Hi, Can somebody tell me how to ensure that a file read goes to disk rather than a buffer? I have studied the low level and stream I/O documentation at www.gnu.org/manual/glibc-2.2.5. I have also done some experimenting with low level and stream I/O.
I want to write a chunk of data to a file and then read it back to verify the integrity of the data on disk. Neither the fread(FILE) nor the read(int) function makes the disk spin. The data which was written is still buffered and so they just grab it from there. The only function which looked promising was __fpurge(FILE *). I suspect this function only purges user buffers, not kernel buffers, and so a subsequent read would go to the kernel buffer, not disk. Suggestions? Thanks! Damon __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com
