getgrent (3)

NAME

       getgrent, setgrent, endgrent - get group file entry

SYNOPSIS

       #include <grp.h>
       #include <sys/types.h>

       struct group *getgrent(void);

       void setgrent(void);

       void endgrent(void);

DESCRIPTION

       The getgrent() function returns a pointer to a structure containing the
       group information from /etc/group.  The first  time  it  is  called  it
       returns the first entry; thereafter, it returns successive entries.

       The  setgrent()  function  rewinds the file pointer to the beginning of
       the /etc/group file.

       The endgrent() function closes the /etc/group file.

       The group structure is defined in <grp.h> as follows:

              struct group {
                      char    *gr_name;        /* group name */
                      char    *gr_passwd;      /* group password */
                      gid_t   gr_gid;          /* group id */
                      char    **gr_mem;        /* group members */
              };

RETURN VALUE

       The getgrent() function returns the  group  information  structure,  or
       NULL if there are no more entries or an error occurs.

ERRORS

       ENOMEM Insufficient memory to allocate group information structure.

FILES

       /etc/group
               group database file

CONFORMING TO

       SVID 3, BSD 4.3

SEE ALSO

       fgetgrent(3), getgrnam(3), getgrgid(3)

GNU                               1993-04-04                       getgrent(3)