check directory tree in c/c++

[abraxas334]

I need to check if a directory tree exists.
Essentially i want to check top directory if it doesn't exist create it. Then check if first subdirectory exists if it doesn't create it etc.
I wrote a little test program to try this out. I can verify the existance of the top directory as well as creating it. But if i want to check the subdirectory I fail. I use chdir() how can i get a right answer for my subdirectory.
I created a directory called test, which has a subdirectory subdir using mkdir on the commandline. Here my program trying to check if subdir actually exists:



#include <iostream>
#include <string>

using namespace std;


int main()
{

string n = "test";
if(chdir(n.c_str())==0)
{
cout<<"This directory exists "<<endl;
}
else
{
cout<<"This does not exist"<<endl;
}
string n1 = "test/subdir";
if(chdir(n1.c_str())==0)
{
cout<<"Sub dir also exisits "<<endl;
}
else
{
cout<<"Pustekuchen"<<endl;
}

}

[Arndt]

I need to check if a directory tree exists.
Essentially i want to check top directory if it doesn't exist create it. Then check if first subdirectory exists if it doesn't create it etc.
I wrote a little test program to try this out. I can verify the existance of the top directory as well as creating it. But if i want to check the subdirectory I fail. I use chdir() how can i get a right answer for my subdirectory.
I created a directory called test, which has a subdirectory subdir using mkdir on the commandline. Here my program trying to check if subdir actually exists:



#include <iostream>
#include <string>

using namespace std;


int main()
{

string n = "test";
if(chdir(n.c_str())==0)
{
cout<<"This directory exists "<<endl;
}
else
{
cout<<"This does not exist"<<endl;
}
string n1 = "test/subdir";
if(chdir(n1.c_str())==0)
{
cout<<"Sub dir also exisits "<<endl;
}
else
{
cout<<"Pustekuchen"<<endl;
}

}



When you have chdir'ed to "test", you should chdir to "subdir" next, not to "test/subdir", since you are already in "test".

[dwhitney67]

Use mkdir(), maybe even use stat(), but the latter is not really necessary.



man 3 mkdir
man 3 stat

[abraxas334]

thanks, I knew it was something silly like that. And indeed mkdir obviously also checks if it is there, and i am obviously using it to create the directory...coding past 10pm = my brain not functioning :P