diff options
Diffstat (limited to 'gnulib-tests/test-dup2.c')
| -rw-r--r-- | gnulib-tests/test-dup2.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/gnulib-tests/test-dup2.c b/gnulib-tests/test-dup2.c index 9600c850..c7cb9656 100644 --- a/gnulib-tests/test-dup2.c +++ b/gnulib-tests/test-dup2.c @@ -1,5 +1,5 @@ /* Test duplicating file descriptors. - Copyright (C) 2009-2013 Free Software Foundation, Inc. + Copyright (C) 2009-2014 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -26,6 +26,10 @@ SIGNATURE_CHECK (dup2, int, (int, int)); #include <errno.h> #include <fcntl.h> +#if HAVE_SYS_RESOURCE_H +# include <sys/resource.h> +#endif + #include "binary-io.h" #if GNULIB_TEST_CLOEXEC @@ -103,6 +107,7 @@ main (void) { const char *file = "test-dup2.tmp"; char buffer[1]; + int bad_fd = getdtablesize (); int fd = open (file, O_CREAT | O_TRUNC | O_RDWR, 0600); /* Assume std descriptors were provided by invoker. */ @@ -145,8 +150,17 @@ main (void) errno = 0; ASSERT (dup2 (fd, -2) == -1); ASSERT (errno == EBADF); + if (bad_fd > 256) + { + ASSERT (dup2 (fd, 255) == 255); + ASSERT (dup2 (fd, 256) == 256); + ASSERT (close (255) == 0); + ASSERT (close (256) == 0); + } + ASSERT (dup2 (fd, bad_fd - 1) == bad_fd - 1); + ASSERT (close (bad_fd - 1) == 0); errno = 0; - ASSERT (dup2 (fd, 10000000) == -1); + ASSERT (dup2 (fd, bad_fd) == -1); ASSERT (errno == EBADF); /* Using dup2 can skip fds. */ |