summaryrefslogtreecommitdiff
path: root/test/pwd_grp/getgroups.c
diff options
context:
space:
mode:
authorEric Andersen <andersen@codepoet.org>2003-11-02 21:55:06 +0000
committerEric Andersen <andersen@codepoet.org>2003-11-02 21:55:06 +0000
commitdae4f33e486b80e3d957e35355ca0a63cd90f4bd (patch)
treeb4c96edde14b9ae4e3da83d979d3e41c4f894dd6 /test/pwd_grp/getgroups.c
parentded0e9aba41f65618cc4b329cdad753f01f9875a (diff)
Additional passwd and group tests
Diffstat (limited to 'test/pwd_grp/getgroups.c')
-rw-r--r--test/pwd_grp/getgroups.c108
1 files changed, 108 insertions, 0 deletions
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);
+}
+