IV49095: FWRITE() CANNOT WRITE MORE THAN 2GB ITEMS APPLIES TO AIX 7100-02

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The third parameter of fwrite() indicates how many items
  are to be written to the given stdio FILE pointer.
  
  Despite the fact that the parameter accepts a value
  larger than 2^31 (or expressed as 2**31), only 2^31-1
  items may be written.  Larger values result in zero
  bytes written an an errno of 22.
  
  For reference, a verbose prototype of fwrite() is
  expressed thusly:
  
  size_t fwrite(const void *p,        // Data source
                size_t size,          // Size of each item
                size_t NumberOfItems, // Number of items
                FILE *stream)         // Destination
  

Local fix

• If feasible, increase the "size" parameter by some
  integer multiple necessary to allow "NumberOfItems"
  to be expressed as a value less than 2^31.
  

Problem summary

• A call to fwrite(), asking to write more than 2Gb items will
  fail with errno set to 22.
  

Problem conclusion

• Code changes has been made to correct the data type of
  underlying variables to correctly handle the inputs provided
  by fwrite().
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV39748

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U864646

     UP14/02/14 I 1000