stat 구조체와 chdir()

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <dirent.h>
#include <sys/stat.h>
typedef struct dirent   DIRENT;
typedef struct dirent*  PDIRENT;
typedef struct stat     STAT;
char *target;
int dirFilter(PDIRENT entry) {
    STAT res;
    stat(entry->d_name, &res);
    if (S_ISDIR(res.st_mode)) 
        return !(strcmp(entry->d_name, ".")==0 || strcmp(entry->d_name, "..")==0);
    else 
        return strcmp(target, entry->d_name)==0;
}
void find(char *path) {
    PDIRENT *nameList;
    int fileCount = scandir(path, &nameList, dirFilter, NULL);
    chdir(path);
    for(int i=0;i<fileCount;i++) {
        STAT res;
        stat(nameList[i]->d_name, &res);
        if ( S_ISDIR(res.st_mode) )
            find(path);
        else
            printf("%s/%s\n", path, nameList[i]->d_name);
    }
    chdir("..");
}
int main(int argc, char **argv) {
    if(argc == 2) {
        target=argv[1];
        long dirLength = pathconf(".",_PC_PATH_MAX );
        char *curPath = malloc(sizeof(char)*dirLength);
        getcwd(curPath,dirLength);
        find(curPath);
    }
    else if (argc > 2) {
        target=argv[2];
        find(argv[1]);
    }
    return 0;