<citerefentry><refentrytitle>sd_is_socket_inet</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_is_socket_unix</refentrytitle><manvolnum>3</manvolnum></citerefentry>
are provided. In order to maximize flexibility it is
- recommened to make these checks as loose as possible
+ recommended to make these checks as loose as possible
without allowing incorrect setups. i.e. often the
actual port number a socket is bound to matters little
for the service to work, hence it should not be
verified. On the other hand, whether a socket is a
datagram or stream socket matters a lot for the most
- common program logics and should hence be
- checked.</para>
+ common program logics and should be checked.</para>
<para>This function call will set the FD_CLOEXEC flag
for all passed file descriptors to avoid further
<para>On failure, this call returns a negative
errno-style error code. If
<varname>$LISTEN_FDS</varname>/<varname>$LISTEN_PID</varname>
- was not set or not correctly set for this daemon and
- hence no file descriptors received 0 is
+ was not set or was not correctly set for this daemon and
+ hence no file descriptors were received, 0 is
returned. Otherwise the number of file descriptors
- passed is returned, the application may find them
+ passed is returned. The application may find them
starting with file descriptor SD_LISTEN_FDS_START,
i.e. file descriptor 3.</para>
</refsect1>
become a NOP.</para>
</refsect1>
+ <refsect1>
+ <title>Environment</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><varname>$LISTEN_PID</varname></term>
+ <term><varname>$LISTEN_FDS</varname></term>
+
+ <listitem><para>Set by the init system
+ for supervised processes that use
+ socket-based activation. This
+ environment variable specifies the
+ data
+ <function>sd_listen_fds()</function>
+ parses. See above for
+ details.</para></listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
<refsect1>
<title>See Also</title>