Bug#1034547: manpages-dev: *stat might return EOVERFLOW also for time related fields
Hello,
I did some more research about this issue, so I'm adding some more
information.
On Mon, Apr 17, 2023 at 11:46:38PM +0200, Uwe Kleine-König wrote:
> Package: manpages-dev
> Version: 6.03-1
> Severity: normal
> X-Debbugs-Cc: uklei...@debian.org
>
> Hello,
>
> the manpage for stat, fstat, lstat and fstatat specify that the error
> EOVERLFLOW means:
>
> pathname or fd refers to a file whose size, inode number, or
> number of blocks cannot be represented in, respectively, the
> types off_t, ino_t, or blkcnt_t. This error can occur when, for
> example, an application compiled on a 32-bit platform without
> -D_FILE_OFFSET_BITS=64 calls stat() on a file whose size exceeds
> (1<<31)-1 bytes.
>
> However at least in libc6-2.35 and later EOVERFLOW is also returned if
> st_atim.tv_sec, st_mtim.tv_sec or st_ctim.tv_sec don't fit into an
> int32_t on platforms with __TIME_SIZE == 32.
This happens since commit 4c4e90ccf8e4 ("linux: Implement
fstatat with __fstatat64_time64") in glibc, that's between 2.33.9000 and
2.34. Commit aa03f722f3b994aaf81e72a8904bf33196780930 that was added for
2.33 is also slightly relevant (for platforms with LFS but 32 bit
time_t).
There are a few more calls that can return an undocumented EOVERFLOW:
- clock_gettime
(since commit ec138c67cbda ("sysdeps/clock_gettime: Use clock_gettime64 if
avaliable")
that is already in glibc 2.31)
- ftime
(since commit 5d8aa97da233 ("time: Add 64-bit time_t support for ftime")
that is included in glibc 2.33)
- gettimeofday
(since commit 7455b700279e ("y2038: linux: Provide __gettimeofday64
implementation")
that is included in glibc 2.31)
- sched_rr_get_interval
(since commit b112f53e9d0f ("y2038: linux: Provide __sched_rr_get_interval64
implementation")
that is included in glibc 2.32)
- time
(since commit 75c4044b9a49 ("y2038: linux: Provide __time64 implementation")
included in glibc 2.33)
- timespec_get
(since commit f1c314d27552 ("y2038: linux: Provide __timespec_get64
implementation")
included in glibc 2.32)
I didn't find documenation about this function in manpages-dev, seems
to have appeard for isoc11.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König|
Industrial Linux Solutions | https://www.pengutronix.de/ |
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Bug#1034547: manpages-dev: *stat might return EOVERFLOW also for time related fields
Package: manpages-dev Version: 6.03-1 Severity: normal X-Debbugs-Cc: uklei...@debian.org Hello, the manpage for stat, fstat, lstat and fstatat specify that the error EOVERLFLOW means: pathname or fd refers to a file whose size, inode number, or number of blocks cannot be represented in, respectively, the types off_t, ino_t, or blkcnt_t. This error can occur when, for example, an application compiled on a 32-bit platform without -D_FILE_OFFSET_BITS=64 calls stat() on a file whose size exceeds (1<<31)-1 bytes. However at least in libc6-2.35 and later EOVERFLOW is also returned if st_atim.tv_sec, st_mtim.tv_sec or st_ctim.tv_sec don't fit into an int32_t on platforms with __TIME_SIZE == 32. Best regards Uwe -- System Information: Debian Release: 12.0 APT prefers testing-security APT policy: (700, 'testing-security'), (700, 'testing-debug'), (700, 'stable-security'), (700, 'stable-debug'), (700, 'testing'), (700, 'stable'), (600, 'unstable'), (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'oldstable-updates'), (500, 'oldstable-debug'), (500, 'oldoldstable'), (500, 'oldstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 6.1.0-6-amd64 (SMP w/4 CPU threads; PREEMPT) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages manpages-dev depends on: ii manpages 6.03-1 manpages-dev recommends no packages. Versions of packages manpages-dev suggests: ii man-db [man-browser] 2.11.2-2 -- no debconf information
