+2012-11-05 Paul Eggert <eggert@cs.ucla.edu>
+
+ fcntl-h: default O_SEARCH, O_EXEC to O_PATH if available
+ Linux kernel 2.6.39 introduced O_PATH (see
+ <http://lwn.net/Articles/433854/>) and this is a better fallback
+ for O_SEARCH and O_EXEC than O_RDONLY, if O_PATH is available.
+ * doc/posix-headers/fcntl.texi (fcntl.h): Document this.
+ * lib/fcntl.in.h (O_EXEC, O_SEARCH) [O_PATH]: Default to O_PATH.
+ * lib/fcntl.in.h (O_ACCMODE):
+ * tests/test-fcntl-h.c (main):
+ Do not reject O_ACCMODE merely because it has more than the
+ minimal number of bits, as POSIX allows extensions here.
+
2012-11-04 Andrew Warshall <warshall@99main.com> (tiny change)
mountlist: do not classify a bind-mounted dir entry as "dummy"
@item
@samp{O_EXEC} and @samp{O_SEARCH} are not defined on some platforms.
-Gnulib defines these macros to @samp{O_RDONLY}, which is typically 0.
+On platforms such as GNU/Linux 2.6.39 and later that have @samp{O_PATH},
+Gnulib defines these macros to @samp{O_PATH}.
+On other platforms, it defines them to @samp{O_RDONLY}, which is typically 0.
@item
@samp{O_ACCMODE} is not defined on some platforms:
#endif
#ifndef O_EXEC
-# define O_EXEC O_RDONLY /* This is often close enough in older systems. */
+# ifdef O_PATH
+# define O_EXEC O_PATH
+# else
+# define O_EXEC O_RDONLY /* This is often close enough in older systems. */
+# endif
#endif
#ifndef O_IGNORE_CTTY
#endif
#ifndef O_SEARCH
-# define O_SEARCH O_RDONLY /* This is often close enough in older systems. */
+# ifdef O_PATH
+# define O_SEARCH O_PATH
+# else
+# define O_SEARCH O_RDONLY /* This is often close enough in older systems. */
+# endif
#endif
#ifndef O_SYNC
# define O_TTY_INIT 0
#endif
-#if O_ACCMODE != (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
+#if ~O_ACCMODE & (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
# undef O_ACCMODE
# define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
#endif
#if O_SEARCH && O_EXEC != O_SEARCH && O_SEARCH != O_RDONLY
case O_SEARCH:
#endif
- i = O_ACCMODE == (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH);
+ i = ! (~O_ACCMODE & (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH));
break;
/* Everyone should have these */