Gather user input from a different terminal

See more:

C

Linux

Common Assumptions

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We have three terminals open lets say /dev/pts/x named as terminal-x, where x being 0, 1 and 2.

Shell-Based Scenario

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Issue the following command in terminal-2:

cp /dev/pts/1 /dev/pts/0

Now try typing some characters inside the terminal-1 and you observed that some of them (one-yes, one-not pattern) appear in the terminal-0. This means that when you type abcdef the characters ace are displayed in terminal-1 and the characters bdf are displayed in terminal-0.

Programmatic Scenario

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I have a text-based console program which I run from terminal-0 and use that terminal for showing status information to user.
Now I want to gather user input (text-based) from terminal-1 by performing by redirecting standard input and output to that console and then performing scanf and printf:

  1  freopen("/dev/pts/1","r", stdin);
  2  freopen("/dev/pts/1","w", stdout);
  3  //And then performing
  4  printf ("enter x");
  5  scanf ("%d", &x);

Summary of Issues

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1) When I enter my input string in terminal-1 and press <enter>, it is interpreted as a command and is tried to be executed by the operating system and thus receiving a "command not found".

2) Some of the characters I type in terminal-1 are displayed and some are not!.[however the value is scanf-ed correctly in the program!]


Any kind of advice / suggestion is appreciated in advanced.