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authorKay Sievers <kay@vrfy.org>2012-04-09 16:37:54 +0200
committerKay Sievers <kay@vrfy.org>2012-04-09 19:25:41 +0200
commit83cd6b754b270091840456a2c8a66dae19f5a7dc (patch)
treec7088359f9927196a9e64b5b1bfb100733725f47 /src/udev/udev-builtin-uaccess.c
parentf1ff47be175bdcb8ed8512393fee9f9615501e24 (diff)
udev: convert 'uaccess' to a builtin
Diffstat (limited to 'src/udev/udev-builtin-uaccess.c')
-rw-r--r--src/udev/udev-builtin-uaccess.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/src/udev/udev-builtin-uaccess.c b/src/udev/udev-builtin-uaccess.c
new file mode 100644
index 0000000000..662bac9e0b
--- /dev/null
+++ b/src/udev/udev-builtin-uaccess.c
@@ -0,0 +1,99 @@
+/*
+ * manage device node user ACL
+ *
+ * Copyright 2010-2012 Kay Sievers <kay@vrfy.org>
+ * Copyright 2010 Lennart Poettering
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <dirent.h>
+#include <getopt.h>
+
+#include <systemd/sd-daemon.h>
+#include <systemd/sd-login.h>
+#include "logind-acl.h"
+#include "udev.h"
+#include "util.h"
+
+static int builtin_uaccess(struct udev_device *dev, int argc, char *argv[], bool test)
+{
+ int r;
+ const char *path = NULL, *seat;
+ bool changed_acl = false;
+ uid_t uid;
+
+ log_set_target(LOG_TARGET_AUTO);
+ log_parse_environment();
+ log_open();
+
+ umask(0022);
+
+ /* don't muck around with ACLs when the system is not running systemd */
+ if (!sd_booted())
+ return 0;
+
+ path = udev_device_get_devnode(dev);
+ seat = udev_device_get_property_value(dev, "ID_SEAT");
+ if (!seat)
+ seat = "seat0";
+
+ r = sd_seat_get_active(seat, NULL, &uid);
+ if (r == -ENOENT) {
+ /* No active session on this seat */
+ r = 0;
+ goto finish;
+ } else if (r < 0) {
+ log_error("Failed to determine active user on seat %s.", seat);
+ goto finish;
+ }
+
+ r = devnode_acl(path, true, false, 0, true, uid);
+ if (r < 0) {
+ log_error("Failed to apply ACL on %s: %s", path, strerror(-r));
+ goto finish;
+ }
+
+ changed_acl = true;
+ r = 0;
+
+finish:
+ if (path && !changed_acl) {
+ int k;
+
+ /* Better be safe than sorry and reset ACL */
+ k = devnode_acl(path, true, false, 0, false, 0);
+ if (k < 0) {
+ log_error("Failed to apply ACL on %s: %s", path, strerror(-k));
+ if (r >= 0)
+ r = k;
+ }
+ }
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
+const struct udev_builtin udev_builtin_uaccess = {
+ .name = "uaccess",
+ .cmd = builtin_uaccess,
+ .help = "manage device node user ACL",
+};