[5874] in Athena Bugs
UUCP and MaxGrade (comp.bugs.4bsd)
daemon@ATHENA.MIT.EDU (Jonathan I. Kamens)
Tue Aug 28 10:36:34 1990
Date: Tue, 28 Aug 90 10:36:23 -0400
From: Jonathan I. Kamens <jik@PIT-MANAGER.MIT.EDU>
To: bugs@ATHENA.MIT.EDU
In article <3949@auspex.auspex.com>, guy@auspex.auspex.com (Guy Harris) writes:
|> Subject: UUCP doesn't properly negotiate MaxGrade with some HDB UUCPs
|> Index: usr.bin 4.3BSD-tahoe
|>
|> Description:
|> While the HDB shipped by AT&T as part of S5R3.x doesn't support
|> the "MaxGrade" mechanism - that is, the mechanism that lets you
|> specify, in the "Systems"/"L.sys" file, the maximum grade of
|> work to be transferred at particular times of the day - Peter
|> Honeyman has modified HDB to do so, and some vendors (including
|> Sun) have picked up these patches.
|>
|> Two UUCPs negotiate the MaxGrade by sending their idea of the
|> MaxGrade in the initial connection message. The 4.3 UUCP sends
|> it with both a "-p" and a "-vgrade=" flag; Peter's patches to
|> HDB send only the "-vgrade=" flag.
|>
|> The 4.3 UUCP doesn't properly handle the "-vgrade=" flag, so
|> while it can properly negotiate MaxGrade with other 4.3 UUCPs
|> (since it does handle the "-p" flag which the 4.3 UUCP sends),
|> it can't properly negotiate it with HDB with Peter's patches.
|> Repeat-By:
|> Inspect the code. (There is a scenario that will reproduce it,
|> but I forget precisely what it is and I'm too lazy to
|> reconstruct it.)
|> Fix:
|> *** cico.c.orig Thu Aug 23 11:17:34 1990
|> --- cico.c Thu Aug 23 11:18:51 1990
|> ***************
|> *** 446,452 ****
|> DEBUG(4, "MaxGrade set to %c\n", MaxGrade);
|> break;
|> case 'v':
|> ! if (strncmp(p, "grade", 5) == 0) {
|> p += 6;
|> MaxGrade = DefMaxGrade = *p++;
|> DEBUG(4, "MaxGrade set to %c\n", MaxGrade);
|> --- 446,452 ----
|> DEBUG(4, "MaxGrade set to %c\n", MaxGrade);
|> break;
|> case 'v':
|> ! if (strncmp(++p, "grade=", 6) == 0) {
|> p += 6;
|> MaxGrade = DefMaxGrade = *p++;
|> DEBUG(4, "MaxGrade set to %c\n", MaxGrade);
Jonathan Kamens USnail:
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