Xref: utzoo unix-pc.general:2215 comp.sys.att:5509
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!rutgers!att!icus!lenny
From: lenny@icus.islp.ny.us (Lenny Tropiano)
Newsgroups: unix-pc.general,comp.sys.att
Subject: Re: termio(7) and read(2) problem!
Summary: Correction!
Message-ID: <601@icus.islp.ny.us>
Date: 10 Feb 89 15:13:40 GMT
References: <137@zebra.UUCP> <7411@chinet.chi.il.us> <10652@stb.UUCP> <599@icus.islp.ny.us>
Reply-To: lenny@icus.islp.ny.us (Lenny Tropiano)
Distribution: na
Organization: ICUS Software Systems, Islip, New York
Lines: 32

In article <599@icus.islp.ny.us> lenny@icus.islp.ny.us (Lenny Tropiano) writes:
|>
|>Use the fcntl(2) system call.
|>
|>#include <fcntl.h>
|>
|>int	oflags;
|>
|>	/* assume a file descriptor (fd) is already open and in use */
|>	...
|>	fcntl(fd, F_GETFL, &oflags);	/* get the current open flags */
|>				/* set the flags to have O_NDELAY too */
|>	fcntl(fd, F_SETFL, oflags | O_NDELAY);	
|>
|>I assume that would do it for ya...
|>
I guess next time I should look in the manual first.  It's been a while 
since I did fcntl, and the "DIAGNOSTICS" section of the manual page fcntl(2)
says that the return value of F_GETFL is the file flags.  Therefore there is
*no* argument ...  Thanks Mike, you enlightened me again :-)  

	oflags = fcntl(fd, F_GETFL);
	if (oflags != -1)
		fcntl(fd, F_SETFL, oflags | O_NDELAY);	

-Lenny

-- 
Lenny Tropiano             ICUS Software Systems         [w] +1 (516) 582-5525
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