lstat() 을 이용, 디렉토리 구분이 안되요.

#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <unistd.h>
#include <errno.h>
 
 
int main(int argc, char **argv)
{
    char *path;
    struct stat stat_p;
    int err;
    DIR *srcdir;
    struct dirent *pent;
    char fileName[4096];
 
    if (argc < 2 ) {
        printf("./a.out <dirname>\n");
        exit(0);
    }
    path = argv[1];
 
    srcdir = opendir(path);
    while(( pent = readdir(srcdir)) != NULL) {
        snprintf(fileName, 4096, "%s/%s", path, pent->d_name);
        printf("filename '%s' ==>", fileName);
        //err = lstat(fileName, &stat_p);
        err = lstat(pent->d_name, &stat_p);
 
 
        if ( err == -1 ) {
            printf("err = %d : %d : %s\n", err, errno, strerror(errno));
        }
        else {
            if ( S_ISREG(stat_p.st_mode) ) {
                printf("reg!\n");
            }
            else if ( S_ISDIR(stat_p.st_mode) ) {
                printf("dir\n");
            }
            else {
                printf("other\n");
            }
        }
    }
    return 0;
}