Add a simple /bin/more.

Userland/more.cpp

@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+static int key_fd;
+
+void wait_for_key()
+{
+    printf("\033[7m--[ more ]--\033[0m");
+    fflush(stdout);
+    char dummy;
+    read(key_fd, &dummy, 1);
+    printf("\n");
+}
+
+int main(int argc, char** argv)
+{
+    (void) argc;
+    (void) argv;
+
+    key_fd = open(ttyname(1), O_RDONLY);
+    if (key_fd < 0) {
+        perror("open");
+        return 1;
+    }
+
+    struct winsize ws;
+    ioctl(1, TIOCGWINSZ, &ws);
+
+    unsigned lines_printed = 0;
+    while (!feof(stdin)) {
+        char buffer[BUFSIZ];
+        auto* str = fgets(buffer, sizeof(buffer), stdin);
+        if (!str)
+            break;
+        printf(str);
+        ++lines_printed;
+        if ((lines_printed % (ws.ws_row - 1)) == 0) { 
+            wait_for_key();
+        }
+
+    }
+
+    close(key_fd);
+    return 0;
+}