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-rw-r--r--grp/Makefile2
-rw-r--r--grp/Versions4
-rw-r--r--grp/grp.h22
-rw-r--r--grp/putgrent.c70
4 files changed, 80 insertions, 18 deletions
diff --git a/grp/Makefile b/grp/Makefile
index ac889218c1..0d13495bd8 100644
--- a/grp/Makefile
+++ b/grp/Makefile
@@ -23,7 +23,7 @@ subdir	:= grp
 headers := grp.h
 
 routines := fgetgrent initgroups setgroups \
-	    getgrent getgrgid getgrnam \
+	    getgrent getgrgid getgrnam putgrent \
 	    getgrent_r getgrgid_r getgrnam_r fgetgrent_r
 
 tests := testgrp
diff --git a/grp/Versions b/grp/Versions
index 1e13e5574c..1615b24186 100644
--- a/grp/Versions
+++ b/grp/Versions
@@ -16,4 +16,8 @@ libc {
     # s*
     setgrent; setgroups;
   }
+  GLIBC_2.1 {
+    # p*
+    putgrent;
+  }
 }
diff --git a/grp/grp.h b/grp/grp.h
index 265f3c2003..7e73625741 100644
--- a/grp/grp.h
+++ b/grp/grp.h
@@ -54,23 +54,6 @@ struct group
 # include <stdio.h>
 #endif
 
-#ifdef	__USE_GNU
-/* Return a new stream open on the group file.  */
-extern FILE *__grpopen __P ((void));
-
-/* Read a group entry from STREAM, filling in G.
-   Return the `struct group' of G if successful, NULL on failure.  */
-extern struct group *__grpread __P ((FILE *__stream, __ptr_t __g));
-
-/* Return a chunk of memory containing pre-initialized data for __grpread.  */
-extern __ptr_t __grpalloc __P ((void));
-
-/* Scan the group file, filling in G, until SELECTOR returns nonzero for an
-   entry.  Return the `struct group' of G if successful, NULL on failure.  */
-extern struct group *__grpscan __P ((__ptr_t *__p,
-				     int (*__selector) (struct group *)));
-#endif
-
 
 #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 /* Rewind the group-file stream.  */
@@ -88,6 +71,11 @@ extern struct group *getgrent __P ((void));
 extern struct group *fgetgrent __P ((FILE *__stream));
 #endif
 
+#ifdef __USE_GNU
+/* Write the given entry onto the given stream.  */
+extern int putgrent __P ((__const struct group *__p, FILE *__f));
+#endif
+
 /* Search for an entry with a matching group ID.  */
 extern struct group *getgrgid __P ((__gid_t __gid));
 
diff --git a/grp/putgrent.c b/grp/putgrent.c
new file mode 100644
index 0000000000..7d7732a9c8
--- /dev/null
+++ b/grp/putgrent.c
@@ -0,0 +1,70 @@
+/* Copyright (C) 1991, 1992, 1996, 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <grp.h>
+
+#ifdef USE_IN_LIBIO
+# define flockfile(s) _IO_flockfile (s)
+# define funlockfile(s) _IO_funlockfile (s)
+#endif
+
+#define _S(x)	x ? x : ""
+
+/* Write an entry to the given stream.
+   This must know the format of the group file.  */
+int
+putgrent (gr, stream)
+     const struct group *gr;
+     FILE *stream;
+{
+  int retval;
+
+  if (gr == NULL || stream == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  flockfile (stream);
+
+  retval = fprintf (stream, "%s:%s:%u:",
+		    gr->gr_name, _S (gr->gr_passwd), gr->gr_gid);
+  if (retval < 0)
+    return -1;
+
+  if (gr->gr_mem != NULL)
+    {
+      int i;
+
+      for (i = 0 ; gr->gr_mem[i] != NULL; i++)
+	if (fprintf (stream, "%c%s", i == 0 ? ':' : ',', gr->gr_mem[i]) < 0)
+	  {
+	    /* What else can we do?  */
+	    funlockfile (stream);
+	    return -1;
+	  }
+    }
+
+  retval = fputc_unlocked ('\n', stream);
+
+  funlockfile (stream);
+
+  return retval < 0 ? -1 : 0;
+}