- OFLAG_STRING should contain an integer, followed by an optional
- symbolic representation of an open flag using only '|' to separate
- its components (e.g. "O_WRONLY|O_CREAT|O_TRUNC"). Prefer the
- symbolic representation if available, falling back on the numeric
- representation otherwise.
+ OFLAG_STRING should contain an optional integer, followed by an optional
+ symbolic representation of an open flag using only '|' to separate its
+ components (e.g. "O_WRONLY|O_CREAT|O_TRUNC"). Prefer the symbolic
+ representation if available, falling back on the numeric
+ representation, or to zero if both formats are absent.