summaryrefslogtreecommitdiffstats
path: root/lib/groupmem.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/groupmem.c')
-rw-r--r--lib/groupmem.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/lib/groupmem.c b/lib/groupmem.c
new file mode 100644
index 0000000..1fd1c13
--- /dev/null
+++ b/lib/groupmem.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 1990 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2001 , Michał Moskal
+ * Copyright (c) 2005 , Tomasz Kłoczko
+ * Copyright (c) 2007 - 2013, Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include "prototypes.h"
+#include "defines.h"
+#include "groupio.h"
+
+/*@null@*/ /*@only@*/struct group *__gr_dup (const struct group *grent)
+{
+ struct group *gr;
+ int i;
+
+ gr = (struct group *) malloc (sizeof *gr);
+ if (NULL == gr) {
+ return NULL;
+ }
+ /* The libc might define other fields. They won't be copied. */
+ memset (gr, 0, sizeof *gr);
+ gr->gr_gid = grent->gr_gid;
+ /*@-mustfreeonly@*/
+ gr->gr_name = strdup (grent->gr_name);
+ /*@=mustfreeonly@*/
+ if (NULL == gr->gr_name) {
+ gr_free(gr);
+ return NULL;
+ }
+ /*@-mustfreeonly@*/
+ gr->gr_passwd = strdup (grent->gr_passwd);
+ /*@=mustfreeonly@*/
+ if (NULL == gr->gr_passwd) {
+ gr_free(gr);
+ return NULL;
+ }
+
+ for (i = 0; grent->gr_mem[i]; i++);
+
+ /*@-mustfreeonly@*/
+ gr->gr_mem = (char **) malloc ((i + 1) * sizeof (char *));
+ /*@=mustfreeonly@*/
+ if (NULL == gr->gr_mem) {
+ gr_free(gr);
+ return NULL;
+ }
+ for (i = 0; grent->gr_mem[i]; i++) {
+ gr->gr_mem[i] = strdup (grent->gr_mem[i]);
+ if (NULL == gr->gr_mem[i]) {
+ gr_free(gr);
+ return NULL;
+ }
+ }
+ gr->gr_mem[i] = NULL;
+
+ return gr;
+}
+
+void gr_free (/*@out@*/ /*@only@*/struct group *grent)
+{
+ free (grent->gr_name);
+ if (NULL != grent->gr_passwd) {
+ memzero (grent->gr_passwd, strlen (grent->gr_passwd));
+ free (grent->gr_passwd);
+ }
+ if (NULL != grent->gr_mem) {
+ size_t i;
+ for (i = 0; NULL != grent->gr_mem[i]; i++) {
+ free (grent->gr_mem[i]);
+ }
+ free (grent->gr_mem);
+ }
+ free (grent);
+}
+