( C++ )

igor@44 · 08-02-2005, 07:04 AM

I need to write program that writes something into /home/{username}/... but I don't know how to make program find that username. I'm writting this program in C++

maroonbaboon · 08-02-2005, 08:42 AM

Use the 'getenv' system call to get the value of the environment variable USER.

igor@44 · 08-03-2005, 05:19 AM

Can you give me so me example for "getenv"?

Maybe something like this:

Code:

var env_user    = getenv("USER");

maroonbaboon · 08-03-2005, 07:15 AM

Sorry, I'm not a C++ user, but here is a complete C program:

Code:

#include <stdlib.h>
main() 
{
  printf(getenv("USER"));
}

coolguy_iiit · 08-03-2005, 07:19 AM

dude check man getenv

if u still dont know how to use getenv...try posting ur problem in linux-programming..

bye

geeman2.0 · 08-03-2005, 09:28 AM

Couldn't you just write to "~/filename"
I know in the shell ~ gets mapped to /home/username.
Would this functionality carry over into c++?

KimVette · 08-03-2005, 10:01 AM

Several ways to get the home directory:

$HOME
~
just "cd" with no argument (if you're doing a shellexec or equivalent)

several ways to get the user:

whoami
$USER
(see source for "whoami" to see what calls that program does if shellexec or equivalent is not for you)

igor@44 · 08-03-2005, 02:11 PM

I wanted to make C++ program that copies itself into ~/.kde/Autostart. Here is my code:

Code:

main() 
{
CopyFile("~/Desktop/what.txt, "~/Dekstop/what3.txt", false);
}

But when I try to compile this in gcc (can gcc compile C++ code?) it says me:
autostart.c: In function `main':
autostart.c:3: error: parse error before '~' token
autostart.c:3:51: missing terminating " character
What can I do now?