[avr-libc-dev] [bug #6141] printf(), printf_P() dont check if STDOUT == NULL

[nobody]

=================== BUG #6141: FULL BUG SNAPSHOT ===================
http://savannah.nongnu.org/bugs/?func=detailbug&bug_id=6141&group_id=2140

Submitted by: andreas_becker          Project: AVR C Runtime Library        
Submitted on: Fri 10/24/2003 at 10:52
Category:  Library                    Severity:  5 - Major                  
Bug Group:  None                      Resolution:  None                     
Assigned to:  None                    Originator Email:  address@hidden
Status:  Open                         

Summary:  printf(), printf_P() dont check if STDOUT == NULL

Original Submission:  The Functions printf() and printf_P assume, that the 
caller allways did a fdevopen() before.

If not, they writing to the registers (printf_P, line 44)



My Solution looks like this:

insert the following code at printf.c:41 and printf_p.c:43.



if (stdout == NULL) {

  return EOF;

}

The check in printf.c protects the called vfprintf function.





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http://savannah.nongnu.org/bugs/?func=detailbug&bug_id=6141&group_id=2140

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