Programming

test2.c: In function âkbd_rdâ:
test2.c:28: error: âfd_setâ undeclared (first use in this function)
test2.c:28: error: (Each undeclared identifier is reported only once
test2.c:28: error: for each function it appears in.)
test2.c:28: error: expected â;â before âset_readâ
test2.c:29: warning: ISO C90 forbids mixed declarations and code
test2.c:32: error: variable âtv_tmoutâ has initializer but incomplete type
test2.c:32: warning: excess elements in struct initializer
test2.c:32: warning: (near initialization for âtv_tmoutâ)
test2.c:32: warning: excess elements in struct initializer
test2.c:32: warning: (near initialization for âtv_tmoutâ)
test2.c:32: error: storage size of âtv_tmoutâ isnât known
test2.c:34: warning: implicit declaration of function âFD_ZEROâ
test2.c:34: error: âset_readâ undeclared (first use in this function)
test2.c:35: warning: implicit declaration of function âFD_SETâ
test2.c:36: warning: implicit declaration of function âselectâ
test2.c:37: warning: implicit declaration of function âFD_ISSETâ
test2.c:32: warning: unused variable âtv_tmoutâ
test2.c: In function âmainâ:
test2.c:50: warning: implicit declaration of function âfilenoâ

#include <termios.h>
#include <stdio.h>

static struct termios termold;

void
echo_off(void) {
        struct termios t;
        (void) tcgetattr(0, &termold);
        t = termold;
        t.c_lflag &= ~(ICANON | ECHO);
        t.c_cc[VMIN] = 1;
        t.c_cc[VTIME] = 0;
        (void) tcsetattr(0, TCSANOW, &t);
}

void
echo_on(void) {
        (void) tcsetattr(0, TCSANOW, &termold);
}

void
read_unbuffered(void) {
        int ch;
        setbuf(stdin, NULL);
        echo_off();
        while ((ch = getchar()) != '\n') {
             putchar('*');
        }
        echo_on();
}

int
main() {
        read_unbuffered();
}