Mercurial > gnulib
view doc/posix-functions/stat.texi @ 39162:efff996688b8
stat: work around Solaris bug with tv_nsec < 0
* doc/posix-functions/fstat.texi (fstat):
* doc/posix-functions/fstatat.texi (fstatat):
* doc/posix-functions/lstat.texi (lstat):
* doc/posix-functions/stat.texi (stat):
Mention Solaris 11 bug.
* lib/fstat.c, lib/fstatat.c, lib/lstat.c: Include stat-time.h.
* lib/fstat.c (rpl_fstat) [!WINDOWS_NATIVE]:
* lib/lstat.c (rpl_lstat):
* lib/stat.c (rpl_stat):
Normalize resulting timestamps.
* lib/fstatat.c (normal_fstatat): New function.
(rpl_fstatat): Use it.
* lib/stat-time.h: Include intprops.h, errno.h, stddef.h.
(stat_time_normalize): New function.
* m4/fstat.m4 (gl_FUNC_FSTAT):
* m4/fstatat.m4 (gl_FUNC_FSTATAT):
* m4/lstat.m4 (gl_FUNC_LSTAT):
* m4/stat.m4 (gl_FUNC_STAT):
Replace on Solaris.
* modules/fstat (Depends-on):
* modules/fstatat (Depends-on):
Add stat-time.
* modules/stat-time (Depends-on): Add errno, intprops.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Thu, 23 Nov 2017 00:05:57 -0800 |
parents | 927867cc7daa |
children | fa68dbcfa5fd |
line wrap: on
line source
@node stat @section @code{stat} @findex stat POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/stat.html} Gnulib module: stat Portability problems fixed by Gnulib: @itemize @item On platforms where @code{off_t} is a 32-bit type, @code{stat} may not correctly report the size of files or block devices larger than 2 GB. (Cf. @code{AC_SYS_LARGEFILE}.) @item The @code{st_atime}, @code{st_ctime}, @code{st_mtime} fields are affected by the current time zone and by the DST flag of the current time zone on some platforms: mingw, MSVC 14 (when the environment variable @code{TZ} is set). @item On MSVC 14, this function fails with error @code{ENOENT} on files such as @samp{C:\pagefile.sys} and on directories such as @samp{C:\System Volume Information}. @item On some platforms, @code{stat("link-to-file/",buf)} succeeds instead of failing with @code{ENOTDIR}. FreeBSD 7.2, AIX 7.1, Solaris 9, mingw64. @item On some platforms, @code{stat(".",buf)} and @code{stat("./",buf)} give different results: mingw, MSVC 14. @item On Solaris 11.3, when this function yields a timestamp with a nonpositive @code{tv_sec} value, @code{tv_nsec} might in the range @minus{}1000000000..@minus{}1, representing a negative nanoseconds offset from @code{tv_sec}. @end itemize Portability problems not fixed by Gnulib: @itemize @item @xref{sys/stat.h}, for general portability problems with @code{struct stat}. @item Cygwin's @code{stat} function sometimes sets @code{errno} to @code{EACCES} when @code{ENOENT} would be more appropriate. @item Because of the definition of @code{struct stat}, it is not possible to portably replace @code{stat} via an object-like macro. Therefore, expressions such as @code{(islnk ? lstat : stat) (name, buf)} are not portable, and should instead be written @code{islnk ? lstat (name, buf) : stat (name, buf)}. @end itemize