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NAME

     stdin, stdout, stderr --  I/O

SYNOPSIS

     #include <stdio.h>
     extern FILE *stdin;
     extern FILE *stdout;
     extern FILE *stderr;

DESCRIPTION

      Unix  ( tty(4))  ( sh(1)  (``Redirection'') )

      ``standard input'';  ``standard output'';  ``standard error'' stdin,
     stdout, stderr.

      stdio(3)  FILE fprintf(3) fread(3)

      FILE  Unix  Unix read(2) lseek(2) stdin, stdout, stderr  01  2
     STDIN_FILENOSTDOUT_FILENO  STDERR_FILENO  <unistd.h>

      FILE (POSIX.1  8.2.3 )  stdio  exec

      stdin, stdout, stderr freopen(3) stdin, stdout, stderr exit(3)

SEE ALSO

     sh(1), csh(1), open(2), fopen(3), stdio(3)

CONSIDERATIONS

      stderr stdout fflush(3) exit(3)  () setbuf(3) setvbuf(3) stdin  stdio ()
     tcsetattr(3) stty(1), termios(3)

CONFORMING TO

      stdin, stdout, stderr ANSI X3.159-1989 (``ANSI C89'')