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<blockquote cite="mid:20070804160009.DAB7173195@hormel.redhat.com"
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<div><span class="625443921-03082007"><font face="宋体">I'm studying on
pam library , and I run the code given by "The Linux-PAM Application
Developer's Guide" on redhat linux.</font></span></div>
<div><span class="625443921-03082007"></span> </div>
<div><span class="625443921-03082007"><font face="宋体">"retval =
pam_authenticate(pamh, 0);" is running successfully</font></span></div>
<div><span class="625443921-03082007"></span> </div>
<div><span class="625443921-03082007"><font face="宋体">but the next
"retval = pam_acct_mgmt(pamh, 0);" return "PAM_AUTHINFO_UNAVAIL"</font></span></div>
<div><span class="625443921-03082007"></span> </div>
<div><span class="625443921-03082007"><font face="宋体">I don't know
what problem is it? Please do me a favour.</font></span></div>
<div><span class="625443921-03082007"></span> </div>
<div><span class="625443921-03082007"><font face="宋体">Thank you very
much</font></span></div>
<div><span class="625443921-03082007"></span> </div>
</blockquote>
Chu,<br>
<br>
there are several things in your program to be checked:<br>
<ol>
<li>have you already defined the 'service' 'check_user' in your pam.d
directory?<br>
If not, the behaviour will fall back to service 'other', which may be
missing too.</li>
<li>Does your conversation function 'conv' as defined in pam_start()
work well, i.e.<br>
does it query for a password? If not, you must supply a password via
pam_set_item()<br>
to make pam_authenticate work.</li>
</ol>
<br>
I suggest, you go and start a debugger (gdb) to look for what your
example program<br>
is doing in detail.<br>
<br>
Regards, <br>
Andreas<br>
<div class="moz-signature">-- <br>
Dr.-Ing. Andreas Schindler<br>
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