getgrent man page on Ultrix

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getgrent(3)							   getgrent(3)

       getgrent, getgrgid, getgrnam, setgrent, endgrent - get group entry

       #include <grp.h>

       struct group *getgrent()

       struct group *getgrgid(gid)
       gid_t gid;

       struct group *getgrnam(name)
       char *name;

       void setgrent()

       void endgrent()

       The  and subroutines each return pointers to an object with the follow‐
       ing structure containing the broken-out fields of a line in  the	 group

       struct  group { /* see getgrent(3) */
	       char    *gr_name;
	       char    *gr_passwd;
	       int     gr_gid;
	       char    **gr_mem;

       struct group *getgrent(), *getgrgid(), *getgrnam();

       The members of this structure are:

       gr_name	  The name of the group.
       gr_passwd  The encrypted password of the group.
       gr_gid	  The numerical group-ID.
       gr_mem	  Null-terminated  vector of pointers to the individual member

       A call to has the effect of rewinding the group file to allow  repeated
       searches.   The may be called to close the group database when process‐
       ing is complete.

       The subroutine simply reads the next line  while	 and  search  until  a
       matching	 gid or name is found (or until EOF is encountered).  The sub‐
       routine keeps a pointer in the database, allowing successive  calls  to
       be used to search the entire file.

       A call to must be made before a loop using in order to perform initial‐
       ization and an must be used after the loop.  Both and make calls to and

       All information is contained in a static area so it must be  copied  if
       it is to be saved.

       If  YP is running, does not return the entries in any particular order.
       See the Guide to the Yellow Pages Service for setup information.

       The group database may also be distributed via the  BIND/Hesiod	naming
       service.	  See  the  Guide to the BIND/Hesiod Service for more informa‐

Return Values
       A null pointer (0) is returned on EOF or error.

See Also
       group(5), svc.conf(5)
       Guide to the BIND/Hesiod Service
       Guide to the Yellow Pages Service


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