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33 .\" @(#)mount_portal.8 8.3 (Berkeley) 3/27/94
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41 .Nd mount the portal daemon
50 command attaches an instance of the portal daemon
51 to the global filesystem namespace.
52 The conventional mount point is
55 This command is normally executed by
59 The options are as follows:
60 .Bl -tag -width indent
62 Options are specified with a
64 flag followed by a comma separated string of options.
67 man page for possible options and their meanings.
70 The portal daemon provides an
73 Objects opened under the portal mount point are
74 dynamically created by the portal daemon according
75 to rules specified in the named configuration file.
76 Using this mechanism allows descriptors such as sockets
77 to be made available in the filesystem namespace.
79 The portal daemon works by being passed the full pathname
80 of the object being opened.
81 The daemon creates an appropriate descriptor according
82 to the rules in the configuration file, and then passes the descriptor back
83 to the calling process as the result of the open system call.
85 By convention, the portal daemon divides the namespace into sub-namespaces,
86 each of which handles objects of a particular type.
88 The following sub-namespaces are currently implemented:
95 namespace takes a slash separated hostname and port and creates a TCP/IP
96 socket bound to the given hostname-port pair.
98 specified as "ANY" to allow any other host to connect to the socket.
100 port number of 0 will dynamically allocate a port, this can be
101 discovered by calling
103 with the returned file descriptor.
104 Privileged ports can only be bound to
108 namespace takes a hostname and a port (slash separated) and
109 creates an open TCP/IP connection.
112 namespace opens the named file, starting back at the root directory.
113 This can be used to provide a controlled escape path from
114 a chrooted environment.
115 .Sh CONFIGURATION FILE
116 The configuration file contains a list of rules.
117 Each rule takes one line and consists of two or more
118 whitespace separated fields.
119 A hash (``#'') character causes the remainder of a line to
120 be ignored. Blank lines are ignored.
122 The first field is a pathname prefix to match
123 against the requested pathname.
124 If a match is found, the second field
125 tells the daemon what type of object to create.
126 Subsequent fields are passed to the creation function.
128 # @(#)portal.conf 5.1 (Berkeley) 7/13/92
129 tcplisten/ tcplisten tcplisten/
134 .Bl -tag -width /p/* -compact
145 utility first appeared in
148 This filesystem may not be NFS-exported.