Re: Robustness: sometimes write times after having renamed the temp file

[Guillaume Outters]

Le 2016-11-30 11:19, Henri Shustak a écrit :


I believe some work on this was happening at one point in rsync (not
specific to OS X).


I would be interested to know which problematic cases motivated this 
work; I did not find trace of it in the source.


In terms of your issues specifically, would the fuzzy option possibly 
help you?


Hmm, no, it doesn't do anything.
fuzzy would help on naming problems; in the "dest is UDF" case (with 
the default, --no-inplace, mode: 'file' gets tranfered as 
'.file.XX', then renamed to 'file'):

- the name is correctly renderered
- but the timestamps are not (well, they are transfered, but then reset 
to 'now' by the FS during the final renaming)


Thus my patch to swap the timestamping with the renaming when it is 
detected that the FS has this flaw.


--
Guillaume

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Re: Robustness: sometimes write times after having renamed the temp file

[Henri Shustak]

I believe some work on this was happening at one point in rsync (not specific 
to OS X).

In terms of your issues specifically, would the fuzzy option possibly help you?

> --fuzzy find similar file for basis if no dest file


Could you report if it makes a difference for your use case?

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segfault at 968 Error

[VigneshDhanraj G]

Hi Team,

While Running rsync rsync://username@ip:873 , I am getting following error.

rsync: safe_read failed to read 1 bytes [Receiver]: Connection reset by
peer (104)
rsync error: error in rsync protocol data stream (code 12) at io.c(276)
[Receiver=3.1.1]

In Remote pc , i can see segmentation fault, dmesg gives following error.
My remote PC using debian wheezy.

rsync[9022]: segfault at 968 ip 7f90001cd790 sp 7fffe96008a0 error
4 in libpthread-2.13.so[7f90001c8000+17000]

gdb output: bt

(gdb) bt
#0  0x7fa75e8ab790 in __pthread_initialize_minimal_internal () from
/lib/x86_64-linux-gnu/libpthread.so.0
#1  0x7fa75e8ab209 in _init () from
/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x7fa75e6a in ?? ()
#3  0x7fa75f967f09 in ?? () from /lib64/ld-linux-x86-64.so.2
#4  0x7fa75f9680ce in ?? () from /lib64/ld-linux-x86-64.so.2
#5  0x7fa75f96c333 in ?? () from /lib64/ld-linux-x86-64.so.2
#6  0x7fa75f967ba6 in ?? () from /lib64/ld-linux-x86-64.so.2
#7  0x7fa75f96bb1a in ?? () from /lib64/ld-linux-x86-64.so.2
#8  0x7fa75efe5760 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#9  0x7fa75f967ba6 in ?? () from /lib64/ld-linux-x86-64.so.2
#10 0x7fa75efe57ff in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#11 0x7fa75efe58f7 in __libc_dlopen_mode () from
/lib/x86_64-linux-gnu/libc.so.6
#12 0x7fa75efbee94 in __nss_lookup_function () from
/lib/x86_64-linux-gnu/libc.so.6
#13 0x7fa75efbf6ab in __nss_next2 () from
/lib/x86_64-linux-gnu/libc.so.6
#14 0x7fa75efc5666 in gethostbyaddr_r () from
/lib/x86_64-linux-gnu/libc.so.6
#15 0x7fa75efcae1d in getnameinfo () from
/lib/x86_64-linux-gnu/libc.so.6
#16 0x00441002 in lookup_name ()
#17 0x00440e3b in client_name ()
#18 0x0044d566 in start_daemon ()
#19 0x0043eb74 in start_accept_loop ()
#20 0x0044da7e in daemon_main ()
#21 0x00425751 in main ()

strace output which shows segmentation fault.
7241  read(5,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\3008\0\0\0\0\0\0"..., 832)
= 832
7241  fstat(5, {st_mode=S_IFREG|0644, st_size=80712, ...}) = 0
7241  mmap(NULL, 2185864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
5, 0) = 0x7fd406a88000
7241  mprotect(0x7fd406a9b000, 2093056, PROT_NONE) = 0
7241  mmap(0x7fd406c9a000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0x12000) = 0x7fd406c9a000
7241  mmap(0x7fd406c9c000, 6792, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fd406c9c000
7241  close(5)  = 0
7241  mprotect(0x7fd406c9a000, 4096, PROT_READ) = 0
7241  mprotect(0x7fd406ea2000, 4096, PROT_READ) = 0
7241  set_tid_address(0x7fd4080809d0)   = 7241
7241  --- SIGSEGV (Segmentation fault) @ 0 (0) ---
6080  <... select resumed> )= ? ERESTARTNOHAND (To be restarted)
6080  --- SIGCHLD (Child exited) @ 0 (0) ---
6080  wait4(-1, NULL, WNOHANG, NULL)= 7241
6080  wait4(-1, NULL, WNOHANG, NULL)= -1 ECHILD (No child processes)
6080  rt_sigreturn(0x)  = -1 EINTR (Interrupted system call)
6080  select(5, [4], NULL, NULL, NULL 

so, i have upgraded rsync to latest in my remote pc, but problem not get
solved.
Please help me to solve this.

Regards,
Vigneshdhanraj G
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