Used for getting the resource limit for closing all child process FDs. Could be completely replaced by fcloseall() if available for Unix or _fcloseall() for Windows, either conditionally on Q_OS_type or using a configure test.

It would be useful to get the information from marten's comment into the CMakeLists.txt, for the next reader.

Everywhere else we just skip calling utime() on non-unix.

Long term, QFileDevice::setFileTime is coming, slowly.

I'm surprised that this is needed, we use S_ISDIR in KIO without such #define.

None of the files using S_ISDIR are actually compiled on Windows.

src/ioslaves/ftp/ftp.cpp
1558:            //if ( S_ISDIR( (mode_t)ftpEnt.type ) )

src/ioslaves/trash/trashimpl.cpp
1164:        if ((S_ISDIR(buff.st_mode))  // must be a dir
1177:                        && (S_ISDIR(buff.st_mode)) // must be a dir
1200:                && (S_ISDIR(buff.st_mode)) // must be a dir

ftp.cpp: Commented line
trashimpl.cpp: Not compiled. See [1]

[1]

if(WIN32)
  set(kio_trash_PART_SRCS kio_trash_win.cpp kiotrashdebug.cpp)
else()
  # Files that are shared with the KCM. Unix specific.
  set (trashcommon_unix_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/trashimpl.cpp
...

While fcloseall() is listed as a GNU extension in the Linux man pages, it is also available on FreeBSD -- but not OpenBSD or NetBSD. A configure test seems appropriate.