Add fdatasync(2) man page, combined with fsync(2).

[emaste]

lib/libc/sys/fsync.2

6

s/was/were/

78–81

Can we be more specific here, or at least avoid "appear"?

[kib]

Notes by Ed.

[wblock]

lib/libc/sys/fsync.2

78

Passive -> active:

If the file metadata has already been committed, using

81

"for the same purpose" is a little unclear. How about

can be more efficient than
.Fn fsync .

95

Either remove the "The" at the beginning of this sentence, or add a word before "fail" to say what they are:

"fsync and fdatasync fail if:"
or
"The fsync and fdatasync calls fail if:"

[kib]

wblock changes

[rpokala]

Other than the optional change I suggested for the '.Nd' line, this looks good to me.

lib/libc/sys/fsync.2

42

"synchronize changes to a file's data, without or with it's metadata"

[kib]

lib/libc/sys/fsync.2

42

Wouldn't it clutter the tag line ? Some changes are synced, which are is described in the main text.

fdatasync(2) cannot be a default choice, it requires careful consideration if used.

[emaste]

lib/libc/sys/fsync.2

37

Update