[Ltp-cvs] ltp/testcases/kernel/ipc/pipeio pipeio.c,1.12,1.13

[Subrata <sub...@us...>]

Update of /cvsroot/ltp/ltp/testcases/kernel/ipc/pipeio
In directory ddv4jf1.ch3.sourceforge.com:/tmp/cvs-serv15670/ltp/testcases/kernel/ipc/pipeio

Modified Files:
	pipeio.c 
Log Message:
Quick and dirty fix to overflow in pipeio when computing the number of writes: the computation of the number of writes in pipeio can overflow, eg. if you want to run more than 4 GB through the pipe. The attached patch fixes that. Signed-off-by: Jiri Palecek <jpa...@we...>.


Index: pipeio.c
===================================================================
RCS file: /cvsroot/ltp/ltp/testcases/kernel/ipc/pipeio/pipeio.c,v
retrieving revision 1.12
retrieving revision 1.13
diff -C2 -d -r1.12 -r1.13
*** pipeio.c	19 Sep 2008 11:01:41 -0000	1.12
--- pipeio.c	12 Nov 2008 06:14:34 -0000	1.13
***************
*** 410,416 ****
  	if ( size > PIPE_BUF && num_wrters > 1 ) {
  	    if ( ! loop ) {
! 		j=(num_writes*size)/PIPE_BUF;
! 		if ( (num_writes*size)%PIPE_BUF ) 
! 		    j++;
  		num_writes=j;
  	        tst_resm (TINFO, "adjusting i/o size to %d, and # of writes to %d",
--- 410,414 ----
  	if ( size > PIPE_BUF && num_wrters > 1 ) {
  	    if ( ! loop ) {
! 		j=((long long)num_writes*size+PIPE_BUF-1)/PIPE_BUF;
  		num_writes=j;
  	        tst_resm (TINFO, "adjusting i/o size to %d, and # of writes to %d",