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Annotation of embedaddon/ntp/html/hints/aix, revision 1.1.1.1

1.1       misho       1: Problem with recent ANSI compilers
                      2: 
                      3: On some systems, including AIX, the compiler quits on the ntp_refclock.c
                      4: file when processing the refclock_report() routine. The problem, which
                      5: is eithre a feature or a bug, has to do with an unwanted promotion of
                      6: the u_char argument to an int and a failure of the compiler to recognize
                      7: the preceding prototype. A workaround is to use ANSI syntax to delare
                      8: the arguments. Since ANSI compilers are not universally available, this
                      9: syntax can't be used in the stock distribution.
                     10: 
                     11: (Message # 60: 2884 bytes, New)
                     12: Date: Sat, 19 Aug 1995 13:20:50 -0400
                     13: From: "R. Bernstein" <rocky@panix.com>
                     14: Newsgroups: comp.protocols.time.ntp
                     15: to: mills@udel.edu
                     16: return-receipt-to: rocky@panix.com
                     17: Subject: time and AIX 3.2.5 raw tty bug
                     18:  
                     19: This posting isn't strictly about NTP, any program that may stop the
                     20: clock or set the clock backwards is subject to the AIX 3.2.5 bug.
                     21:  
                     22: On AIX 3.2.5, there is a bug in the tty driver for a raw device which
                     23: may crash the box under certain conditions: basically a read() on a
                     24: raw tty in effect, a character was read but not as many as specified
                     25: by VMIN when a read timeout occurred. VTIME specifies the timeout. See
                     26: the AIX manual page on termios.h or that include file. for Information
                     27: on VMIN (or MIN) VTIME (or TIME).
                     28:  
                     29: A remedy other than to not use raw tty's is to apply patch U435110.
                     30:  
                     31: Details 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: