tree-wide: update empty-if coccinelle script to cover empty-while and more

Let's also clean up single-line while and for blocks.

coccinelle/empty-if.cocci

@@ -1,19 +1,56 @@
 @@
-expression e, f;
+expression e, f, g, h, i, j;
 statement s, t;
 @@
 (
 if (e) {
-if (f) s
+(
+if (h) s
+|
+if (h) s else t
+|
+while (h) s
+|
+for (h; i; j) s
+)
 }
 |
-if (e) {
+while (e) {
-if (f) s
+(
-else t
+if (h) s
+|
+if (h) s else t
+|
+while (h) s
+|
+for (h; i; j) s
+)
+}
+|
+for (e; f; g) {
+(
+if (h) s
+|
+if (h) s else t
+|
+while (h) s
+|
+for (h; i; j) s
+)
 }
 |
 - if (e) {
 + if (e)
 s
 - }
+|
+- while (e) {
++ while (e)
+s
+- }
+|
+- for (e; f; g) {
++ for (e; f; g)
+s
+- }
 )

src/boot/efi/graphics.c

@@ -67,10 +67,9 @@ EFI_STATUS graphics_mode(BOOLEAN on) {
         EFI_STATUS err;
 
         err = LibLocateProtocol(&ConsoleControlProtocolGuid, (VOID **)&ConsoleControl);
-        if (EFI_ERROR(err)) {
+        if (EFI_ERROR(err))
                 /* console control protocol is nonstandard and might not exist. */
                 return err == EFI_NOT_FOUND ? EFI_SUCCESS : err;
-        }
 
         /* check current mode */
         err = uefi_call_wrapper(ConsoleControl->GetMode, 4, ConsoleControl, &current, &uga_exists, &stdin_locked);

src/bootchart/bootchart.c

@@ -338,10 +338,9 @@ int main(int argc, char *argv[]) {
          * - child logs data
          */
         if (getpid() == 1) {
-                if (fork()) {
+                if (fork())
                         /* parent */
                         execl(arg_init_path, arg_init_path, NULL);
-                }
         }
         argv[0][0] = '@';
 

src/core/execute.c

@@ -1998,9 +1998,8 @@ void exec_context_done(ExecContext *c) {
         strv_free(c->environment_files);
         c->environment_files = NULL;
 
-        for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
+        for (l = 0; l < ELEMENTSOF(c->rlimit); l++)
                 c->rlimit[l] = mfree(c->rlimit[l]);
-        }
 
         c->working_directory = mfree(c->working_directory);
         c->root_directory = mfree(c->root_directory);

src/core/main.c

@@ -1841,9 +1841,8 @@ finish:
                 arg_shutdown_watchdog = m->shutdown_watchdog;
         m = manager_free(m);
 
-        for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
+        for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++)
                 arg_default_rlimit[j] = mfree(arg_default_rlimit[j]);
-        }
 
         arg_default_unit = mfree(arg_default_unit);
 

src/core/namespace.c

@@ -555,10 +555,9 @@ int setup_namespace(
         /* Remount / as the desired mode. Not that this will not
          * reestablish propagation from our side to the host, since
          * what's disconnected is disconnected. */
-        if (mount(NULL, "/", NULL, mount_flags | MS_REC, NULL) < 0) {
+        if (mount(NULL, "/", NULL, mount_flags | MS_REC, NULL) < 0)
                 /* at this point, we cannot rollback */
                 return -errno;
-        }
 
         return 0;
 

src/core/service.c

@@ -2937,14 +2937,11 @@ static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds)
         }
 
         /* Interpret WATCHDOG= */
-        if (strv_find(tags, "WATCHDOG=1")) {
+        if (strv_find(tags, "WATCHDOG=1"))
                 service_reset_watchdog(s);
-        }
 
-        /* Add the passed fds to the fd store */
+        if (strv_find(tags, "FDSTORE=1"))
-        if (strv_find(tags, "FDSTORE=1")) {
                 service_add_fd_store_set(s, fds);
-        }
 
         /* Notify clients about changed status or main pid */
         if (notify_dbus)

src/debug-generator/debug-generator.c

@@ -95,11 +95,10 @@ static int generate_mask_symlinks(void) {
                 if (!p)
                         return log_oom();
 
-                if (symlink("/dev/null", p) < 0) {
+                if (symlink("/dev/null", p) < 0)
                         r = log_error_errno(errno,
                                             "Failed to create mask symlink %s: %m",
                                             p);
-                }
         }
 
         return r;
@@ -125,11 +124,10 @@ static int generate_wants_symlinks(void) {
 
                 mkdir_parents_label(p, 0755);
 
-                if (symlink(f, p) < 0) {
+                if (symlink(f, p) < 0)
                         r = log_error_errno(errno,
                                             "Failed to create wants symlink %s: %m",
                                             p);
-                }
         }
 
         return r;

src/hostname/hostnamed.c

@@ -63,9 +63,8 @@ static void context_reset(Context *c) {
 
         assert(c);
 
-        for (p = 0; p < _PROP_MAX; p++) {
+        for (p = 0; p < _PROP_MAX; p++)
                 c->data[p] = mfree(c->data[p]);
-        }
 }
 
 static void context_free(Context *c) {

src/journal-remote/journal-remote.c

@@ -614,10 +614,9 @@ static int request_handler(
                         return code;
         } else {
                 r = getnameinfo_pretty(fd, &hostname);
-                if (r < 0) {
+                if (r < 0)
                         return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR,
                                            "Cannot check remote hostname");
-                }
         }
 
         assert(hostname);

src/journal/journald-native.c

@@ -184,6 +184,7 @@ void server_process_native_message(
                                                 free(identifier);
                                                 identifier = t;
                                         }
+
                                 } else if (l >= 8 &&
                                            startswith(p, "MESSAGE=")) {
                                         char *t;
@@ -193,6 +194,7 @@ void server_process_native_message(
                                                 free(message);
                                                 message = t;
                                         }
+
                                 } else if (l > strlen("OBJECT_PID=") &&
                                            l < strlen("OBJECT_PID=")  + DECIMAL_STR_MAX(pid_t) &&
                                            startswith(p, "OBJECT_PID=") &&

src/libsystemd/sd-netlink/netlink-message.c

@@ -892,9 +892,8 @@ int sd_netlink_message_rewind(sd_netlink_message *m) {
         if (!m->sealed)
                 rtnl_message_seal(m);
 
-        for (i = 1; i <= m->n_containers; i++) {
+        for (i = 1; i <= m->n_containers; i++)
                 m->containers[i].attributes = mfree(m->containers[i].attributes);
-        }
 
         m->n_containers = 0;
 

src/shared/pty.c

@@ -311,9 +311,8 @@ static int pty_dispatch_read(Pty *pty) {
                                 continue;
 
                         return (errno == EAGAIN) ? 0 : -errno;
-                } else if (len == 0) {
+                } else if (len == 0)
                         continue;
-                }
 
                 /* set terminating zero for debugging safety */
                 pty->in_buf[len] = 0;
@@ -356,9 +355,8 @@ static int pty_dispatch_write(Pty *pty) {
                                 continue;
 
                         return (errno == EAGAIN) ? 1 : -errno;
-                } else if (len == 0) {
+                } else if (len == 0)
                         continue;
-                }
 
                 ring_pull(&pty->out_buf, (size_t)len);
         }

src/test/test-ratelimit.c

@@ -27,19 +27,16 @@ static void test_ratelimit_test(void) {
         int i;
         RATELIMIT_DEFINE(ratelimit, 1 * USEC_PER_SEC, 10);
 
-        for (i = 0; i < 10; i++) {
+        for (i = 0; i < 10; i++)
                 assert_se(ratelimit_test(&ratelimit));
-        }
         assert_se(!ratelimit_test(&ratelimit));
         sleep(1);
-        for (i = 0; i < 10; i++) {
+        for (i = 0; i < 10; i++)
                 assert_se(ratelimit_test(&ratelimit));
-        }
 
         RATELIMIT_INIT(ratelimit, 0, 10);
-        for (i = 0; i < 10000; i++) {
+        for (i = 0; i < 10000; i++)
                 assert_se(ratelimit_test(&ratelimit));
-        }
 }
 
 int main(int argc, char *argv[]) {

src/udev/cdrom_id/cdrom_id.c

@@ -565,9 +565,8 @@ static int cd_profiles(struct udev *udev, int fd)
         if (len > sizeof(features)) {
                 log_debug("can not get features in a single query, truncating");
                 len = sizeof(features);
-        } else if (len <= 8) {
+        } else if (len <= 8)
                 len = sizeof(features);
-        }
 
         /* Now get the full feature buffer */
         scsi_cmd_init(udev, &sc);

src/udev/scsi_id/scsi_id.c

@@ -279,9 +279,9 @@ static int get_file_options(struct udev *udev,
                         strcpy(buffer, options_in);
                         c = argc_count(buffer) + 2;
                         *newargv = calloc(c, sizeof(**newargv));
-                        if (!*newargv) {
+                        if (!*newargv)
                                 retval = log_oom();
-                        } else {
+                        else {
                                 *argc = c;
                                 c = 0;
                                 /*
@@ -537,16 +537,13 @@ static int scsi_id(struct udev *udev, char *maj_min_dev)
                         if (dev_scsi.wwn_vendor_extension[0] != '\0') {
                                 printf("ID_WWN_VENDOR_EXTENSION=0x%s\n", dev_scsi.wwn_vendor_extension);
                                 printf("ID_WWN_WITH_EXTENSION=0x%s%s\n", dev_scsi.wwn, dev_scsi.wwn_vendor_extension);
-                        } else {
+                        } else
                                 printf("ID_WWN_WITH_EXTENSION=0x%s\n", dev_scsi.wwn);
-                        }
                 }
-                if (dev_scsi.tgpt_group[0] != '\0') {
+                if (dev_scsi.tgpt_group[0] != '\0')
                         printf("ID_TARGET_PORT=%s\n", dev_scsi.tgpt_group);
-                }
+                if (dev_scsi.unit_serial_number[0] != '\0')
-                if (dev_scsi.unit_serial_number[0] != '\0') {
                         printf("ID_SCSI_SERIAL=%s\n", dev_scsi.unit_serial_number);
-                }
                 goto out;
         }
 

src/udev/scsi_id/scsi_serial.c

@@ -135,9 +135,8 @@ static int sg_err_category_new(struct udev *udev,
                                         return SG_ERR_CAT_MEDIA_CHANGED;
                                 if (0x29 == asc)
                                         return SG_ERR_CAT_RESET;
-                        } else if (sense_key == ILLEGAL_REQUEST) {
+                        } else if (sense_key == ILLEGAL_REQUEST)
                                 return SG_ERR_CAT_NOTSUPPORTED;
-                        }
                 }
                 return SG_ERR_CAT_SENSE;
         }
@@ -490,9 +489,8 @@ static int check_fill_0x83_id(struct udev *udev,
         if ((page_83[1] & 0x30) == 0x10) {
                 if (id_search->id_type != SCSI_ID_TGTGROUP)
                         return 1;
-        } else if ((page_83[1] & 0x30) != 0) {
+        } else if ((page_83[1] & 0x30) != 0)
                 return 1;
-        }
 
         if ((page_83[1] & 0x0f) != id_search->id_type)
                 return 1;

src/udev/udev-builtin-keyboard.c

@@ -255,9 +255,8 @@ static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], boo
                         }
 
                         override_abs(fd, node, evcode, udev_list_entry_get_value(entry));
-                } else if (streq(key, "POINTINGSTICK_SENSITIVITY")) {
+                } else if (streq(key, "POINTINGSTICK_SENSITIVITY"))
                         set_trackpoint_sensitivity(dev, udev_list_entry_get_value(entry));
-                }
         }
 
         /* install list of force-release codes */

src/udev/udev-rules.c

@@ -1428,9 +1428,9 @@ static int add_rule(struct udev_rules *rules, char *line,
                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
                                 uid = add_uid(rules, value);
                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
-                        } else if (rules->resolve_names >= 0) {
+                        } else if (rules->resolve_names >= 0)
                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
-                        }
+
                         rule_tmp.rule.rule.can_set_name = true;
                         continue;
                 }
@@ -1450,9 +1450,9 @@ static int add_rule(struct udev_rules *rules, char *line,
                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
                                 gid = add_gid(rules, value);
                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
-                        } else if (rules->resolve_names >= 0) {
+                        } else if (rules->resolve_names >= 0)
                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
-                        }
+
                         rule_tmp.rule.rule.can_set_name = true;
                         continue;
                 }

src/udev/udev-watch.c

@@ -83,9 +83,8 @@ unlink:
                 closedir(dir);
                 rmdir("/run/udev/watch.old");
 
-        } else if (errno != ENOENT) {
+        } else if (errno != ENOENT)
                 log_error_errno(errno, "unable to move watches dir /run/udev/watch; old watches will not be restored: %m");
-        }
 }
 
 void udev_watch_begin(struct udev *udev, struct udev_device *dev) {
@@ -100,7 +99,7 @@ void udev_watch_begin(struct udev *udev, struct udev_device *dev) {
         wd = inotify_add_watch(inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE);
         if (wd < 0) {
                 log_error_errno(errno, "inotify_add_watch(%d, %s, %o) failed: %m",
-                    inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE);
+                                inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE);
                 return;
         }