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Groups > comp.lang.python > #70237
| From | Grant Edwards <invalid@invalid.invalid> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: Python, Linux, and the setuid bit |
| Date | 2014-04-14 22:07 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <lihm6a$l3q$2@reader1.panix.com> (permalink) |
| References | <mailman.9260.1397511440.18130.python-list@python.org> <lihlgu$hjk$1@reader1.panix.com> <lihm24$l3q$1@reader1.panix.com> |
On 2014-04-14, Grant Edwards <invalid@invalid.invalid> wrote:
> On 2014-04-14, John Gordon <gordon@panix.com> wrote:
>>> char **envp_read;
>>> char **envp_write;
>>
>>> if (envp_write < envp_read)
>>> {
>>> memset(envp_write, 0, ((unsigned int) envp_read -
>>> (unsigned int) envp_write));
>>> }
>>
>> I think it's complaining about casting the char ** objects to unsigned int.
>
> If we assume that the author is trying to clear memory between the
> addresses pointed to by the two variables, then it's probably better
> be cast to (char *) before the subtracted.
Wow, I mangled that sentence. It should have been something like:
then it's probably better to cast them to (char *) before the
subtraction.
memset(envp_write, 0, ((char*)envp_read)-((char*)envp_write));
--
Grant Edwards grant.b.edwards Yow! My mind is making
at ashtrays in Dayton ...
gmail.com
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Python, Linux, and the setuid bit Ethan Furman <ethan@stoneleaf.us> - 2014-04-14 14:13 -0700
Re: Python, Linux, and the setuid bit John Gordon <gordon@panix.com> - 2014-04-14 21:55 +0000
Re: Python, Linux, and the setuid bit Grant Edwards <invalid@invalid.invalid> - 2014-04-14 22:04 +0000
Re: Python, Linux, and the setuid bit Grant Edwards <invalid@invalid.invalid> - 2014-04-14 22:07 +0000
Re: Python, Linux, and the setuid bit Richard Kettlewell <rjk@greenend.org.uk> - 2014-04-15 09:00 +0100
Re: Python, Linux, and the setuid bit Chris Angelico <rosuav@gmail.com> - 2014-04-15 18:15 +1000
Re: Python, Linux, and the setuid bit Richard Kettlewell <rjk@greenend.org.uk> - 2014-04-15 10:28 +0100
Re: Python, Linux, and the setuid bit Chris Angelico <rosuav@gmail.com> - 2014-04-15 19:35 +1000
Re: Python, Linux, and the setuid bit Chris Angelico <rosuav@gmail.com> - 2014-04-15 18:18 +1000
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