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view doc/stat-size.texi @ 17363:5a51fb7777a9
sys_select, sys_time: port 2013-01-30 Solaris 2.6 fix to Cygwin
Problem reported by Marco Atzeri in
<http://lists.gnu.org/archive/html/bug-gnulib/2013-03/msg00000.html>.
* lib/sys_select.in.h [HAVE_SYS_SELECT_H && _CYGWIN_SYS_TIME_H]:
Simply delegate to the system <sys/select.h> in this case too.
Also, pay attention to _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H only
if OSF/1, since otherwise Cygwin breaks, and it doesn't seem to
be needed on Solaris either.
* lib/sys_time.in.h [_CYGWIN_SYS_TIME_H]:
Simply delgate to the system <sys/time.h> in this case.
author | Paul Eggert <eggert@cs.ucla.edu> |
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date | Tue, 19 Mar 2013 09:08:47 -0700 |
parents | 16c748720b01 |
children |
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@node stat-size @section stat-size The @code{stat-size} module provides a small number of macros intended for interpreting the file size information in an instance of @code{struct stat}. @c We deliberately don't document DEV_BSIZE (it looks to James @c Youngman as if the ST_NBLOCKSIZE macro should be used instead). @findex ST_NBLOCKS @findex ST_NBLOCKSIZE @cindex block size On POSIX systems, the @code{st_blocks} member of @code{struct stat} contains the number of disk blocks occupied by a file. The @code{ST_NBLOCKS} macro is used to estimate this quantity on systems which don't actually have @code{st_blocks}. Each of these blocks contains @code{ST_NBLOCKSIZE} bytes. @findex ST_BLKSIZE The value of @code{ST_NBLOCKSIZE} is often quite small, small enough that performing I/O in chunks that size would be inefficient. @code{ST_BLKSIZE} is the I/O block size recommended for I/O to this file. This is not guaranteed to give optimum performance, but it should be reasonably efficient.