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You are here: manpages





FGETGRENT

Section: Linux Programmer's Manual (3)
Updated: 2014-08-19
Index Return to Main Contents
 

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;         /* NULL-terminated array of pointers
                               to names of 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 3.81 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
SEE ALSO
COLOPHON


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