NAME    [Toc]    [Back]

     fd, stdin, stdout, stderr - file descriptor files

DESCRIPTION    [Toc]    [Back]

     The files /dev/fd/0 through /dev/fd/# refer to file descriptors which can
     be accessed through the file system.  If the file descriptor
is open and
     the mode the file is being opened with is a  subset  of  the
mode of the existing
 descriptor, the call:

           fd = open("/dev/fd/0", mode);

     and the call:

           fd = fcntl(0, F_DUPFD, 0);

     are equivalent.

     Opening  the  files /dev/stdin, /dev/stdout, and /dev/stderr
is equivalent
     to the following calls:

           fd = fcntl(STDIN_FILENO,  F_DUPFD, 0);
           fd = fcntl(STDOUT_FILENO, F_DUPFD, 0);
           fd = fcntl(STDERR_FILENO, F_DUPFD, 0);

     Flags to the open(2) call other than O_RDONLY, O_WRONLY, and
O_RDWR are
     ignored.

FILES    [Toc]    [Back]

     /dev/fd/#
     /dev/stdin
     /dev/stdout
     /dev/stderr

SEE ALSO    [Toc]    [Back]

     tty(4)

OpenBSD      3.6                           June      9,      1993