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The solution isn't straight forward.


#define CH(x) #x[0]
#define DECR(a,b,c,d) decr( CH(a), CH(b), CH(c), CH(d) )



The two macros cause the satement

DECR( k, e, y, \0 );

to be...

Why not awk? It can be done in nearly any language, of course, but:

1) awk is especially good and efficient for this particular problem
2) everyone has an awk of some sort

Doing the same...

awk -v a=$start -v b=$end '$0 > a && $0 < b' timestamp.log

Input:
$ cat fil
1
4
6
8
10

Output:
$ awk '$0 > 2 && $0 <9' fil
4
6
8


Guru.

awk '{a[$1]+=$2;}END{for (i in a) print i, a[i];}' file

Guru.

Your second version processes each line of input one by one, but your first does not !

Because of this line ..

d=`sed 's/[0-9|.]* - [-|a-zA-Z]* \[\([0-9]*\/[a-zA-Z]*\/[0-9:]* [0-9+]*\)\]...

All the nawks that I know don't have the mktime built-in function. But Corona688's solution works without mktime (just omit mktime and the surrounding parentheses) since the date values are in "yyyy...

Welcome to the forum.

You didn't mention about the log file format. If it contains only the IP ADDRESS,
probably you can do something like,

$ cat f5
54.215.211.198
50.215.211.198...

Can you not have the contents of variable in files ?

If then, you can use paste file1 file2