Can't figure out how to automount with subdirectories Post: 302307467

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Operating Systems Solaris Can't figure out how to automount with subdirectories Post 302307467 by srhadden on Wednesday 15th of April 2009 12:35:43 PM

04-15-2009

Registered User

I was trying to mimic how our overseas group mounted the paths to some GNU tools, because we are replicating the environment at our site.

I found syntax that allows me to do what seems like a hierarchical mount, but maybe it isn't quite.

The syntax in my "auto_gnu" file goes like this.

gnu <path to remote share> /bin <path to remote bin share> /lib <path to remote lib share>

This is ALL on the same line. And it works!

The reason WHY this was done is because /gnu is where the top level gnu tools are, and "bin" is just an empty folder to use as a mount point. What they did at our remote site was use these environment variable options like "$CPU" and "$ARCH" (something like that - Look it up, it is part of the automount docs) such that the automounter will mount the bin directory based on the cpu and architecture. So, if you login to a sparc, it automounts sparc-bin to /gnu/bin, if you login to linux, it automounts linux-bin to the /gun/bin directory. So the directory structure looks the same from all architectures, and the automounter is determing which platform bin directory to mount to /gnu/bin.

It is very convoluted. I mainly wanted to learn about the automounter and try to get this pseudo hierarchical mount working, which I did with the above syntax.

Thanks

srhadden

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LEARN ABOUT NETBSD

fincore

FINCORE(1)						    BSD General Commands Manual 						FINCORE(1)

NAME

     fincore -- query in-core status of file pages

SYNOPSIS

     fincore [-qs] file ...

DESCRIPTION

     The fincore utility queries and displays in-core status of specified files.

     Note that the result can already be stale when being output due to other activities in the system.  Thus it should be used only for advisory
     purposes.

     The fincore utility accepts the following options.

     -q        The quiet mode.	Outputs nothing unless the file has in-core pages.

     -s        The summary mode.  Only shows number of pages.

EXAMPLES

     The following example shows that /bin/cat and /bin/cp are fully cached in-core while the other executables are not in-core.  numbers shown in
     the default output are page indexes in the file of each in-core pages.

     % fincore /bin/c*
     /bin/cat: 0 1 2 3
     /bin/chio:
     /bin/chmod:
     /bin/cp: 0 1 2 3 4 5
     /bin/cpio:
     /bin/csh:
     % fincore -s /bin/c*
     /bin/cat: 4 / 4 in-core pages (100.00%)
     /bin/chio: 0 / 5 in-core pages (0.00%)
     /bin/chmod: 0 / 3 in-core pages (0.00%)
     /bin/cp: 6 / 6 in-core pages (100.00%)
     /bin/cpio: 0 / 36 in-core pages (0.00%)
     /bin/csh: 0 / 41 in-core pages (0.00%)

SEE ALSO

     mincore(2)

AUTHORS

     The fincore utility is written by YAMAMOTO Takashi.

CAVEATS

     The concept of page cache is an implementation detail of the kernel.  The fincore utility works using some assumptions on the current imple-
     mentation.  Thus it might stop working in a future version of NetBSD.

BUGS

     The amount of CPU time the current implementation of fincore utility would take is roughly proportional to the file sizes.  Ideally it should
     be proportional to the number of in-core pages.

BSD
								  January 5, 2012							       BSD