10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Hi All,
I am writing an if statement to check multiple conditions, but when I try to execute the script it is breaking at the point of if statement by showing the issue below.
Code I am using is given below.
if -a ]
then
....
else
...
fi
I am not understanding... (3 Replies)
Discussion started by: ginrkf
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2. Shell Programming and Scripting
Hi,
Here is a big head scratcher for me....
I'm creating a loop with while reading lines from a file called example.txt:
#!/bin/sh
while read line
do
some command > another file ----- output to another file
done < example.txt
I would like that another file to be unique for every... (5 Replies)
Discussion started by: svetoslav_sj
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3. Shell Programming and Scripting
Writing my script and I'm banging my head on the desk right now ...
My biggest problem is the 3rd IF statement where I check if the username exists. Doing the grep command on it's own in the shell gives me a 1 or 0 value. Running the script, it always returns a false value (runs the ELSE... (4 Replies)
Discussion started by: ADay2Long
4 Replies
4. UNIX for Dummies Questions & Answers
Could someone help me out with this if statement? It's supposed to get a person's website, but it isn't working when I run it.
website=""
echo "Would you like to enter a website? Enter Yes/No"
read choice
if
then
while
do
echo "Please enter a website:";
read... (4 Replies)
Discussion started by: Sotau
4 Replies
5. Shell Programming and Scripting
Hi I have a bash script like this
if
then
echo "A"
else
echo "B"
fi
$1 is something like 02350 (there is always a trailing '0')
and I would like to have an if based on the value of the digits after the 0.
Can anybody help?
Thanks,
Sarah (3 Replies)
Discussion started by: f_o_555
3 Replies
6. UNIX for Dummies Questions & Answers
See https://www.unix.com/shell-programming-scripting/96846-if-statement-problem.html (0 Replies)
Discussion started by: f_o_555
0 Replies
7. Shell Programming and Scripting
The problem I am having here is that only the 1st option is executed, no matter if I pick yes or no. What am I doing wrong? How can I get this working right without resorting to a case statement?
echo "This is the max size your lvol can be:"
echo $MAXSIZE
echo
echo Do you want to max out... (2 Replies)
Discussion started by: LinuxRacr
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8. UNIX for Dummies Questions & Answers
hi all. i just have a very small problem. i have a menu of 7 choices. i want an if statement so that if the user chooses anything except inside the 1 to 7 range, i can handle the error for it.
i tried this:
if ]
then
.......
fi
(but it dont work)
...any suggestions?
... (4 Replies)
Discussion started by: djt0506
4 Replies
9. Shell Programming and Scripting
I need an IF statement that will compare the contents of the variable CX with the actual string "CP". ie. If the contents of $CX are NOT equal to the actual string "CP" then blah blah blah.
I have tried a number of things including the following.......
if ]; then
if ]; then
if ];... (2 Replies)
Discussion started by: hcclnoodles
2 Replies
10. UNIX for Dummies Questions & Answers
I keep getting an error at line 21, it doesn't like my if statement. Previously I have tried using (( )), but still get errors. The current error is that server_busy is not found. This is the script:
#! /bin/ksh
server_busy="na"
for file in $1 $2 $3 $4 $5 $6
do
echo " ${file}\t\c"
... (1 Reply)
Discussion started by: coughlin74
1 Replies
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)