Linux manual pages Section 3  

Name

fgetgrent — get group file entry

Synopsis

#include <stdio.h>
#include <sys/types.h>
#include <grp.h>
struct group *fgetgrent( FILE *stream);
 
[Note] Note
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.

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 3.24 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/.


  Copyright 1993 David Metcalfe (davidprism.demon.co.uk)

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References consulted:
    Linux libc source code
    Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
    386BSD man pages
Modified Sat Jul 24 19:38:44 1993 by Rik Faith (faithcs.unc.edu)