[Mono-bugs] [Bug 486904] New: System.Net.NetworkInformation.Ping throws InvalidOperationException "Process has not been started" on OSX

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https://bugzilla.novell.com/show_bug.cgi?id=486904


           Summary: System.Net.NetworkInformation.Ping throws
                    InvalidOperationException "Process has not been
                    started" on OSX
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.2.x
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: System
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: rrussell at franticfilms.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.0.7)
Gecko/2009021910 Firefox/3.0.7 (.NET CLR 3.5.30729)

The problem occurs when calling Send(). Here's some source/sudo code that
reproduces the problem.

string machineName = "some_machine";
Ping ping = new Ping();
PingReply reply = ping.Send( machineName, 500 ); // throws the exception


I took a look through the Mono source for the Ping class, and I'm assuming that
the SendUnprivileged option is being used because it uses an actual ping
Process. I think the problem might be in the BuildPingArgs function, because
the arguments it's using are from the Linux version of ping. The OSX version
has different usage options:

usage: ping [-AaDdfnoQqRrv] [-c count] [-i wait] [-l preload] [-M mask | time]
            [-m ttl] [-p pattern] [-S src_addr] [-s packetsize]
            [-t timeout] [-z tos] host
       ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]
            [-M mask | time] [-m ttl] [-p pattern] [-S src_addr]
            [-s packetsize] [-T ttl] [-t timeout] [-z tos] mcast-group


Reproducible: Always

Steps to Reproduce:
1. See source above. The line that sends the ping results in the exception.
Actual Results:  
InvalidOperationException "Process has not been started"

Expected Results:  
Not throw an exception, and return the appropriate PingReply result.

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