FSSH_O_TRUNC
#define O_TRUNC FSSH_O_TRUNC
#define FSSH_B_ERASE_FILE FSSH_O_TRUNC // erase the file's data
error = targetDomain->Open(target, FSSH_O_RDWR | FSSH_O_TRUNC,
return fssh_open(path, FSSH_O_WRONLY | FSSH_O_CREAT | FSSH_O_TRUNC, mode);
SET_OPEN_MODE_FLAG(O_TRUNC, FSSH_O_TRUNC)