STDIN stdout

This is a discussion on STDIN stdout within the Linux Programming forums, part of the Platform Specific Boards category; maybe someone can help me, I am writting a command line interface for an embedded device... kind of like a ...

  1. #1
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    Unhappy STDIN stdout

    maybe someone can help me, I am writting a command line interface for an embedded device... kind of like a user shell, it just reads user input parses it, and spits back some output.

    here is my problem, this CLI, needs to run over a serial port, a TCP socket, and a standard linux terminal trasparently... so instead of using send and recv, I am using read and write, which work great for TCP, and serial port, but when it comes to doing something like this on linux

    read( 1, buff, sizeof(buff ));

    I always get core dump.

    does anyone know does linux store stdin, and stdout, as file descriptors ( not pointers )in global varibles???

    thanks
    ~good monkeys, Excelent typewritters!...

  2. #2
    Registered User alex's Avatar
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    I guess you could use fileno(stdin).

    alex

  3. #3
    Im back! shaik786's Avatar
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    >does anyone know does linux store stdin, and stdout, as file descriptors ( not pointers )in global varibles???
    File descriptor of 'stdin' is 0 (not 1) and of 'stdout' is 1 (and ofcourse, 2 is the 'stderr'). You are trying to read from the output stream, which is incorrect. Change it to:
    read(0, buff, sizeof(buff));

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