https://bugzilla.mindrot.org/show_bug.cgi?id=3798
Bug ID: 3798
Summary: Add native sparse file support (SEEK_HOLE, SEEK_DATA)
to scp/sftp
Product: Portable OpenSSH
Version: 9.9p2
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P5
Component: sftp-server
Assignee: unassigned-b...@mindrot.org
Reporter: lionelcons1...@gmail.com
Please add NATIVE sparse file support in scp/sftp via
SEEK_DATA/SEEK_HOLE on
POSIX(https://pubs.opengroup.org/onlinepubs/9799919799/functions/lseek.html)
or Windows FSCTL_QUERY_ALLOCATED_RANGES
(https://learn.microsoft.com/en-us/windows/win32/api/winioctl/ni-winioctl-fsctl_query_allocated_ranges).
We need that because people have tried to copy sparse file before, and
it either RUINED the files (by making them non-sparse, the holes were
filled-in with 0 byte data), or copies took forever because the holes
in sparse files are very large (e.g. multi TB size).
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