/*
- * Copyright (c) 2009, 2010, 2011 Nicira, Inc.
+ * Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <errno.h>
#include <stdlib.h>
+#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
lockfile_unlock(a);
}
+/* Checks that locking a dangling symlink works OK. (It used to hang.) */
+static void
+run_lock_symlink(void)
+{
+ struct lockfile *a, *b, *dummy;
+ struct stat s;
+
+ /* Create a symlink .a.~lock~ pointing to .b.~lock~. */
+ CHECK(symlink(".b.~lock~", ".a.~lock~"), 0);
+ CHECK(lstat(".a.~lock~", &s), 0);
+ CHECK(S_ISLNK(s.st_mode) != 0, 1);
+ CHECK(stat(".a.~lock~", &s), -1);
+ CHECK(errno, ENOENT);
+ CHECK(stat(".b.~lock~", &s), -1);
+ CHECK(errno, ENOENT);
+
+ CHECK(lockfile_lock("a", 0, &a), 0);
+ CHECK(lockfile_lock("a", 0, &dummy), EDEADLK);
+ CHECK(lockfile_lock("b", 0, &dummy), EDEADLK);
+ lockfile_unlock(a);
+
+ CHECK(lockfile_lock("b", 0, &b), 0);
+ CHECK(lockfile_lock("b", 0, &dummy), EDEADLK);
+ CHECK(lockfile_lock("a", 0, &dummy), EDEADLK);
+ lockfile_unlock(b);
+
+ CHECK(lstat(".a.~lock~", &s), 0);
+ CHECK(S_ISLNK(s.st_mode) != 0, 1);
+ CHECK(stat(".a.~lock~", &s), 0);
+ CHECK(S_ISREG(s.st_mode) != 0, 1);
+ CHECK(stat(".b.~lock~", &s), 0);
+ CHECK(S_ISREG(s.st_mode) != 0, 1);
+}
+
static void
run_help(void)
{
TEST(lock_timeout_gets_the_lock),
TEST(lock_timeout_runs_out),
TEST(lock_multiple),
+ TEST(lock_symlink),
TEST(help),
{ NULL, NULL }
#undef TEST