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.TH UDBUF 2
.CT 2 file_io file_inq_creat
.SH NAME
udbuf \(mi fetch file name component
.SH SYNOPSIS
.nf
.B #include <sys/types.h>
.B #include <sys/dir.h>
.PP
.B int udbuf(name)
.B char name[DIRSIZ];
.fi
.SH DESCRIPTION
.I Udbuf
copies the current contents of the user's
.B u.u_dbuf
array into the array
.I name.
This is the most recent filename component decoded by the
kernel subroutine
.BR namei .
It is usually the last component of the filename which was
most
recently presented by the user process to a system call.
If that file name, however,
refered to an entry in a `blind directory' (see
.IR bl (4))
the kernel may have randomized the name before using it.
.SH "SEE ALSO"
.IR bl (4),
.IR mkunique (3)
.SH DIAGNOSTICS
.L
EFAULT
.SH BUGS
Ill named.
On a VAX the
.I u.
area is in user space, and
the same effect may be had by:
.EX
#include <sys/types.h>
#include <sys/dir.h>
#include <sys/user.h>
struct user *ua = (struct user *)(0x80000000 - UPAGES*NBPG);
strncpy(name, ua->u_dbuf, DIRSIZ);
.EE
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