Parsing strings with multiple delimiters

ptoken.c

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

char *sep[] = {";", "=", ":", ",", NULL};
char string[] = "entertitle=uncollapse,grabkeys;"
	"enterslave=grabkeys;leaveslave=collapse,ungrabkeys;"
	"button1=menuexec;button2=togglestick;button3=exit:13;"
	"button4=scrollup;button5=scrolldown;"
	"key_Up=scrollup;key_Down=scrolldown;"
	"key_Escape=ungrabkeys,exit";

int split( char *input, int i )
{
	char *token;
	char *remain;	// Remainder of string to be parsed

	// For the first call to strtok: token != NULL && token == input
	token = strtok_r(input, sep[i], &remain);
	printf("   %s\n", token);

	while(token != NULL) {
		/* Inefficient because terminates after all delimiters
		   were checked. Too many calls to strtok() */
		if (sep[i+1] != NULL) {
			split(token, i+1);
		}
		token = strtok_r(NULL, sep[i], &remain);
		if (token != NULL)
			printf("%s\n", token);
	}
}

int main()
{
	split(string, 0);
}