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@node Stdio

@chapter Input and Output (@file{stdio.h})

This chapter comprises functions to manage files

or other input/output streams. Among these functions are subroutines

to generate or scan strings according to specifications from a format string.

The underlying facilities for input and output depend on the host

system, but these functions provide a uniform interface.

The corresponding declarations are in @file{stdio.h}.

The reentrant versions of these functions use macros

@example

_stdin_r(@var{reent})

_stdout_r(@var{reent})

_stderr_r(@var{reent})

@end example

@noindent

instead of the globals @code{stdin}, @code{stdout}, and

@code{stderr}.  The argument <[reent]> is a pointer to a reentrancy

structure.

@menu

* clearerr::    Clear file or stream error indicator

* fclose::      Close a file

* feof::        Test for end of file

* ferror::      Test whether read/write error has occurred

* fflush::      Flush buffered file output

* fgetc::       Get a character from a file or stream

* fgetpos::     Record position in a stream or file

* fgets::       Get character string from a file or stream

* fiprintf::    Write formatted output to file (integer only)

* fopen::       Open a file

* fdopen::      Turn an open file into a stream

* fputc::       Write a character on a stream or file

* fputs::       Write a character string in a file or stream

* fread::       Read array elements from a file

* freopen::     Open a file using an existing file descriptor

* fseek::       Set file position

* fsetpos::     Restore position of a stream or file

* ftell::       Return position in a stream or file

* fwrite::      Write array elements from memory to a file or stream

* getc::        Get a character from a file or stream (macro)

* getchar::     Get a character from standard input (macro)

* gets::        Get character string from standard input (obsolete)

* getw::        Get a word (int) from a file or stream

* iprintf::     Write formatted output (integer only)

* mktemp::      Generate unused file name

* perror::      Print an error message on standard error

* putc::        Write a character on a stream or file (macro)

* putchar::     Write a character on standard output (macro)

* puts::        Write a character string on standard output

* putw::        Write a word (int) to a file or stream

* remove::      Delete a file's name

* rename::      Rename a file

* rewind::      Reinitialize a file or stream

* setbuf::      Specify full buffering for a file or stream

* setvbuf::     Specify buffering for a file or stream

* siprintf::    Write formatted output (integer only)

* printf::      Write formatted output

* scanf::       Scan and format input

* tmpfile::     Create a temporary file

* tmpnam::      Generate name for a temporary file

* vprintf::     Format variable argument list

@end menu

@page

@include stdio/clearerr.def

@page

@include stdio/fclose.def

@page

@include stdio/feof.def

@page

@include stdio/ferror.def

@page

@include stdio/fflush.def

@page

@include stdio/fgetc.def

@page

@include stdio/fgetpos.def

@page

@include stdio/fgets.def

@page

@include stdio/fiprintf.def

@page

@include stdio/fopen.def

@page

@include stdio/fdopen.def

@page

@include stdio/fputc.def

@page

@include stdio/fputs.def

@page

@include stdio/fread.def

@page

@include stdio/freopen.def

@page

@include stdio/fseek.def

@page

@include stdio/fsetpos.def

@page

@include stdio/ftell.def

@page

@include stdio/fwrite.def

@page

@include stdio/getc.def

@page

@include stdio/getchar.def

@page

@include stdio/gets.def

@page

@include stdio/getw.def

@page

@include stdio/iprintf.def

@page

@include stdio/mktemp.def

@page

@include stdio/perror.def

@page

@include stdio/putc.def

@page

@include stdio/putchar.def

@page

@include stdio/puts.def

@page

@include stdio/putw.def

@page

@include stdio/remove.def

@page

@include stdio/rename.def

@page

@include stdio/rewind.def

@page

@include stdio/setbuf.def

@page

@include stdio/setvbuf.def

@page

@include stdio/siprintf.def

@page

@include stdio/sprintf.def

@page

@include stdio/sscanf.def

@page

@include stdio/tmpfile.def

@page

@include stdio/tmpnam.def

@page

@include stdio/vfprintf.def