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

int
main(int argc, char **argv) {

  char *sentence =  "500053 This is a string";
  char *vhost;
  char str1[8] ="";

  int i;
  //for(i=0;i < strlen(sentence) && sentence[i] != 32; i++); 
  for(i=0;sentence[i] != 0 && sentence[i] != 32; i++);

  printf("stop-char(%d): '%c'\n",i,sentence[i-1]);
  vhost = strncpy(str1,sentence,i);

  char logentry[sizeof(sentence)-sizeof(vhost)];

  for(++i; i < strlen(sentence); i++) {
    logentry[i] = sentence[i];
    printf("logentry[%c] = sentence[%c]\n",logentry[i],sentence[i]);
  }

  printf("input is: %s\n",sentence);
  printf("vhost is: '%s'\n",vhost);
  printf("logentry is: '%s'\n",logentry);

}


------------------- OUTPUT --------------------
db@gonzalez:~>./test
stop-char(6): '3'
logentry[T] = sentence[T]
logentry[h] = sentence[h]
logentry[i] = sentence[i]
logentry[s] = sentence[s]
logentry[ ] = sentence[ ]
logentry[i] = sentence[i]
logentry[s] = sentence[s]
logentry[ ] = sentence[ ]
logentry[a] = sentence[a]
logentry[ ] = sentence[ ]
logentry[s] = sentence[s]
logentry[t] = sentence[t]
logentry[r] = sentence[r]
logentry[i] = sentence[i]
logentry[n] = sentence[n]
logentry[g] = sentence[g]
input is: 500053 This is a string
vhost is: '500053'
logentry is: 'F'