osf1 man page for isfdtype

isfdtype(3)						     Library Functions Manual						       isfdtype(3)

NAME
       isfdtype - Tests a file descriptor for a specific file type

LIBRARY
       Standard C Library: (libc.so, libc.a)

SYNOPSIS
       #include <sys/stat.h>

       int isfdtype (	   int filedes,      int fd_type);

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

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

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

       Standards: standards(5).  delim off

																       isfdtype(3)