Kernel Functions for Drivers                         ddicred(9F)



NAME
     ddicred,   crgetuid,   crgetruid,   crgetsuid,    crgetgid,
     crgetrgid, crgetsgid, crgetzoneid, crgetgroups, crgetngroups
     - access and change parts of the credt structure

SYNOPSIS
     #include 



     uidt crgetuid(const credt *cr);


     uidt crgetruid(const credt *cr);


     uidt crgetsuid(const credt *cr);


     gidt crgetgid(const credt *cr);


     gidt crgetrgid(const credt *cr);


     gidt crgetsgid(const credt *cr);


     zoneidt crgetzoneid(const credt *cr);


     const gidt *crgetgroups(const credt *cr);


     int crgetngroups(const credt *cr);


     int crsetresuid(credt *cr, uidt ruid, uidt euid, uidt suid);


     int crsetresgid(credt *cr, gidt rgid, gidt egid, gidt sgid);


     int crsetugid(credt *cr, uidt uid, gidt gid);


     int crsetgroups(credt *cr, int ngroups, gidt gids);


INTERFACE LEVEL
     Solaris DI specific (Solaris DI).




SunOS 5.11           Last change: 6 Aug 2003                    1






Kernel Functions for Drivers                         ddicred(9F)



PARAMETERS
     cr                       pointer  to  the  user   credential
                              structure


     uid, ruid, euid, suid    new user id,  real,  effective  and
                              saved user id


     gid, rgid, egid, sgid    new group id, real,  effective  and
                              saved group id


     ngroups                  number of groups in the group array


     gids                     pointer to array of new groups


DESCRIPTION
     The user credential is a shared, read-only, ref-counted data
     structure. Its actual size and layout are subject to change.
     The functions described in this page allow the programmer to
     retrieve  fields  from the structure and to initialize newly
     allocated credential structures.


     crgetuid(), crgetruid(),  and  crgetsuid()  return,  respec-
     tively, the effective, real, and saved user id from the user
     credential pointed to by cr.


     crgetgid(), crgetrgid(),  and  crgetsgid()  return,  respec-
     tively,  the  effective,  real,  and saved group id from the
     user credential pointed to by cr.


     crgetzoneid() returns the zone id from the  user  credential
     pointed to by cr.


     crgetgroups() returns the group list of the user  credential
     pointed to by cr.


     crgetngroups() returns the number  of  groups  in  the  user
     credential pointed to by cr.


     crsetresuid() sets the real, effective and  saved  user  id.
     All  but one can be specified as -1, which causes the origi-
     nal value not to change.



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Kernel Functions for Drivers                         ddicred(9F)



     crsetresgid() sets the real, effective and saved  group  id.
     All  but one can be specified as -1, which causes the origi-
     nal value not to change.


     crsetugid() initializes the real, effective and  saved  user
     id all to uid. It initializes the real, effective, and saved
     group id all to gid.


     crsetgroups() sets the number of groups in the user  creden-
     tial  to ngroups and copies the groups from gids to the user
     credential. If ngroups is 0, gids need not  point  to  valid
     storage.


     It is an error to call this any of the crset*() functions on
     a user credential structure that was newly allocated.

RETURN VALUES
     The crget*() functions return the requested information.


     The crset*id() functions return 0 on success and -1  if  any
     of  the specified ids are invalid. The functions might cause
     a system panic if called on a user credential structure that
     is referenced by other parts of the system.

CONTEXT
     These functions can be called from user and kernel contexts.

ATRIBUTES
     See attributes(5) for a description of the following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Architecture                 All                         
    
     Interface Stability          Committed                   
    


SEE ALSO
     attributes(5), privileges(5), drvpriv(9F)


     Writing Device Drivers




SunOS 5.11           Last change: 6 Aug 2003                    3