Date: Thu, 27 Mar 1997 21:10:34 +1100 (EST) From: Mark Hannon <mark@seeware.DIALix.oz.au> To: joerg_wunsch@uriah.heep.sax.de, current@freebsd.org, deischen@iworks.InterWorks.org Cc: support@xinside.com Subject: SOLVED: 2.2-RELEASE, dtmail stopped working Message-ID: <199703271010.VAA00461@putte.seeware.DIALix.oz.au>
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Hi, A week ago I reported a problem with Xinside's dtmail client not starting under 2.2-RELEASE. The same program had worked under 2.1.[567] and 2.2-GAMMA. The error message was "Mailer has not been properly installed and cannot be run because the execution group is incorrectly set" dtmail is sgid bin and the mail spool permissions are set to 775. After some hints from Joerg I managed to trace the execution on both a 2.2 and 2.1.7 kernel (this required the removal of a check which dissallows ktrace in an suid/sgid process). Upon examination I saw that the failure point in 2.2 was in a failing call to the setgid call. The call failed with a permission error in 2.2 but not in 2.1.7. Further digging showed that /sys/sys/unistd.h has changed in 2.2 and says: #ifdef _NOT_AVAILABLE #define _POSIX_SAVED_IDS /* saved set-user-ID and set-group-ID */ #endif The code in /sys/kern/kern_prot.c checks for _POSIX_SAVED_IDS before including the code to allow setgid. I could not find a #def _NOT_AVAILABLE in the include files. A recompile of a new kernel with the unistd.h file from 2.2-GAMMA has solved my problems. I have submitted a PR on this. Regards/Mark
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