+static const char* pid_file_proc(void) {
+ return AVAHI_DAEMON_RUNTIME_DIR"/pid";
+}
+
+static int make_runtime_dir(void) {
+ int r = -1;
+ mode_t u;
+ int reset_umask = 0;
+ struct passwd *pw;
+ struct group * gr;
+ struct stat st;
+
+ if (!(pw = getpwnam(AVAHI_USER))) {
+ avahi_log_error( "Failed to find user '"AVAHI_USER"'.");
+ goto fail;
+ }
+
+ if (!(gr = getgrnam(AVAHI_GROUP))) {
+ avahi_log_error( "Failed to find group '"AVAHI_GROUP"'.");
+ goto fail;
+ }
+
+ u = umask(0000);
+ reset_umask = 1;
+
+ if (mkdir(AVAHI_DAEMON_RUNTIME_DIR, 0755) < 0 && errno != EEXIST) {
+ avahi_log_error("mkdir(\""AVAHI_DAEMON_RUNTIME_DIR"\"): %s", strerror(errno));
+ goto fail;
+ }
+
+ chown(AVAHI_DAEMON_RUNTIME_DIR, pw->pw_uid, gr->gr_gid);
+
+ if (stat(AVAHI_DAEMON_RUNTIME_DIR, &st) < 0) {
+ avahi_log_error("stat(): %s\n", strerror(errno));
+ goto fail;
+ }
+
+ if (!S_ISDIR(st.st_mode) || st.st_uid != pw->pw_uid || st.st_gid != gr->gr_gid) {
+ avahi_log_error("Failed to create runtime directory "AVAHI_DAEMON_RUNTIME_DIR".");
+ goto fail;
+ }
+
+ r = 0;
+
+fail:
+ if (reset_umask)
+ umask(u);
+ return r;
+}
+
+static void set_one_rlimit(int resource, rlim_t limit, const char *name) {
+ struct rlimit rl;
+ rl.rlim_cur = rl.rlim_max = limit;
+
+ if (setrlimit(resource, &rl) < 0)
+ avahi_log_warn("setrlimit(%s, {%u, %u}) failed: %s", name, (unsigned) limit, (unsigned) limit, strerror(errno));
+}
+
+static void enforce_rlimits(void) {
+#ifdef RLIMIT_AS
+ if (config.rlimit_as_set)
+ set_one_rlimit(RLIMIT_AS, config.rlimit_as, "RLIMIT_AS");
+#endif
+ if (config.rlimit_core_set)
+ set_one_rlimit(RLIMIT_CORE, config.rlimit_core, "RLIMIT_CORE");
+ if (config.rlimit_data_set)
+ set_one_rlimit(RLIMIT_DATA, config.rlimit_data, "RLIMIT_DATA");
+ if (config.rlimit_fsize_set)
+ set_one_rlimit(RLIMIT_FSIZE, config.rlimit_fsize, "RLIMIT_FSIZE");
+ if (config.rlimit_nofile_set)
+ set_one_rlimit(RLIMIT_NOFILE, config.rlimit_nofile, "RLIMIT_NOFILE");
+ if (config.rlimit_stack_set)
+ set_one_rlimit(RLIMIT_STACK, config.rlimit_stack, "RLIMIT_STACK");
+#ifdef RLIMIT_NPROC
+ if (config.rlimit_nproc_set)
+ set_one_rlimit(RLIMIT_NPROC, config.rlimit_nproc, "RLIMIT_NPROC");
+#endif
+
+ /* the sysctl() call from iface-pfroute.c needs locked memory on FreeBSD */
+#if defined(RLIMIT_MEMLOCK) && !defined(__FreeBSD__)
+ /* We don't need locked memory */
+ set_one_rlimit(RLIMIT_MEMLOCK, 0, "RLIMIT_MEMLOCK");
+#endif
+}
+
+#define RANDOM_DEVICE "/dev/urandom"
+
+static void init_rand_seed(void) {
+ int fd;
+ unsigned seed = 0;
+
+ /* Try to initialize seed from /dev/urandom, to make it a little
+ * less predictable, and to make sure that multiple machines
+ * booted at the same time choose different random seeds. */
+ if ((fd = open(RANDOM_DEVICE, O_RDONLY)) >= 0) {
+ read(fd, &seed, sizeof(seed));
+ close(fd);
+ }
+
+ /* If the initialization failed by some reason, we add the time to the seed*/
+ seed |= (unsigned) time(NULL);
+
+ srand(seed);
+}
+