Terminal radio player

terminalplayer.c

#include <ncurses.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>

typedef struct station {
    char name[256];
    char url[256];
} station;

station stations[256];
int stationCount;
int player = 0;
int devnull;

void load_stations() {
    FILE *stationsFile = fopen("stations.txt", "r");
    stationCount = 0;
    char line[2048];
    while (fgets(line, 2048, stationsFile)) {
        int seperatorPos = strchr(line, '|')-line;
        strncpy(stations[stationCount].name, line, seperatorPos);
        strncpy(stations[stationCount].url, line+seperatorPos+1, strlen(line)-seperatorPos-2);
        stationCount++;
    }
}

void play_url(char *url) {
    if (player != 0) {
        kill(player, SIGTERM);
    }
    signal(SIGCHLD, SIG_IGN);
    player = fork();
    if (player == 0) {
        // Child process
        dup2(devnull, 1);
        dup2(devnull, 2);
        execl("/usr/bin/mplayer", "mplayer", url);
    }
}

int main() {
    initscr();
    noecho();
    cbreak();
    keypad(stdscr, TRUE);
    curs_set(FALSE);
    start_color();
    
    init_pair(1, COLOR_WHITE, COLOR_BLACK);
    init_pair(2, COLOR_CYAN, COLOR_BLACK);
    
    devnull = open("/dev/null", O_RDONLY);
    
    load_stations();
    int key = 0;
    int selectedStation = 0;
    while (1) {
        if (key == KEY_DOWN) {
            selectedStation++;
            selectedStation = selectedStation % stationCount;
        }else if (key == KEY_UP) {
            selectedStation--;
            if (selectedStation < 0) {
                selectedStation = stationCount-1;
            }
        }else if (key == KEY_RIGHT || key == '\n') {
            play_url(stations[selectedStation].url);
        }else if (key == 's') {
            if (player != 0) {
                kill(player, SIGTERM);
                player = 0;
            }
        }else if (key == 'q') {
            if (player != 0) {
                kill(player, SIGTERM);
            }
            endwin();
            return 0;
        }
        
        clear();
        for (int i=0;i<stationCount;i++) {
            move(i, 2);
            if (i == selectedStation) {
                attrset(COLOR_PAIR(2));
                printw("---> ");
            }else {
                attrset(COLOR_PAIR(1));
                printw("     ");
            }
            printw("%d. %s", i+1, stations[i].name);
        }
        attrset(COLOR_PAIR(1));
        printw("\n\n");
        printw("Terminal Radio\n");
        printw("Up-Down > Select Station | Enter > Play selected station | q > Quit | s > Stop");
        key = getch();
    }
    
    endwin();
}