Problem with playing the next song automatically with SDL_Mixer - c

Question

I have this c program which used to search for the mp3 files of given directory and add the files data to linked list.i use SDL2 for audio handling. so much far i would be able to get the playing of mp3 file and what i'm facing here is that i don't know how to play the next song when the first song is played in the linked list.
Here is my code for the program.
#include <dirent.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "file_handle.h"
#include <SDL2/SDL.h>
#include <SDL2/SDL_mixer.h>
struct tags
{
const char *artist;
} tags;
Mix_Music *music = NULL;
bool loadmedia(char *filepath);
void play();
void init();
void load_file_directory(char *dir_path);
int main(int argc, char *argv[])
{
char *file_path;
if (argc <= 1)
{
fprintf(stderr, "no arguments provided!\n");
}
else
{
file_path = argv[2];
}
if (file_path)
{
load_file_directory(file_path);
}
init();
int count = 0;
for (struct song *node = head; node; node = node->next)
{
printf("%s\n", node->file_path);
}
for (struct song *node = head; node; node = node->next)
{
printf("%s\n", node->file_path);
printf("count is %d\n", count);
count++;
Mix_Music *song = Mix_LoadMUS(node->file_path);
if (Mix_PlayMusic(song, 1) != 0)
{
printf("something\n");
}
while (!SDL_QuitRequested())
SDL_Delay(250);
Mix_FreeMusic(song);
}
// char *file = argv[1];
// bool status = loadmedia(file);
// if(status){
// printf("%s - %s\n",Mix_GetMusicArtistTag(music),Mix_GetMusicTitleTag(music));
// if(Mix_PlayMusic(music,1)){
// printf("something wrong");
// Mix_FreeMusic(music);
// }
// }
// while(!SDL_QuitRequested())
// SDL_Delay(250);
}
bool loadmedia(char *file_path)
{
bool success = false;
if (file_path)
{
music = Mix_LoadMUS(file_path);
success = true;
}
else
{
printf("File Loaded Failed\n");
}
return success;
}
void init()
{
bool success;
if (SDL_Init(SDL_INIT_AUDIO) < 0)
{
printf("Couldn't initialize SDL: %s\n", SDL_GetError());
success = false;
}
if (Mix_Init(MIX_INIT_MP3) != MIX_INIT_MP3)
{
fprintf(stderr, "could not initialized mixer\n", Mix_GetError());
}
if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 2048) < 0)
{
printf("SDL_mixer could not be initialized %s\n", Mix_GetError());
success = false;
}
}