Module: Procview::StraceArgs

Defined in:
lib/procview/straceargs.rb

Constant Summary collapse

STRUCT =

gobble up the largest matching braces

/\A(?<b>{([^{}]|\g<b>)*}),?\s*/

Class Method Summary collapse

Class Method Details

.afds!(args) ⇒ Object 



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# File 'lib/procview/straceargs.rb', line 28

def self.afds! args
    raise "parse error: #{args}" unless args.slice!(/^(\[.*?\]|NULL),?\s*/)
    afd = $~[1]
    return [] if afd.start_with? 'NULL'
    afd.slice(1..-2).split(/\s*,\s*/).map(&:to_i)
end

.epollevents!(args) ⇒ Object 



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# File 'lib/procview/straceargs.rb', line 90

def self.epollevents! args
    raise "parse error: #{args}" unless args.slice! STRUCT
    evs = $~[1].slice(1..-2)
    rex = /{(.*?),\s{u32=(\d+),\su64=(\d+)}},?\s*/
    eva = []
    while ev = evs.slice!(rex)
        eva.push $~[3].to_i
    end
    raise "parse leftover #{evs}" unless evs.empty?
    return eva
end

.fd!(args) ⇒ Object 



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# File 'lib/procview/straceargs.rb', line 23

def self.fd! args
    raise "parse error: #{args}" unless args.slice!(/^(-?\d+),?\s*/)
    $~[1].to_i
end

.flags!(args) ⇒ Object 



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# File 'lib/procview/straceargs.rb', line 102

def self.flags! args
    raise "parse error: #{args}" unless args.slice!(/^\w+=([^,]+),\s*/)
    flags = $~[1].split('|').map{|f| f.to_sym}
    return flags
end

.name!(args) ⇒ Object 



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# File 'lib/procview/straceargs.rb', line 35

def self.name! args
    raise "parse error: #{args}" unless args.slice!(/^"(.*?)",?\s*/)
    return $~[1]
end

.nextcomma!(args) ⇒ Object 



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# File 'lib/procview/straceargs.rb', line 18

def self.nextcomma! args
    raise "parse error: #{args}" unless args.slice!(/^([^,]+),?\s*/)
    $~[1]
end

.op!(args) ⇒ Object 



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# File 'lib/procview/straceargs.rb', line 40

def self.op! args
    raise "parse error: #{args}" unless args.slice!(/^(\w+),?\s*/)
    return $~[1].to_sym
end

.pollfd!(args) ⇒ Object 



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# File 'lib/procview/straceargs.rb', line 12

def self.pollfd! args
    return [] if args.slice!(/^0,\s*/)
    raise "parse error: #{args}" unless args.slice!(/^\[{(.*?)}\],?\s*/)
    $~[1].split(/},{/).map{|m| /^fd=(\d+)/ =~ m; $1.to_i}
end

.sockaddr!(args) ⇒ Object 



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# File 'lib/procview/straceargs.rb', line 45

def self.sockaddr! args
    if args.slice!(/^(0|NULL),?\s*/)
        return nil
    end
    raise "parse error: #{args}" unless args.slice! STRUCT
    soa = $~[1].slice(1..-2)
    if /^
        sa_family=AF_INET,\s*
        sin_port=htons\((?<port>\d+)\),\s*
        sin_addr=inet_addr\("(?<host>.*)"\)
        /x =~ soa
        return "#{host}:#{port}"
    elsif /^
        sa_family=AF_INET6,\s*
        sin6_port=htons\((?<port6>\d+)\),\s*
        inet_pton\(AF_INET6,\s*"(?<host6>.*)",\s*\&sin6_addr\),\s*
        sin6_flowinfo=\d+,\s*sin6_scope_id=\d+
        /x =~ soa
        return "#{host6}:#{port6}"
    elsif /^
        sa_family=AF_FILE,\s*
        path="(?<path>.*)"
        /x =~ soa
        return "file:#{path}"
    elsif /^
        sa_family=AF_LOCAL,\s*
        sun_path="(?<sunpath>.*)"
        /x =~ soa
        return "unix:#{sunpath}"
    elsif /^
        sa_family=AF_NETLINK,\s*
        pid=(?<pid>\d+),\s*
        groups=(?<groups>.*)
        /x =~ soa
        return "netlink:#{pid}:#{groups}"
    elsif /^
        sa_family=AF_UNSPEC,\s*
        sa_data="(?<data>.*)"
        /x =~ soa
        return "unspec:#{data}"
    else
        raise "Invalid sockaddr format: #{soa}"
    end
end