how to replace substring in c?

Question

This example works but I think that the memory leaks. Function used in the simple web server module and thus shared memory grows if you use this function.

Answer 1

This will replace all occurrence of "str" with "rep" in "src"...

void strreplace(char *src, char *str, char *rep)
{
    char *p = strstr(src, str);
    do  
    {   
        if(p)
        {
            char buf[1024];
            memset(buf,'\0',strlen(buf));

            if(src == p)
            {
                strcpy(buf,rep);
                strcat(buf,p+strlen(str));  
            }
            else
            {
                strncpy(buf,src,strlen(src) - strlen(p));
                strcat(buf,rep);
                strcat(buf,p+strlen(str));
            }

            memset(src,'\0',strlen(src));
            strcpy(src,buf);
        }   

    }while(p && (p = strstr(src, str)));
}