50 lines
1.2 KiB
Text
50 lines
1.2 KiB
Text
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.TH SHR 3
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.SH NAME
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shr \- global mountpoints
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.SH SYNOPSIS
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.nf
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.B bind -a '#σ/share' /dev
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.BI #σ/ share1
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.BI #σc/ share1/service1
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.BI #σc/ share1/service2
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...
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.fi
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.SH DESCRIPTION
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The
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.I shr
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device provides global mountpoints in the form of share directories
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where 9p services can be mounted and unmounted dynamically.
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Effectively, it is a global mountpoint registry that is separate from
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private namespaces.
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.PP
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The
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.I shr
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device exports a mount tree and a control tree. The directories
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in the mount tree
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.BI #σ
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are the share mountpoints themselve and in the control tree
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.BI #σc
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share directories can be created or removed.
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.PP
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To create a new share, create the directory
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.B #σc/myshare
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To mount a service in that share, create the file
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.B #σc/myshare/myserv
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and then write a text string (suitable for
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.IR strtoul ;
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see
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.IR atof (2))
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giving the file descriptor number of an open 9p service. Any process
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with the proper permission may then access
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.B #σ/myshare
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to use the service.
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.PP
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Multiple services can be mounted under a share. New services get
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mounted before old ones. Removing the service file from a share
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removes the service as soon as the last reference goes away.
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.SH SOURCE
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.B /sys/src/9/port/devshr.c
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