Can't create file with io.open in openresty

llaoolee · 2018-07-13T14:22:18+00:00

Server {....server_name www.domain1.com;....location /{ proxy_ssl_server_name on; proxy_ssl_verify off; proxy_ssl_name www.domain...

Can't create file with io.open in openresty

llaoolee

Simply doing something like this just won't work to make a new file:

local file = "newfile.txt"

local f = io.open(file, "w")

if f then

f:write("hello")

f:close()

end

I tried to put full path inside " " and I tried to put this lua file in different root directories of openresty, and also directly in nginx.conf, seem to be no access problem.

There's no output in access.log or error.log about it. And the file is not being created which is what I want (tried to search for it too) it's not being made. I've had no other issues so far. And OpenResty is Installed like it should be.

All Default and OpenResty running under root.

No idea what's the problem. Thanks if one has an answer.

jim.robinson

The documentation for io.open says "This function opens a file, in the mode specified in the string mode. It returns a new file handle, or, in case of errors, nil plus an error message."

So have you tried

f, err = io.open(file, "w")

and then checking 'err' if 'f' is nil?

llaoolee

Thank you! I have got the error: Permission denied, no clue though what it would be. May I have to re-set user/group access permission on my folders and subdirectories. I'll try and see, coming with a update soon.

On Fri, Jul 13, 2018 at 1:26 PM, Jim Robinson <jim.r...@gmail.com> wrote:

The documentation for io.open says "This function opens a file, in the mode specified in the string mode. It returns a new file handle, or, in case of errors, nil plus an error message."

So have you tried

f, err = io.open(file, "w")

and then checking 'err' if 'f' is nil?

.

llaoolee

Ah sneaky, found the issue! Thanks alot. All directories had correctly set permissions. I tried to output the .txt file to different directories with no result. Then lastly I figured, maybe I have to set user root; in my nginx.conf to solve this access problem, and voila! It worked. I had a pretty basic nginx.conf and I had no use of having user root; until now when I found out it was a requirement. Thanks for helping me find the issue! Problem solved.

On Fri, Jul 13, 2018 at 3:54 PM, Lim <lla...@gmail.com> wrote:

Thank you! I have got the error: Permission denied, no clue though what it would be. May I have to re-set user/group access permission on my folders and subdirectories. I'll try and see, coming with a update soon.

On Fri, Jul 13, 2018 at 1:26 PM, Jim Robinson <jim.r...@gmail.com> wrote:
The documentation for io.open says "This function opens a file, in the mode specified in the string mode. It returns a new file handle, or, in case of errors, nil plus an error message."

So have you tried

f, err = io.open(file, "w")

and then checking 'err' if 'f' is nil?

.