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setbuf (3)
  • setbuf (3) ( Solaris man: Библиотечные вызовы )
  • setbuf (3) ( FreeBSD man: Библиотечные вызовы )
  • setbuf (3) ( Русские man: Библиотечные вызовы )
  • setbuf (3) ( Linux man: Библиотечные вызовы )
  • >> setbuf (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    setbuf - assign buffering to a stream
     
    

    SYNOPSIS

    #include <stdio.h>

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

    DESCRIPTION

    The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to the ISO C standard.

    Except that it returns no value, the function call:

    
    setbuf(stream, buf)
    
    

    shall be equivalent to:

    
    setvbuf(stream, buf, _IOFBF, BUFSIZ)
    
    

    if buf is not a null pointer, or to:

    
    setvbuf(stream, buf, _IONBF, BUFSIZ)
    
    

    if buf is a null pointer.  

    RETURN VALUE

    The setbuf() function shall not return a value.  

    ERRORS

    No errors are defined.

    The following sections are informative.  

    EXAMPLES

    None.  

    APPLICATION 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.

    With setbuf(), allocating a buffer of BUFSIZ bytes does not necessarily imply that all of BUFSIZ bytes are used for the buffer area.  

    RATIONALE

    None.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

    fopen() , setvbuf() , the Base Definitions volume of IEEE Std 1003.1-2001, <stdio.h>  

    COPYRIGHT

    Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


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