umask: set umask of a number of sockets by default, even though we check creds on connections

TODO

@@ -19,6 +19,9 @@ Bugfixes:
 
 Features:
 
+* allow Type=simple with PIDFile=
+  https://bugzilla.redhat.com/show_bug.cgi?id=723942
+
 * generator dir is 666?
 
 * set access mode of /run/systemd/{private,notify} to 666, not 777

src/ask-password-api.c

@@ -250,6 +250,7 @@ static int create_socket(char **name) {
         } sa;
         int one = 1, r;
         char *c;
+        mode_t u;
 
         assert(name);
 
@@ -262,7 +263,11 @@ static int create_socket(char **name) {
         sa.un.sun_family = AF_UNIX;
         snprintf(sa.un.sun_path, sizeof(sa.un.sun_path)-1, "/run/systemd/ask-password/sck.%llu", random_ull());
 
-        if (bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
+        u = umask(0177);
+        r = bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path));
+        umask(u);
+
+        if (r < 0) {
                 r = -errno;
                 log_error("bind() failed: %m");
                 goto fail;
@@ -310,6 +315,7 @@ int ask_password_agent(
         int socket_fd = -1, signal_fd = -1;
         sigset_t mask, oldmask;
         struct pollfd pollfd[_FD_MAX];
+        mode_t u;
 
         assert(_passphrases);
 
@@ -319,7 +325,11 @@ int ask_password_agent(
 
         mkdir_p("/run/systemd/ask-password", 0755);
 
-        if ((fd = mkostemp(temp, O_CLOEXEC|O_CREAT|O_WRONLY)) < 0) {
+        u = umask(0022);
+        fd = mkostemp(temp, O_CLOEXEC|O_CREAT|O_WRONLY);
+        umask(u);
+
+        if (fd < 0) {
                 log_error("Failed to create password file: %m");
                 r = -errno;
                 goto finish;

src/manager.c

@@ -76,7 +76,8 @@ static int manager_setup_notify(Manager *m) {
                 struct sockaddr_un un;
         } sa;
         struct epoll_event ev;
-        int one = 1;
+        int one = 1, r;
+        mode_t u;
 
         assert(m);
 
@@ -99,7 +100,11 @@ static int manager_setup_notify(Manager *m) {
         if (sa.un.sun_path[0] == '@')
                 sa.un.sun_path[0] = 0;
 
-        if (bind(m->notify_watch.fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
+        u = umask(0111);
+        r = bind(m->notify_watch.fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
+        umask(u);
+
+        if (r < 0) {
                 log_error("bind() failed: %m");
                 return -errno;
         }

units/systemd-shutdownd.socket

@@ -14,3 +14,4 @@ Before=sockets.target
 
 [Socket]
 ListenDatagram=/run/systemd/shutdownd
+SocketMode=0600