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

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• Hash : 48e98834
  Author :
  Date : 2009-11-07T21:34:32
  

  open: detect FreeBSD bug
  
  open("link-to-file/", O_RDONLY) mistakenly succeeds.  The previous
  patch was enough to fix utimens when no fd is involved, but this is
  necessary for futimens to pass.
  
  * m4/open.m4 (gl_FUNC_OPEN): Also detect FreeBSD bug with slash on
  symlink.
  * doc/posix-functions/open.texi (open): Document the bug.
  * doc/posix-functions/utimes.texi (utimes): Likewise.
  * tests/test-open.h (test_open): Add parameters, and test symlink
  handling.
  * tests/test-open.c (main): Adjust caller.
  * tests/test-fcntl-safer.c (main): Likewise.
  * modules/open-tests (Depends-on): Add stdbool, symlink.
  * modules/fcntl-safer-tests (Depends-on): Likewise.
  * tests/test-openat.c (main): Add test-open tests.
  
  Signed-off-by: Eric Blake <ebb9@byu.net>
  

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• doc/posix-functions/open.texi

• @node open
  @section @code{open}
  @findex open
  
  POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/open.html}
  
  Gnulib module: open, fchdir
  
  Portability problems fixed by the Gnulib module open:
  @itemize
  @item
  This function does not fail when the file name argument ends in a slash
  and (without the slash) names a nonexistent file or a file that is not a
  directory, on some platforms:
  FreeBSD 7.2, HP-UX 11.00, Solaris 9, Irix 5.3.
  @item
  On Windows platforms (excluding Cygwin), this function does usually not
  recognize the @file{/dev/null} filename.
  @end itemize
  
  Portability problems fixed by the Gnulib module fchdir:
  @itemize
  @item
  On Windows platforms (excluding Cygwin), this function fails to open a
  read-only descriptor for directories.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  On Windows, this function returns a file handle in @code{O_TEXT} mode by
  default; this means that it translates '\n' to CR/LF by default.  Use the
  @code{O_BINARY} flag if you need reliable binary I/O.
  @item
  On platforms where @code{off_t} is a 32-bit type, @code{open} may not work
  correctly with files larger than 2 GB.  The fix is to use the
  @code{AC_SYS_LARGEFILE} macro.
  @end itemize
  

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