Ownership and permissions will remain at their defaults
unless user/group and/or mode are set in the options. We ignore errors
setting the indicated user and group.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>options</code></strong> - Command-line options.</li>
</ul></dd>
<dt>Returns:</dt>
<dd>Path to logfile on disk.</dd>
</dl>
<div class="fields"> <p><strong>Note:</strong>
This function is vulnerable to a race condition. If the log file
does not exist when the function is run, it will attempt to create
the file as safely as possible (using <code>O_CREAT</code>). If
two processes attempt to create the file at the same time, then one
of them will fail. In practice, this shouldn't really be a
problem, but it might happen occassionally if two instances of
cback run concurrently or if cback collides with logrotate or
something.
</p>
</div></td></tr></table>
</div>
<a name="_setupFlowLogging"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">_setupFlowLogging</span>(<span class="sig-arg">logfile</span>,
<span class="sig-arg">options</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupFlowLogging">source code</a></span>
</td>
</tr></table>
<p>Sets up flow logging.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>logfile</code></strong> - Path to logfile on disk.</li>
<li><strong class="pname"><code>options</code></strong> - Command-line options.</li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<a name="_setupOutputLogging"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">_setupOutputLogging</span>(<span class="sig-arg">logfile</span>,
<span class="sig-arg">options</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupOutputLogging">source code</a></span>
</td>
</tr></table>
<p>Sets up command output logging.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>logfile</code></strong> - Path to logfile on disk.</li>
<li><strong class="pname"><code>options</code></strong> - Command-line options.</li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<a name="_setupDiskFlowLogging"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">_setupDiskFlowLogging</span>(<span class="sig-arg">flowLogger</span>,
<span class="sig-arg">logfile</span>,
<span class="sig-arg">options</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupDiskFlowLogging">source code</a></span>
</td>
</tr></table>
<p>Sets up on-disk flow logging.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>flowLogger</code></strong> - Python flow logger object.</li>
<li><strong class="pname"><code>logfile</code></strong> - Path to logfile on disk.</li>
<li><strong class="pname"><code>options</code></strong> - Command-line options.</li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<a name="_setupScreenFlowLogging"></a>
<div class="private">
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">_setupScreenFlowLogging</span>(<span class="sig-arg">flowLogger</span>,
<span class="sig-arg">options</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupScreenFlowLogging">source code</a></span>
</td>
</tr></table>
<p>Sets up on-screen flow logging.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>flowLogger</code></strong> - Python flow logger object.</li>
<li><strong class="pname"><code>options</code></strong> - Command-line options.</li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<a name="_setupDiskOutputLogging"></a>
<div class="private">
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cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">_setupDiskOutputLogging</span>(<span class="sig-arg">outputLogger</span>,
<span class="sig-arg">logfile</span>,
<span class="sig-arg">options</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#_setupDiskOutputLogging">source code</a></span>
</td>
</tr></table>
<p>Sets up on-disk command output logging.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>outputLogger</code></strong> - Python command output logger object.</li>
<li><strong class="pname"><code>logfile</code></strong> - Path to logfile on disk.</li>
<li><strong class="pname"><code>options</code></strong> - Command-line options.</li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<a name="setupPathResolver"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr valign="top"><td>
<h3 class="epydoc"><span class="sig"><span class="sig-name">setupPathResolver</span>(<span class="sig-arg">config</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="CedarBackup2.cli-pysrc.html#setupPathResolver">source code</a></span>
</td>
</tr></table>
<p>Set up the path resolver singleton based on configuration.</p>
<p>Cedar Backup's path resolver is implemented in terms of a singleton,
the <a href="CedarBackup2.util.PathResolverSingleton-class.html"
class="link">PathResolverSingleton</a> class. This function takes
options configuration, converts it into the dictionary form needed by the
singleton, and then initializes the singleton. After that, any function
that needs to resolve the path of a command can use the singleton.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>config</code></strong> (<a href="CedarBackup2.config.Config-class.html"
class="link">Config</a> object) - Configuration</li>
</ul></dd>
</dl>
</td></tr></table>
</div>
<br />
<!-- ==================== VARIABLES DETAILS ==================== -->
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<tr bgcolor="#70b0f0" class="table-header">
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<td align="left"><span class="table-header">Variables Details</span></td>
<td align="right" valign="top"
><span class="options">[<a href="#section-VariablesDetails"
class="privatelink" onclick="toggle_private();"
>hide private</a>]</span></td>
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<a name="VALID_ACTIONS"></a>
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cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<h3 class="epydoc">VALID_ACTIONS</h3>
List of valid actions.
<dl class="fields">
</dl>
<dl class="fields">
<dt>Value:</dt>
<dd><table><tr><td><pre class="variable">
<code class="variable-group">[</code><code class="variable-quote">'</code><code class="variable-string">collect</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">stage</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">store</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">purge</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">rebuild</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">validate</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">initialize</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">all</code><code class="variable-quote">'</code><code class="variable-group">]</code>
</pre></td></tr></table>
</dd>
</dl>
</td></tr></table>
</div>
<a name="LONG_SWITCHES"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
<tr><td>
<h3 class="epydoc">LONG_SWITCHES</h3>
<dl class="fields">
</dl>
<dl class="fields">
<dt>Value:</dt>
<dd><table><tr><td><pre class="variable">
<code class="variable-group">[</code><code class="variable-quote">'</code><code class="variable-string">help</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">version</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">verbose</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">quiet</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">config=</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">full</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">managed</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-quote">'</code><code class="variable-string">managed-only</code><code class="variable-quote">'</code><code class="variable-op">,</code>
<code class="variable-ellipsis">...</code>
</pre></td></tr></table>
</dd>
</dl>
</td></tr></table>
</div>
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