question about strtok_r built-in function in C

If a string has many words in it then, strtok_r will not work correctly.
Note: A word within a string is separated by a blank space.
s_1 output is incorrect. s_1 should be 10.4.0.1

If a string has only one word in it, then strtok_r will work correctly.
s_2 output is correct. s_2 output is 10.4.0.1

Is there a function that will do what strtok_r except that it will
search for a long string that contains many words ? Using a built-in
function to search for a word or a character pattern within a very long
string saves time because I don 't have to use a loop with an if-then-else
statement.

==================================

root:/home# ./string_1
using strtok_r function. s_1 = bbb
using strtok_r function. s_2 = 10.4.0.1

==================================

I'm not sure you're using strtok_r correctly. You want to do something like this:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define TOKENS "."

int
main (int argc, char *argv[])
{
static char ip_addr[] = "10.4.0.1";
char *buf_pp = NULL;
char *s = NULL;
int count = 0;

/* Parse the first argument */
s = strtok_r (ip_addr, TOKENS, &buf_pp);

while (s) {
/* Increment count */
count++;

/* Print the current token */
printf ("token[%d]: 0x%02x\n",
count, atoi (s));

/* Get the next token until end of string */
s = strtok_r (NULL, TOKENS, &buf_pp);
}

/* Done */
return printf ("Done.\n");
}

You should see something like this:
token[1]: 0x0a
token[2]: 0x04
token[3]: 0x00
token[4]: 0x01


The key points are:
1. Call strtok_r() the first time *with* your target string; call it in a loop
to get the remaining tokens, call strtok_4 all subsequent times with a *NULL*
instead of your target string.

2. The delimiters string holds a list of *one character delimiters*.
In other words, saying "addr:" actually means "delimit on 'a' or on 'b' or on 'c' ...

3. You'd want one "save_pointer" for parsing all the tokens in one string, and
a *different* buffer pointer variable for parsing tokens from a different string.

Hope that helps .. PSM

Thank you paulsm4 for your help.

You can do what you're looking for strstr().

You'll probably want to check to make sure strstr() doesn't return NULL and such first if it's not "trusted input".

thank you itsme86 for your assistance.