getgrent.3, getgrent_r.3, getgrnam.3: Refer reader for group(5) for more ino on group structure

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/getgrent.3

@@ -25,7 +25,7 @@
 .\"     Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
 .\"     386BSD man pages
 .\" Modified Sat Jul 24 19:29:54 1993 by Rik Faith (faith@cs.unc.edu)
-.TH GETGRENT 3  2010-09-20 "" "Linux Programmer's Manual"
+.TH GETGRENT 3  2010-10-21 "" "Linux Programmer's Manual"
 .SH NAME
 getgrent, setgrent, endgrent \- get group file entry
 .SH SYNOPSIS
@@ -98,6 +98,9 @@ struct group {
 };
 .fi
 .in
+.PP
+For more information about the fields of this structure, see
+.BR group (5).
 .SH "RETURN VALUE"
 The
 .BR getgrent ()
@@ -155,4 +158,5 @@ SVr4, 4.3BSD, POSIX.1-2001.
 .BR getgrgid (3),
 .BR getgrnam (3),
 .BR getgrouplist (3),
-.BR putgrent (3)
+.BR putgrent (3),
+.BR group (5)

man3/getgrent_r.3

@@ -20,7 +20,7 @@
 .\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
 .\" USA.
 .\"
-.TH GETGRENT_R 3 2007-07-26 "GNU" "Linux Programmer's Manual"
+.TH GETGRENT_R 3 2010-10-21 "GNU" "Linux Programmer's Manual"
 .SH NAME
 getgrent_r, fgetgrent_r \- get group file entry reentrantly
 .SH SYNOPSIS
@@ -75,7 +75,10 @@ struct group {
 };
 .fi
 .in
-.sp
+.PP
+For more information about the fields of this structure, see
+.BR group (5).
+.PP
 The nonreentrant functions return a pointer to static storage,
 where this static storage contains further pointers to group
 name, password and members.

man3/getgrnam.3

@@ -28,7 +28,7 @@
 .\" Modified 1993-07-24 by Rik Faith (faith@cs.unc.edu)
 .\" Modified 2003-11-15 by aeb
 .\"
-.TH GETGRNAM 3 2009-03-30 "" "Linux Programmer's Manual"
+.TH GETGRNAM 3 2010-10-21 "" "Linux Programmer's Manual"
 .SH NAME
 getgrnam, getgrnam_r, getgrgid, getgrgid_r \- get group file entry
 .SH SYNOPSIS
@@ -80,26 +80,6 @@ the broken-out fields of the record in the group database
 that matches the group ID
 .IR gid .
 .PP
-The
-.BR getgrnam_r ()
-and
-.BR getgrgid_r ()
-functions obtain the same information, but store the retrieved
-.I group
-structure
-in the space pointed to by
-.IR grp .
-This
-.I group
-structure contains pointers to strings, and these strings
-are stored in the buffer
-.I buf
-of size
-.IR buflen .
-A pointer to the result (in case of success) or NULL (in case no entry
-was found or an error occurred) is stored in
-.IR *result .
-.PP
 The \fIgroup\fP structure is defined in \fI<grp.h>\fP as follows:
 .sp
 .in +4n
@@ -113,6 +93,32 @@ struct group {
 .fi
 .in
 .PP
+For more information about the fields of this structure, see
+.BR group (5).
+.PP
+The
+.BR getgrnam_r ()
+and
+.BR getgrgid_r ()
+functions obtain the same information as
+.BR getgrnam ()
+and
+.BR getgrgid (),
+but store the retrieved
+.I group
+structure
+in the space pointed to by
+.IR grp .
+The string fields pointed to by the members of the
+.I group
+structure are stored in the buffer
+.I buf
+of size
+.IR buflen .
+A pointer to the result (in case of success) or NULL (in case no entry
+was found or an error occurred) is stored in
+.IR *result .
+.PP
 The maximum needed size for
 .I buf
 can be found using