vconsole: permit configuration of vconsole settings via credentials

src/test/meson.build

@@ -260,6 +260,8 @@ tests += [
 
         [files('test-umask-util.c')],
 
+        [files('test-creds.c')],
+
         [files('test-proc-cmdline.c')],
 
         [files('test-fd-util.c'),

src/test/test-creds.c

@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "creds-util.h"
+#include "fileio.h"
+#include "path-util.h"
+#include "rm-rf.h"
+#include "tests.h"
+#include "tmpfile-util.h"
+
+TEST(read_credential_strings) {
+        _cleanup_free_ char *x = NULL, *y = NULL, *saved = NULL, *p = NULL;
+        _cleanup_(rm_rf_physical_and_freep) char *tmp = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+
+        const char *e = getenv("CREDENTIALS_DIRECTORY");
+        if (e)
+                assert_se(saved = strdup(e));
+
+        assert_se(read_credential_strings_many("foo", &x, "bar", &y) == -ENXIO);
+        assert_se(x == NULL);
+        assert_se(y == NULL);
+
+        assert_se(mkdtemp_malloc(NULL, &tmp) >= 0);
+
+        assert_se(setenv("CREDENTIALS_DIRECTORY", tmp, /* override= */ true) >= 0);
+
+        assert_se(read_credential_strings_many("foo", &x, "bar", &y) == -ENOENT);
+        assert_se(x == NULL);
+        assert_se(y == NULL);
+
+        assert_se(p = path_join(tmp, "bar"));
+        assert_se(write_string_file(p, "piff", WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_AVOID_NEWLINE) >= 0);
+
+        assert_se(read_credential_strings_many("foo", &x, "bar", &y) == -ENOENT);
+        assert_se(x == NULL);
+        assert_se(streq(y, "piff"));
+
+        assert_se(write_string_file(p, "paff", WRITE_STRING_FILE_TRUNCATE|WRITE_STRING_FILE_AVOID_NEWLINE) >= 0);
+
+        assert_se(read_credential_strings_many("foo", &x, "bar", &y) == -ENOENT);
+        assert_se(x == NULL);
+        assert_se(streq(y, "piff"));
+
+        p = mfree(p);
+        assert_se(p = path_join(tmp, "foo"));
+        assert_se(write_string_file(p, "knurz", WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_AVOID_NEWLINE) >= 0);
+
+        assert_se(read_credential_strings_many("foo", &x, "bar", &y) >= 0);
+        assert_se(streq(x, "knurz"));
+        assert_se(streq(y, "piff"));
+
+        y = mfree(y);
+
+        assert_se(read_credential_strings_many("foo", &x, "bar", &y) >= 0);
+        assert_se(streq(x, "knurz"));
+        assert_se(streq(y, "paff"));
+
+        p = mfree(p);
+        assert_se(p = path_join(tmp, "bazz"));
+        assert_se(f = fopen(p, "w"));
+        assert_se(fwrite("x\0y", 1, 3, f) == 3); /* embedded NUL byte should result in EBADMSG when reading back with read_credential_strings_many() */
+        f = safe_fclose(f);
+
+        assert_se(read_credential_strings_many("bazz", &x, "foo", &y) == -EBADMSG);
+        assert_se(streq(x, "knurz"));
+        assert_se(streq(y, "paff"));
+
+        if (saved)
+                assert_se(setenv("CREDENTIALS_DIRECTORY", saved, /* override= */ 1) >= 0);
+        else
+                assert_se(unsetenv("CREDENTIALS_DIRECTORY") >= 0);
+}
+
+DEFINE_TEST_MAIN(LOG_INFO);