Michael Raskin wrote:
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Edward Shishkin wrote:
Desired: something (probably, one block) is allocated/reserved for the
file. File length is set to 1 byte.
Where is it documented?
IMHO we should only guarantee that writes
to [0, 1] won't fail because of lack of disk space.
Other things (including file size) are up to implementation.
POSIX, SUS.
http://www.opengroup.org/onlinepubs/009695399/functions/posix_fallocate.html
<<<
If the offset+ len is beyond the current file size, then
posix_fallocate() shall adjust the file size to offset+ len. Otherwise,
the file size shall not be changed.
fallocate (2) is something different from posix_fallocate:
"...This default behavior closely resembles the behavior
of the posix_fallocate(3) library function, and is intended
as a method of optimally implementing that function."
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