Script to verify if a given C string is a permutation of other C string

gistfile1.c

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

char *sortString (char *stringToSort)
{
	int stringLenght = strlen(stringToSort);
	char *sortedString = strdup(stringToSort);

	for (int i = 0; i < stringLenght; ++i)
	{
		for (int j = i; j < stringLenght; ++j)
		{
			int char1 = stringToSort[i];
			int char2 = stringToSort[j];

			if(char1 > char2)
			{
				sortedString[j] = stringToSort[i];
				sortedString[i] = stringToSort[j];

				stringToSort = strdup(sortedString);
			}
		}
	}

	printf("Sorted string: %s\n", sortedString);
	return sortedString;
}


bool isPermutation (char *sourceString, char *stringToValidate)
{
	int sourceStringLenght = strlen(sourceString);
	int stringToValidateLenght = strlen(stringToValidate);

	if(sourceStringLenght != stringToValidateLenght) return false;

	sourceString = sortString(sourceString);
	stringToValidate = sortString(stringToValidate);

	return (strcmp(sourceString, stringToValidate) == 0);
}


int main(int argc, char const *argv[])
{
	char *string1 = "abc";
	char *string2 = "bac";

	if(isPermutation(string1,string2))
	{
		printf("Omg it's a permutation");
	}
	else
	{
		printf("It isn't a permutation");
	}

	return 0;
}