Wireshark mailing list archives
Re: tshark buffered packet dissection -- no realtime output?
From: Guy Harris <guy () alum mit edu>
Date: Sat, 13 Jan 2018 18:40:04 -0800
On Jan 13, 2018, at 9:19 AM, Eldon <wireshark-users () eldondev com> wrote:
I realize this is a longshot, but my mind immediately went to pipe buffering as well, and a comment on stackoverflow[1] seems to indicate that there are some situations where stdbuf -o0 will not work due to a variety of security measures or alternate configs/stdlibs. Since tshark might have some certain capabilities flags set, I just thought it might be worth checking!
Whatever capability flags are set on tshark would matter only if he's using stdbuf on tshark; if he's using it on curl, the issue would be whether *curl*, not *tshark*, prevented dynamic library injection. And the actual issue is in the low-level code (*very* low-level code) in libwiretap that TShark uses to read the capture; that code isn't using the "standard I/O" libraries, so stdbuf won't affect it. Even if curl *isn't* buffering its output, TShark, in effect, reads it as if it were buffered. ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: https://www.wireshark.org/lists/wireshark-users Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
Current thread:
- tshark buffered packet dissection -- no realtime output? Ralph Schmieder (Jan 12)
- Re: tshark buffered packet dissection -- no realtime output? Lee (Jan 12)
- Re: tshark buffered packet dissection -- no realtime output? Ralph Schmieder (Jan 13)
- Re: tshark buffered packet dissection -- no realtime output? Eldon (Jan 13)
- Re: tshark buffered packet dissection -- no realtime output? Guy Harris (Jan 13)
- Re: tshark buffered packet dissection -- no realtime output? Guy Harris (Jan 13)
- Re: tshark buffered packet dissection -- no realtime output? Ralph Schmieder (Jan 13)
- Re: tshark buffered packet dissection -- no realtime output? Lee (Jan 12)
- Re: tshark buffered packet dissection -- no realtime output? Guy Harris (Jan 13)
- Re: tshark buffered packet dissection -- no realtime output? Guy Harris (Jan 18)