ftell after fseeko on HP-UX

[Bruno Haible]

Hi Eric,

On HP-UX 11, I got these test failures:

test-ftell.c:85: assertion failed
./test-ftell.sh[3]: 9644 Abort
FAIL: test-ftell.sh

test-ftello.c:93: assertion failed
./test-ftello.sh[3]: 9648 Abort
FAIL: test-ftello.sh

In fact, when reading from a regular file, after the fseek, the file position
is 120 instead of 3. Since none of ftell, fseek, ungetc are overridden by glibc,
this looks like a HP-UX bug to me.

I'm categorizing it as "known bug", and disabling this part of the tests.


2008-04-13  Bruno Haible  <address@hidden>

        Work around a HP-UX stdio bug.
        * tests/test-ftell.c (main): Disable the fseek/ftell test on HP-UX.
        * tests/test-ftello.c (main): Likewise.
        * doc/posix-functions/ftell.texi: Mention HP-UX bug.
        * doc/posix-functions/ftello.texi: Likewise.

*** doc/posix-functions/ftell.texi.orig 2008-04-13 21:38:43.000000000 +0200
--- doc/posix-functions/ftell.texi      2008-04-13 21:37:58.000000000 +0200
***************
*** 10,15 ****
--- 10,19 ----
  @itemize
  @item
  This function mistakenly succeeds on pipes on some platforms: mingw.
+ @item
+ This function produces incorrect results immediately after @code{fseek} on 
some
+ platforms:
+ HP-UX 11.
  @end itemize
  
  Portability problems not fixed by Gnulib:
*** doc/posix-functions/ftello.texi.orig        2008-04-13 21:38:43.000000000 
+0200
--- doc/posix-functions/ftello.texi     2008-04-13 21:37:59.000000000 +0200
***************
*** 15,20 ****
--- 15,24 ----
  The declaration of @code{ftello} in @code{<stdio.h>} is not enabled by default
  on some platforms: glibc 2.3.6.
  @item
+ This function produces incorrect results immediately after @code{fseek} on 
some
+ platforms:
+ HP-UX 11.
+ @item
  This function fails on seekable stdin, stdout, and stderr: cygwin <= 1.5.24.
  @end itemize
  
*** tests/test-ftell.c.orig     2008-04-13 21:38:43.000000000 +0200
--- tests/test-ftell.c  2008-04-13 21:35:15.000000000 +0200
***************
*** 80,88 ****
--- 80,90 ----
    ASSERT (ch == '@');
    ASSERT (ftell (stdin) == 3);
  
+ #if !defined __hpux /* HP-UX 11 has a known bug here */
    /* Test ftell after ungetc without read.  */
    ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
    ASSERT (ftell (stdin) == 3);
+ #endif
  
    ch = ungetc ('~', stdin);
    ASSERT (ch == '~');
*** tests/test-ftello.c.orig    2008-04-13 21:38:43.000000000 +0200
--- tests/test-ftello.c 2008-04-13 21:35:13.000000000 +0200
***************
*** 88,97 ****
--- 88,99 ----
    ASSERT (ftell (stdin) == 3);
    ASSERT (ftello (stdin) == 3);
  
+ #if !defined __hpux /* HP-UX 11 has a known bug here */
    /* Test ftell after ungetc without read.  */
    ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
    ASSERT (ftell (stdin) == 3);
    ASSERT (ftello (stdin) == 3);
+ #endif
  
    ch = ungetc ('~', stdin);
    ASSERT (ch == '~');