[Bug libc/4359] New: the __freadable function is not compatible with Solaris

[Bug libc/4359] New: the __freadable function is not compatible with Solaris

[bruno at clisp dot org]

The comments in <stdio_ext.h> indicate that the functions declared in this
file are intended to be Solaris compatible. However, __freadable is not.

Attached program prints on Solaris:

Initial state for write-only stream: 0 1
Initial state for read-only stream:  1 0
Initial state for read-write stream: 0 0
Initial state for read-write stream: 0 0

And on a glibc system:

Initial state for write-only stream: 1 1
Initial state for read-only stream:  1 0
Initial state for read-write stream: 1 0
Initial state for read-write stream: 1 0

-- 
           Summary: the __freadable function is not compatible with Solaris
           Product: glibc
           Version: 2.3.6
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: bruno at clisp dot org
                CC: glibc-bugs at sources dot redhat dot com
 GCC build triplet: i586-suse-linux
  GCC host triplet: i586-suse-linux
GCC target triplet: i586-suse-linux


http://sourceware.org/bugzilla/show_bug.cgi?id=4359

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[Bug libc/4359] the __freadable function is not compatible with Solaris

[bruno at clisp dot org]

------- Additional Comments From bruno at clisp dot org  2007-04-13 23:05 -------
Created an attachment (id=1679)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=1679&action=view)
source code of test program


-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=4359

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[Bug libc/4359] the __freading function is not compatible with Solaris

[bruno at clisp dot org]

------- Additional Comments From bruno at clisp dot org  2007-04-13 23:07 -------
Oops, I meant __freading, not __freadable.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|the __freadable function is |the __freading function is
                   |not compatible with Solaris |not compatible with Solaris


http://sourceware.org/bugzilla/show_bug.cgi?id=4359

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[Bug libc/4359] the __freading function is not compatible with Solaris

[drepper at redhat dot com]

------- Additional Comments From drepper at redhat dot com  2007-10-13 07:21 -------
While I don't quite see why it's needed (libio simply puts new streams in
read-mode) I added appropriate changes.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://sourceware.org/bugzilla/show_bug.cgi?id=4359

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[Bug libc/4359] the __freading function is not compatible with Solaris

[bruno at clisp dot org]

------- Additional Comments From bruno at clisp dot org  2007-10-13 11:12 -------
Thank you. This change allows to describe what __freading returns in a quite
precise way, as follows. Also, it makes __freading symmetric to __fwriting.


/* Return true if the stream STREAM is opened read-only, or if the
   last operation on the stream was a read operation.  Return false if
   the stream is opened write-only or append-only, or if it supports
   writing and there is no current read operation (such as fputc).

   freading and fwriting will never both be true.  If STREAM supports
   both reads and writes, then:
     - both freading and fwriting might be false when the stream is first
       opened, after read encounters EOF, or after fflush,
     - freading might be false or true and fwriting might be false
       after repositioning (such as fseek, fsetpos, or rewind),
   depending on the underlying implementation.  */
extern int __freading (FILE *stream);


-- 


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