Path: utzoo!attcan!uunet!stealth.acf.nyu.edu!brnstnd
From: brnstnd@stealth.acf.nyu.edu
Newsgroups: comp.unix.wizards
Subject: Re: Getting tty name without using ttyname(3)
Message-ID: <15137:00:09:24@stealth.acf.nyu.edu>
Date: 16 Feb 90 00:09:25 GMT
References: <673@compel.UUCP>
Reply-To: brnstnd@stealth.acf.nyu.edu (Dan Bernstein)
Organization: IR
Lines: 12

In article <673@compel.UUCP> her@compel.UUCP (Helge Egelund Rasmussen) writes:
> I need to write a replacement for the SYSV release 3 ttyname(3) function.

ttyname() takes a file descriptor argument and (as you observed) searches
through /dev for a tty (or just any file? I haven't checked) referencing
the same inode. If you have a lot of non-tty entries in /dev, you could
write a much faster version that only looks at files beginning with tty.
Of course, to avoid confusion you shouldn't call this ttyname().

Use directory(3), stat(2). (The whole thing is a kludge.)

---Dan