One thing to note is that if you are running as non-root, the real and saved uid are not changed to the new uid.
setuid() will set the uid for the current process only, existing children and parents are unaffected (although children spawned after a setuid() will inherit the parent's new uid). Threads are a different matter, under Linux a setuid() affects only the calling thread but I believe that on most other Unices a setuid() in a thread will affect all threads. One common mistake when using setuid()/setgid() is to call them in the order setuid(), setgid() which won't work because once you have dropped root privileges with setuid(), the setgid() won't work unless the gid matches your effective or saved gid, so do a setgid() followed setuid() to drop root group privileges.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|
