Newbie looking for bash scripting help

[jdh239]

I have about 2 or 3 questions.

Using a for loop (for i in $(command);do echo $i;done) how can I get it to accept a full line as a var?

ie

param1 param2 param3

comes out as
param1
param2
param3

How can I get it to take the whole line as a var? (I will have multiple lines)

Part 2: How can I take that same line, and left align the line and the right align personal output?

ie

p1 p2 p3<---- left align, right align ----------------->FAIL
p1 p2 p3<---- left align, right align ----------------->PASS

?

Thanks in advance

[likwid]

put param1 2 and 3 in quotes, and it will get passed as a whole line. You can demonstrate this with a simple script:

#!/bin/bash
for i in $@; do
   echo $i
done
echo "NOW WITH QUOTES"
for i in "$@"; do
   echo $i
done

Run the program like ./program one two three four five and see what happens.

[likwid]

As far as part two goes, if you're only doing PASS or FAIL, echo COLS - 6 spaces, then echo pass or fail. I don't know of an easier way really.
So something like

#!/bin/bash
for i in "$LINE"; do
   echo -n $LINE
   while (COUNT < COLS - 6); do
      echo -n ' '
      let COUNT+=1
   done
   echo $STATUS
done

[jdh239]

put param1 2 and 3 in quotes, and it will get passed as a whole line. You can demonstrate this with a simple script:

#!/bin/bash
for i in $@; do
   echo $i
done
echo "NOW WITH QUOTES"
for i in "$@"; do
   echo $i
done

Run the program like ./program one two three four five and see what happens.

Actually, my inputed text will be dynamic. I am pulling it from netstat.

[jdh239]

As far as part two goes, if you're only doing PASS or FAIL, echo COLS - 6 spaces, then echo pass or fail. I don't know of an easier way really.
So something like

#!/bin/bash
for i in "$LINE"; do
   echo -n $LINE
   while (COUNT < COLS - 6); do
      echo -n ' '
      let COUNT+=1
   done
   echo $STATUS
done

I keep trying the above, but get failures. I have also tried replacing COLS with COLUMNS without success.

#!/bin/bash

STATUS="FAIL"

TEST="1 2 3 4 5"

for i in "$TEST"; do
echo -n $TEST
while (COUNT < COLS - 6); do
echo -n ' '
let COUNT+=1
done
echo $STATUS
done

--------------------------------- RESULTS ------------------------

# ./test.sh
1 2 3 4 5./test.sh: line 9: COLUMNS: No such file or directory
FAIL

[ghostdog74]

Just one qns for you, you want to parse netstat's output right? Show what you want to see from netstat's output.

[jdh239]

Just one qns for you, you want to parse netstat's output right? Show what you want to see from netstat's output.

xxx.xxx.xxx.132:22 0.0.0.0:* LISTEN
xxx.xxx.xxx.132:143 xxx.xxx.xxx.xxx:1407 ESTABLISHED
xxx.xxx.xxx.133:22 xxx.xxx.xxx.xxx:1408 ESTABLISHED
xxx.xxx.xxx.133:143 xxx.xxx.xxx.xxx:1407 ESTABLISHED

I want most left aligned and LISTEN, ESTABLISHED, ETC right aligned. I want to color them based on the local IP (multiple IPs bound). The color code I can do, just the other stuff I am having issues with

[ghostdog74]

xxx.xxx.xxx.132:22 0.0.0.0:* LISTEN
xxx.xxx.xxx.132:143 xxx.xxx.xxx.xxx:1407 ESTABLISHED
xxx.xxx.xxx.133:22 xxx.xxx.xxx.xxx:1408 ESTABLISHED
xxx.xxx.xxx.133:143 xxx.xxx.xxx.xxx:1407 ESTABLISHED

I want most left aligned and LISTEN, ESTABLISHED, ETC right aligned. I want to color them based on the local IP (multiple IPs bound). The color code I can do, just the other stuff I am having issues with

how did you execute your netstat...with options? if yes, which options? netstat output is supposed to be aligned very nicely for you, as far as i know.....otherwise, i might have missed something ...

[jdh239]

how did you execute your netstat...with options? if yes, which options? netstat output is supposed to be aligned very nicely for you, as far as i know.....otherwise, i might have missed something ...

I was able to accomplish my goal by using an array. Took me a while, but working now.

Thanks.

[likwid]

Yea sorry about that syntactical error up there (i've been doing a lot of c lately) it should be

while [ $COUNT -lt $(($COLS - 6)) ]; do
   echo whatyouwanthere
   let COUNT+=1
done

It was saying that because > isn't used for comparison in Bash, it's used for file redirection.