1Problem with recent ANSI compilers 2 3On some systems, including AIX, the compiler quits on the ntp_refclock.c 4file when processing the refclock_report() routine. The problem, which 5is eithre a feature or a bug, has to do with an unwanted promotion of 6the u_char argument to an int and a failure of the compiler to recognize 7the preceding prototype. A workaround is to use ANSI syntax to delare 8the arguments. Since ANSI compilers are not universally available, this 9syntax can't be used in the stock distribution. 10 11(Message # 60: 2884 bytes, New) 12Date: Sat, 19 Aug 1995 13:20:50 -0400 13From: "R. Bernstein" <rocky@panix.com> 14Newsgroups: comp.protocols.time.ntp 15to: mills@udel.edu 16return-receipt-to: rocky@panix.com 17Subject: time and AIX 3.2.5 raw tty bug 18 19This posting isn't strictly about NTP, any program that may stop the 20clock or set the clock backwards is subject to the AIX 3.2.5 bug. 21 22On AIX 3.2.5, there is a bug in the tty driver for a raw device which 23may crash the box under certain conditions: basically a read() on a 24raw tty in effect, a character was read but not as many as specified 25by VMIN when a read timeout occurred. VTIME specifies the timeout. See 26the AIX manual page on termios.h or that include file. for Information 27on VMIN (or MIN) VTIME (or TIME). 28 29A remedy other than to not use raw tty's is to apply patch U435110. 30 31Details of the problem report follow. 32 33> ABSTRACT: 34> IX43779: TRAP IN PSX_TIMEO 35> 36> ORIGINATING DETAILS: 37> Stacktrace shows: 38> IAR: 01460214 posixdd:psx_timeo + 8bf4: ti 4,r12,0x0 39> *LR: 014601a0 posixdd:psx_timeo + 8b80 40> 00212c60: 014604f4 posixdd:psx_timer + 8ed4 41> 00212cc0: 0144b74c ttydd:tty_do_offlevel + 4284 42> 00212d20: 000216fc .i_offlevel + 8c 43> 00212d70: 00021d78 .i_softint + c8 44> 00001004: 00008714 .finish_interrupt + 80 45> 46> RESPONDER SUMMARY: 47> AIX asserted in psx_timeo(). Reason for the assert was that 48> the current time was behind psx_ctime. Since this state 49> can occur when the current time is changed after a character 50> is received but before the VTIME interbyte timer pops, we 51> should not assert on this. 52> 53> RESPONDER CONCLUSION: 54> Removed the requirement that current time > psx_ctime by 55> adding a new L_ntimersub macro that is used instead of the 56> ntimersub macro in time.h. Also added a test for (current 57> time - psx_ctime) being negative, in that case we do not 58> adjust the new timeout. 59> 60> Reported to Correct a PTF in Error: NO 61> Reported as a Highly pervasive problem: NO 62> 63> PE Apar?: NoPE 64> Hiper Apar?: NoHiper 65> Status: CLOSED PER 66> Component Name: AIX V3 FOR RS/6 67> Version: 320 68> Component ID: 575603001 69> Submitted: 94/05/03 70> Closed: 94/05/05 71> ChangeTeam: TX2527 72> 73> APAR FIXED BY: U431696 U432151 U432844 U432870 U432979 74> U433049 U433081 U433459 U433876 U433906 U434598 U434453 75> U434672 U434737 U435110 76 77