use #pragma once instead of foo*foo define guards

src/core/killall.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef fookillallhfoo
-#define fookillallhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -23,5 +22,3 @@
 ***/
 
 void broadcast_signal(int sig, bool wait);
-
-#endif

src/core/switch-root.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef fooswitchroothfoo
-#define fooswitchroothfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -23,5 +22,3 @@
 ***/
 
 int switch_root(const char *switch_root);
-
-#endif

src/core/syscall-list.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foosyscalllisthfoo
-#define foosyscalllisthfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -40,5 +39,3 @@ const char *syscall_to_name(int id);
 int syscall_from_name(const char *name);
 
 int syscall_max(void);
-
-#endif

src/core/transaction.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef footransactionhfoo
-#define footransactionhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -53,5 +52,3 @@ int transaction_add_job_and_dependencies(
 int transaction_activate(Transaction *tr, Manager *m, JobMode mode, DBusError *e);
 int transaction_add_isolate_jobs(Transaction *tr, Manager *m);
 void transaction_abort(Transaction *tr);
-
-#endif

src/login/logind-action.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foologindactionhfoo
-#define foologindactionhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -50,5 +49,3 @@ const char* handle_action_to_string(HandleAction h) _const_;
 HandleAction handle_action_from_string(const char *s) _pure_;
 
 int config_parse_handle_action(const char *unit, const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
-
-#endif

src/login/logind-button.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foologindbuttonhfoo
-#define foologindbuttonhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -45,5 +44,3 @@ void button_free(Button*b);
 int button_open(Button *b);
 int button_recheck(Button *b);
 int button_set_seat(Button *b, const char *sn);
-
-#endif

src/login/logind-inhibit.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foologindinhibithfoo
-#define foologindinhibithfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -93,5 +92,3 @@ InhibitWhat inhibit_what_from_string(const char *s);
 
 const char *inhibit_mode_to_string(InhibitMode k);
 InhibitMode inhibit_mode_from_string(const char *s);
-
-#endif

src/nss-myhostname/ifconf.h

@@ -1,9 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef fooifconfhfoo
-#define fooifconfhfoo
-
-#include <sys/socket.h>
+#pragma once
 
 /***
   This file is part of systemd.
@@ -27,6 +24,7 @@
 #include <inttypes.h>
 #include <sys/types.h>
 #include <assert.h>
+#include <sys/socket.h>
 
 struct address {
         unsigned char family;
@@ -68,6 +66,3 @@ static inline int address_compare(const void *_a, const void *_b) {
 
         return 0;
 }
-
-
-#endif

src/shared/audit.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef fooaudithfoo
-#define fooaudithfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -28,5 +27,3 @@
 
 int audit_session_from_pid(pid_t pid, uint32_t *id);
 int audit_loginuid_from_pid(pid_t pid, uid_t *uid);
-
-#endif

src/shared/capability.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foocapabilityhfoo
-#define foocapabilityhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -29,5 +28,3 @@ unsigned long cap_last_cap(void);
 int have_effective_cap(int value);
 int capability_bounding_set_drop(uint64_t drop, bool right_now);
 int capability_bounding_set_drop_usermode(uint64_t drop);
-
-#endif

src/shared/cgroup-show.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foocgroupshowhfoo
-#define foocgroupshowhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -32,5 +31,3 @@ int show_cgroup(const char *controller, const char *path, const char *prefix, un
 
 int show_cgroup_and_extra_by_spec(const char *spec, const char *prefix, unsigned n_columns, bool kernel_threads, const pid_t extra_pids[], unsigned n_extra_pids, OutputFlags flags);
 int show_cgroup_and_extra(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, const pid_t extra_pids[], unsigned n_extra_pids, OutputFlags flags);
-
-#endif

src/shared/conf-files.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef fooconffileshfoo
-#define fooconffileshfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -28,5 +27,3 @@
 int conf_files_list(char ***strv, const char *suffix, const char *root, const char *dir, ...);
 int conf_files_list_strv(char ***strv, const char *suffix, const char *root, const char* const* dirs);
 int conf_files_list_nulstr(char ***strv, const char *suffix, const char *root, const char *dirs);
-
-#endif

src/shared/hwclock.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foohwclockhfoo
-#define foohwclockhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -27,5 +26,3 @@ int hwclock_set_timezone(int *min);
 int hwclock_reset_timezone(void);
 int hwclock_get_time(struct tm *tm);
 int hwclock_set_time(const struct tm *tm);
-
-#endif

src/shared/spawn-polkit-agent.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foospawnpolkitagenthfoo
-#define foospawnpolkitagenthfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -24,5 +23,3 @@
 
 int polkit_agent_open(void);
 void polkit_agent_close(void);
-
-#endif