/usr/local/src/C-Menu/src/enterchr.c

key=$(enterchr "Are you sure?: ")
if [ "$key" = "Y" ]; then
    echo "You entered Y"
else
    echo "You entered N"
fi

 
#include "cm.h"
#include <fcntl.h>
#include <stdbool.h>
#include <string.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <unistd.h>
 
#ifdef __USE_GNU_GETTEXT
#include <libintl.h>
#define _(String) gettext(String)
#define gettext_noop(String) String
#define N_(String) gettext_noop(String)
#else
#define _(String) (String)
#define N_(String) String
#define textdomain(Domain)
#define bindtextdomain(Package, Directory)
#endif


int main(int argc, char **argv) {
    char c = 'Y';
    char *msg;
    struct termios raw_tioctl;
    char emsg[128];
 
    if (argc < 2)
        strcpy(emsg, _("Press any key"));
    else
        strcpy(emsg, argv[1]);
    capture_shell_tioctl();
    raw_tioctl = shell_tioctl;
    mk_raw_tioctl(&raw_tioctl);
    tcflush(0, TCOFLUSH);
    while (1) {
        msg = emsg;
        while (*msg) {
            write(2, msg++, 1);
        }
        if (read(0, &c, 1) > 0) {
            write(1, &c, 1);
            break;
        }
    }
    restore_shell_tioctl();
    if (c == (char)0x1b)
        return (1);
    return (0);
}