renameat2: new module

Although the Linux syscall renameat2 is not in glibc (yet?), it is
useful to have access to its RENAME_NOREPLACE flag.
* MODULES.html.sh (func_all_modules): Add renameat2.
* lib/renameat2.c, lib/renameat2.h, modules/renameat2:
* modules/renameat2-tests, tests/test-renameat2.c: New files.
* lib/renameat.c (renameat): Move most of the implementation
to renameat2, and just call renameat2.
* modules/renameat (Files): Remove lib/at-func2.c.
(Depends-on): Depend only on renameat2.
(Include): Remove <fcntl.h>.
* modules/renameat-tests (test_renameat_LDADD): Add $(LIB_EACCESS),
since renameat (via renameat2) might use faccessat.

modules/renameat

@@ -2,25 +2,11 @@ Description:
 renameat() function: rename a file, relative to two directories
 
 Files:
-lib/at-func2.c
 lib/renameat.c
 m4/renameat.m4
 
 Depends-on:
-stdio
-extensions
-fcntl-h
-filenamecat-lgpl [test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1]
-openat-h         [test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1]
-statat           [test $REPLACE_RENAMEAT = 1]
-stdbool          [test $REPLACE_RENAMEAT = 1]
-at-internal      [test $HAVE_RENAMEAT = 0]
-dosname          [test $HAVE_RENAMEAT = 0]
-getcwd-lgpl      [test $HAVE_RENAMEAT = 0]
-openat-die       [test $HAVE_RENAMEAT = 0]
-rename           [test $HAVE_RENAMEAT = 0]
-same-inode       [test $HAVE_RENAMEAT = 0]
-save-cwd         [test $HAVE_RENAMEAT = 0]
+renameat2        [test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1]
 
 configure.ac:
 gl_FUNC_RENAMEAT
@@ -35,7 +21,6 @@ gl_STDIO_MODULE_INDICATOR([renameat])
 Makefile.am:
 
 Include:
-<fcntl.h>
 <stdio.h>
 
 License:

modules/renameat-tests

@@ -17,4 +17,4 @@ configure.ac:
 Makefile.am:
 TESTS += test-renameat
 check_PROGRAMS += test-renameat
-test_renameat_LDADD = $(LDADD) @LIBINTL@
+test_renameat_LDADD = $(LDADD) $(LIB_EACCESS) @LIBINTL@

modules/renameat2

@@ -0,0 +1,43 @@
+Description:
+renameat2() function: rename a file, relative to two directories
+
+Files:
+lib/at-func2.c
+lib/renameat2.c
+lib/renameat2.h
+m4/renameat.m4
+
+Depends-on:
+stdio
+extensions
+faccessat
+fcntl-h
+filenamecat-lgpl [test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1]
+openat-h         [test $HAVE_RENAMEAT = 0 || test $REPLACE_RENAMEAT = 1]
+statat           [test $REPLACE_RENAMEAT = 1]
+stdbool          [test $REPLACE_RENAMEAT = 1]
+at-internal      [test $HAVE_RENAMEAT = 0]
+dosname          [test $HAVE_RENAMEAT = 0]
+getcwd-lgpl      [test $HAVE_RENAMEAT = 0]
+openat-die       [test $HAVE_RENAMEAT = 0]
+rename           [test $HAVE_RENAMEAT = 0]
+same-inode       [test $HAVE_RENAMEAT = 0]
+save-cwd         [test $HAVE_RENAMEAT = 0]
+
+configure.ac:
+gl_FUNC_RENAMEAT
+if test $HAVE_RENAMEAT = 0; then
+  AC_LIBOBJ([at-func2])
+fi
+
+Makefile.am:
+lib_SOURCES += renameat2.c
+
+Include:
+"renameat2.h"
+
+License:
+GPL
+
+Maintainer:
+Jim Meyering, Eric Blake

modules/renameat2-tests

@@ -0,0 +1,20 @@
+Files:
+tests/test-rename.h
+tests/test-renameat2.c
+tests/signature.h
+tests/macros.h
+
+Depends-on:
+ignore-value
+filenamecat
+getcwd-lgpl
+opendir
+readdir
+closedir
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-renameat2
+check_PROGRAMS += test-renameat2
+test_renameat2_LDADD = $(LDADD) $(LIB_EACCESS) @LIBINTL@