12-07-2011
Start by looking at the log to see how you would identify a line which contains a connection from an IP address. This will be the rule for your first grep. If the whole log is just connections you don't need this stage.
Then look at sample connection lines and come up with some simple way of defining where the IP address is on that line (e.g. 5th space-delimited field). This will dictate your method to extract the IP address prior to sorting and counting. (If you have not studied "awk" this might just involve using "cut").
If there is no clear rule to fish out the IP address then you could be looking at a grep which finds patterns like nnn.nnn.nnn (or nnn.nnn.nnn.nnn if this is IP6) where nnn is a number 0-255 . Let's hope it is a simple format log.
We don't know what your log file looks like. Can you post a couple of sample lines.
There is a current thread on this board which may get you started on how to count occurances in a list.
https://www.unix.com/unix-dummies-que...xist-file.html
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LEARN ABOUT OPENSOLARIS
mktemp
mktemp(3C) Standard C Library Functions mktemp(3C)
NAME
mktemp - make a unique file name from a template
SYNOPSIS
#include <stdlib.h>
char *mktemp(char *template);
DESCRIPTION
The mktemp() function replaces the contents of the string pointed to by template with a unique file name, and returns template. The string
in template should look like a file name with six trailing 'X's; mktemp() will replace the 'X's with a character string that can be used to
create a unique file name. Only 26 unique file names per thread can be created for each unique template.
RETURN VALUES
The mktemp() function returns the pointer template. If a unique name cannot be created, template points to a null string.
ERRORS
No errors are defined.
EXAMPLES
Example 1 Generate a filename.
The following example replaces the contents of the "template" string with a 10-character filename beginning with the characters "file" and
returns a pointer to the "template" string that contains the new filename.
#include <stdlib.h>
...
char *template = "/tmp/fileXXXXXX";
char *ptr;
ptr = mktemp(template);
USAGE
Between the time a pathname is created and the file opened, it is possible for some other process to create a file with the same name. The
mkstemp(3C) function avoids this problem and is preferred over this function.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Safe |
+-----------------------------+-----------------------------+
SEE ALSO
mkstemp(3C), tmpfile(3C), tmpnam(3C), attributes(5), standards(5)
SunOS 5.11 15 Sep 2004 mktemp(3C)