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Namespace files describe how to construct a name space from scratch,
an operation normally performed by the newns or addns subroutines
(see auth(2)) which is typically called by init(8). Each line
specifies one name space operation. Spaces and tabs separate arguments
to operations; no quotes or escapes are
recognized. Blank lines and lines with # as the first non–space
character are ignored. Environment variables of the form $name
are expanded within arguments, where name is a UTF string terminated
by white space, a /, or a $.
The known operations and their arguments are:
mount [–abcC] servename old [spec]
bind [–abcC] new old
import [–abc] host [remotepath] mountpoint
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Import remotepath from machine server and attach it to mountpoint.
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cd dir
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Change the working directory to dir.
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unmount [new] old
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Unmount new from old, or everything mounted on old if new is missing.
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clear
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Clear the name space with rfork(RFCNAMEG).
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. path
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Execute the namespace file path. Note that path must be present
in the name space being built.
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The options for bind, mount, and import are interpreted as in
bind(1) and import(4).
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