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You are here: manpages





ISFDTYPE

Section: Linux Programmer's Manual (3)
Updated: 2014-03-13
Index Return to Main Contents
 

NAME

isfdtype - test file type of a file descriptor  

SYNOPSIS

#include <sys/stat.h>
#include <sys/socket.h>

int isfdtype(int fd, int fdtype);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

isfdtype():

Since glibc 2.20:
_DEFAULT_SOURCE
Before glibc 2.20:
_BSD_SOURCE || _SVID_SOURCE
 

DESCRIPTION

The isfdtype() function tests whether the file descriptor fd refers to a file of type fdtype. The fdtype argument specifies one of the S_IF* constants defined in <sys/stat.h> and documented in stat(2) (e.g., S_IFREG).  

RETURN VALUE

The isfdtype() function returns 1 if the file descriptor fd is of type fdtype and 0 if it is not. On error, -1 is returned and errno is set to indicate the cause.  

ERRORS

The isfdtype() function can fail with any of the same errors as fstat(3).  

CONFORMING TO

The isfdtype() function is not specified in any standard, but did appear in the draft POSIX.1g standard. It is present on OpenBSD and Tru64 UNIX (where the required header file in both cases is just <sys/stat.h>, as shown in the POSIX.1g draft), and possibly other systems.  

NOTES

Portable applications should use fstat(3) instead.  

SEE ALSO

fstat(3)  

COLOPHON

This page is part of release 3.81 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
SEE ALSO
COLOPHON


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