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Add stdin_init(), stdout_init() and stderr_init()

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This simplifies further changes in this area.

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
This commit is contained in:
Sebastian Huber 2017-06-23 09:48:58 +02:00
parent b70c0bc706
commit 79cc9cb8f3
1 changed files with 33 additions and 17 deletions
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50
newlib/libc/stdio/findfp.c
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@ -84,6 +84,36 @@ _DEFUN(std, (ptr, flags, file),
#endif #endif
} }
static inline void
stdin_init(FILE *ptr)
{
std (ptr, __SRD, 0);
}
static inline void
stdout_init(FILE *ptr)
{
/* On platforms that have true file system I/O, we can verify
whether stdout is an interactive terminal or not, as part of
__smakebuf on first use of the stream. For all other platforms,
we will default to line buffered mode here. Technically, POSIX
requires both stdin and stdout to be line-buffered, but tradition
leaves stdin alone on systems without fcntl. */
#ifdef HAVE_FCNTL
std (ptr, __SWR, 1);
#else
std (ptr, __SWR | __SLBF, 1);
#endif
}
static inline void
stderr_init(FILE *ptr)
{
/* POSIX requires stderr to be opened for reading and writing, even
when the underlying fd 2 is write-only. */
std (ptr, __SRW | __SNBF, 2);
}
struct glue_with_file { struct glue_with_file {
struct _glue glue; struct _glue glue;
FILE file; FILE file;
@ -235,23 +265,9 @@ _DEFUN(__sinit, (s),
s->_stderr = __sfp(s); s->_stderr = __sfp(s);
#endif #endif
std (s->_stdin, __SRD, 0); stdin_init (s->_stdin);
stdout_init (s->_stdout);
/* On platforms that have true file system I/O, we can verify stderr_init (s->_stderr);
whether stdout is an interactive terminal or not, as part of
__smakebuf on first use of the stream. For all other platforms,
we will default to line buffered mode here. Technically, POSIX
requires both stdin and stdout to be line-buffered, but tradition
leaves stdin alone on systems without fcntl. */
#ifdef HAVE_FCNTL
std (s->_stdout, __SWR, 1);
#else
std (s->_stdout, __SWR | __SLBF, 1);
#endif
/* POSIX requires stderr to be opened for reading and writing, even
when the underlying fd 2 is write-only. */
std (s->_stderr, __SRW | __SNBF, 2);
s->__sdidinit = 1; s->__sdidinit = 1;