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e8712cc1
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Date :
2025-06-13T12:27:44
stat: Support the file name "/dev/null" on native Windows. Reported by Collin Funk in <https://lists.gnu.org/archive/html/bug-gnulib/2025-06/msg00119.html>. * lib/stat.c (rpl_stat): On native Windows, map "/dev/null" to "NUL". * tests/test-fstat.c (main): Test /dev/null also on native Windows. * tests/test-stat.h (test_stat_func): Likewise. * tests/test-lstat.h (test_lstat_func): Likewise. * doc/posix-functions/stat.texi: Mention problem of null device name. * doc/posix-functions/lstat.texi: Likewise.
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@node lstat
@subsection @code{lstat}
@findex lstat
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/lstat.html}
Gnulib module: lstat
@mindex lstat
Portability problems fixed by Gnulib:
@itemize
@item
On platforms where @code{off_t} is a 32-bit type, @code{lstat} may not
correctly report the size of files or block devices 2 GiB and larger.
@xref{Large File Support}.
@item
On Linux/x86 and Linux/x86_64, applications compiled in 32-bit mode cannot
access files that happen to have a 64-bit inode number. This can occur with
file systems such as XFS (typically on large disks) and NFS.
@xref{Large File Support}.
@item
For symlinks, when the argument ends in a slash, some platforms don't
dereference the argument:
Solaris 9.
@item
On some platforms, @code{lstat("file/",buf)} succeeds instead of
failing with @code{ENOTDIR}.
macOS 14, Solaris 9.
@item
On macOS 12.6, when this function yields a timestamp with a
nonpositive @code{tv_sec} value, @code{tv_nsec} might be in the range
@minus{}999999999..@minus{}1, representing a negative nanoseconds
offset from @code{tv_sec}. Solaris 11.4 is similar, except that
@code{tv_sec} might also be @minus{}1000000000.
@item
On Windows platforms (excluding Cygwin), a different name has to be used
for the null device, namely @code{"NUL"} instead of @code{"/dev/null"}.
@item
On Windows platforms (excluding Cygwin), symlinks are not supported, so
@code{lstat} does not exist.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
@xref{sys/stat.h}, for general portability problems with @code{struct stat}.
@end itemize