buffer_mmapread(3)

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)