centos man page for fgetgrent

FGETGRENT(3)						     Linux Programmer's Manual						      FGETGRENT(3)

NAME
       fgetgrent - get group file entry

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

       struct group *fgetgrent(FILE *stream);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       fgetgrent(): _SVID_SOURCE

DESCRIPTION
       The  fgetgrent() function returns a pointer to a structure containing the group information from the file referred to by stream.  The first
       time it is called it returns the first entry; thereafter, it returns successive entries.  The file referred to by stream must have the same
       format as /etc/group (see group(5)).

       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  fgetgrent() function returns a pointer to a group structure, or NULL if there are no more entries or an error occurs.  In the event of
       an error, errno is set to indicate the cause.

ERRORS
       ENOMEM Insufficient memory to allocate group structure.

CONFORMING TO
       SVr4.

SEE ALSO
       endgrent(3), fgetgrent_r(3), fopen(3), getgrent(3), getgrgid(3), getgrnam(3), putgrent(3), setgrent(3), group(5)

COLOPHON
       This page is part of release 3.53 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2013-04-19							      FGETGRENT(3)