Open Mash Cross Reference
mash/tcl/common/mash-system.tcl

   # mash-system.tcl --
   #
   #   This file contains useful routines for accessing system specific
   #   information (such as CPU load, free disk space etc)
   #
   # Copyright (c) 1996-2002 The Regents of the University of California.
   # All rights reserved.
   #
   # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #
  # A. Redistributions of source code must retain the above copyright notice,
  #    this list of conditions and the following disclaimer.
  # B. Redistributions in binary form must reproduce the above copyright notice,
  #    this list of conditions and the following disclaimer in the documentation
  #    and/or other materials provided with the distribution.
  # C. Neither the names of the copyright holders nor the names of its
  #    contributors may be used to endorse or promote products derived from this
  #    software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
  # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  #
  # @(#) $Header: /usr/mash/src/repository/mash/mash-1/tcl/common/mash-system.tcl,v 1.1 2002/05/28 19:57:53 weitsang Exp $
  Class MashSystem
  
  #-----------------------------------------------------------------------
  # Method:
  #   MashSystem get_load
  # Description:
  #   Call uptime and return the current load on this machine.
  #-----------------------------------------------------------------------
  
  MashSystem proc get_load {} {
      set v [catch {open "|uptime"} fd]
      if { $v != 0 } {
          return 0
      }
      set l [gets $fd]
      close $fd
      # Format:
      # FIXME load averages: 0.00, 0.00, 0.00
      set n [llength $l]
      set avg [string trim [lindex $l [expr $n - 3]] ,]
      return $avg
  }