178 lines
4.0 KiB
HTML
178 lines
4.0 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of GETTTYENT</TITLE>
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</HEAD><BODY>
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<H1>GETTTYENT</H1>
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Section: Linux Programmer's Manual (3)<BR>Updated: 2017-09-15<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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getttyent, getttynam, setttyent, endttyent - get ttys file entry
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>#include <<A HREF="file:///usr/include/ttyent.h">ttyent.h</A>></B>
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<P>
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<B>struct ttyent *getttyent(void);</B>
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<P>
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<B>struct ttyent *getttynam(const char *</B><I>name</I><B>);</B>
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<P>
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<B>int setttyent(void);</B>
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<P>
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<B>int endttyent(void);</B>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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These functions provide an interface to the file
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<B>_PATH_TTYS</B>
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(e.g.,
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<I>/etc/ttys</I>).
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<P>
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The function
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<B>setttyent</B>()
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opens the file or rewinds it if already open.
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<P>
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The function
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<B>endttyent</B>()
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closes the file.
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<P>
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The function
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<B>getttynam</B>()
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searches for a given terminal name in the file.
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It returns a pointer to a
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<I>ttyent</I>
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structure (description below).
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<P>
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The function
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<B>getttyent</B>()
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opens the file
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<B>_PATH_TTYS</B>
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(if necessary) and returns the first entry.
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If the file is already open, the next entry.
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The
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<I>ttyent</I>
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structure has the form:
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<P>
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struct ttyent {
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<BR> char *ty_name; /* terminal device name */
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<BR> char *ty_getty; /* command to execute, usually getty */
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<BR> char *ty_type; /* terminal type for termcap */
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<BR> int ty_status; /* status flags */
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<BR> char *ty_window; /* command to start up window manager */
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<BR> char *ty_comment; /* comment field */
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};
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<P>
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<I>ty_status</I>
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can be:
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<P>
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#define TTY_ON 0x01 /* enable logins (start ty_getty program) */
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#define TTY_SECURE 0x02 /* allow UID 0 to login */
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<A NAME="lbAE"> </A>
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<H2>ATTRIBUTES</H2>
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For an explanation of the terms used in this section, see
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<B><A HREF="/cgi-bin/man/man2html?7+attributes">attributes</A></B>(7).
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<TABLE BORDER>
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<TR VALIGN=top><TD><B>Interface</B></TD><TD><B>Attribute</B></TD><TD><B>Value</B><BR></TD></TR>
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<TR VALIGN=top><TD>
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<B>getttyent</B>(),
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<B>setttyent</B>(),
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<B>endttyent</B>(),
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<B>getttynam</B>()
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</TD><TD>Thread safety</TD><TD>MT-Unsafe race:ttyent<BR></TD></TR>
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</TABLE>
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<A NAME="lbAF"> </A>
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<H2>CONFORMING TO</H2>
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Not in POSIX.1.
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Present on the BSDs, and perhaps other systems.
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<A NAME="lbAG"> </A>
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<H2>NOTES</H2>
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Under Linux, the file
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<I>/etc/ttys</I>,
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and the functions described above, are not used.
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<A NAME="lbAH"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?3+ttyname">ttyname</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+ttyslot">ttyslot</A></B>(3)
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<A NAME="lbAI"> </A>
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<H2>COLOPHON</H2>
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This page is part of release 5.05 of the Linux
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<I>man-pages</I>
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project.
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A description of the project,
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information about reporting bugs,
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and the latest version of this page,
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can be found at
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<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="3"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="4"><A HREF="#lbAE">ATTRIBUTES</A><DD>
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<DT id="5"><A HREF="#lbAF">CONFORMING TO</A><DD>
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<DT id="6"><A HREF="#lbAG">NOTES</A><DD>
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<DT id="7"><A HREF="#lbAH">SEE ALSO</A><DD>
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<DT id="8"><A HREF="#lbAI">COLOPHON</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:44 GMT, March 31, 2021
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