mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 12:30:06 +00:00
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
|
/* Test feature wrapper for formatted 'dprintf' output.
|
||
|
|
Copyright (C) 2024 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 <errno.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
/* We need to go through the POSIX-mandated dance to switch between
|
||
|
|
handles on an open file description. */
|
||
|
|
|
||
|
|
#define printf_under_test(...) \
|
||
|
|
({ \
|
||
|
|
__label__ out; \
|
||
|
|
int result; \
|
||
|
|
\
|
||
|
|
result = fflush (stdout); \
|
||
|
|
if (result == EOF) \
|
||
|
|
{ \
|
||
|
|
perror ("fflush"); \
|
||
|
|
goto out; \
|
||
|
|
} \
|
||
|
|
result = lseek (STDOUT_FILENO, 0, SEEK_END); \
|
||
|
|
if (result < 0 && errno == ESPIPE) \
|
||
|
|
result = 0; \
|
||
|
|
if (result < 0) \
|
||
|
|
{ \
|
||
|
|
perror ("lseek"); \
|
||
|
|
goto out; \
|
||
|
|
} \
|
||
|
|
result = dprintf (STDOUT_FILENO, __VA_ARGS__); \
|
||
|
|
if (result < 0) \
|
||
|
|
{ \
|
||
|
|
perror ("dprintf"); \
|
||
|
|
goto out; \
|
||
|
|
} \
|
||
|
|
result = fseek (stdout, 0, SEEK_END); \
|
||
|
|
if (result < 0 && errno == ESPIPE) \
|
||
|
|
result = 0; \
|
||
|
|
if (result < 0) \
|
||
|
|
perror ("fseek"); \
|
||
|
|
out: \
|
||
|
|
result; \
|
||
|
|
})
|