George -
In the latest 2.5.54-bk1 high-res-timers patches, it appears that
nanosleep() is returning 0 (success) and not setting errno when an rqtp
argument is sent that specifies a nsec value < 0 or >= 1000 million. In
this instance, the POSIX System Interfaces doc states that errno is supposed
to be set to EINVAL, and nanosleep should return -1.
In the 2.5.50 high-res-timers patches, behavior was as expected (i.e.,
returned -1 and set errno=EINVAL). Unfortunately, I haven't looked at any
patches since then to know exactly which patch stopped behaving as expected.
A plain 2.5.54-bk1 kernel also behaves as expected (returns -1, sets
errno=EINVAL).
The tests I am using to reproduce this issue are part of the POSIX Test
Suite at http://posixtest.sf.net under
posixtestsuite/conformance/interfaces/nanosleep. 5-1.c (sending -1 nsec),
6-1.c (sending multiple nsec values < 0 and >= 1,000 million), and 10000-1.c
(sending other nsec values < 0 and >= 1,000 million) are failing. I've
included 5-1.c below.
Additional information is below:
kernel used = 2.5.54-bk1
HRT patches applied =
hrtimers-core-2.5.54-bk1-1.0.patch
hrtimers-hrposix-2.5.54-bk1-1.0.patch
hrtimers-i386-2.5.54-bk1-1.0.patch
hrtimers-posix-2.5.54-bk1-1.0.patch
hrtimers-support-2.5.52-1.0.patch
Thanks.
- Julie Fleischer
---- test 5-1.c below (Output was: nanosleep() did not return -1 on failure)/* * Copyright (c) 2002, Intel Corporation. All rights reserved. * Created by: julie.n.fleischer REMOVE-THIS AT intel DOT com * This file is licensed under the GPL license. For the full content * of this license, see the COPYING file at the top level of this * source tree.
* Test that nanosleep() returns -1 on failure. * Simulate failure condition by sending -1 as the nsec to sleep for. */ #include <stdio.h> #include <time.h>
#define PTS_PASS 0 #define PTS_FAIL 1 #define PTS_UNRESOLVED 2
int main(int argc, char *argv[]) { struct timespec tssleepfor, tsstorage; int sleepnsec = -1;
tssleepfor.tv_sec=0; tssleepfor.tv_nsec=sleepnsec; if (nanosleep(&tssleepfor, &tsstorage) == -1) { printf("Test PASSED\n"); return PTS_PASS; } else { printf("nanosleep() did not return -1 on failure\n"); return PTS_FAIL; }
printf("This code should not be executed.\n"); return PTS_UNRESOLVED; }
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