|Summary:||bring back legacy ptys|
|Product:||[Fedora] Fedora||Reporter:||Tom Horsley <horsley1953>|
|Component:||ckermit||Assignee:||Peter Vrabec <pvrabec>|
|Status:||CLOSED RAWHIDE||QA Contact:|
|Fixed In Version:||Doc Type:||Enhancement|
|Doc Text:||Story Points:||---|
|Last Closed:||2005-05-02 08:50:29 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Tom Horsley 2005-04-29 22:18:06 UTC
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050416 Fedora/1.0.3-1.3.1 Firefox/1.0.3 Description of problem: As near as I can tell (without being a kernel expert), you have to rebuild the kernel from source to enable "legacy ptys". I have as least one old no longer supported commercial app I'd like to run, but it needs these old style ptys to work (so I keep an ancient redhat 7.1 box around for it). Redhat also ships at least one app I know of (kermit) where the pty feature simply doesn't work without the legacy pty support (gotcha! :-). If there is a security issue involved, it would be nice for this to be available as a boot option rather than having to rebuild the kernel. Version-Release number of selected component (if applicable): kernel-2.6.11-1.14_FC3 How reproducible: Always Steps to Reproduce: 1. One example that demonstrates this is to make an attempt to use any feature of kermit (such as the ssh command) that trys to run a subprocess in a pty. Actual Results: kermit doesn't print an error, but also doesn't work. If you run it under strace you can see it trying various forms of pty access. Expected Results: It should work :-). (Actually, kermit does have ifdefs to make it use the openpty library, so I have built a working version of kermit from the source downloaded from columbia's kermit project - perhaps redhat should adjust their kermit build as well if legacy ptys aren't gonna come back). Additional info:
Comment 1 Dave Jones 2005-05-01 07:52:20 UTC
eventually, these will even go away upstream. Yes, there are security concerns, among other problems, and reenabling them isn't an option. reassigning to kermit maintainer.
Comment 2 Tom Horsley 2005-05-01 15:16:32 UTC
Created attachment 113908 [details] Patch I used to build working kermit I don't recommend this as an official fix to build a working kermit (I just hacked on the redhat9 target rather than making a new target for enterprise/fedora), but it did build a kermit which seems to work on my FC3 system.
Comment 3 Peter Vrabec 2005-05-02 08:50:29 UTC
Add -DHAVE_PTMX to KFLAGS in ckermit.spec. It helps me.
Comment 4 Tom Horsley 2005-05-02 22:00:59 UTC
If it works, it works, but I will just mention that using the openpty library seems like it would be less likely to break if ptys change again, since (one would hope) the openpty lib would remain compatible even if the details of ptys didn't.