I have a program that generates a string of the binary data of an image. (I mean, if I take the output of the program, paste it into a text editor and save with a PNG extension, it's a valid image.)
Now I want to take this string and pipe it into a command-line bash program. Something like this:
Code:
echo "$a" | newcommand
However, since my string contains all that binary stuff (including, I guess newlines and quotes and stuff), the result of the echo is NOT the contents of the string.
What can I do to ensure that the result of echo is identical to the string contents? Also, note that the string is not a bash variable - it is located in a script.
To prevent the echo command from interpreting the newlines, double quotes and stuff, you would have to escape them using the '\' character. However, since this is a generated string, you cannot do that. The best thing to do here would be to redirect the generated string to some file and then run the following command:
Hi guys,
Been messing around with shell programming for a couple of days and I found something that was pretty odd in the behavior of the echo command. Below is an example-:
When I type the following in my /home directory from my lxterminal in Debian-:
echo "`ls -l`"
I get the... (2 Replies)
Im stumped on this one. Id like to echo into a .txt file all names for an xml feed in a huge folder. Can that be done?? Id need to echo <name>This name</name> in client.xml files.
$path="/mnt/windows/path"
echo 'recording names'
cd "$path"
for names in $path
than Im stuck on... (2 Replies)
I came across and unexpected behavior with redirections in tcsh. I know, csh is not best for redirections, but I'd like to understand what is happening here.
I have following script (called out_to_streams.csh):
#!/bin/tcsh -f
echo Redirected to STDOUT > /dev/stdout
echo Redirected to... (2 Replies)
Hi friends,
i am using the following grep command for exact word match:
>echo "sachin#tendulkar" | grep -iw "sachin"
output: sachin#tendulkar
as we can see in the above example that its throwinng the exact match(which is not the case as the keyword is sachin and string is... (6 Replies)
QUESTION1:
How do you grep only an exact string. I am using Solaris10 and do not have any GNU products installed.
Contents of car.txt
CAR1_KEY0
CAR1_KEY1
CAR2_KEY0
CAR2_KEY1
CAR1_KEY10
CURRENT COMMAND LINE: WHERE VARIABLE CAR_NUMBER=1 AND KEY_NUMBER=1
grep... (1 Reply)
echo `echo ` doesn't echoes anything. And it's logic. But
echo `echo `echo ` ` does echoes "echo". What's the logic of it? the `echo `echo ` inside of the whole (first) echo, echoes nothing, so the first echo have to echo nothing but echoes "echo"
(too much echoing :P):o (2 Replies)
Bit of a weird one i suppose, i want to use an echo inside an echo... For example...
i have a script that i want to use to take users input and create another script. Inside this script it creates it also needs to use echos...
echo "echo "hello"" >$file
echo "echo "goodbye"" >$file
... (3 Replies)
So in my shell i execute:
{ while true; do echo string; sleep 1; done } | read line This waits one second and returns.
But
{ while true; do /bin/echo string; sleep 1; done } | read line continues to run, and doesn't stop until i kill it explicitly.
I have tried this in bash as well as zsh,... (2 Replies)
Hi,
I am writing a script in Bourne shell
#!/bin/sh
used=`quota -v | tail -1 | awk '{print $2}'`
total=`quota -v | tail -1 | awk '{print $3}'`
echo "$used"
echo "$total"
perc=`expr ${used} / ${total} * 100 | bc`
echo "$perc"
I want to get a percentage of quota used to total limit
I... (5 Replies)
Hi,
How do i pick a particular value from a group of lines using python.
for instance from the below sample. How do I pick Value=1 of OuterLines=1 and InnerLine=1 (11 Replies)
