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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Chapter 37. Portability</title><link rel="stylesheet" href="samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.60.1"><link rel="home" href="index.html" title="SAMBA Project Documentation"><link rel="up" href="Appendixes.html" title="Part VI. Appendixes"><link rel="previous" href="compiling.html" title="Chapter 36. How to compile SAMBA"><link rel="next" href="Other-Clients.html" title="Chapter 38. Samba and other CIFS clients"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 37. Portability</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="compiling.html">Prev</a> </td><th width="60%" align="center">Part VI. Appendixes</th><td width="20%" align="right"> <a accesskey="n" href="Other-Clients.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="Portability"></a>Chapter 37. Portability</h2></div><div><div class="author"><h3 class="author"><span class="firstname">Jelmer</span> <span class="othername">R.</span> <span class="surname">Vernooij</span></h3><div class="affiliation"><span class="orgname">The Samba Team<br></span><div class="address"><p><tt class="email"><<a href="mailto:jelmer@samba.org">jelmer@samba.org</a>></tt></p></div></div></div></div></div><div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><a href="Portability.html#id3013478">HPUX</a></dt><dt><a href="Portability.html#id3016009">SCO Unix</a></dt><dt><a href="Portability.html#id3016039">DNIX</a></dt><dt><a href="Portability.html#id3016210">RedHat Linux Rembrandt-II</a></dt><dt><a href="Portability.html#id3016254">AIX</a></dt><dd><dl><dt><a href="Portability.html#id3016261">Sequential Read Ahead</a></dt></dl></dd><dt><a href="Portability.html#id3016287">Solaris</a></dt><dd><dl><dt><a href="Portability.html#id3016294">Locking improvements</a></dt><dt><a href="Portability.html#winbind-solaris9">Winbind on Solaris 9</a></dt></dl></dd></dl></div><p>Samba works on a wide range of platforms but the interface all the
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platforms provide is not always compatible. This chapter contains
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platform-specific information about compiling and using samba.</p><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id3013478"></a>HPUX</h2></div></div><div></div></div><p>
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HP's implementation of supplementary groups is, er, non-standard (for
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hysterical reasons). There are two group files, <tt class="filename">/etc/group</tt> and
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<tt class="filename">/etc/logingroup</tt>; the system maps UIDs to numbers using the former, but
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initgroups() reads the latter. Most system admins who know the ropes
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symlink <tt class="filename">/etc/group</tt> to <tt class="filename">/etc/logingroup</tt>
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(hard link doesn't work for reasons too stupid to go into here). initgroups() will complain if one of the
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groups you're in in <tt class="filename">/etc/logingroup</tt> has what it considers to be an invalid
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ID, which means outside the range <tt class="constant">[0..UID_MAX]</tt>, where <tt class="constant">UID_MAX</tt> is (I think)
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60000 currently on HP-UX. This precludes -2 and 65534, the usual <tt class="constant">nobody</tt>
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GIDs.
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</p><p>
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If you encounter this problem, make sure that the programs that are failing
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to initgroups() be run as users not in any groups with GIDs outside the
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allowed range.
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</p><p>This is documented in the HP manual pages under setgroups(2) and passwd(4).
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</p><p>
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On HPUX you must use gcc or the HP ANSI compiler. The free compiler
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that comes with HP-UX is not ANSI compliant and cannot compile
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Samba.
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</p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id3016009"></a>SCO Unix</h2></div></div><div></div></div><p>
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If you run an old version of SCO Unix then you may need to get important
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TCP/IP patches for Samba to work correctly. Without the patch, you may
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encounter corrupt data transfers using samba.
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</p><p>
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The patch you need is UOD385 Connection Drivers SLS. It is available from
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SCO (<a href="ftp://ftp.sco.com/" target="_top">ftp.sco.com</a>, directory SLS,
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files uod385a.Z and uod385a.ltr.Z).
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</p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id3016039"></a>DNIX</h2></div></div><div></div></div><p>
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DNIX has a problem with seteuid() and setegid(). These routines are
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needed for Samba to work correctly, but they were left out of the DNIX
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C library for some reason.
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</p><p>
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For this reason Samba by default defines the macro NO_EID in the DNIX
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section of includes.h. This works around the problem in a limited way,
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but it is far from ideal, some things still won't work right.
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</p><p>
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To fix the problem properly you need to assemble the following two
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functions and then either add them to your C library or link them into
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Samba.
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</p><p>
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put this in the file <tt class="filename">setegid.s</tt>:
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</p><pre class="programlisting">
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.globl _setegid
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_setegid:
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moveq #47,d0
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movl #100,a0
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moveq #1,d1
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movl 4(sp),a1
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trap #9
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bccs 1$
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jmp cerror
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1$:
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clrl d0
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rts
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</pre><p>
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put this in the file <tt class="filename">seteuid.s</tt>:
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</p><pre class="programlisting">
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.globl _seteuid
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_seteuid:
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moveq #47,d0
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movl #100,a0
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moveq #0,d1
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movl 4(sp),a1
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trap #9
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bccs 1$
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jmp cerror
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1$:
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clrl d0
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rts
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</pre><p>
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after creating the above files you then assemble them using
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</p><pre class="screen">
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<tt class="prompt">$ </tt><b class="userinput"><tt>as seteuid.s</tt></b>
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<tt class="prompt">$ </tt><b class="userinput"><tt>as setegid.s</tt></b>
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</pre><p>
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that should produce the files <tt class="filename">seteuid.o</tt> and
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<tt class="filename">setegid.o</tt>
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</p><p>
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then you need to add these to the LIBSM line in the DNIX section of
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the Samba Makefile. Your LIBSM line will then look something like this:
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</p><pre class="programlisting">
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LIBSM = setegid.o seteuid.o -ln
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</pre><p>
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You should then remove the line:
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</p><pre class="programlisting">
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#define NO_EID
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</pre><p>from the DNIX section of <tt class="filename">includes.h</tt></p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id3016210"></a>RedHat Linux Rembrandt-II</h2></div></div><div></div></div><p>
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By default RedHat Rembrandt-II during installation adds an
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entry to <tt class="filename">/etc/hosts</tt> as follows:
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</p><pre class="programlisting">
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127.0.0.1 loopback "hostname"."domainname"
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</pre><p>
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</p><p>
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This causes Samba to loop back onto the loopback interface.
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The result is that Samba fails to communicate correctly with
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the world and therefor may fail to correctly negotiate who
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is the master browse list holder and who is the master browser.
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</p><p>
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Corrective Action: Delete the entry after the word loopback
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in the line starting 127.0.0.1
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</p></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id3016254"></a>AIX</h2></div></div><div></div></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id3016261"></a>Sequential Read Ahead</h3></div></div><div></div></div><p>
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Disabling Sequential Read Ahead using <b class="userinput"><tt>vmtune -r 0</tt></b> improves
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Samba performance significantly.
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</p></div></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id3016287"></a>Solaris</h2></div></div><div></div></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="id3016294"></a>Locking improvements</h3></div></div><div></div></div><p>Some people have been experiencing problems with F_SETLKW64/fcntl
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when running Samba on Solaris. The built in file locking mechanism was
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not scalable. Performance would degrade to the point where processes would
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get into loops of trying to lock a file. It would try a lock, then fail,
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then try again. The lock attempt was failing before the grant was
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occurring. So the visible manifestation of this would be a handful of
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processes stealing all of the CPU, and when they were trussed they would
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be stuck if F_SETLKW64 loops.
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</p><p>
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Sun released patches for Solaris 2.6, 8, and 9. The patch for Solaris 7
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has not been released yet.
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</p><p>
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The patch revision for 2.6 is 105181-34
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for 8 is 108528-19 and for 9 is 112233-04
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</p><p>
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After the install of these patches it is recommended to reconfigure
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and rebuild samba.
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</p><p>Thanks to Joe Meslovich for reporting</p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="winbind-solaris9"></a>Winbind on Solaris 9</h3></div></div><div></div></div><p>
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Nsswitch on Solaris 9 refuses to use the winbind nss module. This behavior
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is fixed by Sun in patch 113476-05 which as of March 2003 is not in any
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roll-up packages.
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</p></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="compiling.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="Appendixes.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="Other-Clients.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 36. How to compile SAMBA </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 38. Samba and other CIFS clients</td></tr></table></div></body></html>
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