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Diffstat (limited to 'man/sd_is_fifo.xml')
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diff --git a/man/sd_is_fifo.xml b/man/sd_is_fifo.xml deleted file mode 100644 index 595c8f112d..0000000000 --- a/man/sd_is_fifo.xml +++ /dev/null @@ -1,217 +0,0 @@ -<?xml version='1.0'?> <!--*-nxml-*--> -<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" - "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> - -<!-- - This file is part of systemd. - - Copyright 2010 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. ---> - -<refentry id="sd_is_fifo"> - - <refentryinfo> - <title>sd_is_fifo</title> - <productname>systemd</productname> - - <authorgroup> - <author> - <contrib>Developer</contrib> - <firstname>Lennart</firstname> - <surname>Poettering</surname> - <email>lennart@poettering.net</email> - </author> - </authorgroup> - </refentryinfo> - - <refmeta> - <refentrytitle>sd_is_fifo</refentrytitle> - <manvolnum>3</manvolnum> - </refmeta> - - <refnamediv> - <refname>sd_is_fifo</refname> - <refname>sd_is_socket</refname> - <refname>sd_is_socket_inet</refname> - <refname>sd_is_socket_unix</refname> - <refname>sd_is_mq</refname> - <refpurpose>Check the type of a file descriptor</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <funcsynopsis> - <funcsynopsisinfo>#include <systemd/sd-daemon.h></funcsynopsisinfo> - - <funcprototype> - <funcdef>int <function>sd_is_fifo</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>const char *<parameter>path</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_is_socket</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>family</parameter></paramdef> - <paramdef>int <parameter>type</parameter></paramdef> - <paramdef>int <parameter>listening</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_is_socket_inet</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>family</parameter></paramdef> - <paramdef>int <parameter>type</parameter></paramdef> - <paramdef>int <parameter>listening</parameter></paramdef> - <paramdef>uint16_t <parameter>port</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_is_socket_unix</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>int <parameter>type</parameter></paramdef> - <paramdef>int <parameter>listening</parameter></paramdef> - <paramdef>const char* <parameter>path</parameter></paramdef> - <paramdef>size_t <parameter>length</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_is_mq</function></funcdef> - <paramdef>int <parameter>fd</parameter></paramdef> - <paramdef>const char *<parameter>path</parameter></paramdef> - </funcprototype> - - </funcsynopsis> - </refsynopsisdiv> - - <refsect1> - <title>Description</title> - - <para><function>sd_is_fifo()</function> may be called - to check whether the specified file descriptor refers - to a FIFO or pipe. If the <parameter>path</parameter> - parameter is not NULL, it is checked whether the FIFO - is bound to the specified file system path.</para> - - <para><function>sd_is_socket()</function> may be - called to check whether the specified file descriptor - refers to a socket. If the - <parameter>family</parameter> parameter is not - AF_UNSPEC it is checked whether the socket is of the - specified family (AF_UNIX, AF_INET, ...). If the - <parameter>type</parameter> parameter is not 0 it is - checked whether the socket is of the specified type - (SOCK_STREAM, SOCK_DGRAM, ...). If the - <parameter>listening</parameter> parameter is positive - it is checked whether the socket is in accepting mode, - i.e. <function>listen()</function> has been called for - it. If <parameter>listening</parameter> is 0, it is - checked whether the socket is not in this mode. If the - parameter is negative, no such check is made. The - <parameter>listening</parameter> parameter should only - be used for stream sockets and should be set to a - negative value otherwise.</para> - - <para><function>sd_is_socket_inet()</function> is - similar to <function>sd_is_socket()</function>, but - optionally checks the IPv4 or IPv6 port number the - socket is bound to, unless <parameter>port</parameter> - is zero. For this call <parameter>family</parameter> - must be passed as either AF_UNSPEC, AF_INET, or - AF_INET6.</para> - - <para><function>sd_is_socket_unix()</function> is - similar to <function>sd_is_socket()</function>, but - optionally checks the AF_UNIX path the socket is bound - to, unless the <parameter>path</parameter> parameter - is NULL. For normal file system AF_UNIX sockets set - the <parameter>length</parameter> parameter to 0. For - Linux abstract namespace sockets set the - <parameter>length</parameter> to the size of the - address, including the initial 0 byte and set - <parameter>path</parameter> to the initial 0 byte of - the socket address.</para> - - <para><function>sd_is_mq()</function> may be called to - check whether the specified file descriptor refers to - a POSIX message queue. If the - <parameter>path</parameter> parameter is not NULL, it - is checked whether the message queue is bound to the - specified name.</para> - </refsect1> - - <refsect1> - <title>Return Value</title> - - <para>On failure, these calls return a negative - errno-style error code. If the file descriptor is of - the specified type and bound to the specified address - a positive return value is returned, otherwise - zero.</para> - </refsect1> - - <refsect1> - <title>Notes</title> - - <para>These functions are provided by the reference - implementation of APIs for new-style daemons and - distributed with the systemd package. The algorithms - they implement are simple, and can easily be - reimplemented in daemons if it is important to support - this interface without using the reference - implementation.</para> - - <para>Internally, these function use a combination of - <filename>fstat()</filename> and - <filename>getsockname()</filename> to check the file - descriptor type and where it is bound to.</para> - - <para>For details about the algorithms check the - liberally licensed reference implementation sources: - <ulink url="http://cgit.freedesktop.org/systemd/systemd/plain/src/libsystemd-daemon/sd-daemon.c"/> - and <ulink - url="http://cgit.freedesktop.org/systemd/systemd/plain/src/systemd/sd-daemon.h"/></para> - - <para><function>sd_is_fifo()</function> and the - related functions are implemented in the reference - implementation's <filename>sd-daemon.c</filename> and - <filename>sd-daemon.h</filename> files. These - interfaces are available as shared library, which can - be compiled and linked to with the - <literal>libsystemd-daemon</literal> - <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> - file. Alternatively, applications consuming these APIs - may copy the implementation into their source - tree. For more details about the reference - implementation see - <citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para> - - <para>These functions continue to work as described, - even if -DDISABLE_SYSTEMD is set during - compilation.</para> - </refsect1> - - <refsect1> - <title>See Also</title> - <para> - <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, - <citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>, - <citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>, - <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>, - <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry> - </para> - </refsect1> - -</refentry> |