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I am telnet-ing into a Solaris machine and I'm getting the above error with my scripts. I realize this is a common problem, and the solution is to check for the line 'stty erase ^H' within my profile, but I can't find it.

.profile doesn't have any references to stty, and I don't have a .cshrc anywhere. I performed a grep in my home directory, but I came up with nothing.

Is there another source of this problem? All the solutions online refer to either .profile or .cshrc. Thanks.

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4 Answers 4

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I had this, it was an stty in .kshrc. Remember that .kshrc is sourced on all ksh scripts, interactive and non interactive. If you run a script, stty will still fire, try to work on stdin, which is a file (not a tty now) and fail with an error.

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I realized that that was the file I needed to look for. Unfortunately, I don't have any traces of it under any home directories or /etc/. I even created my own with "if ( $?prompt && { tty -s } ) stty erase ^?" and various other lines I gathered online with no luck. Any other suggestions? Thanks. –  noisesolo Mar 15 '11 at 19:59
    
I'd do: (1) log in. strace -p <pid of current shell> -o /some/file -f (2) run your script (3) kill the strace (4) use your grep/sed skills to see all the file open()s in the strace log (5) grep through those for stty. I do this regularly when i don't know what's happening. –  Rich Homolka Mar 15 '11 at 20:20

To trace your profile, try invoking your login shell with a name beginning with - and with the option -x so that it prints . To find out what your login shell is, run getent passwd $USER; your login shell is the last field on the line (usually /bin/something). To invoke the shell with a name beginning with -, make a symbolic link whose name begins with - and run that. For example, if your login shell is ksh:

ln -s /bin/ksh ./-ksh
./-ksh -x
rm ./-ksh

I'm not sure if this will work with csh. If you don't find anything interesting, look both in /etc and your dot files:

grep stty /etc/* ~/.* 2>/dev/null
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From csh man page:

A login shell begins by executing commands from the system files /etc/csh.cshrc and /etc/csh.login. It then executes commands from files in the user's home directory: first ~/.tcshrc (+) or, if ~/.tcshrc is not found, ~/.cshrc, then ~/.history (or the value of the histfile shell variable), then ~/.login, and finally ~/.cshdirs (or the value of the dirsfile shell variable) (+). The shell may read /etc/csh.login before instead of after /etc/csh.cshrc, and ~/.login before instead of after ~/.tcshrc or ~/.cshrc and ~/.history, if so compiled; see the version shell variable. (+)

So there are a couple of files where you could find this line

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I don't have any of those files, and I checked all the files in all the home directories (there are only 4 users on this machine). Also, I was dumb and didn't realize that the specific solutions probably only pertains to csh scripts, but the scripts in question are ksh. Furthermore, I tried adding my own .kshrc file with "if ( $?prompt && { tty -s } ) stty erase ^?" and various other lines I gathered online with no luck. –  noisesolo Mar 15 '11 at 17:27

You can also use tty to test for tty: tty -s && stty erase ^H.

tty -s's return code specifies if the current connection is tty or not.

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