MOUNT_PORTALFS(8) System Manager's Manual MOUNT_PORTALFS(8) NAME mount_portalfs -- mount the portal daemon SYNOPSIS mount_portalfs [-o options] /etc/portal.conf mount_point DESCRIPTION The mount_portalfs utility attaches an instance of the portal daemon to the global file system namespace. The conventional mount point is /p. This command is normally executed by mount(8) at boot time. The options are as follows: -o Options are specified with a -o flag followed by a comma separated string of options. See the mount(8) man page for possible options and their meanings. The portal daemon provides an open service. Objects opened under the por- tal mount point are dynamically created by the portal daemon according to rules specified in the named configuration file. Using this mechanism al- lows descriptors such as sockets to be made available in the file system namespace. The portal daemon works by being passed the full pathname of the object be- ing opened. The daemon creates an appropriate descriptor according to the rules in the configuration file, and then passes the descriptor back to the calling process as the result of the open system call. NAMESPACE By convention, the portal daemon divides the namespace into sub-namespaces, each of which handles objects of a particular type. The following sub-namespaces are currently implemented: tcplisten, tcp and fs. The tcplisten namespace takes a slash separated hostname and port and creates a TCP/IP socket bound to the given hostname-port pair. The host- name may be specified as "ANY" to allow any other host to connect to the socket. A port number of 0 will dynamically allocate a port, this can be discovered by calling getsockname(2) with the returned file descriptor. Privileged ports can only be bound to by the super-user. The tcp namespace takes a hostname and a port (slash separated) and creates an open TCP/IP connection. The fs namespace opens the named file, starting back at the root directory. This can be used to provide a controlled escape path from a chrooted environment. CONFIGURATION FILE The configuration file contains a list of rules. Each rule takes one line and consists of two or more whitespace separated fields. A hash (``#'') character causes the remainder of a line to be ignored. Blank lines are ignored. The first field is a pathname prefix to match against the requested path- name. If a match is found, the second field tells the daemon what type of object to create. Subsequent fields are passed to the creation function. # @(#)portal.conf 5.1 (Berkeley) 7/13/92 tcplisten/ tcplisten tcplisten/ tcp/ tcp tcp/ fs/ file fs/ FILES /p/* SEE ALSO mount(2), unmount(2), fstab(5), mount(8) CAVEATS This file system may not be NFS-exported. HISTORY The mount_portalfs utility first appeared in 4.4BSD. FreeBSD 5.2.1 March 27, 1994 MOUNT_PORTALFS(8)
NAME | SYNOPSIS | DESCRIPTION | NAMESPACE | CONFIGURATION FILE | FILES | SEE ALSO | CAVEATS | HISTORY
Want to link to this manual page? Use this URL:
<https://man.FreeBSD.org/cgi/man.cgi?query=mount_portalfs&sektion=8&manpath=FreeBSD+5.2-RELEASE>