Jimmy devices scanner

jim_devices.c

#include <stdio.h>                                                                                    
#include <stdlib.h>                                                                                   
#include <fcntl.h>                                                                                    
#include <dirent.h>                                                                                   
                                                                                                      
int count_usb(char**);                                                                                
                                                                                                      
char* arr[50] = {};                                                                                   
char **ptr = arr;                                                                                     
                                                                                                      
int main(int argc, char** argv) {                                                                     
  int x, devices;                                                                                     
  argc > 1 ? devices = count_usb(argv[1]) : exit(0);                                                  
  if (devices < 1) {                                                                                  
    printf("Can't find devices in used!\n");                                                          
    return EXIT_FAILURE;                                                                              
  }                                                                                                   
  printf("devices count: %d\n", devices);                                                             
  for (x = 0; x < devices; x++) {                                                                     
    if (ptr[x] != NULL) printf("string %d : %s\n", x+1, ptr[x]);                                      
  }                                                                                                   
  return EXIT_SUCCESS;                                                                                
}                                                                                                     
                                                                                                      
int count_usb(char** target) {                                                                        
  DIR *d;                                                                                             
  struct dirent *dir;                                                                                 
  unsigned int returnSize = 0;                                                                        
  d = opendir("/dev/");                                                                               
  if (d) {                                                                                            
    while ((dir = readdir(d)) != NULL) {                                                              
      char *check;                                                                                    
      check = strstr(dir->d_name, target);                                                            
      ptr[returnSize] = check;                                                                        
      check != NULL ? puts(check), returnSize++ : returnSize+0;                                       
    }                                                                                                 
    return returnSize;                                                                                
  } else {                                                                                            
    puts("found nothing");                                                                            
    return -1;                                                                                        
  }                                                                                                   
}