Fix buffer overflow for writes to memory buffer stream (bug 18549)
[glibc.git] / dirent / opendir-tst1.c
blobd0a43818ce80acdf4b257f94cc42ae8ac2650841
1 /* Copyright (C) 1998-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 #include <dirent.h>
20 #include <errno.h>
21 #include <fcntl.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <unistd.h>
27 /* Name of the FIFO. */
28 char tmpname[] = "fifoXXXXXX";
31 /* Do the real work. */
32 static int
33 real_test (void)
35 DIR *dirp;
37 /* This should not block for an FIFO. */
38 dirp = opendir (tmpname);
40 /* Successful. */
41 if (dirp != NULL)
43 /* Oh, oh, how can this work? */
44 fputs ("`opendir' succeeded on a FIFO???\n", stdout);
45 closedir (dirp);
46 return 1;
49 if (errno != ENOTDIR)
51 fprintf (stdout, "`opendir' return error `%s' instead of `%s'\n",
52 strerror (errno), strerror (ENOTDIR));
53 return 1;
56 return 0;
60 static int
61 do_test (int argc, char *argv[])
63 int retval;
65 if (mktemp (tmpname) == NULL)
67 perror ("mktemp");
68 return 1;
71 /* Try to generate a FIFO. */
72 if (mknod (tmpname, 0600 | S_IFIFO, 0) < 0)
74 perror ("mknod");
75 /* We cannot make this an error. */
76 return 0;
79 retval = real_test ();
81 remove (tmpname);
83 return retval;
87 static void
88 do_cleanup (void)
90 remove (tmpname);
92 #define CLEANUP_HANDLER do_cleanup ()
95 /* Include the test skeleton. */
96 #include <test-skeleton.c>