Provided by: umview_0.8.2-1ubuntu2_amd64 bug

NAME
       mstack - networking stack selection


SYNOPSIS
       mstack [-hv] [-o protocol list] stack_mountpoint command


DESCRIPTION
       In  View-OS  multiple networking stacks are available to processes at the same time. View-OS supports the
       msocket(2) system call.  mstack defines the default stack (for each address family)  that  is  used  when
       msocket  refers  to a NULL pathname for its stack.  mstack provides also a backward compatibility for all
       the programs using the obsolete socket(2) system call.  The stack mountpoint  identifies  the  stack.  In
       ViewOS it is the mountpoint where the stack was mounted (by mount(2)(8).  In fact the call:
       "socket(domain,type,protocol)"
       is equivalent to:
       "msocket(NULL,domain,type protocol)"
       mstacks  changes  the  default  stack  for  the  desired  protocol  families and executes the command (by
       execve(2)).


OPTIONS
       -h  prints the mstack command usage

       -v  sets the verbose mode on

       -o  defines the list of protocols. Without a -o option,  mstack  redefines  the  default  stack  for  all
           protocols  families.   The  list  of  protocols  may  include  the  a comma separated sequence of the
           following items: all, unix (or simply u), ipv4 (4), ipv6 (6), netlink (n), packet (p), bluetooth (b),
           irda  (i),  ip (which include all ip related protocols ipv4, ipv6, netlink and packet), #n where n is
           the number of protocol.  Each item can be prefixed by + or - to specify whether the protocol/group of
           protocols must be added or removed from the set.


EXAMPLES
       mstack /dev/net/lwip ip addr
              lists the address managed by the stack mounted on /dev/net/lwip.

       exec mstack /dev/net/null bash
              disables the standard stack in a new bash (which overcomes the current one).

       mstack -o ip /dev/net/lwip bash
              starts  a  new  bash  which  uses  the stack /dev/net/lwip for ipv4 and ipv6 but not for the other
              protocols.

       mstack -o -unix /dev/net/lwip bash
              starts a new bash which uses the stack /dev/net/lwip for all protocols but AF_UNIX.

       mstack -o +ip,-ipv6 /dev/net/lwip bash
              starts a new bash which uses the stack /dev/net/lwip for ipv4, netlink, packet but not ipv6.


SEE ALSO
       umview(1), kmview(1), msocket(3), umnetnative(9), umnetnull(9), umnetlwipv6(9), unix(7), ip(7),  ipv6(7),
       netlink(7), packet(7).


AUTHORS
       View-OS  is  a  project  of the Computer Science Department, University of Bologna. Project Leader: Renzo
       Davoli.
       <http://www.sourceforge.net/projects/view-os>

       Howto's and further information can be found on the project wiki <wiki.virtualsquare.org>.