kc3-lang/gnulib/doc/posix-functions/rename.texi

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• doc/posix-functions/rename.texi

• @node rename
  @section @code{rename}
  @findex rename
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/rename.html}
  
  Gnulib module: rename
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This function does not allow trailing slashes when creating a
  destination directory, as in @code{rename("dir","new/")}:
  NetBSD 1.6.
  @item
  This function does not reject trailing slashes on the destination for
  non-directories on some platforms, as in @code{rename("file","new/")}:
  AIX 7.1, Solaris 11.3, Cygwin 1.5.x, mingw, MSVC 14.
  @item
  This function does not reject trailing slashes on symlinks to
  non-directories on some platforms, as in
  @code{rename("link-to-file/","f")}:
  FreeBSD 7.2.
  @item
  This function ignores trailing slashes on symlinks on some platforms,
  such that @code{rename("link/","new")} corrupts @file{link}:
  Solaris 9.
  @item
  This function incorrectly reduces the link count when comparing two
  spellings of a hard link on some platforms:
  NetBSD 1.6, Cygwin 1.5.x.
  @item
  This function will not always replace an existing destination on some
  platforms:
  Cygwin 1.5.x, mingw, MSVC 14.
  However, the replacement is not atomic for directories, and may end up
  losing the empty destination if the source could not be renamed.
  @item
  This function mistakenly allows names ending in @samp{.} or @samp{..}
  on some platforms:
  Cygwin 1.5.x, mingw, MSVC 14.
  @item
  This function does not reject attempts to rename existing directories
  and non-directories onto one another on some platforms:
  Cygwin 1.5.x, mingw, MSVC 14.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  POSIX requires that @code{rename("symlink-to-dir/","dir2")} rename
  @file{dir} and leave @file{symlink-to-dir} dangling; likewise, it
  requires that @code{rename("dir","dangling/")} rename @file{dir} so
  that @file{dangling} is no longer a dangling symlink.  This behavior
  is counter-intuitive, so on some systems, @code{rename} fails with
  @code{ENOTDIR} if either argument is a symlink with a trailing slash:
  glibc, OpenBSD, Cygwin 1.7.
  @item
  POSIX requires that @code{rename} 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
  

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