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Text about Kerberos errors.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@16194 ec53bebd-3082-4978-b11e-865c3cabbd6b
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Love Hörnquist Åstrand
2005-10-19 21:30:07 +00:00
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doc/programming.texi
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@@ -81,6 +81,23 @@ See also manual page for @manpage{krb5_ccache,3}
@subsection Kerberos errors
Kerberos errors are based on the com_err library. All error codes are
32-bit signed numbers, the first 24 bits define what subsystem the
error originates from, and last 8 bits are 255 error codes withing the
library. Each error code have fixed string associated with it. For
example, the error-code -1765328383 have the symbolic name
KRB5KDC_ERR_NAME_EXP, and associated error string ``Client's entry in
database has expired''.
This is a great improvment compared to just getting one of the unix
error-codes back. However, Heimdal have an extention to pass back
customized errors messages. Instead of getting ``Key table entry not
found'', the user might back ``failed to find
host/host.example.com@@EXAMLE.COM(kvno 3) in keytab /etc/krb5.keytab
(des-cbc-crc)''. This improves the chance that the user find the
cause of the error so you should use the customized error message
whenever its avaible.
See also manual page for @manpage{krb5_get_error_string,3} and
@manpage{krb5_get_err_text,3}.