[ksh93-integration-discuss] Re: Minor nit in libast/common/features/fs ...

[Glenn Fowler]

FS_default is only used when struct stat . st_fstype is not provided
its provided on solaris so its not a problem

however, it is problematic for information to be hidden in files that
must be parsed, well-documented or not

On Mon, 26 Jun 2006 00:55:41 +0200 Roland Mainz wrote:
> ----

> While crawling through the AST sources I found the following line in
> "libast/common/features/fs":
> -- snip --
> #define FS_default      "ufs"
> -- snip --

> This may be only partially correct (since Solaris may switch to "zfs" as
> default OS in the near future (and there are other alternatives such as
> "qfs", too)). default_fs(4) in Solaris says the following:
> -- snip --
> File Formats                                        default_fs(4)

> NAME
>   default_fs, fs - specify the default file  system  type  for
>   local or remote file systems

> DESCRIPTION
>   When file system administration commands have both  specific
>   and  generic  components  (for  example, fsck(1M)), the file
>   system type must be  specified.  If  it  is  not  explicitly
>   specified  using the -F FSType command line option, the gen-
>   eric command looks in /etc/vfstab in order to determine  the
>   file  system type, using the supplied raw or block device or
>   mount point.  If the file system type can not be  determined
>   by  searching  /etc/vfstab, the command will use the default
>   file system type  specified  in  either  /etc/default/fs  or
>   /etc/dfs/dfstypes,  depending  on whether the file system is
>   local or remote.

>   The  default  local  file  system  type  is	specified   in
>   /etc/default/fs  by  a  line  of  the form LOCAL=fstype (for
>   example, LOCAL=ufs). The default remote file system type  is
>   determined by the first entry in the /etc/dfs/fstypes file.

>   File system administration commands will  determine  whether
>   the  file  system is local or remote by examining the speci-
>   fied device name.  If the device   name  starts  with  ``/''
>   (slash),  it  is  considered  to  be  local; otherwise it is
>   remote.

>   The default file system types can be changed by editing  the
>   default files with a text editor.

> FILES
>   /etc/vfstab		  list of default parameters for  each
> 			  file system

>   /etc/default/fs	  the default local file system type

>   /etc/dfs/fstypes	  the default remote file system type

> SEE ALSO
>   fsck(1M), fstypes(4), vfstab(4)
> -- snip --

> The only problem is that I can't find a public API to obtain these
> values... does anyone have a clue how this could be done ?

> ----

> Bye,
> Roland

> -- 
>   __ .  . __
>  (o.\ \/ /.o) roland.mainz at nrubsig.org
>   \__\/\/__/  MPEG specialist, C&&JAVA&&Sun&&Unix programmer
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>  (;O/ \/ \O;)