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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2021-02-17 13:35:19 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2021-06-15 10:42:11 -0300
commit47f24c21ee38701ae275aa9e451f70fa3e77478c (patch)
treeb4cc52206173fb2ed427a1e797769d12369a89ad /io/utime.h
parent8af344feb5ae3e6e3374a6cf2175b44cc904a94e (diff)
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y2038: Add support for 64-bit time on legacy ABIs
A new build flag, _TIME_BITS, enables the usage of the newer 64-bit time symbols for legacy ABI (where 32-bit time_t is default). The 64 bit time support is only enabled if LFS (_FILE_OFFSET_BITS=64) is also used. Different than LFS support, the y2038 symbols are added only for the required ABIs (armhf, csky, hppa, i386, m68k, microblaze, mips32, mips64-n32, nios2, powerpc32, sparc32, s390-32, and sh). The ABIs with 64-bit time support are unchanged, both for symbol and types redirection. On Linux the full 64-bit time support requires a minimum of kernel version v5.1. Otherwise, the 32-bit fallbacks are used and might results in error with overflow return code (EOVERFLOW). The i686-gnu does not yet support 64-bit time. This patch exports following rediretions to support 64-bit time: * libc: adjtime adjtimex clock_adjtime clock_getres clock_gettime clock_nanosleep clock_settime cnd_timedwait ctime ctime_r difftime fstat fstatat futimens futimes futimesat getitimer getrusage gettimeofday gmtime gmtime_r localtime localtime_r lstat_time lutimes mktime msgctl mtx_timedlock nanosleep nanosleep ntp_gettime ntp_gettimex ppoll pselec pselect pthread_clockjoin_np pthread_cond_clockwait pthread_cond_timedwait pthread_mutex_clocklock pthread_mutex_timedlock pthread_rwlock_clockrdlock pthread_rwlock_clockwrlock pthread_rwlock_timedrdlock pthread_rwlock_timedwrlock pthread_timedjoin_np recvmmsg sched_rr_get_interval select sem_clockwait semctl semtimedop sem_timedwait setitimer settimeofday shmctl sigtimedwait stat thrd_sleep time timegm timerfd_gettime timerfd_settime timespec_get utime utimensat utimes utimes wait3 wait4 * librt: aio_suspend mq_timedreceive mq_timedsend timer_gettime timer_settime * libanl: gai_suspend Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'io/utime.h')
-rw-r--r--io/utime.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/io/utime.h b/io/utime.h
index c7612d0..1a645a3 100644
--- a/io/utime.h
+++ b/io/utime.h
@@ -46,10 +46,21 @@ struct utimbuf
/* Set the access and modification times of FILE to those given in
*FILE_TIMES. If FILE_TIMES is NULL, set them to the current time. */
+#ifndef __USE_TIME_BITS64
extern int utime (const char *__file,
const struct utimbuf *__file_times)
__THROW __nonnull ((1));
+#else
+# ifdef __REDIRECT_NTH
+extern int __REDIRECT_NTH (utime, (const char *__file,
+ const struct utimbuf *__file_times),
+ __utime64);
+# else
+# define utime __utime64
+# endif
+#endif
+
__END_DECLS
#endif /* utime.h */