Class: Procview::Options

Inherits:
OpenStruct
  • Object
show all
Defined in:
lib/procview/options.rb

Constant Summary collapse

SYSRE = 
%r{^/(usr/(lib64|share|bin|sbin|tmp)|lib64|proc|etc|usr|var|sbin|bin|dev|selinux|$)}
DEFAULTS = 
{
  buckets: {},
  calls: false,
  debug: false,
  digits: 3,
  quiet: false,
  raw: false,
  missing: true,
  sys: true,
  counts: false,
  variances: false
}

Instance Method Summary collapse

Constructor Details

#initialize(argv) ⇒ Options 



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# File 'lib/procview/options.rb', line 25

def initialize argv
  super(DEFAULTS)

  OptionParser.new do |o|
    o.banner = "usage: #{o.program_name} [options] [-- command [args...]]"
    o.separator "Analyze a Linux strace file. Options (v#{VERSION}):"

    o.on('-f', '--file FILE', "Analyze strace file only") do |f|
      self.filename = f
    end
    o.on("--counts", "Show counts (default: #{self.counts})") do |c|
      self.counts = c
    end
    o.on("--variances", "Show standard deviations (default: #{self.variances})") do |c|
      self.variances = c
    end
    o.on('--digits NUM', Integer, "Number of digits (default: #{self.digits})") do |d|
      self.digits = d
    end
    o.on('-p', '--pid PID', Integer, "Process ID to examine") do |p|
      self.pid = p
    end
    o.on('-s', '--system', "Summarize system files") do
      self.buckets[:'System files'] = [SYSRE, Stats.new]
    end
    o.on('--sum [name=]pattern', "Summarize patterns") do |sum|
      if sum =~/^(\w+)=(.*)$/
        self.buckets[$1] = [Regexp.new($2), Stats.new]
      else
        self.buckets[self.buckets.keys.size] = [Regexp.new(sum), Stats.new]
      end
    end
    o.on('-F', "Summarize all disk file activity") do
      self.buckets[:'All files'] = [%r{/.*}, Stats.new]
    end
    o.on('-c', "--calls", "Show calls and signals (default: #{self.calls})") do |c|
      self.calls = c
    end
    o.on('-m', "--[no-]missing", "Ignore missing files in open() and stat() calls (default: #{self.missing})") do |m|
      self.missing = m
    end
    o.on('-q', '--quiet', "Quiet - no errors (default: #{self.quiet})") do |q|
      self.quiet = q
    end
    o.on('-r', '--raw', "Raw trace - assume cwd and stdio (default: #{self.raw})") do |r|
      self.raw = r
    end
    o.on('-d', '--debug', "Debug - write trace to /tmp (default: #{self.debug})") do |d|
      self.debug = d
    end
    o.on_tail( '-?', '--help', 'Display this screen' ) do
      STDERR.puts o
      exit
    end
    o.parse!(argv) rescue (STDERR.puts "#{o.program_name}: #{$!}\n#{o.to_s}"; exit)
    if self.pid.nil? and self.filename.nil? and argv.size == 0
      STDERR.puts o.help
      exit 2
    end
  end
end