ii managed the btty file with less open/close. - iomenu - interactive terminal-based selection menu
 (HTM) git clone git://bitreich.org/iomenu git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/iomenu
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       ---
 (DIR) commit 601965c26a8164917e4b817273a5af3c901bc98f
 (DIR) parent 70864688887921021de8ce2b803fdd4206214cda
 (HTM) Author: Josuah Demangeon⠠⠵ <mail@josuah.net>
       Date:   Sun, 19 Mar 2017 17:19:49 +0100
       
       ii
       managed the btty file with less open/close.
       
       Diffstat:
         M iomenu.c                            |      67 ++++++++++++++++++-------------
       
       1 file changed, 39 insertions(+), 28 deletions(-)
       ---
 (DIR) diff --git a/iomenu.c b/iomenu.c
       @@ -19,6 +19,8 @@
        
        static struct winsize winsize;
        static struct termios termios;
       +FILE *tty_fp = NULL;
       +int   tty_fd;
        
        static char   input[BUFSIZ];
        static int    current = 0, offset = 0, prev = 0, next = 0;
       @@ -29,35 +31,43 @@ static int    opt_lines = 0;
        
        
        static void
       -free_v(char **v, int c)
       +free_all(void)
        {
       -        for (; c > 0; c--)
       -                free(v[c - 1]);
       -
       -        free(v);
       +        if (linev) {
       +                for (; linec > 0; linec--)
       +                        free(linev[linec - 1]);
       +                free(linev);
       +        }
       +        if (matchv)
       +                free(matchv);
        }
        
        
        static void
        die(const char *s)
        {
       -        /* tcsetattr(STDIN_FILENO, TCSANOW, &termio_old); */
       -        fprintf(stderr, "%s\n", s);
       +        tcsetattr(tty_fd, TCSANOW, &termios);
       +        fclose(tty_fp);
       +         close(tty_fd);
       +        free_all();
       +        perror(s);
                exit(EXIT_FAILURE);
        }
        
        
        static void
       -set_terminal(int tty_fd)
       +set_terminal(void)
        {
       -        if (tcgetattr(tty_fd, &termios) < 0) {
       +        struct termios new;
       +
       +        if (tcgetattr(tty_fd, &termios) < 0 || tcgetattr(tty_fd, &new) < 0) {
                        perror("tcgetattr");
                        exit(EXIT_FAILURE);
                }
        
       -        termios.c_lflag &= ~(ICANON | ECHO | IGNBRK);
       +        new.c_lflag &= ~(ICANON | ECHO | IGNBRK);
        
       -        tcsetattr(tty_fd, TCSANOW, &termios);
       +        tcsetattr(tty_fd, TCSANOW, &new);
        }
        
        
       @@ -178,7 +188,7 @@ print_columns(void)
        
        
        static void
       -print_screen(int tty_fd)
       +print_screen(void)
        {
                int count;
        
       @@ -292,7 +302,7 @@ print_selection(void)
         * Perform action associated with key
         */
        static int
       -input_key(FILE *tty_fp)
       +input_key(void)
        {
                char key = fgetc(tty_fp);
        
       @@ -348,21 +358,18 @@ input_key(FILE *tty_fp)
         * Listen for the user input and call the appropriate functions.
         */
        static int
       -input_get(int tty_fd)
       +input_get(void)
        {
       -        FILE *tty_fp = fopen("/dev/tty", "r");
                int   exit_code;
        
                input[0] = '\0';
        
       -        set_terminal(tty_fd);
       +        set_terminal();
        
       -        while ((exit_code = input_key(tty_fp)) == CONTINUE)
       -                print_screen(tty_fd);
       +        while ((exit_code = input_key()) == CONTINUE)
       +                print_screen();
        
       -        set_terminal(tty_fd);
       -
       -        fclose(tty_fp);
       +        tcsetattr(tty_fd, TCSANOW, &termios);
        
                return exit_code;
        }
       @@ -380,9 +387,9 @@ usage(void)
        int
        main(int argc, char *argv[])
        {
       -        int i, exit_code, tty_fd = open("/dev/tty", O_RDWR);
       +        int exit_code;
        
       -        for (i = 1; i < argc; i++) {
       +        for (int i = 1; i < argc; i++) {
                        if (argv[i][0] != '-' || strlen(argv[i]) != 2)
                                usage();
        
       @@ -403,13 +410,17 @@ main(int argc, char *argv[])
        
                read_lines();
        
       -        print_screen(tty_fd);
       -        exit_code = input_get(tty_fd);
       +        tty_fp = fopen("/dev/tty", "r");
       +        tty_fd =  open("/dev/tty", O_RDWR);
        
       +        print_screen();
       +        exit_code = input_get();
       +
       +        tcsetattr(tty_fd, TCSANOW, &termios);
                print_clear(opt_lines);
       -        close(tty_fd);
       -        free_v(linev, linec);
       -        free(matchv);
       +        fclose(tty_fp);
       +         close(tty_fd);
       +        free_all();
        
                return exit_code;
        }