mirror of
https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@337883 c90b9560-bf6c-de11-be94-00142212c4b1
384 lines
11 KiB
XML
384 lines
11 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<appendix xml:id="posix.constants" xmlns="http://docbook.org/ns/docbook">
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&reftitle.constants;
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&extension.constants;
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<section xml:id="posix.constants.access">
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<title><function>posix_access</function> constants</title>
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<note>
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<para>
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These constants are available starting with PHP 5.1.0. Please note that
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some of them may not be available on your system.
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</para>
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</note>
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<variablelist>
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<varlistentry xml:id="constant.posix-f-ok">
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<term>
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<constant>POSIX_F_OK</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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Check whether the file exists.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-r-ok">
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<term>
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<constant>POSIX_R_OK</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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Check whether the file exists and has read permissions.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-w-ok">
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<term>
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<constant>POSIX_W_OK</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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Check whether the file exists and has write permissions.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-x-ok">
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<term>
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<constant>POSIX_X_OK</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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Check whether the file exists and has execute permissions.
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</simpara>
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</listitem>
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</varlistentry>
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</variablelist>
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</section>
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<section xml:id="posix.constants.mknod">
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<title><function>posix_mknod</function> constants</title>
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<note>
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<para>
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These constants are available starting with PHP 5.1.0. Please note that
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some of them may not be available on your system.
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</para>
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</note>
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<variablelist>
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<varlistentry xml:id="constant.posix-s-ifblk">
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<term>
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<constant>POSIX_S_IFBLK</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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Block special file
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-s-ifchr">
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<term>
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<constant>POSIX_S_IFCHR</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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Character special file
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-s-ififo">
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<term>
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<constant>POSIX_S_IFIFO</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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FIFO (named pipe) special file
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-s-ifreg">
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<term>
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<constant>POSIX_S_IFREG</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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Normal file
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-s-ifsock">
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<term>
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<constant>POSIX_S_IFSOCK</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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Socket
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</simpara>
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</listitem>
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</varlistentry>
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</variablelist>
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</section>
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<section xml:id="posix.constants.setrlimit">
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<title><function>posix_setrlimit</function> constants</title>
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<note>
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<para>
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These constants are available starting with PHP 7.0.0. Please note that
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some of them may not be available on your system.
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</para>
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</note>
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<note>
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<para>
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You may wish to read the below notes in conjunction with the manpage for
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<function>setrlimit</function> on your specific operating system, as there
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is variance in how these limits are interpreted, even across operating
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systems that claim to implement POSIX in full.
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</para>
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</note>
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<variablelist>
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<varlistentry xml:id="constant.posix-rlimit-as">
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<term>
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<constant>POSIX_RLIMIT_AS</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum size of the process's address space in bytes. See also PHP's
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<link linkend="ini.memory-limit">memory_limit</link> configuration
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directive.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-core">
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<term>
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<constant>POSIX_RLIMIT_CORE</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum size of a core file. If the limit is set to 0, no core file
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will be generated.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-cpu">
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<term>
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<constant>POSIX_RLIMIT_CPU</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum amount of CPU time that the process can use, in seconds.
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When the soft limit is hit, a <literal>SIGXCPU</literal> signal will be
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sent, which can be caught with <function>pcntl_signal</function>.
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Depending on the operating system, additional <literal>SIGXCPU</literal>
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signals may be sent each second until the hard limit is hit, at which
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point an uncatchable <literal>SIGKILL</literal> signal is sent.
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</simpara>
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<simpara>
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See also <function>set_time_limit</function>.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-data">
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<term>
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<constant>POSIX_RLIMIT_DATA</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum size of the process's data segment, in bytes. It is
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extremely unlikely that this will have any effect on the execution of
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PHP unless an extension is in use that calls <function>brk</function> or
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<function>sbrk</function>.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-fsize">
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<term>
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<constant>POSIX_RLIMIT_FSIZE</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum size of files that the process can create, in bytes.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-locks">
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<term>
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<constant>POSIX_RLIMIT_LOCKS</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum number of locks that the process can create. This is only
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supported on extremely old Linux kernels.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-memlock">
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<term>
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<constant>POSIX_RLIMIT_MEMLOCK</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum number of bytes that can be locked into memory.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-msgqueue">
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<term>
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<constant>POSIX_RLIMIT_MSGQUEUE</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum number of bytes that can be allocated for POSIX message
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queues. PHP does not ship with support for POSIX message queues, so this
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limit will not have any effect unless you are using an extension that
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implements that support.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-nice">
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<term>
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<constant>POSIX_RLIMIT_NICE</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum value to which the process can be
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<link linkend="function.pcntl-setpriority">reniced</link> to. The value
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that will be used will be <literal>20 - limit</literal>, as resource
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limit values cannot be negative.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-nofile">
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<term>
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<constant>POSIX_RLIMIT_NOFILE</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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A value one greater than the maximum file descriptor number that can be
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opened by this process.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-nproc">
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<term>
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<constant>POSIX_RLIMIT_NPROC</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum number of processes (and/or threads, on some operating
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systems) that can be created for the real user ID of the process.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-rss">
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<term>
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<constant>POSIX_RLIMIT_RSS</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum size of the process's resident set, in pages.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-rtprio">
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<term>
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<constant>POSIX_RLIMIT_RTPRIO</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum real time priority that can be set via the
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<function>sched_setscheduler</function> and
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<function>sched_setparam</function> system calls.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-rttime">
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<term>
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<constant>POSIX_RLIMIT_RTTIME</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum amount of CPU time, in microseconds, that the process can
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consume without making a blocking system call if it is using real time
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scheduling.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-sigpending">
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<term>
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<constant>POSIX_RLIMIT_SIGPENDING</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum number of signals that can be queued for the real user ID of
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the process.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-stack">
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<term>
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<constant>POSIX_RLIMIT_STACK</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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The maximum size of the process stack, in bytes.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="constant.posix-rlimit-infinity">
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<term>
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<constant>POSIX_RLIMIT_INFINITY</constant>
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(<type>integer</type>)
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</term>
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<listitem>
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<simpara>
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Used to indicate an infinite value for a resource limit.
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</simpara>
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</listitem>
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</varlistentry>
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</variablelist>
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</section>
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</appendix>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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