Technical Reference: Kernel and Subsystems, Volume 1

getufdflags and setufdflags Kernel Services

Queries and sets file-descriptor flags.

#include <sys/user.h>
int getufdflags(fd, flagsp)
int fd;
int *flagsp;
#include <sys/user.h>
int setufdflags(fd, flags)
int fd;
int flags;

fd	Identifies the file descriptor.
flags	Sets attribute flags for the specified file descriptor. Refer to the sys/user.h file for the list of valid flags.
flagsp	Points to an integer field where the flags associated with the file descriptor are stored on successful return.

The setufdflags and getufdflags kernel services set and query the file descriptor flags. The file descriptor flags are listed in fontl.h.

These kernel services can be called from the process environment only.

0	Indicates successful completion.
EBADF	Indicates that the fd parameter is not a file descriptor for an open file.

The ufdhold and ufdrele kernel services.