ngrep: additional flag prevents segfault

[dch]

Known issue on BSD platforms since v1.4.4 and
configure produces a warning if not present:

https://github.com/jpr5/ngrep/commit/e29fc29

NB ngrep seems to have moved to git at
https://github.com/jpr5/ngrep but I didn't get
master to compile successfully so I left it out.

[tleyden]

I just did a "brew update" and I'm still seeing the issue:

$ sudo ngrep -W byline -d lo0 port 4984
interface: lo0 (127.0.0.0/255.0.0.0)
*crash*

Should this have been fixed by 6c520d7?

[dch]

From: Traun Leyden [email protected](mailto:[email protected])
Reply: Homebrew/homebrew [email protected](mailto:[email protected])
Date: 12. Juni 2014 at 18:24:11
To: Homebrew/homebrew [email protected](mailto:[email protected])
Cc: Dave Cottlehuber [email protected](mailto:[email protected])
Subject: Re: [homebrew] ngrep: additional flag prevents segfault (#29665)

sudo ngrep -W byline -d lo0 port 4984

Building from source via HOMEBREW_BUILD_FROM_SOURCE=1 brew install -v ngrep
works for me, but running the bottled version does not, via lldb:

(lldb) run
Process 8526 launched: '/usr/local/bin/ngrep' (x86_64)
interface: lo0 (127.0.0.0/255.0.0.0)
Process 8526 stopped

• thread Git won't brew ln #1: tid = 0x4712c, 0x00007fff8bbecece libsystem_c.dylibflockfile + 22, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x48) frame #0: 0x00007fff8bbecece libsystem_c.dylibflockfile + 22
  libsystem_c.dylib`flockfile + 22:
  -> 0x7fff8bbecece: cmpq %r14, 0x48(%rdi)
  0x7fff8bbeced2: je 0x7fff8bbecef2 ; flockfile + 58
  0x7fff8bbeced4: addq $0x8, %rdi
  0x7fff8bbeced8: callq 0x7fff8bc322e2 ; symbol stub for: pthread_mutex_lock

Traun - can you build your own from source with the command above, and then re-try?

If it still fails, run lldb -- ngrep -W byline -d lo0 port 4984 and type run maybe we will see something useful.

A+
Dave