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How to alias this awk?

 
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# 1  
Old 02-09-2016
How to alias this awk?
Hi,

I am running the following df command to display df in GB. I am not able to use df -h on this server as that option is not available.

Code:
 
 df -k /tmp | awk 'NR==1 {CNV=1024*1024;GBYTES="GBytes";FMT="%-35s %-10s %-10s %-10s %10s %-s\n"; printf FMT, $1, GBYTES, $3, $4, $5, $6; next} {printf FMT,$1,$2/CNV,$3/CNV,$4/CNV,$5,$6}'

Sample output below:

Code:
 
 $: df -k /tmp | awk 'NR==1 {CNV=1024*1024;GBYTES="GBytes";FMT="%-35s %-10s %-10s %-10s %10s %-s\n"; printf FMT, $1, GBYTES, $3, $4, $5, $6; next} {printf FMT,$1,$2/CNV,$3/CNV,$4/CNV,$5,$6}'
  
 Filesystem                          GBytes     used       avail        capacity Mounted
swap                                33.2402    0.0285187  33.2117            1% /tmp

I tried to alias this as below:

Code:
alias x='df -k $1 | awk \'NR==1 {CNV=1024*1024;GBYTES="GBytes";FMT="%-35s %-10s %-10s %-10s %10s %-s\n"; printf FMT, $1, GBYTES, $3, $4, $5, $6; next} {printf FMT,$1,$2/CNV,$3/CNV,$4/CNV,$5,$6}\''

But it is 'complaining' that there is a missing single quote. After running the alias above, it presents me a > instead.

Currently, the workaround that I am doing is to create dummy script named /tmp/df_g.ksh

Code:
 
 #!/bin/ksh
 df -k $1 | awk 'NR==1 {CNV=1024*1024;GBYTES="GBytes";FMT="%-35s %-10s %-10s %-10s %10s %-s\n"; printf FMT, $1, GBYTES, $3, $4, $5, $6; next} {printf FMT,$1,$2/CNV,$3/CNV,$4/CNV,$5,$6}'
 exit 0

And then I included the following in my .profile.

Code:
 
 alias df_g='/tmp/df_g.ksh'

Now, I can run it as df_g /tmp.

Is there any way that I can alias the awk without using the dummy script?
# 2  
Old 02-09-2016
Hello newbie_01,

You could add the variable directly into the .profile as follows, I tried in bash and it worked successfully for me.
Off course use a new session for server after adding this to .profile to make alias effective.
Code:
X=`df -k /tmp | awk 'NR==1 {CNV=1024*1024;GBYTES="GBytes";FMT="%-35s %-10s %-10s %-10s %10s %-s\n"; printf FMT, $1, GBYTES, $3, $4, $5, $6; next} {printf FMT,$1,$2/CNV,$3/CNV,$4/CNV,$5,$6}'`
export X;

In a new session for server as follows I got value.
Code:
echo $X
Filesystem GBytes Used Available Use% Mounted tmpfs 0.5 0.000367655 0.493422 1% /tmp

EDIT: You could use $ also for the command to put it into the alias name as follows.
Code:
X=$(df -k /tmp | awk 'NR==1 {CNV=1024*1024;GBYTES="GBytes";FMT="%-35s %-10s %-10s %-10s %10s %-s\n"; printf FMT, $1, GBYTES, $3, $4, $5, $6; next} {printf FMT,$1,$2/CNV,$3/CNV,$4/CNV,$5,$6}')
export X;

Thanks,
R. Singh
Last edited by RavinderSingh13; 02-09-2016 at 05:12 AM.. Reason: Added one more solution where placing the value of command into alias name by using $ too now.
# 3  
Old 02-09-2016
Please be aware that RavinderSingh13's proposal reflects the situation at login. No development during the session could be monitored.

---------- Post updated at 10:27 ---------- Previous update was at 10:20 ----------

Try escaping certain meta chars:
Code:
alias DF="df -k /tmp | awk 'NR==1 {CNV=1024*1024;GBYTES=\"GBytes\";FMT=\"%-35s %-10s %-10s %-10s %10s %-s\n\"; printf FMT, \$1, GBYTES, \$3, \$4, \$5, \$6; next} {printf FMT,\$1,\$2/CNV,\$3/CNV,\$4/CNV,\$5,\$6}'"

# 4  
Old 02-09-2016
Try using a function instead of an alias, which allows you to use parameters:

Code:
x() {
  df -k "$1" | awk 'NR==1 {CNV=1024*1024;GBYTES="GBytes";FMT="%-35s %-10s %-10s %-10s %10s %-s\n"; printf FMT, $1, GBYTES, $3, $4, $5, $6; next} {printf FMT,$1,$2/CNV,$3/CNV,$4/CNV,$5,$6}'
}

Code:
x /tmp

--
It also allows you to make it more readable:
Code:
x() {
  df -k "$1" | 
  awk '
    NR==1 {
      CNV=1024*1024
      FMT="%-35s %-10s %-10s %-10s %10s %-s\n"
      printf FMT, $1, "GBYTES", $3, $4, $5, $6
      next
    }
    {
      printf FMT,$1,$2/CNV,$3/CNV,$4/CNV,$5,$6
    }
  '
}

Last edited by Scrutinizer; 02-09-2016 at 03:14 PM..
 
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