mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-03 04:01:43 +08:00
f5c65fa920
The __printf_buffer_flush_dprintf function needs to record that
the buffer has been written before reusing it. Without this
accounting, dprintf always returns zero.
Fixes commit 8ece45e4f5
("libio: Convert __vdprintf_internal to buffers").
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* Test that dprintf returns the expected length.
|
|
Copyright (C) 2023 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>
|