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46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* Test that dprintf returns the expected length.
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Copyright (C) 2023-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <string.h>
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#include <support/check.h>
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#include <sys/socket.h>
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#include <unistd.h>
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static int
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do_test (void)
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{
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/* Use a datagram socket to check that everything arrives in one packet.
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The dprintf function should perform a single write call. */
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int fds[2];
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TEST_VERIFY_EXIT (socketpair (AF_LOCAL, SOCK_DGRAM, 0, fds) == 0);
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TEST_COMPARE (dprintf (fds[0], "(%d)%s[%d]", 123, "---", 4567), 14);
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char buf[32];
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ssize_t ret = read (fds[1], buf, sizeof (buf));
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TEST_VERIFY_EXIT (ret > 0);
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TEST_COMPARE_BLOB (buf, ret, "(123)---[4567]", strlen ("(123)---[4567]"));
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close (fds[1]);
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close (fds[0]);
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return 0;
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}
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#include <support/test-driver.c>
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