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-rw-r--r--grp/getgrgid.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/grp/getgrgid.c b/grp/getgrgid.c
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--- /dev/null
+++ b/grp/getgrgid.c
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+/* Copyright (C) 1991 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., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <grp.h>
+
+/* Search for an entry with a matching group ID. */
+struct group *
+DEFUN(getgrgid, (gid), register gid_t gid)
+{
+ static PTR info = NULL;
+ register FILE *stream;
+ register struct group *g;
+
+ if (info == NULL)
+ {
+ info = __grpalloc();
+ if (info == NULL)
+ return NULL;
+ }
+
+ stream = __grpopen();
+ if (stream == NULL)
+ return NULL;
+
+ while ((g = __grpread(stream, info)) != NULL)
+ if (g->gr_gid == (gid_t) gid)
+ break;
+
+ (void) fclose(stream);
+ return g;
+}