isfdtype.c

unix网络编程的源码

#include	"unpipc.h"

#ifndef	S_IFSOCK
#error S_IFSOCK not defined
#endif

int
isfdtype(int fd, int fdtype)
{
	struct stat	buf;

	if (fstat(fd, &buf) < 0)
		return(-1);

	if ((buf.st_mode & S_IFMT) == fdtype)
		return(1);
	else
		return(0);
}