On Wed, Apr 6, 2011 at 12:19 PM, Cyril Hrubis <[email protected]> wrote:
> Hi!
>> > Not all systems have /bin/true. It would be better to do:
>> >
>> > /bin/sh -c ':'
>> >
>> > etc, as we have code that depends on this type of shell-required POSIX
>> > behavior.
>> >
>> I'm sorry for I cannot figure out how to do this way. I tried, but
>> cannot crash unpatched kernel anymore. So I think the simple workaround
>> is checking if /bin/true installed in the program:
>
> It should as simple as execve("/bin/sh -c ':'", c, c), or that didn't work?
execve doesn't work that way. It should be:
execve("/bin/sh", "sh", "-c", ":");
> What about "/bin/sh -c ''" ?
That just seems like one's trying to be clever and that might not work
with all shells.
Thanks,
-Garrett
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