개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

setbuf(3c)

Standard C Library Functions                                        setbuf(3C)



NAME
       setbuf, setvbuf - assign buffering to a stream

SYNOPSIS
       #include <stdio.h>

       void setbuf(FILE *stream, char *buf);


       int setvbuf(FILE *stream, char *buf, int type, size_t size);

DESCRIPTION
       The setbuf() function may be used after the stream pointed to by stream
       (see intro(3)) is 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 com‐
       pletely  unbuffered.  The  constant  BUFSIZ,  defined  in the <stdio.h>
       header, indicates the size of the array pointed to by buf.


       The setvbuf() function may be used after a stream is opened but  before
       it  is read or written. The type argument determines how stream will be
       buffered. Legal values for type (defined in <stdio.h>) are:

       _IOFBF    Input/output to be fully buffered.


       _IOLBF    Output to be line buffered; the buffer will be flushed when a
                 NEWLINE   is  written,  the  buffer  is  full,  or  input  is
                 requested.


       _IONBF    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. The size argu‐
       ment specifies the size of the buffer to be used.  If  input/output  is
       unbuffered, buf and size are ignored.


       For a further discussion of buffering, see stdio(3C).

RETURN VALUES
       If  an illegal value for type is provided, setvbuf() returns a non-zero
       value. Otherwise, it returns 0.

USAGE
       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.


       When using setbuf(), buf should always be sized using  BUFSIZ.  If  the
       array  pointed  to  by buf is larger than BUFSIZ, a portion of buf will
       not be used. If buf is smaller than BUFSIZ, other memory may  be  unex‐
       pectedly overwritten.


       Parts  of  buf will be used for internal bookkeeping of the stream and,
       therefore, buf will contain less than size bytes when full. It is  rec‐
       ommended  that stdio(3C) be used to handle buffer allocation when using
       setvbuf().

ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE  VALUE _ Interface StabilityCommitted _ MT-LevelMT-Safe _ Stan‐
       dardSee standards(7).


SEE ALSO
       malloc(3C), fopen(3C), getc(3C),  putc(3C),  stdio(3C),  attributes(7),
       standards(7)



Oracle Solaris 11.4               14 Aug 2002                       setbuf(3C)