auto import from //depot/cupcake/@135843
diff --git a/libc/include/stdio.h b/libc/include/stdio.h
new file mode 100644
index 0000000..79e526b
--- /dev/null
+++ b/libc/include/stdio.h
@@ -0,0 +1,437 @@
+/* $OpenBSD: stdio.h,v 1.35 2006/01/13 18:10:09 miod Exp $ */
+/* $NetBSD: stdio.h,v 1.18 1996/04/25 18:29:21 jtc Exp $ */
+
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)stdio.h 5.17 (Berkeley) 6/3/91
+ */
+
+#ifndef _STDIO_H_
+#define _STDIO_H_
+
+#include <sys/cdefs.h>
+#include <sys/_types.h>
+
+/* va_list and size_t must be defined by stdio.h according to Posix */
+#define __need___va_list
+#include <stdarg.h>
+
+/* note that this forces stddef.h to *only* define size_t */
+#define __need_size_t
+#include <stddef.h>
+
+#include <stddef.h>
+
+#if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE
+#include <sys/types.h> /* XXX should be removed */
+#endif
+
+#ifndef _SIZE_T_DEFINED_
+#define _SIZE_T_DEFINED_
+typedef unsigned long size_t;
+#endif
+
+#ifndef _OFF_T_DEFINED_
+#define _OFF_T_DEFINED_
+typedef long off_t;
+#endif
+
+#ifndef NULL
+#ifdef __GNUG__
+#define NULL __null
+#else
+#define NULL 0L
+#endif
+#endif
+
+#define _FSTDIO /* Define for new stdio with functions. */
+
+typedef off_t fpos_t; /* stdio file position type */
+
+/*
+ * NB: to fit things in six character monocase externals, the stdio
+ * code uses the prefix `__s' for stdio objects, typically followed
+ * by a three-character attempt at a mnemonic.
+ */
+
+/* stdio buffers */
+struct __sbuf {
+ unsigned char *_base;
+ int _size;
+};
+
+/*
+ * stdio state variables.
+ *
+ * The following always hold:
+ *
+ * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
+ * _lbfsize is -_bf._size, else _lbfsize is 0
+ * if _flags&__SRD, _w is 0
+ * if _flags&__SWR, _r is 0
+ *
+ * This ensures that the getc and putc macros (or inline functions) never
+ * try to write or read from a file that is in `read' or `write' mode.
+ * (Moreover, they can, and do, automatically switch from read mode to
+ * write mode, and back, on "r+" and "w+" files.)
+ *
+ * _lbfsize is used only to make the inline line-buffered output stream
+ * code as compact as possible.
+ *
+ * _ub, _up, and _ur are used when ungetc() pushes back more characters
+ * than fit in the current _bf, or when ungetc() pushes back a character
+ * that does not match the previous one in _bf. When this happens,
+ * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
+ * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
+ */
+typedef struct __sFILE {
+ unsigned char *_p; /* current position in (some) buffer */
+ int _r; /* read space left for getc() */
+ int _w; /* write space left for putc() */
+ short _flags; /* flags, below; this FILE is free if 0 */
+ short _file; /* fileno, if Unix descriptor, else -1 */
+ struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
+ int _lbfsize; /* 0 or -_bf._size, for inline putc */
+
+ /* operations */
+ void *_cookie; /* cookie passed to io functions */
+ int (*_close)(void *);
+ int (*_read)(void *, char *, int);
+ fpos_t (*_seek)(void *, fpos_t, int);
+ int (*_write)(void *, const char *, int);
+
+ /* extension data, to avoid further ABI breakage */
+ struct __sbuf _ext;
+ /* data for long sequences of ungetc() */
+ unsigned char *_up; /* saved _p when _p is doing ungetc data */
+ int _ur; /* saved _r when _r is counting ungetc data */
+
+ /* tricks to meet minimum requirements even when malloc() fails */
+ unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
+ unsigned char _nbuf[1]; /* guarantee a getc() buffer */
+
+ /* separate buffer for fgetln() when line crosses buffer boundary */
+ struct __sbuf _lb; /* buffer for fgetln() */
+
+ /* Unix stdio files get aligned to block boundaries on fseek() */
+ int _blksize; /* stat.st_blksize (may be != _bf._size) */
+ fpos_t _offset; /* current lseek offset */
+} FILE;
+
+__BEGIN_DECLS
+extern FILE __sF[];
+__END_DECLS
+
+#define __SLBF 0x0001 /* line buffered */
+#define __SNBF 0x0002 /* unbuffered */
+#define __SRD 0x0004 /* OK to read */
+#define __SWR 0x0008 /* OK to write */
+ /* RD and WR are never simultaneously asserted */
+#define __SRW 0x0010 /* open for reading & writing */
+#define __SEOF 0x0020 /* found EOF */
+#define __SERR 0x0040 /* found error */
+#define __SMBF 0x0080 /* _buf is from malloc */
+#define __SAPP 0x0100 /* fdopen()ed in append mode */
+#define __SSTR 0x0200 /* this is an sprintf/snprintf string */
+#define __SOPT 0x0400 /* do fseek() optimisation */
+#define __SNPT 0x0800 /* do not do fseek() optimisation */
+#define __SOFF 0x1000 /* set iff _offset is in fact correct */
+#define __SMOD 0x2000 /* true => fgetln modified _p text */
+#define __SALC 0x4000 /* allocate string space dynamically */
+
+/*
+ * The following three definitions are for ANSI C, which took them
+ * from System V, which brilliantly took internal interface macros and
+ * made them official arguments to setvbuf(), without renaming them.
+ * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
+ *
+ * Although numbered as their counterparts above, the implementation
+ * does not rely on this.
+ */
+#define _IOFBF 0 /* setvbuf should set fully buffered */
+#define _IOLBF 1 /* setvbuf should set line buffered */
+#define _IONBF 2 /* setvbuf should set unbuffered */
+
+#define BUFSIZ 1024 /* size of buffer used by setbuf */
+
+#define EOF (-1)
+
+/*
+ * FOPEN_MAX is a minimum maximum, and should be the number of descriptors
+ * that the kernel can provide without allocation of a resource that can
+ * fail without the process sleeping. Do not use this for anything.
+ */
+#define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */
+#define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */
+
+/* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
+#if __BSD_VISIBLE || __XPG_VISIBLE
+#define P_tmpdir "/tmp/"
+#endif
+#define L_tmpnam 1024 /* XXX must be == PATH_MAX */
+#define TMP_MAX 308915776
+
+#ifndef SEEK_SET
+#define SEEK_SET 0 /* set file offset to offset */
+#endif
+#ifndef SEEK_CUR
+#define SEEK_CUR 1 /* set file offset to current plus offset */
+#endif
+#ifndef SEEK_END
+#define SEEK_END 2 /* set file offset to EOF plus offset */
+#endif
+
+#define stdin (&__sF[0])
+#define stdout (&__sF[1])
+#define stderr (&__sF[2])
+
+/*
+ * Functions defined in ANSI C standard.
+ */
+__BEGIN_DECLS
+void clearerr(FILE *);
+int fclose(FILE *);
+int feof(FILE *);
+int ferror(FILE *);
+int fflush(FILE *);
+int fgetc(FILE *);
+int fgetpos(FILE *, fpos_t *);
+char *fgets(char *, int, FILE *);
+FILE *fopen(const char *, const char *);
+int fprintf(FILE *, const char *, ...);
+int fputc(int, FILE *);
+int fputs(const char *, FILE *);
+size_t fread(void *, size_t, size_t, FILE *);
+FILE *freopen(const char *, const char *, FILE *);
+int fscanf(FILE *, const char *, ...);
+int fseek(FILE *, long, int);
+int fseeko(FILE *, off_t, int);
+int fsetpos(FILE *, const fpos_t *);
+long ftell(FILE *);
+off_t ftello(FILE *);
+size_t fwrite(const void *, size_t, size_t, FILE *);
+int getc(FILE *);
+int getchar(void);
+char *gets(char *);
+#if __BSD_VISIBLE && !defined(__SYS_ERRLIST)
+#define __SYS_ERRLIST
+
+extern int sys_nerr; /* perror(3) external variables */
+extern char *sys_errlist[];
+#endif
+void perror(const char *);
+int printf(const char *, ...);
+int putc(int, FILE *);
+int putchar(int);
+int puts(const char *);
+int remove(const char *);
+int rename(const char *, const char *);
+void rewind(FILE *);
+int scanf(const char *, ...);
+void setbuf(FILE *, char *);
+int setvbuf(FILE *, char *, int, size_t);
+int sprintf(char *, const char *, ...);
+int sscanf(const char *, const char *, ...);
+FILE *tmpfile(void);
+char *tmpnam(char *);
+int ungetc(int, FILE *);
+int vfprintf(FILE *, const char *, __va_list);
+int vprintf(const char *, __va_list);
+int vsprintf(char *, const char *, __va_list);
+
+#if __ISO_C_VISIBLE >= 1999 || __BSD_VISIBLE
+int snprintf(char *, size_t, const char *, ...)
+ __attribute__((__format__ (printf, 3, 4)))
+ __attribute__((__nonnull__ (3)));
+int vfscanf(FILE *, const char *, __va_list)
+ __attribute__((__format__ (scanf, 2, 0)))
+ __attribute__((__nonnull__ (2)));
+int vscanf(const char *, __va_list)
+ __attribute__((__format__ (scanf, 1, 0)))
+ __attribute__((__nonnull__ (1)));
+int vsnprintf(char *, size_t, const char *, __va_list)
+ __attribute__((__format__ (printf, 3, 0)))
+ __attribute__((__nonnull__ (3)));
+int vsscanf(const char *, const char *, __va_list)
+ __attribute__((__format__ (scanf, 2, 0)))
+ __attribute__((__nonnull__ (2)));
+#endif /* __ISO_C_VISIBLE >= 1999 || __BSD_VISIBLE */
+
+__END_DECLS
+
+
+/*
+ * Functions defined in POSIX 1003.1.
+ */
+#if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE
+#define L_ctermid 1024 /* size for ctermid(); PATH_MAX */
+#define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */
+
+__BEGIN_DECLS
+char *ctermid(char *);
+char *cuserid(char *);
+FILE *fdopen(int, const char *);
+int fileno(FILE *);
+
+#if (__POSIX_VISIBLE >= 199209) || 1 /* ANDROID: Bionic does include this */
+int pclose(FILE *);
+FILE *popen(const char *, const char *);
+#endif
+
+#if __POSIX_VISIBLE >= 199506
+void flockfile(FILE *);
+int ftrylockfile(FILE *);
+void funlockfile(FILE *);
+
+/*
+ * These are normally used through macros as defined below, but POSIX
+ * requires functions as well.
+ */
+int getc_unlocked(FILE *);
+int getchar_unlocked(void);
+int putc_unlocked(int, FILE *);
+int putchar_unlocked(int);
+#endif /* __POSIX_VISIBLE >= 199506 */
+
+#if __XPG_VISIBLE
+char *tempnam(const char *, const char *);
+#endif
+__END_DECLS
+
+#endif /* __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE */
+
+/*
+ * Routines that are purely local.
+ */
+#if __BSD_VISIBLE
+__BEGIN_DECLS
+int asprintf(char **, const char *, ...)
+ __attribute__((__format__ (printf, 2, 3)))
+ __attribute__((__nonnull__ (2)));
+char *fgetln(FILE *, size_t *);
+int fpurge(FILE *);
+int getw(FILE *);
+int putw(int, FILE *);
+void setbuffer(FILE *, char *, int);
+int setlinebuf(FILE *);
+int vasprintf(char **, const char *, __va_list)
+ __attribute__((__format__ (printf, 2, 0)))
+ __attribute__((__nonnull__ (2)));
+__END_DECLS
+
+/*
+ * Stdio function-access interface.
+ */
+__BEGIN_DECLS
+FILE *funopen(const void *,
+ int (*)(void *, char *, int),
+ int (*)(void *, const char *, int),
+ fpos_t (*)(void *, fpos_t, int),
+ int (*)(void *));
+__END_DECLS
+#define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0)
+#define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
+#endif /* __BSD_VISIBLE */
+
+/*
+ * Functions internal to the implementation.
+ */
+__BEGIN_DECLS
+int __srget(FILE *);
+int __swbuf(int, FILE *);
+__END_DECLS
+
+/*
+ * The __sfoo macros are here so that we can
+ * define function versions in the C library.
+ */
+#define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++))
+#if defined(__GNUC__)
+static __inline int __sputc(int _c, FILE *_p) {
+ if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
+ return (*_p->_p++ = _c);
+ else
+ return (__swbuf(_c, _p));
+}
+#else
+/*
+ * This has been tuned to generate reasonable code on the vax using pcc.
+ */
+#define __sputc(c, p) \
+ (--(p)->_w < 0 ? \
+ (p)->_w >= (p)->_lbfsize ? \
+ (*(p)->_p = (c)), *(p)->_p != '\n' ? \
+ (int)*(p)->_p++ : \
+ __swbuf('\n', p) : \
+ __swbuf((int)(c), p) : \
+ (*(p)->_p = (c), (int)*(p)->_p++))
+#endif
+
+#define __sfeof(p) (((p)->_flags & __SEOF) != 0)
+#define __sferror(p) (((p)->_flags & __SERR) != 0)
+#define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
+#define __sfileno(p) ((p)->_file)
+
+#define feof(p) __sfeof(p)
+#define ferror(p) __sferror(p)
+
+#ifndef _POSIX_THREADS
+#define clearerr(p) __sclearerr(p)
+#endif
+
+#if __POSIX_VISIBLE
+#define fileno(p) __sfileno(p)
+#endif
+
+#ifndef lint
+#ifndef _POSIX_THREADS
+#define getc(fp) __sgetc(fp)
+#endif /* _POSIX_THREADS */
+#define getc_unlocked(fp) __sgetc(fp)
+/*
+ * The macro implementations of putc and putc_unlocked are not
+ * fully POSIX compliant; they do not set errno on failure
+ */
+#if __BSD_VISIBLE
+#ifndef _POSIX_THREADS
+#define putc(x, fp) __sputc(x, fp)
+#endif /* _POSIX_THREADS */
+#define putc_unlocked(x, fp) __sputc(x, fp)
+#endif /* __BSD_VISIBLE */
+#endif /* lint */
+
+#define getchar() getc(stdin)
+#define putchar(x) putc(x, stdout)
+#define getchar_unlocked() getc_unlocked(stdin)
+#define putchar_unlocked(c) putc_unlocked(c, stdout)
+
+#endif /* _STDIO_H_ */