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SFTP - Overwrite [Put -P <file>] option

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# 1  
Old 03-26-2010
Question SFTP - Overwrite [Put -P <file>] option
Hi All Experts,

I hope you are all ok! Smilie

My question is simple but I was not able to find an answer in the internet, and that's why I am here!

My question is: when I sftp to a server and use "put -P" option to put a file, it keeps the file's full permission and access time. Check below what sftp's man page says about it: "If the -P flag is specified, then the file's full permission and access time are copied too."

What I need is to overwrite the "-P" option in the server side, I mean, I need to change the access time to the current time, is like the client not used the "-P" option.

Is there a way to do it? Smilie

Below there is an example(of course you know it):
Code:
$ sftp USER@SERVER
Connecting to SERVER...
Password:
sftp> put -P FILE.log.2009-10-21
Uploading FILE.log.2009-10-21 to /PATH_TO_FILE/FILE.log.2009-10-21
FILE.log.2009-10-21                                                                                                                      100%  855     0.8KB/s   00:00
sftp> ls -l
-rwxrwxrwx    1 USER   GRP           855 Oct 21 12:46 FILE.log.2009-10-21
sftp> rename FILE.log.2009-10-21 FILE.log.2009-10-21.keep
sftp> ls -l
-rwxrwxrwx    1 USER   GRP           855 Oct 21 12:46 FILE.log.2009-10-21.keep
sftp> put FILE.log.2009-10-21
Uploading FILE.log.2009-10-21 to /PATH_TO_FILE/FILE.log.2009-10-21
FILE.log.2009-10-21                                                                                                                      100%  855     0.8KB/s   00:00
sftp> ls -l
-rwxr-xr-x    1 USER   GRP           855 Mar 26 17:23 FILE.log.2009-10-21
-rwxrwxrwx    1 USER   GRP           855 Oct 21 12:46 FILE.log.2009-10-21.keep
sftp>

As you saw, it kept the access time when I used the -P option, and changed the access time when I did not use it.

Again, what I need is whenever the client uses the -P option, the server ignores it and changes the access time.

That's it!

Thanks for your attention and help!

Regards!
# 2  
Old 03-29-2010
Nobody know it?
# 3  
Old 03-29-2010
Afaik there is no option for the sshd (sshd_config) on the receiving side to ignore -P from a client's put.
Try to make sure the clients don't use that -P option.

An awkward procedure might be to set up a little script in crontab that stats a file a client has transfered with -P, parse the change time and touch the file with it:
Code:
$> stat ~/infile
  File: »/root/infile«
  Size: 0               Blocks: 0          IO Block: 4096   regular empty file
Device: 805h/2053d      Inode: 424849      Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2010-03-29 14:22:42.000000000 +0200
Modify: 2010-03-25 16:16:05.000000000 +0100
Change: 2010-03-29 14:30:24.000000000 +0200



---------- Post updated at 02:43 PM ---------- Previous update was at 02:34 PM ----------

Parsing the date for the touch command could look like this:
Code:
stat ./infile| awk -F"[ .:]" '/^Change:/ {gsub(/-/,"",$3); print $3$4$5$6}'
20100325161605
# so we go for
touch -t=`stat ./infile| awk -F"[ .:]" '/^Change:/ {gsub(/-/,"",$3); print $3$4$5$6}'` infile

Last edited by zaxxon; 03-29-2010 at 09:44 AM.. Reason: update, more help
# 4  
Old 03-29-2010
Hi zaxxon,

Thanks for the reply and sorry about bumping Up my post! I am not going to do that again.

Regards.
# 5  
Old 03-29-2010
No problem - did one of the two suggestions help?
# 6  
Old 03-29-2010
Yes! Both of them! Now I have to choose one. =0)

Thanks again.
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