In languages like C and C++, there is a global variable with the name stdout, which is a pointer to the standard output stream. Thus, stdout has become a commonly used abbreviation for “standard output stream” even outside the context of the C language. Now, what does C# do? Let’s have a look at the … Read more
A minimal and complete working example of how to use this answer (tested in Python 3.6.1) # run.py from paramiko import SSHClient ssh = SSHClient() ssh.load_system_host_keys() ssh.connect(‘…’) print(‘started…’) stdin, stdout, stderr = ssh.exec_command(‘python -m example’, get_pty=True) for line in iter(stdout.readline, “”): print(line, end=””) print(‘finished.’) and # example.py, at the server import time for x in … Read more
Popen.communicate() is a helper method that does a one-time write of data to stdin and creates threads to pull data from stdout and stderr. It closes stdin when its done writing data and reads stdout and stderr until those pipes close. You can’t do a second communicate because the child has already exited by the … Read more
Yes, you can redirect it to an std::stringstream: std::stringstream buffer; std::streambuf * old = std::cout.rdbuf(buffer.rdbuf()); std::cout << “Bla” << std::endl; std::string text = buffer.str(); // text will now contain “Bla\n” You can use a simple guard class to make sure the buffer is always reset: struct cout_redirect { cout_redirect( std::streambuf * new_buffer ) : old( … Read more
stdout is a FILE* pointer giving the standard output stream. So obviously fprintf(stdout, “x=%d\n”, x); has the same behavior as printf(“x=%d\n”, x);; you use stdout for <stdio.h> functions such as fprintf(), fputs() etc.. STDOUT_FILENO is an integer file descriptor (actually, the integer 1). You might use it for write syscall. The relation between the two … Read more
Try stdbuf, included in GNU coreutils and thus virtually any Linux distro. This sets the buffer length for input, output and error to zero: stdbuf -i0 -o0 -e0 command
You can use setmode(fileno(stdout), O_BINARY) Wrap it in an ifdef if you want to keep it compatible with Linux. See also: https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/setmode?view=vs-2017
I believe you are using the echo Text >> Example.txt function? If so the answer would be simply adding a “.” (Dot) directly after the echo with nothing else there. Example: echo Blah echo Blah 2 echo. #New line is added echo Next Blah
In this specific case for capturing ffmpeg’s status output (which goes to STDERR), this SO question solved it for me: FFMPEG and Pythons subprocess The trick is to add universal_newlines=True to the subprocess.Popen() call, because ffmpeg’s output is in fact unbuffered but comes with newline-characters. cmd = “ffmpeg -i in.mp4 -y out.avi” process = subprocess.Popen(cmd, … Read more
Yes – you can use a ByteArrayOutputStream: ByteArrayOutputStream baos = new ByteArrayOutputStream(); System.setOut(new PrintStream(baos)); Then you can get the string with baos.toString(). To specify encoding (and not rely on the one defined by the platform), use the PrintStream(stream, autoFlush, encoding) constructor, and baos.toString(encoding) If you want to revert back to the original stream, use: System.setOut(new … Read more