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stdio-common/tst-dprintf-length.c
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Paul Eggert
Update copyright dates with scripts/update-copyrights
02 янв 2026, 00:42
02 янв 2026, 00:42
66f3e92
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/* Test that dprintf returns the expected length. Copyright (C) 2023-2026 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <stdio.h> #include <string.h> #include <support/check.h> #include <sys/socket.h> #include <unistd.h> static int do_test (void) { /* Use a datagram socket to check that everything arrives in one packet. The dprintf function should perform a single write call. */ int fds[2]; TEST_VERIFY_EXIT (socketpair (AF_LOCAL, SOCK_DGRAM, 0, fds) == 0); TEST_COMPARE (dprintf (fds[0], "(%d)%s[%d]", 123, "---", 4567), 14); char buf[32]; ssize_t ret = read (fds[1], buf, sizeof (buf)); TEST_VERIFY_EXIT (ret > 0); TEST_COMPARE_BLOB (buf, ret, "(123)---[4567]", strlen ("(123)---[4567]")); close (fds[1]); close (fds[0]); return 0; } #include <support/test-driver.c>