Re: [Lynx-dev] Cancel a goto request

[Thorsten Glaser]

Dixi quod…

>dan d. dixit:
>
>>I know control g will cancel many goto and/or link requests.  But when
>>I get a "waiting for response" it does nothing and that can remain for
>>a very long time.
>
>You can hit “z” there, unless it’s in that weird state where only
>http://www.mirbsd.org/htman/i386/man8/tcpdrop.htm on the connection
>will help (search the mailing list archives for details).

Tonight I found the GNU/Linux (possibly general) equivalent,
out of necessity.

Trying tcpkill from the dsniff package didn’t help (no active packets),
cutter’s also not adequate, but this works:

1. Figure out the pid of the right lynx instance

   $ ps x | fgrep lynx
    3006 pts/9    S+     0:30 lynx

2. Figure out which fd is connected to the hung socket

your pid here
└───────────────────↓
   $ ls -ln /proc/3006/fd
   total 0
   lrwx------ 1 1000 1000 64 Oct  8 23:20 0 -> /dev/pts/9
   lrwx------ 1 1000 1000 64 Oct  8 23:20 1 -> /dev/pts/9
   lrwx------ 1 1000 1000 64 Oct  8 23:20 2 -> /dev/pts/9
   lrwx------ 1 1000 1000 64 Oct  8 23:20 3 -> socket:[3031947]

3. Use a ptrace attach to close it

fd number here                                            pid here
└─────────────────────────────────↓                  ↓───────────┘
   $ gdb --batch -ex 'print close(3)' /usr/bin/lynx 3006


HTH & HAND,
//mirabilos
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