core/main: use _cleanup_

src/core/load-fragment.c

@@ -1314,7 +1314,7 @@ int config_parse_path_spec(const char *unit,
         Path *p = data;
         PathSpec *s;
         PathType b;
-        char *k;
+        char _cleanup_free_ *k = NULL;
 
         assert(filename);
         assert(lvalue);
@@ -1348,17 +1348,15 @@ int config_parse_path_spec(const char *unit,
         if (!path_is_absolute(k)) {
                 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
                            "Path is not absolute, ignoring: %s", k);
-                free(k);
                 return 0;
         }
 
         s = new0(PathSpec, 1);
-        if (!s) {
-                free(k);
+        if (!s)
                 return log_oom();
-        }
 
         s->path = path_kill_slashes(k);
+        k = NULL;
         s->type = b;
         s->inotify_fd = -1;
 

src/core/main.c

@@ -688,7 +688,8 @@ static int parse_config_file(void) {
 }
 
 static int parse_proc_cmdline(void) {
-        char *line, *w, *state;
+        char _cleanup_free_ *line = NULL;
+        char *w, *state;
         int r;
         size_t l;
 
@@ -697,34 +698,27 @@ static int parse_proc_cmdline(void) {
         if (detect_container(NULL) > 0)
                 return 0;
 
-        if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
+        r = read_one_line_file("/proc/cmdline", &line);
+        if (r < 0) {
                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
                 return 0;
         }
 
         FOREACH_WORD_QUOTED(w, l, line, state) {
-                char *word;
+                char _cleanup_free_ *word;
 
-                if (!(word = strndup(w, l))) {
-                        r = -ENOMEM;
-                        goto finish;
-                }
+                word = strndup(w, l);
+                if (!word)
+                        return log_oom();
 
                 r = parse_proc_cmdline_word(word);
                 if (r < 0) {
                         log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
-                        free(word);
-                        goto finish;
+                        return r;
                 }
-
-                free(word);
         }
 
-        r = 0;
-
-finish:
-        free(line);
-        return r;
+        return 0;
 }
 
 static int parse_argv(int argc, char *argv[]) {

src/shared/log.c

@@ -737,7 +737,9 @@ int log_struct_internal(
                 char header[LINE_MAX];
                 struct iovec iovec[17] = {};
                 unsigned n = 0, i;
-                struct msghdr mh;
+                struct msghdr mh = {
+                        .msg_iov = iovec,
+                };
                 static const char nl = '\n';
 
                 /* If the journal is available do structured logging */
@@ -775,8 +777,6 @@ int log_struct_internal(
                         format = va_arg(ap, char *);
                 }
 
-                zero(mh);
-                mh.msg_iov = iovec;
                 mh.msg_iovlen = n;
 
                 if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0)