Programming

Hi

I am creating a utility which needs to create a log file under the path represented by an environment variable. The condition is that this path must be a valid DIRECTORY PATH. So i need to determine that the path is indeed a VALID DIRECTORY PATH.
I have written a function which will return me the stat structure of the PATH using lstat. Can anyone help me with a sample C or C++ code which parses through the UNIX STAT structure and determines if it indeed represents a directory only.
<sys/stat.h>

Thanks

First off, assuming I understand what you have done, you called lstat against a link to a directory? lstat() works against links.

Do you know about the access() function? That may be what you really want.

Otherwise call readlink(), get the names of the directories (we hope they are) that make up the path, call stat() for each one, first for /dir1/dir2, then /dir1.

Code:

int isdir(char *fname)
{
    struct stat st;
    if(stat(fname, &st)!=-1)
       return S_ISDIR(st.st_mode);
    else
    {
         perror("Cannot stat file");
         exit(1);
    }
}

However a one liner is all you need.

Code:

 
 if( access(linkfilename, X_OK)==0)
       /* okay you can access the files under the directory*/

Many Thanks Jim !!!!