From dae4f33e486b80e3d957e35355ca0a63cd90f4bd Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Sun, 2 Nov 2003 21:55:06 +0000
Subject: Additional passwd and group tests

---
 test/pwd_grp/getgroups.c | 108 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 test/pwd_grp/getgroups.c

(limited to 'test/pwd_grp/getgroups.c')

diff --git a/test/pwd_grp/getgroups.c b/test/pwd_grp/getgroups.c
new file mode 100644
index 000000000..ea31b5829
--- /dev/null
+++ b/test/pwd_grp/getgroups.c
@@ -0,0 +1,108 @@
+/* This test was ripped out of GNU 'id' from coreutils-5.0
+ * by Erik Andersen.  
+ *
+ *
+ * id is Copyright (C) 1989-2003 Free Software Foundation, Inc.
+ * and licensed under the GPL v2 or later, and was written by 
+ * Arnold Robbins, with a major rewrite by David MacKenzie,
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <grp.h>
+#include <err.h>
+
+/* The number of errors encountered so far. */
+static int problems = 0;
+
+/* Print the name or value of group ID GID. */
+static void
+print_group (gid_t gid)
+{
+    struct group *grp = NULL;
+
+    grp = getgrgid (gid);
+    if (grp == NULL)
+    {
+	warn("cannot find name for group ID %u", gid);
+	problems++;
+    }
+
+    if (grp == NULL)
+	printf ("%u", (unsigned) gid);
+    else
+	printf ("%s", grp->gr_name);
+}
+
+static int
+xgetgroups (gid_t gid, int *n_groups, gid_t **groups)
+{
+    int max_n_groups;
+    int ng;
+    gid_t *g;
+    int fail = 0;
+
+    max_n_groups = getgroups (0, NULL);
+
+    /* Add 1 just in case max_n_groups is zero.  */
+    g = (gid_t *) malloc (max_n_groups * sizeof (gid_t) + 1);
+    if (g==NULL)
+	err(EXIT_FAILURE, "out of memory");
+    ng = getgroups (max_n_groups, g);
+
+    if (ng < 0)
+    {
+	warn("cannot get supplemental group list");
+	++fail;
+	free (groups);
+    }
+    if (!fail)
+    {
+	*n_groups = ng;
+	*groups = g;
+    }
+    return fail;
+}
+
+/* Print all of the distinct groups the user is in. */
+int main (int argc, char **argv)
+{
+    struct passwd *pwd;
+
+    pwd = getpwuid (getuid());
+    if (pwd == NULL)
+	problems++;
+
+    print_group (getgid());
+    if (getegid() != getgid())
+    {
+	putchar (' ');
+	print_group (getegid());
+    }
+
+    {
+	int n_groups;
+	gid_t *groups;
+	register int i;
+
+	if (xgetgroups ((pwd ? pwd->pw_gid : (gid_t) -1),
+		    &n_groups, &groups))
+	{
+	    return ++problems;
+	}
+
+	for (i = 0; i < n_groups; i++)
+	    if (groups[i] != getgid() && groups[i] != getegid())
+	    {
+		putchar (' ');
+		print_group (groups[i]);
+	    }
+	free (groups);
+    }
+    putchar('\n');
+    return (problems != 0);
+}
+
-- 
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