F_PUNCHHOLE

[anacrolix]

Apple has F_PUNCHHOLE for punching file system holes.

aarch64-apple-darwin

fcntl.h:

#define F_PUNCHHOLE     99              /* Deallocate a range of the file */
/* fpunchhole_t used by F_PUNCHHOLE */
typedef struct fpunchhole {
	unsigned int fp_flags; /* unused */
	unsigned int reserved; /* (to maintain 8-byte alignment) */
	off_t fp_offset; /* IN: start of the region */
	off_t fp_length; /* IN: size of the region */
} fpunchhole_t;

Happy to add this myself with some pointers. Cheers!

[devnexen]

please do :-) here is the contributing guide.

[anacrolix]

Woops, already did, here's the PR #3337