[ILUG] C string concat question ??

[Justin Mason]

Glen Gray said:

> Looking for a simple way to cat two strings into a third.
> I had the following in my code
> 
> msg = strdup(strcat(strvar1, strvar2));
> 
> What happens here is the strvar2 is concatinated to strvar1 and a
> pointer to strvar1 is returned to strdup which allocates memeory for the
> char *message variable.
> 
> What I want is that functionality without strvar1 being modified. I
> would rather not have to create my own buffer and do it over two lines. 
> 
> I thought this was interesting as I couldn't see and alternative to
> strcat. Hope someone else can.

Save yourself some pain, use snprintf.

	snprintf (msg, sizeof(msg), "%s%s", strvar1, strvar2);

bonus: no need to worry about any security implications as well ;)

--j.