enddvagent man page on HP-UX

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getdvagent(3)							 getdvagent(3)

       getdvagent(),  getdvagnam(),  setdvagent(), enddvagent(), putdvagnam(),
       copydvagent() - manipulate  device  assignment  database	 entry	for  a
       trusted system

       and  each  return  a  pointer to an object with the following structure
       containing the broken-out fields of an entry in the  Device  Assignment
       database.   Each database entry is returned as a structure, declared in
       the header file:

	      struct dev_field {
		   char	     *fd_name;	      /* external name */
		   char	     **fd_devs;	      /* device list */
		   mask_t    fd_type[1];      /* tape, printer, terminal */
		   char	     **fd_users;      /* authorized user list */
	      /* Device Assignment Database entry */
	      #define AUTH_DEV_TYPE	      "device type"
	      #define AUTH_DEV_PRINTER	      0
	      #define AUTH_DEV_TERMINAL	      1
	      #define AUTH_DEV_TAPE	      2
	      #define AUTH_DEV_REMOTE	      3
	      #define AUTH_MAX_DEV_TYPE	      3
	      #define AUTH_DEV_TYPE_SIZE      (WORD_OF_BIT (AUTH_MAX_DEV_TYPE) + 1)
	      /* this structure tells which of the corresponding fields
	       * in dev_field are valid (filled).
	      struct dev_flag {
		   unsigned short
			fg_name	 : 1,
			fg_devs	 : 1,
			fg_type	 : 1,
			fg_users : 1,
	      struct dev_asg {
		   struct dev_field ufld;
		   struct dev_flag  uflg;
		   struct dev_field sfld;
		   struct dev_flag  sflg;

       The Device Assignment database stores device characteristics  that  are
       related	to  user  authorizations  and synonyms.	 On systems supporting
       network connections, the Device Assignment database stores  information
       about hosts initiating connections.

       Each  entry contains a name, which is a cross reference to the terminal
       control database, and a list of devices, each of which  is  a  pathname
       corresponding  to  that device.	This list allows the device assignment
       software of the trusted system to invalidate all references to a device
       when  re-assigning  it.	The list is a table of character string point‐
       ers, whose last entry is a NULL pointer.

       fd_users is a pointer to a null-terminated table	 of  character	string
       pointers referring to user allowed access.

       For  trusted system versions supporting network connections, the device
       name can be a 12 character host name, where the first 8 characters  are
       the  ASCII  hex	address	 of  the device, and the last 4 characters are
       ASCII zeroes.  For example, a host with Internet address has
       device name 814b00030000.  The trailing four zeroes are for compatibil‐
       ity with ports on terminal concentrators.  The SAM API's supports  con‐
       version	of  host  name to device name.	Thus, sensitivity level ranges
       and user authorization lists can be enforced on hosts  as  well	as  on
       directly connected terminals.

       When  is first called, it returns a pointer to the first device assign‐
       ment entry.  Thereafter, it returns a pointer to	 the  next  entry,  so
       successive calls can be used to search the database.  searches from the
       beginning of the database until an entry with a	device	name  matching
       name  is found, and returns a pointer to that entry.  If an end of file
       or an error is encountered on reading, these functions  return  a  NULL
       pointer.	  copies a device assignment structure and the fields to which
       it refers to a newly-allocated data area.  Since and  re-use  a	static
       structure  when accessing the database, the values of any entry must be
       saved if these routines are used again.	The dev_asg structure returned
       by can be freed using free (see malloc(3C)).

       A call to has the effect of setting the device assignment database back
       to the first entry to allow repeated searches of the  database.	 frees
       all memory and closes all files used to support these routines.

       rewrites	 or adds an entry to the database.  If there is an entry whose
       fd_name field matches the name argument, that entry  is	replaced  with
       the  contents  of  the dv structure.  Otherwise, that entry is added to
       the database.

       Programs using this routine must be compiled with

       In a multithreaded application, these routines are safe	to  be	called
       only from one dedicated thread.	These routines are not POSIX.1c async-
       cancel safe nor async-signal safe.

       and return a pointer to a  static  structure  on	 success,  or  a  NULL
       pointer on failure.  This static structure is overwritten by and

       returns 1 on success, or 0 on failure.

       returns	a  pointer  to	the newly-allocated structure on success, or a
       NULL pointer if there was a memory allocation error.

       The structure returned by this routine contains pointers	 to  character
       strings	and  lists  rather  than  being	 self-contained.  must be used
       instead of structure assignments to save a returned structure.

       The value returned by and refers to a structure that is overwritten  by
       calls  to these routines.  To retrieve an entry, modify it, and replace
       it in the database, copy the entry using and supply the modified buffer

       HP-UX  11i  Version  3  is  the last release to support trusted systems

       Device assignment database


				TO BE OBSOLETED			 getdvagent(3)

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