The short answer is, you cannot put quotes in quotes that way directly, the shell won't do that kind of doublethink. You asked for literal quotes, so it gave you literal quotes; making them go away takes an eval, which means big trouble. If someone manages to cram `rm -RF ~/ into your string, eval will execute that!
I'd do this instead:
This lets you do splitting on arguments instead of spaces, preserving your strings literally without having to deal with quotes inside quotes. This avoids the eval, and makes your code much safer.
I have a variable whose value is
I="user1:x:1100:1200:ID for user1:/home/user1:/bin/ssh-dummy-shell"
I want to replace the last part '/bin/ssh-dummy-shell' with '/bin/true'
I tried using sed but it garbled
sed 's/\/bin\/ssh-dummy-shell/\/bin\/true' $I
Thanks for the help (5 Replies)
There is shell script which contains some variables .
These variables are used , but they have not declared in the script.
I think its a environment variable, so I want to know where these variables are set and given values
In .profile or .login..or where to c
Please give the full path and... (1 Reply)
There is shell script which contains some variables .
These variables are used , but they have declared in the script.
I think its a environment variable, so I want to know where these variables are set and given values
In .profile or .login..or where to c
Please give the full path and file... (3 Replies)
when i run a select query in database, it will return the objid based on the condtion. If there is no objid tht meets the condition, I will not get any value returned and the variable will hold nothing... so now how to chk tht the variable is blank or not. I tried the below piece of code:
if ;... (6 Replies)
Hi All:
I want to write a shell script to store OS current date - 1 day value in a variable.
Current Date is: 22042010 and new value is 21042010
I have multiple files having date value in name in ddmmyyyy format for multiple day, so I want to find all the files based on the date... (3 Replies)
I have a zsh script written by someone else, I am trying to modify it to work on slightly different data -problem is I know nothing about shell scripting.
I am trying to muddle through this myself since I need to learn but can someone tell me how to debug a script? ie. I want to display the value... (6 Replies)
I have situation where I have rules in iptables with comments. Now... I can for example enter rule like "iptables -A FORWARD -s xxx -j ACCEPT" and delete it with "iptables -D FORWARD -s xxx -j ACCEPT".. but if that rule contain some random comment (-m comment) then ... ? I can find with scripting... (2 Replies)
I just setup a new jumpstart server, and I'm having problems with rules.ok errors.
I'm coming up blank after many Google searches, forum searches, etc.....
This is the error I receive:
Skipped interface e1000g1
Attempting to configure interface e1000g0...
Configured interface e1000g0... (0 Replies)
korn shell,
testing if a pattern exist in a string,
x is constant, y could be none,all or any combination of the elements of x,
x="aa bb cc dd ee ff gg hh ii jj kk ll"
y="ff kk"
for z in `echo ${x}`
do
if <any pattern in $y matches any pattern in $x> ]
then
do something
fi... (3 Replies)
Hi
i have a variable var=a_b_c
i want command to find no. of underscores in a variable
Thank you (7 Replies)
Discussion started by: pracheth
7 Replies
LEARN ABOUT PHP
escapeshellarg
ESCAPESHELLARG(3) 1 ESCAPESHELLARG(3)escapeshellarg - Escape a string to be used as a shell argumentSYNOPSIS
string escapeshellarg (string $arg)
DESCRIPTION escapeshellarg(3) adds single quotes around a string and quotes/escapes any existing single quotes allowing you to pass a string directly
to a shell function and having it be treated as a single safe argument. This function should be used to escape individual arguments to
shell functions coming from user input. The shell functions include exec(3), system(3) and the backtick operator.
On Windows, escapeshellarg(3) instead removes percent signs, replaces double quotes with spaces and adds double quotes around the string.
PARAMETERS
o $arg
- The argument that will be escaped.
RETURN VALUES
The escaped string.
EXAMPLES
Example #1
escapeshellarg(3) example
<?php
system('ls '.escapeshellarg($dir));
?>
SEE ALSO escapeshellcmd(3), exec(3), popen(3), system(3), backtick operator.
PHP Documentation Group ESCAPESHELLARG(3)