Error: User's directory already exists?

[A. Yahya Sjarifuddin]

Dear All,
What is actually TmpBuf1?
taken from vpopmail.c

...
#define MAX_BUFF 300
static char Crypted[MAX_BUFF];
static char TmpBuf[MAX_BUFF];
static char
TmpBuf1[MAX_BUFF];                                                                     
                                                          
...
if ( mkdir(username, 448) != 0 ) {
        chdir(TmpBuf1);
        return(VA_EXIST_U_DIR);
}                                                                                      
                                                              
...
case VA_EXIST_U_DIR:
        return("User's directory already
exists?");