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Full Discussion: How to pass IF condition via shell varibale in awk?
Top Forums Shell Programming and Scripting How to pass IF condition via shell varibale in awk? Post 302977772 by anillambait on Friday 22nd of July 2016 03:51:36 AM
Old 07-22-2016
How to pass IF condition via shell varibale in awk?
Hello,

I have one query regarding passing IF condition shell variable inside awk. Here is the case-

File content of keydefn.exp
Code:
201~2~LM Limit 02-current value~Limit 02    ~Limit02~Current~Value  ~N~Y~S~0~9999999
201~3~LM Limit 03-current value~Limit 03~Limit03~Current~Value~N~Y~S~-9999999~9999999

Case 1:
Code:
awk 'BEGIN{IGNORECASE=1;FS="~"}; { if ($2=="2") { print $0}}' keydefn.exp  ==> This is working fine!

Output:
Code:
201~2~LM Limit 02-current value~Limit 02    ~Limit02~Current~Value  ~N~Y~S~0~9999999


Case 2:
But when we move the IF condition in some variable like con='$2 == "2"' then it's not working

Code:
awk -v cond="$con" 'BEGIN{IGNORECASE=1;FS="~"}; { if (cond) { print $0}}' keydefn.exp  ==> This is not working

Output:
Code:
201~2~LM Limit 02-current value~Limit 02    ~Limit02~Current~Value  ~N~Y~S~0~9999999
201~3~LM Limit 03-current value~Limit 03~Limit03~Current~Value~N~Y~S~-9999999~9999999

Please suggest the reason!
Last edited by Scrutinizer; 07-22-2016 at 05:30 AM.. Reason: code tags
 

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LEARN ABOUT DEBIAN

softlimit

softlimit(8)						      System Manager's Manual						      softlimit(8)

NAME

       softlimit - runs another program with new resource limits.

SYNOPSIS

       softlimit [ opts ] child

DESCRIPTION

       opts is a series of getopt-style options.  child consists of one or more arguments.

       softlimit sets soft resource limits as specified by opts.  It then runs child.

OPTIONS

       In each of the following opts, n may be =, indicating that the soft limit should be set equal to the hard limit.

       opts controlling memory use:

       -m n   Same as -d n -s n -l n -a n.

       -d n   Limit the data segment per process to n bytes.

       -s n   Limit the stack segment per process to n bytes.

       -l n   Limit the locked physical pages per process to n bytes. This option has no effect on some operating systems.

       -a n   Limit the total of all segments per process to n bytes. This option has no effect on some operating systems.

       -o n   Limit the number of open file descriptors per process to n.  This option has no effect on some operating systems.

       -p n   Limit the number of processes per uid to n.

       opts controlling file sizes:

       -f n   Limit output file sizes to n bytes.

       -c n   Limit core file sizes to n bytes.

       Efficiency opts:

       -r n   Limit the resident set size to n bytes. This limit is not enforced unless physical memory is full.

       -t n   Limit the CPU time to n seconds. This limit is not enforced except that the process receives a SIGXCPU signal after n seconds.

SEE ALSO

       supervise(8),  svc(8),  svok(8),  svstat(8),  svscanboot(8),  svscan(8),  readproctitle(8), fghack(8), pgrphack(8), multilog(8), tai64n(8),
       tai64nlocal(8), setuidgid(8), envuidgid(8), envdir(8), setlock(8)

       http://cr.yp.to/daemontools.html

																      softlimit(8)
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