You are using eval on the contents of an input which may not only creates a potential security risk, it also does not really make sense here since it interprets its arguments as shell commands and in this case the arguments are the result of [ICODE]echo $line[/ICODE], which read from [ICODE]dae2.txt[/ICODE].
And the content of [ICODE]dae2.txt[/ICODE] clearly does not contain shell commands...
To just get the content of a file into a variable, you could consider this (since you are using bash):
a more general alternative would be:
Last edited by Scrutinizer; 11-05-2016 at 05:28 AM..
Reason: Crossed out wrong remarks, because I did not have my brain switched on
This User Gave Thanks to Scrutinizer For This Post:
Hello!
I'm having problems trying to extract the contents of a variable and placing it into a text file. Grateful for any help.
Been trying something along the lines of:
$variable > file.txt
or
`cat < $variable` > file.txt
As you can see I'm a newbie to this :D (2 Replies)
Hi all,
I have a problem here. I have a file and let we take the content of the file is just '32' (only a numeric value in that file). Now I need to assign this numeric value ( value in that file) to a variable. Is that possible? If so, can you plz advice me on this?
Thanks in... (4 Replies)
I may not being doing this description justice, but I'll give it a try.
I created a mailx script; there will be several messages using the same script where the only difference is the content. So I figured I'd make the content of the message a variable retrieved from a separate file. I have five... (5 Replies)
For example, I have a simple text file
note:
this a note
a simple note
a very very simple notewhen I use this command,
temp=$(cat "note.txt")then I echo temp, the result is in one line.
echo $temp
note: this a note a simple note a very very simple noteMy variable doesn't have newline.
How... (7 Replies)
Hi,
I am working on one script..I am having files in the below format
file 1 (each line is separated with : delimeter)
SPLASH:SPLASH:SVN
CIB/MCH:MCH:SVN
Now I want from file 1 that most left part of the first line will store in... (6 Replies)
Hi,
Need to replace an XML tag name contents, please provide any suggestions.
Scenario is :
<abc_def>Value_some_content</abc_def>
Expected output :
<abc:def>Value_some_content</abc:def>
We have many tag with different names & contents in a file or a string.
Please help on the... (3 Replies)
Hi,
I have a file where I want to replace the 15th field separated by comma, only on specific lines matching lots of different conditions.
I have managed to read the file line by line, within the loop my line is held in a variable called $line
I assume this will be using sed (maybe... (5 Replies)
I have a file File1 containing lines like below
apple ${FRUIT}-Color
orange ${FRUIT}-Color
banana ${FRUIT}-Color
Now, in my shell I'm reading the file like below
while read FRUIT DESC; do echo $FRUIT $DESC; done < File1
which outputs -
apple ${FRUIT}-Color
orange ${FRUIT}-Color... (3 Replies)
hi i just cant figure out how can i do this ls -lt > log.txt using $PWD
what i mean is how can i get the ls command content into a file using $PWD variable? :confused: (4 Replies)
Hi,,
I have the line below in a file:
$!VarSet |LFDSFN1| = '"E:\APC\Trials\20140705_427_Prototype Trial\Data\T4_20140705_Trial_Cycle_Data_13_T_Norm.txt" "VERSION=100 FILEEXT=\"*.txt\" FILEDESC=\"General Text\" "+""+"TITLE{SEARCH=NONE NAME=\"New Dataset\" LINE=1I want to write a script to change... (2 Replies)
Discussion started by: carlr
2 Replies
LEARN ABOUT SUNOS
exec
exec(1) User Commands exec(1)NAME
exec, eval, source - shell built-in functions to execute other commands
SYNOPSIS
sh
exec [argument...]
eval [argument...]
csh
exec command
eval argument...
source [-h] name
ksh
*exec [arg...]
*eval [arg...]
DESCRIPTION
sh
The exec command specified by the arguments is executed in place of this shell without creating a new process. Input/output arguments may
appear and, if no other arguments are given, cause the shell input/output to be modified.
The arguments to the eval built-in are read as input to the shell and the resulting command(s) executed.
csh
exec executes command in place of the current shell, which terminates.
eval reads its arguments as input to the shell and executes the resulting command(s). This is usually used to execute commands generated as
the result of command or variable substitution.
source reads commands from name. source commands may be nested, but if they are nested too deeply the shell may run out of file descrip-
tors. An error in a sourced file at any level terminates all nested source commands.
-h Place commands from the file name on the history list without executing them.
ksh
With the exec built-in, if arg is given, the command specified by the arguments is executed in place of this shell without creating a new
process. Input/output arguments may appear and affect the current process. If no arguments are given the effect of this command is to mod-
ify file descriptors as prescribed by the input/output redirection list. In this case, any file descriptor numbers greater than 2 that are
opened with this mechanism are closed when invoking another program.
The arguments to eval are read as input to the shell and the resulting command(s) executed.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
EXIT STATUS
For ksh:
If command is not found, the exit status is 127. If command is found, but is not an executable utility, the exit status is 126. If a redi-
rection error occurs, the shell exits with a value in the range 1-125. Otherwise, exec returns a zero exit status.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO csh(1), ksh(1), sh(1), attributes(5)SunOS 5.10 17 Jul 2002 exec(1)