Update.

2002-08-26  Ulrich Drepper  <drepper@redhat.com>

	* libio/wfileops.c (_IO_wfile_seekoff): Set fp->_offset after
	finding the read position [PR libc/4265].
	* libio/Makefile (tests): Add bug-rewind2.
	* libio/bug-rewind2.c: New file.

4 files changed, 83 insertions, 7 deletions

diff --git a/libio/Makefile b/libio/Makefile
index 58d6575..a6d3a24 100644
--- a/libio/Makefile
+++ b/libio/Makefile
@@ -51,7 +51,7 @@ tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc   \
 	tst_wprintf2 tst-widetext test-fmemopen tst-ext tst-fopenloc	      \
 	tst-fgetws tst-ungetwc1 tst-ungetwc2 tst-swscanf tst-sscanf	      \
 	tst-mmap-setvbuf bug-ungetwc1 bug-ungetwc2 tst-atime tst-eof          \
-	tst-freopen bug-rewind bug-ungetc bug-fseek \
+	tst-freopen bug-rewind bug-rewind2 bug-ungetc bug-fseek \
 	tst-mmap-eofsync tst-mmap-fflushsync bug-mmap-fflush \
 	tst-mmap2-eofsync tst-mmap-offend
 test-srcs = test-freopen
diff --git a/libio/bug-rewind.c b/libio/bug-rewind.c
index 52bf38b..4f8242d 100644
--- a/libio/bug-rewind.c
+++ b/libio/bug-rewind.c
@@ -5,11 +5,26 @@
 #define	FAILED  3
 
 
+static int fd;
+
+static void prepare (void);
+#define PREPARE(argc, argv) prepare ()
+
+
 #define TEST_FUNCTION do_test ()
 static int do_test (void);
 #include "../test-skeleton.c"
 
 
+static void
+prepare (void)
+{
+  fd = create_temp_file ("wrewind.", NULL);
+  if (fd == -1)
+    exit (3);
+}
+
+
 static int
 do_test (void)
 {
@@ -17,11 +32,6 @@ do_test (void)
   char arg1;
   char arg2;
   int ret1, ret2, result, num;
-  int fd;
-
-  fd = create_temp_file ("wrewind.", NULL);
-  if (fd == -1)
-    return 3;
 
   ret1 = 0;
   ret2 = 0;
diff --git a/libio/bug-rewind2.c b/libio/bug-rewind2.c
new file mode 100644
index 0000000..51b5744
--- /dev/null
+++ b/libio/bug-rewind2.c
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <wchar.h>
+
+
+static int fd;
+
+static void prepare (void);
+#define PREPARE(argc, argv) prepare ()
+
+
+#define TEST_FUNCTION do_test ()
+static int do_test (void);
+#include "../test-skeleton.c"
+
+
+static void
+prepare (void)
+{
+  fd = create_temp_file ("wrewind2.", NULL);
+  if (fd == -1)
+    exit (3);
+}
+
+
+static int
+do_test (void)
+{
+  wchar_t dummy[10];
+  int ret = 0;
+  FILE *fp;
+  int result = 0;
+
+  fp = fdopen (fd, "w+");
+  if (fp == NULL)
+    {
+      puts ("fopen(""testfile"", ""w+"") returned NULL.");
+      return 1;
+    }
+  else
+    {
+      fwprintf (fp, L"abcd");
+      printf ("current pos = %ld\n", ftell (fp));
+      if (ftell (fp) != 4)
+	result = 1;
+
+      rewind (fp);
+      ret = fwscanf (fp, L"%c", dummy);
+
+      printf ("current pos = %ld\n", ftell (fp));
+      if (ftell (fp) != 1)
+	result = 1;
+
+      rewind (fp);
+      printf ("current pos = %ld\n", ftell (fp));
+      if (ftell (fp) != 0)
+	result = 1;
+
+      fclose (fp);
+    }
+
+  return result;
+}
diff --git a/libio/wfileops.c b/libio/wfileops.c
index e9fe55b..02933b7 100644
--- a/libio/wfileops.c
+++ b/libio/wfileops.c
@@ -674,7 +674,7 @@ _IO_wfile_seekoff (fp, offset, dir, mode)
 						   + (sizeof (buffer)
 						      / sizeof (buffer[0])),
 						   &ignore);
-		  if (status !=  __codecvt_ok && status != __codecvt_partial)
+		  if (status != __codecvt_ok && status != __codecvt_partial)
 		    {
 		      fp->_flags |= _IO_ERR_SEEN;
 		      goto dumb;
@@ -682,6 +682,10 @@ _IO_wfile_seekoff (fp, offset, dir, mode)
 		}
 	      while (read_ptr_copy != fp->_IO_read_ptr);
 
+	      fp->_offset = (fp->_offset
+			     - (fp->_IO_read_end - fp->_IO_read_base)
+			     + rel_offset);
+
 	      fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end
 		= fp->_wide_data->_IO_read_base;