1 | /* Test that dprintf returns the expected length. |
2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
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. |
9 | |
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. |
14 | |
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 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <stdio.h> |
20 | #include <string.h> |
21 | #include <support/check.h> |
22 | #include <sys/socket.h> |
23 | #include <unistd.h> |
24 | |
25 | static int |
26 | do_test (void) |
27 | { |
28 | /* Use a datagram socket to check that everything arrives in one packet. |
29 | The dprintf function should perform a single write call. */ |
30 | int fds[2]; |
31 | TEST_VERIFY_EXIT (socketpair (AF_LOCAL, SOCK_DGRAM, 0, fds) == 0); |
32 | |
33 | TEST_COMPARE (dprintf (fds[0], "(%d)%s[%d]" , 123, "---" , 4567), 14); |
34 | |
35 | char buf[32]; |
36 | ssize_t ret = read (fds[1], buf, sizeof (buf)); |
37 | TEST_VERIFY_EXIT (ret > 0); |
38 | TEST_COMPARE_BLOB (buf, ret, "(123)---[4567]" , strlen ("(123)---[4567]" )); |
39 | |
40 | close (fd: fds[1]); |
41 | close (fd: fds[0]); |
42 | return 0; |
43 | } |
44 | |
45 | #include <support/test-driver.c> |
46 | |