core: optionally create LOGIN_PROCESS or USER_PROCESS utmp entries

When generating utmp/wtmp entries, optionally add both LOGIN_PROCESS and
INIT_PROCESS entries or even all three of LOGIN_PROCESS, INIT_PROCESS
and USER_PROCESS entries, instead of just a single INIT_PROCESS entry.

With this change systemd may be used to not only invoke a getty directly
in a SysV-compliant way but alternatively also a login(1) implementation
or even forego getty and login entirely, and invoke arbitrary shells in
a way that they appear in who(1) or w(1).

This is preparation for a later commit that adds a "machinectl shell"
operation to invoke a shell in a container, in a way that is compatible
with who(1) and w(1).

1 files changed, 2 insertions, 2 deletions

diff --git a/src/shared/utmp-wtmp.h b/src/shared/utmp-wtmp.h
index 5d26ba6fb1..e0ceb873ac 100644
--- a/src/shared/utmp-wtmp.h
+++ b/src/shared/utmp-wtmp.h
@@ -31,7 +31,7 @@ int utmp_put_reboot(usec_t timestamp);
 int utmp_put_runlevel(int runlevel, int previous);
 
 int utmp_put_dead_process(const char *id, pid_t pid, int code, int status);
-int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line);
+int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line, int ut_type, const char *user);
 
 int utmp_wall(
         const char *message,
@@ -57,7 +57,7 @@ static inline int utmp_put_runlevel(int runlevel, int previous) {
 static inline int utmp_put_dead_process(const char *id, pid_t pid, int code, int status) {
         return 0;
 }
-static inline int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line) {
+static inline int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line, int ut_type, const char *user) {
         return 0;
 }
 static inline int utmp_wall(