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Top Forums Shell Programming and Scripting stty: tcgetattr: A specified file does not support the ioctl system call Post 302481083 by purdym on Thursday 16th of December 2010 03:34:19 PM
Old 12-16-2010
I had this issue too. I'm guessing you run stty in the background. Try:

Code:
stty ... 2>/dev/null

 

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STTY(3) 						   BSD Library Functions Manual 						   STTY(3)

NAME
stty, gtty -- set and get terminal state (defunct) LIBRARY
Compatibility Library (libcompat, -lcompat) SYNOPSIS
#include <sgtty.h> stty(int fd, struct sgttyb *buf); gtty(int fd, struct sgttyb *buf); DESCRIPTION
These interfaces are obsoleted by ioctl(2). They are available from the compatibility library, libcompat. The stty() function sets the state of the terminal associated with fd. The gtty() function retrieves the state of the terminal associated with fd. To set the state of a terminal the call must have write permission. The stty() call is actually 'ioctl(fd, TIOCSETP, buf)', while the gtty() call is 'ioctl(fd, TIOCGETP, buf)'. See ioctl(2) and tty(4) for an explanation. DIAGNOSTICS
If the call is successful 0 is returned, otherwise -1 is returned and the global variable errno contains the reason for the failure. SEE ALSO
ioctl(2), tty(4) HISTORY
The stty() and gtty() functions appeared in 4.2BSD. BSD
June 4, 1993 BSD
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