Mercurial > gnulib
view doc/posix-functions/renameat.texi @ 39913:73d60b1f9c96
doc: Update for Solaris 11.4.
* doc/**/*.texi: For bugs that exist in both Solaris 11.3 and 11.4,
mention Solaris 11.4.
* m4/printf.m4: Update comments about Solaris.
* m4/log.m4: Likewise.
* m4/log10.m4: Likewise.
* m4/logb.m4: Likewise.
* m4/logbf.m4: Likewise.
* m4/logbl.m4: Likewise.
* m4/rename.m4: Likewise.
* m4/wcrtomb.m4: Likewise.
* m4/hostent.m4: Likewise.
* m4/servent.m4: Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sun, 14 Oct 2018 09:33:46 +0200 |
parents | 11af6bbd6df5 |
children | 1408a8db4054 |
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@node renameat @section @code{renameat} @findex renameat POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/renameat.html} Gnulib module: renameat Portability problems fixed by Gnulib: @itemize @item This function does not reject trailing slashes on non-directories on some platforms, as in @code{renameat(fd,"file",fd,"new/")}: Solaris 11.4. @item This function ignores trailing slashes on symlinks on some platforms, such that @code{renameat(fd,"link/",fd,"new")} corrupts @file{link}: Solaris 9. @item This function is declared in @code{<unistd.h>} instead of @code{<stdio.h>} on some platforms: NetBSD 7.0, Solaris 11.4. @item This function is missing on some platforms: glibc 2.3.6, Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 8, Cygwin 1.5.x, mingw, MSVC 14, Interix 3.5, BeOS. But the replacement function is not safe to be used in libraries and is not multithread-safe. @end itemize Portability problems not fixed by Gnulib: @itemize @item POSIX requires that @code{renameat(fd,"symlink-to-dir/",fd,"dir2")} rename @file{dir} and leave @file{symlink-to-dir} dangling; likewise, it requires that @code{renameat(fd,"dir",fd,"dangling/")} rename @file{dir} so that @file{dangling} is no longer a dangling symlink. This behavior is counter-intuitive, so on some systems, @code{renameat} fails with @code{ENOTDIR} if either argument is a symlink with a trailing slash: glibc, OpenBSD, Cygwin 1.7. @item POSIX requires that @code{renameat} do nothing and return 0 if the source and destination are hard links to the same file. This behavior is counterintuitive, and on some systems @code{renameat} is a no-op in this way only if the source and destination identify the same directory entry. On these systems, for example, although renaming @file{./f} to @file{f} is a no-op, renaming @file{f} to @file{g} deletes @file{f} when @file{f} and @file{g} are hard links to the same file: NetBSD 7.0. @item After renaming a non-empty directory over an existing empty directory, the old directory name is still visible through the @code{stat} function for 30 seconds after the rename, on NFS file systems, on some platforms: Linux 2.6.18. @item This function will not rename a source that is currently opened by any process: mingw, MSVC 14. @end itemize