Create files without lunching the program as superuser

[Sora-Kun]

Hello,
I'm asking this question for those who know Linux systems 
Please, when I lunch my program created in Lazarus, and my program create files in some directories, while creating these files, I receive an error message saying "Unable to create file '........../..../...py' " note that I use the command "MemoX.Savetofile('xxxxxxxx/xxxx/xx.py')"
Please HELP 
Thanks

[Bart]

Hello,
I'm asking this question for those who know Linux systems 
Please, when I lunch my program created in Lazarus

Only at lunch, or also at dinner? 

and my program create files in some directories,

What directory? Please specify.

while creating these files, I receive an error message saying "Unable to create file '........../..../...py' " note that I use the command "MemoX.Savetofile('xxxxxxxx/xxxx/xx.py')"

Please quote the exact error message.
Do I understand correctly that the filename in the errormessage is different from the filename specified in the code?

What value does GetLastOSError return?

Bart

[Sora-Kun]

Hello, i didn't eat my breakfast, that's why I make some writing mistakes 
Any way, Here is the thing, in my program µ.dev, when the user launch the code, my program creates the next file: _{GetAppConfigDir(True)+'file.py'}
here is the full code: <sup>pypath := Memo1.Text;
SynEdit1.Lines.SaveToFile(temp1);
SynEdit1.BlockBegin:= SynEdit1.CaretXY;
if not (pypath = '') then
begin
if aa = false then
 begin
       Process1.CommandLine:= pypath + ' '+temp1;
       Process1.Execute;

       end
 else
       Process1.CommandLine:= temp1;
       Process1.Execute;
 end
else
 MessageDlg('No Python path selected',mtCustom, [mbOK], 0);
end;</sup>     
When i press the "Launch" button I receive the next error message: «Unable to create file "etc/u.dev/file.py" press OK to ignore the risk data corruption Press Cancel to quit the program»
I'm under Ubuntu 10.2
Please HELP 

[Laksen]

GetAppConfigDir(true) returns the global dir for application configuration files. You generally need elevated privileges to write in this directory in all operating systems

What you probably want is either a temp dir(GetTempDir/GetTempFileName) or the user local application config directory(GetAppConfigDir(false))

[Sora-Kun]

Thanks , and this meen that there is no way to solve my probleme but launch the program as super-user  ...

[Ñuño_Martínez]

Thanks , and this meen that there is no way to solve my probleme but launch the program as super-user  ...

No: This mean that your program doesn't use the appropriate directories. The way to solve your problem is to use different file distribution. Think about why does your program need to create these files, then decide where to create them.

BTW if your application needs to save configuration, it should save it in the user's work directory (/home/<user> in Linux, C:/Documents and settings/<user> in Windows, etc.). Global configuration should be created by the system administrator and it shouldn't be modified by your program. Your program should use it only if there isn't an user configuration file.

[Sora-Kun]

is there any way to know the user's work directory ?

[Bart]

GetEnvironmentVariable('HOME') ?

Bart

[Sora-Kun]

euuh, what does this return ? and how can I use it 

[Laksen]

What are you saving anyway? Why don't you let the user save the file, or just save it under a temporary filename using GetTempFileName?

[exdatis]

try:
man chmod # for more information
chmod 777 /path/file. #read,write,execute(777)
for any file
chmod 777 -R /path/to/folder/    # -R -recursive
or simple right_click properties and set property

[Ñuño_Martínez]

is there any way to know the user's work directory ?

Use GetUserDir function.

The HOME environment variable doesn't exists in some systems (i.e. Windows, DOS, OS/2, etc.).

[Bart]

euuh, what does this return ? and how can I use it 

Euuh, it returns the users work directory (at least on linux, which you were asking about).

Bart