build-sys: automatically detect SysV init dirs

Makefile.am

@@ -23,7 +23,8 @@ AM_CPPFLAGS = \
         -include $(top_builddir)/config.h \
 	-DSYSTEM_CONFIG_UNIT_PATH=\"$(pkgsysconfdir)/system\" \
 	-DSYSTEM_DATA_UNIT_PATH=\"$(pkgdatadir)/system\" \
-	-DSYSTEM_SYSVINIT_PATH=\"$(sysconfdir)/init.d\" \
+	-DSYSTEM_SYSVINIT_PATH=\"$(SYSTEM_SYSVINIT_PATH)\" \
+	-DSYSTEM_RCND_PATH=\"$(SYSTEM_SYSVRCND_PATH)\" \
 	-DSESSION_CONFIG_UNIT_PATH=\"$(pkgsysconfdir)/session\" \
 	-DSESSION_DATA_UNIT_PATH=\"$(pkgdatadir)/session\" \
 	-DCGROUP_AGENT_PATH=\"$(pkglibexecdir)/systemd-cgroups-agent\"

configure.ac

@@ -76,4 +76,59 @@ AC_SUBST(CGROUP_LIBS)
 AM_PROG_VALAC()
 AC_SUBST(VAPIDIR)
 
+AC_ARG_WITH(distro, AS_HELP_STRING([--with-distro=DISTRO],[Specify the distribution to target: One of fedora, suse, debian, or none]))
+if test "z$with_distro" = "z"; then
+        if test "$cross_compiling" = yes; then
+                AC_MSG_WARN([Target distribution cannot be reliably detected when cross-compiling. You should specify it with --with-distro (see $0 --help for recognized distros)])
+        else
+                AC_CHECK_FILE(/etc/redhat-release,with_distro="fedora")
+                AC_CHECK_FILE(/etc/SuSE-release,with_distro="suse")
+                AC_CHECK_FILE(/etc/debian_version,with_distro="debian")
+        fi
+        if test "z$with_distro" = "z"; then
+                with_distro=`uname -s`
+        fi
+fi
+with_distro=`echo ${with_distro} | tr '[[:upper:]]' '[[:lower:]]' `
+
+echo "hallo"
+
+case $with_distro in
+        fedora)
+                SYSTEM_SYSVINIT_PATH=/etc/rc.d/init.d
+                SYSTEM_SYSVRCND_PATH=/etc/rc.d
+                ;;
+        suse)
+                SYSTEM_SYSVINIT_PATH=/etc/init.d
+                SYSTEM_SYSVRCND_PATH=/etc/init.d
+                ;;
+        debian)
+                SYSTEM_SYSVINIT_PATH=/etc/init.d
+                SYSTEM_SYSVRCND_PATH=/etc
+                ;;
+        none)
+                SYSTEM_SYSVINIT_PATH=/etc/fix/the/configure/script
+                SYSTEM_SYSVRCND_PATH=/etc/fix/the/configure/script
+                ;;
+        *)
+                AC_MSG_ERROR([Your distribution (${with_distro}) is not yet supported, SysV init scripts could not be found! (patches welcome); you can specify --with-distro=none to skip this check])
+                ;;
+esac
+
+echo "hallo"
+
+AC_SUBST(SYSTEM_SYSVINIT_PATH)
+AC_SUBST(SYSTEM_RCND_PATH)
+
+AM_CONDITIONAL(TARGET_FEDORA, test x"$with_distro" = xfedora)
+AM_CONDITIONAL(TARGET_SUSE, test x"$with_distro" = xsuse)
+AM_CONDITIONAL(TARGET_DEBIAN, test x"$with_distro" = xdebian)
+
 AC_OUTPUT([Makefile])
+
+echo "
+        $PACKAGE_NAME $VERSION
+
+        SysV init scripts:       ${SYSTEM_SYSVINIT_PATH}
+        SysV rc?.d directories:  ${SYSTEM_SYSVRCND_PATH}
+"

manager.c

@@ -232,10 +232,24 @@ static int manager_find_paths(Manager *m) {
                                               NULL)))
                                 return -ENOMEM;
                 }
+
+                if ((e = getenv("SYSTEMD_SYSVRCND_PATH")))
+                        if (!(m->sysvrcnd_path = split_path_and_make_absolute(e)))
+                                return -ENOMEM;
+
+                if (strv_isempty(m->sysvrcnd_path)) {
+                        strv_free(m->sysvrcnd_path);
+
+                        if (!(m->sysvrcnd_path = strv_new(
+                                              SYSTEM_SYSVRCND_PATH,     /* /etc/rcN.d/ */
+                                              NULL)))
+                                return -ENOMEM;
+                }
         }
 
         strv_uniq(m->unit_path);
         strv_uniq(m->sysvinit_path);
+        strv_uniq(m->sysvrcnd_path);
 
         assert(!strv_isempty(m->unit_path));
         if (!(t = strv_join(m->unit_path, "\n\t")))
@@ -253,6 +267,16 @@ static int manager_find_paths(Manager *m) {
         } else
                 log_debug("Ignoring SysV init scripts.");
 
+        if (!strv_isempty(m->sysvrcnd_path)) {
+
+                if (!(t = strv_join(m->sysvrcnd_path, "\n\t")))
+                        return -ENOMEM;
+
+                log_debug("Looking for SysV rcN.d links in:\n\t%s", t);
+                free(t);
+        } else
+                log_debug("Ignoring SysV rcN.d links.");
+
         return 0;
 }
 
@@ -363,6 +387,7 @@ void manager_free(Manager *m) {
 
         strv_free(m->unit_path);
         strv_free(m->sysvinit_path);
+        strv_free(m->sysvrcnd_path);
 
         free(m->cgroup_controller);
         free(m->cgroup_hierarchy);

manager.h

@@ -146,6 +146,7 @@ struct Manager {
 
         char **unit_path;
         char **sysvinit_path;
+        char **sysvrcnd_path;
 
         /* Data specific to the device subsystem */
         struct udev* udev;

service.c

@@ -36,13 +36,13 @@
 #define LINE_MAX 4096
 
 static const char * const rcnd_table[] = {
-        "../rc0.d", SPECIAL_RUNLEVEL0_TARGET,
-        "../rc1.d", SPECIAL_RUNLEVEL1_TARGET,
-        "../rc2.d", SPECIAL_RUNLEVEL2_TARGET,
-        "../rc3.d", SPECIAL_RUNLEVEL3_TARGET,
-        "../rc4.d", SPECIAL_RUNLEVEL4_TARGET,
-        "../rc5.d", SPECIAL_RUNLEVEL5_TARGET,
-        "../rc6.d", SPECIAL_RUNLEVEL6_TARGET
+        "/rc0.d", SPECIAL_RUNLEVEL0_TARGET,
+        "/rc1.d", SPECIAL_RUNLEVEL1_TARGET,
+        "/rc2.d", SPECIAL_RUNLEVEL2_TARGET,
+        "/rc3.d", SPECIAL_RUNLEVEL3_TARGET,
+        "/rc4.d", SPECIAL_RUNLEVEL4_TARGET,
+        "/rc5.d", SPECIAL_RUNLEVEL5_TARGET,
+        "/rc6.d", SPECIAL_RUNLEVEL6_TARGET
 };
 
 
@@ -218,7 +218,7 @@ static int priority_from_rcd(Service *s, const char *init_script) {
         char **p;
         unsigned i;
 
-        STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path)
+        STRV_FOREACH(p, UNIT(s)->meta.manager->sysrcnd_path)
                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
                         char *path;
                         DIR *d;