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[Bug 1001490] C99 snprintf() does not include terminated null in truncated strings
- From: bugzilla-daemon at bugs dot ecos dot sourceware dot org
- To: ecos-patches at ecos dot sourceware dot org
- Date: Wed, 8 Aug 2012 08:30:48 +0100
- Subject: [Bug 1001490] C99 snprintf() does not include terminated null in truncated strings
- Auto-submitted: auto-generated
- References: <bug-1001490-104@http.bugs.ecos.sourceware.org/>
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--- Comment #4 from Bernd Edlinger <bernd.edlinger@hotmail.de> 2012-08-08 08:30:42 BST ---
(In reply to comment #3)
oops, sorry... Now I see, actually I applied the my own patch from
http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001628
a while ago, it contained a new test case...
// Check 7
ret = snprintf(y, 20, "bit of that: %.4g double", 1.0012);
my_strcpy(z, "bit of that: 1.001 ");
CYG_TEST_PASS_FAIL(my_strcmp(y,z) == 0,
"snprintf double test #2");
CYG_TEST_PASS_FAIL(ret == my_strlen(z),
"snprintf double test #2 return code");
when that did fail after applying your patch, I was surprised.
Well, there is more trouble with sprintf....
There is another bug #20804, about the %e format, that is also still
not fixed.
When I tried to understand, why that happens, I found a buffer overflow
in the statement: printf("%.15f", DBL_MAX);
There is a buffer in vfnprintf() which is 2 characters too small.
Maybe there should be a patch for all of the known issues.
What do you think?
Bernd.
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