Consolidate Linux ftruncate implementations

THis patch consolidates all Linux ftruncate implementation on
sysdeps/unix/sysv/linux/ftruncate{64}.c.  It is based on
{INTERNAL,INLINE}_SYSCALL patch [1] to simplify the syscall construction.

General idea is to build ftruncate iff __OFF_T_MATCHES_OFF64_T is not
defined, otherwise ftruncate64 will be build and ftruncate will be an
alias.  The fallocate will use old compat syscall and pass 32-bit off_t
argument, while fallocate64 will handle the correct off64_t passing using
__ALIGNMENT_ARG and SYSCALL_LL64 macros.

Tested on x86_64, i386, aarch64, and armhf.

	* posix/tst-truncate-common.c: New file.
	* posix/tst-truncate.c: Use tst-truncate-common.c.
	* posix/tst-truncate64.c: Likewise and add LFS tests.
	* sysdeps/unix/sysv/linux/arm/ftruncate64.c: Remove file.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate.c: Likewise.
	* sysdeps/unix/sysv/linux/generic/wordsize-32/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/ftruncate64.c: Likewise.
	* sysdeps/unix/sysv/linux/ftruncate.c: New file.
	* sysdeps/unix/sysv/linux/ftruncate64.c (__ftruncate64): Use
	INLINE_SYSCALL_CALL, __ALIGNMENT_ARG and SYSCALL_LL64 macros.
	[__OFF_T_MATCHES_OFF64_T] (ftruncate): Add alias.
	* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (ftruncate):
	Remove.
	* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (ftruncate):
	Likewise.

[1] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html

1 files changed, 4 insertions, 110 deletions

diff --git a/posix/tst-truncate.c b/posix/tst-truncate.c
index 99bddb3..3166c3b 100644
--- a/posix/tst-truncate.c
+++ b/posix/tst-truncate.c
@@ -17,116 +17,10 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
-#include <error.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/stat.h>
+#include "tst-truncate-common.c"
 
-
-/* Allow testing of the 64-bit versions as well.  */
-#ifndef TRUNCATE
-# define TRUNCATE truncate
-# define FTRUNCATE ftruncate
-#endif
-
-#define STRINGIFY(s) STRINGIFY2 (s)
-#define STRINGIFY2(s) #s
-
-/* Prototype for our test function.  */
-extern void do_prepare (int argc, char *argv[]);
-extern int do_test (int argc, char *argv[]);
-
-/* We have a preparation function.  */
-#define PREPARE do_prepare
-
-/* We might need a bit longer timeout.  */
-#define TIMEOUT 20 /* sec */
-
-/* This defines the `main' function and some more.  */
-#include <test-skeleton.c>
-
-/* These are for the temporary file we generate.  */
-char *name;
-int fd;
-
-void
-do_prepare (int argc, char *argv[])
+static int
+do_test (void)
 {
-   size_t name_len;
-
-#define FNAME FNAME2(TRUNCATE)
-#define FNAME2(s) "/" STRINGIFY(s) "XXXXXX"
-
-   name_len = strlen (test_dir);
-   name = xmalloc (name_len + sizeof (FNAME));
-   mempcpy (mempcpy (name, test_dir, name_len), FNAME, sizeof (FNAME));
-   add_temp_file (name);
-
-   /* Open our test file.   */
-   fd = mkstemp (name);
-   if (fd == -1)
-     error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
-}
-
-
-int
-do_test (int argc, char *argv[])
-{
-  struct stat st;
-  char buf[1000];
-
-  memset (buf, '\0', sizeof (buf));
-
-  if (write (fd, buf, sizeof (buf)) != sizeof (buf))
-    error (EXIT_FAILURE, errno, "during write");
-
-  if (fstat (fd, &st) < 0 || st.st_size != sizeof (buf))
-    error (EXIT_FAILURE, 0, "initial size wrong");
-
-
-  if (FTRUNCATE (fd, 800) < 0)
-    error (EXIT_FAILURE, errno, "size reduction with %s failed",
-	   STRINGIFY (FTRUNCATE));
-
-  if (fstat (fd, &st) < 0 || st.st_size != 800)
-    error (EXIT_FAILURE, 0, "size after reduction with %s incorrect",
-	   STRINGIFY (FTRUNCATE));
-
-  /* The following test covers more than POSIX.  POSIX does not require
-     that ftruncate() can increase the file size.  But we are testing
-     Unix systems.  */
-  if (FTRUNCATE (fd, 1200) < 0)
-    error (EXIT_FAILURE, errno, "size increase with %s failed",
-	   STRINGIFY (FTRUNCATE));
-
-  if (fstat (fd, &st) < 0 || st.st_size != 1200)
-    error (EXIT_FAILURE, 0, "size after increase with %s incorrect",
-	   STRINGIFY (FTRUNCATE));
-
-
-  if (TRUNCATE (name, 800) < 0)
-    error (EXIT_FAILURE, errno, "size reduction with %s failed",
-	   STRINGIFY (TRUNCATE));
-
-  if (fstat (fd, &st) < 0 || st.st_size != 800)
-    error (EXIT_FAILURE, 0, "size after reduction with %s incorrect",
-	   STRINGIFY (TRUNCATE));
-
-  /* The following test covers more than POSIX.  POSIX does not require
-     that truncate() can increase the file size.  But we are testing
-     Unix systems.  */
-  if (TRUNCATE (name, 1200) < 0)
-    error (EXIT_FAILURE, errno, "size increase with %s failed",
-	   STRINGIFY (TRUNCATE));
-
-  if (fstat (fd, &st) < 0 || st.st_size != 1200)
-    error (EXIT_FAILURE, 0, "size after increase with %s incorrect",
-	   STRINGIFY (TRUNCATE));
-
-
-  close (fd);
-  unlink (name);
-
-  return 0;
+  return do_test_with_offset (0);
 }