Re: mktemp()

[Jan-Benedict Glaw <jbglaw@lug-owl.de>]

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On Sat, 2004-06-05 14:17:05 +0600, Progga <abulfazl@juniv.edu>
wrote in message <20040605141705.A681@Imrashi.net.bd>:
> On Sat, Jun 05, 2004 at 05:55:26AM +0100, Glynn Clements wrote:

>  Does the above mean that mktemp( "abcXXXXXX" ) can return "abc123456" even if
> there's a symlink with the name "abc123456" ?

No. This one has good chances to SIGSEGV before it returns at all:)

---------------------------------
char *my_temp_template = "abcXXXXXX";
char *my_temp_file;

my_temp_file = mktemp (my_temp_template);
if (!my_temp_file)
	errex ("Couldn't create temp file\n");
---------------------------------
The above one may SEGV as well, because the template may be stored in
memory marked as read-only.

This one will work:
---------------------------------
char my_temp_template[] = "abcXXXXXX";
char *my_temp_file;

my_temp_file = mktemp (my_temp_template);
if (!my_temp_file)
	errex ("Couldn't create temp file\n");
---------------------------------

Also, I remember there was at least one compiler (some older MAC OS?)
which didn't add the final \0 on it's own to xxx[]...

MfG, JBG

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