File 1011-sysv-generator-add-back-support-for-SysV-scripts-for.patch of Package systemd.36651

From 022fd4ee36530cfb51c8b6f09d3af02dadbb7443 Mon Sep 17 00:00:00 2001
From: Franck Bui <fbui@suse.com>
Date: Thu, 26 May 2016 08:59:41 +0200
Subject: [PATCH] sysv-generator: add (back) support for SysV scripts
 for the early boot

For the record, the upstream support was removed by commit
3cdebc217c42c8529086f2965319b6a48eaaeabe.

The sysv-generator has some weirdos: for example a service at the rc0
runlevel won't be started during shutdown since it will get both
"WantedBy=poweroff.target" and "Conflicts=shutdown.target".

Anyways what's the current patch implements the following:

 - a symlink /etc/init.d/boot.d/S??boot.foo will add
   "WantedBy/Before=sysinit.target" constraints and make sure that the
   default dependencies added by systemd are turned off.

 - a symlink /etc/init.d/boot.d/K??boot.foo will add
   "Conflicts/Before=shutdown.target" so "foo" service will be stopped
   like any other regular services. If this symlink is not installed
   however, "foo" will be stopped lately during the systemd killing
   spree.

This is a forward-port of commit 29db8537e1ca10796797d9854d1 in SP1.

[Since v232]

Support for S* symlinks in runlevel 0 or 6 has been completely and silently
removed by 788d2b088b13a2444b9eb2ea82c0cc57d9f0980f. Since it was already
broken as pointed out above, this probably wasn't really used and therefore
no one will really care. So let's drop it too.

However this makes the support for early sysv scripts more difficult. To make
things easier, the support of K* symlinks in boot.d/ has been removed too: this
is probably not used (anymore) (at least intentionally).

The consequence is that early sysv services are stopped during shutdown at
the same time as 'normal' services.

- Update (03/20/2024)

  Fix in order to really skip redundant dependencies that references the
  service itself for early boot scripts too (issue noticed in bsc#1221479).
---
 src/sysv-generator/sysv-generator.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/sysv-generator/sysv-generator.c b/src/sysv-generator/sysv-generator.c
index bf23c48662..6c1fdcedbf 100644
--- a/src/sysv-generator/sysv-generator.c
+++ b/src/sysv-generator/sysv-generator.c
@@ -31,6 +31,9 @@ static const struct {
         const char *path;
         const char *target;
 } rcnd_table[] = {
+        /* SUSE style boot.d */
+        { "boot.d", SPECIAL_SYSINIT_TARGET },
+
         /* Standard SysV runlevels for start-up */
         { "rc1.d",  SPECIAL_RESCUE_TARGET     },
         { "rc2.d",  SPECIAL_MULTI_USER_TARGET },
@@ -57,6 +60,7 @@ typedef struct SysvStub {
         bool has_lsb;
         bool reload;
         bool loaded;
+        bool early;
 } SysvStub;
 
 static SysvStub* free_sysvstub(SysvStub *s) {
@@ -146,6 +150,12 @@ static int generate_unit_file(SysvStub *s) {
                 fprintf(f, "Description=%s\n", t);
         }
 
+        if (s->early) {
+                fprintf(f, "DefaultDependencies=no\n");
+                fprintf(f, "Conflicts=%s\n", SPECIAL_SHUTDOWN_TARGET);
+                fprintf(f, "Before=%s\n", SPECIAL_SHUTDOWN_TARGET);
+        }
+
         STRV_FOREACH(p, s->before)
                 fprintf(f, "Before=%s\n", *p);
         STRV_FOREACH(p, s->after)
@@ -212,6 +222,10 @@ static char *sysv_translate_name(const char *name) {
         _cleanup_free_ char *c = NULL;
         char *res;
 
+        if (startswith(name, "boot."))
+                /* Drop SUSE-style boot. prefix */
+                name += 5;
+
         c = strdup(name);
         if (!c)
                 return NULL;
@@ -651,6 +665,9 @@ static int fix_order(SysvStub *s, Hashmap *all_services) {
                 if (other->sysv_start_priority < 0)
                         continue;
 
+                if (s->early != other->early)
+                        continue;
+
                 /* If both units have modern headers we don't care
                  * about the priorities */
                 if (s->has_lsb && other->has_lsb)
@@ -775,6 +792,7 @@ static int enumerate_sysv(const LookupPaths *lp, Hashmap *all_services) {
                                 .sysv_start_priority = -1,
                                 .name = TAKE_PTR(name),
                                 .path = TAKE_PTR(fpath),
+                                .early = !!startswith(de->d_name, "boot."),
                         };
 
                         r = hashmap_put(all_services, service->name, service);
-- 
2.35.3