tok_strlist.c

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

#ifndef __unix__
#error Please use unix or replace the unix syscalls with functions/syscalls available on your system. After you have done that, remove this error
#endif

#include <unistd.h>
#include <sys/types.h>


char** atokl(char* InC, char* delim, long unsigned int* len){
  char** tok=(char**)malloc(2*sizeof(char*));
  //printf("%p\n", tok);

  tok[0]=strtok(strdup(InC), delim);
  {
  int i=1;
  while(tok[i-1]!=NULL){
    tok=(char**)realloc(tok, (i+1)*sizeof(char*));
    tok[i]=strtok(NULL, delim);
    //printf("%p\n", tok[i]);
    i++;
  
  }
  *len=i;
  /*EBRACE*/}
   
  return tok;
}

typedef struct _arr{
    char* arr;
    size_t len;
}arr_t;

typedef char** strlist;

void printstrlist(strlist s){
    for(size_t i=0;s[i]!=0x0;i++){
        write(1, s[i], strlen(s[i]));
    }
}

int main(void){
    arr_t a;
    a.arr=(char*)atokl("word1,word2,word3", ",", &a.len);
    printstrlist((char**)a.arr);
    return 0;
}