mirror of git://sourceware.org/git/glibc.git
3f649995a1
gettimeofday and ftime are not quite fully implementable on systems
that only provide a primitive equivalent to clock_gettime, because
they can also report information about a system-wide time zone. This
mechanism has been deprecated for many years because it can only be
configured on a system-wide basis, and because it only supports the
simplest kinds of daylight-savings rules, but we’ve supported it on a
best-effort basis until now. This patch removes our support for it:
* The type 'struct timezone' is still declared as a complete type in
<sys/time.h>, but code that uses its fields (tz_minuteswest and
tz_dsttime) will not compile.
* Similarly, code that uses the 'timezone' and 'dstflag' fields of
struct timeb will not compile anymore. (This is a willful
violation of the older iterations of XPG that included
sys/timeb.h; the relevant conformance tests are XFAILed.)
* Old binaries that pass a non-NULL 'tzp' pointer to gettimeofday
will always receive a 'struct timezone' whose tz_minuteswest and
tz_dsttime fields are zero (as if the system were operating on UTC).
* Similarly, old binaries that call ftime will always receive a
'struct timeb' whose timezone and dstflag fields are zero.
* If the 'tzp' argument to settimeofday is not NULL, the call will fail
and set errno to ENOSYS. (This was already the case on the Hurd.)
* glibc will always pass a second argument of NULL when invoking a
kernel-provided gettimeofday.
* On Alpha, the compat symbols gettimeofday@GLIBC_2.0 and
settimeofday@GLIBC_2.0 (which used 32-bit time_t) now convert
their arguments and call system primitives that use 64-bit time_t,
instead of invoking legacy “osf” system calls.
ChangeLog:
* time/sys/time.h (struct timezone): Remove tz_minuteswest
and tz_dsttime fields; replace with padding to preserve the size.
* time/sys/timeb.h (struct timeb): Remove timezone and dstflag
fields; replace with padding to preserve the size.
* conform/Makefile: XFAIL tests because struct timeb is no longer
fully conformant with Unix98.
* sysdeps/posix/gettimeofday.c
* sysdeps/unix/sysv/linux/gettimeofday.c
* sysdeps/unix/sysv/linux/aarch64/gettimeofday.c
* sysdeps/unix/sysv/linux/powerpc/gettimeofday.c
* sysdeps/unix/sysv/linux/x86/gettimeofday.c
(gettimeofday): When ‘tz’ argument is not NULL, just clear it.
Always pass a null pointer as the second argument to a
gettimeofday (v)syscall.
* sysdeps/unix/bsd/ftime.c: Unconditionally clear the memory that
was formerly the ‘timezone’ and ‘dstflag’ fields of struct timeb.
* sysdeps/unix/syscalls.list: Remove entry for settimeofday.
* sysdeps/unix/settimeofday.c: New file.
(settimeofday): Fail with ENOSYS if ‘tz’ argument is not NULL.
* sysdeps/unix/sysv/linux/alpha/syscalls.list: Remove entries for
osf_gettimeofday, osf_settimeofday, and settimeofday.
* sysdeps/unix/sysv/linux/alpha/osf_gettimeofday.c:
New file. Call the 64-bit gettimeofday, then convert to a
32-bit struct timeval. On overflow, saturate the struct timeval
and fail with EOVERFLOW.
* sysdeps/unix/sysv/linux/alpha/osf_settimeofday.c: New file.
Convert to a 64-bit struct timeval and call 64-bit settimeofday.
Fail with ENOSYS if ‘tz’ argument is not NULL.
* sunrpc/auth_des.c, sunrpc/auth_unix.c
* sysdeps/posix/time.c, sysdeps/unix/stime.c:
Remove unnecessary casts of NULL.
* sysdeps/unix/sysv/linux/powerpc/time.c (time_syscall):
Use (void *)0 instead of NULL when passing a null pointer
as an untyped argument.
* manual/time.texi: Remove documentation of fields of
struct timezone. Revise text to further emphasize that
the second argument to gettimeofday/settimeofday should
always be a null pointer.
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| ChangeLog.old | ||
| argp | ||
| assert | ||
| benchtests | ||
| bits | ||
| catgets | ||
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| crypt | ||
| csu | ||
| ctype | ||
| debug | ||
| dirent | ||
| dlfcn | ||
| elf | ||
| gmon | ||
| gnulib | ||
| grp | ||
| gshadow | ||
| hesiod | ||
| htl | ||
| hurd | ||
| iconv | ||
| iconvdata | ||
| include | ||
| inet | ||
| intl | ||
| io | ||
| libio | ||
| locale | ||
| localedata | ||
| login | ||
| mach | ||
| malloc | ||
| manual | ||
| math | ||
| mathvec | ||
| misc | ||
| nis | ||
| nptl | ||
| nptl_db | ||
| nscd | ||
| nss | ||
| po | ||
| posix | ||
| pwd | ||
| resolv | ||
| resource | ||
| rt | ||
| scripts | ||
| setjmp | ||
| shadow | ||
| signal | ||
| socket | ||
| soft-fp | ||
| stdio-common | ||
| stdlib | ||
| string | ||
| sunrpc | ||
| support | ||
| sysdeps | ||
| sysvipc | ||
| termios | ||
| time | ||
| timezone | ||
| wcsmbs | ||
| wctype | ||
| .gitattributes | ||
| .gitignore | ||
| COPYING | ||
| COPYING.LIB | ||
| ChangeLog | ||
| INSTALL | ||
| LICENSES | ||
| MAINTAINERS | ||
| Makeconfig | ||
| Makefile | ||
| Makefile.in | ||
| Makerules | ||
| NEWS | ||
| README | ||
| Rules | ||
| abi-tags | ||
| aclocal.m4 | ||
| config.h.in | ||
| config.make.in | ||
| configure | ||
| configure.ac | ||
| extra-lib.mk | ||
| gen-locales.mk | ||
| libc-abis | ||
| libof-iterator.mk | ||
| o-iterator.mk | ||
| shlib-versions | ||
| test-skeleton.c | ||
| version.h | ||
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