03-05-2008
Minicom runscript: How to send escape character ( \ )
Please can any of you address my query which I dont find in the runscript MAN page
and other results on google.
I am using minicom scripts to configure my uboot environment.
I have to send a string which contains the escape character ( \ ) itself as follows
send "set bootcmd bootm cp.b $(INITRD_FLASH) 0x1200000 0x100000 \;bootm $(ZIMAGE_FLASH) 0x1200000"
when I execute the script, minicom shows error the following message when executing the above mentioned line
"script "flash_mpc8349.minicom": syntax error in line 30 (word contains ESC or quote)"
I tried prefixing it with ^ (^\) but didnt work. Would be great if you could let me know if there is a specific sequence to send the ( \ ) character.
Thanking you,
Regards,
Raman
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LEARN ABOUT DEBIAN
escape
escape(1) Mail Avenger 0.8.3 escape(1)
NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO
avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)