Passing Global Shell variables to awk Post: 302847197

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LEARN ABOUT NETBSD

perfused

PERFUSED(8)						    BSD System Manager's Manual 					       PERFUSED(8)

NAME

     perfused -- PUFFS Enabled Relay to FUSE Daemon

SYNOPSIS

     perfused [-fs] [-d types] [-i -fd]

DESCRIPTION

     perfused is a userland daemon implementing the FUSE kernel level API.  It creates a /dev/fuse socket for FUSE file system daemons to connect
     to.  perfused takes care of mounting the file system using puffs(3).

     When the kernel sends a puffs(3) operation for the mounted file system, perfused will translate it into a FUSE request, and will send it to
     the file system daemon through /dev/fuse.	The FUSE reply will be converted back into a puffs(3) reply and will be relayed to the kernel.

     FUSE file system daemons must be modified so that they request perfused to perform the mount(2) system call instead of doing it on their own.
     This is done by replacing mount(2) and the open(2) calls for /dev/fuse with perfuse_mount() and perfuse_open(), respectively, in their
     sources.  libperfuse(3) must be used at link time.  Most FUSE file system daemons use libfuse and will work unmodified, provided the modifi-
     cation is done in libfuse itself .

     The following options are available:

     -d types	 Print additional debug information.  types is a comma-separated list of information types to print:

		 puffs	 Display PUFFS requests and replies.

		 fuse	 Display FUSE requests and replies.

		 dump	 Dump content of FUSE frames.

		 fh	 Display file handle activity.

		 reclaim
			 Display reclaim activity.

		 readdir
			 Display readdir activity.

		 requeue
			 Display requeue activity.

		 sync	 Display dirty flags and sync operations.

     -f 	 Do not fork, but stay in the foreground.

     -i fd	 Do not open /dev/fuse but use the socket available from the file descriptor fd.  This is used when perfused is started from
		 libperfuse(3).

     -s 	 Enable debug output only when receiving SIGINFO.

SIGNALS

     SIGINFO
	     If the -s flag was used, toggle debug output.  Do nothing otherwise.

     SIGUSR1
	     Toggle FUSE operation dump on and off.  When toggling off, the trace is is stored in /var/run/perfuse-xxx.trace (xxx is the filesys-
	     tem mount point).

ERRORS

     The program logs to the syslog daemon as facility ``daemon''.  For detailed debugging use the -d (debug) option.

SEE ALSO

     mount(2), perfuse_mount(3), puffs(4)

AUTHORS

     The program was written by Emmanuel Dreyfus <manu@NetBSD.org>.

BUGS

     When perfused runs in the foreground (using the -f flag), some processes using the FUSE file system will sometime hang on 'uvn_fp2'.

BSD
								 January 29, 2012							       BSD