putw_unlock man page on HP-UX

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putc(3S)							      putc(3S)

NAME
       putc(), putchar(), fputc(), putw() - put character or word on a stream

SYNOPSIS
   Obsolescent Interfaces
DESCRIPTION
       Writes the character
		      c	 onto the output stream at the position where the file
		      pointer, if defined, is pointing.	 is defined as and are
		      defined both as macros and as functions.

       Same as	      but is a function rather than a macro, and can therefore
		      be used as an argument.  runs more slowly than but takes
		      less space per invocation, and its name can be passed as
		      an argument to a function.

       Writes the word (i.e.,
		      in C) w to the output stream (at the position  at	 which
		      the file pointer, if defined, is pointing).  The size of
		      a word is the size of an integer and varies from machine
		      to  machine.   neither assumes nor causes special align‐
		      ment in the file.

       Output streams, with the exception of the standard error stream are  by
       default	buffered  if  the output refers to a file and line-buffered if
       the output refers to a terminal.	 The standard error output stream,  is
       by  default  unbuffered, but use of (see fopen(3S)) causes it to become
       buffered or line-buffered.  or (see setbuf(3S)) can be used  to	change
       the stream's buffering strategy.	 put character on a stream.

   Obsolescent Interfaces
       put character or word on a stream.

APPLICATION USAGE
       After  or is applied to a stream, the stream becomes byte-oriented (see
       orientation(5)).

RETURN VALUE
       On success, and each return the value they have written.	  On  failure,
       they  return  the constant EOF, set the error indicator for the stream,
       and set to indicate the error.

       On success, and return 0.  Otherwise, a non-zero value is returned, the
       error  indicator	 for  the  stream  is  set, and is set to indicate the
       error.

ERRORS
       and fail if, either the stream is unbuffered or stream's buffer	needed
       to be flushed causing an underlying call to be invoked, and:

	      [EAGAIN]	     The  flag is set for the file descriptor underly‐
			     ing stream and the process would  be  delayed  in
			     the write operation.

	      [EBADF]	     The  file	descriptor  underlying stream is not a
			     valid file descriptor open for writing.

	      [EFBIG]	     An attempt was made  to  write  to	 a  file  that
			     exceeds the process's file size limit or the max‐
			     imum file size (see ulimit(2)).

	      [EINTR]	     A signal was caught during the system call.

	      [EIO]	     A physical I/O error has occurred, or the process
			     is	 in a background process group and is attempt‐
			     ing to write to its controlling terminal, is set,
			     the  process is neither ignoring nor blocking the
			     signal, and the process group of the  process  is
			     orphaned.

	      [ENOSPC]	     There  was	 no free space remaining on the device
			     containing the file.

	      [EPIPE]	     An attempt is made to write to  a	pipe  or  FIFO
			     that  is  not open for reading by any process.  A
			     signal is also sent to the process.

       Additional values can be set by the underlying function (see write(2)).

WARNINGS
       The and routines are implemented as both library functions and  macros.
       The macro versions, which are used by default, are defined in To obtain
       the library function either use a to remove the macro definition or, if
       compiling  in  ANSI-C mode, enclose the function name in parentheses or
       use the function address.  The following example	 illustrates  each  of
       these methods:

		...
		    ...
		    ...
		    ...

       Line  buffering	may cause confusion or malfunctioning of programs that
       use standard I/O routines but use  themselves  to  read	from  standard
       input.	When a large amount of computation is done after printing part
       of a line on an output terminal, it is necessary	 to  (see  fclose(3S))
       the standard output before beginning the computation.

       The  macro  version of incorrectly treats the argument stream with side
       effects.	 In particular, the following call may not work as expected:

       The function version of or should be used instead.

       Because of possible differences in word length and byte ordering, files
       written	using  are  machine-dependent, and may not be readable by on a
       different processor.

       is an obsolescent  interface  supported	only  for  compatibility  with
       existing	 DCE  applications.  New multithreaded applications should use
       and

   Reentrant Interfaces
       If is defined, the locked versions of the library functions for and are
       used by default.

SEE ALSO
       fclose(3S),  ferror(3S), flockfile(3S), fopen(3S), getc(3S), fread(3S),
       printf(3S), puts(3S), setbuf(3S), orientation(5), thread_safety(5).

STANDARDS CONFORMANCE
								      putc(3S)
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