The script I am writing must be able to run several commands (tar, gzip etc) on filenames that are supplied by variables. I am unsure as to what syntax is required/ideal when referencing variables in filenames. The following is a sample command that I would like the script to execute:
tar cvf... (3 Replies)
Undefined first referenced
symbol in file
std::basic_ostream<char, std::char_traits<char> >::operator<<(int)/var/tmp//ccTR
std::cerr /var/tmp//ccTRcjui.o
std::cout /var/tmp//ccTRcjui.o... (1 Reply)
Hey everyone, I can't figure out this symbol referencing error after looking at it for the longest time, and I figured some fresh eyes might be able to point something out I am overlooking.
Undefined first referenced
symbol in... (1 Reply)
Hello, I am new to shell scripting so this might be a simple question...also, please excuse me if this is a topic discussed before.
I have declared a bunch of variables as such:
Host_1=32
Host_2=33
Host_3=34
temp=1
numUsers=4
Now, I am trying to go through a loop to access each of these... (4 Replies)
Hi,
I have tried all examples of back referencing from the web but all in vain.
It would be heavily helpful if someone explains me the use of back referencing and sub expression using an example of substitution.
Thanks (1 Reply)
I need to list out all the AutoSys jobs that are referencing a particular AutoSys global variable.
I know the autorep command will definitely need to be used here, and maybe grep as well, but I can't figure out exactly how it's to be done. For example, "autorep -q -J %jobnamewildcard% | grep... (1 Reply)
Is it possible to design a shell script to reference something that queries for input?
(This is not to make a script to ssh)
For instance if I have a command that when run, it does something like:
%<Some command>
User's password? Would it be possible to write a script to input something... (1 Reply)
Undefined first referenced
symbol in file
logf /var/tmp//ccwztFsO.o
ld: fatal: Symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status
float exponC(float mean)
{
index1++;... (1 Reply)
Hi
I have a file which has values in each line:
MP304,d40000
MP310,ff0000
etc
I have another file which as the first value in it and is unique in the file(not repeated). I need to replace a string with the second value above. The second file contents is as follows:(snippet)
<g
... (12 Replies)
How would I reference a source path (where I have a script pulling data from) that changes location? For example, a Mail folder is being used as a source to pull some data, but somebody could move the folder around in the GUI of Mail, changing it's location in the filesystem (that I am referencing... (11 Replies)
Discussion started by: sudo
11 Replies
LEARN ABOUT X11R4
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)