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<html><head>
<title>FBB::Exception</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1>FBB::Exception</h1>
<h2>libbobcat-dev_3.19.01-x.tar.gz</h2>
<h2>2005-2013</h2>

<html><head>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1></h1>

<html><head>
<title>FBB::Exception(3bobcat)</title>
<link rev="made" href="mailto:Frank B. Brokken: f.b.brokken@rug.nl">
</head>
<body text="#27408B" bgcolor="#FFFAF0">
<hr>
<h1>FBB::Exception(3bobcat)</h1>
<h2>libbobcat-dev_3.19.01-x.tar.gz Error handler</h2>
<h2>2005-2013</h2>


<p>
<h2>NAME</h2>FBB::Exception - std::exception objects acception stream insertions
<p>
<h2>SYNOPSIS</h2>
    <strong>#include &lt;bobcat/exception&gt;</strong><br>
    Linking option: <em>-lbobcat</em> 
<p>
<h2>DESCRIPTION</h2>
       <strong>FBB::Exception</strong> objects derived from <em>std::exception</em>, but accept
stream insertions. Their intended use consists of throwing an anonymous
object, into which the text of the <em>std::exception::what</em> 
message has been inserted.
<p>
<em>Exception</em> exceptions are thrown by several Bobcat classes. These
classes are <em>
Arg, 
ArgConfig,
BigInt,
Cgi,
Cidr,
ClientSocket,
CmdFinderBase,
ConfigFile,
DateTime,
DecryptBuf,
DigestBuf,
EncryptBuf,
Fork,
GetHostent,
Glob,
HMacBuf,
Hostname,
LocalClientSocket,
LocalServerSocket,
LocalSocketBase,
Log,
MailHeaders,
Mbuf,
Milter,
Mstream,
OFoldStreambuf,
OneKey,
Pattern,
Pipe,
Process,
Redirector,
Selector,
ServerSocket,
Signal,
SocketBase,
Stat,
TempStream,
User,
Xpointer</em>
<p>
<h2>NAMESPACE</h2>
    <strong>FBB</strong><br>
    All constructors, members, operators and manipulators, mentioned in this
man-page, are defined in the namespace <strong>FBB</strong>.
<p>
<h2>INHERITS FROM</h2>
    <strong>std::exception</strong>
<p>
<h2>ENUMERATION</h2>
    The enumeration <em>Protection</em> is used by the member <em>protection</em>
described below. The enumeration has two values:
    <ul>
    <li> <em>ANY</em>: an existing file may have any set of protection bits;
    <li> <em>EQUAL</em>: an existing file mut have exactly the set of protection bits
        as specified when calling <em>Exception::protection</em>.
    </ul>
<p>
<h2>CONSTRUCTORS</h2>
    <ul>
    <li> <strong>Exception()</strong>:<br>
    The default constructor
    <li> <strong>Exception(int errnoValue)</strong>:<br> 
    This constructor stores the provided <em>errnoValue</em> value in the global
<em>::errno</em> variable, provided by the run-time support system.
    </ul>
    Move and copy constructors are available.
<p>
<h2>MEMBER FUNCTIONS</h2>
     All members of <strong>std::exception</strong> are
available, as <strong>FBB::Exception</strong> inherits from this class.
    <ul>
    <li> <strong>char const *what() const noexcept(true) override</strong>:<br> 
    Returns the text that was inserted into the <strong>FBB::Exception</strong> object.
    </ul>
<p>
<h2>OVERLOADED OPERATORS</h2>
    <ul>
    <li> <strong>Exception &amp;&amp;operator&lt;&lt;(Exception &amp;&amp;in, Type const &amp;t)</strong>:<br>
    A function template implementing the overloaded insertion operator. It
can be used to insert values of any type that can also be inserted into an
<em>ostringstream</em> object.
    </ul>
    The overloaded assignment and move assignment operators are  available.
<p>
<h2>STATIC MEMBERS</h2>
<p>
The following convenience functions can be used for controlled opening of
stream-type objects, like <em>std::ofstream</em> and <em>std::ifstream</em>. These
stream-type objects must support <em>open</em> and <em>close</em> members, like those
provided by <em>std::ifstream</em> and <em>std::ofstream</em>. 
<p>
If the stream  was already open it is first closed.
<p>
If opening fails an <em>FBB::Exception</em> exception is thrown containing a
short message stating that the named stream could not be opened. 
<p>
<ul>
    <li> <strong>static void open(StreamType &amp;stream, std::string const &amp;name)</strong>:<br>
        Opens the stream object, using its default <em>open</em> member.
<p>
<li> <strong>static void open(int errnoValue, 
                         StreamType &amp;stream, std::string const &amp;name)</strong>:<br>
       Opens the stream object, using its default <em>open</em> member. If opening
        the stream fails, then the thrown <strong>FBB::Exception</strong> assigns
<em>errnoValue</em> to <em>::errno</em>.
<p>
<li> <strong>static void open(StreamType &amp;stream, std::string const &amp;name,
                                    std::ios::openmode mode)</strong>:<br>
       Opens the stream object, using its <em>open</em> member, passing <em>mode</em> to
        <em>open</em>.
<p>
<li> <strong>static void open(int errnoValue, StreamType &amp;stream,
                        std::string const &amp;name, std::ios::openmode mode)</strong>:<br>
       Opens the stream object, using its <em>open</em> member, passing <em>mode</em> to
        <em>open</em>. If opening the stream fails, then the thrown
        <strong>FBB::Exception</strong> assigns <em>errnoValue</em> to <em>::errno</em>.
<p>
<li> <strong>static size_t protection(std::string const &amp;path, size_t protect, 
                          Protection type = EQUAL)</strong>:<br>
       Returns the protection bits (cf. <strong>open</strong>(2)) of <em>path</em>. The
        <em>protect</em> parameter is used to specify the requested protection
        bits. This value is usually specified as an octal value. If the
        specified value exceeds 0777 an exception is thrown. The third
        parameter is only used in combination with already existing files. If
        specified as <em>ANY</em> the file's actual permission bits are not
        compared with <em>protect</em>; if specified as <em>EQUAL</em> the file's
        permission bits must be identical to <em>protect</em>, or an exception is
        thrown. If <em>path</em> does not yet exist a file <em>path</em> with permission
        <em>protect</em> is created. This member returns <em>path</em>'s permission
        bits. 
<p>
If <em>path</em> is created by <em>protection</em>, then opening a stream for
        <em>path</em> does not change <em>path</em>'s protection. 
    </ul>
<p>
<h2>MANIPULATOR</h2>
<p>
The following manipulator (which is <em>not</em> part of the
<strong>FBB::Exception</strong>, class, but <em>is</em> defined in the <strong>FBB</strong> namespace) can be
inserted into the <strong>FBB::Exception</strong> object:
    <ul>
    <li> <strong>FBB::errnodescr</strong>:<br> 
        The descriptive text associated with the current <em>errno</em> value is
inserted into the <strong>FBB::Exception</strong> object (it can also be used to insert the
descriptive text in a <em>std::ostream</em> object). No text is inserted if
<em>errno</em> equals zero. This manipulator is thread-safe (but <em>errno</em> may be
modified when <em>errno</em> holds an invalid value).
    </ul>
<p>
<h2>EXAMPLE</h2>
        <pre>

    if (exceptionalCondition)
        throw FBB::Exception(1) &lt;&lt; "Exceptional condition occurred";
        
</pre>

<p>
<h2>FILES</h2>
    <em>bobcat/exception</em> - defines the class interface
<p>
<h2>SEE ALSO</h2>
    <strong>bobcat</strong>(7)
<p>
<h2>BUGS</h2>
    None Reported.
<p>

<h2>DISTRIBUTION FILES</h2>
    <ul>
    <li> <em>bobcat_3.19.01-x.dsc</em>: detached signature;
    <li> <em>bobcat_3.19.01-x.tar.gz</em>: source archive;
    <li> <em>bobcat_3.19.01-x_i386.changes</em>: change log;
    <li> <em>libbobcat1_3.19.01-x_*.deb</em>: debian package holding the
            libraries;
    <li> <em>libbobcat1-dev_3.19.01-x_*.deb</em>: debian package holding the
            libraries, headers and manual pages;
    <li> <em>http://sourceforge.net/projects/bobcat</em>: public archive location;
    </ul>
<p>
<h2>BOBCAT</h2>
    Bobcat is an acronym of `Brokken's Own Base Classes And Templates'.
<p>
<h2>COPYRIGHT</h2>
    This is free software, distributed under the terms of the 
    GNU General Public License (GPL).
<p>
<h2>AUTHOR</h2>
    Frank B. Brokken (<strong>f.b.brokken@rug.nl</strong>).
<p>