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Full Discussion: comparing files - adding/subtracting/formating columns
Top Forums Shell Programming and Scripting comparing files - adding/subtracting/formating columns Post 302202799 by oabdalla on Thursday 5th of June 2008 05:03:43 PM
Old 06-05-2008
comparing files - adding/subtracting/formating columns
I have two files:
file1.txt:
FS Total Used Free Used%
/u01 10000 8000 2000 80%
/u02 10000 8000 2000 80%
/u03 10000 8000 2000 80%
/u04 10000 8000 2000 80%
/u05 10000 8000 2000 80%
/u06 10000 8000 2000 80%
/u07 10000 8000 2000 80%
/u10 10000 5000 5000 50%

file2.txt:
FS Adj
/u01 1,500
/u05 500
/u10 2,500

I would like to compare them using the first column in each file and create an output from both that looks like the following:

FS Total Used+Adj Free-Adj (Used+Adj)/Total
--------- -------- --------- --------- ---------
/u01 10,000 9,500 500 95%
/u02 10,000 8,000 2,000 80%
/u03 10,000 8,000 2,000 80%
/u04 10,000 8,000 2,000 80%
/u05 10,000 8,500 1,500 85%
/u06 10,000 8,000 2,000 80%
/u07 10,000 7,500 2,500 75%

Please note that all lines from file1.txt are listed, and column "adj" of file2.txt is added to column "Used" and subtracted from column "Free" of file1.txt only if there is a match.

I was able to produce this report only after loading these files into a database but I am sure I can do it using shell scripting with your help.

Thanks,
Omer
 

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LEARN ABOUT OSX

ualarm

UALARM(3)						   BSD Library Functions Manual 						 UALARM(3)

NAME

     ualarm -- schedule signal after specified time

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     useconds_t
     ualarm(useconds_t useconds, useconds_t interval);

DESCRIPTION

     This is a simplified interface to setitimer(2).

     The ualarm() function waits a count of useconds before asserting the terminating signal SIGALRM.  System activity or time used in processing
     the call may cause a slight delay.

     If the interval argument is non-zero, the SIGALRM signal will be sent to the process every interval microseconds after the timer expires
     (e.g., after useconds number of microseconds have passed).

     Due to a setitimer(2) restriction, the maximum number of useconds and interval is limited to 100,000,000,000,000 (in case this value fits in
     the unsigned integer).

RETURN VALUES

     When the signal has successfully been caught, ualarm() returns the amount of time left on the clock.

NOTES

     A microsecond is 0.000001 seconds.

SEE ALSO

     getitimer(2), setitimer(2), sigpause(2), sigvec(2), alarm(3), signal(3), sleep(3), usleep(3)

HISTORY

     The ualarm() function appeared in 4.3BSD.

BSD
								  April 19, 1994							       BSD
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