truncate: Use truncate64 if arch does not have the truncate syscall

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

include/unistd.h

@@ -1110,6 +1110,7 @@ extern int __REDIRECT_NTH (truncate,
 # ifdef __USE_LARGEFILE64
 extern int truncate64 (const char *__file, __off64_t __length)
      __THROW __nonnull ((1)) __wur;
+libc_hidden_proto(truncate64)
 # endif
 
 #endif /* Use BSD || X/Open Unix.  */

libc/sysdeps/linux/common/truncate.c

@@ -10,5 +10,25 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 
+#if defined(__NR_truncate64) && !defined(__NR_truncate)
+# include <endian.h>
+# include <stdint.h>
+
+int truncate(const char *path, __off_t length)
+{
+# if defined __UCLIBC_HAS_LFS
+	return truncate64(path, length);
+# elif __WORDSIZE == 32
+#  if defined(__UCLIBC_TRUNCATE64_HAS_4_ARGS__)
+	return INLINE_SYSCALL(truncate64, 4, path, 0, OFF_HI_LO(length));
+#  else
+	return INLINE_SYSCALL(truncate64, 3, path, OFF_HI_LO(length));
+#  endif
+# endif
+}
+libc_hidden_def(truncate);
+
+#else
 _syscall2(int, truncate, const char *, path, __off_t, length)
 libc_hidden_def(truncate)
+#endif

libc/sysdeps/linux/common/truncate64.c

@@ -52,4 +52,6 @@ int truncate64(const char * path, __off64_t length)
 
 	return -1;
 }
-#endif
+
+#endif /* __NR_truncate64 */
+libc_hidden_def(truncate64)