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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 */
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 */
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/*
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/*
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FUNCTION
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FUNCTION
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<>---test whether read/write error has occurred
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<>, <>---test whether read/write error has occurred
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INDEX
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	ferror
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INDEX
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INDEX
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	ferror
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	ferror_unlocked
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ANSI_SYNOPSIS
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	#include
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	int ferror(FILE *<[fp]>);
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ANSI_SYNOPSIS
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	#define _BSD_SOURCE
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	#include
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	#include
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	int ferror(FILE *<[fp]>);
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	int ferror_unlocked(FILE *<[fp]>);
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TRAD_SYNOPSIS
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	#include
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	int ferror(<[fp]>)
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	FILE *<[fp]>;
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TRAD_SYNOPSIS
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	#define _BSD_SOURCE
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	#include
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	#include
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	int ferror(<[fp]>)
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	int ferror_unlocked(<[fp]>)
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	FILE *<[fp]>;
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	FILE *<[fp]>;
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DESCRIPTION
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DESCRIPTION
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The <> functions maintain an error indicator with each file
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pointer <[fp]>, to record whether any read or write errors have
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occurred on the associated file or stream.
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Use <> to query this indicator.
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See <> to reset the error indicator.
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<> is a non-thread-safe version of <>.
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<> may only safely be used within a scope
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The <> functions maintain an error indicator with each file
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protected by flockfile() (or ftrylockfile()) and funlockfile().  This
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pointer <[fp]>, to record whether any read or write errors have
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function may safely be used in a multi-threaded program if and only
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occurred on the associated file or stream.
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if they are called while the invoking thread owns the (FILE *)
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Use <> to query this indicator.
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object, as is the case after a successful call to the flockfile() or
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ftrylockfile() functions.  If threads are disabled, then
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<> is equivalent to <>.
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See <> to reset the error indicator.
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RETURNS
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<> returns <<0>> if no errors have occurred; it returns a
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RETURNS
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nonzero value otherwise.
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<> returns <<0>> if no errors have occurred; it returns a
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