add directory Minix

Minix/1.7.5/MANUALS/CAT3/SETBUF.3

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+NAME
+	  setbuf, setvbuf - assign buffering to	a stream
+SYNTAX
+	  #include <stdio.h>
+	  void setbuf (stream, buf)
+	  FILE *stream;
+	  char *buf;
+	  int setvbuf (stream, buf, type, size)
+	  FILE *stream;
+	  char *buf;
+	  int type, size;
+DESCRIPTION
+	  Setbuf may be	used after a stream has	been opened but	before
+	  it is	read or	written.  It causes the	array pointed to by
+	  buf to be used instead of an automatically allocated buffer.
+	  If buf is the	NULL pointer input/output will be completely
+	  unbuffered.
+	  A constant BUFSIZ, defined in	the <stdio.h> header file,
+	  tells	how big	an array is needed:
+	       char buf[BUFSIZ];
+	  Setvbuf may be used after a stream has been opened but
+	  before it is read or written.	 Type determines how stream
+	  will be buffered.  Legal values for type (defined in
+	  stdio.h) are:
+	  _IOFBF  causes input/output to be fully buffered.
+	  _IOLBF  causes output	to be line buffered; the buffer	will
+		  be flushed when a newline is written,	the buffer is
+		  full,	or input is requested.
+	  _IONBF  causes input/output to be completely unbuffered.
+	  If buf is not	the NULL pointer, the array it points to will
+	  be used for buffering, instead of an automatically allocated
+	  buffer.  Size	specifies the size of the buffer to be used.
+	  The constant BUFSIZ in <stdio.h> is suggested	as a good
+	  buffer size.	If input/output	is unbuffered, buf and size
+	  are ignored.
+	  By default, output to	a terminal is line buffered and	all
+	  other	input/output is	fully buffered.
+SEE ALSO
+	  fopen(3S), getc(3S), malloc(3C), putc(3S), stdio(3S).
+				  
+DIAGNOSTICS
+	  If an	illegal	value for type or size is provided, setvbuf
+	  returns a non-zero value. Otherwise, the value returned will
+	  be zero.
+     NOTE
+	  A common source of error is allocating buffer	space as an
+	  ``automatic''	variable in a code block, and then failing to
+	  close	the stream in the same block.
+