In article <1991Mar8.180132.12025 at Think.COM> barmar at think.com (Barry Margolin) writes: >This question came up at work yesterday: when sbrk(2) is used to increase >the size of the data segment, is the newly-allocated memory guaranteed to >be empty? You should not assume that. If you want it to contain 0-valued bytes, use memset() to fill it with 0 bytes.