NAME

       grp.h - group structure

SYNOPSIS

       #include <grp.h>

DESCRIPTION

       The  <grp.h>  header  shall  declare the structure group which shall include the following
       members:

              char   *gr_name The name of the group.
              gid_t   gr_gid  Numerical group ID.
              char  **gr_mem  Pointer to a null-terminated array of character
                              pointers to member names.

       The gid_t type shall be defined as described in <sys/types.h> .

       The following shall be declared as functions and may also be defined as  macros.  Function
       prototypes shall be provided.

              struct group  *getgrgid(gid_t);
              struct group  *getgrnam(const char *);

              int            getgrgid_r(gid_t, struct group *, char *,
                                 size_t, struct group **);
              int            getgrnam_r(const char *, struct group *, char *,
                                 size_t , struct group **);

              struct group  *getgrent(void);
              void           endgrent(void);
              void           setgrent(void);

       The following sections are informative.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       <sys/types.h>   ,  the  System  Interfaces  volume  of  IEEE Std 1003.1-2001,  endgrent(),
       getgrgid(), getgrnam()

COPYRIGHT

       Portions of this text are reprinted and  reproduced  in  electronic  form  from  IEEE  Std
       1003.1,  2003  Edition,  Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE  and  The  Open  Group
       Standard,  the  original  IEEE  and  The  Open Group Standard is the referee document. The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .