Deal with cvs "feature"... or is that cvs _user_...

1 files changed, 3171 insertions, 0 deletions

diff --git a/libc/stdio/stdio.c b/libc/stdio/stdio.c
new file mode 100644
index 000000000..01e0e35e9
--- /dev/null
+++ b/libc/stdio/stdio.c
@@ -0,0 +1,3171 @@
+/*  Copyright (C) 2002     Manuel Novoa III
+ *  My stdio library for linux and (soon) elks.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with this library; if not, write to the Free
+ *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*  ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!
+ *
+ *  This code is currently under development.  Also, I plan to port
+ *  it to elks which is a 16-bit environment with a fairly limited
+ *  compiler.  Therefore, please refrain from modifying this code
+ *  and, instead, pass any bug-fixes, etc. to me.  Thanks.  Manuel
+ *
+ *  ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION! */
+
+#define _ISOC99_SOURCE			/* for ULLONG primarily... */
+#define _GNU_SOURCE
+#define _STDIO_UTILITY			/* for _stdio_fdout and _uintmaxtostr. */
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdio_ext.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+/**********************************************************************/
+/* First deal with some build issues... */
+
+#ifndef __STDIO_THREADSAFE
+/* Just build empty object files if any of these were defined. */
+/* Note though that we do keep the various *_unlocked names as aliases. */
+#undef L___fsetlocking
+#undef L___flockfile
+#undef L___ftrylockfile
+#undef L___funlockfile
+#endif
+
+#ifndef __STDIO_LARGE_FILES
+/* Just build empty object files if any of these were defined. */
+#undef L_fopen64
+#undef L_freopen64
+#undef L_ftello64
+#undef L_fseeko64
+#undef L_fsetpos64
+#undef L_fgetpos64
+#endif
+
+/**********************************************************************/
+
+/* TODO -- make this the default except for bcc with it's broken preproc? */
+#ifdef __UCLIBC__
+#define _stdin stdin
+#define _stdout stdout
+#define _stderr stderr
+#endif /* __UCLIBC__ */
+
+/**********************************************************************/
+
+#ifndef __STDIO_THREADSAFE
+
+#define UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,STREAM) \
+strong_alias(NAME,NAME##_unlocked) \
+RETURNTYPE NAME PARAMS
+
+#define UNLOCKED(RETURNTYPE,NAME,PARAMS,ARGS) \
+	UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,stream)
+
+#define UNLOCKED_VOID_RETURN(NAME,PARAMS,ARGS) \
+strong_alias(NAME,NAME##_unlocked) \
+void NAME PARAMS
+
+#define __STDIO_THREADLOCK_OPENLIST
+#define __STDIO_THREADUNLOCK_OPENLIST
+
+#else  /* __STDIO_THREADSAFE */
+
+#include <pthread.h>
+
+#define UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,STREAM) \
+RETURNTYPE NAME PARAMS \
+{ \
+	RETURNTYPE retval; \
+	__STDIO_THREADLOCK(STREAM); \
+	retval = NAME##_unlocked ARGS ; \
+	__STDIO_THREADUNLOCK(STREAM); \
+	return retval; \
+} \
+RETURNTYPE NAME##_unlocked PARAMS
+
+#define UNLOCKED(RETURNTYPE,NAME,PARAMS,ARGS) \
+	UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,stream)
+
+#define UNLOCKED_VOID_RETURN(NAME,PARAMS,ARGS) \
+void NAME PARAMS \
+{ \
+	__STDIO_THREADLOCK(stream); \
+	NAME##_unlocked ARGS ; \
+	__STDIO_THREADUNLOCK(stream); \
+} \
+void NAME##_unlocked PARAMS
+
+#define __STDIO_THREADLOCK_OPENLIST \
+	pthread_mutex_lock(&_stdio_openlist_lock)
+
+#define __STDIO_THREADUNLOCK_OPENLIST \
+	pthread_mutex_unlock(&_stdio_openlist_lock)
+
+#define __STDIO_THREADTRYLOCK_OPENLIST \
+	pthread_mutex_trylock(&_stdio_openlist_lock)
+
+#endif /* __STDIO_THREADSAFE */
+
+/**********************************************************************/
+
+#ifdef __STDIO_WIDE
+#define __STDIO_FILE_INIT_UNGOT		{ 0, 0 }, { 0, 0 },
+#else
+#define __STDIO_FILE_INIT_UNGOT		{ 0, 0 },
+#endif
+
+#ifdef __STDIO_GETC_MACRO
+#define __STDIO_FILE_INIT_BUFGETC(x) x,
+#else
+#define __STDIO_FILE_INIT_BUFGETC(x)
+#endif
+
+#ifdef __STDIO_PUTC_MACRO
+#define __STDIO_FILE_INIT_BUFPUTC(x) x,
+#else
+#define __STDIO_FILE_INIT_BUFPUTC(x)
+#endif
+
+#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
+#define __STDIO_FILE_INIT_NEXT(next)	(next),
+#else  /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
+#define __STDIO_FILE_INIT_NEXT(next)
+#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
+
+#ifdef __STDIO_BUFFERS
+#define __STDIO_FILE_INIT_BUFFERS(buf,bufsize) \
+	(buf), (buf)+(bufsize), (buf), (buf),
+#else
+#define __STDIO_FILE_INIT_BUFFERS(buf,bufsize)
+#endif
+
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+#define __STDIO_FILE_INIT_CUSTOM_STREAM(stream) \
+	&((stream).filedes), { _cs_read, _cs_write, NULL, _cs_close },
+#else
+#define __STDIO_FILE_INIT_CUSTOM_STREAM(stream)
+#endif
+
+#ifdef __STDIO_THREADSAFE
+#define __STDIO_FILE_INIT_THREADSAFE \
+	0, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP,
+#else
+#define __STDIO_FILE_INIT_THREADSAFE
+#endif
+
+#define __STDIO_INIT_FILE_STRUCT(stream, flags, filedes, next, buf, bufsize) \
+	{ (flags), \
+	__STDIO_FILE_INIT_UNGOT \
+	(filedes), \
+	__STDIO_FILE_INIT_NEXT(next) \
+	__STDIO_FILE_INIT_BUFFERS(buf,bufsize) \
+	__STDIO_FILE_INIT_BUFGETC((buf)) \
+	__STDIO_FILE_INIT_BUFPUTC((buf)) \
+	__STDIO_FILE_INIT_CUSTOM_STREAM(stream) \
+	__STDIO_FILE_INIT_THREADSAFE \
+} /* TODO: mbstate and builtin buf */
+
+#ifdef __STDIO_MBSTATE_DATA
+extern void _init_mbstate(mbstate_t *dest);
+
+#define __COMMA_CLEAN_MBSTATE        , 0
+#define __COPY_MBSTATE(dest,src)  memcpy(dest, src, sizeof(mbstate_t))
+#define __INIT_MBSTATE(dest) _init_mbstate(dest)
+#else
+#define __COMMA_CLEAN_MBSTATE
+#define __COPY_MBSTATE(dest,src)
+#define __INIT_MBSTATE(dest)
+#endif
+
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+
+/* TODO -- what does glibc do for undefined funcs?  errno set? */
+#define __READ(STREAMPTR,BUF,SIZE) \
+	((((STREAMPTR)->gcs.read) == NULL) ? -1 : \
+	(((STREAMPTR)->gcs.read)((STREAMPTR)->cookie,(BUF),(SIZE))))
+#define __WRITE(STREAMPTR,BUF,SIZE) \
+	((((STREAMPTR)->gcs.write) == NULL) ? -1 : \
+	(((STREAMPTR)->gcs.write)((STREAMPTR)->cookie,(BUF),(SIZE))))
+#define __CLOSE(STREAMPTR) \
+	((((STREAMPTR)->gcs.close) == NULL) ? 0 : \
+	(((STREAMPTR)->gcs.close)((STREAMPTR)->cookie)))
+
+#else  /* __STDIO_GLIBC_CUSTOM_STREAMS */
+
+#define __READ(STREAMPTR,BUF,SIZE) \
+	(read((STREAMPTR)->filedes,(BUF),(SIZE)))
+#define __WRITE(STREAMPTR,BUF,SIZE) \
+	(write((STREAMPTR)->filedes,(BUF),(SIZE)))
+#define __CLOSE(STREAMPTR) \
+	(close((STREAMPTR)->filedes))
+
+#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
+
+/**********************************************************************/
+/* POSIX functions */
+/**********************************************************************/
+#ifdef L_getw
+
+/* SUSv2 Legacy function -- need not be reentrant. */
+
+int getw (register FILE *stream)
+{
+	int aw[1];
+
+#ifdef __STDIO_WIDE
+
+	return (fread((void *)aw, sizeof(int), 1, stream) > 0) ? (*aw) : EOF;
+
+#else  /* __STDIO_WIDE */
+
+	return (_stdio_fread((unsigned char *)(aw), sizeof(int), stream)
+			== sizeof(int)) ? (*aw) : EOF;
+
+#endif /* __STDIO_WIDE */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_putw
+
+/* SUSv2 Legacy function -- need not be reentrant. */
+
+int putw (int w, register FILE *stream)
+{
+	int aw[1];
+
+	*aw = w;					/* In case 'w' is in a register... */
+
+#ifdef __STDIO_WIDE
+
+	return (fwrite((void *)aw, sizeof(int), 1, stream) == 1) ? 0 : EOF;
+
+#else  /* __STDIO_WIDE */
+
+	return (_stdio_fwrite((unsigned char *)aw, sizeof(int), stream)
+			== sizeof(int)) ? 0 : EOF;
+
+#endif /* __STDIO_WIDE */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fileno
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(int,fileno,(register FILE *stream),(stream))
+{
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+	return ( ((stream->cookie == &(stream->filedes)) && (stream->filedes >= 0))
+			 ? stream->filedes
+			 : (__set_errno(EBADF), -1) );
+#else  /* __STDIO_GLIBC_CUSTOM_STREAMS */
+	return (stream->filedes >= 0) ? stream->filedes : (__set_errno(EBADF), -1);
+#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fdopen
+
+/* No reentrancy issues. */
+
+FILE *fdopen(int filedes, const char *mode)
+{
+	register char *cur_mode;	/* TODO -- replace by intptr_t?? */
+
+	return (((int)(cur_mode = (char *) fcntl(filedes, F_GETFL))) != -1)
+		? _stdio_fopen(cur_mode, mode, NULL, filedes) 
+		: NULL;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fopen64
+
+/* No reentrancy issues. */
+
+FILE *fopen64(const char * __restrict filename, const char * __restrict mode)
+{
+	return _stdio_fopen(filename, mode, NULL, -2);
+}
+
+#endif
+/**********************************************************************/
+/* BSD functions */
+/**********************************************************************/
+#ifdef L_setbuffer
+
+/* No reentrancy issues. */
+
+void setbuffer(FILE * __restrict stream, register char * __restrict buf,
+			   size_t size)
+{
+#ifdef __STDIO_BUFFERS
+	setvbuf(stream, buf, (buf ? _IOFBF : _IONBF), size);
+#else  /* __STDIO_BUFFERS */
+	/* Nothing to do. */
+#endif /* __STDIO_BUFFERS */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_setlinebuf
+
+/* No reentrancy issues. */
+
+void setlinebuf(FILE * __restrict stream)
+{
+#ifdef __STDIO_BUFFERS
+	setvbuf(stream, NULL, _IOLBF, (size_t) BUFSIZ);
+#else  /* __STDIO_BUFFERS */
+	/* Nothing to do. */
+#endif /* __STDIO_BUFFERS */
+}
+
+#endif
+/**********************************************************************/
+/* GLIBC functions */
+/**********************************************************************/
+#ifdef L_fcloseall
+
+/* NOTE: GLIBC difference!!! -- fcloseall
+ * According to the info pages, glibc actually fclose()s all open files.
+ * Apparently, glibc's new version only fflush()s and unbuffers all
+ * writing streams to cope with unordered destruction of c++ static
+ * objects.  Here we implement the old behavior as default.
+ */
+
+/* Not reentrant. */
+
+int fcloseall (void)
+{
+#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
+	register FILE *stream;
+	int rv;
+
+	_stdio_term();				/* Let _stdio_term() do all the work. */
+
+	rv = 0;
+	for (stream = _stdio_openlist ; stream ; stream = stream->nextopen) {
+		if (stream->modeflags & (__FLAG_WRITING|__FLAG_ERROR)) {
+			/* TODO -- is this correct?  Maybe ferror set before flush...
+			* could check if pending writable but what if term unbuffers?
+			* in that case, could clear error flag... */
+			rv = EOF;			/* Only care about failed writes. */
+		}
+	}
+
+	/* Make sure _stdio_term() does nothing on exit. */
+	_stdio_openlist = NULL;
+
+	return rv;
+#else  /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
+
+	return 0;
+
+#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fmemopen
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+
+typedef struct {
+	size_t pos;
+	size_t len;
+	size_t eof;
+	int dynbuf;
+	unsigned char *buf;
+	FILE *fp;
+} __fmo_cookie;
+
+#define COOKIE ((__fmo_cookie *) cookie)
+
+static ssize_t fmo_read(void *cookie, register char *buf, size_t bufsize)
+{
+	size_t count = COOKIE->len - COOKIE->pos;
+
+	/* Note: bufsize < SSIZE_MAX because of _stdio_READ. */
+
+	if (bufsize > count) {
+		bufsize = count;
+	}
+
+#if 1							/* TODO - choose code option */
+	memcpy(buf, COOKIE->buf + COOKIE->pos, bufsize);
+	COOKIE->pos += bufsize;
+#else
+	{
+		register char *p = COOKIE->buf + COOKIE->pos;
+
+		count = bufsize;
+		while (count) {
+			*buf++ = *p++;
+			--count;
+		}
+		COOKIE->pos += bufsize;
+	}
+#endif
+
+	return bufsize;
+}
+
+static ssize_t fmo_write(void *cookie, register const char *buf, size_t bufsize)
+{
+	size_t count;
+
+	/* Note: bufsize < SSIZE_MAX because of _stdio_WRITE. */
+
+	/* If appending, need to seek to end of file!!!! */
+	if (COOKIE->fp->modeflags & __FLAG_APPEND) {
+		COOKIE->pos = COOKIE->eof;
+	}
+
+	count = COOKIE->len - COOKIE->pos;
+
+	if (bufsize > count) {
+		bufsize = count;
+		if (count == 0) {		/* We're at the end of the buffer... */
+			errno = EFBIG;
+			return -1;
+		}
+	}
+
+#if 1							/* TODO - choose code option */
+	memcpy(COOKIE->buf + COOKIE->pos, buf, bufsize);
+	COOKIE->pos += bufsize;
+
+	if (COOKIE->pos > COOKIE->eof) {
+		COOKIE->eof = COOKIE->pos;
+		if (bufsize < count) {	/* New eof and still room in buffer? */
+			*(COOKIE->buf + COOKIE->pos) = 0;
+		}
+	}
+
+#else
+	{
+		register char *p = COOKIE->buf + COOKIE->pos;
+		size_t i = bufsize;
+
+		while (i > 0) {
+			*p++ = *buf++;
+			--i;
+		}
+		COOKIE->pos += bufsize;
+
+		if (COOKIE->pos > COOKIE->eof) {
+			COOKIE->eof = COOKIE->pos;
+			if (bufsize < count) {	/* New eof and still room in buffer? */
+				*p = 0;
+			}
+		}
+	}
+
+#endif
+
+	return bufsize;
+}
+
+/* glibc doesn't allow seeking, but it has in-buffer seeks... we don't. */
+static int fmo_seek(void *cookie, __offmax_t *pos, int whence)
+{
+	__offmax_t p = *pos;
+
+	/* Note: fseek already checks that whence is legal, so don't check here
+	 * unless debugging. */
+	assert(((unsigned int) whence) <= 2);
+
+	if (whence != SEEK_SET) {
+		p += (whence == SEEK_CUR) ? COOKIE->pos : /* SEEK_END */ COOKIE->eof;
+	}
+
+	/* Note: glibc only allows seeking in the buffer.  We'll actually restrict
+	 * to the data. */
+	/* Check for offset < 0, offset > eof, or offset overflow... */
+	if (((uintmax_t) p) > COOKIE->eof) {
+		return -1;
+	}
+
+	COOKIE->pos = *pos = p;
+	return 0;
+}
+
+static int fmo_close(void *cookie)
+{
+	if (COOKIE->dynbuf) {
+		free(COOKIE->buf);
+	}
+	free(cookie);
+	return 0;
+}
+
+#undef COOKIE
+
+static const cookie_io_functions_t _fmo_io_funcs = {
+	fmo_read, fmo_write, fmo_seek, fmo_close
+};
+
+/* TODO: If we have buffers enabled, it might be worthwile to add a pointer
+ * to the FILE in the cookie and have read, write, and seek operate directly
+ * on the buffer itself (ie replace the FILE buffer with the cookie buffer
+ * and update FILE bufstart, etc. whenever we seek). */
+
+FILE *fmemopen(void *s, size_t len, const char *modes)
+{
+	FILE *fp;
+	__fmo_cookie *cookie;
+	size_t i;
+
+	if ((cookie = malloc(sizeof(__fmo_cookie))) != NULL) {
+		cookie->len = len;
+		cookie->eof = cookie->pos = 0; /* pos and eof adjusted below. */
+		cookie->dynbuf = 0;
+		if (((cookie->buf = s) == NULL) && (len > 0)) {
+			if ((cookie->buf = malloc(len)) == NULL) {
+				goto EXIT_cookie;
+			}
+			cookie->dynbuf = 1;
+			*cookie->buf = 0;	/* If we're appending, treat as empty file. */
+		}
+		
+#ifndef __BCC__
+		fp = fopencookie(cookie, modes, _fmo_io_funcs);
+#else
+		fp = fopencookie(cookie, modes, &_fmo_io_funcs);
+#endif
+		/* Note: We don't need to worry about locking fp in the thread case
+		 * as the only possible access would be a close or flush with
+		 * nothing currently in the FILE's write buffer. */
+
+		if (fp != NULL) {
+			cookie->fp = fp;
+			if ((fp->modeflags & __FLAG_APPEND) && (len > 0)) {
+				for (i = 0 ; i < len ; i++) {
+					if (cookie->buf[i] == 0) {
+						break;
+					}
+				}
+				cookie->eof = cookie->pos = i; /* Adjust eof and pos. */
+			}
+			return fp;
+		}
+	}
+
+	if (!s) {
+		free(cookie->buf);
+	}
+ EXIT_cookie:
+	free(cookie);
+
+	return NULL;
+}
+
+#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
+#endif
+/**********************************************************************/
+#ifdef L_open_memstream
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+
+#define COOKIE ((__oms_cookie *) cookie)
+
+typedef struct {
+	char *buf;
+	size_t len;
+	size_t pos;
+	size_t eof;
+	char **bufloc;
+	size_t *sizeloc;
+} __oms_cookie;
+
+/* Nothing to do here, as memstreams are write-only. */
+/*  static ssize_t oms_read(void *cookie, char *buf, size_t bufsize) */
+/*  { */
+/*  } */
+
+static ssize_t oms_write(void *cookie, const char *buf, size_t bufsize)
+{
+	char *newbuf;
+	size_t count;
+
+	/* Note: we already know bufsize < SSIZE_MAX... */
+
+	count = COOKIE->len - COOKIE->pos - 1;
+	assert(COOKIE->pos < COOKIE->len); /* Always nul-terminate! */
+
+	if (bufsize > count) {
+		newbuf = realloc(COOKIE->buf, COOKIE->len + bufsize - count);
+		if (newbuf) {
+			*COOKIE->bufloc = COOKIE->buf = newbuf;
+			COOKIE->len += (bufsize - count);
+		} else {
+			bufsize = count;
+			if (count == 0) {
+				errno = EFBIG;	/* TODO: check glibc errno setting... */
+				return -1;
+			}
+		}
+	}
+
+	memcpy(COOKIE->buf + COOKIE->pos, buf, bufsize);
+	COOKIE->pos += bufsize;
+
+	if (COOKIE->pos > COOKIE->eof) {
+		*COOKIE->sizeloc = COOKIE->eof = COOKIE->pos;
+	}
+
+	return bufsize;
+}
+
+static int oms_seek(void *cookie, __offmax_t *pos, int whence)
+{
+	__offmax_t p = *pos;
+	char *buf;
+	size_t leastlen;
+
+	/* Note: fseek already checks that whence is legal, so don't check here
+	 * unless debugging. */
+	assert(((unsigned int) whence) <= 2);
+
+	if (whence != SEEK_SET) {
+		p += (whence == SEEK_CUR) ? COOKIE->pos : /* SEEK_END */ COOKIE->eof;
+	}
+
+	/* Note: glibc only allows seeking in the buffer.  We'll actually restrict
+	 * to the data. */
+	/* Check for offset < 0, offset >= too big (need nul), or overflow... */
+	if (((uintmax_t) p) >= SIZE_MAX - 1) {
+		return -1;
+	}
+
+	leastlen = ((size_t) p) + 1; /* New pos + 1 for nul if necessary. */
+
+	if (leastlen >= COOKIE->len) { /* Need to grow buffer... */
+		buf = realloc(COOKIE->buf, leastlen);
+		if (buf) {
+			*COOKIE->bufloc = COOKIE->buf = buf;
+			COOKIE->len = leastlen;
+			memset(buf + COOKIE->eof, leastlen - COOKIE->eof, 0); /* 0-fill */
+		} else {
+			/* TODO: check glibc errno setting... */
+			return -1;
+		}
+	}
+
+	*pos = COOKIE->pos = --leastlen;
+
+	if (leastlen > COOKIE->eof) {
+		memset(COOKIE->buf + COOKIE->eof, leastlen - COOKIE->eof, 0);
+		*COOKIE->sizeloc = COOKIE->eof;
+	}
+
+	return 0;
+}
+
+static int oms_close(void *cookie)
+{
+	free(cookie);
+	return 0;
+}
+
+#undef COOKIE
+
+static const cookie_io_functions_t _oms_io_funcs = {
+	NULL, oms_write, oms_seek, oms_close
+};
+
+/* TODO: If we have buffers enabled, it might be worthwile to add a pointer
+ * to the FILE in the cookie and operate directly on the buffer itself
+ * (ie replace the FILE buffer with the cookie buffer and update FILE bufstart,
+ * etc. whenever we seek). */
+
+FILE *open_memstream(char **__restrict bufloc, size_t *__restrict sizeloc)
+{
+	__oms_cookie *cookie;
+	FILE *fp;
+
+	if ((cookie = malloc(sizeof(__oms_cookie))) != NULL) {
+		if ((cookie->buf = malloc(cookie->len = BUFSIZ)) == NULL) {
+			goto EXIT_cookie;
+		}
+		*cookie->buf = 0;		/* Set nul terminator for buffer. */
+		*(cookie->bufloc = bufloc) = cookie->buf;
+		*(cookie->sizeloc = sizeloc) = cookie->eof = cookie->pos = 0;
+		
+#ifndef __BCC__
+		fp = fopencookie(cookie, "w", _oms_io_funcs);
+#else
+		fp = fopencookie(cookie, "w", &_oms_io_funcs);
+#endif
+		/* Note: We don't need to worry about locking fp in the thread case
+		 * as the only possible access would be a close or flush with
+		 * nothing currently in the FILE's write buffer. */
+
+		if (fp != NULL) {
+			return fp;
+		}
+	}
+
+	if (cookie->buf != NULL) {
+		free(cookie->buf);
+	}
+ EXIT_cookie:
+	free(cookie);
+
+	return NULL;
+}
+
+#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
+#endif
+/**********************************************************************/
+#ifdef L_fopencookie
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+
+/* NOTE: GLIBC difference!!! -- fopencookie
+ * According to the info pages, glibc allows seeking within buffers even if
+ * no seek function is supplied.  We don't. */
+
+/* NOTE: GLIBC difference!!! -- fopencookie
+ * When compiled without large file support, the offset pointer for the
+ * cookie_seek function is off_t * and not off64_t * as for glibc. */
+
+/* TODO: rewrite _stdio_fopen() to avoid the fopencookie() kludge. */
+
+/* Currently no real reentrancy issues other than a possible double close(). */
+
+#ifndef __BCC__
+
+FILE *fopencookie (void * __restrict cookie, const char * __restrict mode,
+					cookie_io_functions_t io_functions)
+{
+	FILE *stream;
+	int fd;
+
+	if ((stream = _stdio_fopen("/dev/null", mode, NULL, -1)) != NULL) {
+		fd = stream->filedes;
+		stream->filedes = -1;
+		close(fd);
+		stream->gcs = io_functions;
+		stream->cookie = cookie;
+	}
+
+#if !defined(__STDIO_BUFFERS) && !defined(__STDIO_THREADSAFE)
+	/* I we don't have buffers or threads, we only need to worry about
+	 * custom streams on the open list, as no flushing is necessary and
+	 * no locking of possible underlying normal streams need be done.
+	 * We do need to explicitly close custom streams on termination of stdio,
+	 * and we need to lock the list as it can be modified by fclose(). */
+	__STDIO_THREADLOCK_OPENLIST;
+	stream->nextopen = _stdio_openlist;	/* New files are inserted at */
+	_stdio_openlist = stream;			/*   the head of the list. */
+	__STDIO_THREADUNLOCK_OPENLIST;
+#endif /* !defined(__STDIO_BUFFERS) && !defined(__STDIO_THREADSAFE) */
+
+	return stream;
+}
+
+#else  /* __BCC__ */
+
+/* NOTE: GLIBC difference!!! -- fopencookie (bcc only)
+ * Since bcc doesn't support passing of structs, we define fopencookie as a
+ * macro in terms of _fopencookie which takes a struct * for the io functions
+ * instead.
+ */
+
+FILE *_fopencookie (void * __restrict cookie, const char * __restrict mode,
+					cookie_io_functions_t *io_functions)
+{
+	FILE *stream;
+
+	if ((stream = _stdio_fopen("/dev/null", mode, NULL, -1)) != NULL) {
+		int fd = stream->filedes;
+		stream->filedes = -1;
+		close(fd);
+		stream->gcs.read  = io_functions->read;
+		stream->gcs.write = io_functions->write;
+		stream->gcs.seek  = io_functions->seek;
+		stream->gcs.close = io_functions->close;
+		stream->cookie = cookie;
+	}
+
+#if !defined(__STDIO_BUFFERS) && !defined(__STDIO_THREADSAFE)
+	/* I we don't have buffers or threads, we only need to worry about
+	 * custom streams on the open list, as no flushing is necessary and
+	 * no locking of possible underlying normal streams need be done.
+	 * We do need to explicitly close custom streams on termination of stdio,
+	 * and we need to lock the list as it can be modified by fclose(). */
+	__STDIO_THREADLOCK_OPENLIST;
+	stream->nextopen = _stdio_openlist;	/* New files are inserted at */
+	_stdio_openlist = stream;			/*   the head of the list. */
+	__STDIO_THREADUNLOCK_OPENLIST;
+#endif /* !defined(__STDIO_BUFFERS) && !defined(__STDIO_THREADSAFE) */
+
+	return stream;
+}
+
+#endif  /* __BCC__ */
+
+#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
+#endif
+/**********************************************************************/
+#ifdef L___fbufsize
+
+/* Not reentrant. */
+
+size_t __fbufsize(register FILE * __restrict stream)
+{
+#ifdef __STDIO_BUFFERS
+	return (stream->modeflags & __FLAG_NBF)
+		? 0 : (stream->bufend - stream->bufstart);
+#else  /* __STDIO_BUFFERS */
+	return 0;
+#endif /* __STDIO_BUFFERS */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L___freading
+
+/* No reentrancy issues. */
+
+int __freading(FILE * __restrict stream)
+{
+	return stream->modeflags & (__FLAG_READING|__FLAG_READONLY);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L___fwriting
+
+/* No reentrancy issues. */
+
+int __fwriting(FILE * __restrict stream)
+{
+	return stream->modeflags & (__FLAG_WRITING|__FLAG_WRITEONLY);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L___freadable
+
+/* No reentrancy issues. */
+
+int __freadable(FILE * __restrict stream)
+{
+	return ~(stream->modeflags & __FLAG_WRITEONLY);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L___fwritable
+
+/* No reentrancy issues. */
+
+int __fwritable(FILE * __restrict stream)
+{
+	return ~(stream->modeflags & __FLAG_READONLY);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L___flbf
+
+/* No reentrancy issues. */
+
+int __flbf(FILE * __restrict stream)
+{
+#ifdef __STDIO_BUFFERS
+	return (stream->modeflags & __FLAG_LBF);
+#else  /* __STDIO_BUFFERS */
+	/* TODO -- Even though there is no buffer, return flag setting? */
+	return __FLAG_NBF;
+#endif /* __STDIO_BUFFERS */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L___fpurge
+
+/* Not reentrant. */
+
+void __fpurge(register FILE * __restrict stream)
+{
+#ifdef __STDIO_BUFFERS
+#ifdef __STDIO_PUTC_MACRO
+	stream->bufputc =			/* Must disable putc. */
+#endif /* __STDIO_PUTC_MACRO */
+#ifdef __STDIO_GETC_MACRO
+	stream->bufgetc =			/* Must disable getc. */
+#endif
+	stream->bufwpos = stream->bufrpos = stream->bufstart; /* Reset pointers. */
+#endif /* __STDIO_BUFFERS */
+	/* Reset r/w flags and clear ungots. */
+	stream->modeflags &= ~(__FLAG_READING|__FLAG_WRITING|__MASK_UNGOT);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L___fpending
+
+/* Not reentrant. */
+
+#ifdef __STDIO_WIDE
+#warning TODO  -- implement __fpending for wide streams! */
+#else  /* __STDIO_WIDE */
+size_t __fpending(register FILE * __restrict stream)
+{
+#ifdef __STDIO_BUFFERS
+	/* TODO -- should we check this?  should we set errno?  just assert? */
+	return (stream->modeflags & (__FLAG_READING|__FLAG_READONLY))
+		? 0 : (stream->bufwpos - stream->bufstart);
+#else  /* __STDIO_BUFFERS */
+	return 0;
+#endif /* __STDIO_BUFFERS */
+}
+#endif /* __STDIO_WIDE */
+
+#endif
+/**********************************************************************/
+#ifdef L__flushlbf
+
+/* No reentrancy issues. */
+
+void _flushlbf(void)
+{
+#ifdef __STDIO_BUFFERS
+	fflush((FILE *) &_stdio_openlist); /* Uses an implementation hack!!! */
+#else  /* __STDIO_BUFFERS */
+	/* Nothing to do. */
+#endif /* __STDIO_BUFFERS */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L___fsetlocking
+
+/* No (serious) reentrancy issues -- return value could be incorrect. */
+/* TODO -- fix race */
+
+int __fsetlocking(FILE *stream, int locking_mode)
+{
+	int old_mode;
+
+	assert((FSETLOCKING_QUERY == 0) && (FSETLOCKING_INTERNAL == 1)
+		   && (FSETLOCKING_BYCALLER == 2));
+
+	assert(((unsigned int) locking_mode) <= 2);
+
+	/* Note: don't even bother locking here... */
+
+	old_mode  = stream->user_locking;
+
+	if (locking_mode != FSETLOCKING_QUERY) {
+		/* In case we're not debugging, treat any unknown as a request to
+		 * set internal locking, in order to match glibc behavior. */
+		stream->user_locking = ((locking_mode == FSETLOCKING_BYCALLER)
+								? FSETLOCKING_BYCALLER
+								: FSETLOCKING_INTERNAL);
+	}
+
+	return old_mode;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_flockfile
+
+void flockfile(FILE *stream)
+{
+	pthread_mutex_lock(&stream->lock);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_ftrylockfile
+
+int ftrylockfile(FILE *stream)
+{
+	return pthread_mutex_trylock(&stream->lock);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_funlockfile
+
+void funlockfile(FILE *stream)
+{
+	pthread_mutex_unlock(&stream->lock);
+}
+
+#endif
+/**********************************************************************/
+/* my extension functions */
+/**********************************************************************/
+#ifdef L__stdio_fsfopen
+/*
+ * Stack|Static File open -- open a file where the FILE is either
+ * stack or staticly allocated.
+ */
+
+/* No reentrancy issues. */
+
+FILE *_stdio_fsfopen(const char * __restrict filename,
+					 const char * __restrict mode,
+					 register FILE * __restrict stream)
+{
+#ifdef __STDIO_BUFFERS
+	stream->modeflags = __FLAG_FBF;
+#if __STDIO_BUILTIN_BUF_SIZE > 0
+	stream->bufstart = stream->builtinbuf;
+	stream->bufend = stream->builtinbuf + sizeof(stream->builtinbuf);
+#else  /* __STDIO_BUILTIN_BUF_SIZE > 0 */
+	stream->bufend = stream->bufstart = NULL;
+#endif /* __STDIO_BUILTIN_BUF_SIZE > 0 */
+#endif /* __STDIO_BUFFERS */
+
+	return _stdio_fopen(filename, mode, stream, -1);
+}
+#endif
+/**********************************************************************/
+/* stdio internal functions */
+/**********************************************************************/
+#ifdef L__stdio_adjpos
+/*
+ * ANSI/ISO p. 370: The file positioning indicator is unspecified after
+ * a successful call to ungetwc.
+ * Note however, that this applies only to _user_ calls to ungetwc.  We
+ * need to allow for internal calls by scanf.  So we store the byte count
+ * of the first ungot wide char in ungot0_bytes.  If it is 0 (user case)
+ * then the file position is treated as unknown.
+ */
+
+
+/* Internal function -- not reentrant. */
+
+int _stdio_adjpos(register FILE * __restrict stream,
+					register __offmax_t *pos)
+{
+	__offmax_t r;
+	int cor = stream->modeflags & __MASK_UNGOT;	/* handle ungots */
+
+#ifdef __STDIO_WIDE
+	/* Assumed narrow stream so correct if wide. */
+	if (cor && (stream->modeflags & __FLAG_WIDE)) {
+		cor = cor - 1 + stream->ungot_width[0];
+		if ((stream->ungot_width[0] == 0) /* don't know byte count or */
+			|| ((stream->modeflags & __MASK_UNGOT) > 1)) { /* app case */
+			return -1;
+		}
+	}
+#endif /* __STDIO_WIDE */
+#ifdef __STDIO_BUFFERS
+	if (stream->modeflags & __FLAG_WRITING) {
+		cor -= (stream->bufwpos - stream->bufstart); /* pending writes */
+	}
+	if (stream->modeflags & __FLAG_READING) {
+		cor += (stream->bufwpos - stream->bufrpos); /* extra's read */
+	}
+#endif /* __STDIO_BUFFERS */
+
+	r = *pos;
+	return ((*pos -= cor) > r) ? -cor : cor;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L__stdio_lseek
+/*
+ * This function is only called by fseek and ftell.
+ * fseek -- doesn't care about pos val, just success or failure.
+ * ftell -- needs pos val but offset == 0 and whence == SET_CUR.
+ */
+
+/* Internal function -- not reentrant. */
+
+int _stdio_lseek(FILE *stream, __offmax_t *pos, int whence)
+{
+	__offmax_t res;
+
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+	if (stream->cookie != &stream->filedes) {
+		return (((stream->gcs.seek == NULL)
+				 || ((stream->gcs.seek)(stream->cookie, pos, whence) < 0))
+				? -1 : 0);
+	}
+#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
+#ifdef __STDIO_LARGE_FILES
+	res = lseek64(stream->filedes, *pos, whence);
+#else
+	res = lseek(stream->filedes, *pos, whence);
+#endif /* __STDIO_LARGE_FILES */
+	return (res >= 0) ? ((*pos = res), 0) : -1;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L__stdio_fread
+/*
+ * NOTE!!! This routine is meant to be callable by both narrow and wide
+ * functions.  However, if called by a wide function, there must be
+ * NO pending ungetwc()s!!!
+ */
+
+/* Unlike write, it's ok for read to return fewer than bufsize, since
+ * we may not need all of them. */
+static ssize_t _stdio_READ(FILE *stream, void *buf, size_t bufsize)
+{
+	ssize_t rv;
+
+	if (bufsize == 0) {
+		return 0;
+	}
+
+	if (bufsize > SSIZE_MAX) {
+		bufsize = SSIZE_MAX;
+	}
+
+#ifdef __BCC__
+ TRY_READ:
+#endif
+	rv = __READ(stream, buf, bufsize);
+	if (rv > 0) {
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+		assert(rv <= bufsize);	/* buggy user handler... TODO: check? */
+		if (rv > bufsize) {	/* Num reported written > number requested */
+			rv = bufsize;		/* Treat as a full read??? */
+		}
+#endif
+	} else if (rv == 0) {
+		stream->modeflags |= __FLAG_EOF;
+	} else {
+#ifdef __BCC__
+		if (errno == EINTR) {
+			goto TRY_READ;
+		}
+#endif
+		stream->modeflags |= __FLAG_ERROR;
+		rv = 0;
+	}
+
+	return rv;
+}
+
+/* Internal function -- not reentrant. */
+
+size_t _stdio_fread(unsigned char *buffer, size_t bytes,
+					  register FILE *stream)
+{
+	__stdio_validate_FILE(stream); /* debugging only */
+
+#ifdef __STDIO_BUFFERS
+
+	if (stream->modeflags 
+#ifdef __STDIO_AUTO_RW_TRANSITION
+		& (__FLAG_WRITEONLY)
+#else  /* __STDIO_AUTO_RW_TRANSITION */
+		/* ANSI/ISO and SUSv3 require not currently writing. */
+		& (__FLAG_WRITEONLY|__FLAG_WRITING)
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+		) {
+#ifdef __STDIO_PUTC_MACRO
+		stream->bufputc = stream->bufstart;	/* Must disable putc. */
+#endif /* __STDIO_PUTC_MACRO */
+		stream->modeflags |= __FLAG_ERROR;
+		/* TODO: This is for posix behavior if writeonly.  To save space, we
+		 * use this errno for read attempt while writing, as no errno is
+		 * specified by posix for this case, even though the restriction is
+		 * mentioned in fopen(). */
+		errno = EBADF;
+		return 0;
+	}
+
+	/* We need to disable putc and getc macros in case of error */
+#if defined(__STDIO_PUTC_MACRO) || defined(__STDIO_GETC_MACRO)
+#ifdef __STDIO_PUTC_MACRO
+	stream->bufputc =
+#endif /* __STDIO_GETC_MACRO */
+#ifdef __STDIO_GETC_MACRO
+	stream->bufgetc =
+#endif /* __STDIO_GETC_MACRO */
+	stream->bufstart;
+#endif /*  defined(__STDIO_PUTC_MACRO) || defined(__STDIO_GETC_MACRO) */
+
+	if (stream->modeflags & __MASK_BUFMODE) {
+		/* If the stream is readable and not fully buffered, we must first
+		 * flush all line buffered output streams.  Do this before the
+		 * error check as this may be a read/write line-buffered stream. */
+		fflush((FILE *) &_stdio_openlist); /* Uses an implementation hack!!! */
+	}
+
+#ifdef __STDIO_AUTO_RW_TRANSITION
+	if (stream->modeflags & __FLAG_WRITING) {
+		/* TODO -- return if error?  Test glibc behavior with a custom r/w. */
+		fflush(stream);
+	}
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+
+	stream->modeflags |= __FLAG_READING; /* Make sure Reading flag is set. */
+
+	{
+		register unsigned char *p = (unsigned char *) buffer;
+
+		/* First, grab appropriate ungetc() chars.  NOT FOR WIDE ORIENTATED! */
+		while (bytes && (stream->modeflags & __MASK_UNGOT)) {
+#ifdef __STDIO_WIDE
+			assert(stream->modeflags & __FLAG_NARROW);
+#endif /* __STDIO_WIDE */
+			*p++ = stream->ungot[(--stream->modeflags) & __MASK_UNGOT];
+			stream->ungot[1] = 0;
+			--bytes;
+		}
+
+		/* Now get any other needed chars from the buffer or the file. */
+	FROM_BUF:
+		while (bytes && (stream->bufrpos < stream->bufwpos)) {
+			--bytes;
+			*p++ = *stream->bufrpos++;
+		}
+
+		if (bytes > 0) {
+			ssize_t len;
+
+			/* The buffer is exhausted, but we still need chars.  */
+			stream->bufrpos = stream->bufwpos = stream->bufstart;
+
+			if (bytes <= stream->bufend - stream->bufwpos) {
+				/* We have sufficient space in the buffer. */
+				len = _stdio_READ(stream, stream->bufwpos,
+								  stream->bufend - stream->bufwpos);
+				if (len > 0) {
+					stream->bufwpos += len;
+					goto FROM_BUF;
+				}
+			} else {
+				/* More bytes needed than fit in the buffer, so read */
+				/* directly into caller's buffer. */
+				len = _stdio_READ(stream, p, bytes);
+				if (len > 0) {
+					p += len;
+					bytes -= len;
+					goto FROM_BUF; /* Redundant work, but stops extra read. */
+				}
+			}
+		}
+
+#ifdef __STDIO_GETC_MACRO
+		if (!(stream->modeflags & (__FLAG_WIDE|__MASK_UNGOT|__MASK_BUFMODE))) {
+			stream->bufgetc = stream->bufwpos; /* Enable getc macro. */
+		}
+#endif
+
+		__stdio_validate_FILE(stream); /* debugging only */
+		return (p - (unsigned char *)buffer);
+	}
+
+#else  /* __STDIO_BUFFERS --------------------------------------- */
+
+	if (stream->modeflags 
+#ifdef __STDIO_AUTO_RW_TRANSITION
+		& (__FLAG_WRITEONLY)
+#else  /* __STDIO_AUTO_RW_TRANSITION */
+		/* ANSI/ISO and SUSv3 require not currently writing. */
+		& (__FLAG_WRITEONLY|__FLAG_WRITING)
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+		) {
+		stream->modeflags |= __FLAG_ERROR;
+		/* TODO: This is for posix behavior if writeonly.  To save space, we
+		 * use this errno for read attempt while writing, as no errno is
+		 * specified by posix for this case, even though the restriction is
+		 * mentioned in fopen(). */
+		errno = EBADF;
+		return 0;
+	}
+
+#ifdef __STDIO_AUTO_RW_TRANSITION
+	stream->modeflags &= ~(__FLAG_WRITING);	/* Make sure Writing flag clear. */
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+
+	stream->modeflags |= __FLAG_READING; /* Make sure Reading flag is set. */
+
+	{
+		register unsigned char *p = (unsigned char *) buffer;
+
+		/* First, grab appropriate ungetc() chars.  NOT FOR WIDE ORIENTATED! */
+		while (bytes && (stream->modeflags & __MASK_UNGOT)) {
+#ifdef __STDIO_WIDE
+			assert(stream->modeflags & __FLAG_NARROW);
+#endif /* __STDIO_WIDE */
+			*p++ = stream->ungot[(--stream->modeflags) & __MASK_UNGOT];
+			stream->ungot[1] = 0;
+			--bytes;
+		}	
+
+		while (bytes > 0) {
+			ssize_t len = _stdio_READ(stream, p, (unsigned) bytes);
+			if (len == 0) {
+				break;
+			}
+			p += len;
+			bytes -= len;
+		}
+
+		__stdio_validate_FILE(stream); /* debugging only */
+		return (p - (unsigned char *)buffer);
+	}
+
+#endif /* __STDIO_BUFFERS */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L__stdio_fwrite
+/*
+ * If buffer == NULL, attempt to fflush and return number of chars
+ * remaining in buffer (0 if successful fflush).
+ */
+
+/* WARNING!!!! Current standards say that termination due to an asyncronous
+ * signal may not result in stdio streams being flushed.  This libary makes
+ * an effort to do so but there is no way, short of blocking signals for
+ * each _stdio_fwrite call, that we can maintain the correct state if a
+ * signal is recieved mid-call.  So any stream in mid-_stdio_fwrite could
+ * not some flush data or even duplicate-flush some data.  It is possible
+ * to avoid the duplicate-flush case by setting/clearing the stream
+ * error flag before/after the write process, but it doesn't seem worth
+ * the trouble. */
+
+/* Like standard write, but always does a full write unless error plus
+ *deals correctly with bufsize > SSIZE_MAX... not much on an issue on linux
+ * but definitly could be on Elks.  Also on Elks, always loops for EINTR..
+ * Returns number of bytes written, so a short write indicates an error */
+static size_t _stdio_WRITE(FILE *stream, const void *buf, size_t bufsize)
+{
+	size_t todo;
+	ssize_t rv, stodo;
+
+	todo = bufsize;
+
+	while (todo) {
+		stodo = (todo <= SSIZE_MAX) ? todo : SSIZE_MAX;
+		rv = __WRITE(stream, buf, stodo);
+		if (rv >= 0) {
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+			assert(rv <= stodo);	/* buggy user handler... TODO: check? */
+			if (rv > stodo) {	/* Num reported written > number requested */
+				rv = stodo;		/* Treat as a full write??? */
+			}
+#endif
+			todo -= rv;
+			buf += rv;
+		} else
+#ifdef __BCC__
+			if (errno != EINTR)
+#endif
+		{
+			stream->modeflags |= __FLAG_ERROR;
+			break;
+		}
+	}
+
+	return bufsize - todo;
+}
+
+/* Internal function -- not reentrant. */
+
+size_t _stdio_fwrite(const unsigned char *buffer, size_t bytes,
+					   register FILE *stream)
+{
+#ifdef __STDIO_BUFFERS
+	register const unsigned char *p;
+
+	__stdio_validate_FILE(stream); /* debugging only */
+
+	if ((stream->modeflags & __FLAG_READONLY)
+#ifndef __STDIO_AUTO_RW_TRANSITION
+	/* ANSI/ISO requires either at EOF or currently not reading. */
+		|| ((stream->modeflags & (__FLAG_READING|__FLAG_EOF))
+			== __FLAG_READING)
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+		) {
+		stream->modeflags |= __FLAG_ERROR;
+		/* TODO: This is for posix behavior if readonly.  To save space, we
+		 * use this errno for write attempt while reading, as no errno is
+		 * specified by posix for this case, even though the restriction is
+		 * mentioned in fopen(). */
+		errno = EBADF;
+		return 0;
+	}
+
+#ifdef __STDIO_AUTO_RW_TRANSITION
+	/* If we were reading, deal with ungots and buffered chars. */
+	if ((stream->modeflags & (__FLAG_EOF|__FLAG_WRITING|__FLAG_WRITEONLY))
+		== 0) {
+		/* If appending, we might as well seek to end to save a seek. */
+		fseek(stream, 0L, 
+			  ((stream->modeflags & __FLAG_APPEND) ? SEEK_END : SEEK_CUR));
+		/* TODO: set EOF in fseek when appropriate? */
+	}
+#endif
+
+	/* We need to disable putc and getc macros in case of error */
+#if defined(__STDIO_AUTO_RW_TRANSITION) \
+	|| defined(__STDIO_PUTC_MACRO) || defined(__STDIO_GETC_MACRO)
+#ifdef __STDIO_AUTO_RW_TRANSITION
+	stream->bufrpos =			/* TODO -- necessary? */
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+#ifdef __STDIO_PUTC_MACRO
+	stream->bufputc =
+#endif /* __STDIO_GETC_MACRO */
+#ifdef __STDIO_GETC_MACRO
+	stream->bufgetc =
+#endif /* __STDIO_GETC_MACRO */
+	stream->bufstart;
+#endif /* not using ansi restrictions ; or using putc and/or getc macro */
+
+	/* Clear both reading and writing flags.  We need to clear the writing
+	 * flag in case we're fflush()ing or in case of an error. */
+	stream->modeflags &= ~(__FLAG_READING|__FLAG_WRITING);
+
+	{
+		const unsigned char *buf0 = buffer;
+
+		if (!buffer) {				/* fflush the stream */
+		FFLUSH:
+			{
+				size_t count = stream->bufwpos - stream->bufstart;
+				p = stream->bufstart;
+
+				if (stream->filedes == -2) { /* TODO -- document this hack! */
+					stream->modeflags |= __FLAG_WRITING;
+					return (!buffer) ? 0 : ((buffer - buf0) + bytes);
+				}
+
+				{
+					size_t rv = _stdio_WRITE(stream, p, count);
+					p += rv;
+					count -= rv;
+				}
+			
+				stream->bufwpos = stream->bufstart;
+				while (count) {
+					*stream->bufwpos++ = *p++;
+					--count;
+				}
+
+				if (!buffer) {	/* fflush case... */
+					__stdio_validate_FILE(stream); /* debugging only */
+					return stream->bufwpos - stream->bufstart;
+				}
+			}
+		}
+
+#if 1
+		/* TODO: If the stream is buffered, we may be able to omit. */
+		if ((stream->bufwpos == stream->bufstart) /* buf empty */
+			&& (stream->bufend - stream->bufstart <= bytes)	/* fills */
+			&& (stream->filedes != -2)) { /* not strinf fake file */
+			/* so want to do a direct write of supplied buffer */
+			{
+				size_t rv = _stdio_WRITE(stream, buffer, bytes);
+				buffer += rv;
+				bytes -= rv;
+			}
+		} else
+#endif
+		/* otherwise buffer not empty and/or data fits */
+		{
+			size_t count = stream->bufend - stream->bufwpos;
+			p = buffer;
+
+			if (count > bytes) {
+				count = bytes;
+			}
+			bytes -= count;
+
+			while (count) {
+				*stream->bufwpos++ = *buffer++;
+				--count;
+			}
+
+			if (bytes) {
+				goto FFLUSH;
+			}
+
+			if (stream->modeflags & __FLAG_LBF) {
+				while (p < buffer) { /* check for newline. */
+					if (*p++ == '\n') {
+						goto FFLUSH;
+					}
+				}
+			}
+		}
+
+#ifdef __STDIO_PUTC_MACRO
+		if (!(stream->modeflags & (__FLAG_WIDE|__MASK_BUFMODE))) {
+			/* Not wide, no errors and fully buffered, so enable putc macro. */
+			stream->bufputc = stream->bufend;
+		}
+#endif /* __STDIO_GETC_MACRO */
+		stream->modeflags |= __FLAG_WRITING; /* Ensure Writing flag is set. */
+
+		__stdio_validate_FILE(stream); /* debugging only */
+		return buffer - buf0;
+
+	}
+
+#else  /* __STDIO_BUFFERS --------------------------------------- */
+
+	__stdio_validate_FILE(stream); /* debugging only */
+
+	if ((stream->modeflags & __FLAG_READONLY)
+#ifndef __STDIO_AUTO_RW_TRANSITION
+	/* ANSI/ISO requires either at EOF or currently not reading. */
+		|| ((stream->modeflags & (__FLAG_READING|__FLAG_EOF))
+			== __FLAG_READING)
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+		) {
+		stream->modeflags |= __FLAG_ERROR;
+		/* TODO: This is for posix behavior if readonly.  To save space, we
+		 * use this errno for write attempt while reading, as no errno is
+		 * specified by posix for this case, even though the restriction is
+		 * mentioned in fopen(). */
+		errno = EBADF;
+		return 0;
+	}
+
+	/* We always clear the reading flag in case at EOF. */
+	stream->modeflags &= ~(__FLAG_READING);
+	/* Unlike the buffered case, we set the writing flag now since we don't
+	 * need to do anything here for fflush(). */
+	stream->modeflags |= __FLAG_WRITING;
+
+	{
+		register unsigned char *p = (unsigned char *) buffer;
+
+		ssize_t rv = _stdio_WRITE(stream, p, bytes);
+
+		p += rv;
+		bytes -= rv;
+
+		__stdio_validate_FILE(stream); /* debugging only */
+		return (p - (unsigned char *)buffer);
+	}
+
+#endif /* __STDIO_BUFFERS *****************************************/
+}
+
+#endif
+/**********************************************************************/
+#ifdef L__stdio_init
+
+/* Internal functions -- _stdio_init() and __stdio_validate_FILE
+ * are not reentrant, but _stdio_term() is through fflush().
+ * Also, the _cs_{read|write|close} functions are not reentrant. */
+
+#ifndef NDEBUG
+void __stdio_validate_FILE(FILE *stream)
+{
+	if (stream->filedes == -2) { /* fake FILE for sprintf, scanf, etc. */
+		return;
+	}
+
+	__STDIO_THREADLOCK(stream);
+
+#ifdef __STDIO_BUFFERS
+	assert(stream->bufstart <= stream->bufrpos);
+	assert(stream->bufrpos <= stream->bufwpos);
+	assert(stream->bufwpos <= stream->bufend);
+	assert(stream->bufwpos <= stream->bufend);
+	if ((stream->modeflags & __MASK_BUFMODE) == __FLAG_NBF) {
+		assert(stream->bufstart == stream->bufend);
+	}
+	assert((stream->modeflags & __MASK_BUFMODE) <= __FLAG_NBF);
+#endif
+#ifdef __STDIO_PUTC_MACRO
+	assert(stream->bufstart <= stream->bufputc);
+	assert(stream->bufputc <= stream->bufend);
+	if (stream->bufstart < stream->bufputc) {
+		assert(stream->bufputc == stream->bufend);
+		assert(stream->modeflags & (__FLAG_WRITING));
+		assert(!(stream->modeflags
+				 & (__FLAG_WIDE|__MASK_BUFMODE|__MASK_UNGOT|__FLAG_READONLY))
+			   );
+	}
+#endif
+#ifdef __STDIO_GETC_MACRO
+	assert(stream->bufstart <= stream->bufgetc);
+	assert(stream->bufgetc <= stream->bufwpos);
+	if (stream->bufstart < stream->bufgetc) {
+		assert(stream->modeflags & (__FLAG_READING));
+		assert(!(stream->modeflags
+				 & (__FLAG_WIDE|__MASK_BUFMODE|__MASK_UNGOT|__FLAG_WRITEONLY))
+			   );
+	}
+#endif
+	assert((stream->modeflags & __MASK_UNGOT) != __MASK_UNGOT);
+	if (stream->modeflags & __MASK_UNGOT1) {
+		assert(stream->ungot[1] <= 1);
+	}
+	if (stream->modeflags & __MASK_UNGOT) {
+		assert(!(stream->modeflags & __FLAG_EOF));
+	}
+	assert((stream->modeflags & (__FLAG_READONLY|__FLAG_WRITEONLY))
+		   != (__FLAG_READONLY|__FLAG_WRITEONLY));
+
+	/* TODO -- filepos?  ungot_width?  filedes?  nextopen? */
+
+	__STDIO_THREADUNLOCK(stream);
+}
+#endif
+
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+ssize_t _cs_read(void *cookie, char *buf, size_t bufsize)
+{
+	return read(*((int *) cookie), buf, bufsize);
+}
+
+ssize_t _cs_write(void *cookie, const char *buf, size_t bufsize)
+{
+	return write(*((int *) cookie), (char *) buf, bufsize);
+}
+
+int _cs_close(void *cookie)
+{
+	return close(*((int *) cookie));
+}
+#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
+
+#ifdef __STDIO_BUFFERS
+static unsigned char _fixed_buffers[2 * BUFSIZ];
+#define bufin (_fixed_buffers)
+#define bufout (_fixed_buffers + BUFSIZ)
+#endif /* __STDIO_BUFFERS */
+
+static FILE _stdio_streams[] = {
+	__STDIO_INIT_FILE_STRUCT(_stdio_streams[0], __FLAG_LBF|__FLAG_READONLY, \
+							 0, _stdio_streams + 1, bufin, BUFSIZ ),
+	__STDIO_INIT_FILE_STRUCT(_stdio_streams[1], __FLAG_LBF|__FLAG_WRITEONLY, \
+							 1, _stdio_streams + 2, bufout, BUFSIZ ), 
+	__STDIO_INIT_FILE_STRUCT(_stdio_streams[2], __FLAG_NBF|__FLAG_WRITEONLY, \
+							 2, 0, 0, 0 )
+};
+
+FILE *_stdin = _stdio_streams + 0;
+FILE *_stdout = _stdio_streams + 1;
+FILE *_stderr = _stdio_streams + 2;
+
+#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
+
+#ifdef __STDIO_BUFFERS
+FILE *_stdio_openlist = _stdio_streams;
+#else  /* __STDIO_BUFFERS */
+FILE *_stdio_openlist = NULL;
+#endif /* __STDIO_BUFFERS */
+
+#ifdef __STDIO_THREADSAFE
+pthread_mutex_t _stdio_openlist_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+
+
+void __stdio_init_mutex(pthread_mutex_t *m)
+{
+	static const pthread_mutex_t __stdio_mutex_initializer
+		= PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+
+	memcpy(m, &__stdio_mutex_initializer, sizeof(__stdio_mutex_initializer));
+}
+#endif /* __STDIO_THREADSAFE */
+
+/* TODO - do we need to lock things, or do we just assume we're the only
+ * remaining thread? */
+
+/* Note: We assume here that we are the only remaining thread. */
+void _stdio_term(void)
+{
+#if defined(__STDIO_GLIBC_CUSTOM_STREAMS) || defined(__STDIO_THREADSAFE)
+	FILE *ptr;
+#endif
+
+	/* TODO: if called via a signal handler for a signal mid _stdio_fwrite,
+	 * the stream may be in an unstable state... what do we do?
+	 * perhaps set error flag before and clear when done if successful? */
+
+#ifdef __STDIO_THREADSAFE
+	/* First, forceably unlock the open file list and all files.
+	 * Note: Set locking mode to "by caller" to save some overhead later. */
+	__stdio_init_mutex(&_stdio_openlist_lock);
+	for (ptr = _stdio_openlist ; ptr ; ptr = ptr->nextopen ) {
+		ptr->user_locking = FSETLOCKING_BYCALLER;
+		__stdio_init_mutex(&ptr->lock);
+	}
+#endif /* __STDIO_THREADSAFE */
+
+	/* TODO -- set an alarm and flush each file "by hand"? to avoid blocking? */
+
+	/* Now flush all streams. */
+	fflush(NULL);
+
+	/* Next close all custom streams in case of any special cleanup, but
+	 * don't use fclose() because that pulls in free and malloc.  Also,
+	 * don't worry about removing them from the list.  Just set the cookie
+	 * pointer to NULL so that an error will be generated if someone tries
+	 * to use the stream. */
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+	for (ptr = _stdio_openlist ; ptr ; ptr = ptr->nextopen ) {
+		if (ptr->cookie != &ptr->filedes) {	/* custom stream */
+			__CLOSE(ptr);
+			ptr->cookie = NULL;	/* Generate an error if used later. */
+#if 0
+/*  #ifdef __STDIO_BUFFERS */
+		} else {
+			/* TODO: "unbuffer" files like glibc does?  Inconsistent with
+			 * custom stream handling above, but that's necessary to deal
+			 * with special user-defined close behavior. */
+			stream->bufwpos = stream->bufrpos = stream->bufend
+#ifdef __STDIO_GETC_MACRO
+				= stream->bufgetc
+#endif
+#ifdef __STDIO_PUTC_MACRO
+				= stream->bufputc
+#endif
+				= stream->bufstart;
+#endif /* __STDIO_BUFFERS */
+		}
+	}
+#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
+}
+
+
+#if defined(__STDIO_BUFFERS) || !defined(__UCLIBC__)
+void _stdio_init(void)
+{
+#ifdef __STDIO_BUFFERS
+	/* stdin and stdout uses line buffering when connected to a tty. */
+	_stdio_streams[0].modeflags ^= isatty(0) * __FLAG_LBF;
+	_stdio_streams[1].modeflags ^= isatty(1) * __FLAG_LBF;
+#endif /* __STDIO_BUFFERS */
+#ifndef __UCLIBC__
+/* __stdio_term is automatically when exiting if stdio is used.
+ * See misc/internals/__uClibc_main.c and and stdlib/atexit.c. */
+	atexit(_stdio_term);
+#endif /* __UCLIBC__ */
+}
+#endif /* defined(__STDIO_BUFFERS) || !defined(__UCLIBC__) */
+#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
+
+#endif
+/**********************************************************************/
+/* ANSI/ISO functions. */
+/**********************************************************************/
+#ifdef L_remove
+#include <unistd.h>
+#include <errno.h>
+
+/* No reentrancy issues. */
+
+int remove(register const char *filename)
+{
+	int old_errno = errno;
+
+	/* SUSv3 says equivalent to rmdir() if a directory, and unlink()
+	 * otherwise.  Hence, we need to try rmdir() first. */
+
+	return (((rmdir(filename) == 0)
+			 || ((errno == ENOTDIR)
+				 && ((__set_errno(old_errno), unlink(filename)) == 0)))
+			? 0 : -1);
+}
+#endif
+/**********************************************************************/
+/* rename is a syscall
+#ifdef L_rename
+int rename(const char *old, const char *new);
+#endif
+*/
+/**********************************************************************/
+/* TODO: tmpfile */
+/*  #ifdef L_tmpfile */
+/*  FILE *tmpfile(void); */
+/*  #endif */
+/**********************************************************************/
+/* TODO: tmpname */
+/*  #ifdef L_tmpname */
+/*  char *tmpname(char *s); */
+/*  #endif */
+/**********************************************************************/
+#ifdef L_fclose
+
+/* We need to be careful here to avoid deadlock when threading, as we
+ * need to lock both the file and the open file list.  This can clash
+ * with fflush.  Since fflush is much more common, we do the extra
+ * work here. */
+
+int fclose(register FILE *stream)
+{
+#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
+
+	register FILE *ptr;
+	int rv = 0;
+
+#ifdef __STDIO_THREADSAFE
+	/* Need two non-heirchal mutexs... be careful to avoid deadlock*/
+	do {
+		__STDIO_THREADLOCK(stream);
+		if (__STDIO_THREADTRYLOCK_OPENLIST == 0) {
+			break;
+		}
+		__STDIO_THREADUNLOCK(stream);
+		usleep(10000);
+	} while (1);
+#endif /* __STDIO_THREADSAFE */
+
+	__stdio_validate_FILE(stream); /* debugging only */
+
+#ifdef __STDIO_BUFFERS
+	if (stream->modeflags & __FLAG_WRITING) {
+		rv = fflush(stream);	/* Write any pending buffered chars. */
+	}							/* Also disables putc macro if used. */
+
+#ifdef __STDIO_GETC_MACRO
+	/* Not necessary after fflush, but always do this to reduce size. */
+	stream->bufgetc = stream->bufstart;	/* Disable getc macro for safety. */
+#endif /* __STDIO_GETC_MACRO */
+#endif /* __STDIO_BUFFERS */
+
+	/* Remove file from open list before closing file descriptor. */
+	ptr = _stdio_openlist;
+	if (ptr == stream) {
+		_stdio_openlist = stream->nextopen;
+	} else {
+		while (ptr) {
+			if (ptr->nextopen == stream) {
+				ptr->nextopen = stream->nextopen;
+				break;
+			}
+			ptr = ptr->nextopen;
+		}
+	}
+	__STDIO_THREADUNLOCK_OPENLIST; /* We're done with the open file list. */
+
+	if (__CLOSE(stream) < 0) {	/* Must close even if fflush failed. */
+		rv = EOF;
+	}
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+	stream->cookie = NULL;		/* To aid debugging... */
+#endif
+	stream->filedes = -1;		/* To aid debugging... */
+
+#ifdef __STDIO_BUFFERS
+	if (stream->modeflags & __FLAG_FREEBUF) {
+		free(stream->bufstart);
+	}
+#endif /* __STDIO_BUFFERS */
+
+	/* TODO -- leave the stream locked to catch any dangling refs? */
+	__STDIO_THREADUNLOCK(stream);
+
+	/* At this point, any dangling refs to the stream are the result of
+	 * a programming bug... so free the unlocked stream. */
+	if (stream->modeflags & __FLAG_FREEFILE) {
+		free(stream);
+	}
+
+	return rv;
+
+#else  /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
+
+	int rv = 0;
+
+	__STDIO_THREADLOCK(stream);
+
+	__stdio_validate_FILE(stream); /* debugging only */
+
+	if (__CLOSE(stream) < 0) {	/* Must close even if fflush failed. */
+		rv = EOF;
+	}
+
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+	stream->cookie = NULL;		/* To aid debugging... */
+#endif
+	stream->filedes = -1;		/* To aid debugging... */
+
+	__STDIO_THREADUNLOCK(stream);
+
+	/* At this point, any dangling refs to the stream are the result of
+	 * a programming bug... so free the unlocked stream. */
+	if (stream->modeflags & __FLAG_FREEFILE) {
+		free(stream);
+	}
+
+	return rv;
+
+#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS )*/
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fflush
+
+/*
+ * Special cases:
+ *   stream == NULL means fflush all writing streams (ANSI/ISO).
+ *   stream == (FILE *) &_stdio_openlist -- implementation-specific hack
+ *      meaning fflush all line buffered writing streams
+ */
+
+/*
+ * NOTE: ANSI/ISO difference!!!  According to the standard, fflush is only
+ * defined for write-only streams, or read/write streams whose last op
+ * was a write.  However, reading is allowed for a read/write stream if
+ * a file positioning operation was done (fseek, fsetpos) even though there
+ * is no guarantee of flushing the write data in that case.  Hence, for
+ * this case we keep a flag to indicate whether or not the buffer needs to
+ * be flushed even if the last operation was a read.  This falls under the
+ * implementation-defined behavior.  Otherwise, we would need to flush
+ * every time we did fseek, etc. even if we were still in the buffer's range.
+ */
+
+/* Since the stream pointer arg is allowed to be NULL, or the address of the
+ * stdio open file list if stdio is buffered in this implementation, we can't
+ * use the UNLOCKED() macro here. */
+
+#ifndef __STDIO_THREADSAFE
+strong_alias(fflush_unlocked,fflush)
+#else  /* __STDIO_THREADSAFE */
+int fflush(register FILE *stream)
+{
+	int retval;
+
+	if ((stream != NULL)
+#ifdef __STDIO_BUFFERS
+		&& (stream != (FILE *) &_stdio_openlist)
+#endif /* __STDIO_BUFFERS */
+		) {
+		__STDIO_THREADLOCK(stream);
+		retval = fflush_unlocked(stream);
+		__STDIO_THREADUNLOCK(stream);
+	} else {
+		retval = fflush_unlocked(stream);
+	}
+
+	return retval;
+}
+#endif /* __STDIO_THREADSAFE */
+
+int fflush_unlocked(register FILE *stream)
+{
+#ifdef __STDIO_BUFFERS
+
+	int rv = 0;
+	unsigned short mask = (__FLAG_NBF|__FLAG_LBF);
+
+#ifndef NDEBUG
+	if ((stream != NULL) && (stream != (FILE *) &_stdio_openlist)) {
+		__stdio_validate_FILE(stream); /* debugging only */
+	}
+#endif
+
+	if (stream == (FILE *) &_stdio_openlist) { /* fflush all line-buffered */
+		stream = NULL;
+		mask = __FLAG_LBF;
+	}
+
+	if (stream == NULL) {		/* flush all (line) buffered writing streams */
+		/* Note -- We have to lock the list even in the unlocked function. */
+		__STDIO_THREADLOCK_OPENLIST;
+		/* TODO -- Can we work around locking the list to avoid keeping it
+		 * locked if the write blocks? */
+		for (stream = _stdio_openlist; stream; stream = stream->nextopen) {
+			if (((stream->modeflags ^ __FLAG_NBF) & mask)
+				&& (stream->modeflags & __FLAG_WRITING)
+				&& fflush(stream)) {
+				rv = EOF;
+			}
+		}
+		__STDIO_THREADUNLOCK_OPENLIST;
+	} else if (stream->modeflags & __FLAG_WRITING) {
+		if (_stdio_fwrite(NULL, 0, stream) > 0) { /* flush buffer contents. */
+			rv = -1;			/* Not all chars written. */
+		}
+	} else if (stream->modeflags & (__FLAG_READONLY|__FLAG_READING)) {
+		/* TODO - __FLAG_READING too?  check glibc behavior */
+		/* According to info, glibc returns an error when the file is opened
+		 * in read-only mode.
+		 * ANSI/ISO says behavior in this case is undefined but also says you
+		 * shouldn't flush a stream you were reading from.
+		 */
+		stream->modeflags |= __FLAG_ERROR; /* TODO - check glibc behavior */
+		__set_errno(EBADF);
+		rv = -1;
+	}
+
+#ifndef NDEBUG
+	if ((stream != NULL) && (stream != (FILE *) &_stdio_openlist)) {
+		__stdio_validate_FILE(stream); /* debugging only */
+	}
+#endif
+	return rv;
+
+#else  /* __STDIO_BUFFERS --------------------------------------- */
+
+	__stdio_validate_FILE(stream); /* debugging only */
+	/* TODO -- check glibc behavior regarding error indicator */
+	return (stream->modeflags & (__FLAG_READONLY|__FLAG_READING)
+			? ((stream->modeflags |= __FLAG_ERROR), __set_errno(EBADF), EOF)
+			: 0 );
+
+#endif /* __STDIO_BUFFERS */
+}
+#endif
+/**********************************************************************/
+#ifdef L_fopen
+
+/* No reentrancy issues. */
+
+FILE *fopen(const char * __restrict filename, const char * __restrict mode)
+{
+	return _stdio_fopen(filename, mode, NULL, -1);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L__stdio_fopen
+
+/*
+ * Cases:
+ *  fopen    : filename != NULL, stream == NULL, filedes == -1
+ *  freopen  : filename != NULL, stream != NULL, filedes == -1
+ *  fdopen   : filename == NULL, stream == NULL, filedes valid
+ *  fsfopen  : filename != NULL, stream != NULL, filedes == -1
+ *  fopen64  : filename != NULL, stream == NULL, filedes == -2
+ */
+
+#if O_ACCMODE != 3 || O_RDONLY != 0 || O_WRONLY != 1 || O_RDWR != 2 || O_APPEND != __FLAG_APPEND || O_LARGEFILE != __FLAG_LARGEFILE
+#error Assumption violated - mode constants
+#endif
+
+/* Internal function -- reentrant (locks open file list) */
+
+FILE *_stdio_fopen(const char * __restrict filename,
+					 register const char * __restrict mode,
+					 register FILE * __restrict stream, int filedes)
+{
+	__mode_t open_mode;
+
+	/* parse mode */
+	open_mode = O_RDONLY;
+	if (*mode != 'r') {			/* not read */
+		open_mode = (O_WRONLY | O_CREAT | O_TRUNC);
+		if (*mode != 'w') {		/* not write (create or truncate)*/
+			open_mode = (O_WRONLY | O_CREAT | O_APPEND);
+			if (*mode != 'a') {	/* not write (create or append) */
+				__set_errno(EINVAL); /* then illegal mode */
+				if (stream) {	/* If this is freopen, free the stream. */
+					goto FREE_STREAM;
+				}
+				return NULL;
+			}
+		}
+	}
+
+	if ((*++mode == 'b')) {		/* binary mode (NOP currently) */
+		++mode;
+	}
+
+	if (*mode == '+') {			/* read-write */
+		++mode;
+		open_mode &= ~(O_RDONLY | O_WRONLY);
+		open_mode |= O_RDWR;
+	}
+
+#if defined(__STDIO_GNU_FEATURE) || defined(__STDIO_FOPEN_LARGEFILE_MODE)
+	while (*mode) {				/* ignore everything else except ... */
+#ifdef __STDIO_FOPEN_EXCLUSIVE_MODE
+		if (*mode++ == 'x') {	/* open exclusive -- glibc extension */
+			open_mode |= O_EXCL;
+		}
+#endif /* __STDIO_FOPEN_EXCLUSIVE_MODE */
+#ifdef __STDIO_FOPEN_LARGEFILE_MODE
+		if (*mode++ == 'F') {	/* open large file */
+			open_mode |= O_LARGEFILE;
+		}
+#endif /* __STDIO_FOPEN_LARGEFILE_MODE */
+	}
+#endif /* __STDIO_FOPEN_EXCLUSIVE_MODE or __STDIO_FOPEN_LARGEFILE_MODE def'd */
+
+#ifdef __BCC__
+	mode = filename;			/* TODO:  help BCC with register allocation. */
+#define filename mode
+#endif /* __BCC__ */
+
+	if (!stream) {				/* Need to allocate a FILE. */
+#ifdef __STDIO_BUFFERS
+		if ((stream = malloc(sizeof(FILE))) == NULL) {
+			return stream;
+		}
+		stream->modeflags = __FLAG_FREEFILE;
+		if ((stream->bufstart = malloc(BUFSIZ)) != 0) {
+			stream->bufend = stream->bufstart + BUFSIZ;
+			stream->modeflags |= __FLAG_FREEBUF;
+		} else {
+#if __STDIO_BUILTIN_BUF_SIZE > 0
+			stream->bufstart = stream->unbuf;
+			stream->bufend = stream->unbuf + sizeof(stream->unbuf);
+#else  /* __STDIO_BUILTIN_BUF_SIZE > 0 */
+			stream->bufstart = stream->bufend = NULL;
+#endif /* __STDIO_BUILTIN_BUF_SIZE > 0 */
+		}
+#else  /* __STDIO_BUFFERS */
+		if ((stream = malloc(sizeof(FILE))) == NULL) {
+			return stream;
+		}
+		stream->modeflags = __FLAG_FREEFILE;
+#endif /* __STDIO_BUFFERS */
+	}
+
+	if (filedes >= 0) {			/* Handle fdopen trickery. */
+		/*
+		 * NOTE: it is insufficient to just check R/W/RW agreement.
+		 * We must also check for append mode agreement, as well as
+		 * largefile agreement if applicable.
+		 */
+		int i = (open_mode & (O_ACCMODE|O_APPEND|O_LARGEFILE)) + 1;
+
+		if ((i & (((int) filename) + 1)) != i) {
+			__set_errno(EINVAL);
+			filedes = -1;
+		}
+		stream->filedes = filedes;
+	} else {
+#ifdef __STDIO_LARGE_FILES
+		if (filedes < -1) {
+			open_mode |= __FLAG_LARGEFILE;
+		}
+#endif /* __STDIO_LARGE_FILES */
+		stream->filedes = open(filename, open_mode, 0666);
+	}
+
+	if (stream->filedes < 0) {
+	FREE_STREAM:
+#ifdef __STDIO_BUFFERS
+		if (stream->modeflags & __FLAG_FREEBUF) {
+			free(stream->bufstart);
+		}
+#endif /* __STDIO_BUFFERS */
+		if (stream->modeflags & __FLAG_FREEFILE) {
+			free(stream);
+		}
+		return NULL;
+	}
+
+#ifdef __STDIO_BUFFERS
+	stream->modeflags |= (isatty(stream->filedes) * __FLAG_LBF)
+		| ((((open_mode & O_ACCMODE) + 1) ^ 0x03) * __FLAG_WRITEONLY)
+		| (open_mode & (O_APPEND|O_LARGEFILE));
+
+
+#ifdef __STDIO_GETC_MACRO
+	stream->bufgetc =
+#endif
+#ifdef __STDIO_PUTC_MACRO
+	stream->bufputc =
+#endif
+	stream->bufwpos = stream->bufrpos = stream->bufstart;
+
+#else  /* __STDIO_BUFFERS */
+	stream->modeflags |= 
+		((((open_mode & O_ACCMODE) + 1) ^ 0x03) * __FLAG_WRITEONLY)
+		| (open_mode & (O_APPEND|O_LARGEFILE));
+#endif /* __STDIO_BUFFERS */
+
+#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
+	stream->cookie = &(stream->filedes);
+	stream->gcs.read = _cs_read;
+	stream->gcs.write = _cs_write;
+	stream->gcs.seek = 0;		/* The internal seek func handles normals. */
+	stream->gcs.close = _cs_close;
+#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
+
+#ifdef __STDIO_THREADSAFE
+	__stdio_init_mutex(&stream->lock);
+#endif /* __STDIO_THREADSAFE */
+
+#if defined(__STDIO_BUFFERS) \
+|| (defined(__STDIO_THREADSAFE) && defined(__STDIO_GLIBC_CUSTOM_STREAMS))
+	__STDIO_THREADLOCK_OPENLIST;
+	stream->nextopen = _stdio_openlist;	/* New files are inserted at */
+	_stdio_openlist = stream;			/*   the head of the list. */
+	__STDIO_THREADUNLOCK_OPENLIST;
+#endif
+
+	__stdio_validate_FILE(stream); /* debugging only */
+	return stream;
+#ifdef __BCC__
+#undef filename
+#endif /* __BCC__ */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_freopen
+
+/* Reentrant. */
+
+FILE *freopen(const char * __restrict filename, const char * __restrict mode,
+			  register FILE * __restrict stream)
+{
+	/*
+	 * ANSI/ISO allow (implementation-defined) change of mode for an
+	 * existing file if filename is NULL.  It doesn't look like Linux
+	 * supports this, so we don't here.
+	 *
+	 * NOTE: Whether or not the stream is free'd on failure is unclear
+	 *       w.r.t. ANSI/ISO.  This implementation chooses to free the
+	 *       stream and associated buffer if they were dynamically
+	 *       allocated.
+	 * TODO: Check the above.
+	 * TODO: Apparently linux allows setting append mode.  Implement?
+	 */
+	unsigned short dynmode;
+	FILE *fp;
+
+	__STDIO_THREADLOCK(stream);
+
+	/* First, flush and close, but don't deallocate, the stream. */
+	/* This also removes the stream for the open file list. */
+	dynmode = 
+#ifdef __STDIO_BUFFERS
+		//		__MASK_BUFMODE |		/* TODO: check */
+#endif /* __STDIO_BUFFERS */
+		(stream->modeflags & (__FLAG_FREEBUF|__FLAG_FREEFILE));
+
+	stream->modeflags &= ~(__FLAG_FREEBUF|__FLAG_FREEFILE);
+	fclose(stream);				/* Failures are ignored. */
+	stream->modeflags = dynmode;
+
+	fp = _stdio_fopen(filename, mode, stream, -1);
+
+	__STDIO_THREADUNLOCK(stream);
+
+	return fp;
+}
+#endif
+/**********************************************************************/
+#ifdef L_freopen64
+
+/* Reentrant. */
+
+/* TODO -- is it collecting the common work (40 bytes) into a function? */
+FILE *freopen64(const char * __restrict filename, const char * __restrict mode,
+				register FILE * __restrict stream)
+{
+	unsigned short dynmode;
+	FILE *fp;
+
+	__STDIO_THREADLOCK(stream);
+
+	/* First, flush and close, but don't deallocate, the stream. */
+	/* This also removes the stream for the open file list. */
+	dynmode = 
+#ifdef __STDIO_BUFFERS
+		//		__MASK_BUFMODE |		/* TODO: check */
+#endif /* __STDIO_BUFFERS */
+		(stream->modeflags & (__FLAG_FREEBUF|__FLAG_FREEFILE));
+
+	stream->modeflags &= ~(__FLAG_FREEBUF|__FLAG_FREEFILE);
+	fclose(stream);				/* Failures are ignored. */
+	stream->modeflags = dynmode;
+
+	fp = _stdio_fopen(filename, mode, stream, -2); /* TODO -- magic const */
+
+	__STDIO_THREADUNLOCK(stream);
+
+	return fp;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_setbuf
+
+/* Reentrant through setvbuf(). */
+
+void setbuf(FILE * __restrict stream, register char * __restrict buf)
+{
+#ifdef __STDIO_BUFFERS
+	int mode;
+
+	mode = (buf != NULL) ? _IOFBF : _IONBF;
+	setvbuf(stream, buf, mode, BUFSIZ);
+#else  /* __STDIO_BUFFERS */
+	/* TODO -- assert on stream? */
+	/* Nothing to do. */
+#endif /* __STDIO_BUFFERS */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_setvbuf
+
+/* Reentrant. */
+
+int setvbuf(register FILE * __restrict stream, register char * __restrict buf,
+			int mode, size_t size)
+{
+#ifdef __STDIO_BUFFERS
+
+	int allocated_buf_flag;
+	int rv = EOF;
+
+	__STDIO_THREADLOCK(stream);
+
+	__stdio_validate_FILE(stream); /* debugging only */
+
+	if (((unsigned int) mode) > 2) { /* Illegal mode. */
+		/* TODO -- set an errno? */
+		goto DONE;
+	}
+
+#ifdef __STDIO_FLEXIBLE_SETVBUF
+	/* C89 standard requires no ops before setvbuf, but we can be flexible. */
+	/* NOTE: This will trash any chars ungetc'd!!! */
+	/* TODO: hmm could preserve unget count since ungot slots aren't changed (true?)
+	 * but this will fail when buffered chars read from a pipe unless the user buf
+	 * is big enough to copy everything over. */
+	if (fseek(stream, 0L, SEEK_CUR)) {
+		goto DONE;
+	}
+#else  /* __STDIO_FLEXIBLE_SETVBUF */
+	/*
+	 * Note: ANSI/ISO requires setvbuf to be called after opening the file
+	 * but before any other operation other than a failed setvbuf call.
+	 * We'll cheat here and only test if the wide or narrow mode flag has
+	 * been set; i.e. no read or write (or unget or fwide) operations have
+	 * taken place.
+	 */
+#ifdef __STDIO_WIDE
+	if (stream->modeflags & (__FLAG_WIDE|__FLAG_NARROW)) {
+		goto DONE;
+	}
+#else  /* __STDIO_WIDE */
+	/* Note: This only checks if not currently reading or writing. */
+	if (stream->modeflags & (__FLAG_READING|__FLAG_WRITING)) {
+		goto DONE;
+	}
+#endif /* __STDIO_WIDE */
+#endif /* __STDIO_FLEXIBLE_SETVBUF */
+
+	if (mode == _IONBF) {
+		size = 0;
+		buf = NULL;
+	}
+
+	stream->modeflags &= ~(__MASK_BUFMODE);	/* Clear current mode */
+	stream->modeflags |= mode * __FLAG_LBF;	/* and set new one. */
+
+	allocated_buf_flag = 0;
+	if ((!buf) && (size != (stream->bufend - stream->bufstart))) {
+		/* No buffer supplied and requested size different from current. */
+		allocated_buf_flag = __FLAG_FREEBUF;
+		/* If size == 0, create a (hopefully) bogus non-null pointer... */
+		if (!(buf = ((size > 0) ? malloc(size) : ((char *)NULL) + 1))) {
+			goto DONE;		/* Keep current buffer. */
+		}
+	}
+
+	/* TODO: setvbuf "signal" safety */
+	if (buf && (buf != (char *) stream->bufstart)) { /* Want new buffer. */
+		if (stream->modeflags & __FLAG_FREEBUF) {
+			stream->modeflags &= ~(__FLAG_FREEBUF);
+			free(stream->bufstart);
+		}
+		stream->modeflags |= allocated_buf_flag;	/* Free-able buffer? */
+#ifdef __STDIO_GETC_MACRO
+		stream->bufgetc =
+#endif
+#ifdef __STDIO_PUTC_MACRO
+		stream->bufputc =
+#endif
+		stream->bufwpos = stream->bufrpos = stream->bufstart = buf;
+		stream->bufend = buf + size;
+	}
+
+	__stdio_validate_FILE(stream); /* debugging only */
+
+	rv = 0;
+
+ DONE:
+	__STDIO_THREADUNLOCK(stream);
+
+	return rv;
+
+#else  /* __STDIO_BUFFERS */
+	__stdio_validate_FILE(stream); /* debugging only */
+	/* TODO -- set errno for illegal mode? */
+
+	return EOF;
+#endif /* __STDIO_BUFFERS */
+}
+
+#endif
+/**********************************************************************
+int fprintf(FILE * __restrict stream, const char * __restrict format, ...);
+int fscanf(FILE * __restrict stream, const char * __restrict format, ...);
+int printf(const char * __restrict format, ...);
+int scanf(const char * __restrict format, ...);
+int snprintf(char * __restrict s, size_t n,
+					const char * __restrict format, ...);
+int sprintf(char * __restrict s, const char * __restrict format, ...);
+int sscanf(char * __restrict s, const char * __restrict format, ...);
+int vfprintf(FILE * __restrict stream, const char * __restrict format,
+					va_list arg);
+int vfscanf(FILE * __restrict stream, const char * __restrict format,
+				   va_list arg);
+int vprintf(const char * __restrict format, va_list arg);
+int vscanf(const char * __restrict format, va_list arg);
+int vsnprintf(char * __restrict s, size_t n,
+					 const char * __restrict format, va_list arg);
+int vsprintf(char * __restrict s, const char * __restrict format,
+					va_list arg);
+int vsscanf(char * __restrict s, const char * __restrict format,
+				   va_list arg);
+**********************************************************************/
+#ifdef L_fgetc
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(int,fgetc,(FILE *stream),(stream))
+{
+	unsigned char buf[1];
+
+#ifdef __STDIO_WIDE
+
+	return (fread(buf, (size_t) 1, (size_t) 1, stream) > 0) ? *buf : EOF;
+
+#else  /* __STDIO_WIDE */
+
+	return (_stdio_fread(buf, (size_t) 1, stream) > 0) ? *buf : EOF;
+
+#endif /* __STDIO_WIDE */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fgets
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(char *,fgets,
+		 (char *__restrict s, int n, register FILE * __restrict stream),
+		 (s, n, stream))
+{
+	register char *p;
+	int c;
+
+	p = s;
+	while ((n > 1) && ((c = getc(stream)) != EOF) && ((*p++ = c) != '\n')) {
+		--n;
+	}
+	if (p == s) {
+		/* TODO -- should we set errno? */
+/*  		if (n <= 0) { */
+/*  			errno = EINVAL; */
+/*  		} */
+		return NULL;
+	}
+	*p = 0;
+	return s;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fputc
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(int,fputc,(int c, FILE *stream),(c,stream))
+{
+	unsigned char buf[1];
+
+	*buf = (unsigned char) c;
+
+#ifdef __STDIO_WIDE
+
+	return (fwrite(buf, (size_t) 1, (size_t) 1, stream) > 0) ? (*buf) : EOF;
+
+#else  /* __STDIO_WIDE */
+
+	return (_stdio_fwrite(buf, (size_t) 1, stream) > 0) ? (*buf) : EOF;
+
+#endif /* __STDIO_WIDE */
+}
+#endif
+/**********************************************************************/
+#ifdef L_fputs
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(int,fputs,
+		 (register const char * __restrict s, FILE * __restrict stream),
+		 (s, stream))
+{
+	size_t n = strlen(s);
+
+#ifdef __STDIO_WIDE
+
+	return (fwrite(s, n, (size_t) 1, stream) > 0) ? n : EOF;
+
+#else  /* __STDIO_WIDE */
+
+	return (_stdio_fwrite(s, n, stream) == n) ? n : EOF;
+
+#endif /* __STDIO_WIDE */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getc
+#undef getc
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(int,getc,(register FILE *stream),(stream))
+{
+	return __GETC(stream);		/* Invoke the macro. */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getchar
+#undef getchar					/* Just in case. */
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED_STREAM(int,getchar,(void),(),_stdin)
+{
+	register FILE *stream = _stdin; /* This helps bcc optimize. */
+
+	return __GETC(stream);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_gets
+
+link_warning(gets, "the 'gets' function is dangerous and should not be used.")
+
+/* Reentrant. */
+
+char *gets(char *s)				/* WARNING!!! UNSAFE FUNCTION!!! */
+{
+	register FILE *stream = _stdin;	/* This helps bcc optimize. */
+	register char *p = s;
+	int c;
+
+	__STDIO_THREADLOCK(stream);
+
+	/* Note: don't worry about performance here... this shouldn't be used!
+	 * Therefore, force actual function call. */
+	while (((c = (*getc)(stream)) != EOF) && ((*p = c) != '\n')) {
+		++p;
+	}
+	if ((c == EOF) || (s == p)) {
+		s = NULL;
+	} else {
+		*p = 0;
+	}
+
+	__STDIO_THREADUNLOCK(stream);
+
+	return s;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_putc
+#undef putc
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(int,putc,(int c, register FILE *stream),(c,stream))
+{
+	return __PUTC(c, stream);	/* Invoke the macro. */
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_putchar
+#undef putchar					/* Just in case. */
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED_STREAM(int,putchar,(int c),(c),_stdout)
+{
+	register FILE *stream = _stdout; /* This helps bcc optimize. */
+
+	return __PUTC(c, stream);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_puts
+
+/* Reentrant. */
+
+int puts(register const char *s)
+{
+	register FILE *stream = _stdout; /* This helps bcc optimize. */
+	int n;
+
+	__STDIO_THREADLOCK(stream);
+
+	n = fputs(s,stream) + 1;
+	if (
+#if 1
+		fputc('\n',stream)
+#else
+		fputs("\n",stream)
+#endif
+		== EOF) {
+		n = EOF;
+	}
+
+	__STDIO_THREADUNLOCK(stream);
+
+	return n;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_ungetc
+/*
+ * Note: This is the application-callable ungetc.  If scanf calls this, it
+ * should also set stream->ungot[1] to 0 if this is the only ungot.
+ */
+
+/* Reentrant. */
+
+int ungetc(int c, register FILE *stream)
+{
+	__STDIO_THREADLOCK(stream);
+
+	__stdio_validate_FILE(stream); /* debugging only */
+
+#ifdef __STDIO_WIDE
+	if (stream->modeflags & __FLAG_WIDE) {
+		stream->modeflags |= __FLAG_ERROR;
+		c = EOF;
+		goto DONE;
+	}
+	stream->modeflags |= __FLAG_NARROW;
+#endif /* __STDIO_WIDE */
+
+	/* If can't read or there's been an error, or c == EOF, or ungot slots
+	 * already filled, then return EOF */
+	if ((stream->modeflags
+		 & (__MASK_UNGOT2|__FLAG_WRITEONLY
+#ifndef __STDIO_AUTO_RW_TRANSITION
+			|__FLAG_WRITING		/* Note: technically no, but yes in spirit */
+#endif /* __STDIO_AUTO_RW_TRANSITION */
+			))
+		|| ((stream->modeflags & __MASK_UNGOT1) && (stream->ungot[1]))
+		|| (c == EOF) ) {
+		c = EOF;
+		goto DONE;;
+	}
+
+#ifdef __STDIO_BUFFERS
+								/* TODO: shouldn't allow writing??? */
+	if (stream->modeflags & __FLAG_WRITING) {
+		fflush(stream);			/* Commit any write-buffered chars. */
+	}
+#endif /* __STDIO_BUFFERS */
+
+	/* Clear EOF and WRITING flags, and set READING FLAG */
+	stream->modeflags &= ~(__FLAG_EOF|__FLAG_WRITING);
+	stream->modeflags |= __FLAG_READING;
+	stream->ungot[1] = 1;		/* Flag as app ungetc call; scanf fixes up. */
+	stream->ungot[(stream->modeflags++) & __MASK_UNGOT] = c;
+
+#ifdef __STDIO_GETC_MACRO
+	stream->bufgetc = stream->bufstart;	/* Must disable getc macro. */
+#endif
+
+	__stdio_validate_FILE(stream); /* debugging only */
+
+ DONE:
+	__STDIO_THREADUNLOCK(stream);
+
+	return c;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fread
+/* NOTE: Surely ptr cannot point to a buffer of size > SIZE_MAX.
+ * Therefore, we treat the case size * nmemb > SIZE_MAX as an error,
+ * and include an assert() for it. */
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(size_t,fread,
+		 (void * __restrict ptr, size_t size, size_t nmemb,
+		  FILE * __restrict stream),
+		 (ptr,size,nmemb,stream))
+{
+#ifdef __STDIO_WIDE
+	if (stream->modeflags & __FLAG_WIDE) {
+		stream->modeflags |= __FLAG_ERROR;
+		/* TODO -- errno?  it this correct? */
+		return 0;
+	}
+	stream->modeflags |= __FLAG_NARROW;
+#endif /* __STDIO_WIDE */
+
+	return (size == 0)
+		? 0
+		: (	assert( ((size_t)(-1)) / size >= nmemb ),
+			_stdio_fread(ptr, nmemb * size, stream) / size );
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fwrite
+/* NOTE: Surely ptr cannot point to a buffer of size > SIZE_MAX.
+ * Therefore, we treat the case size * nmemb > SIZE_MAX as an error,
+ * and include an assert() for it. */
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(size_t,fwrite,
+		 (const void * __restrict ptr, size_t size, size_t nmemb,
+		  FILE * __restrict stream),
+		 (ptr,size,nmemb,stream))
+{
+#ifdef __STDIO_WIDE
+	if (stream->modeflags & __FLAG_WIDE) {
+		stream->modeflags |= __FLAG_ERROR;
+		/* TODO -- errno?  it this correct? */
+		return 0;
+	}
+	stream->modeflags |= __FLAG_NARROW;
+#endif /* __STDIO_WIDE */
+
+	return (size == 0)
+		? 0
+		: (	assert( ((size_t)(-1)) / size >= nmemb ),
+			_stdio_fwrite(ptr, nmemb * size, stream) / size );
+}
+
+#endif
+/**********************************************************************/
+#if defined(L_fgetpos) || defined(L_fgetpos64)
+
+/* Reentrant -- fgetpos() and fgetpos64(). */
+
+#if defined(L_fgetpos) && defined(L_fgetpos64)
+#error L_fgetpos and L_fgetpos64 are defined simultaneously!
+#endif
+
+#ifndef L_fgetpos64
+#define fgetpos64	fgetpos
+#define fpos64_t	fpos_t
+#define ftello64	ftell
+#endif
+
+
+int fgetpos64(FILE * __restrict stream, register fpos64_t * __restrict pos)
+{
+	int retval;
+
+	__STDIO_THREADLOCK(stream);
+
+	retval = ((pos != NULL) && ((pos->__pos = ftello64(stream)) >= 0))
+		? (
+#ifdef __STDIO_MBSTATE_DATA
+		   __COPY_MBSTATE(&(pos->__mbstate), &(stream->mbstate)),
+#endif /* __STDIO_MBSTATE_DATA */
+		   0)
+		: (__set_errno(EINVAL), -1);
+
+	__STDIO_THREADUNLOCK(stream);
+
+	return retval;
+}
+
+#ifndef L_fgetpos64
+#undef fgetpos64
+#undef fpos64_t
+#undef ftello64
+#endif
+
+#endif
+/**********************************************************************/
+#ifdef L_fseek
+strong_alias(fseek, fseeko);
+#endif
+
+#if defined(L_fseek) && defined(__STDIO_LARGE_FILES)
+
+int fseek(register FILE *stream, long int offset, int whence)
+{
+	return fseeko64(stream, offset, whence);
+}
+
+#endif
+
+#if defined(L_fseeko64) || (defined(L_fseek) && !defined(__STDIO_LARGE_FILES))
+
+#ifndef L_fseeko64
+#define fseeko64	fseek
+#define __off64_t	long int
+#endif
+
+/* Reentrant -- fseek(), fseeko(), fseeko64() */
+
+int fseeko64(register FILE *stream, __off64_t offset, int whence)
+{
+#if SEEK_SET != 0 || SEEK_CUR != 1 || SEEK_END != 2
+#error Assumption violated -- values of SEEK_SET, SEEK_CUR, SEEK_END
+#endif
+	__offmax_t pos[1];
+	int retval;
+
+	if ( ((unsigned int) whence) > 2 ) {
+		__set_errno(EINVAL);
+		return -1;
+	}
+
+	__STDIO_THREADLOCK(stream);
+
+	__stdio_validate_FILE(stream); /* debugging only */
+
+	retval = -1;
+	*pos = offset;
+	if (
+#ifdef __STDIO_BUFFERS
+		/* First commit any pending buffered writes. */
+		((stream->modeflags & __FLAG_WRITING) && fflush(stream)) ||
+#endif /* __STDIO_BUFFERS */
+		((whence == SEEK_CUR) && (_stdio_adjpos(stream, pos) < 0))
+		|| (_stdio_lseek(stream, pos, whence) < 0)
+		) {
+		__stdio_validate_FILE(stream); /* debugging only */
+		goto DONE;
+	}
+
+#ifdef __STDIO_BUFFERS
+	/* only needed if reading but do it anyway to avoid test */
+#ifdef __STDIO_GETC_MACRO
+	stream->bufgetc =			/* Must disable getc. */
+#endif
+	stream->bufwpos = stream->bufrpos = stream->bufstart;
+#endif /* __STDIO_BUFFERS */
+
+	stream->modeflags &=
+		~(__FLAG_READING|__FLAG_WRITING|__FLAG_EOF|__MASK_UNGOT);
+
+#ifdef __STDIO_MBSTATE_DATA
+	/* TODO: don't clear state if don't move? */
+	__INIT_MBSTATE(&(stream->mbstate));
+#endif /* __STDIO_MBSTATE_DATA */
+	__stdio_validate_FILE(stream); /* debugging only */
+
+	retval = 0;
+
+ DONE:
+	__STDIO_THREADUNLOCK(stream);
+
+	return retval;
+}
+
+#ifndef L_fseeko64
+#undef fseeko64
+#undef __off64_t
+#endif
+
+#endif
+/**********************************************************************/
+#if defined(L_fsetpos) || defined(L_fsetpos64)
+
+#if defined(L_fsetpos) && defined(L_fsetpos64)
+#error L_fsetpos and L_fsetpos64 are defined simultaneously!
+#endif
+
+#ifndef L_fsetpos64
+#define fsetpos64	fsetpos
+#define fpos64_t	fpos_t
+#define fseeko64	fseek
+#endif
+
+/* Reentrant -- fgetpos{64}() through fseek{64}(). */
+
+int fsetpos64(FILE *stream, register const fpos64_t *pos)
+{
+	if (!pos) {
+		__set_errno(EINVAL);
+		return EOF;
+	}
+#ifdef __STDIO_MBSTATE_DATA
+#error unimplemented and non-reentrant besides!
+	{
+		int retval;
+		if ((retval = fseeko64(stream, pos->__pos, SEEK_SET)) == 0) {
+			__COPY_MBSTATE(&(stream->mbstate), &(pos->__mbstate));
+		}
+		return retval;
+	}
+#else  /* __STDIO_MBSTATE_DATA */
+	return fseeko64(stream, pos->__pos, SEEK_SET);
+#endif /* __STDIO_MBSTATE_DATA */
+}
+
+#ifndef L_fsetpos64
+#undef fsetpos64
+#undef fpos64_t
+#undef fseeko64
+#endif
+
+#endif
+/**********************************************************************/
+#ifdef L_ftell
+strong_alias(ftell, ftello);
+#endif
+
+#if defined(L_ftell) && defined(__STDIO_LARGE_FILES)
+long int ftell(register FILE *stream)
+{
+	__offmax_t pos = ftello64(stream);
+
+	return (pos == ((long int) pos)) ? pos : (__set_errno(EOVERFLOW), -1);
+}
+#endif
+
+#if defined(L_ftello64) || (defined(L_ftell) && !defined(__STDIO_LARGE_FILES))
+
+#ifndef L_ftello64
+#define ftello64	ftell
+#define __off64_t	long int
+#endif
+
+/* Reentrant -- ftell, ftello, ftello64. */
+
+__off64_t ftello64(register FILE *stream)
+{
+	__offmax_t pos[1];
+	__off64_t retval;
+
+	__STDIO_THREADLOCK(stream);
+
+	retval = (((*pos = 0), (_stdio_lseek(stream, pos, SEEK_CUR) < 0))
+			  || (_stdio_adjpos(stream, pos) < 0)) ? -1 : *pos;
+
+	__STDIO_THREADUNLOCK(stream);
+
+	return retval;
+}
+
+#ifndef L_ftello64
+#undef ftello64
+#undef __off64_t
+#endif
+
+#endif
+/**********************************************************************/
+#ifdef L_rewind
+
+void rewind(register FILE *stream)
+{
+	__STDIO_THREADLOCK(stream);
+
+	__CLEARERR(stream);			/* Clear errors first and then seek */
+	fseek(stream, 0L, SEEK_SET); /* in case there is an error seeking. */
+
+	__STDIO_THREADUNLOCK(stream);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_clearerr
+#undef clearerr
+
+/* Reentrancy handled by UNLOCKED_VOID_RETURN() macro. */
+
+UNLOCKED_VOID_RETURN(clearerr,(FILE *stream),(stream))
+{
+	__CLEARERR(stream);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_feof
+#undef feof
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(int,feof,(FILE *stream),(stream))
+{
+	return __FEOF(stream);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_ferror
+#undef ferror
+
+/* Reentrancy handled by UNLOCKED() macro. */
+
+UNLOCKED(int,ferror,(FILE *stream),(stream))
+{
+	return __FERROR(stream);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_perror
+
+/* TODO -- not allowed to interfere with static storage of strerror(). */
+
+void perror(register const char *s)
+{
+	/* If the program is calling perror, it's a safe bet that printf and
+	 * friends are used as well.  It is also possible that the calling
+	 * program could buffer stderr, or reassign it. */
+
+	register const char *sep;
+
+	sep = ": ";
+	if (!(s && *s)) {			/* Caller did not supply a prefix message */
+		s = (sep += 2);			/* or passed an empty string. */
+	}
+
+#if 1
+#ifdef __STDIO_PRINTF_M_SPEC
+	fprintf(_stderr, "%s%s%m\n", s, sep); /* Use the gnu %m feature. */
+#else
+	/* TODO: use strerror_r instead? */
+	fprintf(_stderr, "%s%s%s\n", s, sep, strerror(errno));
+#endif
+#else
+	/* Note: Assumes stderr not closed or buffered. */
+	__STDIO_THREADLOCK(stderr);
+	_stdio_fdout(STDERR_FILENO, s, sep, strerror(errno));
+	__STDIO_THREADUNLOCK(stderr);
+#endif
+}
+
+#endif
+/**********************************************************************/
+/* UTILITY funcs */
+/**********************************************************************/
+#ifdef L__stdio_fdout
+
+/* Not reentrant -- TODO: lock associated stream if a know file descriptor? */
+
+void _stdio_fdout(int fd, ...)
+{
+	va_list arg;
+	const char *p;
+
+	va_start(arg, fd);
+	while ((p = va_arg(arg, const char *)) != NULL) {
+		write(fd, p, strlen(p));
+	}
+	va_end(arg);
+}
+
+#endif
+/**********************************************************************/
+#ifdef L__uintmaxtostr
+
+/* Avoid using long long / and % operations to cut down dependencies on
+ * libgcc.a.  Definitely helps on i386 at least. */
+#if (UINTMAX_MAX > UINT_MAX) && ((UINTMAX_MAX/UINT_MAX) - 2 <= UINT_MAX)
+#define INTERNAL_DIV_MOD
+#endif
+
+char *_uintmaxtostr(char * __restrict bufend, uintmax_t uval,
+					 int base, __UIM_CASE alphacase)
+{
+    int negative;
+    unsigned int digit;
+#ifdef INTERNAL_DIV_MOD
+	unsigned int H, L, high, low, rh;
+#endif
+
+	negative = 0;
+	if (base < 0) {				/* signed value */
+		base = -base;
+		if (uval > INTMAX_MAX) {
+			uval = -uval;
+			negative = 1;
+		}
+	}
+
+	/* this is an internal routine -- we shouldn't need to check this */
+	assert(!((base < 2) || (base > 36)));
+
+    *bufend = '\0';
+
+#ifndef INTERNAL_DIV_MOD
+    do {
+		digit = uval % base;
+		uval /= base;
+
+		*--bufend = ( (digit < 10) ? digit + '0' : digit + alphacase );
+    } while (uval);
+
+#else  /* ************************************************** */
+
+	H = (UINT_MAX / base);
+	L = UINT_MAX % base + 1;
+	if (L == base) {
+		++H;
+		L = 0;
+	}
+	low = (unsigned int) uval;
+	high = (unsigned int) (uval >> (sizeof(unsigned int) * CHAR_BIT));
+
+    do {
+		rh = high % base;
+		high /= base;
+		digit = (low % base) + (L * rh);
+		low = (low / base) + (H * rh) + (digit / base);
+		digit %= base;
+		
+		*--bufend = ( (digit < 10) ? digit + '0' : digit + alphacase );
+    } while (low | high);
+
+#endif /******************************************************/
+
+    if (negative) {
+		*--bufend = '-';
+    }
+
+    return bufend;
+}
+#undef INTERNAL_DIV_MOD
+
+#endif