Update syscall lists for Linux 6.8
[glibc.git] / stdio-common / tst-dprintf-length.c
blob16cb6722336346dfa311d693ba6deeb82d0e53eb
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.
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 <https://www.gnu.org/licenses/>. */
19 #include <stdio.h>
20 #include <string.h>
21 #include <support/check.h>
22 #include <sys/socket.h>
23 #include <unistd.h>
25 static int
26 do_test (void)
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);
33 TEST_COMPARE (dprintf (fds[0], "(%d)%s[%d]", 123, "---", 4567), 14);
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]"));
40 close (fds[1]);
41 close (fds[0]);
42 return 0;
45 #include <support/test-driver.c>