Re: using local buffers.

From: Herbert Kremser (
Date: 09/15/95

On Thu, 14 Sep 1995, Scatter wrote:

> > Btw, I know I can 'return "string"' in order to return a string from a 
> > char* function, but if I have a local buffer, how would I return a string 
> > in the same manner without returning the address of the local buffer?
> char *some_fun(char *str){
>     char my_buf[SOME_LENGTH];
>     strcpy(my_buf, str);
>     return(strdup(my_buf));
> }
> A worthless piece of code that should answer your question.
> /*  I hate posting code, cuz I'm just too damn insecure :) */

I guess it's not a good idea to post such code without comments in this
list. From my experience there are some C newbies in this group too,
and your "solution" could lead them to some mistakes.

First, the strcpy in your example is rather useless, as the declaration
of the variable my_buf, but well, the question was how to return a local
buffer.  :)

But you shouldn't forget to mention for C-newbies, that strdup allocates
memory for the string, and therefore needs to be free'd if it's no longer

I guess the original poster didn't want to allocate memory, but rather
wants what is called a static variable.

char *some_fun(int secret)
  static char my_buf[SOME_LENGTH];

  sprintf(my_buf, "The secret number is %d.", secret);
  return  my_buf;


[on public request 12 lines of signature deleted]  *snip* ;)

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