ramfs man page on Plan9

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RAMFS(4)							      RAMFS(4)

       ramfs  - memory file system

       ramfs [ -Dipsu ] [ -m mountpoint ] [ -S srvname ]

       Ramfs  starts  a process that mounts itself (see bind(2)) on mountpoint
       (default /tmp).	The ramfs process implements a	file  tree  rooted  at
       dir, keeping all files in memory.  Initially the file tree is empty.

       The -D option enables a trace of general debugging messages.

       The  -i flag tells ramfs to use file descriptors 0 and 1 for its commu‐
       nication channel rather than create a pipe.  This makes it possible  to
       use  ramfs as a file server on a remote machine: the file descriptors 0
       and 1 will be the network channel from ramfs to the client machine.

       The -p flag causes ramfs to make its memory `private' (see proc(3))  so
       that its files are not accessible through the debugging interface.

       The  -s	(-S)  flag  causes  ramfs  to  post  its channel on /srv/ramfs
       (/srv/srvname) rather than mounting it on mountpoint, enabling multiple
       clients	to  access  its	 files.	 However, it does not authenticate its
       clients and its implementation of groups is simplistic,	so  it	should
       not be used for precious data.

       The  -u option permits ramfs to consume as much memory as needed; with‐
       out it, ramfs will limit its consumption to some arbitrary amount, cur‐
       rently 768MB (enough to hold a CD image).

       This  program  is  useful  mainly as an example of how to write a user-
       level file server.  It can also be  used	 to  provide  high-performance
       temporary files.



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