shared: rework env file reader

Implement this with a proper state machine, so that newlines and
escaped chars can appear in string assignments. This should bring the
parser much closer to shell.

1 files changed, 101 insertions, 0 deletions

diff --git a/src/test/test-fileio.c b/src/test/test-fileio.c
new file mode 100644
index 0000000000..55eb7539fd
--- /dev/null
+++ b/src/test/test-fileio.c
@@ -0,0 +1,101 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "util.h"
+#include "fileio.h"
+#include "strv.h"
+
+static void test_parse_env_file(void) {
+        char t[] = "/tmp/test-parse-env-file-XXXXXX";
+        int fd, r;
+        FILE *f;
+        _cleanup_free_ char *one = NULL, *two = NULL, *three = NULL, *four = NULL, *five = NULL, *six = NULL, *seven = NULL;
+        _cleanup_strv_free_ char **a = NULL;
+        char **i;
+
+        fd = mkostemp(t, O_CLOEXEC);
+        assert_se(fd >= 0);
+
+        f = fdopen(fd, "w");
+        assert_se(f);
+
+        fputs("one=BAR   \n"
+              "# comment\n"
+              " # comment \n"
+              "  two   =   bar    \n"
+              "invalid line\n"
+              "three = \"333\n"
+              "xxxx\"\n"
+              "four = \'44\\\"44\'\n"
+              "five = \'55\\\'55\' \"FIVE\" cinco   \n"
+              "six = seis sechs\\\n"
+              " sis\n"
+              "seven=", f);
+
+        fflush(f);
+        fclose(f);
+
+        r = parse_env_file(
+                        t, NULL,
+                       "one", &one,
+                       "two", &two,
+                       "three", &three,
+                       "four", &four,
+                       "five", &five,
+                       "six", &six,
+                       "seven", &seven,
+                       NULL);
+
+        assert_se(r >= 0);
+
+        log_info("one=[%s]", strna(one));
+        log_info("two=[%s]", strna(two));
+        log_info("three=[%s]", strna(three));
+        log_info("four=[%s]", strna(four));
+        log_info("five=[%s]", strna(five));
+        log_info("six=[%s]", strna(six));
+        log_info("seven=[%s]", strna(seven));
+
+        assert_se(streq(one, "BAR"));
+        assert_se(streq(two, "bar"));
+        assert_se(streq(three, "333\nxxxx"));
+        assert_se(streq(four, "44\"44"));
+        assert_se(streq(five, "55\'55FIVEcinco"));
+        assert_se(streq(six, "seis sechs sis"));
+        assert_se(seven == NULL);
+
+        r = load_env_file(t, NULL, &a);
+        assert_se(r >= 0);
+
+        STRV_FOREACH(i, a)
+                log_info("Got: %s", *i);
+
+        unlink(t);
+}
+
+int main(int argc, char *argv[]) {
+        test_parse_env_file();
+        return 0;
+}