[Bug 13317] rsync returns success when target filesystem is full

[samba-bugs at samba.org]

https://bugzilla.samba.org/show_bug.cgi?id=13317

--- Comment #6 from Rui DeSousa <rui.desousa at icloud.com> ---
(In reply to Rui DeSousa from comment #5)

It looks like no error is returned and result is a sparse file. I think a
sync() would be required otherwise the file is truncated on close to meet the
quota.  

[postgres at hades ~]$ df -h arch 
Filesystem                  Size    Used   Avail Capacity  Mounted on
hydra/home/postgres/arch    1.0G    1.0G    316K   100%   
/usr/home/postgres/arch

[postgres at hades ~]$ rsync -av --inplace 000000010000005E00000017
arch/000000010000005E00000017
sending incremental file list
000000010000005E00000017

sent 67,125,370 bytes  received 35 bytes  8,950,054.00 bytes/sec
total size is 67,108,864  speedup is 1.00
[postgres at hades ~]$ ls -lh  arch/000000010000005E00000017
-rw-------  1 postgres  postgres    64M Mar  5 16:02
arch/000000010000005E00000017
[postgres at hades ~]$ du -h  arch/000000010000005E00000017
362K    arch/000000010000005E00000017


Here's example of dd exceeding the quota; however, it ends up with a truncated
file instead of it being sparse.  

[postgres at hades ~/arch]$ dd if=/dev/random of=test.dmp bs=256k
^C3080+0 records in
2+6156 records out
807403520 bytes transferred in 10.843296 secs (74461081 bytes/sec)
[postgres at hades ~/arch]$ ls -lh test.dmp 
-rw-r--r--  1 postgres  postgres   384K Mar  5 18:05 test.dmp
[postgres at hades ~/arch]$ du -h test.dmp 
393K    test.dmp

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