Does lshwres interact directly with the terminal? Are there any options to disable this? I could sort of replicate the situation with stty:
Code:
ssh -n -t user@remotehost "hostname; stty"
Pseudo-terminal will not be allocated because stdin is not a terminal.
remotehostname
echo $?
0
No error!
Well, yes.
Code:
stty: standard input: Inappropriate ioctl for device
Pseudo-terminal will not be allocated because stdin is not a terminal.
Both outputs, aren't exactly errors, why the ssh command comes back with exit code 0.
I want to understand why this message comes and how I'm able to avoid it.
Like I said: The code is working perfectly, as it is supposed to be, I just receive this message and I try to build the script to avoid it properly and not just suppress it.
Quote:
Originally Posted by RudiC
Looks like -n and -t are mutually exclusive (which seems logical if reading the man page). Try dropping the -n:
When I drop the -n parameter, the while loop will break, which is just how it is supposed to work.
The stty: standard input: Inappropriate ioctl for device message comes, regardless of which command I execute on the remote host, even a date, or test causes it, which is why I think that the ssh is responsible for it.
Code:
# ./script.sh
.
.
.
++ for HMC in '${strHMCLIST}'
++ strNILIST=
++ ssh -t hscroot@X.X.X.X 'lssyscfg -r sys -F '\''name type_model serial_num lpar_proc_compat_modes'\'''
++ read N T S P
Connection to X.X.X.X closed.
++ strNAME=XXX
++ strIDENT='XXX*XXX'
++ strNILIST='XXX XXX*XXX\n'
++ strCPUARCH=XXX
++ read strDATE
+++ ssh -t hscroot@X.X.X.X date
stty: standard input: Inappropriate ioctl for device
Pseudo-terminal will not be allocated because stdin is not a terminal.
++ read N T S P
++ echo
.
.
.
When I drop the -n parameter, the while loop will break, which is just how it is supposed to work.
.
.
.
Now, it doesn't break, that is. The ssh just eats up all stdin which is redirected from .outlist.tmp, and the while read cleanly finishes on end-of-file. Did you consider using another file descriptor for redirecting its input?
you said you're under Cygwin's bash.
Looks like Cygwin (at least mine) is using Windows' native ssh client:
...
Is that the case with you as well?
Any chance you can try the same script/steps on the native UNIX (not Cygwin on MS)?
I use MobaXterm, which brings its own SSH client.
Unfortunately, for "security reasons" this Windows Terminalserver is the only connection I have to my UNIX machines.
Quote:
Originally Posted by RudiC
Now, it doesn't break, that is. The ssh just eats up all stdin which is redirected from .outlist.tmp, and the while read cleanly finishes on end-of-file. Did you consider using another file descriptor for redirecting its input?
Quote:
Originally Posted by MadeInGermany
You can connect the remote stdin to the local stdin if you use another descriptor for reading the file.
Well, yes, this works and is an idea I didn't get behind earlier.
Thank you very much!
I have several problems with my problems: I hope you can help me.
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