NAME    [Toc]    [Back]

       isfdtype - Test a file descriptor for a specific file type

SYNOPSIS    [Toc]    [Back]

       #include <sys/stat.h>

       int isfdtype(
               int filedes,
               int fd_type );

LIBRARY    [Toc]    [Back]

       Standard C Library (libc)

STANDARDS    [Toc]    [Back]

       The isfdtype function supports POSIX.1g Draft 6.6.

       Refer to the standards(5) reference page for more information
 about industry standards and associated tags.

PARAMETERS    [Toc]    [Back]

       Specifies the file descriptor to be tested.  Specifies the
       file type to test for. Valid file types are defined in the
       <sys/mode.h> include file.

DESCRIPTION    [Toc]    [Back]

       The  isfdtype()  function  tests whether a file descriptor
       has a specific file type.

RETURN VALUES    [Toc]    [Back]

       Upon  successful  completion,  the   isfdtype()   function
       returns  a  1 if the file descriptor has the specific file
       type or a 0 (zero) if it does not. If the isfdtype() function
  fails, a value of -1 is returned and errno is set to
       indicate the error.

ERRORS    [Toc]    [Back]

       If the isfdtype() function fails, errno may be set to  the
       following value: The filedes parameter is not a valid file
       descriptor.

SEE ALSO    [Toc]    [Back]

       Functions: socket(2), stat(2), isatty(3).

       Standards: standards(5).



                                                      isfdtype(3)