exit-status: kill is_clean_exit_lsb(), move logic to sysv-generator

Let's get rid of is_clean_exit_lsb(), let's move the logic for the special
handling of the two LSB exit codes into the sysv-generator by writing out
appropriate SuccessExitStatus= lines if the LSB header exists. This is not only
semantically more correct, bug also fixes a bug as the code in service.c that
chose between is_clean_exit_lsb() and is_clean_exit() based this check on
whether a native unit files was available for the unit. However, that check was
bogus since a long time, since the SysV generator was introduced and native
SysV script support was removed from PID 1, as in that case a unit file always
existed.

src/basic/exit-status.c

@@ -194,16 +194,6 @@ bool is_clean_exit(int code, int status, ExitStatusSet *success_status) {
         return false;
 }
 
-bool is_clean_exit_lsb(int code, int status, ExitStatusSet *success_status) {
-
-        if (is_clean_exit(code, status, success_status))
-                return true;
-
-        return
-                code == CLD_EXITED &&
-                IN_SET(status, EXIT_NOTINSTALLED, EXIT_NOTCONFIGURED);
-}
-
 void exit_status_set_free(ExitStatusSet *x) {
         assert(x);
 

src/basic/exit-status.h

@@ -99,7 +99,6 @@ typedef struct ExitStatusSet {
 const char* exit_status_to_string(int status, ExitStatusLevel level) _const_;
 
 bool is_clean_exit(int code, int status, ExitStatusSet *success_status);
-bool is_clean_exit_lsb(int code, int status, ExitStatusSet *success_status);
 
 void exit_status_set_free(ExitStatusSet *x);
 bool exit_status_set_is_empty(ExitStatusSet *x);

src/core/service.c

@@ -2600,8 +2600,7 @@ static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
         assert(s);
         assert(pid >= 0);
 
-        if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
-                                     is_clean_exit_lsb(code, status, &s->success_status))
+        if (is_clean_exit(code, status, &s->success_status))
                 f = SERVICE_SUCCESS;
         else if (code == CLD_EXITED)
                 f = SERVICE_FAILURE_EXIT_CODE;

src/systemctl/systemctl.c

@@ -3936,7 +3936,7 @@ static void print_status_info(
                 argv = strv_join(p->argv, " ");
                 printf("  Process: "PID_FMT" %s=%s ", p->pid, p->name, strna(argv));
 
-                good = is_clean_exit_lsb(p->code, p->status, NULL);
+                good = is_clean_exit(p->code, p->status, NULL);
                 if (!good) {
                         on = ansi_highlight_red();
                         off = ansi_normal();

src/sysv-generator/sysv-generator.c

@@ -25,6 +25,7 @@
 
 #include "alloc-util.h"
 #include "dirent-util.h"
+#include "exit-status.h"
 #include "fd-util.h"
 #include "fileio.h"
 #include "hashmap.h"
@@ -199,6 +200,13 @@ static int generate_unit_file(SysvStub *s) {
         if (s->pid_file)
                 fprintf(f, "PIDFile=%s\n", s->pid_file);
 
+        /* Consider two special LSB exit codes a clean exit */
+        if (s->has_lsb)
+                fprintf(f,
+                        "SuccessExitStatus=%i %i\n",
+                        EXIT_NOTINSTALLED,
+                        EXIT_NOTCONFIGURED);
+
         fprintf(f,
                 "ExecStart=%s start\n"
                 "ExecStop=%s stop\n",