iomenu

interactive text selection menu
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commit 601965c26a8164917e4b817273a5af3c901bc98f
parent 70864688887921021de8ce2b803fdd4206214cda
Author: Josuah Demangeonā  ā µ <mail@josuah.net>
Date:   Sun, 19 Mar 2017 17:19:49 +0100

ii
managed the btty file with less open/close.

Diffstat:
Miomenu.c | 67+++++++++++++++++++++++++++++++++++++++----------------------------
1 file changed, 39 insertions(+), 28 deletions(-)

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; }