tests/cases/test-symlinks.c

   1 /*
   2  * Copyright (c) 2020 Apple Inc. All rights reserved.
   3  *
   4  * <rdar://problem/65693863>  UNIX Conformance | hfs_vnop_symlink should not validate empty path.
   5  */
   6 #include <unistd.h>
   7 #include <sys/stat.h>
   8
   9
  10 #include "hfs-tests.h"
  11 #include "test-utils.h"
  12 #include "disk-image.h"
  13
  14 #define SYMPLINK_TEST_DIR "symlink.testdir"
  15 #define SYMLINK_EMPTYSTR "symlink.emptystr"
  16 TEST(symlinks)
  17
  18 int run_symlinks(__unused test_ctx_t *ctx)
  19 {
  20         disk_image_t *di;
  21         struct stat statb;
  22         char *parent_dir, *slink;
  23         char buf;
  24
  25         di = disk_image_get();
  26
  27         //
  28         // Create a parent directory to host our test.
  29         //
  30         asprintf(&parent_dir, "%s/"SYMPLINK_TEST_DIR, di->mount_point);
  31         assert(!mkdir(parent_dir, 0777) || errno == EEXIST);
  32
  33         //
  34         // Now check to make sure we support creating a symlink with an empty
  35         // target required for UNIX Conformance.
  36         //
  37         asprintf(&slink, "%s/"SYMLINK_EMPTYSTR, parent_dir);
  38         assert_no_err(symlink("", slink));
  39
  40         //
  41         // Test that symlink has "l" as the S_ISLNK flag using lstat
  42         //
  43         memset(&statb, 0, sizeof(statb));
  44         assert(!(lstat(slink, &statb) < 0 ));
  45         assert(S_ISLNK(statb.st_mode));
  46
  47         //
  48         // Test that readlink returns zero.
  49         //
  50         assert(!readlink(slink, &buf, 1));
  51
  52         //
  53         // Delete test symlink, test directory and release all resources.
  54         //
  55         unlink(slink);
  56         unlink(parent_dir);
  57         free(slink);
  58         free(parent_dir);
  59         return 0;
  60 }