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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /stdio/stdio.h
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initial import
Diffstat (limited to 'stdio/stdio.h')
-rw-r--r--stdio/stdio.h681
1 files changed, 681 insertions, 0 deletions
diff --git a/stdio/stdio.h b/stdio/stdio.h
new file mode 100644
index 0000000000..2994432328
--- /dev/null
+++ b/stdio/stdio.h
@@ -0,0 +1,681 @@
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+/*
+ * ANSI Standard: 4.9 INPUT/OUTPUT <stdio.h>
+ */
+
+#ifndef _STDIO_H
+
+#if !defined(__need_FILE)
+#define _STDIO_H 1
+#include <features.h>
+
+__BEGIN_DECLS
+
+#define __need_size_t
+#define __need_NULL
+#include <stddef.h>
+
+#define __need___va_list
+#include <stdarg.h>
+#ifndef __GNUC_VA_LIST
+#define __gnuc_va_list __ptr_t
+#endif
+
+#include <gnu/types.h>
+#endif /* Don't need FILE. */
+#undef __need_FILE
+
+
+#ifndef __FILE_defined
+
+/* The opaque type of streams. */
+typedef struct __stdio_file FILE;
+
+#define __FILE_defined 1
+#endif /* FILE not defined. */
+
+
+#ifdef _STDIO_H
+
+/* The type of the second argument to `fgetpos' and `fsetpos'. */
+typedef __off_t fpos_t;
+
+/* The mode of I/O, as given in the MODE argument to fopen, etc. */
+typedef struct
+{
+ unsigned int __read:1; /* Open for reading. */
+ unsigned int __write:1; /* Open for writing. */
+ unsigned int __append:1; /* Open for appending. */
+ unsigned int __binary:1; /* Opened binary. */
+ unsigned int __create:1; /* Create the file. */
+ unsigned int __exclusive:1; /* Error if it already exists. */
+ unsigned int __truncate:1; /* Truncate the file on opening. */
+} __io_mode;
+
+
+/* Functions to do I/O and file management for a stream. */
+
+/* Read NBYTES bytes from COOKIE into a buffer pointed to by BUF.
+ Return number of bytes read. */
+typedef __ssize_t __io_read_fn __P ((__ptr_t __cookie, char *__buf,
+ size_t __nbytes));
+
+/* Write N bytes pointed to by BUF to COOKIE. Write all N bytes
+ unless there is an error. Return number of bytes written, or -1 if
+ there is an error without writing anything. If the file has been
+ opened for append (__mode.__append set), then set the file pointer
+ to the end of the file and then do the write; if not, just write at
+ the current file pointer. */
+typedef __ssize_t __io_write_fn __P ((__ptr_t __cookie, __const char *__buf,
+ size_t __n));
+
+/* Move COOKIE's file position to *POS bytes from the
+ beginning of the file (if W is SEEK_SET),
+ the current position (if W is SEEK_CUR),
+ or the end of the file (if W is SEEK_END).
+ Set *POS to the new file position.
+ Returns zero if successful, nonzero if not. */
+typedef int __io_seek_fn __P ((__ptr_t __cookie, fpos_t *__pos, int __w));
+
+/* Close COOKIE. */
+typedef int __io_close_fn __P ((__ptr_t __cookie));
+
+/* Return the file descriptor associated with COOKIE,
+ or -1 on error. There need not be any associated file descriptor. */
+typedef int __io_fileno_fn __P ((__ptr_t __cookie));
+
+#ifdef __USE_GNU
+/* User-visible names for the above. */
+typedef __io_read_fn cookie_read_function_t;
+typedef __io_write_fn cookie_write_function_t;
+typedef __io_seek_fn cookie_seek_function_t;
+typedef __io_close_fn cookie_close_function_t;
+typedef __io_fileno_fn cookie_fileno_function_t;
+#endif
+
+/* Low level interface, independent of FILE representation. */
+#if defined (__USE_GNU) && !defined (_LIBC)
+/* Define the user-visible type, with user-friendly member names. */
+typedef struct
+{
+ __io_read_fn *read; /* Read bytes. */
+ __io_write_fn *write; /* Write bytes. */
+ __io_seek_fn *seek; /* Seek/tell file position. */
+ __io_close_fn *close; /* Close file. */
+ __io_fileno_fn *fileno; /* Return file descriptor. */
+} cookie_io_functions_t;
+/* This name is still used in the prototypes in this file. */
+typedef cookie_io_functions_t __io_functions;
+#else
+/* Stick to ANSI-safe names. */
+typedef struct
+{
+ __io_read_fn *__read; /* Read bytes. */
+ __io_write_fn *__write; /* Write bytes. */
+ __io_seek_fn *__seek; /* Seek/tell file position. */
+ __io_close_fn *__close; /* Close file. */
+ __io_fileno_fn *__fileno; /* Return file descriptor. */
+} __io_functions;
+#endif
+
+/* Higher level interface, dependent on FILE representation. */
+typedef struct
+{
+ /* Make room in the input buffer. */
+ int (*__input) __P ((FILE *__stream));
+ /* Make room in the output buffer. */
+ void (*__output) __P ((FILE *__stream, int __c));
+} __room_functions;
+
+extern __const __io_functions __default_io_functions;
+extern __const __room_functions __default_room_functions;
+
+
+/* Default close function. */
+extern __io_close_fn __stdio_close;
+/* Open FILE with mode M, store cookie in *COOKIEPTR. */
+extern int __stdio_open __P ((__const char *__file, __io_mode __m,
+ __ptr_t *__cookieptr));
+/* Put out an error message for when stdio needs to die. */
+extern void __stdio_errmsg __P ((__const char *__msg, size_t __len));
+/* Generate a unique file name (and possibly open it with mode "w+b"). */
+extern char *__stdio_gen_tempname __P ((__const char *__dir,
+ __const char *__pfx,
+ int __dir_search,
+ size_t *__lenptr,
+ FILE **__streamptr));
+
+
+/* Print out MESSAGE on the error output and abort. */
+extern void __libc_fatal __P ((__const char *__message))
+ __attribute__ ((__noreturn__));
+
+
+/* The FILE structure. */
+struct __stdio_file
+{
+ /* Magic number for validation. Must be negative in open streams
+ for the glue to Unix stdio getc/putc to work.
+ NOTE: stdio/glue.c has special knowledge of these first four members. */
+ int __magic;
+#define _IOMAGIC 0xfedabeeb /* Magic number to fill `__magic'. */
+#define _GLUEMAGIC 0xfeedbabe /* Magic for glued Unix streams. */
+
+ char *__bufp; /* Pointer into the buffer. */
+ char *__get_limit; /* Reading limit. */
+ char *__put_limit; /* Writing limit. */
+
+ char *__buffer; /* Base of buffer. */
+ size_t __bufsize; /* Size of the buffer. */
+ __ptr_t __cookie; /* Magic cookie. */
+ __io_mode __mode; /* File access mode. */
+ __io_functions __io_funcs; /* I/O functions. */
+ __room_functions __room_funcs;/* I/O buffer room functions. */
+ fpos_t __offset; /* Current file position. */
+ fpos_t __target; /* Target file position. */
+ FILE *__next; /* Next FILE in the linked list. */
+ char *__pushback_bufp; /* Old bufp if char pushed back. */
+ unsigned char __pushback; /* Pushed-back character. */
+ unsigned int __pushed_back:1; /* A char has been pushed back. */
+ unsigned int __eof:1; /* End of file encountered. */
+ unsigned int __error:1; /* Error encountered. */
+ unsigned int __userbuf:1; /* Buffer from user (should not be freed). */
+ unsigned int __linebuf:1; /* Flush on newline. */
+ unsigned int __linebuf_active:1; /* put_limit is not really in use. */
+ unsigned int __seen:1; /* This stream has been seen. */
+ unsigned int __ispipe:1; /* Nonzero if opened by popen. */
+};
+
+
+/* All macros used internally by other macros here and by stdio functions begin
+ with `__'. All of these may evaluate their arguments more than once. */
+
+
+/* Nonzero if STREAM is a valid stream.
+ STREAM must be a modifiable lvalue (wow, I got to use that term).
+ See stdio/glue.c for what the confusing bit is about. */
+#define __validfp(stream) \
+ (stream != NULL && \
+ ((stream->__magic == _GLUEMAGIC && \
+ (stream = *(((struct { int __magic; FILE **__p; } *) stream)->__p))), \
+ (stream->__magic == _IOMAGIC)))
+
+/* Clear the error and EOF indicators of STREAM. */
+#define __clearerr(stream) ((stream)->__error = (stream)->__eof = 0)
+
+/* Nuke STREAM, making it unusable but available for reuse. */
+extern void __invalidate __P ((FILE *__stream));
+
+/* Make sure STREAM->__offset and STREAM->__target are initialized.
+ Returns 0 if successful, or EOF on
+ error (but doesn't set STREAM->__error). */
+extern int __stdio_check_offset __P ((FILE *__stream));
+
+
+/* The possibilities for the third argument to `setvbuf'. */
+#define _IOFBF 0x1 /* Full buffering. */
+#define _IOLBF 0x2 /* Line buffering. */
+#define _IONBF 0x4 /* No buffering. */
+
+
+/* Default buffer size. */
+#define BUFSIZ 1024
+
+
+/* End of file character.
+ Some things throughout the library rely on this being -1. */
+#define EOF (-1)
+
+
+/* The possibilities for the third argument to `fseek'.
+ These values should not be changed. */
+#define SEEK_SET 0 /* Seek from beginning of file. */
+#define SEEK_CUR 1 /* Seek from current position. */
+#define SEEK_END 2 /* Seek from end of file. */
+
+
+#ifdef __USE_SVID
+/* Default path prefix for `tempnam' and `tmpnam'. */
+#define P_tmpdir "/usr/tmp"
+#endif
+
+
+/* Get the values:
+ L_tmpnam How long an array of chars must be to be passed to `tmpnam'.
+ TMP_MAX The minimum number of unique filenames generated by tmpnam
+ (and tempnam when it uses tmpnam's name space),
+ or tempnam (the two are separate).
+ L_ctermid How long an array to pass to `ctermid'.
+ L_cuserid How long an array to pass to `cuserid'.
+ FOPEN_MAX Mininum number of files that can be open at once.
+ FILENAME_MAX Maximum length of a filename. */
+#include <stdio_lim.h>
+
+
+/* All the known streams are in a linked list
+ linked by the `next' field of the FILE structure. */
+extern FILE *__stdio_head; /* Head of the list. */
+
+/* Standard streams. */
+extern FILE *stdin, *stdout, *stderr;
+#ifdef __STRICT_ANSI__
+/* ANSI says these are macros; satisfy pedants. */
+#define stdin stdin
+#define stdout stdout
+#define stderr stderr
+#endif
+
+
+/* Remove file FILENAME. */
+extern int remove __P ((__const char *__filename));
+/* Rename file OLD to NEW. */
+extern int rename __P ((__const char *__old, __const char *__new));
+
+
+/* Create a temporary file and open it read/write. */
+extern FILE *tmpfile __P ((void));
+/* Generate a temporary filename. */
+extern char *tmpnam __P ((char *__s));
+
+
+#ifdef __USE_SVID
+/* Generate a unique temporary filename using up to five characters of PFX
+ if it is not NULL. The directory to put this file in is searched for
+ as follows: First the environment variable "TMPDIR" is checked.
+ If it contains the name of a writable directory, that directory is used.
+ If not and if DIR is not NULL, that value is checked. If that fails,
+ P_tmpdir is tried and finally "/tmp". The storage for the filename
+ is allocated by `malloc'. */
+extern char *tempnam __P ((__const char *__dir, __const char *__pfx));
+#endif
+
+
+/* This performs actual output when necessary, flushing
+ STREAM's buffer and optionally writing another character. */
+extern int __flshfp __P ((FILE *__stream, int __c));
+
+
+/* Close STREAM, or all streams if STREAM is NULL. */
+extern int fclose __P ((FILE *__stream));
+/* Flush STREAM, or all streams if STREAM is NULL. */
+extern int fflush __P ((FILE *__stream));
+
+
+/* Open a file and create a new stream for it. */
+extern FILE *fopen __P ((__const char *__filename, __const char *__modes));
+/* Open a file, replacing an existing stream with it. */
+extern FILE *freopen __P ((__const char *__filename,
+ __const char *__modes, FILE *__stream));
+
+/* Return a new, zeroed, stream.
+ You must set its cookie and io_mode.
+ The first operation will give it a buffer unless you do.
+ It will also give it the default functions unless you set the `seen' flag.
+ The offset is set to -1, meaning it will be determined by doing a
+ stationary seek. You can set it to avoid the initial tell call.
+ The target is set to -1, meaning it will be set to the offset
+ before the target is needed.
+ Returns NULL if a stream can't be created. */
+extern FILE *__newstream __P ((void));
+
+#ifdef __USE_POSIX
+/* Create a new stream that refers to an existing system file descriptor. */
+extern FILE *fdopen __P ((int __fd, __const char *__modes));
+#endif
+
+#ifdef __USE_GNU
+/* Create a new stream that refers to the given magic cookie,
+ and uses the given functions for input and output. */
+extern FILE *fopencookie __P ((__ptr_t __magic_cookie, __const char *__modes,
+ __io_functions __io_funcs));
+
+/* Create a new stream that refers to a memory buffer. */
+extern FILE *fmemopen __P ((__ptr_t __s, size_t __len, __const char *__modes));
+
+/* Open a stream that writes into a malloc'd buffer that is expanded as
+ necessary. *BUFLOC and *SIZELOC are updated with the buffer's location
+ and the number of characters written on fflush or fclose. */
+extern FILE *open_memstream __P ((char **__bufloc, size_t *__sizeloc));
+#endif
+
+
+/* If BUF is NULL, make STREAM unbuffered.
+ Else make it use buffer BUF, of size BUFSIZ. */
+extern void setbuf __P ((FILE *__stream, char *__buf));
+/* Make STREAM use buffering mode MODE.
+ If BUF is not NULL, use N bytes of it for buffering;
+ else allocate an internal buffer N bytes long. */
+extern int setvbuf __P ((FILE *__stream, char *__buf,
+ int __modes, size_t __n));
+
+#ifdef __USE_BSD
+/* If BUF is NULL, make STREAM unbuffered.
+ Else make it use SIZE bytes of BUF for buffering. */
+extern void setbuffer __P ((FILE *__stream, char *__buf, size_t __size));
+
+/* Make STREAM line-buffered. */
+extern void setlinebuf __P ((FILE *__stream));
+#endif
+
+
+/* Write formatted output to STREAM. */
+extern int fprintf __P ((FILE *__stream, __const char *__format, ...));
+/* Write formatted output to stdout. */
+extern int printf __P ((__const char *__format, ...));
+/* Write formatted output to S. */
+extern int sprintf __P ((char *__s, __const char *__format, ...));
+
+/* Write formatted output to S from argument list ARG. */
+extern int vfprintf __P ((FILE *__s, __const char *__format,
+ __gnuc_va_list __arg));
+/* Write formatted output to stdout from argument list ARG. */
+extern int vprintf __P ((__const char *__format, __gnuc_va_list __arg));
+/* Write formatted output to S from argument list ARG. */
+extern int vsprintf __P ((char *__s, __const char *__format,
+ __gnuc_va_list __arg));
+
+#ifdef __OPTIMIZE__
+extern __inline int
+vprintf (const char *__fmt, __gnuc_va_list __arg)
+{
+ return vfprintf (stdout, __fmt, __arg);
+}
+#endif /* Optimizing. */
+
+#ifdef __USE_GNU
+/* Maximum chars of output to write in MAXLEN. */
+extern int snprintf __P ((char *__s, size_t __maxlen,
+ __const char *__format, ...));
+
+extern int vsnprintf __P ((char *__s, size_t __maxlen,
+ __const char *__format, __gnuc_va_list __arg));
+
+/* Write formatted output to a string dynamically allocated with `malloc'.
+ Store the address of the string in *PTR. */
+extern int vasprintf __P ((char **__ptr, __const char *__f,
+ __gnuc_va_list __arg));
+extern int asprintf __P ((char **__ptr, __const char *__fmt, ...));
+
+/* Write formatted output to a file descriptor. */
+extern int vdprintf __P ((int __fd, __const char *__fmt,
+ __gnuc_va_list __arg));
+extern int dprintf __P ((int __fd, __const char *__fmt, ...));
+#endif
+
+
+/* Read formatted input from STREAM. */
+extern int fscanf __P ((FILE *__stream, __const char *__format, ...));
+/* Read formatted input from stdin. */
+extern int scanf __P ((__const char *__format, ...));
+/* Read formatted input from S. */
+extern int sscanf __P ((__const char *__s, __const char *__format, ...));
+
+#ifdef __USE_GNU
+/* Read formatted input from S into argument list ARG. */
+extern int __vfscanf __P ((FILE *__s, __const char *__format,
+ __gnuc_va_list __arg));
+extern int vfscanf __P ((FILE *__s, __const char *__format,
+ __gnuc_va_list __arg));
+
+/* Read formatted input from stdin into argument list ARG. */
+extern int vscanf __P ((__const char *__format, __gnuc_va_list __arg));
+
+/* Read formatted input from S into argument list ARG. */
+extern int __vsscanf __P ((__const char *__s, __const char *__format,
+ __gnuc_va_list __arg));
+extern int vsscanf __P ((__const char *__s, __const char *__format,
+ __gnuc_va_list __arg));
+
+
+#ifdef __OPTIMIZE__
+extern __inline int
+vfscanf (FILE *__s, const char *__fmt, __gnuc_va_list __arg)
+{
+ return __vfscanf (__s, __fmt, __arg);
+}
+extern __inline int
+vscanf (const char *__fmt, __gnuc_va_list __arg)
+{
+ return __vfscanf (stdin, __fmt, __arg);
+}
+extern __inline int
+vsscanf (const char *__s, const char *__fmt, __gnuc_va_list __arg)
+{
+ return __vsscanf (__s, __fmt, __arg);
+}
+#endif /* Optimizing. */
+#endif /* Use GNU. */
+
+
+/* This does actual reading when necessary, filling STREAM's
+ buffer and returning the first character in it. */
+extern int __fillbf __P ((FILE *__stream));
+
+
+/* Read a character from STREAM. */
+extern int fgetc __P ((FILE *__stream));
+extern int getc __P ((FILE *__stream));
+
+/* Read a character from stdin. */
+extern int getchar __P ((void));
+
+/* The C standard explicitly says this can
+ re-evaluate its argument, so it does. */
+#define __getc(stream) \
+ ((stream)->__bufp < (stream)->__get_limit ? \
+ (int) ((unsigned char) *(stream)->__bufp++) : __fillbf(stream))
+
+/* The C standard explicitly says this is a macro,
+ so we always do the optimization for it. */
+#define getc(stream) __getc(stream)
+
+#ifdef __OPTIMIZE__
+extern __inline int
+getchar (void)
+{
+ return __getc (stdin);
+}
+#endif /* Optimizing. */
+
+
+/* Write a character to STREAM. */
+extern int fputc __P ((int __c, FILE *__stream));
+extern int putc __P ((int __c, FILE *__stream));
+
+/* Write a character to stdout. */
+extern int putchar __P ((int __c));
+
+
+/* The C standard explicitly says this can
+ re-evaluate its arguments, so it does. */
+#define __putc(c, stream) \
+ ((stream)->__bufp < (stream)->__put_limit ? \
+ (int) (unsigned char) (*(stream)->__bufp++ = (unsigned char) (c)) : \
+ __flshfp ((stream), (unsigned char) (c)))
+
+/* The C standard explicitly says this can be a macro,
+ so we always do the optimization for it. */
+#define putc(c, stream) __putc ((c), (stream))
+
+#ifdef __OPTIMIZE__
+extern __inline int
+putchar (int __c)
+{
+ return __putc (__c, stdout);
+}
+#endif
+
+
+#if defined(__USE_SVID) || defined(__USE_MISC)
+/* Get a word (int) from STREAM. */
+extern int getw __P ((FILE *__stream));
+
+/* Write a word (int) to STREAM. */
+extern int putw __P ((int __w, FILE *__stream));
+#endif
+
+
+/* Get a newline-terminated string of finite length from STREAM. */
+extern char *fgets __P ((char *__s, int __n, FILE *__stream));
+
+/* Get a newline-terminated string from stdin, removing the newline.
+ DO NOT USE THIS FUNCTION!! There is no limit on how much it will read. */
+extern char *gets __P ((char *__s));
+
+
+#ifdef __USE_GNU
+#include <sys/types.h>
+
+/* Read up to (and including) a DELIMITER from STREAM into *LINEPTR
+ (and null-terminate it). *LINEPTR is a pointer returned from malloc (or
+ NULL), pointing to *N characters of space. It is realloc'd as
+ necessary. Returns the number of characters read (not including the
+ null terminator), or -1 on error or EOF. */
+ssize_t __getdelim __P ((char **__lineptr, size_t *__n,
+ int __delimiter, FILE *__stream));
+ssize_t getdelim __P ((char **__lineptr, size_t *__n,
+ int __delimiter, FILE *__stream));
+
+/* Like `getdelim', but reads up to a newline. */
+ssize_t __getline __P ((char **__lineptr, size_t *__n, FILE *__stream));
+ssize_t getline __P ((char **__lineptr, size_t *__n, FILE *__stream));
+
+#ifdef __OPTIMIZE__
+extern __inline ssize_t
+__getline (char **__lineptr, size_t *__n, FILE *__stream)
+{
+ return __getdelim (__lineptr, __n, '\n', __stream);
+}
+
+extern __inline ssize_t
+getdelim (char **__lineptr, size_t *__n, int __delimiter, FILE *__stream)
+{
+ return __getdelim (__lineptr, __n, __delimiter, __stream);
+}
+extern __inline ssize_t
+getline (char **__lineptr, size_t *__n, FILE *__stream)
+{
+ return __getline (__lineptr, __n, __stream);
+}
+#endif /* Optimizing. */
+#endif
+
+
+/* Write a string to STREAM. */
+extern int fputs __P ((__const char *__s, FILE *__stream));
+/* Write a string, followed by a newline, to stdout. */
+extern int puts __P ((__const char *__s));
+
+
+/* Push a character back onto the input buffer of STREAM. */
+extern int ungetc __P ((int __c, FILE *__stream));
+
+
+/* Read chunks of generic data from STREAM. */
+extern size_t fread __P ((__ptr_t __ptr, size_t __size,
+ size_t __n, FILE *__stream));
+/* Write chunks of generic data to STREAM. */
+extern size_t fwrite __P ((__const __ptr_t __ptr, size_t __size,
+ size_t __n, FILE *__s));
+
+
+/* Seek to a certain position on STREAM. */
+extern int fseek __P ((FILE *__stream, long int __off, int __whence));
+/* Return the current position of STREAM. */
+extern long int ftell __P ((FILE *__stream));
+/* Rewind to the beginning of STREAM. */
+extern void rewind __P ((FILE *__stream));
+
+/* Get STREAM's position. */
+extern int fgetpos __P ((FILE *__stream, fpos_t *__pos));
+/* Set STREAM's position. */
+extern int fsetpos __P ((FILE *__stream, __const fpos_t *__pos));
+
+
+/* Clear the error and EOF indicators for STREAM. */
+extern void clearerr __P ((FILE *__stream));
+/* Return the EOF indicator for STREAM. */
+extern int feof __P ((FILE *__stream));
+/* Return the error indicator for STREAM. */
+extern int ferror __P ((FILE *__stream));
+
+#ifdef __OPTIMIZE__
+#define feof(stream) ((stream)->__eof != 0)
+#define ferror(stream) ((stream)->__error != 0)
+#endif /* Optimizing. */
+
+
+/* Print a message describing the meaning of the value of errno. */
+extern void perror __P ((__const char *__s));
+
+#ifdef __USE_BSD
+extern int sys_nerr;
+extern char *sys_errlist[];
+#endif
+#ifdef __USE_GNU
+extern int _sys_nerr;
+extern char *_sys_errlist[];
+#endif
+
+
+#ifdef __USE_POSIX
+/* Return the system file descriptor for STREAM. */
+extern int fileno __P ((FILE *__stream));
+#endif /* Use POSIX. */
+
+
+#if (defined (__USE_POSIX2) || defined(__USE_SVID) || defined(__USE_BSD) || \
+ defined(__USE_MISC))
+/* Create a new stream connected to a pipe running the given command. */
+extern FILE *popen __P ((__const char *__command, __const char *__modes));
+
+/* Close a stream opened by popen and return the status of its child. */
+extern int pclose __P ((FILE *__stream));
+#endif
+
+
+#ifdef __USE_POSIX
+/* Return the name of the controlling terminal. */
+extern char *ctermid __P ((char *__s));
+/* Return the name of the current user. */
+extern char *cuserid __P ((char *__s));
+#endif
+
+
+#ifdef __USE_GNU
+struct obstack; /* See <obstack.h>. */
+
+/* Open a stream that writes to OBSTACK. */
+extern FILE *open_obstack_stream __P ((struct obstack *__obstack));
+
+/* Write formatted output to an obstack. */
+extern int obstack_printf __P ((struct obstack *__obstack,
+ __const char *__format, ...));
+extern int obstack_vprintf __P ((struct obstack *__obstack,
+ __const char *__format,
+ __gnuc_va_list __args));
+#endif
+
+
+__END_DECLS
+
+#endif /* <stdio.h> included. */
+
+#endif /* stdio.h */