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+'\" t
+.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
+.\"
+.\" SPDX-License-Identifier: Linux-man-pages-copyleft
+.\"
+.\" 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 (faith@cs.unc.edu)
+.TH fgetgrent 3 2023-03-30 "Linux man-pages 6.04"
+.SH NAME
+fgetgrent \- get group file entry
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.B #include <stdio.h>
+.B #include <sys/types.h>
+.B #include <grp.h>
+.PP
+.BI "struct group *fgetgrent(FILE *" stream );
+.fi
+.PP
+.RS -4
+Feature Test Macro Requirements for glibc (see
+.BR feature_test_macros (7)):
+.RE
+.PP
+.BR fgetgrent ():
+.nf
+    Since glibc 2.19:
+        _DEFAULT_SOURCE
+    glibc 2.19 and earlier:
+        _SVID_SOURCE
+.fi
+.SH DESCRIPTION
+The
+.BR fgetgrent ()
+function returns a pointer to a structure containing
+the group information from the file referred to by
+.IR stream .
+The first time it is called
+it returns the first entry; thereafter, it returns successive entries.
+The file referred to by
+.I stream
+must have the same format as
+.I /etc/group
+(see
+.BR group (5)).
+.PP
+The \fIgroup\fP structure is defined in \fI<grp.h>\fP as follows:
+.PP
+.in +4n
+.EX
+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 */
+};
+.EE
+.in
+.SH RETURN VALUE
+The
+.BR fgetgrent ()
+function returns a pointer to a
+.I group
+structure,
+or NULL if there are no more entries or an error occurs.
+In the event of an error,
+.I errno
+is set to indicate the error.
+.SH ERRORS
+.TP
+.B ENOMEM
+Insufficient memory to allocate
+.I group
+structure.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.ad l
+.nh
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.BR fgetgrent ()
+T}	Thread safety	MT-Unsafe race:fgetgrent
+.TE
+.hy
+.ad
+.sp 1
+.\" FIXME The marking is different from that in the glibc manual,
+.\" which has:
+.\"
+.\"    fgetgrent: MT-Unsafe race:fgrent
+.\"
+.\" We think race:fgrent in glibc may be hard for users to understand,
+.\" and have sent a patch to the GNU libc community for changing it to
+.\" race:fgetgrent, however, something about the copyright impeded the
+.\" progress.
+.SH STANDARDS
+None.
+.SH HISTORY
+SVr4.
+.SH SEE ALSO
+.BR endgrent (3),
+.BR fgetgrent_r (3),
+.BR fopen (3),
+.BR getgrent (3),
+.BR getgrgid (3),
+.BR getgrnam (3),
+.BR putgrent (3),
+.BR setgrent (3),
+.BR group (5)