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><H1
><A
NAME="PORTABILITY">Chapter 21. Portability</H1
><P
>Samba works on a wide range of platforms but the interface all the
platforms provide is not always compatible. This chapter contains
platform-specific information about compiling and using samba.</P
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="AEN3119">21.1. HPUX</H1
><P
>HP's implementation of supplementary groups is, er, non-standard (for
hysterical reasons). There are two group files, /etc/group and
/etc/logingroup; the system maps UIDs to numbers using the former, but
initgroups() reads the latter. Most system admins who know the ropes
symlink /etc/group to /etc/logingroup (hard link doesn't work for reasons
too stupid to go into here). initgroups() will complain if one of the
groups you're in in /etc/logingroup has what it considers to be an invalid
ID, which means outside the range [0..UID_MAX], where UID_MAX is (I think)
60000 currently on HP-UX. This precludes -2 and 65534, the usual 'nobody'
GIDs.</P
><P
>If you encounter this problem, make sure that the programs that are failing
to initgroups() be run as users not in any groups with GIDs outside the
allowed range.</P
><P
>This is documented in the HP manual pages under setgroups(2) and passwd(4).</P
></DIV
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><H1
CLASS="SECT1"
><A
NAME="AEN3124">21.2. SCO Unix</H1
><P
>
If you run an old version of SCO Unix then you may need to get important
TCP/IP patches for Samba to work correctly. Without the patch, you may
encounter corrupt data transfers using samba.</P
><P
>The patch you need is UOD385 Connection Drivers SLS. It is available from
SCO (ftp.sco.com, directory SLS, files uod385a.Z and uod385a.ltr.Z).</P
></DIV
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><H1
CLASS="SECT1"
><A
NAME="AEN3128">21.3. DNIX</H1
><P
>DNIX has a problem with seteuid() and setegid(). These routines are
needed for Samba to work correctly, but they were left out of the DNIX
C library for some reason.</P
><P
>For this reason Samba by default defines the macro NO_EID in the DNIX
section of includes.h. This works around the problem in a limited way,
but it is far from ideal, some things still won't work right.</P
><P
>
To fix the problem properly you need to assemble the following two
functions and then either add them to your C library or link them into
Samba.</P
><P
>
put this in the file <TT
CLASS="FILENAME"
>setegid.s</TT
>:</P
><P
><PRE
CLASS="PROGRAMLISTING"
> .globl _setegid
_setegid:
moveq #47,d0
movl #100,a0
moveq #1,d1
movl 4(sp),a1
trap #9
bccs 1$
jmp cerror
1$:
clrl d0
rts</PRE
></P
><P
>put this in the file <TT
CLASS="FILENAME"
>seteuid.s</TT
>:</P
><P
><PRE
CLASS="PROGRAMLISTING"
> .globl _seteuid
_seteuid:
moveq #47,d0
movl #100,a0
moveq #0,d1
movl 4(sp),a1
trap #9
bccs 1$
jmp cerror
1$:
clrl d0
rts</PRE
></P
><P
>after creating the above files you then assemble them using</P
><P
><B
CLASS="COMMAND"
>as seteuid.s</B
></P
><P
><B
CLASS="COMMAND"
>as setegid.s</B
></P
><P
>that should produce the files <TT
CLASS="FILENAME"
>seteuid.o</TT
> and
<TT
CLASS="FILENAME"
>setegid.o</TT
></P
><P
>then you need to add these to the LIBSM line in the DNIX section of
the Samba Makefile. Your LIBSM line will then look something like this:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>LIBSM = setegid.o seteuid.o -ln</PRE
></P
><P
>
You should then remove the line:</P
><P
><PRE
CLASS="PROGRAMLISTING"
>#define NO_EID</PRE
></P
><P
>from the DNIX section of <TT
CLASS="FILENAME"
>includes.h</TT
></P
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