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Top Forums Shell Programming and Scripting stty error when script is called out of a cronjob Post 302401246 by fabiogilr on Friday 5th of March 2010 09:17:21 AM
Old 03-05-2010
stty error when script is called out of a cronjob

Hello,



I'm trying to implement a script to call a third-party tool every so often and write the results to a file. If I run it interactively it works fine, but when it comes to run it out of a cronjob, I keep getting this error:

stty: tcgetattr: a specified file does not support the ioctl system call


I need to call stty cols 132 so that the third-party tool works at all, otherwise I'd get: "display area must be at least 10 rows and 80 columns press <ctrl-d> to exit" written to my log file.

I have googled the error and people advise that cron does not have a terminal

Any suggestion on how to get the information out?

Here's the code

Code:
echo $dateout': Running spsmon now...' > $logfile
stty cols 132
spsmon -state Working > $tmpfile &
echo "PID of job put in backround = $!"
sleep 5
kill -9 $!
cat $tmpfile | awk 'BEGIN{RS=";";ORS="\n"} {print}' | awk '/Working/' | cut -c3-130 >> $logfile

Thanks Much
 

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STTY(1) 						      General Commands Manual							   STTY(1)

NAME
stty - set terminal options SYNOPSIS
stty [ option ... ] DESCRIPTION
Stty sets certain I/O options on the current output terminal. With no argument, it reports the current settings of the options. The option strings are selected from the following set: even allow even parity -even disallow even parity odd allow odd parity -odd disallow odd parity raw raw mode input (no erase, kill, interrupt, quit, EOT; parity bit passed back) -raw negate raw mode cooked same as `-raw' cbreak make each character available to read(2) as received; no erase and kill -cbreak make characters available to read only when newline is received -nl allow carriage return for new-line, and output CR-LF for carriage return or new-line nl accept only new-line to end lines echo echo back every character typed -echo do not echo characters lcase map upper case to lower case -lcase do not map case -tabs replace tabs by spaces when printing tabs preserve tabs ek reset erase and kill characters back to normal # and @ erase c set erase character to c. C can be of the form `^X' which is interpreted as a `control X'. kill c set kill character to c. `^X' works here also. cr0 cr1 cr2 cr3 select style of delay for carriage return (see ioctl(2)) nl0 nl1 nl2 nl3 select style of delay for linefeed tab0 tab1 tab2 tab3 select style of delay for tab ff0 ff1 select style of delay for form feed bs0 bs1 select style of delay for backspace tty33 set all modes suitable for the Teletype Corporation Model 33 terminal. tty37 set all modes suitable for the Teletype Corporation Model 37 terminal. vt05 set all modes suitable for Digital Equipment Corp. VT05 terminal tn300 set all modes suitable for a General Electric TermiNet 300 ti700 set all modes suitable for Texas Instruments 700 series terminal tek set all modes suitable for Tektronix 4014 terminal hup hang up dataphone on last close. -hup do not hang up dataphone on last close. 0 hang up phone line immediately 50 75 110 134 150 200 300 600 1200 1800 2400 4800 9600 exta extb Set terminal baud rate to the number given, if possible. (These are the speeds supported by the DH-11 interface). SEE ALSO
ioctl(2), tabs(1) STTY(1)
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