PIPE(S)                  XENIX System V                   PIPE(S)



     Name
          pipe - Creates an interprocess pipe.

     Syntax
          int pipe (fildes)
          int fildes[2];

     Description
          pipe creates an I/O mechanism called a pipe and returns two
          file descriptors in the array fildes.  fildes[0] is opened
          for reading and fildes[1] is opened for writing and the
          O_NDELAY flag is clear. The descriptors remain open across
          fork(S) system calls, making communication between parent
          and child possible.

          Writes up to 10240 bytes of data (10 times BSIZE) are
          buffered by the pipe before the writing process is blocked.
          A read on file descriptor fildes[0] accesses the data
          written to fildes[1] on a first-in-first-out basis.

          No process may have more than 60 file descriptors open
          simultaneously.

          pipe will fail if 19 or more file descriptors are currently
          open.  [EMFILE] It will also fail if the system file table
          is full.  [ENFILE]

     Return Value
          Upon successful completion, a value of 0 is returned.
          Otherwise, a value of -1 is returned and errno is set to
          indicate the error.

     See Also
          sh(C), read(S), write(S), fork(S), popen(S)





















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