logind: implement ACL management

[elogind.git] / src / uaccess.c

diff --git a/src/uaccess.c b/src/uaccess.c
new file mode 100644 (file)
index 0000000..e55ab51
--- /dev/null
+++ b/src/uaccess.c
@@ -0,0 +1,87 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+
+  systemd 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.
+
+  systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <string.h>
+
+#include "logind-acl.h"
+#include "util.h"
+#include "log.h"
+
+int main(int argc, char *argv[]) {
+        int r;
+        const char *path, *seat;
+        char *p, *active_uid = NULL;
+        unsigned long ul;
+
+        log_set_target(LOG_TARGET_AUTO);
+        log_parse_environment();
+        log_open();
+
+        if (argc != 2) {
+                log_error("This program expects two argument.");
+                r = -EINVAL;
+                goto finish;
+        }
+
+        path = argv[1];
+        seat = argv[2];
+
+        p = strappend("/run/systemd/seat/", seat);
+        if (!p) {
+                log_error("Out of memory.");
+                goto finish;
+        }
+
+        r = parse_env_file(p, NEWLINE,
+                           "ACTIVE_UID", &active_uid,
+                           NULL);
+        free(p);
+
+        if (r < 0) {
+                if (errno == ENOENT) {
+                        r = 0;
+                        goto finish;
+                }
+
+                log_error("Failed to read seat data for %s: %s", seat, strerror(-r));
+                goto finish;
+        }
+
+        r = safe_atolu(active_uid, &ul);
+        if (r < 0) {
+                log_error("Failed to parse active UID value %s: %s", active_uid, strerror(-r));
+                goto finish;
+        }
+
+        r = devnode_acl(path, true, false, 0, true, (uid_t) ul);
+        if (r < 0) {
+                log_error("Failed to apply ACL on %s: %s", path, strerror(-r));
+                goto finish;
+        }
+
+        r = 0;
+
+finish:
+        free(active_uid);
+
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}