Creating directory in c

Question

I am working on some c code and am trying to programmatically create a directory. I found a while ago the mkdir(file, "w+) function to make the directory writable once its created but I've just noticed its creating a warning when compiled

warning: passing argument 2 of âmkdirâ makes integer from pointer without a cast

Below is the code I am using

void checkLogDirectoryExistsAndCreate()
{
    struct stat st;
    char logPath[FILE_PATH_BUF_LEN];
    sprintf(logPath, "%s/logs", logRotateConfiguration->logFileDir);
    if (stat(logPath, &st) != 0)
    {
        printf("Making log directory\n");
        mkdir(logPath, "w+");
    }
}

Thanks for any help you can provide.

Solution 1

According to this manpage, the 2nd parameter is a mode_t, which is a numeric type and gives the wanted access mode of the directory. Here you should provide 0777, an octal number meaning all of r, w and x, and this is restricted by the umask.

I don't know which of these informations apply to Windows.

Solution 2

The second argument of mkdir should be of type mode_t. The chmod man page lists available modes (which can be OR'd together).

Solution 3

The second parameter of the mkdir function is not a string. It's a flag combination to define the mode.

See the mkdir manual page for more information. See sys/stat.h for the complete flag list (search for "S_IRWXU")