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Full Discussion: Loop through files in a directory
Top Forums Shell Programming and Scripting Loop through files in a directory Post 302902971 by ali.seifaddini on Friday 23rd of May 2014 09:08:52 AM
Old 05-23-2014
Loop through files in a directory
Hello

How do I loop through files in a specific directory ?

This script is not working!

Code:
#! /bin/bash
FILES=/usr/desktop/input/*
For f in $FILES;
do
awk '-v A="$a" -v B="$b" {$6=($1-64)/2 ;$7=((10^($6/10))/A)^(1/B) ; print}' OFS="\t" $f > /root/Desktop/output/$f.txt;
done

Orginal txt file:

Code:
$1      $2            $3             $4
74   3.99166 101.37082  2.000
74   3.99166 101.37834  2.000
75   3.98416 101.37082  2.000
75   3.98416 101.37834  2.000
81   3.96916 101.29571  2.000
  0   3.96166 101.28820  2.000
 82   3.96166 101.29571  2.000
 85   3.96167 101.31073  2.000


Expected result:

Code:
$1         $2             $3                $4                  $5        $6
74	3.99166	101.37082	2.000		5	0.0748783
74	3.99166	101.37834	2.000		5	0.0748783
75	3.98416	101.37082	2.000		5.5	0.0804649
75	3.98416	101.37834	2.000		5.5	0.0804649
81	3.96916	101.29571	2.000		8.5	0.12391
0	3.96166	101.28820	2.000		-32	0.000364633
82	3.96166	101.29571	2.000		9	0.133155
85	3.96167	101.31073	2.000		10.5	0.165237

Thanks in advance
 

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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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