NAME

       buffer_mmapread - create read-only memory-mapped file buffer

SYNTAX

       #include <libowfat/buffer.h>

       int buffer_mmapread(buffer &b,const char* filename);

DESCRIPTION

       buffer_mmapread  opens  filename  for reading and fills b so that the contents of the file
       can be read from it.  Using mmap is more efficient than reading through a real buffer, but
       you have to call buffer_close to unmap the memory in the end.

EXAMPLE

         #include <libowfat/buffer.h>
         #include <libowfat/open.h>

         buffer input;
         char x;

         buffer_mmapread(&input,"/etc/passwd");
         while (buffer_get(&input,&x,1)==1) {
           buffer_put(buffer_1,&x,1);
           if (x=='\n') break;
         }
         buffer_flush(buffer_1);
         buffer_close(&input);

RETURN VALUE

       buffer_mmapread returns 0 if everything was fine, -1 on error (setting errno).

SEE ALSO

       buffer_flush(3), buffer(3)

                                                                               buffer_mmapread(3)