isfdtype(3) [osf1 man page]

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)

sockatmark(3)						     Library Functions Manual						     sockatmark(3)

NAME

       sockatmark - Tests whether a socket is at the out-of-band mark

LIBRARY

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

SYNOPSIS

       #include <sys/socket.h>

       int sockatmark (int socket);

STANDARDS

       The sockatmark function also 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 associated with a socket.

DESCRIPTION

       The sockatmark() function enables applications to determine which received data precede the out-of-band data and which data follow the out-
       of-band data.  The function uses the file descriptor for the socket to locate the data.	Applications typically use this  function  between
       receive operations.

       The sockatmark() function does not remove the mark from the stream.

RETURN VALUES

       Upon  successful completion, the sockatmark() function returns 1 if the protocol has marked the data stream and all data preceding the mark
       have been read, or 0 (zero) if there is no mark or if data precede the mark in the receive queue.

       If the sockatmark() function fails, a value of -1 is returned and errno is set to indicate the error.

ERRORS

       If the sockatmark() function fails, errno may be set to one of the following values: The socket parameter is not a valid  file  descriptor.
       The socket parameter does not specify a descriptor for a socket.

RELATED INFORMATION

       Functions: recv(2), recvmsg(2).

       Standards: standards(5).  delim off

																     sockatmark(3)