always use the same code for creating temporary files

Let's unify our code here, and also always specifiy O_CLOEXEC.

src/shared/ask-password-api.c

@@ -325,10 +325,7 @@ int ask_password_agent(
 
         mkdir_p_label("/run/systemd/ask-password", 0755);
 
-        RUN_WITH_UMASK(0022) {
-                fd = mkostemp(temp, O_CLOEXEC|O_CREAT|O_WRONLY);
-        }
-
+        fd = mkostemp_safe(temp, O_WRONLY|O_CLOEXEC);
         if (fd < 0) {
                 log_error("Failed to create password file: %m");
                 r = -errno;

src/shared/util.c

@@ -3893,7 +3893,7 @@ int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
         t[k] = '.';
         stpcpy(stpcpy(t+k+1, fn), "XXXXXX");
 
-        fd = mkostemp(t, O_WRONLY|O_CLOEXEC);
+        fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC);
         if (fd < 0) {
                 free(t);
                 return -errno;
@@ -6115,11 +6115,15 @@ int mkostemp_safe(char *pattern, int flags) {
         unsigned long tries = TMP_MAX;
         char *s;
         int r;
+        _cleanup_umask_ mode_t u;
 
         assert(pattern);
 
+        u = umask(077);
+
         /* This is much like like mkostemp() but avoids using any
-         * static variables, thus is async signal safe */
+         * static variables, thus is async signal safe. Also, it's not
+         * subject to umask(). */
 
         s = endswith(pattern, "XXXXXX");
         if (!s)