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[hylafax-devel] Re: /bin/stty: standard input: unable to perform all requested operations
Darren Nickerson <darren@dazza.org> writes:
...
| It's the 'stty 0' which fails now. Previously:
|
| [root@fax /root]# cat /etc/issue
|
| Red Hat Linux release 4.2 (Biltmore)
| Kernel 2.0.30 on an i586
|
| [root@fax /root]# stty --version
| stty (GNU sh-utils) 1.16
| [root@fax /root]# stty 0
| [root@fax /root]#
|
| whereas now we see:
|
| [root@ducent uucp]# cat /etc/issue
|
| Red Hat Linux release 6.1 (Cartman)
| Kernel 2.2.14pre11 on a 2-processor i686
|
| [root@ducent uucp]# stty --version
| stty (GNU sh-utils) 2.0
| Written by David MacKenzie.
|
| [root@ducent uucp]# stty 0
| stty: standard input: unable to perform all requested operations
| [root@ducent uucp]#
>From what I recall, the `failure' you're seeing is new only in
the sense that stty detects it -- before it didn't detect that it
had not performed all requested changes, now it does.
I believe it still performs the same syscalls. If in doubt,
run strace on both systems.
| The original author was apparently wanting a system-independent way of
| resetting the modem . . . hanging up the line with stty seemed to do the trick. Until now :-(
|
| The man page for the working version says of the numeric argument to stty:
|
| Special settings:
|
| N Set the input and output speeds to N. N can be one
| of: 0 50 75 110 134 134.5 150 200 300 600 1200 1800
| 2400 4800 9600 19200 38400 exta extb. exta is the
| same as 19200; extb is the same as 38400. 0 hangs <--------
| up the line if -clocal is set. <--------
|
| IRIX 6.4 says:
|
| Control Modes
| 0 hang up phone line immediately.
|
| Whereas the current
|
| Special settings:
| N set the input and output speeds to N bauds
|
| and no mention of the reset special case if N=0.
The original text of the man page is now in the texinfo documentation
(see `info stty').
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