I tried to read the man mmap(2) pages, but as always, these pages leave me in the dark. It would be so nice, if there would be a typical usage example included ( in all man pages!). These pages are designed for people who already know all the In's and outs, but are rather useless to anyone not yet familiar with their content. Am I alone in this assessment?

Ah, you came to my old conclusion that u*ix consists of four-letter commands with 100-page apologies ;-) Yes, you are right, up to a point. The manpages do not intend to tech you anything, they remind the programmer of all the details. For learning, use a book about programming or tutorials. Wrt mmap: #define SOMESIZE 1024 void *p; fd = open("file", O_RDONLY); p = mmap(NULL, (size_t)SOMESIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE, (off_t) 1000); This maps 1024 bytes of "file", from offset 1000 in the file onwards, into a buffer of size 1024, which mmap allocates for you and returns in p. Any changes you make must be commited using a write() on fd (after reopening it O_RDWR). Peter -- The Toronto Linux Users Group. Meetings: http://tlug.ss.org TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml