ar.html

unix 下的C开发手册,还用详细的例程。

<i>file</i>
operands have the same last pathname
component (basename), the results are unspecified.
The implementation's archive format will not truncate valid filenames
of files added to or replaced in the archive.

<dt><i>posname</i><dd>
The name of a file in the archive file, used for
relative positioning; see options
<b>-m</b>
and
<b>-r</b>.

</dl>
</blockquote><h4><a name = "tag_000_000_044">&nbsp;</a>STDIN</h4><blockquote>
Not used.
</blockquote><h4><a name = "tag_000_000_045">&nbsp;</a>INPUT FILES</h4><blockquote>
The input file named by
<i>archive</i>
must be a file in the format created by
<i>ar</i>
<b>-r</b>.
</blockquote><h4><a name = "tag_000_000_046">&nbsp;</a>ENVIRONMENT VARIABLES</h4><blockquote>
The following environment variables affect the execution of
<i>ar</i>:
<dl compact>

<dt><i>LANG</i><dd>Provide a default value for the internationalisation variables
that are unset or null.
If
<i>LANG</i>
is unset or null, the corresponding value from the
implementation-dependent default locale will be used.
If any of the internationalisation variables contains an invalid setting, the
utility will behave as if none of the variables had been defined.

<dt><i>LC_ALL</i><dd>
If set to a non-empty string value,
override the values of all the other internationalisation variables.

<dt><i>LC_CTYPE</i><dd>
Determine the
locale for the interpretation of sequences of bytes of text data as
characters (for example, single- as opposed to multi-byte characters
in arguments and input files).

<dt><i>LC_MESSAGES</i><dd>
Determine the locale that should be used to affect
the format and contents of diagnostic
messages written to standard error.

<dt><i>LC_TIME</i><dd>
Determine the format
and content for date and time
strings written by
<i>ar</i>
<b>-tv</b>.

<dt><i>NLSPATH</i><dd>
Determine the location of message catalogues
for the processing of
<i>LC_MESSAGES .
</i>
<dt><i>TMPDIR</i><dd>
Determine the pathname that
overrides the default directory for temporary files, if any.

</dl>
</blockquote><h4><a name = "tag_000_000_047">&nbsp;</a>ASYNCHRONOUS EVENTS</h4><blockquote>
Default.
</blockquote><h4><a name = "tag_000_000_048">&nbsp;</a>STDOUT</h4><blockquote>
If the
<b>-d</b>
option is used with the
<b>-v</b>
option, the standard output format is:
<code>
<p>
<tt>"d - %s\n"</tt>, &lt;<i>file</i>&gt;
</code>
where
&lt;<i>file</i>&gt;
is the operand specified on the command line.
<p>
If the
<b>-p</b>
option is used with the
<b>-v</b>
option,
<i>ar</i>
will precede the contents of each file with:
<code>
<p>
<tt>"\n&lt;%s&gt;\n\n"</tt>, &lt;<i>file</i>&gt;
</code>
<p>
where
&lt;<i>file</i>&gt;
is the operand specified on the command line, if
<i>file</i>
operands were specified,
and the name of the file in the archive if they were not.
<p>
If the
<b>-r</b>
option is used with the
<b>-v</b>
option, and
<i>file</i>
is already in the archive, the standard output format is:
<code>
<p>
<tt>"r - %s\n"</tt>, &lt;<i>file</i>&gt;
</code>
where
&lt;<i>file</i>&gt;
is the operand specified on the command line.
<p>
If
<i>file</i>
is being added to the archive with the
<b>-r</b>
option, the standard output format is:
<code>
<p>
<tt>"a - %s\n"</tt>, &lt;<i>file</i>&gt;
</code>
where
&lt;<i>file</i>&gt;
is the operand specified on the command line.
<p>
If the
<b>-t</b>
option is used,
<i>ar</i>
writes the names of the files to the standard output in the format:
<code>
<p>
<tt>"%s\n"</tt>, &lt;<i>file</i>&gt;
</code>
where
&lt;<i>file</i>&gt;
is the operand specified on the command line,
if
<i>file</i>
operands were specified, or the name of the file in the
archive if they were not.
<p>
If the
<b>-t</b>
option is used with the
<b>-v</b>
option, the standard output format is:
<code>
<p>
<tt>"%s %u/%u %u %s %d %d:%d %d %s\n"</tt>, &lt;<i>member&nbsp;mode</i>&gt;,
&lt;<i>user&nbsp;ID</i>&gt;,
&lt;<i>group&nbsp;ID</i>&gt;,
&lt;<i>number&nbsp;of&nbsp;bytes&nbsp;in&nbsp;member</i>&gt;,
&lt;<i>abbreviated&nbsp;month</i>&gt;,
&lt;<i>day-of-month</i>&gt;,
&lt;<i>hour</i>&gt;,
&lt;<i>minute</i>&gt;,
&lt;<i>year</i>&gt;,
&lt;<i>file</i>&gt;
</p>
</code>
<p>
Where:
<dl compact>

<dt><i>&lt;file&gt;</i><dd>is the operand specified on the command line, if
<i>file</i>
operands were specified, or the name of the file in the
archive if they were not.

<dt><i>&lt;member&nbsp;mode&gt;</i><dd>is formatted the same as the
&lt;<i>file&nbsp;mode</i>&gt;
string defined in the STDOUT section of
<i><a href="ls.html">ls</a></i>,
except that the first character, the
&lt;<i>entry type</i>&gt;,
is not used;
the string represents the file mode of the archive member
at the time it was added to or replaced in the archive.

</dl>
<p>
The following represent the last-modification time
of a file when it was most recently
added to or replaced in the archive:
<dl compact>

<dt><i>&lt;abbreviated&nbsp;month&gt;</i><dd>
is equivalent to the
<b>%b</b>
format in
<i><a href="date.html">date</a></i>.

<dt><i>&lt;day-of-month&gt;</i><dd>is equivalent to the
<b>%e</b>
format in
<i><a href="date.html">date</a></i>.

<dt><i>&lt;hour&gt;</i><dd>is equivalent to the
<b>%H</b>
format in
<i><a href="date.html">date</a></i>.

<dt><i>&lt;minute&gt;</i><dd>is equivalent to the
<b>%M</b>
format in
<i><a href="date.html">date</a></i>.

<dt><i>&lt;year&gt;</i><dd>is equivalent to the
<b>%Y</b>
format in
<i><a href="date.html">date</a></i>.

</dl>
<p>
When
<i>LC_TIME</i>
does not specify the POSIX locale, a different format
and order of presentation of these fields relative to each other
may be used in a format appropriate in the specified locale.
<p>
If the
<b>-x</b>
option is used with the
<b>-v</b>
option, the standard output format is:
<p><code>
<tt>"x - %s\n"</tt>, &lt;<i>file</i>&gt;
</code>
where
&lt;<i>file</i>&gt;
is the operand specified on the command line,
if
<i>file</i>
operands were specified, or the name of the file in the
archive if they were not.
</blockquote><h4><a name = "tag_000_000_049">&nbsp;</a>STDERR</h4><blockquote>
Used only for diagnostic messages.
The diagnostic message about creating a new archive when
<b>-c</b>
is not specified will not modify the exit status.
</blockquote><h4><a name = "tag_000_000_050">&nbsp;</a>OUTPUT FILES</h4><blockquote>
Archives are files with unspecified formats.
</blockquote><h4><a name = "tag_000_000_051">&nbsp;</a>EXTENDED DESCRIPTION</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_000_052">&nbsp;</a>EXIT STATUS</h4><blockquote>
The following exit values are returned:
<dl compact>

<dt>0<dd>Successful completion.

<dt>&gt;0<dd>An error occurred.

</dl>
</blockquote><h4><a name = "tag_000_000_053">&nbsp;</a>CONSEQUENCES OF ERRORS</h4><blockquote>
Default.
</blockquote><h4><a name = "tag_000_000_054">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_000_055">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_000_056">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
The IEEE PASC 1003.2 Interpretations Committee has forwarded concerns about 
parts of this interface definition to the IEEE PASC Shell and Utilities Working Group
which is identifying the corrections.
A future revision of this specification will align with
IEEE Std. 1003.2b when finalised.
</blockquote><h4><a name = "tag_000_000_057">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="c89.html">c89</a></i>,
<i><a href="cc.html">cc</a></i>,
<i><a href="cpio.html">cpio</a></i>,
<i><a href="pax.html">pax</a></i>,
<i><a href="strip.html">strip</a></i>.
the <b>XSH</b> specification
<i><a href="../xsh/unistd.h.html">&lt;unistd.h&gt;</a></i>
description of
{POSIX_NO_TRUNC}.
</blockquote><hr size=2 noshade>
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Copyright &copy; 1997 The Open Group
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