From 72b3ff75e786efa2c9b2fdfb50e46597434c5420 Mon Sep 17 00:00:00 2001

From: Lukas Nykryn <lnykryn@redhat.com>

Date: Wed, 20 Jan 2016 15:16:32 +0100

Subject: [PATCH] sysv-generator: do not join dependencies on one line, split

 them

If there is a lot of initscripts and dependencies between them we might

end generating After= (and similar) lines which are longer then LINE_MAX

and thus rejected by parser in systemd.

Fixes #2099

Cherry-picked from: c584ffc0b75d4b9e9229bf1d8edb7d89562be3c1

Resolves: #1288600

---

 src/sysv-generator/sysv-generator.c | 44 ++++++++++---------------------------

 test/sysv-generator-test.py         | 18 +++++++++++++--

 2 files changed, 28 insertions(+), 34 deletions(-)

diff --git a/src/sysv-generator/sysv-generator.c b/src/sysv-generator/sysv-generator.c

index 0a8a528..d60e75a 100644

--- a/src/sysv-generator/sysv-generator.c

+++ b/src/sysv-generator/sysv-generator.c

@@ -134,34 +134,14 @@ static int add_alias(const char *service, const char *alias) {

 }

 static int generate_unit_file(SysvStub *s) {

-        char **p;

         _cleanup_fclose_ FILE *f = NULL;

-        _cleanup_free_ char *unit = NULL;

-        _cleanup_free_ char *before = NULL;

-        _cleanup_free_ char *after = NULL;

-        _cleanup_free_ char *wants = NULL;

-        _cleanup_free_ char *conflicts = NULL;

+        const char *unit;

+        char **p;

         int r;

-        before = strv_join(s->before, " ");

-        if (!before)

-                return log_oom();

-

-        after = strv_join(s->after, " ");

-        if (!after)

-                return log_oom();

-

-        wants = strv_join(s->wants, " ");

-        if (!wants)

-                return log_oom();

-

-        conflicts = strv_join(s->conflicts, " ");

-        if (!conflicts)

-                return log_oom();

+        assert(s);

-        unit = strjoin(arg_dest, "/", s->name, NULL);

-        if (!unit)

-                return log_oom();

+        unit = strjoina(arg_dest, "/", s->name);

         /* We might already have a symlink with the same name from a Provides:,

          * or from backup files like /etc/init.d/foo.bak. Real scripts always win,

@@ -183,14 +163,14 @@ static int generate_unit_file(SysvStub *s) {

                 "Description=%s\n",

                 s->path, s->description);

-        if (!isempty(before))

-                fprintf(f, "Before=%s\n", before);

-        if (!isempty(after))

-                fprintf(f, "After=%s\n", after);

-        if (!isempty(wants))

-                fprintf(f, "Wants=%s\n", wants);

-        if (!isempty(conflicts))

-                fprintf(f, "Conflicts=%s\n", conflicts);

+        STRV_FOREACH(p, s->before)

+                fprintf(f, "Before=%s\n", *p);

+        STRV_FOREACH(p, s->after)

+                fprintf(f, "After=%s\n", *p);

+        STRV_FOREACH(p, s->wants)

+                fprintf(f, "Wants=%s\n", *p);

+        STRV_FOREACH(p, s->conflicts)

+                fprintf(f, "Conflicts=%s\n", *p);

         fprintf(f,

                 "\n[Service]\n"

diff --git a/test/sysv-generator-test.py b/test/sysv-generator-test.py

index 2060ad7..25a35da 100644

--- a/test/sysv-generator-test.py

+++ b/test/sysv-generator-test.py

@@ -23,6 +23,7 @@ import subprocess

 import tempfile

 import shutil

 from glob import glob

+import collections

 try:

     from configparser import RawConfigParser

@@ -32,6 +33,12 @@ except ImportError:

 sysv_generator = os.path.join(os.environ.get('builddir', '.'), 'systemd-sysv-generator')

+class MultiDict(collections.OrderedDict):

+    def __setitem__(self, key, value):

+        if isinstance(value, list) and key in self:

+            self[key].extend(value)

+        else:

+            super(MultiDict, self).__setitem__(key, value)

 class SysvGeneratorTest(unittest.TestCase):

     def setUp(self):

@@ -77,7 +84,14 @@ class SysvGeneratorTest(unittest.TestCase):

         for service in glob(self.out_dir + '/*.service'):

             if os.path.islink(service):

                 continue

-            cp = RawConfigParser()

+            try:

+                # for python3 we need here strict=False to parse multiple

+                # lines with the same key

+                cp = RawConfigParser(dict_type=MultiDict, strict=False)

+            except TypeError:

+                # RawConfigParser in python2 does not have the strict option

+                # but it allows multiple lines with the same key by default

+                cp = RawConfigParser(dict_type=MultiDict)

             cp.optionxform = lambda o: o  # don't lower-case option names

             with open(service) as f:

                 cp.readfp(f)

@@ -215,7 +229,7 @@ class SysvGeneratorTest(unittest.TestCase):

         s = self.run_generator()[1]['foo.service']

         self.assertEqual(set(s.options('Unit')),

                          set(['Documentation', 'SourcePath', 'Description', 'After']))

-        self.assertEqual(s.get('Unit', 'After'), 'nss-lookup.target rpcbind.target')

+        self.assertEqual(s.get('Unit', 'After').split(), ['nss-lookup.target', 'rpcbind.target'])

     def test_lsb_deps(self):

         '''LSB header dependencies to other services'''