tree-wide: drop license boilerplate

[thirdparty/systemd.git] / src / rc-local-generator / rc-local-generator.c

diff --git a/src/rc-local-generator/rc-local-generator.c b/src/rc-local-generator/rc-local-generator.c
index 448980ba2da7f2a8da701bac5279ec29d9b6648e..e6122d415e7e86706e1496fddf5ff26ed170f09b 100644 (file)
--- a/src/rc-local-generator/rc-local-generator.c
+++ b/src/rc-local-generator/rc-local-generator.c
@@ -1,23 +1,9 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
 /***
   This file is part of systemd.
 
   Copyright 2010 Lennart Poettering
   Copyright 2011 Michal Schmidt
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 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
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
 #include <errno.h>
@@ -25,63 +11,37 @@
 #include <unistd.h>
 
 #include "log.h"
-#include "util.h"
 #include "mkdir.h"
+#include "string-util.h"
+#include "util.h"
 
-#ifndef RC_LOCAL_SCRIPT_PATH_START
-#define RC_LOCAL_SCRIPT_PATH_START "/etc/rc.d/rc.local"
-#endif
-
-#ifndef RC_LOCAL_SCRIPT_PATH_STOP
-#define RC_LOCAL_SCRIPT_PATH_STOP "/sbin/halt.local"
-#endif
-
-const char *arg_dest = "/tmp";
+static const char *arg_dest = "/tmp";
 
 static int add_symlink(const char *service, const char *where) {
-        char *from = NULL, *to = NULL;
+        const char *from, *to;
         int r;
 
         assert(service);
+        assert(where);
 
-        asprintf(&from, SYSTEM_DATA_UNIT_PATH "/%s", service);
-        asprintf(&to, "%s/%s.wants/%s", arg_dest, where, service);
+        from = strjoina(SYSTEM_DATA_UNIT_PATH "/", service);
+        to = strjoina(arg_dest, "/", where, ".wants/", service);
 
-        if (!from || !to) {
-                r = log_oom();
-                goto finish;
-        }
-
-        mkdir_parents_label(to, 0755);
+        (void) mkdir_parents_label(to, 0755);
 
         r = symlink(from, to);
         if (r < 0) {
                 if (errno == EEXIST)
-                        r = 0;
-                else {
-                        log_error("Failed to create symlink from %s to %s: %m", from, to);
-                        r = -errno;
-                }
-        }
-
-finish:
-        free(from);
-        free(to);
+                        return 0;
 
-        return r;
-}
-
-static bool file_is_executable(const char *f) {
-        struct stat st;
-
-        if (stat(f, &st) < 0)
-                return false;
+                return log_error_errno(errno, "Failed to create symlink %s: %m", to);
+        }
 
-        return S_ISREG(st.st_mode) && (st.st_mode & 0111);
+        return 1;
 }
 
 int main(int argc, char *argv[]) {
-        int r = EXIT_SUCCESS;
+        int ret = EXIT_SUCCESS;
 
         if (argc > 1 && argc != 4) {
                 log_error("This program takes three or no arguments.");
@@ -91,25 +51,26 @@ int main(int argc, char *argv[]) {
         if (argc > 1)
                 arg_dest = argv[1];
 
-        log_set_target(LOG_TARGET_SAFE);
+        log_set_prohibit_ipc(true);
+        log_set_target(LOG_TARGET_AUTO);
         log_parse_environment();
         log_open();
 
         umask(0022);
 
-        if (file_is_executable(RC_LOCAL_SCRIPT_PATH_START)) {
+        if (access(RC_LOCAL_SCRIPT_PATH_START, X_OK) >= 0) {
                 log_debug("Automatically adding rc-local.service.");
 
                 if (add_symlink("rc-local.service", "multi-user.target") < 0)
-                        r = EXIT_FAILURE;
+                        ret = EXIT_FAILURE;
         }
 
-        if (file_is_executable(RC_LOCAL_SCRIPT_PATH_STOP)) {
+        if (access(RC_LOCAL_SCRIPT_PATH_STOP, X_OK) >= 0) {
                 log_debug("Automatically adding halt-local.service.");
 
                 if (add_symlink("halt-local.service", "final.target") < 0)
-                        r = EXIT_FAILURE;
+                        ret = EXIT_FAILURE;
         }
 
-        return r;
+        return ret;
 }