I'd like to correct: last one is not the same!
I've tryed it:
Code:
bash-845:/home/dca0701/develop/src> nn=aa
bash-846:/home/dca0701/develop/src> aa=final
bash-851:/home/dca0701/develop/src> eval dn=\$$nn
bash-852:/home/dca0701/develop/src> echo $dn
final
bash-853:/home/dca0701/develop/src> eval dn=$"$nn"; echo $dn
aa
I do not even understand why it is happened this way?!
First time by 'eval' the $nn should be substituted for 'aa' and '"' should be remuved (as I understand!). So result should be
Code:
dn=$aa
and that by next processing should be as expected! But it prints only aa ?!
-------------------------
Ok, I've get it! It should be little bit different:
Code:
eval dn="$"$nn; echo $dn
Now it is going to result the same!
So: the 'eval' do NOT evaluates value in double quotations or after backslash, but removes that quotations and backslashes!
I don't understand this, can anyone explain the evaluation logic used here, and I would really appreciate a general explanation for it.
----------------------
Here's the korn script:
--------------------
#! /usr/bin/ksh
if ]
then
echo true
else
echo false
fi
if (( 2 > 10 ))
then... (1 Reply)
Can someone help me out here. I can't get this piece of code to work. i.e. $ALL_EVENTS does not get interpreted in the if brackets. The first part is the code, the second part is the execution of the code. Note: $ALL_EVENTS does equal 2, but there is no value once passed to the if statement. ... (4 Replies)
i need to output an ls command to a file but also capture any errors from that command and output them to a log file and the screen.
if it's only possible to output them to a log file and not the screen then that's fine.
this is what i've tried so far, but it won't populate log.txt. i've... (16 Replies)
Hi all.
So I have a problem. I have been doing real good figuring this stuff out on my own but Im a newbie and stuck on something that is probably real basic.
I want to get the following output from the who command:
User TTY Date Time
gd22a12 pts/1 Feb 1 11:34
gd22a13 pts/3 Feb 1... (13 Replies)
I apologize for the title but I am not even sure myself what to call this. I am going to use an example of a pizza delivery. I need to make an interactive script that allows users to order a certain number of pizzas, and then choose what they want on each pizza. Here is my code so far....
... (1 Reply)
Hi,
I had another question. I was wondering if there was a way to tab a line a variable number of times in tcsh. To go into details, I want to tab a line by how deep a file is in its path.
So here is an example code:
set filea=/blah1/blah2/blah3
set fileb=/blah1/blah2/blah3/blah4
set... (4 Replies)
Hello all,
I would like to create a for loop or whatever is quick that will print the one’s place of a number for 1-N times
say for example a printed page formatting is 132 characters wide,
I would like a single line
123456789012345678901234567890... ...012
That is 132 characters long. I... (11 Replies)
Hi
Please can you help how do I count the number of specific characters or words that appear in a file? (8 Replies)
Discussion started by: fretagi
8 Replies
LEARN ABOUT SUSE
rbash
RBASH(1) General Commands Manual RBASH(1)NAME
rbash - restricted bash, see bash(1)RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a filename containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO bash(1)GNU Bash-4.0 2004 Apr 20 RBASH(1)