File _service:tar_scm:backport-basic-env-util-correc... of Package systemd

File _service:tar_scm:backport-basic-env-util-correctly-parse-extended-vars-after-n.patch of Package systemd

From 74583cad5a3bf4051b879b8b1ac53934027ef485 Mon Sep 17 00:00:00 2001
From: Andrew Soutar <andrew@andrewsoutar.com>
Date: Tue, 5 Oct 2021 22:55:27 -0400
Subject: [PATCH] basic/env-util: correctly parse extended vars after
 non-extended vars (#20941)

(cherry picked from commit 5ef97a712236f0ddddec52665c0aea7d4e6d3c13)

Conflict:NA
Reference:https://github.com/systemd/systemd/commit/74583cad5a3bf4051b879b8b1ac53934027ef485
---
 src/basic/env-util.c     | 1 +
 src/test/test-env-util.c | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/basic/env-util.c b/src/basic/env-util.c
index 81b1e3f10e..1ca445dab4 100644
--- a/src/basic/env-util.c
+++ b/src/basic/env-util.c
@@ -577,6 +577,7 @@ char *replace_env_n(const char *format, size_t n, char **env, unsigned flags) {
 
                                 word = e+1;
                                 state = WORD;
+                                nest--;
                         } else if (*e == ':') {
                                 if (flags & REPLACE_ENV_ALLOW_EXTENDED) {
                                         len = e - word - 2;
diff --git a/src/test/test-env-util.c b/src/test/test-env-util.c
index ed4580e4af..3d5951c46e 100644
--- a/src/test/test-env-util.c
+++ b/src/test/test-env-util.c
@@ -198,7 +198,7 @@ static void test_replace_env2(bool extended) {
                 "BAR=bar",
                 NULL
         };
-        _cleanup_free_ char *t = NULL, *s = NULL, *q = NULL, *r = NULL, *p = NULL, *x = NULL;
+        _cleanup_free_ char *t = NULL, *s = NULL, *q = NULL, *r = NULL, *p = NULL, *x = NULL, *y = NULL;
         unsigned flags = REPLACE_ENV_ALLOW_EXTENDED*extended;
 
         t = replace_env("FOO=${FOO:-${BAR}}", (char**) env, flags);
@@ -218,6 +218,9 @@ static void test_replace_env2(bool extended) {
 
         x = replace_env("XXX=${XXX:+${BAR}post}", (char**) env, flags);
         assert_se(streq(x, extended ? "XXX=" : "XXX=${XXX:+barpost}"));
+
+        y = replace_env("FOO=${FOO}between${BAR:-baz}", (char**) env, flags);
+        assert_se(streq(y, extended ? "FOO=foobetweenbar" : "FOO=foobetween${BAR:-baz}"));
 }
 
 static void test_replace_env_argv(void) {
-- 
2.33.0