.\" Copyright (c) 2005 Kungliga Tekniska Högskolan
.\" (Royal Institute of Technology, Stockholm, Sweden).
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.\" $Id$
.\"
.Dd May 29, 2005
.Dt KCM 8
.Os
.Sh NAME
.Nm kcm
.Nd process-based credential cache for Kerberos tickets.
.Sh SYNOPSIS
.Nm
.Op Fl Fl cache-name= Ns Ar cachename
.Oo Fl c Ar file \*(Ba Xo
.Fl Fl config-file= Ns Ar file
.Xc
.Oc
.Oo Fl g Ar group \*(Ba Xo
.Fl Fl group= Ns Ar group
.Xc
.Oc
.Op Fl Fl max-request= Ns Ar size
.Op Fl Fl disallow-getting-krbtgt
.Op Fl Fl detach
.Op Fl h | Fl Fl help
.Oo Fl k Ar principal \*(Ba Xo
.Fl Fl system-principal= Ns Ar principal
.Xc
.Oc
.Oo Fl l Ar time \*(Ba Xo
.Fl Fl lifetime= Ns Ar time
.Xc
.Oc
.Oo Fl m Ar mode \*(Ba Xo
.Fl Fl mode= Ns Ar mode
.Xc
.Oc
.Op Fl n | Fl Fl no-name-constraints
.Oo Fl r Ar time \*(Ba Xo
.Fl Fl renewable-life= Ns Ar time
.Xc
.Oc
.Oo Fl s Ar path \*(Ba Xo
.Fl Fl socket-path= Ns Ar path
.Xc
.Oc
.Oo Xo
.Fl Fl door-path= Ns Ar path
.Xc
.Oc
.Oo Fl S Ar principal \*(Ba Xo
.Fl Fl server= Ns Ar principal
.Xc
.Oc
.Oo Fl t Ar keytab \*(Ba Xo
.Fl Fl keytab= Ns Ar keytab
.Xc
.Oc
.Oo Fl u Ar user \*(Ba Xo
.Fl Fl user= Ns Ar user
.Xc
.Oc
.Op Fl v | Fl Fl version
.Sh DESCRIPTION
.Nm
is a process based credential cache.
To use it, set the
.Ev KRB5CCNAME
environment variable to
.Ql KCM: Ns Ar uid
or add the stanza
.Bd -literal

[libdefaults]
        default_cc_name = KCM:%{uid}

.Ed
to the
.Pa /etc/krb5.conf
configuration file and make sure
.Nm kcm
is started in the system startup files.
.Pp
The
.Nm
daemon can hold the credentials for all users in the system.  Access
control is done with Unix-like permissions.  The daemon checks the
access on all operations based on the uid and gid of the user.  The
tickets are renewed as long as is permitted by the KDC's policy.
.Pp
The
.Nm
daemon can also keep a SYSTEM credential that server processes can
use to access services.  One example of usage might be an nss_ldap
module that quickly needs to get credentials and doesn't want to renew
the ticket itself.
.Pp
Supported options:
.Bl -tag -width Ds
.It Fl Fl cache-name= Ns Ar cachename
system cache name
.It Fl c Ar file , Fl Fl config-file= Ns Ar file
location of config file
.It Fl g Ar group , Fl Fl group= Ns Ar group
system cache group
.It Fl Fl max-request= Ns Ar size
max size for a kcm-request
.It Fl Fl disallow-getting-krbtgt
disallow extracting any krbtgt from the
.Nm kcm
daemon.
.It Fl Fl detach
detach from console
.It Fl h , Fl Fl help
.It Fl k Ar principal , Fl Fl system-principal= Ns Ar principal
system principal name
.It Fl l Ar time , Fl Fl lifetime= Ns Ar time
lifetime of system tickets
.It Fl m Ar mode , Fl Fl mode= Ns Ar mode
octal mode of system cache
.It Fl n , Fl Fl no-name-constraints
disable credentials cache name constraints
.It Fl r Ar time , Fl Fl renewable-life= Ns Ar time
renewable lifetime of system tickets
.It Fl s Ar path , Fl Fl socket-path= Ns Ar path
path to kcm domain socket
.It Fl Fl door-path= Ns Ar path
path to kcm door socket
.It Fl S Ar principal , Fl Fl server= Ns Ar principal
server to get system ticket for
.It Fl t Ar keytab , Fl Fl keytab= Ns Ar keytab
system keytab name
.It Fl u Ar user , Fl Fl user= Ns Ar user
system cache owner
.It Fl v , Fl Fl version
.El
.\".Sh ENVIRONMENT
.\".Sh FILES
.\".Sh EXAMPLES
.\".Sh DIAGNOSTICS
.\".Sh SEE ALSO
.\".Sh STANDARDS
.\".Sh HISTORY
.\".Sh AUTHORS
.\".Sh BUGS