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From: Josh MacDonald <jmacd@CS.Berkeley.EDU>
Message-Id: <199601120704.XAA07215@paris.CS.Berkeley.EDU>
To: Nate Williams <nate@sri.mt.net>
cc: freebsd-hackers@freebsd.org
Subject: Re: mktemp() sucks, why not fix it? 
In-reply-to: Your message of "Thu, 11 Jan 1996 22:14:59 MST."
             <199601120514.WAA23403@rocky.sri.MT.net> 
Date: Thu, 11 Jan 1996 23:04:38 -0800
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Sorry, that my strings were not writable misses the point.
That was my contrived example to illustrate the real problem,
which is not addressed by what you wrote.

Say that I malloced those segments and reread my message, that
wasn't the problem.  I was calling mktemp on heap allocated
memory segments in my program when I stumbled upon this problem.

-josh

> I'll be the first call to mktemp fails as well, unless you happen to be
> compiling with -fwritable-strings.
> 
> You have to pass in data to mktemp which can be modified, which neither
> of the above strings can be.
> 
> Try this instead:
> int
> main()
> {
>     char buf1[255], buf2[255];
> 
>     strcpy(buf1, "/tmp/foo.XXXXXX");
>     strcpy(buf2, "/tmp/foo.XXXXXX");
>     if ( mktemp(buf1) == NULL )
>         perror("mktemp() failed");
>     symlink("/tmp/existsbutnotdirectory/foo", buf1);
>     if(mktemp(buf2) == NULL)
>         perror("mktemp() failed");
>     printf("buf1 = %s\nbuf2 = %s\n", buf1, buf2);
> }
> 
> 
> Nate