402 lines
5.7 KiB
HTML
402 lines
5.7 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>mgetty</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Remote Serial Console HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Configure getty"
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HREF="getty.html"><LINK
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REL="PREVIOUS"
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TITLE="agetty"
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HREF="getty-agetty.html"><LINK
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REL="NEXT"
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TITLE="mingetty"
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HREF="getty-mingetty.html"></HEAD
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><BODY
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CLASS="SECTION"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Remote Serial Console HOWTO</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="getty-agetty.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 6. Configure <SPAN
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CLASS="PRODUCTNAME"
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>getty</SPAN
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></TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="getty-mingetty.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECTION"
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><H1
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CLASS="SECTION"
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><A
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NAME="GETTY-MGETTY"
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></A
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>6.4. <SPAN
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CLASS="PRODUCTNAME"
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>mgetty</SPAN
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></H1
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><P
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><SPAN
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CLASS="PRODUCTNAME"
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>mgetty</SPAN
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> is a modem-aware
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<SPAN
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CLASS="APPLICATION"
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>getty</SPAN
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>. It supports modems with the
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Hayes <SPAN
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CLASS="ACRONYM"
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>AT</SPAN
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> command set and is especially designed
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for supporting modems that are used to send faxes and to dial out
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as well as dial in. These features are not required for a serial
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console.</P
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><P
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><SPAN
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CLASS="APPLICATION"
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>mgetty</SPAN
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> does not require the
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traditional <TT
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CLASS="FILENAME"
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>/etc/gettydefs</TT
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> file. As a result
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<SPAN
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CLASS="APPLICATION"
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>mgetty</SPAN
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> is invoked from
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<TT
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CLASS="FILENAME"
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>/etc/inittab</TT
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> without supplying an entry in
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<TT
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CLASS="FILENAME"
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>/etc/gettydefs</TT
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>.</P
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><DIV
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CLASS="FIGURE"
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><A
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NAME="GETTY-MGETTY-INITTAB"
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></A
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><P
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><B
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>Figure 6-7. <TT
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CLASS="FILENAME"
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>/etc/inittab</TT
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> entry for
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<SPAN
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CLASS="APPLICATION"
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>mgetty</SPAN
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></B
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></P
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><TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="PROGRAMLISTING"
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>co:2345:respawn:/sbin/mgetty ttyS0</PRE
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></FONT
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></TD
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></TR
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></TABLE
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></DIV
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><P
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><SPAN
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CLASS="APPLICATION"
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>mgetty</SPAN
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> is configured using the
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file <TT
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CLASS="FILENAME"
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>/etc/mgetty+sendfax/mgetty.config</TT
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>. It
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should contain an entry for the port used by the serial
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console.</P
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><DIV
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CLASS="FIGURE"
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><A
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NAME="AEN1687"
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></A
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><P
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><B
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>Figure 6-8. <SPAN
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CLASS="APPLICATION"
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>mgetty</SPAN
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> configuration file
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<TT
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CLASS="FILENAME"
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>mgetty.config</TT
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></B
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></P
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><TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="PROGRAMLISTING"
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>port ttyS0
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speed 9600
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direct yes
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data-only yes
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toggle-dtr yes
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need-dsr yes
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port-owner root
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port-group root
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port-mode 600
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login-prompt @ \P login:\040
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login-time 60
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term vt102</PRE
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></FONT
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></TD
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></TR
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></TABLE
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></DIV
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><P
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>All the options are documented in the
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<SPAN
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CLASS="PRODUCTNAME"
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>PostScript</SPAN
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> file
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<TT
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CLASS="FILENAME"
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>/usr/share/doc/mgetty…/mgetty.ps</TT
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>.</P
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><P
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>We set <TT
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CLASS="LITERAL"
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>direct</TT
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>,
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<TT
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CLASS="LITERAL"
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>data-only</TT
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>, <TT
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CLASS="LITERAL"
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>need-dsr</TT
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> and
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<TT
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CLASS="LITERAL"
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>toggle-dtr</TT
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> so that the <SPAN
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CLASS="ACRONYM"
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>RS-232</SPAN
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>
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control lines are used correctly for a dumb modem.</P
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><P
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><TT
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CLASS="LITERAL"
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>port-owner</TT
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>, <TT
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CLASS="LITERAL"
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>port-group</TT
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>
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and <TT
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CLASS="LITERAL"
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>port-mode</TT
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> set the serial device to be
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accessible only by the <SPAN
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CLASS="SYSTEMITEM"
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>root</SPAN
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> user. Modem applications, which
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normally use the <SPAN
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CLASS="SYSTEMITEM"
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>uucp</SPAN
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>
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group, cannot now accidentally use the serial console.</P
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><P
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><TT
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CLASS="LITERAL"
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>login-prompt</TT
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> shows the machine
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(<TT
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CLASS="LITERAL"
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>@</TT
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>) and serial port (<TT
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CLASS="LITERAL"
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>\P</TT
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>)
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being used. The text <TT
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CLASS="LITERAL"
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>\040</TT
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> is simply the octal
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code for a space after <TT
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CLASS="LITERAL"
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>login:</TT
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>.</P
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><P
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><TT
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CLASS="LITERAL"
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>term vt102</TT
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> gives the make and model of the
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terminal most likely to dial in. This sets the
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<TT
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CLASS="VARNAME"
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>TERM</TT
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> environment variable, which you can change
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if you are dialling in from another terminal type.</P
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><P
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>The remaining configuration files,
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<TT
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CLASS="FILENAME"
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>/etc/mgetty+sendfax/dialin.config</TT
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> and
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<TT
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CLASS="FILENAME"
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>/etc/mgetty+sendfax/login.config</TT
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>, do not need
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to be altered.</P
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><P
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>If you wish to alter the suggested configuration then note
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that <SPAN
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CLASS="APPLICATION"
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>mgetty</SPAN
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>'s
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<TT
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CLASS="LITERAL"
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>blocking</TT
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> and <TT
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CLASS="LITERAL"
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>toggle-dtr</TT
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>
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parameters do not co-exist well.</P
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><P
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>If you have difficulties, activate debugging by adding
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<TT
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CLASS="LITERAL"
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>debug 8</TT
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> to <TT
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CLASS="FILENAME"
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>mgetty.config</TT
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>.
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<SPAN
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CLASS="APPLICATION"
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>mgetty</SPAN
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>'s actions are then visible in the
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file <TT
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CLASS="FILENAME"
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>/var/log/mgetty.log.ttyS0</TT
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>.</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
|
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
|
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><A
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HREF="getty-agetty.html"
|
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ACCESSKEY="P"
|
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>Prev</A
|
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
|
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><A
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HREF="index.html"
|
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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HREF="getty-mingetty.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><SPAN
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CLASS="PRODUCTNAME"
|
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>agetty</SPAN
|
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="getty.html"
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>Up</A
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ALIGN="right"
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VALIGN="top"
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><SPAN
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CLASS="PRODUCTNAME"
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>mingetty</SPAN
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></TD
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></BODY
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></HTML
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> |