os0file.c:

  Fix InnoDB bug: on HP-UX, with a 32-bit binary, InnoDB was only able to read or write <= 2 GB files; the reason was that InnoDB treated the return value of lseek() as a 32-bit integer; lseek was used on HP-UX-11 as a replacement for pread() and pwrite() because HAVE_BROKEN_PREAD was defined on that platform


innobase/os/os0file.c:
  Fix InnoDB bug: on HP-UX, with a 32-bit binary, InnoDB was only able to read or write <= 2 GB files; the reason was that InnoDB treated the return value of lseek() as a 32-bit integer; lseek was used on HP-UX-11 as a replacement for pread() and pwrite() because HAVE_BROKEN_PREAD was defined on that platform

innobase/os/os0file.c

@@ -6,6 +6,8 @@ The interface to the operating system file i/o primitives
 Created 10/21/1995 Heikki Tuuri
 *******************************************************/
 
+#define HAVE_BROKEN_PREAD
+
 #include "os0file.h"
 #include "os0sync.h"
 #include "os0thread.h"
@@ -14,8 +16,6 @@ Created 10/21/1995 Heikki Tuuri
 #include "fil0fil.h"
 #include "buf0buf.h"
 
-#undef HAVE_FDATASYNC
-
 #ifdef POSIX_ASYNC_IO
 /* We assume in this case that the OS has standard Posix aio (at least SunOS
 2.6, HP-UX 11i and AIX 4.3 have) */
@@ -1195,6 +1195,7 @@ os_file_pread(
 	return(n_bytes);
 #else
 	{
+	off_t	ret_offset;
 	ssize_t	ret;
 	ulint	i;
 
@@ -1203,12 +1204,12 @@ os_file_pread(
 	
 	os_mutex_enter(os_file_seek_mutexes[i]);
 
-	ret = lseek(file, offs, 0);
+	ret_offset = lseek(file, offs, SEEK_SET);
 
-	if (ret < 0) {
+	if (ret_offset < 0) {
 		os_mutex_exit(os_file_seek_mutexes[i]);
 
-		return(ret);
+		return(-1);
 	}
 	
 	ret = read(file, buf, (ssize_t)n);
@@ -1281,6 +1282,7 @@ os_file_pwrite(
         return(ret);
 #else
 	{
+	off_t	ret_offset;
 	ulint	i;
 
 	/* Protect the seek / write operation with a mutex */
@@ -1288,12 +1290,12 @@ os_file_pwrite(
 	
 	os_mutex_enter(os_file_seek_mutexes[i]);
 
-	ret = lseek(file, offs, 0);
+	ret_offset = lseek(file, offs, SEEK_SET);
 
-	if (ret < 0) {
+	if (ret_offset < 0) {
 		os_mutex_exit(os_file_seek_mutexes[i]);
 
-		return(ret);
+		return(-1);
 	}
 	
 	ret = write(file, buf, (ssize_t)n);