Your script works just about fine. You might need an if-else construct:
But what does this mean: "hasn't been assigned to any service"? That's meaningless. Either a port is being listened to or it's not.
Hi,
In Linux how to find out what will be the stack size allocated for a process?
Actually i have to fork n number of processess, and will call exec. I will be execing an executable which is already multithreaded and each thread size is defined. My doubt is how to know if the size of the... (2 Replies)
HI ,
I am having a file as
-----------------a.out-------------------
Hi I am
unix developer
using hp unix
this is a
test
---------------------------------------
i need to read each line by a unix script of the file and to print in console with the space in the line as ... (9 Replies)
I want to find out how many disk blocks are used by only data (and not metadata) by a file.
But as far as I can tell, if the file has holes, then there is no way to know this.
You can find out the logical size of the file (physical size + hole blocks).
You can get the physical size of the... (3 Replies)
Hi,
I want to know the command which can be used for finding the % of disk space occupied by files & sub-folders inside a given mount in Sun Solaris
For eg: I have /tmp/ folder when I sat df -k it will give the percentage of space used by /tmp/.
Say if I want to see how much % the files &... (2 Replies)
Guys,
Can some one help me?
I need to find the total percent of space occupied by core files on my unix system.
I know df -k will give me the percent space utilization for a directory but how do we replicate the space for a file? (3 Replies)
Hello,
I am using Red Hat linux system. I see my /work directory has used space 300GB. But there are so many sub directory under /work. I want to list each direcotry and under all subdirectory. But i want to know how much space occupied by each directory. What kind of command i can use to... (3 Replies)
I have long list of file wanna processed by a program:
data_1.txt
data_2.txt
data_3.txt
data_4.txt
data_5.txt
data_6.txt
data_7.txt
data_8.txt
.
.
data_1_2.txt
data_2_2.txt
data_3_2.txt
data_4_2.txt
data_5_2.txt
data_6_2.txt
. (12 Replies)
Hi All
How to answer the below interview question..
With a path and filename of "/mydir1/mydir2/mydir3/myfilenane.dat" write a UNIX script to display the filename (2 Replies)
Discussion started by: shumail
2 Replies
LEARN ABOUT BSD
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)