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More POSIX stream corner cases.

Browse Source 
* libc/stdio/findfp.c (__sinit): Open stderr read/write.
* libc/stdio/fdopen.c (_fdopen_r): Set O_APPEND on fd when
requested.
* libc/stdio64/fdopen64.c (_fdopen64_r): Likewise.
This commit is contained in:
Eric Blake 2007-07-31 20:49:40 +00:00
parent 8b5fa210a6
commit f7c978d50f
4 changed files with 30 additions and 23 deletions
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8
newlib/ChangeLog
View File

@ -1,3 +1,11 @@
2007-07-31 Eric Blake <ebb9@byu.net>
More POSIX stream corner cases.
* libc/stdio/findfp.c (__sinit): Open stderr read/write.
* libc/stdio/fdopen.c (_fdopen_r): Set O_APPEND on fd when
requested.
* libc/stdio64/fdopen64.c (_fdopen64_r): Likewise.
2007-07-18 Eric Blake <ebb9@byu.net>
Fix 'make info'.

15
newlib/libc/stdio/fdopen.c
View File

@ -96,17 +96,14 @@ _DEFUN(_fdopen_r, (ptr, fd, mode),
_flockfile (fp);
fp->_flags = flags;
/*
* If opened for appending, but underlying descriptor
* does not have O_APPEND bit set, assert __SAPP so that
* __swrite() will lseek to end before each write.
*/
if ((oflags & O_APPEND)
/* POSIX recommends setting the O_APPEND bit on fd to match append
streams. Someone may later clear O_APPEND on fileno(fp), but the
stream must still remain in append mode. Rely on __sflags
setting __SAPP properly. */
#ifdef HAVE_FCNTL
&& !(fdflags & O_APPEND)
if ((oflags & O_APPEND) && !(fdflags & O_APPEND))
_fcntl_r (ptr, fd, F_SETFL, fdflags | O_APPEND);
#endif
)
fp->_flags |= __SAPP;
fp->_file = fd;
fp->_cookie = (_PTR) fp;

13
newlib/libc/stdio/findfp.c
View File

@ -204,16 +204,21 @@ _DEFUN(__sinit, (s),
std (s->_stdin, __SRD, 0, s);
/* on platforms that have true file system I/O, we can verify whether stdout
is an interactive terminal or not. For all other platforms, we will
default to line buffered mode here. */
/* 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 (s->_stdout, __SWR, 1, s);
#else
std (s->_stdout, __SWR | __SLBF, 1, s);
#endif
std (s->_stderr, __SWR | __SNBF, 2, s);
/* 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);
__sinit_lock_release ();
}

15
newlib/libc/stdio64/fdopen64.c
View File

@ -67,17 +67,14 @@ _DEFUN (_fdopen64_r, (ptr, fd, mode),
_flockfile(fp);
fp->_flags = flags;
/*
* If opened for appending, but underlying descriptor
* does not have O_APPEND bit set, assert __SAPP so that
* __swrite() will lseek to end before each write.
*/
if ((oflags & O_APPEND)
/* POSIX recommends setting the O_APPEND bit on fd to match append
streams. Someone may later clear O_APPEND on fileno(fp), but the
stream must still remain in append mode. Rely on __sflags
setting __SAPP properly. */
#ifdef HAVE_FCNTL
&& !(fdflags & O_APPEND)
if ((oflags & O_APPEND) && !(fdflags & O_APPEND))
_fcntl_r (ptr, fd, F_SETFL, fdflags | O_APPEND);
#endif
)
fp->_flags |= __SAPP;
fp->_file = fd;
fp->_cookie = (_PTR) fp;