The addition of a second class of operation ("hole punching")
to the man page made it clear that some significant restructuring
is required. So I substantially reworked the page, including the
preexisting material on the default "file allocation" operation.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
FALLOC_FL_PUNCH_HOLE was added in Linux 2.6.38,
for punching holes in the allocated space in a file.
Signed-off-by: Lucian Adrian Grijincu <lucian.grijincu@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
These pages specify feature test macros in the function
prototypes. Add a reference to feature_test_macros(7),
so that readers are pointed to the information that
feature test macros must be defined before including
*any* header file.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The tendency in English, as prescribed in style guides like
Chicago MoS, is towards removing hyphens after prefixes
like "non-" etc.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Glibc doesn't (and quite probably won't) include a wrapper for this
system call. Therefore, point out that potential callers will need
to use syscall(2), and rewrite the RETURN VALUE text to show things
as they would be if syscall() is used.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Add a para to start of page that points out that this is the
low-level, Linux-specific API, and point the reader to posix_fallocate(3)
for the portable API.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Michael Kerrisk