c - Read first line from file and access this path -

i'm writing code reads first line file, line includes path directory. list_dir() function enter subfolders.. checked list_dir() , it's works great when i'm sending path manually - example: list_dir ("/home/desktop/example");

here code:

#include <stdio.h> #include <stdlib.h> #include <dirent.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <string.h> #include <errno.h> #include <dirent.h> #include <limits.h>  static void list_dir (const char *dirpath) {     // open directory in dir_name     dir *d;     d = opendir (dirpath);     /* check opened. */     printf("%s",dirpath);     if (!d) {         printf ("cannot open directory\n");         exit (1);     }      while (1) {         struct dirent * entry;         const char * d_name;          /* "readdir" gets subsequent entries "d". */         entry = readdir (d);         /* if there no more entries in directory */         if (!entry) {             break;         }          /* print name of file , directory. */         d_name = entry->d_name;         printf ("%s/%s\n", dirpath, d_name);          if (entry->d_type & dt_dir) {             /* check directory not "d" or d's parent. */             if (strcmp (d_name, "..") != 0 && strcmp (d_name, ".") != 0) {                 int path_length;                 char path[path_max];                 path_length = snprintf (path, path_max,"%s/%s", dirpath, d_name);                 printf ("%s\n", path);                 if (path_length >= path_max) {                     fprintf (stderr, "path length has got long.\n");                     exit (exit_failure);                 }                 /* recursively call "list_dir" new path. */                 list_dir(path);             }         }     }      /* after going through entries, close directory. */     if (closedir (d)) {         printf ("cannot close directory");         exit (1);     } }   void main(int argc, char *argv[]) {     //configuration file path     char* dirpath = argv[1];      file *f1 = fopen(dirpath, "r");     if (f1 == null) {         printf("cannot open file reading");         exit(1);     }      char *line = null;     size_t len = 0;     ssize_t read;      while ((read = getline(&line, &len, f1)) != -1) {         break;     }      list_dir (line);     fclose (f1);     free(line); } 

example txt file:

/home/desktop/example/ bla bla bla bla bla bla 

as understand, problem when i'm sending path main() function, list_dir() can't open path , "cannot open directory" error. help?

as commenters above said there newline @ end of dirpath , that's why cannot open directory, add strtok(dirpath, "\n"); before opendir rid of trailing newline.

also note including headers more once , main should return int.