fseek
format:         #fseek {FILE} {offset} {start_position}
start_position must be one of SEEK_CUR, SEEK_END, SEEK_SET.
The variable _ is set to 0 if successful, non-zero on fail.
See help on C function: int fseek( FILE *stream, long offset, int origin );
See also: fopen/fclose, feof, fseek, fgets, fputs, fread, fwrite, remove, rename, sysecho