tf_util man page on 4.4BSD

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TF_UTIL(3)							    TF_UTIL(3)

NAME
       tf_init,	 tf_get_pname,	tf_get_pinst, tf_get_cred, tf_close - routines
       for manipulating a Kerberos ticket file

SYNOPSIS
       #include <kerberosIV/krb.h>

       extern char *krb_err_txt[];

       tf_init(tf_name, rw)
       char *tf_name;
       int rw;

       tf_get_pname(pname)
       char *pname;

       tf_get_pinst(pinst)
       char *pinst;

       tf_get_cred(c)
       CREDENTIALS *c;

       tf_close()

DESCRIPTION
       This group of routines are provided to manipulate the Kerberos  tickets
       file.  A ticket file has the following format:

	   principal's name	     (null-terminated string)
	   principal's instance	     (null-terminated string)
	   CREDENTIAL_1
	   CREDENTIAL_2
	     ...
	   CREDENTIAL_n
	   EOF

       Where "CREDENTIAL_x" consists of the following fixed-length
       fields from the CREDENTIALS structure (defined in <kerberosIV/krb.h>):

		char	  service[ANAME_SZ]
		char	  instance[INST_SZ]
		char	  realm[REALM_SZ]
		des_cblock     session
		int	  lifetime
		int	  kvno
		KTEXT_ST  ticket_st
		long	  issue_date

       tf_init must be called before the other ticket file routines.  It takes
       the name of the ticket file to use, and a read/write flag as arguments.
       It  tries to open the ticket file, checks the mode and if everything is
       okay, locks the file.  If it's opened for reading, the lock is  shared.
       If  it's	 opened	 for  writing,	the  lock  is  exclusive.  KSUCCESS is
       returned if all went well, otherwise one of the following:

       NO_TKT_FIL     - file wasn't there
       TKT_FIL_ACC    - file was in wrong mode, etc.
       TKT_FIL_LCK    - couldn't lock the file, even after a retry

       The tf_get_pname reads the principal's name from	 a  ticket  file.   It
       should  only  be called after tf_init has been called.  The principal's
       name is filled into the pname parameter.	 If all goes well, KSUCCESS is
       returned.   If  tf_init wasn't called, TKT_FIL_INI is returned.	If the
       principal's name was null, or EOF was  encountered,  or	the  name  was
       longer than ANAME_SZ, TKT_FIL_FMT is returned.

       The tf_get_pinst reads the principal's instance from a ticket file.  It
       should only be called after tf_init and tf_get_pname have been  called.
       The  principal's	 instance  is filled into the pinst parameter.	If all
       goes well, KSUCCESS is returned.	 If tf_init wasn't called, TKT_FIL_INI
       is  returned.   If  EOF	was  encountered,  or the name was longer than
       INST_SZ, TKT_FIL_FMT is returned.   Note	 that,	unlike	the  principal
       name, the instance name may be null.

       The  tf_get_cred	 routine reads a CREDENTIALS record from a ticket file
       and fills in the given structure.   It  should  only  be	 called	 after
       tf_init,	 tf_get_pname, and tf_get_pinst have been called.  If all goes
       well, KSUCCESS is returned.  Possible error codes are:

       TKT_FIL_INI    - tf_init wasn't called first
       TKT_FIL_FMT    - bad format
       EOF	 - end of file encountered

       tf_close closes the ticket file and releases the lock on it.

SEE ALSO
       krb(3)

DIAGNOSTICS
BUGS
       The ticket file routines have to be called in a certain order.

AUTHORS
       Jennifer Steiner, MIT Project Athena
       Bill Bryant, MIT Project Athena

RESTRICTIONS
       Copyright 1987 Massachusetts Institute of Technology

MIT Project Athena	     Kerberos Version 4.0		    TF_UTIL(3)
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