First of all, ^Z or ^D are control characters that mean something to the terminal you are using, and sometimes that means for the terminal to signal end-of-file condition. Anyway, your three keypresses are processed by the terminal to take the following actions, after entering text: Flush the input (i.e. send the characters that have … Read more
You’ve attempted to write to the output stream before you attempt to listen on the input stream, so it makes sense that you’re seeing nothing. For this to succeed, you will need to use separate threads for your two streams. i.e., import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.PrintWriter; import java.util.Scanner; public class … Read more
There isn’t a general solution to this problem. The best resource seems to be this mailing list thread. Basically, piping into a program connects the program’s stdin to that pipe, rather than to the terminal. The mailing list thread has a couple of relatively simple solutions for *nix: Open /dev/tty to replace sys.stdin: sys.stdin = … Read more
Note that since Kotlin 1.6 readLine()!! should be replaced with readln(). Here are A+B examples in Kotlin reading from stdin: fun main() { val (a, b) = readLine()!!.split(‘ ‘) println(a.toInt() + b.toInt()) } or fun main(vararg args: String) { val (a, b) = readLine()!!.split(‘ ‘).map(String::toInt) println(a + b) } or fun readInts() = readLine()!!.split(‘ ‘).map … Read more
The fileinput module may do what you want – assuming the non-option arguments are in args then: import fileinput for line in fileinput.input(args): print line If args is empty then fileinput.input() will read from stdin; otherwise it reads from each file in turn, in a similar manner to Perl’s while(<>).
The solution for me was to set -icanon mode on the TTY (using stty). Eg.: stty -icanon So, the the code that now works is: #!/usr/bin/php <?php system(“stty -icanon”); echo “input# “; while ($c = fread(STDIN, 1)) { echo “Read from STDIN: ” . $c . “\ninput# “; } ?> Output: input# fRead from STDIN: … Read more
Passing a value to standard input in Bash is as simple as: your-command <<< “$your_variable” Always make sure you put quotes around variable expressions! Be cautious, that this will probably work only in bash and will not work in sh.
The following is one of best ways to get it done. First get term package by go get golang.org/x/term package main import ( “bufio” “fmt” “os” “strings” “syscall” “golang.org/x/term” ) func main() { username, password, _ := credentials() fmt.Printf(“Username: %s, Password: %s\n”, username, password) } func credentials() (string, string, error) { reader := bufio.NewReader(os.Stdin) fmt.Print(“Enter … Read more
Portably, you can get the next character in the input stream with getchar() and then push it back with ungetc(), which results in a state as if the character wasn’t removed from the stream. The ungetc function pushes the character specified by c (converted to an unsigned char) back onto the input stream pointed to … Read more
If $stdin is reassigned, STDIN is not affected. Likewise $stdin is not affected when STDIN is reassigned (which is perfectly possible (though pointless), but will produce a warning). However if neither variable has been reassigned, they both point to the same IO object, so calling reopen¹ on one will affect the other. All the built-in … Read more