Question

I want to extract the base name from a string, like

/opt/home/etc/sample

That is, I want to parse a string of large length returning sample, or the substring
after the last / character. The string can be of any length.

How could this be done?

Answer 1

You can use strtok_r

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

int main ()
{
  char str[] ="This/a/sample/string";
  char * pch;
  char * ans;
  printf ("Splitting string \"%s\" into tokens:\n",str);
  pch = strtok_r (str,"/");
  if(pch==NULL)
  ans = str;
  while (pch != NULL)
  {
    ans = pch;
    pch = strtok_r (NULL, "/");
  }
  return 0;
}

P.S please check the code for some small errors