fileio.c: do not parse comments after non-whitespace chars

systemd does not want to understand comments after the first
non-whitespace char occured.

key=foo #comment  will result into key == "foo #comment"
key="foo" #comment  will result into key == "foo#comment"
"key= #comment" will result into key == "#comment"
"key #comment" is an invalid line

2 files changed, 19 insertions, 16 deletions

diff --git a/src/shared/fileio.c b/src/shared/fileio.c
index 2a272593a..337b9e414 100644
--- a/src/shared/fileio.c
+++ b/src/shared/fileio.c
@@ -239,7 +239,7 @@ static int parse_env_file_internal(
                         break;
 
                 case PRE_VALUE:
-                        if (strchr(newline, c) || strchr(COMMENTS, c)) {
+                        if (strchr(newline, c)) {
                                 state = PRE_KEY;
                                 key[n_key] = 0;
 
@@ -247,7 +247,7 @@ static int parse_env_file_internal(
                                         value[n_value] = 0;
 
                                 /* strip trailing whitespace from key */
-                                while(strchr(WHITESPACE, key[--n_key]))
+                                while(n_key && strchr(WHITESPACE, key[--n_key]))
                                         key[n_key]=0;
 
                                 r = push(key, value, userdata);
@@ -279,6 +279,7 @@ static int parse_env_file_internal(
                 case VALUE:
                         if (strchr(newline, c)) {
                                 state = PRE_KEY;
+
                                 key[n_key] = 0;
 
                                 if (value)
@@ -289,7 +290,7 @@ static int parse_env_file_internal(
                                         value[last_whitespace] = 0;
 
                                 /* strip trailing whitespace from key */
-                                while(strchr(WHITESPACE, key[--n_key]))
+                                while(n_key && strchr(WHITESPACE, key[--n_key]))
                                         key[n_key]=0;
 
                                 r = push(key, value, userdata);
@@ -417,7 +418,7 @@ static int parse_env_file_internal(
                         value[n_value] = 0;
 
                 /* strip trailing whitespace from key */
-                while(strchr(WHITESPACE, key[--n_key]))
+                while(n_key && strchr(WHITESPACE, key[--n_key]))
                         key[n_key]=0;
 
                 r = push(key, value, userdata);
diff --git a/src/test/test-fileio.c b/src/test/test-fileio.c
index 2a74104e7..d56f7cc85 100644
--- a/src/test/test-fileio.c
+++ b/src/test/test-fileio.c
@@ -47,16 +47,18 @@ static void test_parse_env_file(void) {
         fputs("one=BAR   \n"
               "# comment\n"
               " # comment \n"
+              " ; comment \n"
               "  two   =   bar    \n"
               "invalid line\n"
+              "invalid line #comment\n"
               "three = \"333\n"
               "xxxx\"\n"
               "four = \'44\\\"44\'\n"
               "five = \'55\\\'55\' \"FIVE\" cinco   \n"
               "six = seis sechs\\\n"
               " sis\n"
-              "seven=\"sevenval\"#comment\n"
-              "eight=#comment\n"
+              "seven=\"sevenval\" #nocomment\n"
+              "eight=eightval #nocomment\n"
               "export nine=nineval\n"
               "ten=", f);
 
@@ -75,20 +77,14 @@ static void test_parse_env_file(void) {
         assert_se(streq(a[3], "four=44\"44"));
         assert_se(streq(a[4], "five=55\'55FIVEcinco"));
         assert_se(streq(a[5], "six=seis sechs sis"));
-        assert_se(streq(a[6], "seven=sevenval"));
-        assert_se(streq(a[7], "eight="));
+        assert_se(streq(a[6], "seven=sevenval#nocomment"));
+        assert_se(streq(a[7], "eight=eightval #nocomment"));
         assert_se(streq(a[8], "export nine=nineval"));
         assert_se(streq(a[9], "ten="));
         assert_se(a[10] == NULL);
 
         strv_env_clean_log(a, "/tmp/test-fileio");
 
-        r = write_env_file("/tmp/test-fileio", a);
-        assert_se(r >= 0);
-
-        r = load_env_file("/tmp/test-fileio", NULL, &b);
-        assert_se(r >= 0);
-
         k = 0;
         STRV_FOREACH(i, b) {
                 log_info("Got2: <%s>", *i);
@@ -128,11 +124,17 @@ static void test_parse_env_file(void) {
         assert_se(streq(four, "44\"44"));
         assert_se(streq(five, "55\'55FIVEcinco"));
         assert_se(streq(six, "seis sechs sis"));
-        assert_se(streq(seven, "sevenval"));
-        assert_se(eight == NULL);
+        assert_se(streq(seven, "sevenval#nocomment"));
+        assert_se(streq(eight, "eightval #nocomment"));
         assert_se(streq(nine, "nineval"));
         assert_se(ten == NULL);
 
+        r = write_env_file("/tmp/test-fileio", a);
+        assert_se(r >= 0);
+
+        r = load_env_file("/tmp/test-fileio", NULL, &b);
+        assert_se(r >= 0);
+
         unlink(t);
         unlink("/tmp/test-fileio");
 }